CN114877113B - Prevent frostbite and split valve body and contain its gas heater - Google Patents

Abstract

The invention discloses an anti-frost-crack valve body and a gas water heater comprising the same, wherein the anti-frost-crack valve body comprises a first pipe fitting and a second pipe fitting, the outer wall of the first pipe fitting is provided with a clamping part, and the side wall of the second pipe fitting is provided with a clamping part; the clamping piece has a first state and a second state, and can be clamped with the clamping part when the clamping piece is in the first state; when the clamping piece is in the second state, the clamping piece can be in clamping relation with the clamping part; from the in-process that first temperature dropped to the second temperature, joint spare switches over to the second state from first state, and first pipe fitting and second pipe fitting can be kept away from relatively under the exogenic action to realize the space grow of the rivers passageway between first pipe fitting and the second pipe fitting. Under the severe cold condition in winter, when the water temperature is reduced to the second temperature, the volume of the water is increased in the process of forming ice to push the first pipe fitting and the second pipe fitting to be relatively far away, the space of the water flow channel is increased, and the whole water flow channel is prevented from being cracked or frozen.

Description

Antifreeze crack valve body and gas water heater containing it

technical field

The invention relates to an anti-freezing and cracking valve body and a gas water heater comprising the same.

Background technique

In winter, when the cold air comes, the temperature will drop rapidly. The water in the waterway of the gas water heater will freeze due to the low temperature, and the ice will expand outwards, which will easily damage the pipeline and cause the gas water heater to burst. If the water inlet valve can be found and closed in time, it will cause water leakage of the whole machine, and lead to property damage such as floor soaking, electrical leakage and other problems that endanger safety.

Contents of the invention

The technical problem to be solved by the present invention is to provide an anti-freezing and cracking valve body and a gas water heater containing it in order to overcome the defect in the prior art that the pipelines in the gas water heater are prone to freezing and cracking in severe winter conditions.

The present invention solves the above technical problems through the following technical solutions:

The invention provides an anti-freeze crack valve body, the anti-freeze crack valve body comprises:

a first pipe, the outer wall of the first pipe has a clamping portion;

a second pipe, the first pipe is at least partially placed in the second pipe and communicated with the second pipe, and the side wall of the second pipe has a snap-fit;

The clamping member has a first state and a second state. When the clamping member is in the first state, the clamping member can be engaged with the clamping part, so that the first pipe and the The second pipe part is relatively fixed; when the clip part is in the second state, the clip part can be released from the clip part, so that the first pipe part and the second part Pipe fittings can move relatively;

During the process of dropping from the first temperature to the second temperature, the clamping member switches from the first state to the second state, the clamping portion and the clamping member release the clamping relationship, the The first pipe part and the second pipe part can be relatively far apart under the action of an external force, so as to enlarge the space of the water flow channel between the first pipe part and the second pipe part.

In this solution, the above-mentioned structural form is adopted. In the case of severe cold in winter, when the water temperature drops to the second temperature, the clamping part and the clamping part are released from the clamping relationship, so that the first pipe part and the second pipe part can move relatively. The water freezes, and the volume of the water freezes increases to push the first pipe and the second pipe relatively far away. After the water freezes, the enlarged volume is released, and the water flow channel space between the first pipe and the second pipe becomes larger. Large, so as to prevent the entire water flow channel from being cracked or frozen, thereby reducing or avoiding the occurrence of water leakage of the whole machine, water soaking in the floor, electrical leakage and other property losses and endangering safety.

Preferably, the side wall of the second pipe member is provided with a through hole and is connected with a sleeve, the clamping member is placed in the sleeve, and the clamping member can pass through the through hole and connect with the The clamping part is clamped.

In this solution, the above-mentioned structural form is adopted, and the clamping part is placed in the sleeve to reduce the erosion of the clamping part by the water flow, thereby reducing wear on the clamping part and prolonging the service life of the clamping part. The through hole provided on the sleeve enables the clamping piece to be clamped with the first pipe piece.

Preferably, the clamping member includes a clamping rod and a first retractable driver, and during the switching process between the first temperature and the second temperature, the first retractable driver Drive the clamping rod to move along the through hole.

In this solution, the above-mentioned structural form is adopted, and the first retractable driving member changes its expansion and contraction amount according to the temperature change, so as to drive the snap-in rod to move away from or close to the snap-in portion, thereby controlling the snap-in rod and the snap-in The clamping relationship between parts is convenient for automatic control and management.

Preferably, the clamping rod includes a first rod and a second rod fixed crosswise, the first telescopic driver is sleeved on the outer peripheral side of the first rod, and the first retractable One end of the telescopic driver abuts against an end face of the second rod away from the first pipe, and the other end of the first telescopic driver abuts against the inner wall of the sleeve to drive the first The rod moves along its extension direction.

In this solution, the above-mentioned structural form is adopted, since the first rod and the second rod are cross-fixed, and the first telescopic driving member telescopically pushes the second rod to move, so that the first rod moves away from or close to the sleeve. The direction of the inner wall abutting against the first retractable driving part in the barrel moves in the direction to realize the cooperation between the clamping rod and the clamping part. The space layout is reasonable and compact, and the structure is simple and easy to process.

Preferably, the first retractable driving member is a first memory alloy elastic member.

In this solution, the above-mentioned structural form is adopted. During the process of dropping from the first temperature to the second temperature, the first memory alloy elastic part shrinks, driving the first rod to move away from the clamping part; When the first temperature is reached, the first memory alloy elastic part is stretched, pushing the first rod to move in the direction close to the clamping part, without electric drive, and adopting a mechanical structure to realize the clamping connection between the clamping part and the clamping part It has good reliability and can provide effective protection when the power is off.

Preferably, the second rod is connected to the middle part of the first rod, and the clamping member further includes a spring sleeved on the outer peripheral side of the first rod, and one end of the spring abuts against the One end surface of the second rod close to the first pipe, and the other end of the spring abuts against the outer wall of the second pipe.

In this solution, the above-mentioned structural form is adopted, and a spring is provided to limit the distance that the first rod protrudes from the through hole, so as to prevent the first rod from protruding too long and damaging the first pipe.

Preferably, a groove is formed on the outer wall of the first pipe member to form the engaging portion, and the groove cooperates and engages with the engaging rod.

In this solution, the above-mentioned structural form is adopted, and a groove is provided on the outer wall of the first pipe member, which is convenient for processing, and a clamping relationship is formed through the cooperation between the clamping rod and the groove, and the clamping effect is stable.

Preferably, the anti-freeze cracking valve body includes a reset member, and during the process of rising from the second temperature to the first temperature, the reset member makes the first pipe and the second pipe close to each other and Return to the initial relative position.

In this solution, the above-mentioned structural form is adopted. During the process of rising from the second temperature to the first temperature, the reset member makes the volume of the movable channel between the first pipe part and the second pipe part smaller and returns to the original state, so as to realize Automatic reset.

Preferably, the reset member includes a second retractable driving member, the two ends of the second retractable driving member abut against the first pipe member and the second pipe member respectively, and the During the process of the first temperature, the second retractable driving member realizes the relative movement of the first pipe member and the second pipe member by stretching.

In this solution, the above-mentioned structural form is adopted, and according to the change of temperature, the second telescopic driving part realizes the relative movement between the first pipe part and the second pipe part by stretching, so that the first pipe part and the second pipe part return to the initial relative position Realize automatic reset.

Preferably, the second telescopic driver is sleeved on the outer peripheral side of the first pipe and placed between the first pipe and the second pipe, and the outer wall of the first pipe has a first The inner wall of the second pipe member has a second protrusion, and the two ends of the second telescopic driver abut against the first protrusion and the second protrusion respectively.

In this solution, the above-mentioned structural form is adopted, and the second telescopic driver is sleeved on the outer peripheral side of the first pipe for easy installation, and the second telescopic driver is placed between the outer wall of the first pipe and the inner wall of the second pipe , to prevent the disengagement of the second retractable driver. In addition, the two ends of the second retractable driving part abut against the first protrusion and the second protrusion respectively, which is convenient for controlling the relative position between the first pipe part and the second pipe part, and prevents the first pipe part and the second pipe part from collapsing. In the process of relatively moving away, the first pipe part is separated from the second pipe part.

Preferably, the second pipe includes a second pipe body and a retaining ring, the retaining ring is connected to the end of the second pipe body and sleeved on the outer peripheral side of the first pipe, and the retaining ring The inner diameter of the ring is smaller than the inner diameter of the second tubular body to form the second protrusion.

In this solution, the above-mentioned structural form is adopted, and the second pipe fitting is arranged separately, which is convenient for processing. In addition, if any part of the second pipe fitting body and the retaining ring is damaged, only one of them needs to be replaced, which saves cost, and through Install the retaining ring to form the second protrusion for easy assembly.

Preferably, the second retractable driving member is a second memory alloy elastic member.

In this solution, the above-mentioned structural form is adopted, no need to be driven by electricity, and a mechanical structure is adopted to realize that the water flow channel between the first pipe and the second pipe can be adjusted according to the change of temperature, and the reliability is good. When the power is cut off, it can play a role effective protection.

Preferably, a sealing ring is provided between the outer wall of the first pipe member and the inner wall of the second pipe member.

In this solution, the above-mentioned structural form is adopted to prevent water from flowing out from the gap between the outer wall of the first pipe part and the inner wall of the second pipe part, so that the antifreeze cracking valve body has good sealing performance.

The present invention also provides a gas water heater, which comprises the anti-freeze cracking valve body as described above.

Preferably, the anti-freeze cracking valve body is connected to the water inlet pipeline, a water outlet is provided at the end of the first pipe member far away from the second pipe member, and a movable valve is installed between the water outlet and the water inlet pipeline. Connecting pipe.

In this solution, the above-mentioned structural form is adopted to reduce or avoid the phenomenon that the water inlet pipeline needs to be moved with the movement of the first pipe piece, resulting in damage, and there is no need to consider that the water inlet pipeline needs to be reserved for its movement. Larger assembly space and compact structure.

The positive progress effect of the present invention is:

In the case of the antifreeze cracking valve body in the present invention, when the water temperature drops to the second temperature when the water temperature drops to the second temperature, the clamping part and the clamping part release the clamping relationship, so that the first pipe part and the second pipe part can move relative to each other. Ice formation, the volume of the water in the process of freezing becomes larger and the first pipe and the second pipe are relatively far away, and the volume that becomes larger after the water freezes is released, and the water flow channel space between the first pipe and the second pipe becomes larger, In this way, the entire water channel is prevented from being cracked or frozen, thereby reducing or avoiding the occurrence of water leakage of the whole machine, water soaking in the floor, electrical leakage and other property losses and endangering safety.

Description of drawings

Fig. 1 is a schematic structural view of the clamping member in the first state of the anti-freezing crack valve body according to the preferred embodiment of the present invention.

Fig. 2 is a schematic structural view of the clamping member in the second state of the anti-freezing crack valve body according to the preferred embodiment of the present invention.

Fig. 3 is a schematic diagram of the installation of the anti-freezing and cracking valve body in a gas water heater according to a preferred embodiment of the present invention.

Explanation of reference signs:

first fitting 1

Clamping part 11

first protrusion 12

Outlet 13

Second pipe fitting 2

The second pipe fitting body 21

Clip 211

Snap rod 2111

The first rod 21111

Second rod 21112

First retractable driver 2112

Spring 2113

Through hole 212

Sleeve 213

Second protrusion 214

Water inlet 215

retaining ring 22

reset part 3

Second retractable driver 31

Sealing ring 4

Water inlet pipe 5

Flexible connection tube 6

Detailed ways

The present invention is further illustrated below by means of examples, but the present invention is not therefore limited to the scope of the following examples.

An embodiment of the present invention provides an anti-freeze crack valve body, as shown in FIG. 1 and FIG. 2 . The antifreeze cracking valve body includes a first pipe piece 1 and a second pipe piece 2. The first pipe piece 1 is at least partly placed in the second pipe piece 2 and communicated with the second pipe piece 2. The outer wall of the first pipe piece 1 has a clamping part 11, and the second pipe piece 1 The side wall of the tube part 2 has a snap-fitting part 211 . The clamping part 211 has a first state and a second state. When the clamping part 211 is in the first state, the clamping part 211 can be clamped with the clamping part 11, so that the first pipe 1 and the second pipe 2 are relatively fixed; When the clamping part 211 is in the second state, the clamping part 211 can release the clamping relationship with the clamping part 11, so that the first pipe part 1 and the second pipe part 2 can move relatively. During the process of dropping from the first temperature to the second temperature, the clamping member 211 switches from the first state to the second state, and the clamping portion 11 and the clamping member 211 release the clamping relationship, and the first pipe 1 and the second pipe 2 They can be relatively separated under the action of external force, so that the space of the water flow channel between the first pipe part 1 and the second pipe part 2 becomes larger. Wherein, the first temperature is that the water temperature is above 0 degrees Celsius, and the second temperature is that the water temperature is below 0 degrees Celsius. When the temperature is at the first temperature, the clamping member 211 is in the first state, and the relative position between the first pipe 1 and the second pipe 2 is shown in FIG. 1 ; from the first temperature to the second temperature, the clamping member 211 After switching to the second state, the relative position between the first pipe 1 and the second pipe 2 is shown in FIG. 2 . It can be seen that when the first temperature drops to the second temperature, the second pipe part 2 and the first pipe part 1 are far away from each other, so that the water flow channel between the first pipe part 1 and the second pipe part 2 forms a movable channel, and can move The channel space becomes larger.

In this embodiment, in the case of severe cold in winter, when the water temperature drops to the second temperature, the clamping part 11 and the clamping part 211 release the clamping relationship, so that the first pipe part 1 and the second pipe part 2 can move relatively. The water freezes, and the volume of the water freezes increases to push the first pipe 1 and the second pipe 2 relatively far away. After the water freezes, the increased volume is released, and the space between the first pipe 1 and the second pipe The space of the water flow channel becomes larger, so as to prevent the entire water flow channel from being cracked or frozen, thereby reducing or avoiding the occurrence of water leakage of the whole machine, water soaking in the floor, electrical leakage and other property losses and endangering safety.

A through hole 212 is defined on the side wall of the second pipe member 2 and is connected with a sleeve 213 . The engaging member 211 is placed in the sleeve 213 , and the engaging member 211 can pass through the through hole 212 and engage with the engaging portion 11 . Specifically, the sleeve 213 is connected to the outer wall of the second pipe member 2, the through hole 212 communicates with the inner cavity of the sleeve 213, and the clamping member 211 passes through the through hole 212, that is, the clamping member 211 passes through the side wall of the second pipe member 2, And engage with the engaging portion 11 of the outer wall of the first pipe member 1 . The clamping part 211 is placed in the sleeve 213 to reduce the erosion of the water flow on the clamping part 211 , thereby reducing wear on the clamping part 211 and prolonging the service life of the clamping part 211 . The through hole 212 provided on the sleeve 213 enables the engaging member 211 to be engaged with the first pipe member 1 .

In this embodiment, the clamping member 211 includes a clamping rod 2111 and a first retractable driving member 2112. During the switching process between the first temperature and the second temperature, the first retractable driving member 2112 drives the card by stretching. The rod 2111 moves along the through hole 212 . In the process of switching between the first temperature and the second temperature, the first retractable driving member 2112 drives the clamping rod 2111 to move along the through hole 212 through expansion and contraction. In the process of dropping from the first temperature to the second temperature, the first telescopic driving member 2112 is affected by the temperature, and its expansion and contraction amount changes, driving the clamping rod 2111 connected to it to pass through the through hole 212 to realize the connection with the first pipe member 1 Clamping, so as to realize the relative fixation between the first pipe 1 and the second pipe 2; in the process of rising from the second temperature to the first temperature, the first retractable driving member 2112 is affected by the temperature, and its stretching amount changes , to drive the clamping rod 2111 connected thereto away from the clamping part 11, so that the first pipe part 1 and the second pipe part 2 can move relatively. The first retractable driving member 2112 changes its expansion and contraction amount according to the temperature change, so as to drive the clamping rod 2111 to move away from or close to the clamping part 11, thereby controlling the clamping between the clamping rod 2111 and the clamping part 11 It is convenient for automatic control and easy to manage.

In this embodiment, the snap-in rod 2111 includes a first rod 21111 and a second rod 21112 that are cross-fixed. The first telescopic driver 2112 is sleeved on the outer peripheral side of the first rod 21111 , and the first telescopic One end of the driver 2112 abuts against the end surface of the second rod 21112 away from the first pipe 1, and the other end of the first telescopic driver 2112 abuts against the inner wall of the sleeve 213 to drive the first rod 21111 along its Movement in the direction of extension. Since the first rod 21111 and the second rod 21112 are cross-fixed, the first telescopic driving member 2112 telescopically pushes the second rod 21112 to move, so that the first rod 21111 moves away from or close to the middle of the sleeve 213 and the second A retractable driving member 2112 moves in the direction of the inner wall abutted against, so as to realize the cooperation between the clamping rod 2111 and the clamping part 11 , the space layout is reasonable and compact, and the structure is simple, which is convenient for processing.

The first retractable driving part 2112 is a first memory alloy elastic part. In the process of dropping from the first temperature to the second temperature, the first memory alloy elastic part shrinks, driving the first rod 21111 to move away from the clamping part 11; from the second temperature to the first temperature, the first memory alloy The alloy elastic part is elongated, pushing the first rod 21111 to move in the direction close to the clamping part 11, without electric drive, and adopting a mechanical structure to realize the clamping and unclamping between the clamping part 211 and the clamping part 11 Relationship, good reliability, and effective protection when power is off. Preferably, the first telescopic driving member 2112 is a memory alloy spring, which is easy to process and has good telescopic performance.

The second rod 21112 is connected to the middle of the first rod 21111, and the clip 211 also includes a spring 2113 sleeved on the outer peripheral side of the first rod 21111. One end of the spring 2113 abuts against the center of the second rod 21112 near the first One end surface of the pipe member 1 and the other end of the spring 2113 abut against the outer wall of the second pipe member 2 . A spring is provided to limit the distance that the first rod 21111 protrudes from the through hole 212 , preventing the first rod 21111 from protruding too long and damaging the first pipe 1 . Wherein, the spring can be an ordinary spring or a memory alloy spring.

Specifically, the first rod 21111 and the second rod 21112 are arranged perpendicular to each other, and the length direction of the first rod 21111 is on the same line as the axial direction of the through hole 212 , and the first rod 21111 passes through the through hole 212 less likely to be blocked. The end of the sleeve 213 away from the first pipe 1 has a receiving chamber so that when the first rod 21111 moves along its length direction, the contact interference between the first rod 21111 and the sleeve 213 is prevented, and the space layout is reasonable.

The outer wall of the first pipe member 1 is provided with a groove to form the clamping portion 11 , and the groove cooperates with the clamping rod 2111 to be clamped. A groove is provided on the outer wall of the first pipe member 1 to facilitate processing, and a locking relationship is formed through the cooperation between the locking rod 2111 and the groove, and the locking effect is stable.

The anti-freeze cracking valve body includes a reset member 3. During the process of rising from the second temperature to the first temperature, the reset member 3 makes the first pipe member 1 and the second pipe member 2 approach each other and return to the initial relative position. During the process of rising from the second temperature to the first temperature, the reset member 3 makes the volume of the movable channel between the first pipe member 1 and the second pipe member 2 smaller and returns to the original state, so as to realize automatic reset.

The reset member 3 includes a second retractable driving member 31, and the two ends of the second retractable driving member 31 abut against the first pipe member 1 and the second pipe member 2 respectively. During the process of rising from the second temperature to the first temperature, the second The stretchable driving part 31 realizes the relative movement between the first pipe part 1 and the second pipe part 2 by stretching. According to the temperature change, the second retractable driving part 31 realizes the relative movement of the first pipe part 1 and the second pipe part 2 by stretching, so that the first pipe part 1 and the second pipe part 2 return to the initial relative position to realize automatic reset.

In this embodiment, the second retractable driving member 31 is sleeved on the outer peripheral side of the first pipe member 1 and placed between the first pipe member 1 and the second pipe member 2, and the outer wall of the first pipe member 1 has a first protrusion 12. The inner wall of the second pipe member 2 has a second protruding portion 214, and the two ends of the second retractable driving member 31 abut against the first protruding portion 12 and the second protruding portion 214 respectively. The second telescopic driver 31 is sleeved on the outer peripheral side of the first pipe 1 for easy installation. The second telescopic driver 31 is placed between the outer wall of the first pipe 1 and the inner wall of the second pipe 2 to prevent the second flexible The disengagement of telescoping drive member 31. In addition, the two ends of the second retractable driving member 31 respectively abut against the first protruding portion 12 and the second protruding portion 214, which is convenient for controlling the relative position between the first pipe member 1 and the second pipe member 2, and prevents the first During the relative distance between the pipe 1 and the second pipe 2 , the first pipe 1 is separated from the second pipe 2 .

In this embodiment, the second pipe 2 includes a second pipe body 21 and a retaining ring 22, the retaining ring 22 is connected to the end of the second pipe body 21 and sleeved on the outer peripheral side of the first pipe 1, and the retaining ring 22 The inner diameter of is smaller than the inner diameter of the second pipe body 21 to form the second protrusion 214 . The second pipe fitting 2 is set in separate parts, which is convenient for processing. In addition, if any part of the second pipe fitting body 21 and the retaining ring 22 is damaged, only one of them needs to be replaced, which saves cost, and the retaining ring 22 is installed to form the second pipe fitting. The two protrusions 214 are convenient for assembly. Specifically, the retaining ring 22 is mounted on the end of the second pipe body 21 and connected with the second pipe body 21 by bolts, which is easy to disassemble.

The second retractable driving part 31 is a second memory alloy elastic part. The second memory alloy elastic part changes its expansion and contraction with the change of temperature, the temperature rises, the elasticity becomes larger, and the second memory alloy elastic part elongates; the temperature decreases, the elasticity becomes smaller, and the second memory alloy elastic part contracts. In the process of dropping from the first temperature to the second temperature, the clamping part 211 and the clamping part 11 are released from the clamping relationship, and the volume of the water freezes becomes larger, pushing the first pipe part 1 and the second pipe part 2 to move away relatively, so as to be able to The active water flow channel reserves the space after the water freezes, so that the space after the water freezes can be released, and at this time the second memory alloy elastic part shrinks, without interfering with the relative movement of the first pipe 1 and the second pipe 2; When the temperature rises from the second temperature to the first temperature, the second memory alloy elastic part is stretched, so that the first pipe part 1 and the second pipe part 2 approach each other and return to the initial relative position to realize reset. The antifreeze cracking valve body of this embodiment does not need to be driven by electricity, and adopts a mechanical structure to realize that the water flow channel between the first pipe fitting 1 and the second pipe fitting 2 can be adjusted according to the change of temperature, has good reliability, and can play a role in power failure. effective protection. Preferably, the second telescopic driving member 31 is a memory alloy spring, which is easy to process and has good telescopic performance. In addition, the first memory alloy elastic part and the second memory alloy elastic part can use the same material.

A sealing ring 4 is provided between the outer wall of the first pipe part 1 and the inner wall of the second pipe part 2 . The arrangement of the sealing ring 4 prevents water flow from flowing out from the gap between the outer wall of the first pipe part 1 and the inner wall of the second pipe part 2, so that the sealing performance of the anti-freeze cracking valve body is good.

In specific use, in normal use, the clamping member 211 is in the first state, and the clamping member 211 is engaged with the clamping portion 11 so that the second pipe 2 will not move relative to the first pipe 1 . When the temperature drops, the elastic force of the first memory alloy elastic part and the second memory alloy elastic part gradually decreases. When the temperature drops to the second temperature, that is, the water temperature drops below 0 degrees Celsius, the compression of the first memory alloy elastic part makes The extension rod 2111 is away from the clamping part 11 and released from the clamping relationship with the first pipe part 1, and the volume of the water freezing process becomes larger, which can push the first pipe part 1 away from the second pipe part 2, and reserve water outlet for the movable water flow channel The space after the freezing of water releases the space after the freezing of water, and at this time the second memory alloy elastic part shrinks without interfering with the relative movement of the first pipe part 1 and the second pipe part 2 . When the temperature rises, the elastic force of the first memory alloy elastic part and the second memory alloy elastic part gradually increases, and the second memory alloy elastic part stretches so that the first pipe part 1 gradually approaches the second pipe part 2 and returns to the initial relative position At the same time, the first memory alloy elastic part is gradually extended to push the clamping rod 2111 into the groove of the first pipe part 1, so as to realize the fixing of the first pipe part 1 relative to the second pipe part 2, automatically reset, and return to the original state. Continue to use it next time. This scheme adopts a purely mechanical mechanism, which can provide effective protection in severe winter conditions, especially when the power is cut off.

An embodiment of the present invention also provides a gas water heater. As shown in FIG. 3 , the gas water heater includes the cracked valve body as described in any one of the above embodiments.

In this embodiment, the anti-freeze cracking valve body is connected to the water inlet pipeline 5, and the end of the first pipe fitting 1 away from the second pipe fitting 2 is provided with a water outlet 13, and a movable connection pipe is installed between the water outlet 13 and the water inlet pipeline 5 6. A water inlet 215 is provided on the side wall of one end of the second pipe fitting 2 close to the first pipe fitting 1, and the water flow flows into the movable channel between the first pipe fitting 1 and the second pipe fitting 2 through the water inlet 13, and then flows out through the water outlet 13 to prevent freezing and cracking Valve body, to enter water inlet pipeline 5. Since the first pipe 1 can move away from or close to the second pipe 2, the first pipe 1 can be moved, and the end of the first pipe 1 away from the second pipe 2 is connected to the water inlet pipeline 5 through a movable connection pipe 6 , to reduce or avoid the phenomenon that the water inlet pipeline 5 needs to be moved with the movement of the first pipe member 1, thereby causing damage, and there is no need to consider that the water inlet pipeline 5 requires its movement to reserve a larger assembly space , compact structure.

Although the specific implementation of the present invention has been described above, those skilled in the art should understand that this is only an example, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims (11)

1. An antifreeze crack valve body is characterized in that, the antifreeze crack valve body comprises: a first pipe, the outer wall of the first pipe has a clamping portion; a second pipe, the first pipe is at least partly placed in the second pipe and communicated with the second pipe, and the side wall of the second pipe has a snap-fit; The clamping member has a first state and a second state. When the clamping member is in the first state, the clamping member can be engaged with the clamping part, so that the first pipe and the The second pipe part is relatively fixed; when the clip part is in the second state, the clip part can be released from the clip part, so that the first pipe part and the second part Pipe fittings can move relatively; During the process of dropping from the first temperature to the second temperature, the clamping member switches from the first state to the second state, the clamping portion and the clamping member release the clamping relationship, the The first pipe part and the second pipe part can be relatively far away from each other under the action of an external force, so that the space of the water flow channel between the first pipe part and the second pipe part becomes larger; The side wall of the second pipe is provided with a through hole and is connected with a sleeve, the clamping member is placed in the sleeve, the clamping member can pass through the through hole and engage with the clamping portion catch; The clamping member includes a clamping rod and a first retractable driver, and during the process of switching between the first temperature and the second temperature, the first retractable driver drives the clamp the connecting rod moves along the through hole; A groove is formed on the outer wall of the first pipe member to form the clamping portion, and the groove cooperates with the clamping rod to clamp. 2. The anti-freezing and cracking valve body according to claim 1, characterized in that, the clamping rod includes a first rod and a second rod fixed crosswise, and the first telescopic driver is sleeved on the The outer peripheral side of the first rod, and one end of the first telescopic driver abuts against an end face of the second rod that is away from the first pipe, and the other end of the first telescopic driver abuts against the outer peripheral side of the first rod. connected to the inner wall of the sleeve to drive the first rod to move along its extending direction. 3. The anti-freezing and cracking valve body according to claim 2, characterized in that, the first retractable driving member is a first memory alloy elastic member. 4. The anti-freezing and cracking valve body according to claim 2, wherein the second rod is connected to the middle part of the first rod, and the clamping member also includes a sleeve sleeved on the first rod. A spring on the outer peripheral side of the member, one end of the spring abuts against an end surface of the second rod member close to the first pipe member, and the other end of the spring abuts against the outer wall of the second pipe member. 5. The anti-freezing and cracking valve body according to claim 1, characterized in that, the anti-freezing and cracking valve body comprises a reset member, and during the process of rising from the second temperature to the first temperature, the reset member makes The first pipe member and the second pipe member approach each other and return to an initial relative position. 6. The anti-freezing and cracking valve body according to claim 5, wherein the reset member comprises a second telescopic driver, and the two ends of the second telescopic driver abut against the first pipe member and the first pipe respectively. During the process of raising the second pipe from the second temperature to the first temperature, the second telescopic driving member is stretched to achieve relative movement between the first pipe and the second pipe. 7. The anti-freeze cracking valve body according to claim 6, characterized in that, the second telescopic driver is sleeved on the outer peripheral side of the first pipe and placed between the first pipe and the second pipe. Between the pipe parts, the outer wall of the first pipe part has a first protrusion, the inner wall of the second pipe part has a second protrusion, and the two ends of the second telescopic driving part respectively abut against the first protruding portion and the second protruding portion. 8. The anti-freeze cracking valve body according to claim 7, characterized in that, the second pipe fitting comprises a second pipe fitting body and a retaining ring, and the retaining ring is connected to the end of the second pipe fitting body and sheathed On the outer peripheral side of the first pipe, and the inner diameter of the retaining ring is smaller than the inner diameter of the second pipe body to form the second protrusion. 9. The anti-freeze cracking valve body according to claim 1, wherein a sealing ring is provided between the outer wall of the first pipe member and the inner wall of the second pipe member. 10. A gas water heater, characterized in that the gas water heater comprises the antifreeze cracking valve body according to any one of claims 1-9. 11. The gas water heater according to claim 10, characterized in that, the antifreeze crack valve body is connected to the water inlet pipeline, and the end of the first pipe part far away from the second pipe part is provided with a water outlet, and the water outlet A movable connection pipe is installed between the water inlet pipeline.

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