CN111520523A - A connection structure of a double-coil solenoid valve and a thermocouple suitable for gas appliances - Google Patents

Abstract

The invention relates to a connection structure of a double-coil solenoid valve and a thermocouple suitable for gas appliances, comprising a solenoid valve connection part, a thermocouple connection part, a thermocouple assembly and a ground wire terminal. The solenoid valve connecting part includes a connecting bracket, a base and a pin assembly. The thermocouple connection part includes a thermocouple connection plastic cap and a core wire terminal assembly. The ground terminal is composed of a conductive sleeve and a crimping shrapnel formed by the extension of the conductive sleeve. The thermocouple assembly includes a temperature-sensing head element and a temperature-sensing shell, and the temperature-sensing head element and the temperature-sensing shell are respectively electrically connected with the pin assembly and the pressure wire spring. The conductive sleeve is sleeved on the thermocouple connection plastic cap, and is integrally installed in the connection bracket. On the one hand, it ensures that a stable current loop is formed between the connection part of the solenoid valve and the thermocouple assembly, ensures that the thermocouple assembly has good grounding, and saves the installation screw process of the grounding wire; on the other hand, it can also avoid the whole machine The problem of winding between multiple thermocouple wires during batch assembly.

Description

A connection structure of a double-coil solenoid valve and a thermocouple suitable for gas appliances

technical field

The invention relates to the technical field of gas appliance manufacturing, in particular to a connection structure of a double-coil solenoid valve and a thermocouple suitable for gas appliances.

Background technique

The gas solenoid valve is a safety emergency cut-off device for the gas pipeline. It can be connected with the gas leakage alarm system or with the fire and other intelligent alarm control terminal modules to realize the automatic/manual emergency cut-off of the gas source on-site or remotely to ensure the safety of gas use. In the event of accidental flameout or harmful strong vibrations, the solenoid valve automatically closes. The gas flameout protection devices on the market are mainly composed of a thermocouple connection part, a solenoid valve connection part and a thermocouple assembly. The solenoid valve connecting part includes a connecting bracket, a base and a pin assembly. The thermocouple assembly can generate millivolt-level thermoelectric potential in the flame. At the same time, the connection part of the solenoid valve installed in the valve seat is connected and conducted with the thermocouple connection part. Under the action of the thermoelectric potential, the solenoid valve is kept at In the suction state, the gas is turned on. It is known that a thermocouple assembly includes a temperature-sensing head element and a temperature-sensing shell, wherein the temperature-sensing head element must always be electrically connected to the pin assembly in the connecting portion of the solenoid valve, and the temperature-sensing shell must always be electrically connected to the connecting bracket , thus forming a current loop.

In the prior art, a wire is usually welded on the outer side wall of the temperature-sensing housing, and the circular terminal provided at the end of the wire is fixed on the valve seat by means of screws (as shown in Figure 1). During mass assembly, there will be entanglement between multiple thermocouple wires, which requires extra straightening, which increases the difficulty of assembly. In addition, when the operator actually performs the installation operation of gas appliances, it has to spend a lot of material consumption and assembly time. To a certain extent, it increases the difficulty and cost of installation. Therefore, there is an urgent need for technicians to solve the above problems.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a connection structure of a dual-coil solenoid valve and a thermocouple suitable for gas appliances with simple structure design, good conductivity and simple assembly.

In order to solve the above technical problems, the present invention relates to a connection structure of a double-coil solenoid valve and a thermocouple suitable for gas appliances, which includes a solenoid valve connection part, a thermocouple connection part, a thermocouple assembly and a ground terminal. The solenoid valve connecting portion is arranged just below the thermocouple connecting portion, and is inserted and connected to each other. The solenoid valve connecting part includes a connecting bracket, a base and a pin assembly. The pin assembly includes main line pins and auxiliary line pins. The thermocouple connection part includes a thermocouple connection plastic cap and a core wire terminal assembly matched with the pin assembly. The core wire terminal assembly is inserted and fixed in the inner cavity of the thermocouple connection plastic cap, which includes a main wire terminal adapted and inserted with the above-mentioned main wire pins and an auxiliary wire matched with the above-mentioned auxiliary wire pins. terminal. The ground terminal is composed of a conductive sleeve and a crimping shrapnel formed by the extension of the conductive sleeve. The thermocouple assembly includes a temperature-sensing head element and a temperature-sensing shell sleeved on the periphery of the temperature-sensing head element, wherein the temperature-sensing head element and the temperature-sensing shell are respectively electrically connected with the pin assembly and the pressure wire spring. The conductive sleeve is sleeved on the outer side wall of the thermocouple connecting cap and integrally installed in the inner cavity of the connecting bracket, so that it is sandwiched between the thermocouple connecting cap and the connecting bracket to realize the grounding function.

As a further improvement of the technical solution of the present invention, an installation gap is provided on the side wall of the conductive sleeve.

As a further improvement of the technical solution of the present invention, an annular limiting groove is formed around the peripheral side wall of the thermocouple connecting plastic cap for inserting the conductive sleeve, and a limiting flange is additionally formed at the lower end thereof. The conductive sleeve is sleeved in the above-mentioned annular limiting groove.

As a further improvement of the technical solution of the present invention, the above-mentioned conductive sleeve has a "waist drum-shaped" structure, and its sidewall is formed by innumerable arc-shaped lines extending circumferentially in sequence.

As a further improvement of the technical solution of the present invention, a first strip-shaped slit is opened on the conductive sleeve. The number of the first strip-shaped slits is set to be multiple and uniformly distributed in the circumferential direction around the peripheral side wall of the conductive sleeve.

As a further improvement of the technical solution of the present invention, a second strip-shaped slit is opened on the thermocouple connecting plastic cap. The number of the second strip-shaped slits is set to be multiple, which are uniformly distributed in the circumferential direction around the peripheral side wall of the thermocouple connection plastic cap. The limiting flange is penetrated by the second strip slit to form a plurality of elastic clamping arms, and correspondingly, a plurality of limiting notches corresponding to the elastic clamping arms are uniformly distributed around the outer side wall of the connecting bracket. When the connection part of the solenoid valve is inserted into the connection part of the thermocouple, the elastic clamping arm is placed in the limit notch.

As a further improvement of the technical solution of the present invention, there are guiding protrusions extending outward from the peripheral side wall of the thermocouple connecting plastic cap. Equipped with strip guide notch. The guide protrusions are adapted to the installation notch and pass through the installation notch.

As a further improvement of the technical solution of the present invention, introduction slopes are provided on both sides of the insertion end of the guide protrusion.

As a further improvement of the technical solution of the present invention, the above-mentioned ground wire terminal is formed by integral stamping and bending.

Compared with the traditionally designed connection structure of the double-coil solenoid valve and the thermocouple suitable for gas appliances, in the technical solution disclosed in the present invention, the ground wire terminal is sleeved on the connection bracket to conduct the connection bracket and the thermoelectric The temperature sensing shell of the thermocouple assembly is used to form a current loop between the connection part of the solenoid valve and the thermocouple assembly. On the premise of ensuring the good grounding of the thermocouple assembly, the consumption of screws and the installation process are avoided. The problem of entanglement between multiple thermocouple wires during batch assembly of the whole machine factory is solved. In this way, the input of assembly labor is greatly reduced, the installation efficiency is effectively improved, and the installation cost of gas appliances is reduced. In addition, more importantly, the ground terminal is clamped between the thermocouple connecting cap and the connecting bracket, thereby effectively ensuring the fit between the conductive sleeve of the ground terminal and the connecting bracket, ensuring that the two are electrically connected stability and reliability.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a connection structure of a dual-coil solenoid valve and a thermocouple suitable for a gas appliance in the prior art.

FIG. 2 is a schematic structural diagram of the connection structure of a double-coil solenoid valve and a thermocouple suitable for a gas appliance in the present invention.

3 is a schematic diagram of an assembly of a solenoid valve connection part, a thermocouple connection part and a ground wire terminal in the connection structure of the dual-coil solenoid valve and the thermocouple applicable to the gas appliance according to the present invention.

4 is an exploded view of the assembly of the solenoid valve connection part, the thermocouple connection part and the ground terminal in the connection structure of the double coil solenoid valve and the thermocouple applicable to the gas appliance according to the present invention.

5 is a side view of the assembly of the solenoid valve connection part, the thermocouple connection part and the ground terminal in the connection structure of the double coil solenoid valve and the thermocouple applicable to the gas appliance according to the present invention.

FIG. 6 is a cross-sectional view taken along line A-A of FIG. 5 .

FIG. 7 is a cross-sectional view taken along line B-B of FIG. 5 .

8 is a perspective view of a connection bracket in the connection structure of the double-coil solenoid valve and the thermocouple applicable to the gas appliance according to the present invention.

FIG. 9 is a schematic perspective view of the pin assembly in the connection structure of the double-coil solenoid valve and the thermocouple applicable to the gas appliance according to the present invention.

10 is a perspective view of the base in the connection structure of the double-coil solenoid valve and the thermocouple applicable to the gas appliance according to the present invention.

11 is a perspective view of the thermocouple connected to the plastic cap in the connection structure of the double-coil solenoid valve and the thermocouple applicable to the gas appliance according to the present invention.

FIG. 12 is a perspective view of another perspective view of the thermocouple connected to the plastic cap in the connection structure of the double-coil solenoid valve and the thermocouple applicable to the gas appliance according to the present invention.

13 is a schematic structural diagram of a thermocouple assembly in the connection structure of the dual-coil solenoid valve and the thermocouple applicable to the gas appliance according to the present invention.

14 is a perspective view of the ground wire terminal in the connection structure of the double-coil solenoid valve and the thermocouple applicable to the gas appliance according to the present invention.

FIG. 15 is a perspective view of the ground wire terminal in another view of the connection structure of the double-coil solenoid valve and the thermocouple applicable to the gas appliance according to the present invention.

1-solenoid valve connection part; 11-connection bracket; 111-limit notch; 112-strip guide notch; 12-pin assembly; 13-base; 2-thermocouple connection part; 21-thermocouple connection cap; 211-ring limit groove; 212-limiting flange; 2121-elastic snap-on arm; 213-second strip slot; 214-guide protrusion; 2141-introduction slope; 22-core wire terminal assembly; 3-thermoelectric Pair component; 31 - temperature sensing head element; 32 - temperature sensing shell; 4 - ground wire terminal; 41 - conductive sleeve; 411 - first slit; 412 - installation gap;

Detailed ways

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, It is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

The content of the present invention will be described in further detail below in conjunction with specific embodiments. The valve connection part 1 , the thermocouple connection part 2 , the thermocouple assembly 3 and the ground terminal 4 are composed of several parts. Wherein, the solenoid valve connecting portion 1 is arranged just below the above-mentioned thermocouple connecting portion 2, and is connected to each other by inserting.

Figure 3 and Figure 4 respectively show the schematic diagram of the assembly of the solenoid valve connection part, the thermocouple connection part and the ground terminal in the connection structure of the double coil solenoid valve and the thermocouple applicable to the gas appliance according to the present invention and its exploded view, It can be known that the solenoid valve connecting part 1 includes a connecting bracket 11 , a pin assembly 12 and a base 13 . The pin assembly 12 is built into the base 13 and is integrally inserted into the inner cavity of the connection bracket 11 . The pin assembly 12 includes main line pins and auxiliary line pins. The thermocouple connection part 2 includes a thermocouple connection cap 21 and a core wire terminal assembly 22 adapted to the above-mentioned pin assembly 12 . The core wire terminal assembly 22 is inserted and fixed in the inner cavity of the thermocouple connecting plastic cap 21, which includes a main wire terminal which is adapted and inserted with the above-mentioned main wire pins and a main wire terminal which is adapted and inserted with the above-mentioned auxiliary wire pins. Auxiliary terminal. The ground terminal 4 is composed of a conductive sleeve 41 and a wire pressing elastic piece 42 formed by the extension of the conductive sleeve 41 . The thermocouple assembly 3 includes a temperature-sensing head element 31 and a temperature-sensing shell 32 sleeved on the periphery of the temperature-sensing head element 31 , wherein the temperature-sensing head element 31 and the temperature-sensing shell 32 are respectively connected with the above-mentioned pin assemblies 12 , The wire-pressing elastic pieces 42 are electrically connected. The conductive sleeve 41 is sleeved on the outer side wall of the thermocouple connecting cap 21, and is integrally built into the inner cavity of the connecting bracket 11, so that it is always sandwiched between the thermocouple connecting cap 21 and the connecting bracket 11 to achieve Ground function (shown in Figure 5-15).

The working principle of the above-mentioned thermocouple and solenoid valve connection structure suitable for gas appliances is roughly as follows: the conductors of two different components (that is, the above-mentioned temperature sensing head element 31 and temperature sensing shell 32) are connected into a loop, and the gas appliance burns normally. During the process, there is a temperature difference between the temperature sensing head element 31 and the temperature sensing housing 32, so a thermoelectric potential is generated. At the same time, the solenoid valve connection part 1 installed in the valve seat is connected with the thermocouple connection part 2, Conduction, the thermocouple assembly 3 is kept in the grounding state, and the solenoid valve is kept in the suction state under the action of thermoelectric potential to ensure the continuous supply of gas. When an accidental flameout occurs, the temperature of the temperature sensing head element 31 and the temperature sensing housing 32 will tend to be the same, the thermocouple assembly 3 will not be able to generate thermoelectric potential, and the solenoid valve will be in a disengaged state, thereby making the gas switch to an off state.

The following beneficial effects can be produced by adopting the above technical solutions: 1) The pin assembly 12 is connected to the core wire terminal assembly 22, thereby realizing the electrical conduction between the thermocouple assembly 3 and the solenoid valve; and the ground wire terminal 4 is connected to the connecting bracket 11. Connected to form a reliable grounding of the ground terminal 4 . The existence of the ground terminal 4 can effectively achieve the purpose of forming a current loop between the solenoid valve connecting part 1 and the thermocouple assembly 3, so that the thermocouple assembly 3 has good grounding performance; 2) The ground terminal 4 is clamped against the The thermocouple is connected between the plastic cap 21 and the connection bracket 11, thereby effectively ensuring the fit between the conductive sleeve 41 of the ground terminal 4 and the connection bracket 11, ensuring the stability and reliability of electrical conduction between the two, and thus ensuring The reliability of the grounding of the thermocouple assembly 3. 3) The process of connecting the round terminal at the end of the wire to the valve body by means of screws is omitted, the consumption of screws and the installation process are avoided, the input of assembly labor is greatly reduced, the installation efficiency of gas appliances is effectively improved, and the installation cost.

As a further optimization of the connection structure of the above-mentioned dual-coil solenoid valve suitable for gas appliances and a thermocouple, a mounting notch 412 can also be opened on the side wall of the conductive sleeve 41 and penetrated along the height direction (as shown in Figure 14, 15). In this way, when the ground wire terminal 4 is sheathed on the thermocouple connecting cap 21, the presence of the above-mentioned installation notch 412 can allow the conductive sleeve 41 to be adaptively expanded along its circumferential direction, thereby effectively reducing the ground It is difficult to install the wire terminal 4, thereby improving its installation efficiency.

In order to ensure the certainty and consistency of the position of the ground wire terminal 4 relative to the thermocouple connection cap 21 and prevent it from "moving" in the actual application process, as a further optimization of the above technical solution, it is also possible to surround the thermocouple The peripheral side wall of the connecting cap 21 is provided with an annular limiting groove 211 for inserting the conductive sleeve 41, and a limiting flange 212 is additionally formed at the lower end thereof. The conductive sleeve 41 is sleeved in the above-mentioned annular limiting groove 211 (as shown in FIGS. 5 , 6 , 11 and 12 ).

Of course, the above-mentioned conductive sleeve 41 can also be designed as a "waist drum-shaped" structure, and the side walls thereof are formed by innumerable arc-shaped lines extending circumferentially in sequence (as shown in FIGS. 14 and 15 ). In this way, when the conductive sleeve 41 is clamped in the gap between the thermocouple connecting cap 21 and the connecting bracket 11, its "waist drum" structure is in a state of elastic deformation under force, thereby ensuring that the conductive sleeve 41 is always elastically deformed. It abuts on the inner side wall of the connecting bracket 11, thereby ensuring the stability and reliability of the contact between the conductive sleeve 41 and the connecting bracket 11, and preventing the occurrence of "poor contact".

It is known that, in the actual installation process, the ground wire terminal 4 is first sleeved on the thermocouple connecting cap 21 , and then the whole is inserted into the inner cavity of the connecting bracket 11 . However, due to the existence of the "waist drum-shaped" structure of the conductive sleeve 41 , it is extremely difficult to perform the insertion operation, and the conductive sleeve 41 is easily damaged to cause permanent plastic deformation. In view of this, a first strip slit 411 may also be formed on the conductive sleeve 41 . The number of the first strip-shaped slits 411 is set to be multiple, and is uniformly distributed in the circumferential direction around the peripheral sidewall of the conductive sleeve 41 (as shown in FIGS. 14 and 15 ).

However, in the actual installation process of the gas appliance, the following problem occurs: when an external force is applied, the thermocouple connection part 2 is easily dislodged from the solenoid valve connection part 1 . As a result, the electrical connection between the pin assembly 12 and the temperature sensing head element 31 and the electrical connection failure between the ground terminal 4 and the solenoid valve connecting portion 1 will inevitably occur, thereby affecting the normal use of the gas appliance. To this end, the following scheme can also be adopted to optimize the connection structure of the thermocouple and the solenoid valve of the gas appliance, and the details are as follows: a second strip-shaped slit 213 is formed on the thermocouple connection plastic cap 21 . The number of the second strip-shaped slits 213 is set to be multiple, which are uniformly distributed around the peripheral sidewall of the thermocouple connecting plastic cap 31 . The above-mentioned limiting flange 212 is penetrated by the second strip-shaped slit 213 to form a plurality of elastic clamping arms 2121. Correspondingly, a plurality of elastic clamping arms 2121 are evenly distributed around the outer side wall of the connecting bracket 11 to match the above-mentioned elastic clamping arms 2121. The limit notch 111. After the solenoid valve connecting part 1 is inserted into the thermocouple connecting part 2, the elastic clamping arm 2121 is positioned in the limiting notch 111 (as shown in Figs. 11 and 12). In this way, after the insertion of the solenoid valve connecting part 1 and the thermocouple connecting part 2 is completed, the elastic clamping arm 2121 is hooked in the limiting notch 111, thereby preventing the electromagnetic valve connecting part 1 from being relatively The thermocouple connection part 2 is disengaged, thereby ensuring the reliability and stability of the connection between the two, and ensuring that the ground terminal 4 and the connection bracket 11 are always kept in contact.

In order to ensure the "fool-proof" operation of the assembly, a guide protrusion 214 can also be extended from the peripheral side wall of the thermocouple connection cap 21. Correspondingly, the side wall of the connection bracket 11 is provided with a The strip-shaped guide notch 112 (as shown in FIGS. 3 , 5 , 8 , 11 and 12 ) is adapted to the above-mentioned guide protrusions 214 . In the actual assembly process, by rotating and adjusting the relative positional relationship between the guide protrusion 214 and the strip guide notch 112, the connection bracket 11 can be effectively ensured relative to the thermocouple connecting cap 21 and the pin assembly 12 relative to the core wire. Alignment accuracy of the terminal assembly 22 .

Of course, as a further optimization of the above technical solution, introduction slopes 2141 (as shown in FIGS. 11 and 12 ) can also be provided on both sides of the insertion end of the guide protrusion 214 , so that the guide protrusion 214 can enter the guide protrusion 214 more smoothly. The strip guide notch 112 has a certain automatic alignment function, which reduces the difficulty of assembly. Generally speaking, the inclination angle of the introduction slope 2141 is controlled at 30-45°.

In addition, it should be noted that the installation notch 412 opened on the conductive sleeve 41 is also preferably adapted to the guide protrusion 214, and after the conductive sleeve 41 is installed relative to the thermocouple connecting cap 21, the guide protrusion 214 Through the installation gap 412, the circumferential rotation limitation of the ground terminal 4 is achieved (as shown in FIG. 5).

Finally, in view of reducing the manufacturing cost of the ground wire terminal 4 and ensuring the quality of the forming, it is preferably formed by integral punching and bending (as shown in FIGS. 14 and 15 ).

The above description of the disclosed embodiments enables any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. A connection structure suitable for a double-coil solenoid valve of a gas appliance and a thermocouple, characterized in that it comprises a solenoid valve connection part, a thermocouple connection part, a thermocouple assembly and a ground terminal; the solenoid valve connection part are arranged directly below the thermocouple connection part, and are mutually inserted and connected; the solenoid valve connection part includes a connection bracket, a base and a pin assembly; the pin assembly includes a main line pin and an auxiliary line pin; The thermocouple connection part includes a thermocouple connection plastic cap and a core wire terminal assembly adapted to the pin assembly; the core wire terminal assembly is inserted and fixed in the inner cavity of the thermocouple connection plastic cap, which is It includes a main line terminal that fits and fits with the main line pin and an auxiliary line terminal that fits and fits with the auxiliary line pin; the ground line terminal is formed by a conductive sleeve and is extended by the conductive sleeve The thermocouple assembly includes a temperature-sensing head element and a temperature-sensing shell sleeved on the periphery of the temperature-sensing head element, wherein the temperature-sensing head element, the temperature-sensing head element, the temperature-sensing head element and the temperature-sensing head element The outer shell is electrically connected to the pin assembly and the wire pressing spring respectively; the conductive sleeve is sleeved on the outer side wall of the thermocouple connection plastic cap, and is integrally installed in the inner cavity of the connection bracket, so that the It is sandwiched between the thermocouple connecting cap and the connecting bracket to realize the grounding function. 2 . The connection structure of a dual-coil solenoid valve suitable for a gas appliance and a thermocouple according to claim 1 , wherein a mounting notch is provided on the side wall of the conductive sleeve. 3 . 3. The connection structure of a dual-coil solenoid valve suitable for a gas appliance and a thermocouple according to claim 2, wherein an annular limit groove is opened around the peripheral side wall of the thermocouple connection plastic cap, so as to The conductive sleeve is used to install the conductive sleeve, and a limit flange is formed at the lower end of the conductive sleeve; the conductive sleeve is sleeved in the annular limit groove. 4. The connection structure of a dual-coil solenoid valve and a thermocouple suitable for a gas appliance according to claim 3, wherein the conductive sleeve has a "waist drum-shaped" structure, and its side walls are formed by countless arcs. The lines are sequentially extended circumferentially. 5 . The connection structure of a dual-coil solenoid valve and a thermocouple suitable for a gas appliance according to claim 4 , wherein a first strip-shaped slit is formed on the conductive sleeve; The number of the slits is set to be multiple and uniformly distributed in the circumferential direction around the peripheral side wall of the conductive sleeve. 6. The connection structure of a double-coil solenoid valve suitable for a gas appliance and a thermocouple according to any one of claims 3 to 5, wherein a second connection cap is provided on the thermocouple connection cap The number of the second strip-shaped slits is set to be multiple, and circumferentially uniform distribution is carried out around the peripheral side wall of the thermocouple connecting plastic cap; the limiting flange is penetrated by the second strip-shaped slits to A plurality of elastic clamping arms are formed; correspondingly, a plurality of limit notches adapted to the elastic clamping arms are evenly distributed around the outer side wall of the connecting bracket; when the solenoid valve connecting portion is opposite to the After the insertion of the thermocouple connection part is completed, the elastic clamping arm is placed in the limiting notch. 7 . The connection structure of a dual-coil solenoid valve suitable for a gas appliance and a thermocouple according to claim 6 , wherein a guide protrusion extends outward from the peripheral side wall of the thermocouple connection plastic cap. 8 . , correspondingly, the side wall of the connecting bracket is provided with a strip-shaped guide notch that fits with the guide protrusion; the guide protrusion is matched with the installation notch and passes through the installation notch . 8 . The connection structure of a dual-coil solenoid valve and a thermocouple suitable for a gas appliance according to claim 7 , wherein introduction slopes are provided on both sides of the insertion end of the guide protrusion. 9 . 9 . The connection structure of a dual-coil solenoid valve and a thermocouple suitable for a gas appliance according to any one of claims 1 to 5 , wherein the ground terminal is integrally stamped and bent. 10 .

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