CN112810992A

CN112810992A - Full-plastic pressing pump

Info

Publication number: CN112810992A
Application number: CN202110167095.6A
Authority: CN
Inventors: 李再; 赵秦波
Original assignee: Yuyao Dandan Sprayer Co Ltd
Current assignee: Yuyao Dandan Sprayer Co Ltd
Priority date: 2021-02-07
Filing date: 2021-02-07
Publication date: 2021-05-18
Also published as: WO2022165995A1

Abstract

The application relates to an all-plastic pressing pump, which relates to the field of pumps and comprises a base made of plastic materials, wherein the base is provided with a pump cavity, a liquid inlet and a liquid outlet which are communicated with the pump cavity, the base is connected with a pressing seat in a sliding manner, and the pressing seat is connected with a piston; according to be equipped with the plastic spring between seat and base, the plastic spring includes the installation department one of being connected with the seat of pressing, the installation department two of being connected with the base, the elasticity portion of being connected installation department one and installation department two, the cross section size of installation department one, installation department two is different, the plastic spring is by TPE material integrated into one piece, unidirectional structure one, unidirectional structure two, press the seat, the piston is the plastics material. The plastic for the all-plastic pressing pump replaces parts made of metal and glass materials of the pressing pump, and is convenient for secondary recycling; the plastic spring made of TPE materials is arranged, so that the all-plastic pressing pump has the characteristics of high explosive force, high resilience force and high sealing property; the liquid inlet is sealed by a valve needle in a straight-through way, so that the all-plastic pressing pump has high sealing performance.

Description

Full-plastic pressing pump

Technical Field

The application relates to the field of pumps, in particular to an all-plastic pressing pump.

Background

The pump is a manual pump for pumping liquid, and is often used in a sprayer, a foam pump, or a container for containing an emulsion such as shampoo, etc. when the pump is used to pump liquid once.

The pressure pump has pump cavity and piston inside for pumping liquid, one-way valves set in the inlet and the outlet of the pump cavity, and when the piston is forced to move inside the pump cavity, the one-way pumping of liquid is realized via the one-way valves and the piston is reset via the spring made of metal material.

In view of the above-mentioned related art, the inventor believes that the pump body of the pressing pump is made of plastic, and the plastic component of the pressing pump is abundant, so that the plastic can be melted and recycled after being discarded. However, the spring made of metal must be separated from the plastic of the pressing pump to melt the plastic, and the defect of high recycling difficulty exists.

Disclosure of Invention

In order to reduce the degree of difficulty of pressing pump recycle, this application provides an all-plastic pressing pump.

The application provides a plastic push pump adopts following technical scheme:

an all-plastic pressing pump comprises a base made of plastic, wherein the all-plastic pressing pump is provided with a pump cavity, a liquid inlet and a liquid outlet, the liquid inlet is communicated with the pump cavity, a one-way structure I is arranged at the liquid inlet, a one-way structure II is arranged at the liquid outlet, the one-way structure I and the one-way structure II enable liquid to flow in one direction along the liquid inlet, the pump cavity and the liquid outlet, the base is connected with a pressing seat in a sliding mode, the pressing seat is connected with a piston, and the piston is connected with the cavity wall of; be equipped with the plastic spring between pressing seat and base, the plastic spring include with press the seat installation department of being connected one, with the installation department two that the base is connected, with the elastic component that installation department one and installation department two are connected, the cross section size of installation department one, installation department two is different, the plastic spring is by TPE material integrated into one piece, one-way structure one, one-way structure two, press the seat, the piston is the plastics material.

Through adopting above-mentioned technical scheme, when pressing the seat, the piston slides in the pump chamber, through one-way structure one, one-way structure two's effect, realizes the one-way pump sending to liquid, and plastic spring is used for providing the restoring force for pressing the reseing of seat. When the plastic spring is compressed, the elastic part generates deformation and generates restoring force, and the mounting part I or the mounting part II can also generate deformation to assist in generating restoring force. The plastic spring made of the TPE material has good fatigue resistance, so that the all-plastic pressing pump has the characteristics of high resilience and fatigue resistance. This plastic spring replaces traditional metal spring for plastic compression pump, and all the other parts all can be made by plastics, need not to disassemble the separation after retrieving this compression pump, can directly melt into liquid plastics, mould plastics into other products again and use, have reduced recycle's the degree of difficulty.

Optionally, the plastic spring is a cylindrical structure with two open ends and a closed side wall.

Through adopting above-mentioned technical scheme, lateral wall confined plastic spring has better waterproof, dustproof ability, and external dust, sewage are difficult for getting into in the pressure pump. On the other hand, the plastic spring has more solid parts, so that the plastic spring has higher resilience force and explosive force.

Optionally, press the valve rod of seat fixedly connected with plastics material, one of the unidirectional structure includes the needle, the needle sets up in the tip of valve rod towards the inlet, the needle can be through the slip closure or open the inlet.

Through adopting above-mentioned technical scheme, after the valve rod removed to the inlet direction, the needle inserted the inlet and seals the inlet, removed the back to the outlet direction when the valve rod, and the needle shifts up and breaks away from the inlet, makes the inlet switch on, if be the negative pressure in the pump chamber this moment, then the liquid in the pump chamber can not flow through the inlet. The valve needle and the liquid inlet are combined to form a one-way structure I, the valve needle made of plastic replaces a conventional glass ball body to be sealed, and recycling of the pressing pump is facilitated. The valve needle straight-through type sealing is adopted, so that the pressing pump has high sealing performance.

Optionally, the pressing seat is fixedly connected with a valve rod made of a plastic material, the piston is sleeved outside the valve rod and is in sliding connection with the valve rod, the pressing seat is provided with a pressing portion, the valve rod is provided with a limiting portion, the pressing portion and the limiting portion are respectively located on two sides of the piston in the sliding direction, and the pressing portion and the limiting portion limit the sliding range of the piston relative to the valve rod; the one-way structure two is including locating the intercommunication mouth of valve rod outer wall, forming the clearance between spacing portion and piston, the intercommunication mouth is with liquid outlet, clearance intercommunication, the piston can slide for the valve rod and open or close clearance.

Through adopting above-mentioned technical scheme, when the user pressed the pressure seat, splenium, valve rod moved to the pump chamber direction, because there is frictional force between piston and base, then the piston can not remove temporarily, then the valve rod removes for the piston, and the movable gap is opened, and the movable gap switches on pump chamber, liquid outlet this moment. When the valve rod slides to the direction of keeping away from the pump chamber, because there is frictional force between piston and base, then the piston can not remove temporarily, and the valve rod moves for the piston, along with the continuation removal of valve rod, spacing portion butt piston and order about the piston and remove, and the clearance closes. In summary, the one-way structure II realizes the one-way conduction function, and the one-way structure II is made of plastic materials.

Optionally, the end of the piston facing the liquid outlet is provided with a first caulking groove for inserting the pressing part, the piston is provided with a convex ring facing the pressing part, and the piston establishes sliding seal with the pressing part through the convex ring.

By adopting the technical scheme, the piston establishes sliding seal with the pressing part through the convex ring, so that when the piston slides relative to the valve rod, liquid is not easy to leak out of the pump cavity between the piston and the pressing part. Meanwhile, the pressing part is in plug-in fit with the first caulking groove, so that the stability of the pressing part driving the piston to move is improved.

Optionally, the base includes the pump body, gland, the pump chamber is located the pump body, the tip that the pump body deviates from the inlet is uncovered, the gland is located the opening department that the pump body deviates from the inlet and is fixed with the pump body, gland restriction piston and pump body separation.

By adopting the technical scheme, when the pump body is separated from the gland, the piston is convenient to disassemble and assemble; after the pump body and the gland installation are accomplished, the gland restriction piston separates with the pump body, improves the structure steadiness of pressing the pump.

Optionally, a ventilation gap is arranged between the pressing seat and the base, and an inner ventilation hole is arranged on the outer wall of the base; when the piston moves towards the liquid inlet, the ventilation gap is communicated with the inner ventilation hole through the inner cavity of the pump body, and when the piston moves towards the liquid outlet, the side wall of the piston is opposite to and seals the inner ventilation hole.

By adopting the technical scheme, after the pressing seat moves towards the direction of the pump body, the piston slides through the inner vent hole, and the outside air is communicated with the bottle through the vent gap, the inner cavity of the pump body and the inner vent hole, so that the air pressure inside and outside the bottle is balanced, and the liquid in the bottle is easy to be pumped out. When the pressing seat moves towards the direction far away from the pump body, the piston seals the inner vent hole through the side wall, air in the bottle is not communicated with the outside, and evaporation loss of liquid in the bottle is reduced.

Optionally, the piston includes a sliding sleeve connected to the valve rod, a sealing portion contacting the inner wall of the pump cavity, and a connecting portion connecting the sliding sleeve and the sealing portion, the sealing portion includes a first sealing portion close to the liquid outlet and a second sealing portion close to the liquid inlet, the outer diameter of the first sealing portion is gradually expanded towards the liquid outlet, and the outer diameter of the second sealing portion is gradually expanded towards the liquid inlet; and when the piston moves towards the liquid outlet, the inner vent hole is opposite to the space between the first sealing part and the second sealing part.

Through adopting above-mentioned technical scheme, the tip edge that sealing part one, two mutual departures from of sealing part supports tightly in pump body inner wall, forms double-deck sealed, improves sealed effect. The side wall of the piston is opposite to and seals the inner vent hole, the inner vent hole is opposite to the position between the first sealing part and the second sealing part, and the first sealing part and the second sealing part are matched with each other, so that the sealing effect on the inner vent hole is good.

Optionally, the valve rod and the valve needle are made of PP, and the piston is made of PE.

By adopting the technical scheme, the PP and PE materials are safe and nontoxic, and can be fused after being melted.

Optionally, the inner wall of the liquid inlet is circumferentially provided with a fixing protrusion.

Through adopting above-mentioned technical scheme, the inlet is used for supplying the straw to peg graft, and fixed arch is used for supporting the outer wall of tight straw, improves the steadiness of straw installation.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the plastic replaces the part of the pressing pump containing metal and glass materials, so that the secondary recycling is convenient;

2. the plastic spring made of TPE materials is arranged, so that the all-plastic pressing pump has the characteristics of high explosive force, high resilience force and high sealing property;

3. the liquid inlet is sealed by a valve needle in a straight-through way, so that the all-plastic pressing pump has high sealing performance.

Drawings

Fig. 1 is a perspective view of an all-plastic push pump according to an embodiment of the present disclosure.

Fig. 2 is an exploded view of the embodiment.

Fig. 3 is a sectional view of the embodiment.

Fig. 4 is an enlarged view of a in fig. 3.

FIG. 5 is a first state diagram of an embodiment.

FIG. 6 is a second state diagram of the embodiment.

Description of reference numerals: 1. a base; 2. a pressing seat; 3. a plastic spring; 10. a liquid inlet; 21. a liquid outlet; 11. a pump body; 12. a gland; 101. a fixed protrusion; 13. a pump chamber; 4. a piston; 22. a convex edge; 31. a first mounting part; 32. a second mounting part; 33. an elastic portion; 5. a valve stem; 51. a liquid outlet channel; 52. a valve needle; 41. a sliding sleeve; 421. a first sealing part; 422. a second sealing part; 43. a connecting portion; 23. a pressing part; 53. a limiting part; 44. a first caulking groove; 45. a second caulking groove; 411. a convex ring; 54. a communication port; 55. a clearance for movement; 231. a boss portion; 34. an outer vent; 121. a boss; 6. a vent gap; 111. an inner vent hole.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses an all-plastic pressing pump. Referring to fig. 1 and 2, the all-plastic pressing pump comprises a base 1 and a pressing base 2 slidably disposed on the base 1, wherein the base 1 is used for being fixed with a bottle, and the pressing base 2 is used for being manually pressed by a user. A plastic spring 3 made of TPE material is arranged between the pressing seat 2 and the base 1, and the elastic force of the plastic spring 3 drives the pressing seat 2 to be far away from the base 1. Base 1, press seat 2, plastic spring 3 to be the cylinder, and the axis coincidence of three, and base 1 deviates from the tip of pressing seat 2 and is equipped with inlet 10, and the tip that presses seat 2 to deviate from base 1 is equipped with liquid outlet 21.

Referring to fig. 2 and 3, the base 1 includes a pump body 11 and a gland 12, the pump body 11 is hollow, and the liquid inlet 10 is disposed in the pump body 11. The outer end of inlet 10 is used for supplying the straw to peg graft, and the inner wall of inlet 10 is equipped with fixed protrusion 101 along circumference, and fixed protrusion 101 is the back-off formula, and fixed protrusion 101 is used for supporting the outer wall of tight straw, improves the steadiness of straw installation.

The liquid inlet 10 is communicated with the inner cavity of the pump body 11, and the part of the hollow part of the pump body 11 close to the liquid inlet 10 is a pump cavity 13. The end part of the pump body 11 departing from the liquid inlet 10 is open, the gland 12 is positioned at the opening of the pump body 11 departing from the liquid inlet 10, the gland 12 partially extends into the pump body 11, and the gland 12 and the pump body 11 are fixed through clamping. A piston 4 is arranged in a pump body 11 in a sliding mode, the sliding direction of the piston 4 is along the length direction of a base 1, the piston 4 is in sliding contact with the inner wall of the pump body 11 through the outer side wall and establishes sliding seal, a pump cavity 13 is located between the piston 4 and a liquid inlet 10, after the piston 4 and a gland 12 are sequentially installed on the pump body 11, the gland 12 protrudes out of the inner wall of the pump body 11, and the gland 12 limits the piston 4 to be separated from the pump body 11.

Referring to fig. 3, the plastic spring 3 has a cylindrical structure with both ends open and a side wall closed. Outside the plastic spring 3 cover was located and is pressed seat 2, pressed seat 2 and deviated from the integrative chimb 22 that is fixed with of tip of base 1, plastic spring 3's both ends butt chimb 22, gland 12 respectively. The plastic spring 3 comprises a first mounting part 31 connected with the pressing seat 2, a second mounting part 32 connected with the base 1 and an elastic part 33 connecting the first mounting part 31 and the second mounting part 32, the cross section size of the first mounting part 31 is smaller than that of the second mounting part 32, and the diameter of the second mounting part 32 is further gradually enlarged along the direction departing from the first mounting part 31. The plastic spring 3 is integrally formed by a TPE material, and when the plastic spring 3 is compressed, the elastic portion 33 is deformed to generate a restoring force, and the second mounting portion 32 is also deformed to assist in generating the restoring force. The plastic spring 3 made of the TPE material is soft in touch, has good fatigue resistance and temperature resistance, and the side wall of the plastic spring 3 is sealed, so that the all-plastic press pump has the characteristics of high resilience, high sealing property and fatigue resistance.

A valve rod 5 made of plastic material is arranged in the pressing seat 2 in a penetrating way. The axis of the valve rod 5 coincides with the axis of the pressing seat 2, the end part of the valve rod 5 penetrates through the gland 12 and then extends into the pump body 11, the outer wall of the valve rod 5 and the pressing seat 2 are clamped and fixed, and the liquid outlet channel 51 arranged in the valve rod 5 is communicated with the liquid outlet 21. The base 1 is internally provided with a one-way structure I and a one-way structure II, and the one-way structure I and the one-way structure II enable liquid to flow in a one-way mode along the liquid inlet 10, the pump cavity 13 and the liquid outlet 21.

The first one-way structure is close to the liquid inlet 10, the first one-way structure comprises a valve needle 52 integrally fixed with the valve rod 5, the valve needle 52 is fixed at the end part of the valve rod 5 facing the liquid inlet 10, and when the valve rod 5 slides along with the pressing seat 2, the valve needle 52 can close or open the liquid inlet 10 through sliding. When the pressing seat 2 overcomes the elasticity of the plastic spring 3 and moves towards the pump body 11, the valve needle 52 is inserted into the liquid inlet 10 and seals the liquid inlet 10; when the pressing seat 2 moves to the limit position in the direction away from the pump body 11, the end of the valve needle 52 just separates from the pump body 11 to conduct the liquid inlet 10 and the pump cavity 13.

Referring to fig. 4, the piston 4 includes a sliding sleeve 41 connected to the valve rod 5, a sealing portion contacting an inner wall of the pump chamber 13, and a connecting portion 43 connecting the sliding sleeve 41 and the sealing portion, and the piston 4 is slidably fitted to the valve rod 5 by the sliding sleeve 41 while being fitted to the outside of the valve rod 5. A pressing part 23 is integrally fixed at the end part of the pressing seat 2 facing the pump cavity 13, and the pressing part 23 annularly surrounds the circumferential side wall of the valve rod 5; the end part of the valve rod 5 close to the pump cavity 13 is integrally fixed with a limiting part 53, and the limiting part 53 protrudes out of the side wall of the valve rod 5 along the circumferential direction of the valve rod 5. The pressing portion 23 and the stopper portion 53 are located on both sides of the piston 4 in the sliding direction, and the pressing portion 23 and the stopper portion 53 restrict the range of sliding of the piston 4 with respect to the valve rod 5, so that only a small relative sliding movement is possible between the piston 4 and the valve rod 5.

The end of the piston 4 facing the liquid outlet 21 is provided with a first caulking groove 44 into which the pressing part 23 is inserted, and the first caulking groove 44 is a ring groove. When the piston 4 slides relative to the valve rod 5, the pressing part 23 is in sliding contact with the groove wall of the first caulking groove 44; when the pressing part 23 moves towards the pump cavity 13, the end part of the pressing part 23 abuts against the bottom of the first caulking groove 44 and pushes the piston 4 to move, and the matching of the pressing part 23 and the first caulking groove 44 improves the sliding stability of the piston 4. The end part of the piston 4 facing the liquid inlet 10 is provided with a second caulking groove 45 for inserting the limiting part 53, the second caulking groove 45 is also a ring groove, and the limiting part 53 is bent towards the second caulking groove 45. When the valve rod 5 moves towards the liquid outlet 21, the sliding stability of the piston 4 is improved by the matching of the limiting part 53 and the second caulking groove 45.

The outer side wall of the sliding sleeve 41 is provided with a convex ring 411 facing the pressing part 23, the convex ring 411 and the sliding sleeve 41 are integrally formed, and the piston 4 is abutted against the pressing part 23 through the convex ring 411, so that sliding sealing is established between the piston 4 and the pressing part 23. The sealing portion comprises a first sealing portion 421 close to the liquid outlet 21 and a second sealing portion 422 close to the liquid inlet 10, the outer diameter of the first sealing portion 421 gradually expands towards the direction of the liquid outlet 21, and the outer diameter of the second sealing portion 422 gradually expands towards the direction of the liquid inlet 10. The end edges of the first sealing part 421 and the second sealing part 422 which deviate from each other abut against the inner wall of the pump body 11 to form double-layer sealing, and the sealing effect is improved. The sealing part is matched with the convex ring 411, so that sliding sealing structures are formed between the piston 4 and the pressing part 23 and between the piston 4 and the pump body 11, and liquid in the pump cavity 13 cannot leak to the other side of the piston 4.

Referring to fig. 3 and 4, the second unidirectional structure is arranged between the piston 4 and the valve rod 5. The second one-way structure comprises a communication port 54 arranged on the outer wall of the valve rod 5 and a movable gap 55 formed between the limiting part 53 and the piston 4, the communication port 54 is positioned close to the limiting part 53, and the communication port 54 communicates the liquid outlet channel 51 and the movable gap 55. The movable gap 55 is switched to be opened and closed by the relative sliding of the piston 4 and the valve rod 5, and when the piston 4 abuts against the limit part 53 through the sliding sleeve 41, the movable gap 55 is closed; when the slide sleeve 41 is separated from the stopper 53, the movable gap 55 is opened, and the movable gap 55 communicates the pump chamber 13 and the communication port 54.

The outer wall of the pressing portion 23 is integrally formed with a protrusion 231, the protrusion 231 is located on a side of the gland 12 facing the pump chamber 13, and the protrusion 231 provides resistance to the pressing portion 23 passing through the gland 12. Under the elastic force of the plastic spring 3, the pressing base 2 tends to be pulled out of the base 1, and the cooperation of the protruding part 231 and the pressing cover 12 is used for limiting the pressing part 23 to be separated from the base 1.

The outer wall of the plastic spring 3 is provided with an outer vent hole 34, the outer vent hole 34 is positioned at the end part of the second mounting part 32 close to the gland 12, and the outer vent hole 34 communicates the inner wall and the outer wall of the plastic spring 3. The end face of the gland 12 facing the plastic spring 3 is provided with a boss 121, the outer side wall of the boss 121 is close to the outer vent hole 34, and the height of the boss 121 protruding out of the end face of the pump body 11 is higher than that of the outer vent hole 34. A ventilation gap 6 is arranged between the pressing seat 2 and the pressing cover 12, the ventilation gap 6 penetrates through the two ends of the pressing cover 12, and the ventilation gap 6 is communicated with the air outside the plastic spring 3 through an external ventilation hole 34. The outer wall of pump body 11 is equipped with interior air vent 111, and interior air vent 111 runs through to pump body 11 inner wall. The positions of the inner vent holes 111 are set as follows: when the piston 4 moves towards the liquid inlet 10, the vent gap 6 is communicated with the inner vent hole 111 through the inner cavity of the pump body 11; after the piston 4 moves towards the liquid outlet 21, the side wall of the piston 4 faces and seals the inner vent hole 111, the inner vent hole 111 faces the position between the first sealing part 421 and the second sealing part 422, and the first sealing part 421 and the second sealing part 422 are matched to achieve a good sealing effect on the inner vent hole 111.

In terms of materials, the valve rod 5, the valve needle 52 and the gland 12 are made of PE, particularly HDPE; the pump body 11 and the pressing base 2 are made of PP; the piston 4 is made of PE material, in particular LDPE. The plastic parts of the pressing pump can be melted together after being melted.

The implementation principle of the all-plastic pressing pump of the embodiment of the application is as follows: referring to fig. 5, during installation, a suction pipe is inserted into the liquid inlet 10, a spray nozzle is installed at the liquid outlet 21, and the pressing pump is installed at a bottle through the pump body 11, wherein the plastic spring 3 and the outer vent hole 34 are located outside the bottle, the inner vent hole 111 is located inside the bottle, and the liquid outlet 21 is located right above the liquid inlet 10. The closed plastic spring 3 has better waterproof and dustproof capabilities, and external dust and sewage are not easy to enter the pressing pump; the boss 121 can also prevent dust and sewage from entering the pressing pump through the outer vent hole 34.

When a user does not operate the pressing pump, the piston 4 seals the inner vent hole 111 through the side wall, air in the bottle is not communicated with the outside, evaporation loss of liquid in the bottle is reduced, and the liquid cannot leak out of the pressing pump through the inner vent hole 111 when the bottle is inverted. The piston 4 abuts against the stopper 53 to close the movable gap 55, and the pump chamber 13 is filled with liquid.

Referring to fig. 6, when the user pushes the push base 2 downward, the push portion 23 and the valve rod 5 move downward, and the piston 4 does not move temporarily due to the friction between the piston 4 and the cylinder 11, and the valve rod 5 moves downward relative to the piston 4, and the movable gap 55 is opened. After the valve rod 5 moves downwards, the valve needle 52 is inserted into the liquid inlet 10, the valve needle 52 closes the liquid inlet 10, the pressing part 23 starts to drive the piston 4 to move along with the continuous downward movement of the pressing seat 2, the space of the pump cavity 13 is compressed, and the liquid in the pump cavity 13 is discharged out through the movable gap 55, the communication port 54, the liquid outlet channel 51 and the liquid outlet 21, so that the pumping of the liquid is completed. After the pressing seat 2 is pressed to the bottom, the outside air is communicated with the bottle through the outer vent hole 34, the inner cavity of the plastic spring 3, the vent gap 6, the inner cavity of the pump body 11 and the inner vent hole 111, so that the air pressure inside and outside the bottle is balanced.

Referring to fig. 5 and 6, when the user releases the pressing base 2, the elastic force of the plastic spring 3 drives the pressing base 2 to move upward and return. In the process of moving the valve rod 5 upwards, because friction force exists between the piston 4 and the pump body 11, the piston 4 cannot move temporarily, the valve rod 5 moves upwards relative to the piston 4, and along with the continuous upward movement of the valve rod 5, the limiting part 53 abuts against the piston 4 and drives the piston 4 to move upwards, and the movable gap 55 is closed; when the needle 52 moves upwards to be separated from the liquid inlet 10, the liquid in the suction pipe is sucked into the pump chamber 13 to be stored under the action of the negative pressure in the pump chamber 13, and waits for the next pressing.

The pressing pump can be used for emulsion pumps, spray pumps, foam pumps and the like according to different application occasions and different matched spray heads.

The plastic spring 3 for the all-plastic pressing pump replaces a traditional metal spring, the valve needle 52 replaces a glass ball to realize one-way sealing, the one-way structure I and the one-way structure II are made of plastic, and the whole pressing pump is made of plastic. The press pump is recycled without disassembly and separation, and the plastic can be directly melted into liquid plastic and injected into other products again for use, so that the recycling difficulty is reduced. Compared with the existing pressing pump, all the components containing formaldehyde are replaced by PE materials, so that the pressing pump is environment-friendly and non-toxic.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. An all-plastic pressing pump comprises a base (1) made of a plastic material, wherein the all-plastic pressing pump is provided with a pump cavity (13), a liquid inlet (10) and a liquid outlet (21) which are communicated with the pump cavity (13), a one-way structure I is arranged at the liquid inlet (10), a one-way structure II is arranged at the liquid outlet (21), the one-way structure I and the one-way structure II enable liquid to flow in one direction along the liquid inlet (10), the pump cavity (13) and the liquid outlet (21), the base (1) is connected with a pressing base (2) in a sliding mode, the pressing base (2) is connected with a piston (4), and the piston (4) is connected with the cavity wall of the pump cavity (; the method is characterized in that: be equipped with plastic spring (3) between according to pressing seat (2) and base (1), plastic spring (3) include with the installation department one (31) of pressing seat (2) to be connected, installation department two (32) of being connected with base (1), elastic component (33) of being connected installation department one (31) and installation department two (32), the cross sectional dimension of installation department one (31), installation department two (32) is different, plastic spring (3) are by TPE material integrated into one piece, one-way structure one, one-way structure two, press seat (2), piston (4) and be the plastics material.

2. The all-plastic push pump according to claim 1, wherein: the plastic spring (3) is of a cylindrical structure with two open ends and a closed side wall.

3. The all-plastic push pump according to claim 1, wherein: according to valve rod (5) of seat (2) fixedly connected with plastics material, one-way structure includes needle (52), needle (52) set up in valve rod (5) towards the tip of inlet (10), needle (52) can be through sliding closure or open inlet (10).

4. The all-plastic push pump according to claim 1, wherein: the pressing seat (2) is fixedly connected with a valve rod (5) made of a plastic material, the piston (4) is sleeved outside the valve rod (5) and is in sliding connection with the valve rod (5), the pressing seat (2) is provided with a pressing part (23), the valve rod (5) is provided with a limiting part (53), the pressing part (23) and the limiting part (53) are respectively located on two sides of the piston (4) in the sliding direction, and the pressing part (23) and the limiting part (53) limit the sliding range of the piston (4) relative to the valve rod (5); the one-way structure II comprises a communication opening (54) arranged on the outer wall of the valve rod (5) and a movable gap (55) formed between the limiting portion (53) and the piston (4), the communication opening (54) is used for communicating the liquid outlet (21) with the movable gap (55), and the piston (4) can slide relative to the valve rod (5) to open or close the movable gap (55).

5. The all-plastic push pump according to claim 4, wherein: the end part, facing the liquid outlet (21), of the piston (4) is provided with a first caulking groove (44) for inserting the pressing part (23), the piston (4) is provided with a convex ring (411) facing the pressing part (23), and the piston (4) establishes sliding seal with the pressing part (23) through the convex ring (411).

6. The all-plastic push pump according to claim 1, wherein: base (1) is including the pump body (11), gland (12), pump chamber (13) are located the pump body (11), the tip that the pump body (11) deviates from inlet (10) is uncovered, gland (12) are located the opening department that the pump body (11) deviates from inlet (10) and are fixed with the pump body (11), gland (12) restriction piston (4) and the separation of the pump body (11).

7. The all-plastic push pump according to claim 1, wherein: a ventilation gap (6) is arranged between the pressing seat (2) and the base (1), and an inner ventilation hole (111) is formed in the outer wall of the base (1); when the piston (4) moves towards the liquid inlet (10), the ventilation gap (6) is communicated with the inner ventilation hole (111) through the inner cavity of the pump body (11), and when the piston (4) moves towards the liquid outlet (21), the side wall of the piston (4) is opposite to and seals the inner ventilation hole (111).

8. The all-plastic push pump according to claim 7, wherein: the piston (4) comprises a sliding sleeve (41) connected with the valve rod (5), a sealing part contacted with the inner wall of the pump cavity (13) and a connecting part (43) connecting the sliding sleeve (41) with the sealing part, the sealing part comprises a first sealing part (421) close to the liquid outlet (21) and a second sealing part (422) close to the liquid inlet (10), the outer diameter of the first sealing part (421) is gradually expanded towards the direction of the liquid outlet (21), and the outer diameter of the second sealing part (422) is gradually expanded towards the direction of the liquid inlet (10); when the piston (4) moves towards the liquid outlet (21), the inner vent hole (111) is opposite to the space between the first sealing part (421) and the second sealing part (422).

9. The all-plastic push pump according to claim 3, wherein: the valve rod (5) and the valve needle (52) are made of PP, and the piston (4) is made of PE.

10. The all-plastic push pump according to claim 1, wherein: the inner wall of the liquid inlet (10) is provided with a fixing bulge (101) along the circumferential direction.