CN214999631U

CN214999631U - Valve core non-return explosion-proof valve

Info

Publication number: CN214999631U
Application number: CN202121055298.8U
Authority: CN
Inventors: 刘向民; 李鹏飞; 余海龙
Original assignee: Dongguan Puw Eptfe Material Co ltd
Current assignee: Dongguan Puw Eptfe Material Co ltd
Priority date: 2021-05-17
Filing date: 2021-05-17
Publication date: 2021-12-03
Anticipated expiration: 2031-05-17

Abstract

The utility model discloses a valve core non-return explosion-proof valve, which comprises a valve body, a piston, a guide rod and a spring, wherein the guide rod is arranged in the valve body in a penetrating way and is connected with the piston; the spring is sleeved on the periphery of the guide rod and is arranged between the valve body and the guide rod; the piston and the guide rod are distributed on two sides of the valve body, the piston is tightly attached to the valve body under the elastic force action of the spring, and a plurality of axially distributed check ring grooves are formed in the periphery of the guide rod; an elastic clamping wire capable of elastically deforming is arranged in the valve body, and the upper end of the guide rod penetrates through the elastic clamping wire; after the guide arm rebound, this elasticity card silk card imbeds in this guide arm outlying check ring groove, makes the guide arm can not reset, makes to form the clearance between piston and the valve body with the pressure release, the utility model provides a current spring control explosion-proof valve opens many times and causes the drawback of performance reduction, realizes that piston and guide arm stop the fall back after opening for the first time, and quick timely pressure release that can the at utmost guarantees continuation and the stability of explosion-proof pressure release effect.

Description

Valve core non-return explosion-proof valve

The technical field is as follows:

the utility model relates to an explosion-proof valve technical field refers in particular to a case non return explosion-proof valve.

Background art:

with the continuous and rapid development of the new energy automobile industry, the holding capacity of new energy automobiles in China is also rapidly increased, and the safety and the working reliability of the new energy automobiles serving as core power batteries PACK of the new energy electric automobiles are of great importance. In order to ensure the safe and stable operation of the battery pack, the battery pack needs to be waterproof and dustproof, namely the battery pack needs to be sealed. However, in a completely sealed state, once the battery is abnormally out of control due to heat such as short circuit, overcharge or overdischarge, a large amount of high temperature and high pressure are generated, and a large amount of solid-gas mixture containing solid or colloidal substances is additionally generated, if the solid-gas mixture cannot be discharged in time, a serious fire or severe explosion is usually caused, and serious casualties and property loss are caused. Currently, it is common practice to install 1 or more anti-explosion vent valves on a battery pack to prevent abnormal explosion due to thermal runaway of the battery pack, and provide escape opportunities for personnel, thereby reducing loss of personnel and property due to explosion of the battery pack. Similar problems exist in some sealed boxes with large capacitors and energy storage batteries inside and sealed containers and storage tanks with flammable and combustible chemicals, and explosion-proof valves need to be installed on the sealed boxes or the containers.

The working principle of the spring-controlled explosion-proof valve in the prior art is that the opening exhaust pressure of an explosion-proof valve core is controlled by a precise spring, but when a battery pack is out of thermal control, short-circuit blasting of one battery core usually involves the continuous blasting of the whole module or a plurality of modules, and the explosion-proof valve core can continuously perform the actions of opening and falling for many times; because the high-temperature colloidal adhesive substance can be rapidly sprayed after the electric core is exploded, the problem that the explosion-proof valve core is opened again or the opening height is reduced after the electric core is attached to the spring or the piston is influenced, and the exhaust effect of the explosion-proof valve in the whole thermal runaway process is influenced.

In view of the above, the present inventors propose the following.

The utility model has the following contents:

an object of the utility model is to overcome prior art not enough, provide a case non return explosion-proof valve.

In order to solve the technical problem, the utility model discloses a following technical scheme: the valve core non-return explosion-proof valve comprises a valve body, a piston, a guide rod and a spring, wherein the guide rod is arranged in the valve body in a penetrating way and is connected with the piston; the spring is sleeved on the periphery of the guide rod and is arranged between the valve body and the guide rod; the piston and the guide rod are distributed on two sides of the valve body, the piston is tightly attached to the valve body under the elastic force action of the spring, and a plurality of axially distributed check ring grooves are formed in the periphery of the guide rod; an elastic clamping wire capable of elastically deforming is arranged in the valve body, and the upper end of the guide rod penetrates through the elastic clamping wire; when the guide rod moves upwards, the elastic clamping wire clamp is embedded into the non-return ring groove on the periphery of the guide rod, so that the guide rod cannot reset, and a gap is formed between the piston and the valve body to release pressure.

Further, in the above technical solution, the valve body is provided with a through center hole; the guide rod penetrates through the central hole, and a first step groove and a second step groove are formed in an opening at the upper end of the central hole; the elastic clamping wire is arranged in the first step groove and is in an elastic tight state; a clamping wire fixing ring is fixed in the second stepped groove and is covered above the elastic clamping wire to prevent the elastic clamping wire from separating from the first stepped groove.

Furthermore, in the above technical scheme, the elastic clamping wire includes a main body for being clamped with the check ring groove, and a first elastic arm and a second elastic arm which are formed in a turning manner and are arranged at two ends of the main body for being clamped.

Further, in the above technical solution, the elastic clamping wire is formed by bending a metal wire, and the cross section of the elastic clamping wire is circular, elliptical or rectangular.

Furthermore, in the above technical solution, the elastic clip wire includes an annular main body and a plurality of metal clips integrally formed on the inner side of the annular main body and used for being inserted into the check ring groove, and the metal clips are inclined with respect to the annular main body.

Further, in the above technical solution, the guide rod is axially provided with a through hole, and an inner wall of an end of the through hole is formed with an internal thread; the thread section formed at the lower end of the piston is spirally fixed with the internal thread of the guide rod, and the through hole and the air vent of the piston form a ventilation channel; and a waterproof breathable film is also fixed on the piston and covers the breathable holes.

Further, in the above technical scheme, a third step groove is formed in the piston, the waterproof breathable film is arranged in the third step groove, a film fixing ring is further fixed in the third step groove, and the outer edge of the waterproof breathable film is pressed by the film fixing ring.

Further, in the above technical solution, the piston is further provided with an iron plate and an upper cover, the iron plate is disposed at the upper end of the diaphragm fixing ring, and the upper cover is disposed at the upper end of the iron plate.

Furthermore, in the above technical scheme, a protecting sleeve is fixed at the lower end of the valve body, and the protecting sleeve is also sleeved on the periphery of the guide rod.

Further, among the above-mentioned technical scheme, the shaping of valve body lower extreme has the boss, on this boss was established to protective sheath upper end cover to form the fastening assembly through interference fit.

After the technical scheme is adopted, compared with the prior art, the utility model has following beneficial effect: the utility model discloses when using, install on sealed box, pressure when in the sealed box sharply risees, and be greater than the utility model discloses when predetermineeing explosion-proof opening pressure, the piston is influenced by internal pressure and is opened together with the lifting of guide arm, make and form the clearance with the pressure release between piston and the valve body, it falls in the check annular to receive self elasticity to paste the guide arm tightly because of elasticity card silk this moment, and hold the location with the check annular card of guide arm, thereby can prevent the piston to descend when exhaust pressure release is accomplished, fall back and reset, in order to guarantee follow-up exhaust pressure release that can last stable, solve the drawback that current spring control explosion-proof valve opened many times and cause the performance reduction, realize that piston and guide arm prevent to fall back after opening for the first time, can the biggest quick in time pressure release, guarantee continuation and the stability of explosion-proof pressure release effect. Meanwhile, the problem that the pressure relief effect is poor due to the fact that the piston is opened and clamped, cannot be opened again or the opening height is reduced when the battery pack is continuously detonated for multiple times in a thermal runaway state can be effectively solved. The utility model discloses simple structure, equipment convenience, can adopt stainless steel or aluminum material to make, can batch production, with low costs, have fine social and economic benefits.

Description of the drawings:

fig. 1 is a perspective view of the present invention;

fig. 2 is a perspective view of another perspective of the present invention;

fig. 3 is an exploded perspective view of the present invention;

fig. 4 is a cross-sectional view of the present invention;

fig. 5 is a cross-sectional view of a valve body of the present invention;

FIG. 6 is a perspective view of a first structure of the elastic clip of the present invention;

FIG. 7 is a perspective view of a second structure of the elastic clip of the present invention;

FIG. 8 is a perspective view of a third structure of the elastic clip of the present invention;

fig. 9 is a perspective view of the elastic clip with the fourth structure of the present invention.

The specific implementation mode is as follows:

the present invention will be further described with reference to the following specific embodiments and accompanying drawings.

As shown in fig. 1-9, the valve core check explosion-proof valve comprises a valve body 1, a piston 2, a guide rod 3 and a spring 4, wherein the guide rod 3 is arranged in the valve body 1 in a penetrating manner and is connected with the piston 2; the spring 4 is sleeved on the periphery of the guide rod 3 and is arranged between the valve body 1 and the guide rod 3; the piston 2 and the guide rod 3 are distributed on two sides of the valve body 1, and the piston 2 is tightly attached to the valve body 1 under the elastic force of the spring 4, so that the sealing effect is achieved, and the dustproof and waterproof functions are achieved; in order to further improve the sealing effect, a first sealing ring 13 is additionally arranged at the upper end of the valve body 1, when the piston 2 is tightly attached to the valve body 1, the piston 2 is pressed on the first sealing ring 13, so that the first sealing ring 13 is deformed, and the sealing effect between the valve body 1 and the piston 2 is more ideal.

A plurality of axially distributed check ring grooves 31 are formed in the periphery of the guide rod 3, and the overall dimension characteristics such as the width, the depth, the angle and the density of the different check ring grooves 31 can be flexibly designed according to different product requirements; an elastic clamping wire 5 capable of elastically deforming is arranged in the valve body 1, and the upper end of the guide rod 3 penetrates through the elastic clamping wire 5; when the guide rod 3 moves upwards, the elastic clamping wire 5 is clamped and embedded in the check ring groove 31 on the periphery of the guide rod 3, so that the guide rod 3 cannot reset, and a gap is formed between the piston 2 and the valve body 1 to release pressure. Particularly, the utility model discloses when using, install on sealed box, pressure in the sealed box sharply risees, and be greater than the utility model discloses when predetermineeing explosion-proof opening pressure, the piston is influenced by internal pressure and is opened together with the lifting of guide arm, make and form the clearance with the pressure release between piston 2 and the valve body 1, it falls in check annular 31 because of elastic clamping silk 5 pastes tight guide arm 3 of self elasticity this moment, and hold the location with the check annular 31 card of guide arm 3, thereby can prevent the piston to descend when exhaust pressure release is accomplished, fall back and reset, in order to guarantee follow-up exhaust pressure release that can last stable, solve the drawback that current spring control explosion-proof valve opened many times and cause the performance to reduce, realize that piston and guide arm prevent to fall back after opening for the first time, can maximum quick timely pressure release, guarantee lasting and the stability of explosion-proof effect. Meanwhile, the problem that the pressure relief effect is poor due to the fact that the piston is opened and clamped, cannot be opened again or the opening height is reduced when the battery pack is continuously detonated for multiple times in a thermal runaway state can be effectively solved. The utility model discloses simple structure, equipment convenience, can adopt stainless steel or aluminum material to make, can batch production, with low costs, have fine social and economic benefits.

The valve body 1 is provided with a through central hole 11 and an exhaust port 10 positioned on the periphery of the central hole 11, and when the piston 2 is tightly attached to the valve body 1, the piston 2 can completely block the exhaust port 10; when the guide rod 3 moves upwards, the piston 2 is not tightly attached to the valve body 1 any more, so that a gap is formed between the piston 2 and the valve body 1, and the exhaust port 10 is communicated with the outside, thereby achieving the purpose of exhausting and relieving pressure.

The guide rod 3 is arranged in the central hole 11 in a penetrating manner, and a first step groove 111 and a second step groove 112 are arranged at the opening of the upper end of the central hole 11; the elastic clamping wire 5 is arranged in the first step groove 111, is in an elastic tight state and can also elastically deform; the second step groove 112 is fixed with a wire fixing ring 12, and the wire fixing ring 12 is covered on the elastic wire 5 to prevent the elastic wire 5 from separating from the first step groove 111. Specifically, the wire fixing ring 12 is fixed in the second stepped groove 112 by interference or riveting, and the depth of the first stepped groove 111 is slightly greater than the thickness of the elastic wire 5, so as to prevent the elastic wire 5 from axially disengaging, without affecting the transverse movement.

The elastic clamping wire 5 has various different shape structures:

the first shape structure: as shown in fig. 6, the elastic clamping wire 5 is formed by bending a metal wire, and the cross section of the elastic clamping wire is circular; specifically, the elastic clip wire 5 includes a holding main body 51 for holding the check ring groove 31, and a first elastic arm 52 and a second elastic arm 53 formed at two ends of the holding main body 51 in an inverted manner, and the holding main body 51 is shaped like a U. In assembly, after the elastic wire 5 is fitted into the first stepped groove 111, the catching body 51 is disposed at the outer periphery of the guide bar 3, and the first and second

elastic arms

52 and 53 are in contact with the inner walls of the first stepped groove 111, respectively. When the guide rod 3 moves upward, the holding main body 51 of the elastic clamping wire 5 is inserted into the check ring groove 31 at the periphery of the guide rod 3, so that the guide rod 3 cannot be reset, and a gap is formed between the piston 2 and the valve body 1 to release pressure.

The second shape structure: as shown in fig. 7, the elastic clamping wire 5 is formed by bending a metal wire, and the section of the elastic clamping wire is rectangular; specifically, the elastic clamping wire 5 includes a clamping main body 51 for clamping with the check ring groove 31, and a first elastic arm 52 and a second elastic arm 53 formed at two ends of the clamping main body 51 in an inverted manner, and the clamping main body 51 is C-shaped. In assembly, after the elastic wire 5 is fitted into the first stepped groove 111, the catching body 51 is disposed at the outer periphery of the guide bar 3, and the first and second

elastic arms

The third shape structure: as shown in fig. 8, the elastic clamping wire 5 is formed by bending a metal wire, and the cross section of the elastic clamping wire is oval; specifically, the elastic clamping wire 5 includes a clamping main body 51 for clamping with the check ring groove 31, and a first elastic arm 52 and a second elastic arm 53 formed at two ends of the clamping main body 51 in an inverted manner, and the clamping main body 51 is in a semi-square frame shape with two inclined sides. In assembly, after the elastic wire 5 is fitted into the first stepped groove 111, the catching body 51 is disposed at the outer periphery of the guide bar 3, and the first and second

elastic arms

The fourth shape structure: as shown in fig. 9, the elastic clamping wire 5 is formed by punching a metal sheet; specifically, the elastic clip 5 includes an annular main body 54 and a plurality of metal clips 55 integrally formed inside the annular main body 54 and adapted to be inserted into the check ring groove 31, wherein the metal clips 55 are inclined with respect to the annular main body 54. In assembly, after the elastic clip 5 is fitted into the first stepped groove 111, the annular body 54 and the metal clip 55 are disposed around the guide bar 3, and the outer periphery of the annular body 54 is in contact with the inner walls of the first stepped groove 111, respectively. When the guide rod 3 moves upwards, the annular main body 54 of the elastic clamping wire 5 is clamped and embedded in the check ring groove 31 on the periphery of the guide rod 3, so that the guide rod 3 cannot be reset, and a gap is formed between the piston 2 and the valve body 1 to release pressure.

The guide rod 3 is axially provided with a through hole 32, and the through hole 32 and the air hole 21 of the piston 2 form an air passage. And a waterproof breathable film 6 is further fixed on the piston 2, and the waterproof breathable film 6 covers the breathable holes 21.

An internal thread 321 is formed on the inner wall of the end part of the through hole 32; the thread section formed at the lower end of the piston 2 is spirally fixed with the internal thread 321 of the guide rod 3 to form stable assembly, and the assembly and disassembly are very convenient.

The piston 2 is provided with a third step groove 22, the waterproof breathable film 6 is arranged in the third step groove 22, a film fixing ring 61 is further fixed in the third step groove 22, and the outer edge of the waterproof breathable film 6 is pressed by the film fixing ring 61. The membrane fixing ring 61 can be fixed in the third stepped groove 22 in an interference fit mode, and the waterproof breathable film 6 is stably assembled on the piston 2.

The piston 2 is further provided with an iron sheet 7 and an upper cover 8, the iron sheet 7 is arranged at the upper end of the diaphragm fixing ring 61, the upper cover 8 is arranged at the upper end of the iron sheet 7, the upper cover 8 is also in contact with the upper end of the piston 2 and is adhered through glue, and the waterproof breathable film 6 is protected.

The lower end of the valve body 1 is fixed with a protective sleeve 9, and the protective sleeve 9 is further sleeved on the periphery of the guide rod 3, so that foreign matters are prevented from entering the guide rod 3 and the spring 4, and the guide rod 3 and the spring 4 can be guaranteed to move stably.

The valve comprises a valve body 1 and is characterized in that a boss 14 is formed at the lower end of the valve body 1, the boss 14 is sleeved on the upper end of a protective sleeve 9, and fastening assembly is formed through interference fit.

The lower end of the valve body 1 is provided with a second sealing ring 15, and the second sealing ring 15 is used for contacting with a sealing box body to realize the sealing effect.

The lower end of the valve body 1 is provided with a plurality of thread grooves 16, and the utility model is fixed on the sealing box body by matching screws with the thread grooves 16.

To sum up, the utility model discloses when using, install on sealed box, pressure when in the sealed box sharply risees, and be greater than the utility model discloses when predetermineeing explosion-proof opening pressure, the piston is influenced by internal pressure and is opened together with the lifting of guide arm, make and form the clearance with the pressure release between piston 2 and the valve body 1, this moment because of elasticity card silk 5 receives self elasticity to paste tight guide arm 3 and fall in check annular 31, and hold the location with the check annular 31 card of guide arm 3, thereby can prevent the piston to descend when exhaust pressure release is accomplished, fall back and reset, in order to guarantee follow-up exhaust pressure release that can continuously and stably, solve the drawback that current spring control explosion-proof valve opened many times and cause the performance to reduce, realize that piston and guide arm prevent to fall back after opening for the first time, can the biggest quick timely pressure release, guarantee lasting and stable pressure release effect. Meanwhile, the problem that the pressure relief effect is poor due to the fact that the piston is opened and clamped, cannot be opened again or the opening height is reduced when the battery pack is continuously detonated for multiple times in a thermal runaway state can be effectively solved. The utility model discloses simple structure, equipment convenience, can adopt stainless steel or aluminum material to make, can batch production, with low costs, have fine social and economic benefits.

Of course, the above description is only an exemplary embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes and modifications made by the constructions, features, and principles of the present invention in accordance with the claims of the present invention are intended to be included in the scope of the present invention.

Claims

1. A valve core non-return explosion-proof valve comprises a valve body (1), a piston (2), a guide rod (3) and a spring (4), wherein the guide rod (3) is arranged in the valve body (1) in a penetrating mode and is connected with the piston (2); the spring (4) is sleeved on the periphery of the guide rod (3) and is arranged between the valve body (1) and the guide rod (3); piston (2) and guide arm (3) distribute in valve body (1) both sides, and this piston (2) closely laminates its characterized in that with valve body (1) under the spring action of spring (4):

a plurality of axially distributed check ring grooves (31) are formed in the periphery of the guide rod (3); an elastic clamping wire (5) capable of elastically deforming is arranged in the valve body (1), and the upper end of the guide rod (3) penetrates through the elastic clamping wire (5); when the guide rod (3) moves upwards, the elastic clamping wire (5) is clamped and embedded into the check ring groove (31) on the periphery of the guide rod (3), so that the guide rod (3) cannot reset, and a gap is formed between the piston (2) and the valve body (1) to release pressure.

2. The spool non-return explosion-proof valve of claim 1 wherein: the valve body (1) is provided with a through center hole (11); the guide rod (3) penetrates through the central hole (11), and a first step groove (111) and a second step groove (112) are formed in an opening at the upper end of the central hole (11); the elastic clamping wire (5) is arranged in the first step groove (111) and is in an elastic tight state; a wire clamping fixing ring (12) is fixed in the second stepped groove (112), and the wire clamping fixing ring (12) is arranged above the elastic clamping wire (5) in a covering manner to prevent the elastic clamping wire (5) from being separated from the first stepped groove (111).

3. The spool non-return explosion-proof valve of claim 1 wherein: the elastic clamping wire (5) comprises a clamping main body (51) used for clamping the check ring groove (31) and a first elastic arm (52) and a second elastic arm (53) which are formed at two ends of the clamping main body (51) in a turnover mode.

4. The spool non-return explosion-proof valve of claim 3 wherein: the elastic clamping wire (5) is formed by bending a metal wire, and the section of the elastic clamping wire is circular, elliptical or rectangular.

5. The spool non-return explosion-proof valve of claim 1 wherein: the elastic clamping wire (5) comprises an annular main body (54) and a plurality of metal clamping pieces (55) which are integrally formed on the inner side of the annular main body (54) and used for clamping and embedding the metal clamping pieces (55) into the check ring grooves (31), wherein the metal clamping pieces (55) are inclined relative to the annular main body (54).

6. The spool non-return explosion-proof valve of any one of claims 1 to 5, wherein: a through hole (32) is axially formed in the guide rod (3), and an internal thread (321) is formed on the inner wall of the end part of the through hole (32); the thread section formed at the lower end of the piston (2) is spirally fixed with the internal thread (321) of the guide rod (3), and the through hole (32) and the air hole (21) of the piston (2) form an air passage; and a waterproof breathable film (6) is further fixed on the piston (2), and the waterproof breathable film (6) covers the breathable holes (21).

7. The valve core check explosion-proof valve as recited in claim 6, wherein: be provided with third step groove (22) on piston (2), waterproof ventilated membrane (6) set up in this third step groove (22), and still be fixed with the solid fixed ring of diaphragm (61) in this third step groove (22), waterproof ventilated membrane (6) outside border is pushed down to this solid fixed ring of diaphragm (61).

8. The spool non-return explosion-proof valve of claim 7 wherein: an iron sheet (7) and an upper cover (8) are further arranged on the piston (2), the iron sheet (7) is arranged at the upper end of the diaphragm fixing ring (61), and the upper cover (8) is arranged at the upper end of the iron sheet (7).

9. The spool non-return explosion-proof valve of any one of claims 1 to 5, wherein: a protective sleeve (9) is fixed at the lower end of the valve body (1), and the protective sleeve (9) is further sleeved on the periphery of the guide rod (3).

10. The spool non-return explosion-proof valve of claim 9 wherein: the valve is characterized in that a boss (14) is formed at the lower end of the valve body (1), the boss (14) is sleeved at the upper end of the protective sleeve (9), and fastening assembly is formed through interference fit.