Explosion-proof pressure release valve with silt-proof structure

Abstract

The utility model belongs to the technical field of explosion-proof pressure release valves, and relates to an explosion-proof pressure release valve with a sediment-proof structure, which comprises a valve cover, a stainless iron sheet, a pressing ring, a breathable film, a pressing sheet, an inner O-shaped ring, a valve body, an outer sealing ring, a spring and a guide post, the valve cover is designed to be of the flanging structure, the ventilation channel is formed in the side face of the anti-explosion valve, and silt and mud cannot be injected into the anti-explosion valve from the front face; a ventilation gap between the valve cover and the valve body is designed to be smaller than the particle size of silt and mud particles, and silt and mud are blocked outside the anti-explosion valve; according to the explosion-proof valve, the valve cover turnup is adopted, the retaining wall is arranged between the valve cover and the valve body, the retaining wall is higher than the gap of the ventilation channel and forms a labyrinth structure, when water is injected into the explosion-proof valve, the water is blocked by the retaining wall and cannot be directly injected into the explosion-proof valve, the effect of IPX9K is achieved, the ventilation film is protected against damage, and the sealing integrity of the explosion-proof valve during high-pressure water injection is guaranteed; and the upper groove of the valve body is trapezoidal to prevent the inner O-shaped ring from being separated, so that the problem that the O-shaped ring pops up when an existing anti-explosion valve works is solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of explosion -proof pressure relief valve, concretely relates to an explosion -proof pressure relief valve with anti -silt structure. BACKGROUND

[0002] At present, a variety of designs of pressure relief explosion-proof valve are applied on new energy automobile battery pack, energy storage cabinet and other sealed heating components, all adopt the same structural principle, there are some functional problems and shortcomings in practical application, the following is detailed description:

[0003] 1, not anti-silt: the current explosion-proof valve realizes the function of ventilation, and the top of the external ventilation channel is designed as a circle of openings, the disadvantage of this design is: when the vehicle condition is complex and changeable, the opening is easy to enter silt and other substances, and the silt is accumulated on the inner side wall of the channel, so that the explosion-proof valve is blocked, and the phenomenon of jamming and opening is not easy to open occurs, or after opening, the silt adheres to the surface of the internal sealing element, which hinders the closing of the valve cover, resulting in sealing failure, water, mud and other phenomena appear in the shell.

[0004] 2, not reach IPX9K protection level: as described above, the ventilation opening of the current product is in the upward direction on the top of the valve body, the disadvantage of this design is: when IPX9K test is carried out, high pressure water is sprayed into the opening, water pressure is accumulated and reflected, the cover is lifted up, water enters the valve body and flows into the battery pack shell, and the IPX9K protection level requirement is not reached. During vehicle driving, high pressure splash often occurs in the road condition, if the explosion-proof valve does not meet the IPX9K protection level requirement, the phenomenon of water entering the battery pack is easy to appear, which causes the vehicle to be unable to start normally or causes an accident due to short circuit of the battery pack. INVENTION CONTENTS

[0005] The utility model aims at providing an explosion -proof pressure relief valve with anti -silt structure to solve the above -mentioned problems.

[0006] Technical scheme: an explosion -proof pressure relief valve with anti -silt structure, comprising: valve cover, stainless steel sheet, pressure ring, ventilation membrane, pressure sheet, inner O -ring, valve body, outer sealing ring, spring and guide column;

[0007] In further embodiments, the pressure sheet is mounted on the valve body, the valve cover is riveted and connected to the pressure sheet, the pressure sheet is fixed on the valve body, the fixed mounting is located at the inner top of the valve cover, the pressure ring fixes the ventilation membrane in the pressure ring, the inner O -ring is located in the upper groove of the valve body, the outer sealing ring is located in the lower groove of the valve body, the guide column is sleeved in the bottom of the valve body and one end penetrates the bottom of the valve body to the bottom of the pressure ring and is fixedly connected with the pressure ring, and the spring is sleeved outside the guide column and the bottom of the valve body.

[0008] In further embodiments, the upper groove of the valve body is trapezoidal in shape to prevent the inner O-ring from coming off.

[0009] In further embodiments, the top of the valve body is provided with several internally threaded holes.

[0010] In further embodiments, one side of the valve body is provided with a clamping groove.

[0011] In further embodiments, the guide column is provided with a gas permeable hole, and the gas enters and exits the gas permeable channel through the gas permeable membrane.

[0012] In further embodiments, a baffle wall is provided between the valve cover and the valve body and is higher than the gap of the gas permeable channel, forming a labyrinth structure.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The utility model discloses a valve cover designed as a flange structure, and a gas permeable channel is designed on the side of the explosion-proof valve, so that the sand and slurry cannot enter the explosion-proof valve from the front; the gas permeable gap between the valve cover and the valve body is designed to be smaller than the particle size of the sand and slurry, so that the sand and slurry are blocked outside the explosion-proof valve.

[0015] 2. The utility model discloses a valve cover flange design, a baffle wall is provided between the valve cover and the valve body, and the baffle wall is higher than the gap of the gas permeable channel, forming a labyrinth structure; when water is sprayed, the baffle wall blocks the water, and the water cannot directly enter the explosion-proof valve, thereby playing an IPX9K role, protecting the gas permeable membrane from being damaged, and ensuring the sealing integrity of the explosion-proof valve when high-pressure water is sprayed.

[0016] 3. The upper groove of the valve body is trapezoidal in shape to prevent the inner O-ring from coming off, thereby solving the problem that the O-ring pops out when the existing explosion-proof valve works.

[0017] Therefore, the utility model structure achieves the functions of preventing sand and slurry and other substances and resisting IPX9K high-pressure water spraying, improves the protection level of the explosion-proof valve, avoids the potential water leakage failure risk when the sand and slurry and high-pressure water are sprayed, and improves the overall safety and reliability of the battery pack. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the explosion diagram of the utility model.

[0019] Figure 2 is the isometric view of the utility model.

[0020] Figure 3 is the front view of the utility model.

[0021] Figure 4 is the sectional view of the utility model.

[0022] Valve cover 1, stainless steel sheet 2, compression ring 3, breathable film 4, compression sheet 5, inner O-ring 6, valve body 7, outer sealing ring 8, spring 9, guide column 10. DETAILED DESCRIPTION

[0023] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0024] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0026] An explosion-proof pressure relief valve with a silt prevention structure comprises a valve cover 1, a stainless steel sheet 2, a compression ring 3, a breathable film 4, a compression sheet 5, an inner O-ring 6, a valve body 7, an outer sealing ring 8, a spring 9, and a guide column 10.

[0027] In one embodiment, as Figures 1 to 4As shown, the pressing plate 5 is installed on the valve body 7, the valve cover 1 is riveted to the pressing plate 5 to fix the pressing plate 5 on the valve body 7, the fixed installation is located at the top of the valve cover 1, the pressing ring 3 fixes the air permeable membrane 4 in the pressing ring 3, the inner O-ring 6 is located in the upper groove of the valve body 7, the outer sealing ring 8 is located in the lower groove of the valve body 7, the guide column 10 is sleeved on the bottom of the valve body 7 and one end penetrates the bottom of the valve body 7 to the bottom of the pressing ring 3 and is fixedly connected with the pressing ring 3, and the spring 9 is sleeved on the outside of the guide column 10 and the bottom of the valve body 7.

[0028] In one embodiment, as shown in Figures 1 to 4 As shown, the upper groove of the valve body 7 is trapezoidal to prevent the inner O-ring 6 from falling off.

[0029] In one embodiment, as shown in Figures 1 to 4 As shown, the top of the valve body 7 is provided with a plurality of internally threaded holes.

[0030] In one embodiment, as shown in Figures 1 to 4 As shown, one side of the valve body 7 is provided with a clamping groove.

[0031] In one embodiment, as shown in Figures 1 to 4 As shown, the guide column 10 is provided with an air permeable hole, and the gas enters and exits through the air permeable hole of the guide column 10 through the air permeable membrane 4 to form an air permeable channel.

[0032] In one embodiment, as shown in Figures 1 to 4 As shown, a barrier is arranged between the valve cover 1 and the valve body 7 and is higher than the air permeable channel gap to form a labyrinth structure.

[0033] In one embodiment, as shown in Figures 1 to 4 As shown, the air permeable channel is designed on the side of the explosion-proof valve, and the sand slurry cannot enter the explosion-proof valve from the front; the air permeable gap between the valve cover 1 and the valve body 7 is designed to be smaller than the particle size of the sand slurry particles, so that the sand slurry is blocked outside the explosion-proof valve.

[0034] In one embodiment, as shown in Figures 1 to 4 As shown, the valve cover 1 is designed with a flange, a barrier is arranged between the valve cover 1 and the valve body 7 and is higher than the air permeable channel gap to form a labyrinth structure, and when water is injected, the barrier blocks the water and prevents it from directly entering the explosion-proof valve, thereby playing an IPX9K role, protecting the air permeable membrane 4 from being damaged and ensuring the sealing integrity of the explosion-proof valve under high-pressure water injection.

[0035] In one embodiment, as shown in Figures 1 to 4As shown, the utility model discloses a valve cover 1 is equipped with stainless steel sheet 2, to rivet pressure process installation, valve cover 1 and the rivet pressure connection of wafer 5, wafer 5 is equipped with pressure ring 3, and wafer 5 and pressure ring 3 between being equipped with gas permeable membrane 4 piece, wafer 5 is connected with valve body 7 through guide column 10, and wafer 5 and guide column 10 between being equipped with spring 9, through threaded connection, wafer 5 and valve body 7 between being equipped with inner O ring 6, and the outer measurement threaded root of valve body 7 is equipped with special-shaped sealing ring, and the middle of guide column 10 is equipped with gas permeable hole, and gas passes in and out through gas permeable membrane 4 again from the gas permeable hole of guide column 10, and it is gas permeable channel, when spring 9 compression, guide column 10 is moved to the outside together with wafer 5, valve cover 1 opens explosion-proof valve, and it is straight-through inside and outside, and it is pressure relief channel, the utility model has the characteristics of balancing the pressure difference inside and outside, waterproof, dustproof, silt mud, pressure relief explosion-proof.

[0036] In one embodiment, as shown in Figures 1 to 4 The working principle of the gas permeable channel is that gas is exchanged between the inside and outside through the gas permeable membrane 4 in the middle hole of the guide column 10. The gas permeable membrane 4 has the functions of waterproof, dustproof and oil-proof, and water, dust and liquid cannot enter the inside of the valve body 7 through the gas permeable membrane 4, thereby balancing the pressure difference.

[0037] In one embodiment, as shown in Figures 1 to 4 The principle of the pressure relief channel is that gas pressure accumulates on the surface of the wafer 5. The wafer 5 is connected with the spring 9 through the guide column 10 and the valve body 7. The spring 9 is compressed under force to drive the wafer 5 to open outward, so that the explosion-proof valve is directly connected with the outside of the battery pack, the gas pressure is discharged from the pressure relief channel, and rapid pressure relief is formed, thereby reducing the risk of explosion of the battery pack and achieving the safety explosion-proof function.

[0038] In one embodiment, as shown in Figures 1 to 4 Figures 1 to 4 The utility model discloses a circular shape, threaded installation, and one side of the valve body 7 is provided with four internal thread holes. The threaded installation is installed on the outside of the battery pack by cooperation with a screw. The screw is screwed into the internal thread hole of the explosion-proof valve from the inside of the battery pack through the through hole on the shell of the battery pack. The side of the explosion-proof valve is provided with a ring of clamping grooves, which are used for fixing the test tooling during the air tightness test.

[0039] Obviously, the above embodiments are only examples for clearly illustrating, and not limit the embodiments. For ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments need not and cannot be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the utility model.

Claims

1. An explosion-proof pressure relief valve with a mud and sand prevention structure, characterized in that, It comprises: a valve cover, a stainless steel sheet, a pressing ring, a gas permeable film, a pressing sheet, an inner O-ring, a valve body, an outer sealing ring, a spring and a guide column; the pressing sheet is installed on the valve body, the valve cover is riveted on the pressing sheet to fix the pressing sheet on the valve body, the fixed installation is located at the top of the valve cover, the pressing ring fixes the gas permeable film in it, the inner O-ring is located in the upper groove of the valve body, the outer sealing ring is located in the lower groove of the valve body, the guide column is sleeved in the bottom of the valve body and one end penetrates through the bottom of the valve body to the bottom of the pressing ring and is fixedly connected with the pressing ring, and the spring is sleeved outside the guide column and the bottom of the valve body.

2. The explosion-proof pressure relief valve with anti-silt structure according to claim 1, characterized in that, The upper groove of the valve body is trapezoidal to prevent the inner O-ring from falling off.

3. The explosion-proof pressure relief valve with anti-silt structure according to claim 1, characterized in that, The top of the valve body is provided with a plurality of internal thread holes.

4. The explosion-proof pressure relief valve with anti-silt structure according to claim 1, characterized in that, One side of the valve body is provided with a clamping groove.

5. The explosion-proof pressure relief valve with anti-silt structure according to claim 1, characterized in that, The guide column is provided with a gas permeable hole, and the gas enters and exits through the gas permeable film from the gas permeable hole of the guide column to form a gas permeable channel.

6. The explosion-proof pressure relief valve with anti-silt structure according to claim 5, characterized in that, A baffle is arranged between the valve cover and the valve body and is higher than the gap of the gas permeable channel to form a labyrinth structure.

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