Explosion-proof valve blasting tool

Abstract

The utility model discloses an explosion-proof valve blasting tool which comprises a first clamping base, a second clamping base, a first clamping ring face, a second clamping ring face, a second clamping ring face and a second clamping ring face. The second clamping seat is provided with a second clamping ring surface; the first clamping ring surface and the second clamping ring surface are used for performing surface clamping on the two sides of the anti-explosion valve, and the jacking convex part is used for extruding one side of the anti-explosion valve; a first air pressure cavity is formed in the position, located on the inner circumference of the first clamping ring face, of the first clamping base, and / or a second air pressure cavity is formed in the position, located on the inner circumference of the second clamping ring face, of the second clamping base. By the adoption of the scheme, the explosion-proof valve blasting tool has the advantages that the two sides of an explosion-proof valve are clamped through the first clamping ring face and the second clamping ring face so that first face clamping can be provided, the top pressing protruding part directly extrudes and is embedded into the explosion-proof valve so that second face clamping can be provided, and the clamping stability is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the field of explosion-proof valve explosion testing, and in particular relates to an explosion-proof valve explosion tool. Background Art

[0002] The explosion-proof valve is an essential structure in the battery of electric vehicles. It is used to vent gas in time when a violent adverse reaction occurs inside the battery and a large amount of gas is generated to prevent the battery from expanding and exploding.

[0003] like Figure 1 As shown, in order to adapt to the flat blade battery, the existing explosion-proof valve 3 is usually slender, and the outer periphery of the explosion-proof valve 3 is provided with a ring-shaped connecting portion 31, so that the connecting portion 31 is welded to the battery shell and installed on the upper end of the blade battery. It should be noted that due to the small width of the blade battery, the distance between the inner periphery and the outer periphery of the connecting portion 31 is small.

[0004] In addition, in order to ensure the effective explosion of the explosion-proof valve under the explosion gas pressure, it is usually necessary to carry out an explosion test on the designed explosion-proof valve. Specifically, the upper and lower ends of the connection part are fixed by surface clamping to simulate the explosion-proof valve being welded to the battery casing for fixation, and then compressed gas is introduced into the lower end of the explosion-proof valve to simulate the generation of a large amount of gas inside the battery to increase the internal pressure, so as to detect whether the explosion-proof valve meets the design requirements according to the actual explosion pressure of the explosion-proof valve.

[0005] However, the existing blasting problems are: the distance from the inner circumference to the outer circumference of the connection part is small, so that the surface clamping strength is insufficient, and the connection part is easy to be out of the clamping state when the explosion-proof valve is not exploded, resulting in the explosion-proof valve being pressurized up and down, making it impossible to complete the blasting test. Utility Model Content

[0006] In view of the shortcomings of the prior art, the purpose of the utility model is to provide an explosion-proof valve blasting tooling which clamps both sides of the explosion-proof valve by a first clamping ring surface and a second clamping ring surface to provide a first level of clamping, and a top pressure convex portion directly squeezes and embeds into the explosion-proof valve to provide a second level of clamping to ensure the stability of clamping.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A tool for bursting an explosion-proof valve, comprising: a first clamping seat, on which a first clamping annular surface is provided, and a top-pressure convex portion is provided on the first clamping annular surface; and a second clamping seat, on which a second clamping annular surface is provided; the first clamping annular surface and the second clamping annular surface are used to clamp the two sides of the explosion-proof valve, and the top-pressure convex portion is used to squeeze one side of the explosion-proof valve; the first clamping seat is provided with a first air pressure chamber located on the inner circumference of the first clamping annular surface, and the first air pressure chamber is used to evacuate or inflate air to form a pressure difference on both sides of the explosion-proof valve, and / or the second clamping seat is provided with a second air pressure chamber located on the inner circumference of the second clamping annular surface, and the second air pressure chamber is used to evacuate or inflate air to form a pressure difference on both sides of the explosion-proof valve.

[0009] The utility model is further configured as follows: the pressing convex portion is arranged in a ring shape.

[0010] The utility model is further configured as follows: the top pressing protrusion is configured to be tapered in a direction perpendicular to and away from the first clamping ring surface; the top pressing protrusion includes a top pressing plane and a first inclined surface located on the inner circumference side of the top pressing plane and a second inclined surface located on the outer circumference side of the top pressing plane, the first inclined surface extends inward from the inner circumference of the top pressing plane and is close to the first clamping ring surface, and the second inclined surface extends outward from the outer circumference of the top pressing plane and is close to the first clamping ring surface.

[0011] The utility model is further configured as follows: the spacing from the inner circumference to the outer circumference of the first clamping ring surface is s1, and the spacing from the inner circumference to the outer circumference of the pressing plane is s2, wherein 5*s2≤s1≤6*s2.

[0012] The utility model is further configured as follows: the first clamping seat is located above the second clamping seat.

[0013] The utility model is further configured as follows: the first air pressure chamber is used for evacuating air so that the pressure above the explosion-proof valve is lower than the pressure below; and / or the second air pressure chamber is used for inflating air so that the pressure below the explosion-proof valve is higher than the pressure above.

[0014] The utility model is further configured as follows: a first air nozzle communicating with the first air pressure chamber is arranged on the outer side of the first clamp seat; and / or a second air nozzle communicating with the second air pressure chamber is arranged on the outer side of the second clamp seat.

[0015] The utility model is further configured as follows: the second clamp seat is provided with a coordination cavity located above the second clamping ring surface, the coordination cavity is for the explosion-proof valve to be placed in so as to support the lower side of the explosion-proof valve through the second clamping ring surface and the circumferential positioning of the explosion-proof valve by the circumferential wall of the coordination cavity; the first clamp seat is provided with a first clamping ring portion at the lower end, the first clamping ring surface is provided at the bottom of the first clamping ring portion, the first clamping ring portion is inserted into the coordination cavity from the upper end of the coordination cavity, and clamps the upper side of the explosion-proof valve through the first clamping ring surface and the top pressure convex portion, and the outer circumferential wall of the first clamping ring portion and the inner circumferential wall of the coordination cavity cooperate to perform circumferential positioning.

[0016] The utility model is further configured as follows: the second clamping seat includes a detachably connected base and a ring seat, the upper end of the base is provided with a second clamping ring portion, the second clamping ring surface is provided at the top of the second clamping ring portion, the second clamping ring portion is inserted into the inner circumference of the ring seat from the lower end of the ring seat so that the base and the ring seat are combined to form a coordination cavity, and the outer circumferential wall of the second clamping ring portion and the inner circumferential wall of the ring seat cooperate to perform circumferential positioning.

[0017] The utility model is further configured as follows: the shape of the first clamping annular surface and the second clamping annular surface is a runway shape; the length of the inner circumference straight line segment of the first clamping annular surface and / or the second clamping annular surface is L1, and the length of the inner circumference arc segment of the first clamping annular surface and / or the second clamping annular surface is D1, wherein 5*D1≤L1≤6*D1; the length of the outer circumference straight line segment of the first clamping annular surface and / or the second clamping annular surface is L2, and the length of the outer circumference arc segment of the first clamping annular surface and / or the second clamping annular surface is D2, wherein L1=L2, 1.3*D1≤D2≤1.4*D1.

[0018] By adopting the above technical solution, the beneficial effects achieved by the utility model are as follows:

[0019] 1. Clamp the connection part of the explosion-proof valve by the first clamp seat and the second clamp seat, and after the clamping and fixing is completed, the first air pressure chamber is evacuated and the second air pressure chamber is inflated, so that the pressure on the upper side of the explosion-proof valve is lower than the atmospheric pressure and the pressure on the lower side is higher than the atmospheric pressure, and when the pressure difference on both sides gradually increases until the explosion-proof valve bursts, the pressure in the first air pressure chamber and the second air pressure chamber is read, and the pressure difference value is calculated to determine whether the explosion-proof valve meets the requirements. The advantage is that the pressure difference in the first air pressure chamber and the second air pressure chamber is maximized by reverse pressure supply on both sides, and both are closer to atmospheric pressure, making the operation more convenient and safer.

[0020] 2. Place the explosion-proof valve between the first clamp seat and the second clamp seat, and clamp the upper and lower sides of the connection part of the explosion-proof valve through the first clamping ring surface and the second clamping ring surface to achieve the first level of fixation. This clamping method maximizes the contact area with the connection part to improve the clamping strength.

[0021] 3. When the first clamping annular surface clamps the upper side of the connection part, the pressing convex part is embedded in the connection part to form a snap-fit ​​structure, thereby realizing the second fixation. This structure effectively limits the radial direction of the connection part and prevents the connection part from radially escaping from the clamping of the first clamp seat and the second clamp seat.

[0022] In summary, the connection portion is stably clamped and secured by the double clamping method. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a schematic diagram of an explosion-proof valve;

[0025] Figure 2 It is an assembly diagram of a specific implementation method of the utility model;

[0026] Figure 3 It is a cross-sectional view of a specific implementation mode of the utility model;

[0027] Figure 4 It is an assembly diagram of the second clamping seat in a specific implementation manner of the utility model;

[0028] Figure 5 It is an assembly diagram of the first clamping seat in a specific implementation manner of the utility model;

[0029] Figure 6 for Figure 3 A is an enlarged view of the middle image.

[0030] Description of reference numerals:

[0031] 1. The first clamping seat;

[0032] 11. first clamping ring; 12. first air pressure chamber; 13. first air nozzle; 14. top pressure convex part;

[0033] 111, first clamping annular surface; 141, top pressing plane; 142, first inclined surface; 143, second inclined surface;

[0034] 2. The second clamping seat;

[0035] 21. second clamping ring; 22. second air pressure chamber; 23. second air nozzle; 24. coordination chamber; 25. base; 26. ring seat;

[0036] 211, second clamping annular surface;

[0037] 3. Explosion-proof valve;

[0038] 31. Connecting part. DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to better understand the present invention, and thus to more clearly define the scope of protection claimed by the present invention, the present invention is described in detail below with respect to certain specific embodiments of the present invention. It should be noted that the following are only certain specific implementation methods of the present invention, which are only part of the embodiments of the present invention, wherein the specific and direct description of the relevant structures is only for the convenience of understanding the present invention, and each specific feature does not naturally and directly limit the scope of implementation of the present invention. The conventional selections and substitutions made by those skilled in the art under the guidance of the present invention shall be deemed to be within the scope of protection claimed by the present invention.

[0040] like Figure 2-Figure 6 As shown, the utility model discloses an explosion-proof valve blasting tool for Figure 1 The explosion-proof valve 3 shown is tooled, specifically including:

[0041] A first clamping seat 1, a first clamping annular surface 111 is disposed at the lower side of the first clamping seat 1, a top-pressing convex portion 14 is disposed on the first clamping annular surface 111 and protrudes downward, and a first air pressure chamber 12 is disposed on the inner periphery of the first clamping annular surface 111 of the first clamping seat 1, and the first air pressure chamber 12 is used for pumping or inflating air to form a pressure difference on both sides of the explosion-proof valve 3;

[0042] The second clamping seat 2 has a second clamping annular surface 211 on its upper side, and a second air pressure chamber 22 is arranged on the inner periphery of the second clamping annular surface 211 of the second clamping seat 2. The second air pressure chamber 22 is used for pumping or inflating air to form a pressure difference on both sides of the explosion-proof valve 3.

[0043] The connection portion 31 of the explosion-proof valve 3 is clamped by the first clamping seat 1 and the second clamping seat 2, and after the clamping and fixing is completed, the first air pressure chamber 12 is evacuated and the second air pressure chamber 22 is inflated, so that the pressure on the upper side of the explosion-proof valve 3 is lower than the atmospheric pressure, and the pressure on the lower side is higher than the atmospheric pressure, and when the pressure difference on both sides gradually increases to the explosion-proof valve 3 bursts, the pressures in the first air pressure chamber 12 and the second air pressure chamber 22 are read, and the pressure difference value is calculated to determine whether the explosion-proof valve 3 meets the requirements. The advantage is that the pressure difference in the first air pressure chamber 12 and the second air pressure chamber 22 reaches the maximum due to the reverse pressure supply on both sides, and both are closer to the atmospheric pressure, making the operation more convenient and safer.

[0044] The explosion-proof valve 3 is placed between the first clamping seat 1 and the second clamping seat 2, and the upper and lower sides of the connection part 31 of the explosion-proof valve 3 are clamped by the first clamping annular surface 111 and the second clamping annular surface 211 to achieve the first level of fixation. This clamping method maximizes the contact area with the connection part 31 to improve the clamping strength.

[0045] When the first clamping annular surface 111 clamps the upper side of the connecting portion 31, the pressing protrusion 14 is embedded in the connecting portion 31 to form a snap-fit ​​structure, thereby realizing the second fixation. This structure effectively limits the radial direction of the connecting portion 31 and prevents the connecting portion 31 from radially escaping from the clamping of the first clamp seat 1 and the second clamp seat 2.

[0046] In summary, the connection portion 31 is stably clamped and secured by the double clamping method.

[0047] In other embodiments, only the first air pressure chamber 12 or the second air pressure chamber 22 is provided, so as to detect whether the bursting pressure meets the requirements by forming a pressure difference through evacuating or inflating the first air pressure chamber 12 or the second air pressure chamber 22 .

[0048] Preferably, the top pressure protrusion 14 in this embodiment is arranged in an annular shape, so that the top pressure protrusion 14 acts on the connecting part 31 to form an annular embedded groove on the connecting part 31, so that the embedded groove and the top pressure protrusion 14 are matched in an annular manner so that the force at all locations in the circumference remains stable and has a more uniform sealing effect in the circumference.

[0049] Preferably, the pressing protrusion 14 in the present embodiment is configured to be tapered in a direction perpendicular to and away from the first clamping annular surface 111, so that the lower surface area of ​​the pressing protrusion 14 is minimized and a greater force is generated during pressing to extrude and deform the connecting portion 31. The volume of the pressing protrusion 14 is ensured by expanding upward to ensure the connection strength between the pressing protrusion 14 and the first clamping seat 1, thereby preventing the explosion-proof valve 3 from being broken by the pressing protrusion 14 under the action of air pressure.

[0050] Specifically, the pressing protrusion 14 includes a pressing plane 141 on the lower side, a first inclined surface 142 located on the inner circumference of the pressing plane 141, and a second inclined surface 143 located on the outer circumference of the pressing plane 141. The first inclined surface 142 extends inward from the inner circumference of the pressing plane 141 and is close to the first clamping ring surface 111, and the second inclined surface 143 extends outward from the outer circumference of the pressing plane 141 and is close to the first clamping ring surface 111, so that the pressing protrusion 14 is expanded upward by the first inclined surface 142 and the second inclined surface 143, and the lower end of the pressing protrusion 14 is in contact with the connecting portion 31 by setting the pressing plane 141, so as to prevent stress concentration from occurring at the lower end of the pressing protrusion 14 and the connecting portion 31, thereby preventing the connecting portion 31 from being cut off and causing failure of the pressing protrusion 14 and a reduction in the actual force-bearing area of ​​the connecting portion 31, resulting in a reduction in the clamping strength.

[0051] Preferably, the spacing from the inner circumference to the outer circumference of the first clamping annular surface 111 in this embodiment is s1, and the spacing from the inner circumference to the outer circumference of the top pressing plane 141 is s2, wherein 5*s2≤s1≤6*s2, so that the suitable top pressing plane 141 can effectively realize the top pressing protrusion 14 embedded in the connecting portion 31 and ensure the area of ​​the first clamping annular surface 111 for clamping.

[0052] Preferably, a first air nozzle 13 connected to the first air pressure chamber 12 is provided on the outer side of the first clamp seat 1 in this embodiment; a second air nozzle 23 connected to the second air pressure chamber 22 is provided on the outer side of the second clamp seat 2, so that the air pump and the air pump can be connected through the first air nozzle 13 and the second air nozzle 23 for inflation and exhaust.

[0053] In addition, the second clamp seat 2 in the present embodiment is provided with a coordination cavity 24 located above the second clamping annular surface 211, and the inner circumferential wall shape of the coordination cavity 24 is adapted to the outer circumferential wall shape of the connecting portion 31, so that the explosion-proof valve 3 can be inserted from the upper side of the coordination cavity 24, and the lower side of the explosion-proof valve 3 is supported by the second clamping annular surface 211, and the circumferential wall of the coordination cavity 24 positions the explosion-proof valve 3 circumferentially, so that when the first clamp seat 1 and the second clamp seat 2 are matched, the positioning of the explosion-proof valve 3 is more stably.

[0054] Correspondingly, a first clamping ring portion 11 is protruding downward at the lower end of the first clamping seat 1, and a first clamping ring surface 111 is arranged at the bottom of the first clamping ring portion 11. The first clamping ring portion 11 is inserted into the coordination cavity 24 from the upper end of the coordination cavity 24, and the upper side of the explosion-proof valve 3 is clamped by the first clamping ring surface 111 and the top pressure protrusion 14. In addition, the outer peripheral wall of the first clamping ring portion 11 and the inner peripheral wall of the coordination cavity 24 are adapted, so that the outer peripheral wall of the first clamping ring portion 11 and the inner peripheral wall of the coordination cavity 24 cooperate for circumferential positioning, so that the first clamping ring surface 111 and the top pressure protrusion 14 clamp the connecting portion 31 more accurately.

[0055] Specifically, the second clamping seat 2 in the present embodiment includes a base 25 and a ring seat 26, the upper end of the base 25 is protruding upward and is provided with a second clamping ring portion 21, the second clamping ring surface 211 is arranged on the top of the second clamping ring portion 21, the second clamping ring portion 21 is inserted into the inner circumference of the ring seat 26 from the lower end of the ring seat 26 so that the base 25 and the ring seat 26 are combined to form a coordination cavity 24, and the base 25 and the ring seat 26 are fixedly installed by bolts, and in addition, the outer circumferential wall of the second clamping ring portion 21 and the inner circumferential wall of the ring seat 26 cooperate for circumferential positioning.

[0056] Preferably, the first clamping annular surface 111 and the second clamping annular surface 211 are in the shape of a racetrack to adapt to Figure 1 The runway type explosion proof valve 3 is shown.

[0057] Among them, the length of the inner circumference straight line segment of the first clamping annular surface 111 and the second clamping annular surface 211 is L1, and the length of the inner circumference arc segment of the first clamping annular surface 111 and the second clamping annular surface 211 is D1, wherein 5*D1≤L1≤6*D1, so that the overall length of the detected explosion-proof valve 3 is longer and slender.

[0058] Among them, the length of the outer circumference straight line segment of the first clamping annular surface 111 and the second clamping annular surface 211 is L2, and the length of the outer circumference arc segment of the first clamping annular surface 111 and the second clamping annular surface 211 is D2, wherein L1=L2, 1.3*D1≤D2≤1.4*D1, so that the distance between the inside and outside of the connecting part 31 of the detected explosion-proof valve 3 is smaller and better adapted to the blade battery.

[0059] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An explosion-proof valve blasting tool, characterized in that: include: A first clamping seat (1), wherein the first clamping seat (1) is provided with a first clamping annular surface (111), and the first clamping annular surface (111) is provided with a pressing protrusion (14); and, A second clamping seat (2), wherein the second clamping seat (2) is provided with a second clamping annular surface (211); The first clamping annular surface (111) and the second clamping annular surface (211) are used to clamp the two sides of the explosion-proof valve (3), and the pressing convex portion (14) is used to press one side of the explosion-proof valve (3); The first clamp seat (1) is provided with a first air pressure chamber (12) located on the inner periphery of the first clamping annular surface (111), and the first air pressure chamber (12) is used for pumping air or inflating air so as to form a pressure difference on both sides of the explosion-proof valve (3); and / or the second clamp seat (2) is provided with a second air pressure chamber (22) located on the inner periphery of the second clamping annular surface (211), and the second air pressure chamber (22) is used for pumping air or inflating air so as to form a pressure difference on both sides of the explosion-proof valve (3).

2. The explosion-proof valve blasting tool according to claim 1, characterized in that: The pressing convex portion (14) is arranged in a ring shape.

3. The explosion-proof valve blasting tool according to claim 2 is characterized in that: The pressing protrusion (14) is arranged in a constricted manner in a direction perpendicular to and away from the first clamping annular surface (111); The pressing protrusion (14) comprises a pressing plane (141), a first inclined surface (142) located on the inner circumference side of the pressing plane (141), and a second inclined surface (143) located on the outer circumference side of the pressing plane (141), wherein the first inclined surface (142) extends inward from the inner circumference of the pressing plane (141) and is close to the first clamping annular surface (111), and the second inclined surface (143) extends outward from the outer circumference of the pressing plane (141) and is close to the first clamping annular surface (111).

4. The explosion-proof valve blasting tool according to claim 3 is characterized in that: The distance between the inner periphery and the outer periphery of the first clamping annular surface (111) is s1, and the distance between the inner periphery and the outer periphery of the pressing plane (141) is s2, wherein 5*s2≤s1≤6*s2.

5. The explosion-proof valve blasting tool according to claim 1, characterized in that: The first clamping seat (1) is located above the second clamping seat (2).

6. The explosion-proof valve blasting tool according to claim 1, characterized in that: A first air nozzle (13) communicating with the first air pressure chamber (12) is arranged on the outer side of the first clamping seat (1); A second air nozzle (23) communicating with the second air pressure chamber (22) is arranged on the outer side of the second clamping seat (2).

7. The explosion-proof valve blasting tool according to claim 1 or 5, characterized in that: The second clamping seat (2) is provided with a coordination cavity (24) located above the second clamping annular surface (211), wherein the explosion-proof valve (3) is placed in the coordination cavity (24) so ​​as to support the lower side of the explosion-proof valve (3) through the second clamping annular surface (211), and the peripheral wall of the coordination cavity (24) positions the explosion-proof valve (3) in a circumferential direction; A first clamping ring portion (11) is provided at the lower end of the first clamping seat (1), and the first clamping ring surface (111) is provided at the bottom of the first clamping ring portion (11). The first clamping ring portion (11) is inserted into the coordination cavity (24) from the upper end of the coordination cavity (24), and clamps the upper side of the explosion-proof valve (3) through the first clamping ring surface (111) and the top pressure convex portion (14). The outer peripheral wall of the first clamping ring portion (11) and the inner peripheral wall of the coordination cavity (24) cooperate to perform circumferential positioning.

8. The explosion-proof valve blasting tool according to claim 7, characterized in that: The second clamping seat (2) comprises a base (25) and a ring seat (26) which are detachably connected, the upper end of the base (25) is provided with a second clamping ring portion (21), the second clamping ring surface (211) is provided on the top of the second clamping ring portion (21), the second clamping ring portion (21) is inserted from the lower end of the ring seat (26) into the inner circumference of the ring seat (26) so that the base (25) and the ring seat (26) are combined to form a coordination cavity (24), and the outer circumferential wall of the second clamping ring portion (21) and the inner circumferential wall of the ring seat (26) cooperate to perform circumferential positioning.

9. The explosion-proof valve blasting tool according to claim 1, characterized in that: The first clamping annular surface (111) and the second clamping annular surface (211) are in the shape of a racetrack; The length of the inner circumference straight line segment of the first clamping annular surface (111) and / or the second clamping annular surface (211) is L1, and the length of the inner circumference arc segment of the first clamping annular surface (111) and / or the second clamping annular surface (211) is D1, wherein 5*D1≤L1≤6*D1; The length of the outer circumference straight line segment of the first clamping annular surface (111) and / or the second clamping annular surface (211) is L2, and the length of the outer circumference arc segment of the first clamping annular surface (111) and / or the second clamping annular surface (211) is D2, wherein L1=L2, 1.3*D1≤D2≤1.4*D1.

Images