Explosion-proof valve test fixture

Abstract

The utility model belongs to the technical field of explosion-proof valve testing, and discloses an explosion-proof valve testing clamp, which comprises a first clamp and a second clamp, an air inlet channel is arranged in the first clamp, the air inlet channel is provided with a plurality of outlets and an air inlet, the outlets are in one-to-one correspondence with first limit areas, and the air inlet is provided with a plurality of second limit areas. The outlet is formed in the first limiting area corresponding to the outlet, and the outlet is configured to be right opposite to the anti-explosion valve on the cover plate; a plurality of air outlet channels are arranged in the second clamp, and each air outlet channel is provided with an inlet and an air outlet; the air outlet channels and the second limiting areas are in one-to-one correspondence, inlets of the air outlet channels are formed in the corresponding second limiting areas, and the inlets of the air outlet channels are configured to directly face the anti-explosion valve on the cover plate. The explosion-proof valve test fixture provided by the utility model can reduce the probability of air leakage and improve the accuracy of test results.

Description

Technical Field

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

[0002] The explosion-proof valve is used to open the valve in time to release pressure when the battery cell is thermally runaway, so as to reduce the risk of explosion and ensure the safety of the battery system. The explosion-proof valve requires that the valve cannot be opened during normal use of the battery, so its bursting pressure needs to be greater than the internal pressure of the battery cell from the beginning to the end of its life; the bursting pressure of the explosion-proof valve also needs to be less than the bursting pressure at the weld between the shell and the cover, otherwise the shell will explode first. For example, the maximum internal pressure of the battery cell from the beginning to the end of its life is 0.45Mpa, and the maximum pressure that the shell cover weld can withstand is 1.3Mpa. The initial burst value of the explosion-proof valve is set to 0.8Mpa. If the setting is too large, there is a problem that it cannot explode during thermal runaway. Moreover, due to the increase in the internal pressure of the battery cell, the explosion-proof valve will age faster under the action of the internal pressure, resulting in a decrease in its bursting value, and there is a risk of premature opening of the valve, such as decaying from 0.8Mpa to below 0.45Mpa. Therefore, it is necessary to conduct a life test experiment on the explosion-proof valve, and deduce its life during normal use of the battery cell through accelerated aging by air pressure and temperature.

[0003] In the prior art, due to the processing error of the explosion-proof valve, the residual thickness of the notch is different, and the explosion value is also different, so it is necessary to conduct a multi-sample life test on each batch of top covers equipped with explosion-proof valves. The clamps currently on the market usually act on one explosion-proof valve. Therefore, when performing life tests on multiple top covers, it is necessary to first connect the air inlets of multiple clamps to the corresponding air inlet pipes through plug-in connectors, and then connect the multiple air inlet pipes to the main air inlet pipe. Among them, since there are too many plug-in connectors, it is not easy to find which plug-in connector has failed, that is, it is difficult to find which clamp has a leakage problem, which is time-consuming and laborious, and the test results are also inaccurate.

[0004] Therefore, there is an urgent need for an explosion-proof valve test fixture to solve the above problems. Utility Model Content

[0005] The utility model aims to provide an explosion-proof valve testing fixture, which can reduce the probability of air leakage and improve the accuracy of test results.

[0006] As conceived above, the technical solution adopted by the utility model is:

[0007] An explosion-proof valve test fixture comprises a first fixture and a second fixture, wherein a side of the first fixture facing the second fixture has a plurality of first limiting areas arranged at intervals; an air inlet channel is arranged in the first fixture, the air inlet channel has a plurality of outlets and an air inlet, the outlets and the first limiting areas are in a one-to-one correspondence, and the outlets are formed in the first limiting areas corresponding thereto, wherein the outlets are configured to be arranged directly opposite to the explosion-proof valve on the cover plate; the air inlet is formed on the outer surface of the first fixture;

[0008] The second clamp has a side facing the first clamp with a plurality of second limiting areas arranged at intervals; the second limiting areas and the first limiting areas are in a one-to-one correspondence, wherein the corresponding second limiting areas and the second limiting areas are configured to be respectively arranged on opposite sides of the cover plate; a plurality of air outlet channels are arranged in the second clamp, and each of the air outlet channels has an inlet and an air outlet; the air outlet channels and the second limiting areas are in a one-to-one correspondence, and the inlet of the air outlet channel is formed in the corresponding second limiting area, wherein the inlet of the air outlet channel is configured to be arranged directly opposite to the explosion-proof valve on the cover plate; the air outlet of the air outlet channel is formed on the outer surface of the second clamp.

[0009] Optionally, the first fixture has a first surface facing the second fixture, and the second fixture has a second surface facing the first fixture; the second surface of the second fixture includes a plurality of second limiting areas arranged at intervals, and the first surface of the first fixture is recessed to form a plurality of placement cavities arranged at intervals, and the bottom of the placement cavity is the first limiting area, wherein the corresponding placement cavity and the second limiting area are configured to accommodate the cover plate;

[0010] Alternatively, the first surface of the first clamp includes a plurality of first limiting areas arranged at intervals, the second surface of the second clamp is recessed to form a plurality of second cover plate accommodating cavities arranged at intervals, the bottom of the second cover plate accommodating cavity is the second limiting area, wherein the second cover plate accommodating cavity and the first limiting area are configured to accommodate the cover plate;

[0011] Alternatively, the first surface of the first clamp is recessed to form a plurality of first accommodating cavities spaced apart, the bottom of the first accommodating cavities being the first limiting area, and the second surface of the second clamp is recessed to form a plurality of second accommodating cavities spaced apart, the bottom of the second accommodating cavities being the second limiting area, wherein the first accommodating cavities and the second accommodating cavities are configured to accommodate the cover plate.

[0012] Optionally, the air inlet channel includes a plurality of first channels, the first channels and the first limiting areas are in a one-to-one correspondence, the first channels form the outlets in the first limiting areas; the plurality of first channels are all connected to a second channel, the second channels form the air inlets on the outer surface of the first fixture;

[0013] Alternatively, two adjacent first channels are connected via a third channel, one of the first channels or one of the third channels is connected to a fourth channel, and the fourth channel forms the air inlet on the outer surface of the first fixture.

[0014] Optionally, a timer is provided at the air outlet of the second clamp.

[0015] Optionally, a blocking block may be selectively provided at the air outlet of the air outlet channel.

[0016] Optionally, the first clamp and the second clamp are detachably connected.

[0017] Optionally, the first clamp and the second clamp are detachably connected via a fastener, wherein a first fastening hole threadedly connected to the fastener is provided on a side of the first clamp facing the second clamp, and a second fastening hole corresponding to the first fastening hole is provided on the second clamp for the fastener to pass through.

[0018] Optionally, a positioning groove is provided in the first limiting area of ​​the first clamp, and the positioning groove is configured to cooperate with the liquid injection protrusion on the cover plate.

[0019] Optionally, the first limiting area of ​​the first clamp is recessed to form a first annular accommodating groove, wherein the outlet is located within the ring of the first accommodating groove; a first sealing ring is built into the first accommodating groove, and the first sealing ring is configured to be limited between the cover plate and the first accommodating groove.

[0020] Optionally, the second limiting area of ​​the second clamp is recessed to form an annular second accommodating groove, wherein the inlet is located within the ring of the second accommodating groove; a second sealing ring is built into the second accommodating groove, and the second sealing ring is configured to be limited between the cover plate and the second accommodating groove.

[0021] Beneficial effects of the utility model:

[0022] The utility model provides an explosion-proof valve test fixture, wherein the first fixture has multiple outlets and multiple first limiting areas, the second fixture has multiple inlets and multiple second limiting areas, the multiple outlets correspond to the multiple inlets one by one, and the corresponding outlet and inlet are opposite to the opposite sides of the explosion-proof valve for testing the explosion-proof valve, and the multiple outlets are all connected with the air inlet channel, so that the explosion-proof valve test fixture can test multiple explosion-proof valves at the same time, and the explosion-proof valve test fixture is only provided with one air inlet, which is connected with the multiple outlets through the air inlet channel, and the one air inlet is connected with an air inlet pipe through a plug-in connector, so that the required plug-in connectors can be less, the probability of air leakage is reduced, the failure of the plug-in connector can be quickly discovered, and then the location of the air leakage is quickly determined, the efficiency of discovering the leakage location is high, and the accuracy of the test results is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the explosion-proof valve test fixture provided by the embodiment of the utility model. Figure 1 ;

[0024] Figure 2 This is a schematic diagram of the explosion-proof valve test fixture provided by the embodiment of the utility model. Figure 2 ;

[0025] Figure 3 It is a structural schematic diagram of a first clamp provided in an embodiment of the utility model;

[0026] Figure 4 is a top view of a first clamp provided in an embodiment of the utility model;

[0027] Figure 5 This utility model Figure 4 AA section view shown;

[0028] Figure 6 This utility model Figure 5 The enlarged view of point E is shown;

[0029] Figure 7 It is a reference for the use status of the explosion-proof valve test fixture provided by the embodiment of the utility model. Figure 1 ;

[0030] Figure 8 This utility model Figure 7 Exploded view of the structure in

[0031] Fig. 9 It is a reference for the use status of the explosion-proof valve test fixture provided by the embodiment of the utility model. Figure 2 ;

[0032] Fig.10 This utility model Fig. 9BB section view shown;

[0033] Fig.11 This utility model Fig.10 The enlarged view of point D is shown;

[0034] Fig.12 This utility model Fig. 9 The CC section view shown;

[0035] Fig.13 It is a structural schematic diagram of a cover plate assembly provided in an embodiment of the utility model.

[0036] In the figure:

[0037] 100, first fixture; 110, first limiting area; 120, air inlet channel; 121, outlet; 122, air inlet; 123, first channel; 124, fourth channel; 125, third channel; 130, first surface; 140, placement cavity; 150, first fastening hole; 160, positioning groove; 170, first accommodating groove;

[0038] 200, second fixture; 210, second limiting area; 220, air outlet channel; 221, inlet; 222, air outlet; 230, second surface; 240, second fastening hole; 250, second accommodation groove;

[0039] 300. Timer;

[0040] 400, fasteners;

[0041] 500, first sealing ring;

[0042] 600, second sealing ring;

[0043] 1. Explosion-proof valve; 2. Cover plate; 21. Liquid injection protrusion. DETAILED DESCRIPTION

[0044] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, rather than all of them.

[0045] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0046] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the present utility model, unless otherwise clearly stipulated and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. In the description of this embodiment, unless otherwise specified, "multiple" specifically refers to two or more.

[0048] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0049] Embodiment 1

[0050] This embodiment provides an explosion-proof valve test fixture for testing an explosion-proof valve, which can reduce the probability of air leakage and improve the accuracy of the test results.

[0051] Fig.13 A schematic diagram of the structure of the cover plate assembly provided in this embodiment, as shown in FIG. Fig.13 As shown, the explosion-proof valve 1 is mounted on the cover plate 2, and the cover plate 2 is also provided with a liquid injection protrusion 21. The shape of the explosion-proof valve 1 can be circular, elliptical, racetrack-shaped, etc., which is not limited in this embodiment.

[0052] like Figures 1 to 13As shown, the explosion-proof valve test fixture includes a first fixture 100 and a second fixture 200. The first fixture 100 and the second fixture 200 are arranged opposite to each other. Among them, the first fixture 100 has a plurality of first limiting areas 110 arranged at intervals on the side facing the second fixture 200. In some embodiments, the plurality of first limiting areas 110 can be arranged at intervals along the length direction of the first fixture 100. Optionally, the first limiting areas 110 are used to place the cover plate 2, and each first limiting area 110 can only place one cover plate 2, so that the first fixture 100 in this embodiment can place multiple cover plates 2.

[0053] An air inlet channel 120 is provided in the first fixture 100, and the air inlet channel 120 has a plurality of outlets 121 and an air inlet 122. The outlets 121 and the first limiting area 110 are in a one-to-one correspondence, and each outlet 121 is formed in the first limiting area 110 corresponding thereto. Among them, the outlet 121 is configured to be arranged directly opposite to the explosion-proof valve 1 on the cover plate 2. For example, the orthographic projection of the explosion-proof valve 1 on the first fixture 100 can be located in the outlet 121. The air inlet 122 is formed on the outer surface of the first fixture 100 and is connected to an external gas source. The gas entering the air inlet channel 120 from the air inlet 122 can flow to the plurality of outlets 121.

[0054] The second fixture 200 has a plurality of second limiting areas 210 arranged at intervals on one side facing the first fixture 100; in this embodiment, the second limiting areas 210 and the first limiting areas 110 are in a one-to-one correspondence, and the second limiting areas 210 and the corresponding first limiting areas 110 are arranged relative to each other in the arrangement direction of the first fixture 100 and the second fixture 200. Optionally, the second limiting areas 210 are used to place the cover plate 2, and each second limiting area 210 can only place one cover plate 2, so that the second fixture 200 in this embodiment can place multiple cover plates 2. Among them, the correspondingly arranged second limiting areas 210 and the second limiting areas 210 are configured to be arranged on opposite sides of the cover plate 2 in the thickness direction.

[0055] A plurality of air outlet channels 220 are arranged in the second fixture 200, and each air outlet channel 220 has an inlet 221 and an air outlet 222. The air outlet channels 220 and the second limiting area 210 are in a one-to-one correspondence, and the inlet 221 of each air outlet channel 220 is formed in the second limiting area 210 corresponding thereto. Among them, the inlet 221 of the air outlet channel 220 is configured to be arranged directly opposite to the explosion-proof valve 1 on the cover plate 2. It should be noted that the plurality of air outlet channels 220 are independent of each other and are not connected to each other. For example, the orthographic projection of the explosion-proof valve on the second fixture 200 can be located in the inlet 221. The air outlet 222 of the air outlet channel 220 is formed on the outer surface of the second fixture 200, so that the gas in the air outlet channel 220 can flow out of the second fixture 200 through the air outlet 222.

[0056] When using the explosion-proof valve test fixture provided in this embodiment, multiple cover plates 2 provided with explosion-proof valves 1 are clamped between the first fixture 100 and the second fixture 200, and one side of each explosion-proof valve 1 faces an outlet 121, and the other side faces an inlet 221. Afterwards, an external gas source introduces gas into the inlet channel 120 through the air inlet 122, and the gas is dispersed to multiple outlets 121, and a certain pressure is generated at the outlet 121 on one side of the explosion-proof valve 1. When any explosion-proof valve 1 is broken, the gas at the outlet 121 corresponding to the explosion-proof valve 1 passes through the broken explosion-proof valve 1 and enters the inlet 221 opposite to the explosion-proof valve 1, and flows to the outlet 222 through the outlet channel 220.

[0057] The explosion-proof valve test fixture provided in the present embodiment comprises a first fixture 100 having a plurality of outlets 121 and a plurality of first limiting areas 110, and a second fixture 200 having a plurality of inlets 221 and a plurality of second limiting areas 210, wherein the plurality of outlets 121 correspond one to one with the plurality of inlets 221, and a corresponding outlet 121 and inlet 221 are opposite to the opposite sides of the explosion-proof valve 1 for testing the explosion-proof valve 1, and the plurality of outlets 121 are all connected with the air inlet channel 120, so that the explosion-proof valve test fixture provided in the present embodiment can test a plurality of explosion-proof valves 1 at the same time, and the explosion-proof valve test fixture is provided with only one air inlet 122, which is connected with the plurality of outlets 121 through the air inlet channel 120, and the one air inlet 122 is connected with an air inlet pipe through a plug-in connector, so that the required plug-in connectors can be less, thereby reducing the probability of air leakage, and even if air leakage occurs, the leakage position can be clearly identified for easy replacement.

[0058] In some optional embodiments, such as Figure 1 As shown, the first fixture 100 has a first surface 130 disposed facing the second fixture 200. Figure 2 As shown, the second fixture 200 has a second surface 230 disposed facing the first fixture 100 , and the second surface 230 of the second fixture 200 includes a plurality of second limiting areas 210 disposed at intervals.

[0059] like Figure 3As shown, the first surface 130 of the first fixture 100 is recessed to form a plurality of spaced placement cavities 140, and the bottom of the placement cavity 140 is the first limiting area 110, that is, the placement cavity 140 and the first limiting area 110 are in a one-to-one correspondence, so that the placement cavity 140 and the second limiting area 210 are also in a one-to-one correspondence. Among them, the corresponding placement cavity 140 and the second limiting area 210 are configured to accommodate the cover plate 2, so that the positioning and limiting of the cover plate 2 are achieved, so that the explosion-proof valve 1 can be opposite to the inlet 221 and the outlet 121, and the cover plate 2 is prevented from moving during the test of the explosion-proof valve 1.

[0060] In some optional embodiments, such as Figure 3 As shown, the placement cavity 140 is set through the first fixture 100 in the width direction of the first fixture 100. Since the cover plate 2 is usually long, the placement cavity 140 of the limited cover plate 2 is set through the first fixture 100 in the width direction of the first fixture 100, so that the width of the first fixture 100 does not need to be designed to be equal to the length of the cover plate 2, but can be less than the length of the cover plate 2, which is conducive to the miniaturization and lightweight of the first fixture 100 and the explosion-proof valve test fixture.

[0061] In some optional embodiments, please continue to see Figure 3 The air inlet channel 120 includes a plurality of first channels 123 . The first channels 123 and the first limiting regions 110 are in a one-to-one correspondence, and each first channel 123 forms an outlet 121 in the first limiting region 110 .

[0062] In this embodiment, a plurality of first channels 123 can be arranged in sequence along the length direction of the first fixture 100, and as shown in FIG. Figures 3 to 6 As shown, two adjacent first channels 123 are connected through the third channel 125. One first channel 123 or one third channel 125 is connected to the fourth channel 124, wherein: Figure 5 It is a schematic diagram of a first channel 123 connected to a fourth channel 124. The fourth channel 124 forms an air inlet 122 on the outer surface of the first fixture 100. The gas entering the fourth channel 124 through the air inlet 122 can enter the first channel 123 or the third channel 125 connected to the fourth channel 124. Since two adjacent first channels 123 are connected to each other, the gas can enter each first channel 123, so that one side of each explosion-proof valve 1 has gas.

[0063] In this embodiment, by providing a channel for gas flow in the first fixture 100, compared with the method of connecting through pipes, the number of plug-in connectors can be reduced, thereby improving the sealing performance and the assembly efficiency.

[0064] In some optional embodiments, such as Figure 7As shown, a timer 300 is provided at the gas outlet 222 of the second fixture 200. Specifically, the timer 300 is provided on the second fixture 200, and the trigger module of the timer 300 is designed to be arranged opposite to the gas outlet 222, so that when gas is discharged from the gas outlet 222, the trigger module of the timer 300 can be triggered, and the service life of the explosion-proof valve 1 corresponding to the gas outlet 222 can be recorded. In some optional embodiments, the timer 300 can be a timing device in the prior art, which is not limited in this embodiment.

[0065] In some other optional embodiments, a pressure sensor may be further provided at the air outlet 222 for detecting the pressure at the air outlet 222 so as to obtain the pressure at the air outlet 222 when the explosion-proof valve 1 corresponding to the air outlet 222 ruptures.

[0066] In some optional embodiments, a blocking block may be selectively provided at the air outlet 222 of the air outlet channel 220. After the explosion-proof valve 1 ruptures, the corresponding air outlet 222 is blocked by the blocking block, so that the gas does not flow out of the second fixture 200 through the air outlet 222, but is blocked in the air outlet channel 220. There will be no air leakage, so as not to affect the continued testing of other explosion-proof valves 1, thereby achieving the mutual independence of the tests of the explosion-proof valves 1.

[0067] In some optional embodiments, the first fixture 100 and the second fixture 200 in this embodiment are detachably connected, so that the explosion-proof valve test fixture has high flexibility and is convenient for placing the cover plate 2.

[0068] Further optionally, the first fixture 100 and the second fixture 200 are detachably connected by a fastener 400. Among them, the first fixture 100 is provided with a first fastening hole 150 threadedly connected to the fastener 400 on one side facing the second fixture 200, and the second fixture 200 is provided with a second fastening hole 240 corresponding to the first fastening hole 150 for the fastener 400 to pass through, one end of the fastener 400 is limited outside the surface of the second fixture 200 away from the first fixture 100, and the other end passes through the second fastening hole 240 and is screwed into the first fastening hole 150 to achieve the connection between the first fixture 100 and the second fixture 200. By setting the fastener 400 to be threadedly connected to the first fastening hole 150, the connection tightness of the first fixture 100 and the second fixture 200 can be guaranteed, so that the first fixture 100 and the second fixture 200 can be closely contacted with the cover plate 2, the connection sealing is improved, and the probability of air leakage is reduced, and the accuracy of the test is guaranteed. By way of example, the fastener 400 may be a bolt.

[0069] Optionally, the fastener 400, the first fastening hole 150 and the second fastening hole 240 may be provided in plurality, so as to improve the uniformity of the force applied to the first fixture 100 and the second fixture 200, and further improve the connection sealing of the explosion-proof valve test fixture. It should be noted that the first fastening hole 150 is arranged to avoid the first limiting area 110, and the second fastening hole 240 is arranged to avoid the second limiting area 210, so as not to affect the placement of the cover plate 2.

[0070] In some optional embodiments, such as Figure 3 and Figure 4 As shown, the first limiting area 110 of the first clamp 100 is provided with a positioning groove 160, and the positioning groove 160 is configured to cooperate with the injection protrusion 21 on the cover plate 2. On the one hand, it can achieve avoidance of the injection protrusion 21. On the other hand, the cooperation between the injection protrusion 21 and the positioning groove 160 can facilitate the positioning and directional installation of the cover plate 2 in the first limiting area 110, so that the position of the cover plate 2 is unique, thereby ensuring that the explosion-proof valve 1 can be directly opposite the outlet 121.

[0071] In some optional embodiments, please combine Figure 4 and Figure 6 , each first limiting area 110 of the first fixture 100 is recessed to form an annular first receiving groove 170. Among them, the multiple outlets 121 are in a one-to-one correspondence with the multiple first receiving grooves 170, and each outlet 121 is located in the ring of the first receiving groove 170 corresponding to it, that is, the first receiving groove 170 surrounds the outer periphery of the corresponding outlet 121. A first sealing ring 500 is arranged in each first receiving groove 170, and the first sealing ring 500 is configured to be limited between the cover plate 2 and the first receiving groove 170, and is used to seal the gap between the cover plate 2 and the first fixture 100 to prevent the gas in the air inlet channel 120 from leaking through the gap between the cover plate 2 and the first fixture 100. For example, the first sealing ring 500 can be an elastic structure such as a rubber ring or a silicone ring. Optionally, the first receiving groove 170 can be square, rectangular or runway-shaped, etc., which is not limited in this embodiment.

[0072] Alternatively, if Figures 10 to 12As shown, each second limiting area 210 of the second fixture 200 is recessed to form an annular second receiving groove 250. Among them, multiple inlets 221 are in a one-to-one correspondence with multiple second receiving grooves 250. Each inlet 221 is located in the ring of the second receiving groove 250 corresponding to it, that is, the second receiving groove 250 surrounds the outer periphery of the corresponding inlet 221. A second sealing ring 600 is arranged in each second receiving groove 250, and the second sealing ring 600 is configured to be limited between the cover plate 2 and the second receiving groove 250, and is used to seal the gap between the cover plate 2 and the second fixture 200 to prevent the gas in the air outlet channel 220 from leaking through the gap between the cover plate 2 and the second fixture 200. For example, the second sealing ring 600 can be an elastic structure such as a rubber ring or a silicone ring. Optionally, the second receiving groove 250 can be square, rectangular or runway-shaped, etc., which is not limited in this embodiment.

[0073] It should be noted that when the first clamp 100 and the second clamp 200 are connected by the fastener 400 , the first sealing ring 500 and the second sealing ring 600 are compressed to ensure the sealing performance.

[0074] The explosion-proof valve test fixture provided in this embodiment can realize the explosion-proof valve 1 opening test; the multiple first channels 123 on the first fixture 100 are connected in series, and the first fixture 100 is only provided with one air inlet 122 to achieve the purpose of one air intake and multiple air outlets; by setting a timer 300, the air outlet 222 of the air outlet channel 220 that has been opened can be timely blocked, thereby reducing the impact on the test of other explosion-proof valves 1.

[0075] Embodiment 2

[0076] The difference between this embodiment and the first embodiment lies in that the specific structure of the air intake passage 120 is different.

[0077] Specifically, in this embodiment, a second channel (not shown) is provided in the first fixture 100, and the second channel can extend along the arrangement direction of the plurality of first channels 123, and the plurality of first channels 123 are all connected to the second channel, and one end of the second channel extends to the outer surface of the first fixture 100, and an air inlet 122 is formed on the outer surface of the first fixture 100. The gas enters the second channel from the air inlet 122, and is dispersed from the second channel to the plurality of first channels 123, so that the plurality of first channels 123 are connected to each other.

[0078] The other structures in this embodiment are similar to the corresponding structures in the first embodiment and have similar beneficial effects, and will not be described in detail here.

[0079] Embodiment 3

[0080] The difference between this embodiment and the first embodiment lies in the different structure of the accommodating cover plate 2 .

[0081] Specifically, in this embodiment, the first surface 130 of the first fixture 100 includes a plurality of first limiting areas 110 arranged at intervals, and the second surface 230 of the second fixture 200 is recessed to form a plurality of second cover plate accommodating cavities (not shown) arranged at intervals, and the second cover plate accommodating cavities are in a one-to-one correspondence with the second limiting areas 210, and the cavity bottom of the second cover plate accommodating cavity is the second limiting area 210. Among them, the second cover plate accommodating cavity and the first limiting area 110 are configured to accommodate the cover plate 2, so that the positioning and limiting of the cover plate 2 are realized, so that the explosion-proof valve 1 can be opposite to the inlet 221 and the outlet 121, and the cover plate 2 is prevented from moving during the test of the explosion-proof valve 1.

[0082] The other structures in this embodiment are similar to the corresponding structures in the first embodiment and have similar beneficial effects, and will not be described in detail here.

[0083] Embodiment 4

[0084] The difference between this embodiment and the first embodiment lies in the different structure of the accommodating cover plate 2 .

[0085] Specifically, the first surface 130 of the first fixture 100 is recessed to form a plurality of first accommodating cavities (not shown) arranged at intervals, and the bottom of the first accommodating cavities is the first limiting area 110. The second surface 230 of the second fixture 200 is recessed to form a plurality of second accommodating cavities (not shown) arranged at intervals, and the bottom of the second accommodating cavities is the second limiting area 210. The first accommodating cavity and the second accommodating cavity are configured to accommodate the cover plate 2, so that the positioning and limiting of the cover plate 2 are achieved, so that the explosion-proof valve 1 can be opposite to the inlet 221 and the outlet 121, and the cover plate 2 is prevented from moving during the test of the explosion-proof valve 1.

[0086] The other structures in this embodiment are similar to the corresponding structures in the first embodiment and have similar beneficial effects, and will not be described in detail here.

[0087] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. Explosion-proof valve test fixture, characterized in that: The invention comprises a first clamp (100) and a second clamp (200), wherein a side of the first clamp (100) facing the second clamp (200) has a plurality of first limiting areas (110) arranged at intervals; an air inlet channel (120) is arranged in the first clamp (100), the air inlet channel (120) has a plurality of outlets (121) and an air inlet (122), the outlets (121) and the first limiting areas (110) are in a one-to-one correspondence, and the outlets (121) are formed in the first limiting areas (110) corresponding thereto, wherein the outlets (121) are arranged to be directly opposite to the explosion-proof valve (1) on the cover plate (2); and the air inlet (122) is formed on the outer surface of the first clamp (100); The second clamp (200) has a plurality of second limiting areas (210) arranged at intervals on a side facing the first clamp (100); the second limiting areas (210) and the first limiting areas (110) are in a one-to-one correspondence, wherein the correspondingly arranged second limiting areas (210) and the second limiting areas (210) are configured to be arranged on opposite sides of the cover plate (2) respectively; the second clamp (200) is provided with a plurality of air outlet channels (220), and each of the air outlet channels (220) is The invention has an inlet (221) and an outlet (222); the outlet channel (220) and the second limiting area (210) are in a one-to-one correspondence, and the inlet (221) of the outlet channel (220) is formed in the second limiting area (210) corresponding thereto, wherein the inlet (221) of the outlet channel (220) is configured to be arranged opposite to the explosion-proof valve (1) on the cover plate (2); and the outlet (222) of the outlet channel (220) is formed on the outer surface of the second clamp (200).

2. The explosion-proof valve test fixture according to claim 1, characterized in that: The first fixture (100) has a first surface (130) arranged facing the second fixture (200), and the second fixture (200) has a second surface (230) arranged facing the first fixture (100); the second surface (230) of the second fixture (200) includes a plurality of second limiting areas (210) arranged at intervals, and the first surface (130) of the first fixture (100) is recessed to form a plurality of placement cavities (140) arranged at intervals, and the bottom of the placement cavity (140) is the first limiting area (110), wherein the corresponding placement cavity (140) and the second limiting area (210) are configured to accommodate the cover plate (2); Alternatively, the first surface (130) of the first clamp (100) comprises a plurality of first limiting areas (110) arranged at intervals, the second surface (230) of the second clamp (200) is recessed to form a plurality of second cover plate accommodating cavities arranged at intervals, the bottom of the second cover plate accommodating cavity being the second limiting area (210), wherein the second cover plate accommodating cavity and the first limiting area (110) are configured to accommodate the cover plate (2); Alternatively, the first surface (130) of the first clamp (100) is recessed to form a plurality of first accommodating cavities spaced apart, the bottom of the first accommodating cavities being the first limiting area (110), and the second surface (230) of the second clamp (200) is recessed to form a plurality of second accommodating cavities spaced apart, the bottom of the second accommodating cavities being the second limiting area (210), wherein the first accommodating cavities and the second accommodating cavities are configured to accommodate the cover plate (2).

3. The explosion-proof valve test fixture according to claim 1, characterized in that: The air inlet channel (120) comprises a plurality of first channels (123), the first channels (123) and the first limiting area (110) are in a one-to-one correspondence, the first channels (123) form the outlet (121) in the first limiting area (110); the plurality of first channels (123) are all connected to the second channels, the second channels form the air inlet (122) on the outer surface of the first fixture (100); Alternatively, two adjacent first channels (123) are connected via a third channel (125), one of the first channels (123) or one of the third channels (125) is connected to a fourth channel (124), and the fourth channel (124) forms the air inlet (122) on the outer surface of the first fixture (100).

4. The explosion-proof valve test fixture according to claim 1, characterized in that: A timer (300) is provided at the air outlet (222) of the second clamp (200).

5. The explosion-proof valve test fixture according to claim 1, characterized in that: The air outlet (222) of the air outlet channel (220) may be selectively provided with a blocking block.

6. The explosion-proof valve test fixture according to claim 1, characterized in that: The first clamp (100) and the second clamp (200) are detachably connected.

7. The explosion-proof valve test fixture according to claim 6, characterized in that: The first clamp (100) and the second clamp (200) are detachably connected via a fastener (400), wherein a first fastening hole (150) threadedly connected to the fastener (400) is provided on a side of the first clamp (100) facing the second clamp (200), and a second fastening hole (240) for the fastener (400) to pass through is provided on the second clamp (200) corresponding to the first fastening hole (150).

8. The explosion-proof valve test fixture according to claim 1, characterized in that: The first limiting area (110) of the first clamp (100) is provided with a positioning groove (160), and the positioning groove (160) is configured to cooperate with the liquid injection protrusion (21) on the cover plate (2).

9. The explosion-proof valve test fixture according to any one of claims 1 to 8, characterized in that: The first limiting area (110) of the first clamp (100) is recessed to form an annular first accommodating groove (170), wherein the outlet (121) is located within the ring of the first accommodating groove (170); the first accommodating groove (170) is provided with a first sealing ring (500), and the first sealing ring (500) is configured to be limited between the cover plate (2) and the first accommodating groove (170).

10. The explosion-proof valve test fixture according to claim 9, characterized in that: The second limiting area (210) of the second clamp (200) is recessed to form an annular second accommodating groove (250), wherein the inlet (221) is located within the ring of the second accommodating groove (250); the second accommodating groove (250) is built with a second sealing ring (600), and the second sealing ring (600) is configured to be limited between the cover plate (2) and the second accommodating groove (250).

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