Explosion-proof valve opening test tool

Abstract

The utility model belongs to the technical field of explosion-proof valve detection, and discloses a valve opening test tool for an explosion-proof valve. The tool comprises an upper cover, a base and a sealing ring, the base is provided with a gas storage cavity, the upper cover is provided with an exhaust cavity, the sealing ring is provided with a pre-pressing groove, the pre-pressing groove is used for limiting and containing the anti-explosion valve, and the base and the upper cover can abut against each other to clamp and fix the sealing ring and the anti-explosion valve and are arranged between the gas storage cavity and the exhaust cavity in a sealed mode. And gas enters the gas storage cavity, and after the gas pressure in the gas storage cavity reaches the preset valve opening pressure, the gas penetrates through the cracking opening of the anti-explosion valve and is exhausted out of the tool through the exhaust cavity. By means of the tool, the explosion-proof valve can be prevented from being welded to the battery cover plate, and the testing efficiency is improved. Moreover, the tool can be compatible with explosion-proof valves of different specifications, thereby improving the compatibility and flexibility of the testing tool, and reducing the testing cost. And meanwhile, the explosion-proof valve is broken between the upper cover and the base, so that the noise during breaking can be reduced, and the hearing injury to an operator is weakened.

Description

Technical Field

[0001] The utility model relates to the technical field of explosion-proof valve detection, in particular to an explosion-proof valve opening test tool. Background Art

[0002] In the field of battery safety technology, explosion-proof valves are key components that prevent battery explosions caused by excessive internal pressure. Their performance stability and reliability are crucial to ensuring the overall safety of the battery system. Currently, while valve opening testing technology for explosion-proof valves has a certain application foundation, many technical challenges remain that need to be addressed.

[0003] Traditionally, the valve opening test of the explosion-proof valve usually requires welding the explosion-proof valve to the battery cover plate, and then placing the welded assembly into a dedicated test fixture for testing. However, this test method has obvious limitations. First, due to the diverse specifications of the battery top cover plates, even if the same specifications of explosion-proof valves are used, after being welded to battery top cover plates of different specifications, the required test fixtures are often not universal, which not only increases the test cost but also limits the flexibility of the test. Secondly, the introduction of the welding process not only increases the difficulty of the test, but also further increases the test cost. Finally, the noise generated when the explosion-proof valve is opened poses a threat to the operator's hearing. Working in an unprotected environment for a long time may cause irreversible damage to the operator's health.

[0004] Therefore, there is an urgent need for an explosion-proof valve opening test tool to solve at least one problem existing in the above-mentioned existing explosion-proof valve opening test technology. Utility Model Content

[0005] One purpose of the present invention is to provide an explosion-proof valve opening test tool, which can simplify the test process, reduce the test cost, and be compatible with the valve opening test needs of explosion-proof valves of different specifications.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] The explosion-proof valve opening test tooling includes an upper cover, a base and a sealing ring, including:

[0008] The base is provided with an air storage cavity, the upper cover is provided with an exhaust cavity, the sealing ring is provided with a pre-compression groove, the pre-compression groove is used to limit and accommodate the explosion-proof valve, the base and the upper cover can be abutted to clamp and fix the sealing ring and the explosion-proof valve and be sealed between the air storage cavity and the exhaust cavity;

[0009] The base also has an inflation port connected to the air storage chamber, and the upper cover also has an exhaust port connected to the exhaust chamber. Gas can enter the air storage chamber from the inflation port, and after the air pressure in the air storage chamber reaches a preset valve opening pressure, pass through the rupture of the explosion-proof valve and discharge the explosion-proof valve opening test fixture through the exhaust chamber and the exhaust port.

[0010] Preferably, the exhaust port is connected to a muffler.

[0011] Preferably, the upper cover is provided with a first protrusion, and the base is provided with a first positioning groove, and the first protrusion can be inserted into the first positioning groove to limit the upper cover and the base in a direction parallel to the explosion-proof valve.

[0012] Preferably, the upper cover is provided with at least two first protrusions, and the base is provided with at least two first positioning grooves.

[0013] Preferably, the base has a second positioning groove, and the sealing ring has a second protrusion, which can be inserted into the second positioning groove to limit the sealing ring and the base in a direction parallel to the explosion-proof valve.

[0014] Preferably, the second positioning groove is continuously arranged around the circumference of the air storage cavity, the second protrusion is continuously arranged around the circumference of the sealing ring, and the second protrusion can be sealingly inserted into the second positioning groove.

[0015] Preferably, the upper cover has a first opening, the first opening being communicated with the exhaust chamber, an opening end surface of the first opening being capable of abutting against the sealing ring and the explosion-proof valve to press the sealing ring and the explosion-proof valve against the sealing ring, and an opening size of the first opening in a direction parallel to the explosion-proof valve is larger than a notch size of the explosion-proof valve;

[0016] The base has a second opening, which is communicated with the air storage cavity. The opening end surface of the second opening can abut against the sealing ring to press the sealing ring and the explosion-proof valve against the upper cover.

[0017] Preferably, the explosion-proof valve is waist-shaped, and the first opening and the second opening are both waist-shaped openings; or,

[0018] The explosion-proof valve is circular, and the first opening and the second opening are both circular openings; or

[0019] The explosion-proof valve is elliptical, and the first opening and the second opening are both elliptical openings.

[0020] Preferably, the depth of the pre-pressed groove is 0.2 mm-0.4 mm.

[0021] Preferably, the upper cover and the base are detachably connected by at least one of bolts and fasteners.

[0022] The explosion-proof valve opening test fixture provided by the present invention has the following beneficial effects: the explosion-proof valve opening test fixture can avoid welding the explosion-proof valve to the battery cover, thereby simplifying the entire testing process, accelerating testing efficiency, and reducing testing costs. In addition, the clamping and fixing method enables the test fixture to be compatible with explosion-proof valves of different specifications and sizes within a certain range, thereby greatly increasing the compatibility and flexibility of the test fixture and further reducing testing costs. At the same time, the rupture of the explosion-proof valve occurs between the upper cover and the base, which can reduce the noise during rupture and reduce hearing damage to the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is an exploded diagram of the explosion-proof valve opening test fixture and the explosion-proof valve provided by the utility model;

[0024] Figure 2 This is a side view of the explosion-proof valve opening test tool provided by the utility model;

[0025] Figure 3 This is a vertical cross-sectional view of the explosion-proof valve opening test fixture and the explosion-proof valve provided by the utility model;

[0026] Figure 4 It is a top view of the base in the utility model;

[0027] Figure 5 yes Figure 3 A partial enlarged view of point A in the middle.

[0028] In the picture:

[0029] 1. Upper cover; 11. Exhaust cavity; 12. Exhaust port; 13. First protrusion;

[0030] 2. Base; 21. Air storage cavity; 22. Inflating port; 23. First positioning groove; 24. Second positioning groove;

[0031] 3. Sealing member; 31. Pre-compression groove; 32. Second protrusion;

[0032] 4. Explosion-proof valve; 41. Score;

[0033] 5. Muffler;

[0034] 6. Quick-connect connector. DETAILED DESCRIPTION

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0036] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0037] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0038] In the description of this embodiment, terms such as "upper," "lower," "right," and "left" are used to refer to positions or locations based on those shown in the accompanying drawings. These terms are intended solely for ease of description and simplified operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0039] The following is based on the attached Figure 1 To the attached Figure 5 The utility model introduces an explosion-proof valve opening test tool.

[0040] Specifically, if Figure 1 、 Figure 2As shown, in this embodiment, the explosion-proof valve opening test fixture mainly includes an upper cover 1, a base 2, and a sealing ring 3. The base 2 is provided with an air storage chamber 21 and an air filling port 22 connected to the air storage chamber 21. The upper cover 1 has an exhaust chamber 11 and an exhaust port 12 connected to the exhaust chamber 11. The sealing ring 3 has a pre-compression groove 31, which is used to limit and accommodate the explosion-proof valve 4 to be tested.

[0041] When using, such as Figure 2 、 Figure 3 As shown, the upper cover 1 can be placed on the base 2, thereby clamping the sealing ring 3 and the explosion-proof valve 4 and sealing them between the gas storage chamber 21 and the exhaust chamber 11. At this time, gas can be filled into the gas storage chamber 21 through the inflation port 22, so that the air pressure in the gas storage chamber 21 gradually increases. When the air pressure in the gas storage chamber 21 increases to the preset valve opening pressure of the explosion-proof valve 4, the notch 41 of the explosion-proof valve 4 will rupture, forming a rupture connecting the gas storage chamber 21 and the exhaust chamber 11. The gas in the gas storage chamber 21 will pass through the rupture and be discharged from the explosion-proof valve opening test fixture through the exhaust chamber 11 and the exhaust port 12. By observing whether the explosion-proof valve 4 remains intact when the air pressure is less than the preset valve opening pressure, and whether it ruptures when the air pressure reaches the preset valve opening pressure, the actual valve opening pressure of the explosion-proof valve 4 can be detected.

[0042] This explosion-proof valve opening test fixture avoids welding the explosion-proof valve 4 to the battery cover, simplifying the entire testing process, accelerating testing efficiency, and reducing testing costs. Furthermore, the clamping and fixing method enables the test fixture to be compatible with explosion-proof valves 4 of different specifications and sizes within a certain range, thereby greatly increasing the compatibility and flexibility of the test fixture and further reducing testing costs. At the same time, the rupture of the explosion-proof valve 4 occurs between the upper cover 1 and the base 2, which can reduce the noise during rupture and mitigate hearing damage to the operator.

[0043] Preferably, if Figure 2 、 Figure 3 As shown, the exhaust port 12 is connected to a muffler. Gas can be discharged from the test fixture through the muffler, thereby further reducing the noise during exhaust and better protecting the operator's hearing. Optionally, the inflation port 22 is connected to a quick-connect connector 6 to facilitate the insertion and removal of the air tube for inflation.

[0044] like Figure 2 、 Figure 4 As shown, in this embodiment, the upper cover 1 is provided with a first protrusion 13, and the base 2 is provided with a first positioning groove 23. The first protrusion 13 can be inserted into the first positioning groove 23, thereby limiting the upper cover 1 and the base 2 in a direction parallel to the explosion-proof valve 4, so that the sealing ring 3 and the explosion-proof valve 4 can be well sealed between the gas storage chamber 21 and the exhaust chamber 11.

[0045] Preferably, reference Figure 4 As shown, the base 2 is provided with two first positioning grooves 23, and the upper cover 1 is provided with two first protrusions 13. Each first protrusion 13 can be inserted into a corresponding first positioning groove 23, thereby effectively limiting and fixing the upper cover 1 and the base 2. Of course, in some other embodiments, a larger number of first positioning grooves 23 and first protrusions 13 can also be provided, and this is not specifically limited in the present invention.

[0046] like Figure 4 、 Figure 5 As shown, in this embodiment, the base 2 has a second positioning groove 24, and the sealing ring 3 has a second protrusion 32. The second protrusion 32 can be inserted into the second positioning groove 24 to limit the position of the sealing ring 3 and the base 2 in a direction parallel to the explosion-proof valve 4, so that the sealing ring 3 and the explosion-proof valve 4 can be well sealed between the gas storage chamber 21 and the exhaust chamber 11.

[0047] Preferably, reference Figure 4 As shown, the second positioning groove 24 is continuously arranged around the circumference of the air storage chamber 21, the second protrusion 32 is continuously arranged around the circumference of the sealing ring 3, and the second protrusion 32 can be sealed and inserted into the second positioning groove 24, thereby ensuring that the sealing ring 3 and the explosion-proof valve 4 can be well sealed between the air storage chamber 21 and the exhaust chamber 11, reducing leakage and ensuring the reliability of the test results.

[0048] Continue to refer Figure 5 As shown, in this embodiment, the upper cover 1 has a first opening, which is connected to the exhaust chamber 11. The opening end surface of the first opening can abut against the sealing ring 3 and the explosion-proof valve 4 to press the sealing ring 3 and the explosion-proof valve 4 against the sealing ring 3. The base 2 has a second opening, which is connected to the gas storage chamber 21. The opening end surface of the second opening can abut against the sealing ring 3 to press the sealing ring 3 and the explosion-proof valve 4 against the upper cover 1. In this way, the explosion-proof valve 4 and the sealing ring 3 can be fixed between the upper cover 1 and the base 2, and the sealing ring 3 can abut and seal between the upper cover 1 and the base 2. The sealing ring 3 and the explosion-proof valve 4 can isolate the gas storage chamber 21 from the exhaust chamber 11, preventing gas from leaking through the gap between the upper cover 1 and the base 2.

[0049] Preferably, along the direction parallel to the explosion-proof valve 4, the opening size of the first opening is larger than the notch size of the explosion-proof valve 4 to avoid obstruction to the rupture of the explosion-proof valve 4. Figure 5As shown, in this embodiment, there is a clearance distance of 0.25mm-0.5mm (i.e., distance d in the figure) between the side wall of the first opening and the notch 41 of the explosion-proof valve 4. Since the second opening does not contact the explosion-proof valve 4, it is preferably of the same opening size as the first opening to ensure a good seal between the end surfaces of the first and second openings, sandwiching the sealing ring 3 and the explosion-proof valve 4.

[0050] Optionally, in this embodiment, the depth of the pre-compression groove 31 is 0.2mm-0.4mm. It should be noted that as the preset valve opening pressure increases, the possibility of leakage between the upper cover 1 and the base 2 will also increase, so a shallower pre-compression groove 31 is required to ensure that there is sufficient pressure to form a good seal between the explosion-proof valve 4 and the seal. For example, when the preset valve opening pressure is 0.6 MPa, the depth of the pre-compression groove 31 is 0.4mm, and there is a smaller pressure between the explosion-proof valve 4 and the seal. When the preset valve opening pressure is 1.6 MPa, the depth of the pre-compression groove 31 is preferably 0.2mm, and a larger pressure can be formed between the explosion-proof valve 4 and the seal, thereby ensuring the sealing between the explosion-proof valve 4 and the seal.

[0051] Further optionally, in this embodiment, the upper cover 1 and the base 2 are connected by bolts, thereby stably clamping the seal and the explosion-proof valve 4 between the upper cover 1 and the base 2. Of course, in some other embodiments, a detachable connection can also be formed by other structures such as snap fasteners, and these are all within the scope of protection of the present utility model.

[0052] It should be noted that in this embodiment, by opening the upper cover 1 and the base 2, different seals can be replaced. Different seals have pre-compression grooves 31 of different sizes, which can be used to limit and fix explosion-proof valves 4 of different specifications. In addition, for explosion-proof valves 4 of different shapes, the shapes of the first opening and the second opening can also be set specifically to further ensure the sealing of the entire test work during the test. For example, when the explosion-proof valve 4 is waist-shaped, the first opening and the second opening are both waist-shaped openings; when the explosion-proof valve 4 is circular, the first opening and the second opening are both circular openings; when the explosion-proof valve 4 is elliptical, the first opening and the second opening are both elliptical openings.

[0053] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. The explosion-proof valve opening test tool is characterized by: It comprises an upper cover (1), a base (2) and a sealing ring (3), wherein: The base (2) is provided with an air storage cavity (21), the upper cover (1) has an exhaust cavity (11), the sealing ring (3) has a pre-pressing groove (31), and the pre-pressing groove (31) is used to limit and accommodate the explosion-proof valve (4). The base (2) and the upper cover (1) can be abutted to clamp and fix the sealing ring (3) and the explosion-proof valve (4) and seal them between the air storage cavity (21) and the exhaust cavity (11); The base (2) further comprises an air charging port (22) connected to the air storage chamber (21), and the upper cover (1) further comprises an exhaust port (12) connected to the exhaust chamber (11). Gas can enter the air storage chamber (21) from the air charging port (22), and after the air pressure in the air storage chamber (21) reaches a preset valve opening pressure, the gas passes through the rupture of the explosion-proof valve (4) and is discharged from the explosion-proof valve opening test fixture via the exhaust chamber (11) and the exhaust port (12).

2. The explosion-proof valve opening test tool according to claim 1, characterized in that: The exhaust port (12) is connected to a muffler.

3. The explosion-proof valve opening test tool according to claim 2, characterized in that: The upper cover (1) is provided with a first protrusion (13), and the base (2) is provided with a first positioning groove (23). The first protrusion (13) can be inserted into the first positioning groove (23) to limit the upper cover (1) and the base (2) in a direction parallel to the explosion-proof valve (4).

4. The explosion-proof valve opening test tool according to claim 3, characterized in that: The upper cover (1) is provided with at least two first protrusions (13), and the base (2) is provided with at least two first positioning grooves (23).

5. The explosion-proof valve opening test tool according to claim 2, characterized in that: The base (2) has a second positioning groove (24), and the sealing ring (3) has a second protrusion (32). The second protrusion (32) can be inserted into the second positioning groove (24) to limit the position of the sealing ring (3) and the base (2) in a direction parallel to the explosion-proof valve (4).

6. The explosion-proof valve opening test tool according to claim 5, characterized in that: The second positioning groove (24) is continuously arranged around the circumference of the air storage chamber (21), the second protrusion (32) is continuously arranged around the circumference of the sealing ring (3), and the second protrusion (32) can be sealed and inserted into the second positioning groove (24).

7. The explosion-proof valve opening test tool according to claim 2, characterized in that: The upper cover (1) has a first opening, the first opening is arranged to communicate with the exhaust chamber (11), the opening end surface of the first opening can abut against the sealing ring (3) and the explosion-proof valve (4) to press the sealing ring (3) and the explosion-proof valve (4) against the sealing ring (3), and the opening size of the first opening is larger than the notch size of the explosion-proof valve (4) in a direction parallel to the explosion-proof valve (4); The base (2) has a second opening, which is connected to the air storage chamber (21). The opening end surface of the second opening can abut against the sealing ring (3) to press the sealing ring (3) and the explosion-proof valve (4) against the upper cover (1).

8. The explosion-proof valve opening test tool according to claim 7, characterized in that: The explosion-proof valve (4) is waist-shaped, and the first opening and the second opening are both waist-shaped openings; or, The explosion-proof valve (4) is circular, and the first opening and the second opening are both circular openings; or, The explosion-proof valve (4) is elliptical, and the first opening and the second opening are both elliptical openings.

9. The explosion-proof valve opening test tool according to claim 1, characterized in that: The depth of the pre-pressed groove (31) is 0.2 mm to 0.4 mm.

10. The explosion-proof valve opening test tool according to claim 1, characterized in that: The upper cover (1) and the base (2) are detachably connected via at least one of bolts and snap fasteners.

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