Anti-explosion valve airtight tool detection box body

Abstract

The utility model relates to the technical field of air tightness detection of a battery pack, in particular to an air tightness tool detection box body of an explosion-proof valve, which comprises a detection box body, a piston assembly, a hand-cranking lead screw, a sealing cover and an air pipe connecting piece, and is characterized in that the hand-cranking lead screw is used for driving the piston assembly to move up and down in the detection box body; therefore, the inflation volume of the detection box body can be adjusted, and the inflation pressure states of different battery packs can be simulated. According to the airtight tool detection box body for the explosion-proof valve provided by the utility model, the adjustment of the inflation volume of the detection box body is realized through the piston assembly and the hand-cranking lead screw structure which are arranged on the detection box body, so that the inflation pressure states under different battery pack volumes are simulated, the inflation pressure is dynamically matched with the actual working condition, the detection error is reduced, and the detection accuracy is improved. Therefore, the unqualified airtight tool can be easily and effectively detected, and the problem that the unqualified airtight tool is difficult to effectively detect due to the fact that the detection error of the detection box body is large in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery pack airtightness detection technical field especially relates to a kind of anti-explosion valve airtight tool detection box. BACKGROUND

[0002] The battery pack box of new energy automobile needs to pass strict airtightness detection to satisfy national standard protection level IP67.As the key component of battery pack upper cover, anti-explosion valve not only needs to have specific air permeability to balance internal air pressure, but also needs to ensure the sealing property and waterproof performance of connection with battery pack, so the sealing detection of anti-explosion valve is crucial.

[0003] When carrying out airtightness test, specially designed airtight tool is usually used to block or pull open anti-explosion valve to meet the needs of actual installation and test.For example, the utility model disclosed in publication (announcement) No.CN215985016U discloses a kind of anti-explosion valve blocking test tool, and the utility model disclosed in publication (announcement) No.CN221781752U discloses anti-explosion valve air inlet tool.These airtight tools also need to pass strict airtightness detection to verify whether their performance meets the requirements.

[0004] The detection box volume for detecting the above-mentioned airtight tool is fixed, cannot simulate the inflation pressure state under different battery pack volumes, leads to deviation of detection result and actual working condition, further causes misjudgment, so that unqualified airtight tool is difficult to be effectively detected. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model provides a kind of anti-explosion valve airtight tool detection box, which realizes the adjustment of the inflation volume of detection box by the piston assembly and hand-cranked lead screw structure arranged on the detection box, so as to simulate the inflation pressure state under different battery pack volumes, make inflation pressure and actual working condition dynamic matching, reduce detection error, further make unqualified airtight tool more easily be effectively detected, solve the problem that unqualified airtight tool is difficult to be effectively detected due to large detection error of detection box in prior art.

[0006] The technical scheme of the utility model is as follows:

[0007] The utility model provides a kind of anti-explosion valve airtight tool detection box, including detection box, still including piston assembly, hand-cranked lead screw, sealing cover and gas pipe connecting piece, wherein,

[0008] The side of the detection box is provided with a plurality of air vents, one of the air vents is detachably connected with the gas pipe connecting piece, at least one of the air vents is detachably connected with the airtight tool to be tested, and the remaining air vents are blocked by the sealing cover.

[0009] The hand-operated screw rod is threadedly connected to the top of the detection box, and the lower end thereof extends into the detection box and is rotationally connected to the piston assembly;

[0010] The hand-operated screw rod is used to drive the piston assembly to move up and down in the detection box, so as to adjust the inflation volume of the detection box, thereby simulating the inflation pressure state of different battery packs.

[0011] On the basis of the above technical scheme, preferably, further comprising a rotating seat, wherein,

[0012] The rotating seat is rotationally arranged at the lower end of the hand-operated screw rod, and the bottom thereof is fixedly connected to the top of the piston assembly.

[0013] On the basis of the above technical scheme, preferably, the piston assembly comprises a pressure plate and a sealing ring, wherein,

[0014] The pressure plate is fixedly connected to the rotating seat, and the outer periphery thereof is provided with an annular groove;

[0015] The sealing ring is fixed in the annular groove and forms a sliding seal with the inner wall of the detection box.

[0016] On the basis of the above technical scheme, preferably, further comprising a screw rod nut, wherein,

[0017] The top of the detection box is provided with a nut mounting hole;

[0018] The screw rod nut is fixed in the nut mounting hole;

[0019] The hand-operated screw rod is threadedly connected to the screw rod nut.

[0020] On the basis of the above technical scheme, preferably, the outer periphery of the air inlet is provided with a plurality of bolt mounting holes, wherein,

[0021] The bolt mounting holes pass through the side wall of the detection box;

[0022] The sealing cover, the air pipe connecting piece and the air-tight tool are bolted to the corresponding bolt mounting holes.

[0023] On the basis of the above technical scheme, preferably, the air pipe connecting piece comprises an air pipe joint, a flange plate and a first sealing ring, wherein,

[0024] The flange plate is provided with a through hole, one end of the air pipe joint is threadedly connected to the through hole, and the other end selectively communicates with an air pump or an air-tight detector through an air line;

[0025] The end of the flange plate away from the air pipe joint is bolted to the side of the detection box, and the flange plate covers the air inlet at the corresponding position.

[0026] The first sealing gasket is clamped and fixed between the flange plate and the detection box.

[0027] On the basis of the above technical scheme, preferably, a second sealing gasket is clamped and fixed between the detection box and the airtight tooling.

[0028] On the basis of the above technical scheme, preferably, the top of the detection box is a hollow cylindrical structure, and the bottom is a hollow prism structure, wherein,

[0029] The piston assembly is arranged in the hollow cylindrical structure;

[0030] At least one air vent is arranged on each side end surface of the hollow prism structure.

[0031] On the basis of the above technical scheme, preferably, the side wall of the detection box is a transparent structure, and the surface is marked with vertical scale lines for indicating the displacement amount of the piston assembly.

[0032] On the basis of the above technical scheme, preferably, the side wall of the detection box is a transparent structure, and the surface is marked with vertical scale lines for indicating the displacement amount of the piston assembly.

[0033] The airtight tooling detection box of the utility model has the following beneficial effects relative to the prior art:

[0034] (1) The hand-operated screw drive piston assembly is arranged in the detection box to realize continuous adjustment of the inflation volume of the detection box, simulate the actual installation space and inflation pressure state of different battery packs, and dynamically match the detection pressure with the actual working condition of the battery pack, so as to reduce the detection error, reliably detect unqualified airtight tooling, and improve the reliability of the detection result.

[0035] (2) The detection box is provided with a plurality of air vents on the side, and at least one air vent is detachably connected to the airtight tooling to be tested, so that the detection box can detect airtight tooling of various types of explosion-proof valves, and improve the detection efficiency.

[0036] (3) The transparent side wall and vertical scale lines of the detection box are arranged to enable the operator to visually observe the displacement amount of the piston assembly, accurately control the volume adjustment amount, and further facilitate real-time monitoring of the internal state, reduce human operation error, and improve the controllability of the detection process. BRIEF DESCRIPTION OF DRAWINGS

[0037] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a perspective view of a test chamber for an explosion-proof valve airtightness tool according to the present invention;

[0039] Figure 2 This is a partial exploded view of a test chamber for an explosion-proof valve airtightness tool according to the present invention;

[0040] Figure 3 A schematic diagram of the internal structure of the inspection chamber;

[0041] In the diagram: 1. Testing chamber; 2. Piston assembly; 3. Hand crank screw; 4. Sealing cover; 5. Air pipe connector; 8. Air tightness tester; 9. Air tightness fixture; 11. Second sealing gasket; 21. Pressure plate; 22. Sealing ring; 31. Rotary seat; 32. Screw nut; 51. Air pipe connector; 52. Flange; 53. First sealing gasket; 101. Vent; 102. Nut mounting hole; 103. Bolt mounting hole; 104. Scale line; 401. Rubber layer; 2101. Annular groove; 5201. Through hole. Detailed Implementation

[0042] The technical solutions of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0043] like Figures 1-3 As shown, the present invention provides a test chamber for an explosion-proof valve airtightness fixture, which includes a test chamber 1, a piston assembly 2, a hand crank screw 3, a sealing cover 4, and an air pipe connector 5.

[0044] One of the air vents 101 is detachably connected with the air pipe connector 5, at least one of the air vents 101 is detachably connected with the air-tight tool 9 to be tested, and the remaining air vents 101 are plugged by the sealing cover 4; the hand-operated lead screw 3 is threadedly connected to the top of the detection box 1, and the lower end thereof extends into the detection box 1 and is rotationally connected with the piston assembly 2; the hand-operated lead screw 3 is used to drive the piston assembly 2 to move up and down in the detection box 1, so as to adjust the inflation volume of the detection box 1, and then simulate the inflation pressure state of different battery packs. Specifically, by arranging the hand-operated lead screw 3 to drive the piston assembly 2 to move up and down in the detection box 1, the continuous adjustment of the inflation volume of the detection box 1 is realized, which is convenient for simulating the actual installation space and inflation pressure state of different battery packs, so that the detection pressure is dynamically matched with the actual working condition of the battery pack, thereby reducing the detection error, ensuring that the unqualified air-tight tool 9 is reliably detected, and improving the reliability of the detection result.

[0045] In the above structure, the air pipe connector 5 is used to selectively communicate with the air pump or the air-tightness detector 8; before testing, the air pipe connector 5 is communicated with the air pump, the detection box 1 is inflated by the air pump, and after pressure maintaining for a period of time, the air pipe connector 5 is communicated with the air-tightness detector 8, and the pressure value is detected by the air-tightness detector 8.

[0046] In addition, at least one of the air vents 101 is detachably connected with the air-tight tool 9 to be tested, so that the detection box 1 can detect air-tight tools 9 of various types of explosion-proof valves, and the detection efficiency is improved.

[0047] As shown in Figure 3 The hand-operated lead screw 3 is rotationally connected with the piston assembly 2 through a rotating seat 31, wherein the rotating seat 31 is rotationally arranged at the lower end of the hand-operated lead screw 3, and the bottom thereof is fixedly connected with the top of the piston assembly 2. Specifically, the rotating seat 31 is inlaid with a bearing on the inner side, and the lower end of the hand-operated lead screw 3 is inlaid in the shaft hole of the bearing, so that the hand-operated lead screw 3 can only rotate horizontally. In this way, the connection between the hand-operated lead screw 3 and the piston assembly 2 is more stable, the rotational friction and vibration are reduced, the accuracy and smoothness of the lifting movement of the piston assembly 2 are ensured, the volume adjustment error caused by mechanical wear is avoided, and the service life of the equipment is prolonged.

[0048] In addition, the upper end of the hand-operated lead screw 3 is provided with a hand wheel, so as to facilitate the operation of the hand-operated lead screw 3.

[0049] As shown in Figure 3 The piston assembly 2 comprises a pressure plate 21 and a sealing ring 22, wherein the pressure plate 21 is fixedly connected with the rotating seat 31, and the outer periphery thereof is provided with an annular groove 2101; the sealing ring 22 is fixed in the annular groove 2101 and forms a reliable sliding sealing structure with the inner wall of the detection box 1. The leakage of gas from the gap between the piston assembly 2 and the inner wall of the detection box 1 during the detection process is effectively prevented, the air tightness of the volume adjustment is ensured, and the accuracy of the detection result is improved.

[0050] In addition, the sealing ring 22 is an O-ring, and at least two ring grooves 2101 are arranged, and one sealing ring 22 is arranged in each ring groove 2101, so that the air tightness is improved.

[0051] As shown in Figure 3 the top of the detection box 1 is threadedly connected with the hand-operated lead screw 3 through the lead screw nut 32, wherein the top of the detection box 1 is provided with a nut mounting hole 102; the lead screw nut 32 is fixed in the nut mounting hole 102; and the hand-operated lead screw 3 is threadedly connected with the lead screw nut 32. Through the structure, the transmission efficiency and the adjustment accuracy of the lifting of the piston assembly 2 are improved, the adjustable range of the inflation volume is ensured to be stable and controllable, and the detection error is further reduced.

[0052] As shown in Figure 2 the outer periphery of the air inlet 101 is provided with a plurality of bolt mounting holes 103, wherein the bolt mounting holes 103 penetrate through the side wall of the detection box 1 and are used for mounting bolts; and the sealing cover 4, the air pipe connecting piece 5 and the air tight tool 9 are boltedly connected with the corresponding bolt mounting holes 103. Through the structure, the installation and dismounting of the sealing cover 4, the air pipe connecting piece 5 and the air tight tool 9 are more convenient.

[0053] As shown in Figure 2 the air pipe connecting piece 5 comprises an air pipe joint 51, a flange plate 52 and a first sealing gasket 53, wherein the flange plate 52 is provided with a through hole 5201, one end of the air pipe joint 51 is threadedly connected in the through hole 5201, and the other end is connected with the air tightness detector 8 or the air pump through an air line; the end of the flange plate 52 away from the air pipe joint 51 is boltedly connected with the side of the detection box 1, and the flange plate 52 covers the air inlet 101 at the corresponding position; and the first sealing gasket 53 is clamped and fixed between the flange plate 52 and the detection box 1. The structure not only facilitates the connection of the detection box 1 and the air tightness detector 8, but also ensures that the flange plate 52 and the detection box 1 do not leak after the air pipe connecting piece 5 is installed, thereby ensuring the air tightness of the detection box 1.

[0054] In the above structure, the air pipe joint 51 is connected with the air tightness detector 8 or the air pump through a three-way pipeline, and a valve is arranged on each pipeline for controlling the opening and closing of the pipeline.

[0055] As shown in Figure 2 a second sealing gasket 11 is clamped and fixed between the detection box 1 and the air tight tool 9 for sealing between the air tight tool 9 and the detection box 1.

[0056] In addition, one side of the sealing cover 4 contacting the detection box 1 is provided with a rubber layer 401 for sealing between the sealing cover 4 and the detection box 1.

[0057] As shown in Figure 1As shown, the top of the detection box 1 is a hollow cylindrical structure, and the bottom is a hollow prism structure, wherein the piston assembly 2 is arranged in the hollow cylindrical structure; at least one air vent 101 is arranged on each side end face of the hollow prism structure. A plurality of mounting planes are formed through the structure, facilitating the mounting and fixing of the sealing cover 4, the air pipe connecting piece 5 and the air-tight tool 9.

[0058] As shown in the figure, Figure 1 The side wall of the detection box 1 is a transparent structure, and the surface is marked with vertical scale lines 104 for indicating the displacement amount of the piston assembly 2. In this way, the operator can intuitively observe the displacement amount of the piston assembly 2, which facilitates precise control of the volume adjustment amount. In addition, the transparent structure also facilitates real-time monitoring of the internal state, reduces human operation errors, and improves the controllability of the detection process.

[0059] In the above structure, the detection box 1 is made of transparent acrylic material, so that the side wall of the detection box 1 is a transparent structure, and it is also convenient to mark the scale lines 104.

[0060] It should be noted that the air-tight tool 9 includes a plug tool and an inflation tool, and during detection, one type of tool can be detected, or two types of tools can be detected simultaneously.

[0061] The use method of the explosion-proof valve air-tight tool detection box of the utility model is as follows:

[0062] During testing, the air pipe connecting piece 5 is installed on one of the air vents 101. Then the air-tight tool 9 to be detected is installed on the other air vent 101, and the sealing cover 4 is installed on the unused air vent 101. Rotate the hand crank 3 to raise and lower the piston assembly 2 to adjust the inflation volume inside the detection box 1 to an appropriate size. Inflate the detection box 1 through the air pipe connecting piece 5, and after pressure maintaining for a period of time, detect the pressure value inside the detection box 1 through the air-tight detector 8.

[0063] The above is only a preferred embodiment of the utility model, and does not limit the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims

1. An explosion-proof valve airtight tooling detection box, comprising a detection box (1), characterized in that: Further include piston assembly (2), hand screw (3), sealing cover (4) and air pipe connecting piece (5), wherein, The side of the detection box (1) is provided with a plurality of air vents (101), one of which is detachably connected to the air pipe connecting piece (5), at least one of which is detachably connected to the air tight tool (9) to be tested, and the rest of which is blocked by the sealing cover (4); The hand screw (3) is threadedly connected to the top of the detection box (1), and its lower end extends into the detection box (1) and is rotatably connected to the piston assembly (2); The hand screw (3) is used to drive the piston assembly (2) to move up and down inside the detection box (1) to adjust the inflation volume of the detection box (1), thereby simulating the inflation pressure state of different battery packs.

2. The air-tight tooling detection box for an explosion-proof valve according to claim 1, characterized in that: Further include a rotating seat (31), wherein, The rotating seat (31) is rotatably arranged at the lower end of the hand screw (3), and the bottom thereof is fixedly connected to the top of the piston assembly (2).

3. The air tight tooling detection box for explosion valve according to claim 2, characterized in that: The piston assembly (2) comprises a pressure plate (21) and a sealing ring (22), wherein, The pressure plate (21) is fixedly connected to the rotating seat (31), and the outer periphery thereof is provided with an annular groove (2101); The sealing ring (22) is fixed in the annular groove (2101) and forms a sliding seal with the inner wall of the detection box (1).

4. The air tight tooling detection box for explosion valve according to claim 1, characterized in that: Further include a screw nut (32), wherein, The top of the detection box (1) is provided with a nut mounting hole (102); The screw nut (32) is fixed in the nut mounting hole (102); The hand screw (3) is threadedly connected with the screw nut (32).

5. The air tight tooling detection box for explosion valve according to claim 1, characterized in that: The outer periphery of the air vent (101) is provided with a plurality of bolt mounting holes (103), wherein, The bolt mounting hole (103) penetrates the side wall of the detection box (1); The sealing cover (4), the air pipe connecting piece (5) and the air tight tool (9) are respectively bolted with the bolt mounting hole (103) at the corresponding position.

6. The air tight tooling detection box for explosion valve according to claim 5, characterized in that: The air pipe connecting piece (5) comprises an air pipe joint (51), a flange plate (52) and a first sealing gasket (53), wherein, The flange plate (52) is provided with a through hole (5201), one end of the air pipe joint (51) is threadedly connected in the through hole (5201), and the other end selectively communicates with the air pump or the air tightness detector (8) through the air line; The end of the flange plate (52) away from the air pipe joint (51) is bolted with the side of the detection box (1), and the flange plate (52) covers the air vent (101) at the corresponding position; The first sealing gasket (53) is clamped and fixed between the flange plate (52) and the detection box (1).

7. The air tight tooling detection box for explosion valve according to claim 1, characterized in that: The second sealing gasket (11) is clamped and fixed between the detection box (1) and the air tight tool (9).

8. The air tight tooling detection box for explosion valve according to claim 1, characterized in that: The top of the detection box (1) is a hollow cylindrical structure, and the bottom is a hollow prism structure, wherein, The piston assembly (2) is arranged in the hollow cylindrical structure; At least one air vent (101) is arranged on each side end surface of the hollow prism structure.

9. The air tight tooling detection box for explosion valve according to claim 1, characterized in that: The side wall of the detection box (1) is a transparent structure, and the surface is marked with vertical scale lines (104) for indicating the displacement amount of the piston assembly (2).

10. The air tight tooling detection box for explosion valve according to claim 1, characterized in that: The sealing cover (4) is provided with a rubber layer (401) on the side contacting the detection box (1).

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