Gas cylinder liner airtightness detection equipment

Abstract

The utility model relates to gas cylinder liner airtightness detection equipment, which comprises a base, a movable support, a sealing assembly and a pressure measuring assembly, the movable support and the sealing assembly are arranged on the base, and the movable support can move close to or away from the sealing assembly so as to clamp a gas cylinder inner container. The sealing assembly comprises a driving piece, a sealing piece, a pressure equalizing box and a first mounting frame; the first mounting frame is mounted on the base; the driving part is mounted on the first mounting frame, and the sealing part is mounted at the driving end; the sealing element is used for clamping a gas cylinder liner, and a clamping surface is provided with a first annular sealing structure and a second annular sealing structure; the first annular sealing structure is used for being in sealing connection with a valve seat of a gas cylinder liner; the second annular sealing structure is used for being in sealed connection with a sealing head of the gas cylinder liner to form a sealed space; the surge tank is communicated with the sealed space; the pressure measuring assembly is used for measuring the pressure in the pressure equalizing box. According to the utility model, the time required for airtightness detection is reduced, and the production efficiency of the gas cylinder liner is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to airtightness detection equipment technical field especially relates to a gas cylinder inner bag airtightness detection equipment. BACKGROUND

[0002] With the development of new energy vehicles and the soaring of domestic oil prices, many car owners choose new energy vehicles, including battery and hydrogen energy vehicles. Vehicle-mounted hydrogen storage technology mainly includes high-pressure gaseous hydrogen storage, low-temperature liquid hydrogen storage, solid hydrogen storage and organic liquid hydrogen storage. Among them, high-pressure hydrogen storage is highly valued due to its simple equipment structure, low energy consumption of compressed oxygen preparation, fast filling and discharging speed and other advantages, and is the current dominant hydrogen energy storage and transportation method. High-pressure hydrogen storage cylinders are divided into four types: type I, type II, type III and type IV. Type I cylinder is composed of metal steel, and type II cylinder mainly uses metal material, but the outer layer is wrapped with fiber composite material; type III and type IV cylinders are mainly based on carbon fiber reinforced plastic materials, the former has a metal liner, and the latter has a plastic liner, and the outside is processed by carbon fiber reinforced plastic winding. Type IV cylinder has obvious advantages in lightweight, high pressure, high hydrogen storage density and long service life. Type IV hydrogen storage cylinders have been mass-produced in Japan, South Korea, the United States and Norway, and other countries, and other countries also have plans to increase research efforts on type IV cylinders. In the development of type IV cylinders, the sealing performance of the plastic liner and the valve seat is a research hotspot. During the production of type IV cylinders, the plastic liner and the valve seat connecting joint need to be checked for low-pressure airtightness, i.e. the connection between the plastic liner and the valve seat needs to be checked for airtightness. At present, the common method is to fill a certain pressure gas into the plastic liner, and then measure the pressure change after pressure maintaining for a certain time. This kind of measuring equipment has a long measuring time, which reduces the production efficiency. The above problems need to be solved urgently. CONTENT OF THE UTILITY MODEL

[0003] The utility model discloses a kind of gas cylinder inner bag airtightness detection equipment, to solve the technical problems existing in prior art.

[0004] The utility model discloses the following technical solutions:

[0005] The utility model provides a kind of gas cylinder inner container air tightness detection equipment, it includes base, mobile support, sealing assembly and pressure measuring component;The mobile support and the sealing assembly are respectively arranged on the base, and the mobile support can be moved to hold gas cylinder inner container by being close to or away from the sealing assembly;The sealing assembly includes driving part, sealing element, equalizing tank and first mounting bracket;The first mounting bracket is installed on the base;The driving part is installed on the first mounting bracket, and driving end installs the sealing element;The sealing element is used to hold the gas cylinder inner container, and clamping surface has first annular sealing structure and second annular sealing structure;The first annular sealing structure is used to be sealedly connected with the valve seat of the gas cylinder inner container;The second annular sealing structure is used to be sealedly connected with the head of the gas cylinder inner container, to form sealed space;The equalizing tank is communicated with the sealed space;The pressure measuring component is used to measure the pressure in the equalizing tank.

[0006] In the utility model of a kind of gas cylinder inner container air tightness detection equipment, the mobile support includes support, first slider sliding rail component and linear drive component;The sliding rail of the first slider sliding rail component is fixed on the base, and slider is installed on the support;The linear drive component is installed on the base, and driving end drives the support to move.

[0007] In the utility model of a kind of gas cylinder inner container air tightness detection equipment, the linear drive component includes motor and first lead screw;The motor is used to drive the first lead screw to rotate;The first lead screw is used to drive the support to move.

[0008] In the utility model of a kind of gas cylinder inner container air tightness detection equipment, the sealing assembly further includes first adjusting part and second mounting bracket;The first adjusting part is installed on the first mounting bracket, for driving the second mounting bracket to move vertically;The second mounting bracket is installed on the driving part.

[0009] In the utility model of a kind of gas cylinder inner container air tightness detection equipment, the first adjusting part includes second slider sliding rail component, second lead screw and first hand wheel;The sliding rail of the second slider sliding rail component is fixed on the first mounting bracket, and slider is connected with the second mounting bracket;The second lead screw is used to drive the second mounting bracket to move vertically;The first hand wheel is connected to the second lead screw, for driving the second lead screw to rotate.

[0010] In the utility model of a kind of gas cylinder inner container air tightness detection equipment, the sealing assembly further includes first guide rod and first guide sleeve;The first guide rod is parallelly arranged along the driving direction of the driving part, and one end is fixed to the sealing element, and the other end is threaded in the first guide sleeve;The first guide sleeve is installed on the second mounting bracket.

[0011] In the gas cylinder inner container air tightness detection equipment, the first guide sleeve is penetrated through the second mounting frame at both ends.

[0012] In the gas cylinder inner container air tightness detection equipment, the sealing element comprises a main body, a first annular structure and a second annular structure; the first annular structure and the second annular structure are sealingly connected to the same side of the main body; the first annular structure is sealingly connected to the first annular sealing structure at the inner side edge; the second annular structure is arranged inside the first annular sealing structure, and the inner side edge is sealingly connected to the second annular sealing structure.

[0013] In the gas cylinder inner container air tightness detection equipment, the number of sealing assemblies is 2, one of the sealing assemblies is installed on the movable support, and the other is fixedly arranged on the base; the two sealing assemblies jointly clamp the gas cylinder inner container.

[0014] In the gas cylinder inner container air tightness detection equipment, the number of sealing assemblies is 2, one of the sealing assemblies is installed on the movable support, and the other is fixedly arranged on the base; the two sealing assemblies jointly clamp the gas cylinder inner container.

[0015] The technical scheme of the gas cylinder inner container air tightness detection equipment can achieve the following beneficial effects:

[0016] The gas cylinder inner container air tightness detection equipment provided by the utility model mainly provides a kind of gas cylinder inner container air tightness detection equipment, based on movable support and sealing assembly to the gas cylinder inner container to be detected clamping fixed, and with the first annular sealing structure and the second annular sealing structure on sealing element are respectively sealed with the head and valve seat of gas cylinder inner container Connection, thus form closed space between the first annular sealing structure and the second annular sealing structure, connect this closed space and equalizing chamber, and with pressure measuring assembly to the pressure of equalizing chamber is measured, without filling pressure to gas cylinder inner container, then reduce the time required for air tightness detection, improve the production efficiency of gas cylinder inner container, and with the abutment of sealing element realizes sealing, can adapt to large quantities of sealing detection work. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will be briefly introduced to the drawings needed to be used in embodiment description, constitutes the part of the utility model, the illustrative embodiment of the utility model and its explanation explain the utility model, and do not constitute improper limitation to the utility model. In the drawings:

[0018] Figure 1 It is the front view structural schematic diagram of the gas cylinder inner container air tightness detection equipment of the utility model;

[0019] Figure 2 It is the three-dimensional structural schematic diagram of the gas cylinder inner container air tightness detection equipment of the utility model;

[0020] Figure 3 It is a three-dimensional structure schematic view of the sealing element of the utility model.

[0021] Mark explanation:

[0022] 1. base; 2. mobile support; 21. support; 22. first slider rail assembly; 23. linear drive assembly; 231. motor; 232. first lead screw; 3. sealing assembly; 31. driving element; 32. sealing element; 321. first annular sealing structure; 322. second annular sealing structure; 323. main body; 324. first annular structure; 325. second annular structure; 33. pressure equalizing box; 34. first mounting bracket; 35. first adjusting element; 351. second slider rail assembly; 352. second lead screw; 353. first hand wheel; 36. second mounting bracket; 37. first guide rod; 38. first guide sleeve; 4. pressure measuring assembly; 5. fixing assembly; 51. fixing plate; 511. fixing hole; 52. fixing rod. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the utility model more clear, the following will combine the utility model specific embodiment and corresponding drawings to make clear, complete description to the utility model technical scheme. In the description of the utility model, it needs to be explained that, the term " or " usually is with the meaning of " and / or " is used, unless the content is otherwise explicitly pointed out.

[0024] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the term " install " " connect " " connection " should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be magnetic connection;Can be directly connected, also can be indirectly connected through intermediate medium, can be two elements inside the communication. For ordinary skilled in the art, the above-mentioned terms in the utility model can be understood according to the specific meaning of the specific situation. In addition, in the description of the present application, the term " first " " second " etc. are only used for distinguishing description, and cannot be understood as indicating or implying relative importance. In the description of the utility model, the meaning of " multiple " is at least two, for example, two, three or more, etc. Unless otherwise explicitly specified.

[0025] Obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary skilled in the art without making creative labor belong to the scope of the utility model protection.

[0026] To solve the problems existing in the prior art, the embodiment of the present application provides a gas cylinder inner container air tightness detection equipment.

[0027] As shown in Figure 1 and 2 , a gas cylinder liner airtightness detection equipment, it includes base 1, mobile support 2, sealing assembly 3 and pressure measuring assembly 4;Mobile support 2 and sealing assembly 3 are arranged on base 1 respectively, and mobile support 2 can move close to or away from sealing assembly 3 to hold gas cylinder liner;Sealing assembly 3 includes driving part 31, sealing part 32, pressure equalizing box 33 and first mounting bracket 34;First mounting bracket 34 is installed on base 1;Driving part 31 is installed on first mounting bracket 34, and the driving end installs sealing part 32;Sealing part 32 is used for clamping gas cylinder liner, and the clamping surface has first annular sealing structure 321 and second annular sealing structure 322;First annular sealing structure 321 is used for sealing connection with the valve seat of gas cylinder liner;Second annular sealing structure 322 is used for sealing connection with the head of gas cylinder liner, to form a sealed space, specifically, first annular sealing structure 321 and second annular sealing structure 322 are abutted by driving part 31;Pressure equalizing box 33 communicates with the sealed space;Pressure measuring assembly 4 is used for measuring the pressure in pressure equalizing box 33.

[0028] The utility model discloses a kind of gas cylinder liner airtightness detection equipment, based on mobile support and sealing assembly to the gas cylinder liner to be detected clamping fixation, and with the first annular sealing structure and the second annular sealing structure on sealing piece are respectively sealed with the head and valve seat of gas cylinder liner, to form closed space between the first annular sealing structure and the second annular sealing structure, connect this closed space and pressure equalizing box, and measure the pressure of pressure equalizing box by pressure measuring assembly, without pressurizing gas cylinder liner, so as to reduce the time required for airtight detection, improve gas cylinder liner production efficiency, and sealing is realized by the way of sealing piece abutment, can adapt to large quantities of airtightness detection work.

[0029] In some preferred embodiments, driving part 31 is a gas cylinder, and the cylinder piston is parallel to the axis of the gas cylinder liner.

[0030] In some preferred embodiments, pressure measuring assembly 4 is a pressure gauge.

[0031] In some preferred embodiments, first annular sealing structure 321 and second annular sealing structure 322 are elastic sealing rings.

[0032] In some preferable embodiments, the moving support 2 comprises a support 21, a first sliding block sliding rail assembly 22 and a linear driving assembly 23; the sliding rail of the first sliding block sliding rail assembly 22 is fixed on the base 1, and the sliding block is installed on the support 21; the linear driving assembly 23 is installed on the base 1, and the driving end drives the support 21 to move; the moving direction of the support 21 by the first sliding block sliding rail assembly 22 is guided, and the guiding direction is parallel to the axial direction of the cylinder liner, so that the clamping of the cylinder liner is more stable; preferably, the support 21 is a saddle.

[0033] Preferably, the linear driving assembly 23 can be a motor cooperating with a gear rack or a lead screw to realize linear driving.

[0034] In some preferable embodiments, the linear driving assembly 23 comprises a motor 231 and a first lead screw 232; the motor 231 is used to drive the first lead screw 232 to rotate; the first lead screw 232 is used to drive the support 21 to move; by taking the lead screw as a transmission member, the pushing effect on the cylinder liner can be improved, the sealing performance of the sealing assembly 3 can be ensured, the radial stress of the motor 231 can be reduced, and the service life of the motor 231 can be improved; specifically, the extension direction of the first lead screw 232 is parallel to the axial direction of the cylinder liner.

[0035] In some preferable embodiments, the sealing assembly 3 further comprises a first adjusting member 35 and a second mounting bracket 36; the first adjusting member 35 is installed on the first mounting bracket 34 and is used to drive the second mounting bracket 36 to move vertically; the driving member 31 is installed on the second mounting bracket 36; based on the setting of the first adjusting member 35, the position of the driving member 31 can be adjusted, so as to adapt to cylinder liners of different diameters and improve the application range.

[0036] In some preferable embodiments, the first adjusting member 35 comprises a second sliding block sliding rail assembly 351, a second lead screw 352 and a first hand wheel 353; the sliding rail of the second sliding block sliding rail assembly 351 is fixed on the first mounting bracket 34, and the sliding block is connected to the second mounting bracket 36; the second lead screw 352 is used to drive the second mounting bracket 36 to move vertically; the first hand wheel 353 is connected to the second lead screw 352 and is used to drive the second lead screw 352 to rotate; by taking the second lead screw 352 as a transmission member, the position of the second mounting bracket 36 can be continuously adjusted, and the second mounting bracket 36 is guided by the second sliding block sliding rail assembly 351 to ensure the accuracy of the moving position, so that the connection position between the valve seat and the head of the cylinder liner to be detected can be accurately sealed.

[0037] In some preferred embodiments, the sealing assembly 3 further comprises a first guide rod 37 and a first guide sleeve 38; the first guide rod 37 is arranged in parallel with the driving direction of the driving member 31, and one end of the first guide rod 37 is fixed to the sealing member 32, and the other end of the first guide rod 37 is inserted into the first guide sleeve 38; the first guide sleeve 38 is installed on the second mounting bracket 36; the first guide rod 37 and the first guide sleeve 38 reduce the stress of the driving member 31, prolong the service life of the driving member 31, and make the driving direction of the driving member 31 more accurate.

[0038] Preferably, the first guide rod 37 and the first guide sleeve 38 are in clearance fit.

[0039] Preferably, the first guide sleeve 38 penetrates through the second mounting bracket 36 at both ends.

[0040] In some preferred embodiments, as shown in Figure 3 the sealing member 32 comprises a main body 323, a first annular structure 324 and a second annular structure 325; the first annular structure 324 and the second annular structure 325 are sealingly connected to the same side of the main body 323; the inner side edge of the first annular structure 324 is sealingly connected to the first annular sealing structure 321; the second annular structure 325 is arranged inside the first annular sealing structure 321, and the inner side edge of the second annular structure 325 is sealingly connected to the second annular sealing structure 322; preferably, the first annular structure 324 and the second annular structure 325 are coaxially arranged.

[0041] In some preferred embodiments, the number of the sealing assembly 3 is 2; one of the sealing assembly 3 is installed on the mobile support 2, and the other is fixedly arranged on the base 1; the two sealing assemblies 3 jointly clamp the gas cylinder inner container; based on the arrangement of the two sealing assemblies 3, the gas cylinder inner container which needs to be sealed and tested on both sides can be tested.

[0042] In some preferred embodiments, the fixing assembly 5 is further included; the fixing assembly 5 is used to fix the relative position of the base 1 and the mobile support 2.

[0043] Preferably, the fixing assembly 5 comprises a fixing plate 51 and a fixing rod 52; the fixing plate 51 is arranged on the base 1, and a plurality of fixing holes 511 are arranged at intervals along the moving direction of the mobile support 2; one end of the fixing rod 52 penetrates through the mobile support 2 and is inserted into the fixing hole 511.

[0044] The embodiments of the utility model are described above in combination with the drawings, but the utility model is not limited to the above-mentioned specific embodiments, and the above-mentioned specific embodiments are only illustrative but not restrictive, and those skilled in the art can make many forms under the inspiration of the utility model without departing from the purpose of the utility model and the scope protected by the claims, and all of them belong to the protection of the utility model.

Claims

1. A gas cylinder liner airtightness detection device, characterized in that, The device comprises a base, a moving support, a sealing assembly and a pressure measuring assembly; The moving support and the sealing assembly are arranged on the base respectively, and the moving support can move close to or away from the sealing assembly to clamp the inner container of the gas cylinder; The sealing assembly comprises a driving member, a sealing member, an equalizing box and a first mounting frame; The first mounting frame is mounted on the base; The driving member is mounted on the first mounting frame, and the driving end is mounted on the sealing member; The sealing member is used to clamp the inner container of the gas cylinder, and the clamping surface has a first annular sealing structure and a second annular sealing structure; the first annular sealing structure is used to be in sealing connection with the valve seat of the inner container of the gas cylinder; and the second annular sealing structure is used to be in sealing connection with the head of the inner container of the gas cylinder to form a sealed space; The equalizing box is communicated with the sealed space; The pressure measuring assembly is used to measure the pressure in the equalizing box.

2. The gas cylinder liner airtightness detection equipment according to claim 1, characterized in that, The moving support comprises a support, a first sliding block sliding rail assembly and a linear driving assembly; The sliding rail of the first sliding block sliding rail assembly is fixed on the base, and the sliding block is mounted on the support; The linear driving assembly is mounted on the base, and the driving end drives the support to move.

3. The gas cylinder liner airtightness detection equipment according to claim 2, characterized in that, The linear driving assembly comprises a motor and a first lead screw; The motor is used to drive the first lead screw to rotate; The first lead screw is used to drive the support to move.

4. The gas cylinder liner airtightness detection equipment according to claim 1, characterized in that, The sealing assembly further comprises a first adjusting member and a second mounting frame; The first adjusting member is mounted on the first mounting frame and is used to drive the second mounting frame to move vertically; The driving member is mounted on the second mounting frame.

5. The gas cylinder liner airtightness detection equipment according to claim 4, characterized in that, The first adjusting member comprises a second sliding block sliding rail assembly, a second lead screw and a first hand wheel; The sliding rail of the second sliding block sliding rail assembly is fixed on the first mounting frame, and the sliding block is connected to the second mounting frame; The second lead screw is used to drive the second mounting frame to move vertically; The first hand wheel is connected to the second lead screw and is used to drive the second lead screw to rotate.

6. The gas cylinder liner airtightness detection equipment according to claim 4, characterized in that, The sealing assembly further comprises a first guide rod and a first guide sleeve; The first guide rod is arranged in parallel along the driving direction of the driving member, one end of the first guide rod is fixed to the sealing member, and the other end of the first guide rod is fitted into the first guide sleeve; The first guide sleeve is mounted on the second mounting frame.

7. The gas cylinder liner airtightness detection equipment according to claim 6, characterized in that, The first guide sleeve penetrates through the second mounting frame at both ends.

8. The gas cylinder liner airtightness detection equipment according to claim 6, characterized in that, The sealing member comprises a main body, a first annular structure and a second annular structure; The first annular structure and the second annular structure are sealingly connected to the same side of the main body; The inner side edge of the first annular structure is sealingly connected to the first annular sealing structure; The second annular structure is arranged inside the first annular sealing structure, and the inner side edge of the second annular structure is sealingly connected to the second annular sealing structure.

9. The gas cylinder liner airtightness detection equipment according to claim 1, characterized in that, The number of the sealing assemblies is two, one of the sealing assemblies is mounted on the moving support, and the other is fixedly arranged on the base, and the two sealing assemblies clamp the inner container of the gas cylinder together.

10. The gas cylinder liner airtightness detection equipment according to claim 1, characterized in that, Further comprising a fixing assembly; The fixing assembly is used to fix the relative positions of the base and the moving support.

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