A quick clamping sealing device for accumulator pressure testing and method of use thereof

Abstract

The application relates to the technical field of accumulators, in particular to a quick clamping and sealing device for accumulator pressure testing and a use method thereof, which comprises a pressure testing machine body, an upper sealing structure, an accumulator shell and a lower sealing structure, the inner side of the pressure testing machine body is provided with the upper sealing structure and the lower sealing structure arranged in an up-down mode, and the accumulator shell is arranged between the upper sealing structure and the lower sealing structure; the lower sealing structure comprises a first shell, a first inner core, a first top head and a first piston block, the inner side of the first shell is slidably connected with the first piston block, the inner side of the first piston block is provided with the first inner core, the top end of the first inner core is provided with the first top head, and the bottom end of the first inner core is provided with a liquid inlet pipe; in the application, the sealing property of the accumulator shell during pressure testing can be effectively guaranteed, the sealing structure of the device can be automatically strengthened and adjusted during clamping and use, the testing speed and efficiency are effectively improved, and manpower is saved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of accumulators, in particular to a quick clamping and sealing device for accumulator pressure testing and a use method thereof. BACKGROUND

[0002] An accumulator is an energy storage device in a hydraulic pneumatic system, which converts the energy in the system into compressed energy or potential energy at an appropriate time and stores the energy, and when the system needs it, the compressed energy or potential energy is converted into hydraulic pressure or air pressure and released to supply the system again. Since the accumulator needs to withstand a large pressure, when a quality problem occurs, it will cause great harm, therefore, the accumulator needs to be tested for pressure. Most of the accumulator pressure testing sealing devices on the market are designed to be relatively complex, when the accumulator shell is installed, a sealing structure needs to be manually set separately, thereby not only wasting a lot of manpower, but also reducing the testing speed and efficiency, and being not conducive to large-scale popularization and use, therefore, the application provides a quick clamping and sealing device for accumulator pressure testing and a use method thereof. SUMMARY

[0003] The application aims to provide a quick clamping and sealing device for accumulator pressure testing and a use method thereof, so as to solve the problems that the existing accumulator pressure testing sealing device is designed to be relatively complex, when the accumulator shell is installed, a sealing structure needs to be manually set separately, thereby not only wasting a lot of manpower, but also reducing the testing speed and efficiency, and being not conducive to large-scale popularization and use.

[0004] To achieve the above-mentioned purpose, the application provides the following technical scheme:

[0005] A quick clamping and sealing device for accumulator pressure testing, comprising a pressure testing machine main body, an upper sealing structure, an accumulator shell and a lower sealing structure, wherein the inner side of the pressure testing machine main body is provided with the upper sealing structure and the lower sealing structure arranged in an up-down mode, and the accumulator shell is arranged between the upper sealing structure and the lower sealing structure.

[0006] The lower sealing structure comprises a first shell, a first inner core, a first top head and a first piston block, the inner side of the first shell is slidably connected with the first piston block, the inner side of the first piston block is provided with the first inner core, the top end of the first inner core is provided with the first top head, the bottom end of the first inner core is provided with a liquid inlet pipe, and the top end of the first shell is provided with a first sleeve gland.

[0007] The top end of the first piston block is provided with a fifth sealing ring, the outer side of the first top head is provided with a groove, and the inner side of the groove is embedded with a first accumulator radial sealing ring, the inner side of the first top head is provided with a first through hole, and the other end of the first through hole is arranged on the inner side of the first accumulator radial sealing ring.

[0008] The upper sealing structure comprises a second outer shell, a second inner core, a second piston block and a second sleeve gland, the inner side of the second outer shell is slidably provided with the second piston block, the inner side of the second piston block is slidably provided with the second inner core, the bottom end of the second inner core is provided with a second top head, and the outer side of the second piston block is provided with the second sleeve gland.

[0009] The inner side of the second top head is provided with a connecting hole coaxially arranged, the two sides of the connecting hole are communicated with a second through hole, the outer side of the second through hole is provided with a second accumulator radial seal ring, and the second accumulator radial seal ring is sleeved on the second top head.

[0010] The first piston block and the second piston block are in a state close to the first top head and the second top head, and the first accumulator radial seal ring and the second accumulator radial seal ring are shielded, the upper sealing structure is driven to move downward by the hydraulic structure of the pressure tester main body, the first top head and the second top head are clamped to the inner side of the accumulator shell, the accumulator shell extrudes the first piston block and the second piston block, the first accumulator radial seal ring and the second accumulator radial seal ring are exposed, high-pressure medium is injected through the liquid inlet pipe, the high-pressure medium extrudes the first accumulator radial seal ring and the second accumulator radial seal ring through the first through hole and the second through hole, and the outer sides of the first accumulator radial seal ring and the second accumulator radial seal ring are attached to the opening of the accumulator shell.

[0011] Preferably, the outer side of the first piston block is provided with a groove, and the inner side of the groove is provided with a first piston block seal ring, the number of the first piston block seal ring is 2-4, and the first piston block seal ring is uniformly distributed on the outer side of the first piston block.

[0012] Preferably, a first seal ring is installed between the first inner core and the first top head, a second seal ring is installed between the first inner core and the liquid inlet pipe, and a fourth seal ring is installed on the outer side of the first inner core.

[0013] Preferably, the inner side of the first outer shell is provided with a mounting hole, and the first outer shell is mounted on the pressure tester main body through the mounting hole, and the second outer shell is mounted on the hydraulic structure of the pressure tester main body through the fixing plate.

[0014] Preferably, the outer side of the first outer shell is provided with a first air inlet hole, and the first air inlet hole is located at the bottom end of the first piston block, the outer side of the second outer shell is provided with a second air inlet hole, and the second air inlet hole is located at the top end of the second piston block.

[0015] Preferably, the outer side of the second piston block is uniformly provided with a sixth seal ring, and the outer side of the sixth seal ring is attached to the second outer shell, and a seventh seal ring is installed between the second piston block and the second inner core.

[0016] A method for using a quick clamping and sealing device for accumulator pressure testing, comprising the following steps:

[0017] Step one: first connect the high-pressure gas pipe outside the first inlet hole and the second inlet hole, so that the first piston block and the second piston block are in the state of being close to the first top head and the second top head, thereby shielding the first accumulator radial seal ring and the second accumulator radial seal ring, and then the accumulator shell is installed on the lower sealing structure of the pressure testing machine body, and then the upper sealing structure is driven to move downward by the hydraulic structure of the pressure testing machine body, so that the upper sealing structure is installed on the accumulator shell, the first top head and the second top head are clamped to the inner side of the accumulator shell, and the accumulator shell will extrude the first piston block and the second piston block, so that the first piston block and the second piston block are retracted inward, so that the first accumulator radial seal ring and the second accumulator radial seal ring are exposed, and the arrangement of the first piston block seal ring, the fourth seal ring, the sixth seal ring and the seventh seal ring ensures the sealing effect when the first piston block and the second piston block slide, and the arrangement of the fifth seal ring and the third seal ring preliminarily ensures the sealing property of the accumulator shell connected with the device;

[0018] Step two: inject high-pressure medium through the liquid inlet pipe, and the high-pressure medium will extrude the first accumulator radial seal ring and the second accumulator radial seal ring when testing the pressure of the accumulator shell through the first through hole and the second through hole, so that the outer side of the first accumulator radial seal ring and the second accumulator radial seal ring is better attached to the opening of the accumulator shell, thereby effectively enhancing the sealing effect.

[0019] Compared with the prior art, the beneficial effects of the present application are:

[0020] In the present application, not only the sealing property of the energy storage device shell during pressure testing can be effectively ensured, but also the sealing structure of the device can be automatically adjusted during clamping and use, effectively improving the testing speed and efficiency, and saving manpower. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a whole schematic view of the lower sealing structure of the present application;

[0022] Figure 2 It is an installation schematic view of the lower sealing structure of the present application;

[0023] Figure 3 It is a whole schematic view of the pressure testing machine of the present application;

[0024] Figure 4 It is a whole schematic view of the upper sealing structure of the present application;

[0025] Figure 5 Figure 1 is a schematic view of a first piston block ejection state.

[0026] In the figure: 1, pressure testing machine main body; 2, upper sealing structure; 3, accumulator shell; 4, lower sealing structure; 5, first inner core; 6, first outer sleeve gland; 7, second sealing ring; 8, fifth sealing ring; 9, first accumulator radial sealing ring; 10, first top head; 11, liquid inlet pipe; 12, first sealing ring; 13, first shell; 14, first piston block; 15, first piston block sealing ring; 16, fourth sealing ring; 17, mounting hole; 18, first air inlet hole; 19, second shell; 20, second piston block; 21, second inner core; 22, second top head; 23, second air inlet hole; 24, sixth sealing ring; 25, seventh sealing ring; 26, third sealing ring; 27, second accumulator radial sealing ring; 28, second outer sleeve gland. DETAILED DESCRIPTION

[0027] Example 1: Please refer to Figures 1-5 The present application provides a technical solution:

[0028] A kind of quick clamping sealing device for accumulator pressure test, including pressure testing machine main body 1, upper sealing structure 2, accumulator shell 3 and lower sealing structure 4, the inner side of pressure testing machine main body 1 is installed with the upper and lower sealing structure 2 and lower sealing structure 4 arranged, accumulator shell 3 is installed between upper sealing structure 2 and lower sealing structure 4;

[0029] Lower sealing structure 4 includes first shell 13, first inner core 5, first top head 10 and first piston block 14, the inner side of first shell 13 is slidably connected with first piston block 14, the inner side of first piston block 14 is installed with first inner core 5, the top of first inner core 5 is installed with first top head 10, the bottom of first inner core 5 is installed with liquid inlet pipe 11, and the top of first shell 13 is installed with first outer sleeve gland 6;

[0030] The top of first piston block 14 is installed with fifth sealing ring 8, the outer side of first top head 10 is provided with recess, and first accumulator radial sealing ring 9 is embedded in the inner side of recess, and first through hole is formed in the inner side of first top head 10, and the other end of first through hole is arranged in the inner side of first accumulator radial sealing ring 9;

[0031] Upper sealing structure 2 includes second shell 19, second inner core 21, second piston block 20 and second outer sleeve gland 28, the inner side of second shell 19 is slidably connected with second piston block 20, the inner side of second piston block 20 is slidably connected with second inner core 21, the bottom of second inner core 21 is installed with second top head 22, and the outer side of second piston block 20 is installed with second outer sleeve gland 28;

[0032] The first top head 10 is installed above the inside of the first inner core 5, and the first piston block 14 is arranged outside the first top head, and the first top head 10 and the first piston block 14 are arranged inside the first outer sleeve cover 6.

[0033] The inside of the second top head 22 is provided with a connecting hole coaxially arranged, and the two sides of the connecting hole are communicated with a second through hole, and the outside of the second through hole is provided with a second accumulator radial sealing ring 27, and the second accumulator radial sealing ring 27 is sleeved on the second top head 22, and the bottom end of the second piston block 20 is provided with a third sealing ring 26, and the first piston block 14 and the second piston block 20 are in the state of being close to the first top head 10 and the second top head 22, and the first accumulator radial sealing ring 9 and the second accumulator radial sealing ring 27 are protected, and the upper sealing structure 2 is driven to move downward by the hydraulic structure of the pressure testing machine main body 1, the first top head 10 and the second top head 22 are clamped to the inside of the accumulator shell 3, the accumulator shell 3 extrudes the first piston block 14 and the second piston block 20, so that the first piston block 14 and the second piston block 20 are withdrawn to the inside, the first accumulator radial sealing ring 9 and the second accumulator radial sealing ring 27 are exposed, the high-pressure medium extrudes the first accumulator radial sealing ring 9 and the second accumulator radial sealing ring 27 through the first through hole and the second through hole, and the outside of the first accumulator radial sealing ring 9 and the second accumulator radial sealing ring 27 is attached to the opening of the accumulator shell 3. This setting not only can effectively guarantee the sealing property of the energy storage device shell during pressure test, but also can automatically strengthen the adjustment of the sealing structure of the device during clamping use, effectively improve the test speed and efficiency, and save manpower.

[0034] The outer side of the first piston block 14 is provided with a groove, and the inner side of the groove is provided with a first piston block sealing ring 15, the number of the first piston block sealing ring 15 is 2, and the first piston block sealing ring 15 is evenly distributed on the outer side of the first piston block 14; a first sealing ring 12 is installed between the first inner core 5 and the first top head 10, a second sealing ring 7 is installed between the first inner core 5 and the liquid inlet pipe 11, a fourth sealing ring 16 is installed on the outer side of the first inner core 5, a sixth sealing ring 24 is evenly installed on the outer side of the second piston block 20, and the outer side of the sixth sealing ring 24 is attached to the second outer shell 19, a seventh sealing ring 25 is installed between the second piston block 20 and the second inner core 21, which effectively ensures the sealing between the structures of the device during use; the inner side of the first outer shell 13 is provided with a mounting hole 17, and the first outer shell 13 is installed on the pressure testing machine body 1 through the mounting hole 17, and the second outer shell 19 is installed on the hydraulic structure of the pressure testing machine body 1 through the fixing plate, which ensures the stable installation of the device; the outer side of the first outer shell 13 is provided with a first air inlet hole 18, and the first air inlet hole 18 is located at the bottom end of the first piston block 14, the outer side of the second outer shell 19 is provided with a second air inlet hole 23, and the second air inlet hole 23 is located at the top end of the second piston block 20, which can effectively enhance the sealing of the connection during pressure testing.

[0035] A use method of a quick clamping and sealing device for accumulator pressure testing, comprising the following steps:

[0036] Step one: first, connect the high-pressure air pipe to the outer side of the first air inlet hole 18 and the second air inlet hole 23, so that the first piston block 14 and the second piston block 20 are in a state close to the first top head 10 and the second top head 22, thereby shielding the first accumulator radial sealing ring 9 and the second accumulator radial sealing ring 27, thereby protecting the first accumulator radial sealing ring 9 and the second accumulator radial sealing ring 27, then install the accumulator shell 3 on the lower sealing structure 4 of the pressure testing machine body 1, then drive the upper sealing structure 2 to move downward through the hydraulic structure of the pressure testing machine body 1, so that the upper sealing structure 2 is installed on the accumulator shell 3, so that the first top head 10 and the second top head 22 are clamped to the inner side of the accumulator shell 3, and the accumulator shell 3 will press the first piston block 14 and the second piston block 20, so that the first piston block 14 and the second piston block 20 are retracted inward, so that the first accumulator radial sealing ring 9 and the second accumulator radial sealing ring 27 are exposed, the setting of the first piston block sealing ring 15, the fourth sealing ring 16, the sixth sealing ring 24 and the seventh sealing ring 25 ensures the sealing effect when the first piston block 14 and the second piston block 20 slide, and the setting of the fifth sealing ring 8 and the third sealing ring 26 preliminarily ensures the sealing of the connection between the accumulator shell 3 and the device;

[0037] Step two: inject high pressure medium through the inlet pipe 11, the high pressure medium will extrude the first accumulator radial seal ring 9 and the second accumulator radial seal ring 27 through the first through hole and the second through hole while testing the pressure of the accumulator shell 3, and then make the outer side of the first accumulator radial seal ring 9 and the second accumulator radial seal ring 27 better fit at the opening of the accumulator shell 3, thereby effectively enhancing the sealing effect.

[0038] The principles and implementation manners of the present application are described by applying specific examples in the present application, and the above examples are only used to help understand the method of the present application and its core idea. The above description is only the preferred implementation manner of the present application, and it should be pointed out that, due to the limitation of the expression, there are infinite specific structures, and for ordinary skilled in the art, some improvements, decorations or changes can be made without departing from the principles of the present application, and the above technical features can be combined in a proper way; the improvements, decorations, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, shall be regarded as the protection scope of the present application.

Claims

1. A quick clamping sealing device for accumulator pressure testing, comprising a pressure testing machine body (1), an upper sealing structure (2), an accumulator housing (3) and a lower sealing structure (4), characterized in that: An upper sealing structure (2) and a lower sealing structure (4) are installed on the inner side of the pressure testing machine body (1), and an accumulator housing (3) is installed between the upper sealing structure (2) and the lower sealing structure (4); The lower sealing structure (4) comprises a first outer shell (13), a first inner core (5), a first top head (10) and a first piston block (14); the first outer shell (13) is slidably connected to the inner side of the first piston block (14); the first inner core (5) is installed on the inner side of the first piston block (14); the first top head (10) is installed on the top end of the first inner core (5); the liquid inlet pipe (11) is installed on the bottom end of the first inner core (5); and the first outer cover (6) is installed on the top end of the first outer shell (13); A fifth sealing ring (8) is installed at the top end of the first piston block (14); a groove is provided on the outer side of the first top head (10), and a first accumulator radial sealing ring (9) is embedded in the inner side of the groove; a first through hole is provided on the inner side of the first top head (10), and the other end of the first through hole is arranged on the inner side of the first accumulator radial sealing ring (9); The upper sealing structure (2) comprises a second outer shell (19), a second inner core (21), a second piston block (20) and a second outer cover (28); the second piston block (20) slides on the inner side of the second outer shell (19); the second inner core (21) slides on the inner side of the second piston block (20); a second top head (22) is installed at the bottom end of the second inner core (21); and the second outer cover (28) is installed on the outer side of the second piston block (20); A coaxially arranged connecting hole is provided on the inner side of the second top head (22), and second through holes are connected on both sides of the connecting hole. A second accumulator radial sealing ring (27) is provided on the outer side of the second through hole, and the second accumulator radial sealing ring (27) is sleeved on the second top head (22). A third sealing ring (26) is installed at the bottom end of the second piston block (20); The first piston block (14) and the second piston block (20) are in a state close to the first ram (10) and the second ram (22), shielding the first accumulator radial sealing ring (9) and the second accumulator radial sealing ring (27). The upper sealing structure (2) is driven downward by the hydraulic structure of the pressure testing machine body (1). The first ram (10) and the second ram (22) are engaged with the inner side of the accumulator housing (3). The accumulator housing (3) squeezes the first piston block (14) and the second piston block (20). The first accumulator radial sealing ring (9) and the second accumulator radial sealing ring (27) are exposed. High-pressure medium is injected through the liquid inlet pipe (11). The high-pressure medium squeezes the first accumulator radial sealing ring (9) and the second accumulator radial sealing ring (27) through the first through hole and the second through hole. The outer sides of the first accumulator radial sealing ring (9) and the second accumulator radial sealing ring (27) are attached to the opening of the accumulator housing (3).

2. The quick clamping sealing device for accumulator pressure testing according to claim 1, characterized in that: A groove is provided on the outer side of the first piston block (14), and a first piston block sealing ring (15) is installed on the inner side of the groove. The number of the first piston block sealing rings (15) is 2-4, and the first piston block sealing rings (15) are evenly distributed on the outer side of the first piston block (14).

3. The quick clamping and sealing device for accumulator pressure testing according to claim 2, characterized in that: A first sealing ring (12) is installed between the first inner core (5) and the first plug (10), a second sealing ring (7) is installed between the first inner core (5) and the liquid inlet pipe (11), and a fourth sealing ring (16) is installed on the outside of the first inner core (5).

4. The quick clamping and sealing device for accumulator pressure testing according to claim 3, characterized in that: A mounting hole (17) is provided on the inner side of the first housing (13), and the first housing (13) is mounted on the pressure testing machine body (1) through the mounting hole (17), and the second housing (19) is mounted on the hydraulic structure of the pressure testing machine body (1) through a fixing plate.

5. The quick clamping and sealing device for accumulator pressure testing according to claim 4, characterized in that: A first air inlet (18) is provided on the outer side of the first shell (13), and the first air inlet (18) is located at the bottom end of the first piston block (14); a second air inlet (23) is provided on the outer side of the second shell (19), and the second air inlet (23) is located at the top end of the second piston block (20).

6. The quick clamping and sealing device for accumulator pressure testing according to claim 5, characterized in that: A sixth sealing ring (24) is evenly installed on the outer side of the second piston block (20), and the outer side of the sixth sealing ring (24) is in contact with the second outer shell (19). A seventh sealing ring (25) is installed between the second piston block (20) and the second inner core (21).

7. A method for using a quick clamping and sealing device for accumulator pressure testing according to any one of claim 6, characterized in that: The following steps are involved: Step 1: First, connect the high-pressure air pipe to the outside of the first air inlet (18) and the second air inlet (23), so that the first piston block (14) and the second piston block (20) are close to the first head (10) and the second head (22), thereby blocking the effect of the first accumulator radial sealing ring (9) and the second accumulator radial sealing ring (27), thereby protecting the first accumulator radial sealing ring (9) and the second accumulator radial sealing ring (27), and then install the accumulator housing (3) on the lower sealing structure (4) on the pressure testing machine body (1), and then drive the upper sealing structure (2) to move downward through the hydraulic structure of the pressure testing machine body (1), so that the upper sealing structure (2) is installed on the accumulator housing (3), so that The first push head (10) and the second push head (22) are engaged with the inner side of the accumulator housing (3), and the accumulator housing (3) squeezes the first piston block (14) and the second piston block (20), so that the first piston block (14) and the second piston block (20) are retracted inward, so that the first accumulator radial sealing ring (9) and the second accumulator radial sealing ring (27) are exposed. The arrangement of the first piston block sealing ring (15), the fourth sealing ring (16), the sixth sealing ring (24) and the seventh sealing ring (25) ensures the sealing effect when the first piston block (14) and the second piston block (20) slide. The arrangement of the fifth sealing ring (8) and the third sealing ring (26) preliminarily ensures the sealing performance of the connection between the accumulator housing (3) and the device. Step 2: High-pressure medium is injected through the liquid inlet pipe (11). The high-pressure medium squeezes the first accumulator radial sealing ring (9) and the second accumulator radial sealing ring (27) through the first through hole and the second through hole while performing a pressure test on the accumulator housing (3), thereby making the outer sides of the first accumulator radial sealing ring (9) and the second accumulator radial sealing ring (27) fit better at the opening of the accumulator housing (3), thereby effectively enhancing the sealing effect.

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