A bellows continuous tightness test tool and circulating water injection method

Abstract

The present invention relates to the field of tightness detection of bellows, and in particular to a continuous tightness test tool for bellows and a circulating water injection method. Technical problem: When the tightness of existing bellows is tested, the continuous tightness test of bellows is mostly achieved by ventilating the inside and detecting the internal vacuum degree, and this method is often difficult to identify the leak of the bellows. Technical solution: A continuous tightness test tool for bellows, including a bracket assembly, a reflux assembly and a bellows body. The present invention replaces the original inflation detection by setting a special continuous water injection detection method to achieve continuous detection of the bellows, thereby solving the problem to a certain extent that when the tightness of existing bellows is tested, the continuous tightness test of the bellows is mostly achieved by ventilating the inside and detecting the internal vacuum degree, and this method is often difficult to identify the leak of the bellows.

Description

Technical Field

[0001] The invention relates to the field of tightness detection of bellows, and in particular to a continuous tightness test tool for bellows and a circulating water injection method. Background Art

[0002] Bellows refers to a tubular elastic sensitive element connected by foldable corrugated sheets along the folding and stretching direction. Bellows are widely used in instruments and meters. Their main purpose is to be used as measuring elements of pressure measuring instruments to convert pressure into displacement or force. The bellows has a thinner wall and higher sensitivity, with a measuring range of tens of Pa to tens of MPa. Its open end is fixed, the sealed end is in a free state, and an auxiliary spiral spring or reed is used to increase elasticity. When working, it stretches along the length of the tube under the action of internal pressure, causing the movable end to produce a displacement that is related to the pressure. The movable end drives the pointer to directly indicate the size of the pressure. Bellows are often combined with displacement sensors to form pressure sensors with output as electrical quantity, and are sometimes used as isolation elements. Since the extension of the bellows requires a large volume change, its response speed is lower than that of the Bourdon tube. Bellows are suitable for measuring low pressure, and the existing bellows, when conducting tightness tests, often achieve continuous tightness tests on the bellows by ventilating the inside and testing the internal vacuum when both ends are sealed. Although this method can detect the tightness of the bellows, it is often difficult to detect the corresponding leaks on the bellows. At the same time, because it is an integral test, it is also necessary to make a corresponding fixed sealing fixture according to the length of the bellows during the test, which can easily lead to an increase in the cost of the entire bellows tightness test, thereby affecting the ease of use of the entire bellows tightness test. Summary of the invention

[0003] In order to overcome the problem that the tightness of the existing bellows is often tested by ventilating the inside and testing the internal vacuum to achieve continuous tightness testing of the bellows, but this method often makes it difficult to identify the leaking part of the bellows.

[0004] The technical solution of the present invention is: a bellows continuous tightness test fixture, including a bracket assembly, a reflux assembly, a dosing assembly, a detection assembly, an adjustment assembly, a drive assembly, a sealing assembly and a bellows body; a reflux assembly is installed on one side of the bracket assembly; a bellows body is arranged at the upper end of the bracket assembly; a detection assembly is arranged on the outside of the bellows body; a dosing assembly is arranged at the rear end of the detection assembly; an adjustment assembly is arranged at the lower end of the dosing assembly; a drive assembly is installed on the inner side of the adjustment assembly; and sealing assemblies are arranged on both sides of the bellows body.

[0005] Preferably, the water body can be circulated and refluxed by the cooperation between the bracket assembly and the reflux assembly, and the dye can also be delivered into the water body through the dosing assembly. The tightness test of the bellows can be achieved by the cooperation between the detection assembly and the sealing assembly, and the position adjustment of the detection assembly can be achieved by the cooperation between the adjustment assembly and the driving assembly.

[0006] Preferably, the bracket assembly includes a fixed bracket, an adjustment groove, an adjustment frame, a fixed strip, a mounting frame and a guide plate; an adjustment groove is provided on the outer side of the fixed bracket; an adjustment frame is provided on the inner side of the adjustment groove; a fixed strip is installed on one side of the fixed bracket; a mounting frame is installed at the front end of the fixed bracket; and a guide plate is fixedly connected to the inner side of the fixed bracket.

[0007] Preferably, the reflux assembly includes a guide groove, a collecting box, a lifting pipe, a lifting pump and a return pipe; a plurality of guide grooves are opened on the guide plate; a collecting box is arranged on one side of the guide groove; a lifting pipe is installed on the collecting box; a lifting pump is installed on the upper end of the lifting pipe; and a return pipe is installed on the lifting pump.

[0008] Preferably, the dosing assembly includes a connector, a liquid inlet pipe, a doser, a one-way valve and a fixed bracket; the connector is installed on the reflux pipe; the rear end of the connector is provided with a liquid inlet pipe; the doser is installed on the liquid inlet pipe; the rear end of the doser is provided with a one-way valve; and the rear end of the one-way valve is provided with a fixed bracket.

[0009] Preferably, the detection assembly includes a sealing ring, a sealing head and a sealing rubber ring; a sealing ring is fixedly connected to the lower end of the connecting head; two sealing rings are provided; a sealing head is provided on both sides of the sealing ring; and a sealing rubber ring is fixedly connected to the sealing head.

[0010] Preferably, the adjustment assembly includes a connecting bracket, a combination bar, a screw slider and a screw rail; the screw rail is installed at the front end of the mounting frame; the screw slider is arranged on the inner side of the screw rail; the combination bar is installed at the upper end of the screw slider; and the connecting bracket is installed on the combination bar.

[0011] Preferably, the driving assembly includes a positioning bar, a first sliding block, a second sliding block, an engaging rack, a rotating wheel, a driving motor and a mounting plate; two positioning bars are fixedly connected to the inner side of the connecting bracket; and the first sliding block is slidably connected to the upper end positioning bar.

[0012] Preferably, a second sliding block is arranged on one side of the first sliding block; meshing racks are fixedly connected to the second sliding block and the first sliding block; a rotating wheel is arranged between the two meshing racks; the rear end of the rotating wheel is connected to a driving motor through a rotating shaft; a mounting plate is fixedly connected to one side of the first sliding block and the second sliding block.

[0013] Preferably, the sealing assembly includes a sealing airbag, an air inlet head, a waterproof ring and a water absorption rod; a sealing airbag is provided at both ends of the bellows body; an air inlet head is provided on the sealing airbag; a waterproof ring is installed on one side of the sealing airbag; and a water absorption rod is provided on the inner side of the sealing airbag.

[0014] A circulating water injection method for a bellows continuous tightness test tool comprises the following steps:

[0015] S1. First, water is fed into the interior of the bellows through the liquid inlet pipe. During the process of water entering, dye is fed into the interior of the liquid inlet pipe through the doser and mixed with the water. The water that enters the sealing ring will remain in the space enclosed by the sealing ring and the sealing head. When there is a leak in the main body of the bellows, the water will enter the interior of the bellows and leave a mark on the water absorption rod.

[0016] S2, then the driving motor drives the rotating wheel to rotate, so that the meshing rack drives the first sliding block and the second sliding block to move on the positioning bar, so that the sealing head can be separated from the sealing ring, so that the water can flow out from the gap between the sealing head and the sealing ring, and fall on the guide plate under the action of gravity;

[0017] S3. Then, the water is sent into the collecting box through the guide groove through the slope surface of the guide plate, and under the action of the lifting pump, the water can re-enter the connecting head through the lifting pipe and the return pipe, so that the water enters the sealing ring to realize the circulating water injection of the sealing ring.

[0018] Beneficial effects of the present invention:

[0019] 1. By setting up a special continuous water injection detection method to replace the original inflation detection, the continuous detection of the bellows can be realized, which can solve the problem that the existing bellows tightness detection is mostly carried out by ventilating the inside and detecting the internal vacuum degree, and this method is often difficult to identify the leakage of the bellows;

[0020] 2. The dyed water is sent between the sealing ring and the sealing head so that the dyed water can fall on the water absorption rod through the leak on the bellows, and the entire adjustment component is moved by the cooperation between the screw slider and the screw rail, so that the detection component can be moved on the bellows, so that the user can pull out the water absorption rod to realize the positioning detection of the leak on the bellows, thereby greatly improving the convenience of the entire detection tooling;

[0021] 3. The position of the adjusting frame inside the adjusting groove is adjusted by adjusting the bolts on the adjusting frame, so that the adjusting frame can be adjusted according to the length of the bellows, so that the entire tightness test tooling can be adapted to the use of bellows of different specifications, thereby improving the applicability of the entire tightness test tooling, and thus greatly improving the comfort of the entire tightness test tooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Shown is a schematic diagram of the first three-dimensional structure of the bellows continuous tightness test tool of the present invention;

[0023] Figure 2 Shown is a second three-dimensional structure schematic diagram of the bellows continuous tightness test tool of the present invention;

[0024] Figure 3 Shown is a schematic diagram of the three-dimensional structure of the reflux assembly of the bellows continuous tightness test fixture of the present invention;

[0025] Figure 4 Shown is a schematic diagram of the three-dimensional structure of the bellows continuous tightness test fixture detection assembly of the present invention;

[0026] Figure 5 Shown is a schematic diagram of the three-dimensional structure of the driving assembly of the bellows continuous tightness test fixture of the present invention;

[0027] Figure 6 Shown is a schematic diagram of the three-dimensional structure of the sealing assembly of the bellows continuous tightness test fixture of the present invention.

[0028] Description of reference numerals: 1, bracket assembly; 2, reflux assembly; 3, dosing assembly; 4, detection assembly; 5, adjustment assembly; 6, drive assembly; 7, sealing assembly; 8, bellows body; 101, fixed bracket; 102, adjustment groove; 103, adjustment frame; 104, fixing bar; 105, mounting frame; 106, guide plate; 201, guide groove; 202, collecting box; 203, lifting pipe; 204, lifting pump; 205, reflux pipe; 301, connector; 302, liquid inlet pipe; 303, dosing medicine container; 304, one-way valve; 305, fixed bracket; 401, sealing ring; 402, sealing head; 403, sealing rubber ring; 501, connecting bracket; 502, assembly strip; 503, screw slider; 504, screw slide rail; 601, positioning strip; 602, first sliding block; 603, second sliding block; 604, meshing rack; 605, rotating wheel; 606, driving motor; 607, mounting plate; 701, sealing airbag; 702, air inlet head; 703, waterproof ring; 704, water absorption rod. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0030] See also Figure 1-2 The present invention provides an embodiment: a bellows continuous tightness test fixture, comprising a bracket assembly 1, a reflux assembly 2, a dosing assembly 3, a detection assembly 4, an adjustment assembly 5, a drive assembly 6, a sealing assembly 7 and a bellows body 8; a reflux assembly 2 is installed on one side of the bracket assembly 1; a bellows body 8 is arranged at the upper end of the bracket assembly 1; a detection assembly 4 is arranged on the outer side of the bellows body 8; a dosing assembly 3 is arranged at the rear end of the detection assembly 4; an adjustment assembly 5 is arranged at the lower end of the dosing assembly 3; a drive assembly 6 is installed on the inner side of the adjustment assembly 5; sealing assemblies 7 are arranged on both sides of the bellows body 8, and the bracket assembly 1 comprises a fixed bracket 101, an adjustment slot 102, an adjustment frame 103, a fixed The fixing bracket 101 has a strip 104, a mounting frame 105 and a guide plate 106; an adjusting groove 102 is provided on the outer side of the fixing bracket 101; an adjusting frame 103 is provided on the inner side of the adjusting groove 102; a fixing strip 104 is installed on one side of the fixing bracket 101; a mounting frame 105 is installed on the front end of the fixing bracket 101; a guide plate 106 is fixedly connected to the inner side of the fixing bracket 101, and the adjusting assembly 5 includes a connecting bracket 501, a combination strip 502, a screw slider 503 and a screw guide rail 504; a screw guide rail 504 is installed on the front end of the mounting frame 105; a screw slider 503 is provided on the inner side of the screw guide rail 504; a combination strip 502 is installed on the upper end of the screw slider 503; a connecting bracket 501 is installed on the combination strip 502.

[0031] See also Figure 3-4 In this embodiment, the reflux component 2 includes a guide groove 201, a header box 202, a lifting pipe 203, a lifting pump 204 and a reflux pipe 205; a plurality of guide grooves 201 are provided on the guide plate 106; a header box 202 is provided on one side of the guide groove 201; a lifting pipe 203 is installed on the header box 202; a lifting pump 204 is installed on the upper end of the lifting pipe 203; a reflux pipe 205 is installed on the lifting pump 204, and the dosing component 3 includes a connector 301, a liquid inlet pipe 302, a doser 303, a one-way valve 304 and a fixing bracket 305; the reflux pipe 205 05 is installed with a connector 301; a liquid inlet pipe 302 is arranged at the rear end of the connector 301; a doser 303 is installed on the liquid inlet pipe 302; a one-way valve 304 is arranged at the rear end of the doser 303; a fixed bracket 305 is arranged at the rear end of the one-way valve 304, and the detection component 4 includes a sealing ring 401, a sealing head 402 and a sealing rubber ring 403; a sealing ring 401 is fixedly connected to the lower end of the connector 301; two sealing rings 401 are arranged; a sealing head 402 is arranged on both sides of the sealing ring 401; a sealing rubber ring 403 is fixedly connected to the sealing head 402.

[0032] See also Figure 5-6In this embodiment, the driving assembly 6 includes a positioning bar 601, a first sliding block 602, a second sliding block 603, a meshing rack 604, a rotating wheel 605, a driving motor 606 and a mounting plate 607; two positioning bars 601 are fixedly connected to the inner side of the connecting bracket 501; the first sliding block 602 is slidably connected to the positioning bar 601 at the upper end, and a second sliding block 603 is provided on one side of the first sliding block 602; the second sliding block 603 and the first sliding block 602 are both fixedly connected to the meshing rack 604; a meshing rack 604 is provided between the two meshing racks 604. A rotating wheel 605 is provided; the rear end of the rotating wheel 605 is connected to a driving motor 606 via a rotating shaft; a mounting plate 607 is fixedly connected to one side of the first sliding block 602 and the second sliding block 603, and the sealing assembly 7 includes a sealing airbag 701, an air inlet head 702, a waterproof ring 703 and a water absorption rod 704; a sealing airbag 701 is provided at both ends of the bellows body 8; an air inlet head 702 is provided on the sealing airbag 701; a waterproof ring 703 is installed on one side of the sealing airbag 701; and a water absorption rod 704 is provided on the inner side of the sealing airbag 701.

[0033] According to another aspect of the present invention, a circulating water injection method for a bellows continuous tightness test tool is provided, comprising the following steps:

[0034] S1. First, water is fed into the interior of the bellows through the liquid inlet pipe 302. During the process of water entering, dye is fed into the interior of the liquid inlet pipe 302 through the doser 303 and mixed with the water. The water that enters the sealing ring 401 will remain in the space enclosed by the sealing ring 401 and the sealing head 402. When there is a leakage in the bellows body 8, the water will enter the interior of the bellows and leave a mark on the water absorption rod 704.

[0035] S2, then the driving motor 606 drives the rotating wheel 605 to rotate, so that the meshing rack 604 drives the first sliding block 602 and the second sliding block 603 to move on the positioning bar 601, so that the sealing head 402 can be separated from the sealing ring 401, so that the water can flow out from the gap between the sealing head 402 and the sealing ring 401, and fall on the guide plate 106 under the action of gravity;

[0036] S3. Then, the water is sent into the collecting box 202 through the guide groove 201 through the slope surface of the guide plate 106, and under the action of the lifting pump 204, the water can re-enter the connecting head 301 through the lifting pipe 203 and the return pipe 205, so that the water enters the sealing ring 401 to realize the circulating water injection of the sealing ring 401.

[0037] When working, water is first sent into the interior of the bellows through the liquid inlet pipe 302, and in the process of water entering, dye is sent into the interior of the liquid inlet pipe 302 through the dosing device 303 and mixed with the water, and the water entering the sealing ring 401 will remain in the space enclosed by the sealing ring 401 and the sealing head 402. When there is a leakage in the bellows body 8, the water will enter the interior of the bellows and leave a mark on the water absorption rod 704. Then, the driving motor 606 drives the rotating wheel 605 to rotate, so that the meshing rack 604 drives the first sliding block 602 and the second sliding block 603 to move on the positioning bar 601, so that the sealing head 402 can be separated from the sealing ring 401, so that the water can flow out from the gap between the sealing head 402 and the sealing ring 401, and fall on the guide plate 106 under the action of gravity;

[0038] Then, the water is sent into the collecting box 202 through the guide groove 201 through the slope surface of the guide plate 106, and under the action of the lifting pump 204, the water can re-enter the connecting head 301 through the lifting pipe 203 and the return pipe 205, so that the water enters the sealing ring 401 to achieve circulating water injection to the sealing ring 401. During the circulation of the water, the detection component 4 can be moved on the bellows body 8 through the cooperation of the screw slider 503 and the screw rail 504 to achieve continuous tightness detection of the bellows body 8.

[0039] Through the above steps, a special continuous water injection detection method is set to replace the original inflation detection to realize continuous detection of the bellows, so as to solve the problem that the tightness of the existing bellows is mostly detected by ventilating the inside and detecting the internal vacuum degree during the tightness detection of the bellows, and this method is often difficult to identify the leakage of the bellows. At the same time, the bracket component 1 and the reflux component 2 can cooperate with each other to circulate the water back, and the dosing component 3 can also be used to send the dye into the water body. The detection component 4 and the sealing component 7 cooperate with each other to realize the tightness detection of the bellows, and the adjustment component 5 and the drive component 6 cooperate with each other to realize the position adjustment of the detection component 4.

[0040] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the spirit of the present invention.

Claims

1. A bellows continuous tightness test fixture, comprising a bracket assembly (1); characterized in that: The invention also comprises a reflux component (2), a dosing component (3), a detection component (4), an adjustment component (5), a drive component (6), a sealing component (7) and a bellows body (8); the reflux component (2) is installed on one side of the support component (1); the bellows body (8) is arranged at the upper end of the support component (1); the detection component (4) is arranged on the outer side of the bellows body (8); the dosing component (3) is arranged at the rear end of the detection component (4); the adjustment component (5) is arranged at the lower end of the dosing component (3); the adjustment component (6) is arranged at the lower end of the bellows body (8 ... upper end of the bellows body (8); the adjustment component (6) is arranged at the lower end of the bellows body (8); the adjustment component (6) is arranged at the lower end of the bellows body (8); the adjustment component (6) is arranged at the rear end of the bellows body (8); the adjustment component (6) is arranged at the lower end of the bellows body (8); the adjustment component (6) is arranged at the upper end of the bellows body (8); the adjustment component (6) is arranged at the lower end of the bellows body (8); the adjustment component (6) is arranged at the lower end of the bellows body (8); the adjustment component (6) is arranged at the upper end of the bellows body (8); the adjustment component (6) is arranged at the outer side of the bellows body A driving assembly (6) is installed on the inner side of the component (5); sealing assemblies (7) are arranged on both sides of the bellows body (8); the return assembly (2) comprises a guide groove (201), a collecting box (202), a lifting pipe (203), a lifting pump (204) and a return pipe (205); a plurality of guide grooves (201) are provided on the guide plate (106); a collecting box (202) is arranged on one side of the guide groove (201); a lifting pipe (203) is installed on the collecting box (202); and the upper end of the lifting pipe (203) is provided with a plurality of guide grooves (201). A lifting pump (204) is installed at the end; a return pipe (205) is installed on the lifting pump (204); the dosing assembly (3) comprises a connector (301), a liquid inlet pipe (302), a doser (303), a one-way valve (304) and a fixing bracket (305); a connecting head (301) is installed on the return pipe (205); a liquid inlet pipe (302) is provided at the rear end of the connecting head (301); a doser (303) is installed on the liquid inlet pipe (302); a one-way valve (304) is provided at the rear end of the doser (303); 304); a fixing bracket (305) is provided at the rear end of the one-way valve (304); the sealing assembly (7) comprises a sealing airbag (701), an air inlet head (702), a waterproof ring (703) and a water absorption rod (704); a sealing airbag (701) is provided at both ends of the bellows body (8); an air inlet head (702) is provided on the sealing airbag (701); a waterproof ring (703) is installed on one side of the sealing airbag (701); and a water absorption rod (704) is provided on the inner side of the sealing airbag (701).

2. A bellows continuous tightness test tool according to claim 1, characterized in that: The bracket assembly (1) comprises a fixed bracket (101), an adjustment groove (102), an adjustment frame (103), a fixing strip (104), a mounting frame (105) and a guide plate (106); the fixing bracket (101) is provided with an adjustment groove (102) on the outside; the adjustment frame (103) is provided on the inside of the adjustment groove (102); the fixing strip (104) is installed on one side of the fixed bracket (101); the mounting frame (105) is installed on the front end of the fixed bracket (101); and the guide plate (106) is fixedly connected to the inside of the fixed bracket (101).

3. The continuous tightness test tool for a bellows according to claim 1, characterized in that: The detection component (4) comprises a sealing ring (401), a sealing head (402) and a sealing rubber ring (403); the sealing ring (401) is fixedly connected to the lower end of the connecting head (301); two sealing rings (401) are provided; a sealing head (402) is provided on both sides of the sealing ring (401); and the sealing rubber ring (403) is fixedly connected to the sealing head (402).

4. A bellows continuous tightness test tool as claimed in claim 2, characterized in that: The adjustment assembly (5) comprises a connecting bracket (501), a combination bar (502), a screw slider (503) and a screw guide rail (504); the front end of the mounting bracket (105) is mounted with the screw guide rail (504); the inner side of the screw guide rail (504) is provided with the screw slider (503); the upper end of the screw slider (503) is mounted with the combination bar (502); and the connecting bracket (501) is mounted on the combination bar (502).

5. A bellows continuous tightness test tool as claimed in claim 4, characterized in that: The driving assembly (6) comprises a positioning bar (601), a first sliding block (602), a second sliding block (603), a meshing rack (604), a rotating wheel (605), a driving motor (606) and a mounting plate (607); two positioning bars (601) are fixedly connected to the inner side of the connecting bracket (501); and the first sliding block (602) is slidably connected to the upper end positioning bar (601).

6. A bellows continuous tightness test tool as claimed in claim 5, characterized in that: A second sliding block (603) is arranged on one side of the first sliding block (602); meshing racks (604) are fixedly connected to the second sliding block (603) and the first sliding block (602); a rotating wheel (605) is arranged between the two meshing racks (604); a rear end of the rotating wheel (605) is connected to a driving motor (606) via a rotating shaft; and a mounting plate (607) is fixedly connected to one side of the first sliding block (602) and the second sliding block (603).

7. A circulating water injection method for a continuous tightness test tool for a bellows, comprising a continuous tightness test tool for a bellows according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. First, water is fed into the interior of the bellows through the liquid inlet pipe (302). During the process of the water entering the bellows, dye is fed into the interior of the liquid inlet pipe (302) through the doser (303) and mixed with the water. The water that enters the interior of the sealing ring (401) will remain in the space enclosed by the sealing ring (401) and the sealing head (402). When the bellows main body (8) leaks, the water will enter the interior of the bellows and leave a mark on the water absorption rod (704). S2, then driving the rotating wheel (605) to rotate through the driving motor (606), so that the meshing rack (604) drives the first sliding block (602) and the second sliding block (603) to move on the positioning bar (601), so that the sealing head (402) can be separated from the sealing ring (401), so that the water can flow out from the gap between the sealing head (402) and the sealing ring (401) and fall on the guide plate (106) under the action of gravity; S3. Then, the water is sent into the collecting box (202) through the guide groove (201) via the slope surface of the guide plate (106). Under the action of the lifting pump (204), the water can re-enter the connector (301) through the lifting pipe (203) and the return pipe (205), so that the water enters the sealing ring (401), thereby realizing the circulation of water injection to the sealing ring (401).

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