Sealing performance testing device for Teflon air pipe

Abstract

The invention discloses a teflon air pipe sealing performance testing device, and relates to the technical field of air pipe production and detection. Comprising sliding cylinders slidably arranged at two ends of a to-be-tested air duct, and a connecting seat and a rectifying head are sequentially arranged on one side of each sliding cylinder; a sealing diaphragm is loaded in the sliding cylinder, one end of the sealing diaphragm is fixed on the sliding cylinder, and the free end of the sealing diaphragm is reversely pulled after penetrating through the connecting seat and the rectifying head and is extruded and fixed at the end part of the air duct to be detected through a flange plate sleeved outside the sliding cylinder. According to the invention, the sliding cylinders arranged at the two ends of the to-be-detected air pipe in a sliding manner synchronously move bidirectionally and are matched with the sealing diaphragm capable of being stored and released, so that any section of the to-be-detected air pipe is quickly sealed, and efficient long-distance air pipe detection is realized; and a triple dynamic sealing mechanism is adopted, so that good sealing of a non-test section is realized. Airflow impact is carried out on the sealing diaphragm in traction through airflow and the rectification head, wrinkles generated in the storage or traction process of the sealing diaphragm are eliminated, and the sealing diaphragm can be better attached to the pipe wall in a sealed mode.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of duct production detection, in particular to a Teflon duct sealing test device. BACKGROUND

[0002] Teflon ducts are widely used in the fields of semiconductors and chemical industry due to their corrosion resistance and high cleanliness, and the sealing property of the Teflon ducts is directly related to the safety of gas delivery; The existing sealing test device needs to be disassembled and tested separately due to site or equipment reasons, and cannot perform continuous testing during dynamic advancement, and needs to be reconnected after testing, which is time-consuming and laborious. In such long-distance pipeline sealing detection, direct plugging at both ends for pressure testing cannot meet the sealing requirements, and it is difficult to determine the accurate position of the leakage point due to the large span. Therefore, the present application provides a Teflon duct sealing test device. SUMMARY

[0003] The present application provides a Teflon duct sealing test device.

[0004] The technical problem solved by the present application is: The existing technology generally adopts segmented detection for long-distance pipelines, which is low in efficiency; The dynamic sealing performance of the existing technology is poor; The present application can be implemented by the following technical scheme: a Teflon duct sealing test device, comprising a support frame and a to-be-tested duct arranged on the support frame, a sliding cylinder is arranged at the port of the to-be-tested duct, and a connecting seat and a rectifier head are coaxially fixed on the side of the sliding cylinder facing the to-be-tested duct; A sealing diaphragm is loaded in the sliding cylinder, one end of the sealing diaphragm is fixed to the end of the sliding cylinder away from the rectifier head, the free end of the sealing diaphragm is reversely pulled after passing through the connecting seat and the rectifier head, and is fixed to the end of the to-be-tested duct by a flange disc arranged outside the sliding cylinder; A push-pull shaft is fixedly arranged in the sliding cylinder, the push-pull shaft is provided with a hollow air channel, one end of the air channel is communicated with the air hole of the connecting seat and the interior of the to-be-tested duct through the one-way valve in the rectifier head, and the other end is externally connected with a colored smoke source.

[0005] Further technical improvements of the present application are as follows: a plurality of storage discs are uniformly fixed in the sliding cylinder in a coaxial manner, a gully is formed between adjacent storage discs, a plurality of extrusion strips driven radially by air cylinders are arranged coaxially outside the gully, the proximal ends of adjacent extrusion strips are provided with limiting ropes, one end of each limiting rope is fixed to one extrusion strip, and the other end is wound on a rotating wheel provided with a torsional spring, and the rotating wheel is installed in another extrusion strip.

[0006] The further technical improvement of the present application is that the extension and retraction actions of the cylinder groups of the plurality of extrusion strips located in the same vertical plane are kept synchronous control.

[0007] The further technical improvement of the present application is that the floating groove is radially arranged in the inner side of the flange plate, the floating block connected with the spring is slidably arranged in the floating groove, and the spring makes the floating block have a tendency to move to the outer edge.

[0008] The further technical improvement of the present application is that the rotating ring is coaxially slidably arranged in the connecting seat, the outer side wall of the rotating ring is provided with a plurality of involute grooves, the connecting rod is radially slidably arranged in each involute groove, and the other end of the connecting rod is fixed with the extrusion arc block; the gear ring is fixed in the rotating ring, and the gear ring is driven to rotate to drive the extrusion arc block to move radially.

[0009] The further technical improvement of the present application is that the ring seat is coaxially fixed outside the connecting seat, the air bag is fixed in the groove of the ring seat, and the air circuit connected with the air bag expands when the sealing diaphragm needs to be extruded.

[0010] The further technical improvement of the present application is that the annular air cavity is arranged in the rectifier head, the surface of the rectifier head is uniformly provided with the air outlet holes in the covered area of the sealing diaphragm, the air outlet holes are communicated with the annular air cavity, and the air circuit supplies air to the annular air cavity when the sealing diaphragm is pulled outward.

[0011] The further technical improvement of the present application is that the transition cylinder is detachably connected to the tail end of the to-be-tested air pipe, the outer contour of the transition cylinder is consistent with the sliding cylinder body, and the external air circuit passes through the transition cylinder and the sliding cylinder body to reach the application position.

[0012] Compared with the prior art, the present application has the following beneficial effects: 1. The sliding cylinder bodies arranged at both ends of the to-be-tested air pipe are bidirectionally synchronously moved, the sealing diaphragm is cooperatively stored and released, the rapid sealing of any section of the to-be-tested air pipe is realized, long-distance pipelines can also be tested in sections without disassembly, the time cost and labor cost are greatly reduced, the test efficiency is improved, and the accuracy of determining the position of the leakage is improved.

[0013] 2. The present application adopts a triple dynamic sealing mechanism, including floating block fine-tuning extrusion sealing, extrusion arc block radial rigid sealing and air bag inflation extrusion sealing; all of them act on the sealing diaphragm to make it tightly adhere to the inner wall of the to-be-tested air pipe, and good sealing of the non-test section is realized, and the test accuracy is improved.

[0014] 3、The utility model discloses a sealing diaphragm is impacted by airflow and rectifier head in traction, eliminates the wrinkle of sealing diaphragm in the process of storage or traction, makes it better and better with the pipe wall adhesion seal, and simultaneously adopts extrusion strip and storage dish cooperation to sealing diaphragm extrusion, thereby with its storage to the gap between two extrusion strips, to ensure that it can be orderly released and reused when using. BRIEF DESCRIPTION OF DRAWINGS

[0015] For the convenience of those skilled in the art, the present application is further described below with reference to the accompanying drawings.

[0016] Figure 1 It is the overall external structure schematic diagram of the utility model; Figure 2 It is the main body structure cross section schematic diagram of the utility model; Figure 3 It is the flange connection structure schematic diagram of the utility model; Figure 4 It is the utility model Figure 2 The partial close -up of A in the utility model; Figure 5 It is the sealing diaphragm storage release structure schematic diagram of the utility model; Figure 6 It is the utility model Figure 4 The partial close -up of B in the utility model; Figure 7 It is the extrusion arc block drive structure schematic diagram of the utility model; Figure 8 It is the rectifier head and sealing diaphragm connection state schematic diagram of the utility model.

[0017] In the drawing: 1, support frame;2, wind pipe to be measured;3, sliding cylinder;4, sealing diaphragm;5, connecting seat;6, rectifier head;7, push-pull shaft;8, storage dish;9, extrusion strip;10, limit rope;11, air cylinder;12, extrusion arc block;13, connecting rod;14, rotating ring;15, gear;16, gear;17, motor;18, ring seat;19, air bag;20, check valve;21, air guide pipe;22, transition cylinder;301, flange;302, floating block;3011, floating groove;501, air hole;601, let -go slot;602, annular air cavity;603, air outlet;701, air passage;1401, involute slot. DETAILED DESCRIPTION

[0018] In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined invention purpose, the specific embodiments, structures, features and effects according to the present application are described in detail as follows in combination with the drawings and preferred embodiments.

[0019] Please refer to Figures 1-8As shown, a Teflon air pipe sealing test device includes a support frame 1 and a to-be-tested air pipe 2 fixedly arranged thereon, a sliding cylinder 3 is slidably arranged at the port position of the two ends of the to-be-tested air pipe 2, and a connecting seat 5 and a rectifier head 6 are coaxially fixed in sequence at one end of the to-be-tested air pipe 2 towards the sliding cylinder 3; A sealing diaphragm 4 is arranged in the sliding cylinder 3, one end of the sealing diaphragm 4 is fixed to the inner side wall of the sliding cylinder 3, the free end of the sealing diaphragm 4 passes through the connecting seat 5 and the rectifier head 6 and is pulled back (towards the pipe opening direction of the sliding cylinder 3), and is extruded and fixed to the end of the to-be-tested air pipe 2 by a flange plate 301 arranged outside the sliding cylinder 3, so as to extrude and fix the free end of the sealing diaphragm 4; A push-pull shaft 7 is arranged in the sliding cylinder 3, the push-pull shaft 7 is provided with a hollow air channel 701, one end of the air channel 701 is connected to the air hole 501 on the connecting seat 5 and is connected to the inside of the to-be-tested air pipe 2 through the one-way valve 20 arranged in the rectifier head 6, the other end of the air channel 701 is connected to a smoke source, and the one-way valve 20 allows smoke to be injected from the air channel 701 to the to-be-tested air pipe 2.

[0020] More specifically, the distance between the two support seats of the support frame 1 is adjustable, and the height of a single support seat is adjustable; the inner side of the flange plate 301 is uniformly provided with floating blocks 302 coaxially, the flange plate 301 is provided with floating grooves 3011 corresponding to the floating blocks 302, the floating grooves 3011 extend radially, thereby restricting the sliding of the floating blocks 302 along the floating grooves 3011, and the floating blocks 302 have a tendency to move outward under the action of the spring.

[0021] Furthermore, a plurality of receiving discs 8 are coaxially fixed in the sliding cylinder 3 with uniform gaps, gullies are formed between adjacent receiving discs 8, a plurality of extrusion strips 9 are coaxially arranged outside the gaps between adjacent receiving discs 8, in this embodiment, the number of extrusion strips 9 is four, a limiting rope 10 is connected between the proximal ends of every two extrusion strips 9, one end of the limiting rope 10 is fixedly connected to one of the extrusion strips 9, the other end of the limiting rope 10 is fixedly connected to a rotating wheel arranged in the other extrusion strip 9, the limiting rope 10 is wound on the rotating wheel, and the rotating wheel is rotatably arranged in the extrusion strip 9 through a torsional spring; The sealing diaphragm 4 is arranged between the receiving disc 8 and the extrusion strip 9, a plurality of air cylinders 11 are fixed to the inner side wall of the sliding cylinder 3, the number of air cylinders 11 is the same as the number of extrusion strips 9, the output end of the air cylinder 11 is fixed to the outer side wall of the extrusion strip 9, and the plurality of air cylinders 11 of the extrusion strips 9 in the same vertical plane are synchronously controlled as a group; Further, a rotating ring 14 is coaxially and slidingly arranged in the connecting seat 5, a gear ring 15 is coaxially and fixedly attached to the inner side of the rotating ring 14, one side of the gear ring 15 is engaged and driven by a gear 16, the gear 16 is driven by a motor 17; a plurality of involutes 1401 are uniformly arranged on the outer side wall of the rotating ring 14, one end of a connecting rod 13 is slidingly arranged in the involutes 1401, the other end of the connecting rod 13 is fixedly connected with the extrusion arc block 12; the motor 17 drives the gear ring 15 to slowly rotate the rotating ring 14, the connecting rod 13 drives the extrusion arc block 12 to approach or move away from the to-be-measured air pipe 2 under the constraint of the involutes 1401; an annular seat 18 is coaxially and fixedly arranged on the outer side wall of the connecting seat 5, an air bag 19 is installed in the outer side groove of the annular seat 18, the air bag 19 is inflated to increase the volume and expand the outer edge to the inner side wall of the to-be-measured air pipe 2 and tightly contact; A displacement slot 601 is arranged on the rectifier head 6 for the sealing diaphragm 4 to pass through, the sealing diaphragm 4 is pulled out along the outer edge of the rectifier head 6 after being pulled out, a plurality of air outlet holes 603 are uniformly arranged in the area of the rectifier head 6 covered by the sealing diaphragm 4, the other ends of the air outlet holes 603 are all communicated with an annular air chamber 602 arranged in the rectifier head 6, a gas guide pipe 21 is embedded in the sliding cylinder 3, the gas guide pipe 21 is communicated with the annular air chamber 602 and supplies air to the air bag 19, and an air valve is arranged on the air supply branch to control the air supply.

[0022] Further, when the sliding cylinder 3 as a whole enters the to-be-measured air pipe 2, a transition cylinder 22 is fixed at the tail end of the to-be-measured air pipe 2, the outer contour of the transition cylinder 22 is consistent with that of the sliding cylinder 3, so that the sliding occurs through the flange plate 301, and the gas guide pipe 21 extends to the outside and is connected with the air source through the transition cylinder 22.

[0023] Further, a silica gel layer is arranged at the contact position of the floating block 302, the extrusion arc block 12 and the sealing diaphragm 4.

[0024] In use, the to-be-measured air pipe 2 is first installed according to the above-mentioned Figure 1 method, then the transition cylinder 22 is added to the sliding cylinder 3 at any end of the to-be-measured air pipe 2 and is pushed into the to-be-measured air pipe 2; during the pushing process, the air cylinder group drives the corresponding extrusion strips 9 to move away from each other, in the initial state, the sealing diaphragm 4 is compressed and stored in the gap of the storage disc 8, at this time, since the extrusion strips 9 do not play a limiting role, one end of the sealing diaphragm 4 is also pressed and fixed by the flange plate 301, so that during the movement of the rectifier head 6, the sealing diaphragm 4 in the gap is pulled out and moves backward through the displacement slot 601 and along the outer edge of the rectifier head 6, and during the movement, the gas flow in the gas guide pipe 21 is output to the annular air chamber 602 and is blown out from the air outlet hole 603, the blown-out gas flow forms an air layer on the membrane wall of the sealing diaphragm 4, so that the wrinkles are relaxed and tend to be smooth; When the distance between the two rectifier heads 6 reaches the set value, the pushing is stopped, the air supply of the annular air cavity 602 is cut off, and the air bag 19 is supplied to expand to a certain extent and be maintained; then the motor 17 is started to drive the rotating ring 14 to rotate slowly through the gear transmission until the connecting rod 13 extends outward under the action of the involute slot 1401 until the extrusion arc block 12 is in close contact with the wind pipe 2 to be tested; the air bag 19 on the other end connecting seat 5 and the extrusion arc block 12 also perform the same operation, so that a relatively closed sealed space is formed between the two rectifier heads 6.

[0025] Then the colored smoke gas is released from the air channel 701 of any one push-pull shaft 7 to the space between the two rectifier heads 6, and a certain pressure is maintained, and whether the smoke gas escapes from the section of the wind pipe 2 to be tested is observed within a certain time, so that the sealing property of the section of the wind pipe can be judged.

[0026] After a certain time, the extrusion slide block 12 and the air bag 19 return to the initial position, the extrusion on the sealing diaphragm 4 is released, then the two slide cylinder bodies 3 are moved synchronously, and the distance between them remains unchanged. During the movement, the sealing diaphragm 4 in one slide cylinder body 3 is pulled out, and the required length of the sealing diaphragm 4 at the other slide cylinder body 3 becomes shorter, so that it needs to be stored. After the movement is completed, the first air cylinder group away from the rectifier head 6 drives the corresponding extrusion strip 9 to approach each other into the gap, drives the corresponding part of the sealing diaphragm into the gap, so that the sealing diaphragm 4 outside the slide cylinder body 3 is pulled back into the slide cylinder body 3. According to the length of the sealing diaphragm 4 that needs to be recovered, the adjacent air cylinder group matching the movement distance of the slide cylinder body 3 is started in turn; it should be noted that only the air outlet hole 603 blows air outward during the process of the sealing diaphragm 4 being pulled outward.

[0027] After the movement is completed, the extrusion arc block 12 and the air bag 19 abut against the inner wall of the wind pipe 2 to be tested, then the colored smoke gas is released through the air channel 701 and a certain pressure and time are maintained; The above steps are repeated until the sealing property test of the whole section of the wind pipe 2 to be tested is completed.

[0028] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with a preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes, without departing from the technical solution of the present application. Any simple modification, equivalent change and modification of the above embodiments based on the technical essence of the present application are still within the scope of the technical solution of the present application.

Claims

1. A Teflon duct sealing test device, comprising a support frame (1) and a duct to be tested mounted thereon, characterized in that, The two ends of the air duct (2) to be tested are slidably provided with sliding cylinders (3), and the sliding cylinders (3) are coaxially fixed with connecting seats (5) and rectifier heads (6) on the side facing the air duct (2) to be tested. The sliding cylinder (3) is filled with a sealing diaphragm (4). One end of the sealing diaphragm (4) is fixed to the end of the sliding cylinder (3) away from the rectifier head (6). Its free end passes through the connecting seat (5) and the rectifier head (6) and is pulled in the opposite direction. It is then squeezed and fixed to the end of the air duct (2) to be tested by the flange (301) sleeved on the outside of the sliding cylinder (3). A push-pull shaft (7) is fixed inside the sliding cylinder (3). The push-pull shaft (7) is provided with a hollow air passage (701). One end of the air passage (701) is connected to the air hole (501) of the connecting seat (5) and is connected to the inside of the air pipe (2) to be tested through the one-way valve (20) in the rectifier head (6). The other end is connected to a colored smoke source.

2. The Teflon duct sealing test device according to claim 1, characterized in that, Multiple storage discs (8) are coaxially and uniformly fixed inside the sliding cylinder (3). Grooves are formed between adjacent storage discs (8). Multiple extrusion strips (9) driven radially by cylinders (11) are coaxially arranged outside the grooves. Limiting ropes (10) are provided near the proximal ends of adjacent extrusion strips (9). One end of the limiting rope (10) is fixed to one extrusion strip (9), and the other end is wound on a rotating wheel with a torsion spring. The rotating wheel is installed inside another extrusion strip (9).

3. The Teflon duct sealing test device according to claim 2, characterized in that, The extension and retraction actions of the cylinder assembly of multiple extrusion bars (9) located in the same vertical plane are kept synchronized.

4. The Teflon duct sealing test device according to claim 1, characterized in that, The flange (301) has a radially open floating groove (3011) on its inner side. A floating block (302) connected to a spring is slidably disposed in the floating groove (3011). The spring causes the floating block (302) to have a tendency to move towards the outer edge.

5. The Teflon duct sealing test device according to claim 1, characterized in that, A rotating ring (14) is coaxially slidably arranged inside the connecting seat (5). The outer wall of the rotating ring (14) is provided with multiple involute grooves (1401). A connecting rod (13) is slidably arranged radially inside each involute groove (1401). An extrusion arc block (12) is fixed at the other end of the connecting rod (13). A gear ring (15) is fixed inside the rotating ring (14), and the gear ring (15) is driven to rotate by the gear, thereby driving the extrusion arc block (12) to move radially.

6. The Teflon duct sealing test device according to claim 5, characterized in that, The connecting seat (5) is also coaxially fixed with a ring seat (18), and an airbag (19) is fixed in the groove of the ring seat (18). The airbag (19) is connected to an external air passage and expands when the sealing diaphragm (4) needs to be squeezed.

7. The Teflon duct sealing test device according to claim 1, characterized in that, The rectifier head (6) is provided with an annular air chamber (602), and the surface of the rectifier head (6) is uniformly provided with air outlets (603) in the area covered by the sealing diaphragm (4). The air outlets (603) are connected to the annular air chamber (602). When the sealing diaphragm (4) is pulled outward, the air passage supplies air into the annular air chamber (602).

8. The Teflon duct sealing test device according to claim 1, characterized in that, The tail end of the air duct (2) to be tested is detachably connected to the transition cylinder (22). The outer contour of the transition cylinder (22) is consistent with that of the sliding cylinder (3). The external air passage passes through the transition cylinder (22) and the sliding cylinder (3) to deliver the air to the application position.

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