Air tightness detection device for exhaust corrugated pipe production

Abstract

The utility model relates to an air tightness detection device for exhaust bellows production, which comprises a working table and a detection assembly arranged on the working table, the detection assembly comprises two inflation pipes, two sleeves and two fixing rings, the two inflation pipes are respectively arranged at the end part of the working table and are symmetrically arranged, and the two sleeves are respectively arranged at the end part of the working table. The two sleeves are installed outside the inflating pipe in a sleeving mode, rubber blocks are installed between the inner walls of the sleeves and the outer wall of the inflating pipe in a clamped mode, threads are formed in the outer walls, facing the end of the workbench, of the sleeves, and threads are formed in the inner walls of the fixing rings and are in threaded connection with the outer walls of the sleeves. A notch is formed in the outer wall of the end, away from the end of the workbench, of the fixing ring, and a supporting block is fixedly installed on the table top of the workbench. The change of the expansion degree of the corrugated pipe is accurately sensed through the push rod and the sensor instead of naked eye observation, and the accuracy is improved.

Description

Technical Field

[0001] This utility model relates to the field of corrugated pipe technology, and in particular to an airtightness testing device for the production of exhaust corrugated pipes. Background Technology

[0002] Corrugated pipes are mainly used to compensate for pipeline thermal deformation, dampen vibrations, and absorb pipeline settlement deformation. Because the corrugated pipe material is relatively soft, to ensure long-term use, the sealing performance and outer wall strength of the corrugated pipe need to be tested. Operators will vent air into the corrugated pipe and observe its expansion. If the corrugated pipe is ruptured, air leakage will occur, and the expanded corrugated pipe volume will gradually shrink.

[0003] If the rupture in the bellows is small and the air leakage is not obvious, or if the bellows itself is not strong enough and gaps appear on the outer wall during inflation, it will be difficult for the operator to observe the changes in the degree of expansion of the bellows with the naked eye. Utility Model Content

[0004] The purpose of this application is to provide an airtightness testing device for the production of exhaust bellows, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] An airtightness testing device for producing exhaust bellows includes a workbench and a testing assembly mounted on the workbench. The testing assembly includes two air pumps, two sleeves, and two retaining rings. The two air pumps are respectively installed at the ends of the workbench and are symmetrically arranged. Both sleeves are fitted over the air pumps. A rubber block is clamped between the inner wall of the sleeve and the outer wall of the air pump. The outer wall of the sleeve facing the end of the workbench is threaded. A portion of the inner wall of the retaining ring is threaded and threaded to a portion of the outer wall of the sleeve. A groove is formed on the outer wall of the retaining ring away from the end of the workbench. A support block is fixedly mounted on the workbench surface. A groove is formed on the top surface of the support block. The retaining ring is installed above the end of the support block. A rubber sheet is clamped between the outer wall of the retaining ring and the groove of the support block.

[0007] Preferably, two outer plates are installed between the two air pipes, symmetrically arranged. An inner plate is installed inside each outer plate, mounted above the support block. Both the inner and outer plates are U-shaped, with their ends fixed to the workbench surface. The outer wall of the inner plate has multiple circular holes, each containing a push rod. A portion of the push rod extends out of the holes towards the outer plate. A baffle is fixedly installed on the outer wall of the push rod, facing the outer plate. Multiple sensors are embedded on the outer wall of the outer plate, their positions and number corresponding to the push rod. A spring is installed between the baffle on the outer wall of the push rod and the inner wall of the outer plate. One end of the spring is fixedly connected to the baffle on the push rod, and the other end is fixedly connected to the inner wall of the outer plate.

[0008] The beneficial effects of this utility model are: by setting up a detection component, the change in the degree of expansion of the bellows can be accurately sensed by the push rod and sensor, replacing visual observation and improving accuracy. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0010] Figure 2 This is a partially enlarged cross-sectional view of region A in this utility model;

[0011] Figure 3 This is a partially enlarged cross-sectional view of region B in this utility model.

[0012] In the diagram: 1. Workbench; 2. Support block; 3. Air pump pipe; 4. Inner plate; 5. Outer plate; 6. Push rod; 7. Spring; 8. Sensor; 9. Fixing ring; 10. Sleeve. Detailed Implementation

[0013] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings, so that the advantages and features of this utility model can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of this utility model. The directional terms mentioned in this utility model, such as "up," "down," "front," "back," "left," "right," "top," and "bottom," are only for reference to the accompanying drawings. Therefore, the directional terms used are for the purpose of explaining and understanding this utility model, and not for limiting this utility model.

[0014] like Figure 1-3The device shown is an airtightness testing device for the production of exhaust bellows. It includes a workbench 1 and a testing assembly mounted on the workbench 1. The testing assembly includes two air pumps 3, two sleeves 10, and two retaining rings 9. The two air pumps 3 are respectively installed at the ends of the workbench 1 and are symmetrically arranged. Both sleeves 10 are fitted over the outside of the air pumps 3. A rubber block is clamped between the inner wall of the sleeve 10 and the outer wall of the air pump 3. The outer wall of the sleeve 10 facing the end of the workbench 1 is threaded. A portion of the inner wall of the retaining ring 9 is threaded and threaded to a portion of the outer wall of the sleeve 10. A groove is formed on the outer wall of the retaining ring 9 at the end away from the end of the workbench 1. A support block 2 is fixedly mounted on the workbench 1. A groove is formed on the top surface of the support block 2. The retaining ring 9 is installed above the end of the support block 2, and a rubber sheet is clamped between the outer wall of the retaining ring 9 and the groove of the support block 2.

[0015] Two outer plates 5 are installed between the two air pump pipes 3, symmetrically arranged. An inner plate 4 is installed inside each outer plate 5, mounted above the support block 2. Both the inner and outer plates 4 are U-shaped, with their ends fixed to the workbench 1. Multiple circular holes are formed on the outer wall of the inner plate 4, into which push rods 6 are embedded. Parts of the push rods 6 extend out of the holes towards the outer plates 5. A baffle is fixedly installed on the outer wall of the push rods 6, facing the outer plate 5. Multiple sensors 8 are embedded on the outer wall of the outer plate 5, their positions and numbers corresponding to the push rods 6. A spring 7 is installed between the baffle on the outer wall of the push rod 6 and the inner wall of the outer plate 5. One end of the spring 7 is fixedly connected to the baffle on the push rod 6, and the other end is fixedly connected to the inner wall of the outer plate 5.

[0016] Example: The corrugated pipe is placed on the support block 2 through the inner plate 4. The two ends of the corrugated pipe are respectively fitted onto the sleeves 10 at both ends of the workbench 1. In the initial state, the thread on the inner wall of the fixing ring 9 is not fully connected to the thread on the sleeve 10. After the corrugated pipe end is fitted, the fixing ring 9 is rotated and tightened. The groove at one end of the fixing ring 9 clamps and seals the outer wall of the corrugated pipe end with the outer wall of the sleeve 10. The external air pump is connected to the air pump pipe 3. The external air pump introduces a certain amount of compressed air into the corrugated pipe from the air pump pipe 3. The corrugated pipe expands with air intake. After expansion, the outer wall of the corrugated pipe pushes the push rod 6 on the inner plate 4. After the push rod 6 is pushed, the spring 7 contracts. The end of the push rod 6 contacts the sensor 8 on the outer plate 5. The sensor 8 is a contact sensor. After the push rod 6 contacts the sensor 8 for a certain period of time, it sends an electrical signal to the control terminal of the workbench 1.

[0017] After a certain period of time, if multiple push rods 6 remain in contact with sensor 8, it indicates that the bellows expansion remains unchanged, the sealing is normal, and there is no air leakage. If one or more push rods 6 detach from sensor 8, it indicates that the bellows' sealing is insufficient, resulting in air leakage. The bellows will decrease in volume after leakage. The control terminal of workbench 1 determines the bellows' sealing performance by analyzing the number of electrical signals from sensor 8, and the resulting data is fed back to the operator.

[0018] It should be noted that the parts not covered in this utility model are the same as or can be implemented using existing technology; the various drives in this utility model can be implemented by corresponding power structures such as cylinders, oil cylinders, electric cylinders, and motors in conjunction with connecting rods, guide rods, etc., and are not limited to the structures described in the specification and the drawings.

[0019] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. An airtightness testing device for the production of exhaust bellows, comprising a workbench (1) and a testing component mounted on the workbench (1), characterized in that: The detection assembly includes two air pipes (3), two sleeves (10), and two fixing rings (9). The two air pipes (3) are respectively installed at the ends of the workbench (1) and are symmetrically arranged. The two sleeves (10) are both sleeved and installed on the outside of the air pipes (3). A rubber block is clamped between the inner wall of the sleeve (10) and the outer wall of the air pipe (3). The outer wall of the sleeve (10) facing the end of the workbench (1) is threaded. The inner wall of the fixing ring (9) is threaded and threaded to the outer wall of the sleeve (10). The outer wall of the fixing ring (9) away from the end of the workbench (1) is grooved.

2. The airtightness testing device for exhaust bellows production according to claim 1, characterized in that: A support block (2) is fixedly installed on the table surface of the workbench (1). A groove is provided on the top surface of the support block (2). A fixing ring (9) is installed above the end of the support block (2). A film is held between the outer wall of the fixing ring (9) and the groove of the support block (2).

3. The airtightness testing device for exhaust bellows production according to claim 2, characterized in that: Two outer plates (5) are installed between the two air pipes (3). The two outer plates (5) are symmetrically arranged. An inner plate (4) is provided inside the two outer plates (5). The inner plate (4) is installed above the support block (2). Both the inner plate (4) and the outer plate (5) are U-shaped plates. The two ends of the inner plate (4) and the outer plate (5) are fixed to the table surface of the workbench (1).

4. The airtightness testing device for exhaust bellows production according to claim 3, characterized in that: The outer wall of the inner plate (4) has multiple round holes, and a push rod (6) is installed in each round hole. Part of the push rod (6) extends out of the round hole and faces the outer plate (5). A baffle is fixedly installed on the outer wall of the push rod (6) and is located on the outer wall of the push rod (6) facing the outer plate (5). Multiple sensors (8) are installed on the outer wall of the outer plate (5). The installation position and number of the sensors (8) correspond to the push rod (6).

5. The airtightness testing device for exhaust bellows production according to claim 4, characterized in that: A spring (7) is installed between the baffle on the outer wall of the push rod (6) and the inner wall of the outer plate (5). One end of the spring (7) is fixedly connected to the baffle of the push rod (6), and the other end is fixedly connected to the inner wall of the outer plate (5).

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