A detection machine for rubber bellows transverse swing test

Abstract

The present application belongs to the technical field of bellows detection, and particularly relates to a detection machine for rubber bellows transverse swing test, which comprises a rack, a pair of swing mechanisms fixedly connected to the rack, and an air bag connected to the swing mechanisms; the air bag is used for sealing two ends of the bellows, and the swing mechanisms can drive the two ends of the bellows to swing synchronously or a single end to swing; the swing mechanism comprises a fixing frame, a swing frame rotatably connected to the fixing frame, and a connecting rod fixedly connected to the swing frame, and the air bag is fixedly installed on the connecting rod; a tensioning assembly is fixedly connected to the connecting rod and used for tensioning the inner wall of the bellows; a rotating disc is rotatably connected to the fixing frame, and a connecting rod is rotatably connected between the rotating disc and the swing frame; the swing mechanism is driven to move by the driving mechanism, thereby driving the two ends of the bellows to swing synchronously or a single end to swing, and the detection mode of the bellows is improved, so that the detection result is more real and reliable.

Description

Technical Field

[0001] This invention relates to the field of corrugated pipe testing technology, and in particular to a testing machine for lateral swing testing of rubber corrugated pipes. Background Technology

[0002] A bellows is a tubular elastic sensitive element made of foldable corrugated sheets connected along the folding and stretching direction. The bellows has a thin wall, its open end is fixed, and its sealed end is in a free state. It uses an auxiliary helical spring or leaf spring to increase elasticity. Bellows are sometimes also used as isolation elements.

[0003] Existing bellows testing devices typically seal both ends of the bellows before filling it with gas or liquid and observing for leaks to determine its sealing performance. However, bellows are often in a bent or swaying state during transport or actual use. This testing method has relatively low requirements for bellows sealing performance and operates in a mild environment, making it impossible to accurately assess the sealing performance of the bellows when it is bent or in motion. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a testing machine for lateral swing testing of rubber bellows. By incorporating a swing mechanism to drive the bellows in swing motion, the sealing performance of the bellows under swing conditions can be detected, thereby solving the problems in the prior art.

[0005] To achieve the above-mentioned technical objectives, the specific technical solution of the present invention is as follows: The present invention proposes a testing machine for a transverse swing test of a rubber corrugated pipe, comprising: a frame, a pair of swing mechanisms fixedly connected to the frame, and an airbag connected to the swing mechanisms; the airbag is used to seal both ends of the corrugated pipe, and the swing mechanism can drive both ends of the corrugated pipe to swing synchronously or swing at one end only; the swing mechanism includes a fixed frame, a swing frame rotatably connected to the fixed frame, and a connecting rod fixedly connected to the swing frame, the airbag being fixedly installed on the connecting rod; and a tensioning component is fixedly connected to the connecting rod for tensioning the inner wall of the corrugated pipe; a rotating disk is rotatably connected to the fixed frame, and a connecting rod is rotatably connected between the rotating disk and the swing frame.

[0006] As a preferred technical solution of the present invention, it further includes a drive mechanism for driving the swing mechanism to move; the drive mechanism includes a drive motor, a rotating shaft connected to the drive motor, and a drive gear and a rotating component fixedly installed at both ends of the rotating shaft; the rotating disk is coaxially fixedly connected to a driven gear that cooperates with the drive gear and the rotating component.

[0007] As a preferred embodiment of the present invention, the rotating component includes an outer gear ring, a ratchet rotatably connected inside the outer gear ring, and a plurality of pawls connected to the inner wall of the outer gear ring. The pawls cooperate with the ratchet, and an elastic element is connected between the pawls and the inner wall of the outer gear ring. The outer gear ring meshes with the driven gear, and the ratchet is fixedly connected to the rotating shaft.

[0008] As a preferred embodiment of the present invention, it also includes an air pump installed on the frame, the air pump being connected to the air bag via an air pipe, and a pressure relief valve being connected to the side of the air bag facing the inside of the bellows.

[0009] As a preferred embodiment of the present invention, a water inlet pipe is connected to the connecting rod for introducing water into the corrugated pipe. The water inlet pipe passes through the inside of the connecting rod and extends from the end of the connecting rod into the inside of the corrugated pipe. A sealing ring is connected between the water inlet pipe and the connecting rod, and a valve is connected to the water inlet pipe.

[0010] As a preferred embodiment of the present invention, the tensioning assembly includes: a fixed disk fixedly mounted on a connecting rod, and a rotating disk rotatably connected to the connecting rod; a plurality of support rods are slidably connected to the surface of the fixed disk, and the support rods are evenly distributed along the circumference of the fixed disk; a support block is fixedly connected to one end of each support rod, and the support block is in contact with the inner wall of the corrugated pipe.

[0011] As a preferred embodiment of the present invention, a shaft is fixedly connected to the support rod, and an arc-shaped hole is provided on the rotating disk that is slidably connected to the shaft. When the rotating disk rotates, it drives the shaft to slide in the arc-shaped hole, thereby driving the support rod to move.

[0012] As a preferred embodiment of the present invention, a retaining ring is fixedly connected to the shaft, and a locking nut is fixedly connected to the connecting rod for locking and fixing the rotating disk.

[0013] As a preferred embodiment of the present invention, the airbag center is fixedly connected to a connecting sleeve that is sealed to the connecting rod, and the connecting sleeve is fixedly installed on the surface of the connecting rod by a clamp.

[0014] The beneficial effects of this invention are as follows:

[0015] 1. This invention provides a pair of swing mechanisms connected to both ends of a bellows. The bellows is sealed at both ends by an airbag, and the bellows is tightened at both ends by a support assembly. The swing mechanism is driven by a drive mechanism, which causes the bellows to swing synchronously at both ends or swing at one end alone. This improves the detection method of the bellows and makes the detection results more accurate and reliable.

[0016] 2. This invention has a pressure relief valve connected to the airbag. When the air pressure inside the airbag reaches a certain value, the pressure relief valve opens automatically, and the gas automatically enters the bellows, making the bellows under high pressure. When water is introduced into the bellows through the water inlet pipe, the gas and liquid work together to detect the location of any leaks in the bellows more quickly. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the swing mechanism and drive mechanism proposed in this invention.

[0019] Figure 3 This is a schematic diagram of the swing mechanism, the tensioning component, and the airbag proposed in this invention.

[0020] Figure 4 for Figure 3 Another perspective diagram.

[0021] Figure 5 This is a schematic diagram of the driven gear, rotating disk, and swing frame.

[0022] Figure 6 This is a schematic diagram of the rotating component proposed in this invention.

[0023] Figure 7 This is a schematic diagram of the structure of the airbag proposed in this invention.

[0024] Figure 8 This is a schematic diagram of the airbag proposed in this invention from another angle.

[0025] Figure 9 This is a schematic diagram of the support assembly proposed in this invention.

[0026] In the diagram: 1. Frame; 2. Swinging mechanism; 21. Fixed frame; 22. Swinging frame; 23. Rotating disk; 24. Driven gear; 25. Connecting rod; 26. Connecting rod; 27. Rotating shaft; 3. Support assembly; 31. Fixed disk; 32. Rotating disk; 33. Support rod; 34. Support block; 35. Shaft; 36. Arc hole; 37. Retaining ring; 38. Locking nut; 4. Airbag; 41. Connecting sleeve; 42. Clamp; 43. Pressure relief valve; 44. Sealing ring; 5. Drive mechanism; 51. Rotating shaft; 52. Rotating component; 521. External gear ring; 522. Ratchet; 523. Pawl; 524. Elastic component; 53. Drive gear; 54. Drive motor; 6. Air pipe; 7. Air pump; 8. Valve; 9. Water inlet pipe. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0028] Example: This example discloses a testing machine for the lateral oscillation test of rubber bellows, such as... Figures 1-9 As shown, the device includes: a frame 1, a pair of swing mechanisms 2 fixedly connected to the frame 1, and an airbag 4 connected to the swing mechanisms 2; the airbag 4 is used to seal both ends of the bellows, and the swing mechanisms 2 can drive both ends of the bellows to swing synchronously or swing one end alone, increasing the testing methods for the bellows; it also includes an air pump 7 installed on the frame 1, the air pump 7 is connected to the airbag 4 through an air pipe 6, the air pipe 6 is connected to a pressure gauge and a one-way valve, the air pipe 6 is made of flexible hose to facilitate movement with the swing mechanisms 2, and the side of the airbag 4 facing the inside of the bellows is connected to a pressure relief valve 43; air is inflated into the airbag 4 by the air pump 7, the airbag 4 seals both ends of the bellows, and when the air pump 7 inflates the airbag 4, the airbag 4... The air pressure gradually increases. The pressure relief valve 43 has a pressure relief threshold of 0.4 MPa. When the pressure inside the airbag 4 exceeds 0.4 MPa, the pressure relief valve 43 automatically opens, and gas enters the bellows. At this time, the air pump 7 continuously injects air, causing the pressure inside the bellows to rise and the pressure inside the airbag 4 to decrease slightly. The pressure difference between the two gradually decreases. After the air pump 7 has been running for about 30 seconds, the air pressure inside the bellows rises to about 0.2 MPa. Then the air pump 7 is turned off. At this time, the gas inside the airbag 4 continues to enter the bellows. When the pressure difference between the airbag 4 and the bellows is less than 0.4 MPa, the pressure relief valve 43 automatically closes, ultimately bringing the pressure inside the airbag 4 to between 0.4 and 0.5 MPa.

[0029] like Figures 2-5 As shown, the swing mechanism 2 includes a fixed frame 21, a swing frame 22 rotatably connected to the fixed frame 21, and a connecting rod 26 fixedly connected to the swing frame 22. The fixed frame 21 is fixedly installed on the frame 1. A rotating shaft 27 is fixedly connected to the swing frame 22. A bearing seat rotatably connected to the rotating shaft 27 is fixedly connected to the fixed frame 21. The airbag 4 is fixedly installed on the connecting rod 26. A tensioning assembly 3 is fixedly connected to the connecting rod 26 for tensioning the inner wall of the bellows. The tensioning assembly 3 is located between the swing frame 22 and the airbag 4. A rotating disk 23 is rotatably connected to the fixed frame 21. A connecting rod 25 is rotatably connected between the rotating disk 23 and the swing frame 22. When the rotating disk 23 rotates circumferentially, it drives the swing frame 22 to swing back and forth about the rotating shaft 27 as the rotation point, thereby driving the bellows to swing laterally.

[0030] like Figure 2 and Figure 6As shown, this embodiment also includes a drive mechanism 5 for driving the swing mechanism 2 to move; the drive mechanism 5 includes a drive motor 54, a rotating shaft 51 connected to the drive motor 54, and drive gears 53 and rotating components 52 fixedly installed at both ends of the rotating shaft 51. The drive motor 54 is a DC motor capable of rotating in both directions. The drive motor 54 is mounted on a fixed frame 21, and the rotating shaft 51 is rotatably connected between two fixed frames 21. The drive motor 54 drives the rotating shaft 51 to rotate; wherein, the rotating disk 23 is coaxially fixedly connected to a driven gear 24 that cooperates with the drive gear 53 and the rotating component 52; when the drive motor 54 drives the rotating shaft 51 to rotate in the opposite direction, the driven gear 24... When the ratchet 522 rotates counterclockwise, it drives the outer gear ring 521 to rotate. The rotating component 52 drives the driven gear 24 to rotate, and the driven gear 24 drives the rotating disk 23 to rotate. At this time, the two rotating disks 23 rotate simultaneously, causing the two swinging mechanisms 2 to swing synchronously, causing both ends of the bellows to swing simultaneously. When the drive motor 54 drives the rotating shaft 51 to rotate in the forward direction, the ratchet 522 rotates clockwise and does not drive the outer gear ring 521 to rotate. At this time, the rotating component 52 does not drive the driven gear 24 to rotate. Only one rotating disk 23 rotates, so only one swinging mechanism 2 swings, causing one end of the bellows to swing. This allows for testing of the bellows' swing in different ways.

[0031] The rotating component 52 includes an outer gear ring 521, a ratchet 522 rotatably connected inside the outer gear ring 521, and several pawls 523 connected to the inner wall of the outer gear ring 521. The pawls 523 cooperate with the ratchet 522, and an elastic element 524 is connected between the pawls 523 and the inner wall of the outer gear ring 521. The elastic element 524 applies elastic force to the pawls 523. The outer gear ring 521 meshes with the driven gear 24. The ratchet 522 is fixedly connected to the rotating shaft 51. When the rotating shaft 51 drives the ratchet 522 to rotate in the forward direction, the ratchet 522 will not drive the outer gear ring 521 to rotate. When the rotating shaft 51 drives the ratchet 522 to rotate in the reverse direction, the ratchet 522 will drive the outer gear ring 521 to rotate, and the outer gear ring 521 will drive the driven gear 24 to rotate.

[0032] like Figures 7-8 As shown, a water inlet pipe 9 is connected to a connecting rod 26 on one of the swing mechanisms 2, for introducing water into the corrugated pipe. The water inlet pipe 9 is connected to an external water pipe. The water inlet pipe 9 passes through the inside of the connecting rod 26 and extends from the end of the connecting rod 26 into the inside of the corrugated pipe. A sealing ring 44 is connected between the water inlet pipe 9 and the connecting rod 26 to seal the water inlet pipe 9. A valve 8 is connected to the water inlet pipe 9. During testing, the water inlet pipe 9 is connected to the external water pipe, the valve 8 is opened, and water flows into the corrugated pipe through the water inlet pipe 9. About 1 / 3 of the water is injected into the corrugated pipe. Then the valve 8 is closed, and the water inlet pipe 9 is separated from the water pipe. The location of the leak point in the corrugated pipe can be determined by observing whether there is liquid leakage on the surface of the corrugated pipe.

[0033] like Figure 9 As shown, the tensioning assembly 3 includes: a fixed disk 31 fixedly mounted on the connecting rod 26, and a rotating disk 32 rotatably connected to the connecting rod 26; a handle is fixedly connected to the surface of the rotating disk 32 for easy rotation of the rotating disk 32; multiple support rods 33 are slidably connected to the surface of the fixed disk 31, the support rods 33 face the center of the fixed disk 31, and the support rods 33 are evenly distributed around the circumference of the fixed disk 31; a support block 34 is fixedly connected to one end of the support rod 33, the support block 34 is arc-shaped, and the support block 34 contacts the inner wall of the corrugated pipe; the support rod 3 A shaft 35 is fixedly connected to the rotating disk 32. An arc-shaped hole 36 is provided on the rotating disk 32, which is slidably connected to the shaft 35. The arc-shaped hole 36 is eccentrically set on the rotating disk 32. The rotation of the rotating disk 32 can drive the shaft 35 to slide in the arc-shaped hole 36, which drives the support rod 33 to move outward, so that the support block 34 is tightly supported against the inner wall of the bellows. The bellows is tightly fixed by the support assembly 3, so that the swing mechanism 2 can stably drive the bellows to swing when it swings, ensuring the sealing between the airbag 4 and the bellows during the swing process.

[0034] Preferably, a retaining ring 37 is fixedly connected to the shaft 35, which limits the rotation disk 32 and prevents the shaft 35 from separating from the arc-shaped hole 36. A locking nut 38 is fixedly connected to the connecting rod 26 for locking the rotation disk 32. After the support block 34 is tightened against the inner wall of the bellows, the rotation disk 32 is locked by the locking nut 38.

[0035] Preferably, the airbag 4 is fixedly connected to the center of the connecting sleeve 41, which is sealed to the connecting rod 26. The connecting sleeve 41 is fixedly installed on the surface of the connecting rod 26 by a clamp 42. The clamp 42 has a certain elasticity and is engaged with the surface of the connecting sleeve 41.

[0036] During testing, both ends of the corrugated pipe are fitted onto the airbag 4. Air is pumped into the airbag 4 using the air pump 7, sealing both ends of the corrugated pipe. When the air pressure inside the airbag 4 reaches a certain level, the pressure relief valve 43 automatically opens, allowing some gas to enter the corrugated pipe, creating a high-pressure environment. After the air pressure inside the airbag 4 decreases, the pressure relief valve 43 automatically closes. Then, approximately one-third of the water is injected into the corrugated pipe through the water inlet pipe 9. The drive mechanism 5 drives both ends of the corrugated pipe to swing synchronously or one end to swing independently, performing multiple swing tests at different frequencies. During the swing, the liquid oscillates inside the corrugated pipe, and the surface of the corrugated pipe is observed for any leakage, thus determining the sealing performance of the corrugated pipe. This embodiment performs different forms of swing tests on the corrugated pipe to simulate its state during transportation or actual use, and the test results more accurately reflect the sealing performance of the corrugated pipe.

[0037] Finally, it should be noted that in the description of this invention, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0038] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A testing machine for lateral oscillation testing of rubber bellows, characterized in that, include: The frame (1), a pair of swing mechanisms (2) fixedly connected to the frame (1), and an airbag (4) connected to the swing mechanism (2); The airbag (4) is used to seal both ends of the bellows, and the swing mechanism (2) can drive both ends of the bellows to swing synchronously or swing one end alone. The swing mechanism (2) includes a fixed frame (21), a swing frame (22) rotatably connected to the fixed frame (21), and a connecting rod (26) fixedly connected to the swing frame (22). The airbag (4) is fixedly installed on the connecting rod (26). Furthermore, a tensioning assembly (3) is fixedly connected to the connecting rod (26) for tensioning the inner wall of the bellows; A rotating disk (23) is rotatably connected to the fixed frame (21), and a connecting rod (25) is rotatably connected between the rotating disk (23) and the swing frame (22). It also includes a drive mechanism (5) for driving the swing mechanism (2) to move; the drive mechanism (5) includes a drive motor (54), a rotating shaft (51) connected to the drive motor (54), and a drive gear (53) and a rotating component (52) fixedly installed at both ends of the rotating shaft (51); the rotating disk (23) is coaxially fixedly connected to a driven gear (24) that cooperates with the drive gear (53) and the rotating component (52); the rotating component (52) includes an outer gear ring (521), a ratchet (522) rotatably connected inside the outer gear ring (521), and a plurality of pawls (523) connected to the inner wall of the outer gear ring (521). The pawls (523) cooperate with the ratchet (522), and an elastic element (524) is connected between the pawls (523) and the inner wall of the outer gear ring (521). The outer gear ring (521) meshes with the driven gear (24), and the ratchet (522) is fixedly connected to the rotating shaft (51); It also includes an air pump (7) installed on the frame (1), the air pump (7) is connected to the air bag (4) through the air pipe (6), and the side of the air bag (4) facing the inside of the bellows is connected to a pressure relief valve (43); a water inlet pipe (9) is connected to the connecting rod (26) for water to enter the bellows, the water inlet pipe (9) passes through the inside of the connecting rod (26) and one end extends out from the end of the connecting rod (26) to the inside of the bellows, and a sealing ring (44) is connected between the water inlet pipe (9) and the connecting rod (26), and a valve (8) is connected to the water inlet pipe (9).

2. The testing machine for the lateral oscillation test of rubber corrugated pipes according to claim 1, characterized in that, The tensioning assembly (3) includes: a fixed disk (31) fixedly installed on the connecting rod (26) and a rotating disk (32) rotatably connected to the connecting rod (26); a plurality of support rods (33) are slidably connected to the surface of the fixed disk (31), and the support rods (33) are evenly distributed around the circumference of the fixed disk (31); a support block (34) is fixedly connected to one end of the support rod (33), and the support block (34) is in contact with the inner wall of the corrugated pipe.

3. The testing machine for the lateral oscillation test of rubber corrugated pipes according to claim 2, characterized in that, A shaft (35) is fixedly connected to the support rod (33), and an arc-shaped hole (36) is provided on the rotating disk (32) that is slidably connected to the shaft (35). When the rotating disk (32) rotates, it drives the shaft (35) to slide in the arc-shaped hole (36), thereby driving the support rod (33) to move.

4. The testing machine for the lateral oscillation test of rubber corrugated pipes according to claim 3, characterized in that, A retaining ring (37) is fixedly connected to the shaft (35), and a locking nut (38) is fixedly connected to the connecting rod (26) for locking and fixing the rotating disk (32).

5. The testing machine for the lateral oscillation test of rubber corrugated pipes according to claim 4, characterized in that, The airbag (4) is fixedly connected to a connecting sleeve (41) that is sealed to the connecting rod (26). The connecting sleeve (41) is fixedly installed on the surface of the connecting rod (26) by a clamp (42).

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