A corrugation detection and alarm device for a corrugated pipe

Abstract

The present application discloses a corrugation detection and alarm device for a bellows. After gas or liquid is input into the sealed bellows, there will be a downward pressure in the bellows. At this time, the inclined supporting wheel in contact with the bellows will move in the direction of the downward tilt of the flap under the downward pressure, so that the contact point between the supporting wheel and the bellows is in a continuous changing process, thereby avoiding the part where the bellows and the supporting wheel are not in complete contact and sealed. When there is damage to the part where the supporting wheel and the bellows are in complete sealed contact, the problem that the gas or liquid in the bellows cannot be discharged will not occur.

Description

Technical Field

[0001] This application relates to the technical field of bellows detection, and particularly to a bellows corrugation detection and alarm device. Background Art

[0002] After the bellows is manufactured, it needs to be subjected to inspections such as size, damage, sealing, over-temperature and over-pressure, and the bellows that do not meet the design requirements are screened out. Different inspections require different inspection devices. Taking the sealing inspection as an example, the inspector needs to block both ends of the bellows, place it in a safe environment, and then input gas at a certain air pressure (generally 1.1 to 1.2 times the design pressure). There is also a hydrostatic test, which is similar to the air pressure test. One end of the pipe fitting needs to be closed, and the other end is connected to a pressure test pump. Then water is injected into the pipe fitting, and the pressure is gradually increased to the specified test pressure (generally about 1.5 times the design pressure of the pipe fitting), and maintained for a certain period of time (usually according to the standard requirements, such as 10 to 30 minutes). During the test, observe whether there are any phenomena such as leakage or rupture of the pipe fitting.

[0003] In this detection method, the bellows will be directly placed on the ground or on a mounting rack. At this time, the contact part between the bellows and the ground or the mounting rack will be in a contact sealing state. If there is damage at the contact part, the gas or liquid filled in the bellows cannot effectively escape from the contact part. This sealing state will cause the contact part to not obtain an effective sealing detection. Moreover, in the actual working state, most of the gas or liquid in contact with the bellows is in a flowing state, and the impact force and pressure state are constantly changing. The existing static air pressure or hydraulic pressure detection cannot effectively conduct experiments for the actual working state. Summary of the Invention

[0004] This application proposes a bellows corrugation detection and alarm device, which has a detection cylinder to provide a safe and multi-directional detection space, an airbag expands to seal the bellows, the bellows presses down on the support wheel group and moves in an inclined downward direction, the T-shaped bottom presses the slider to release the force stored in spring II, and spring II and spring III cooperate with the airbag to drive the support wheel group to move upward and backward. The moving support wheel group drives the bellows to move upward and rubs the corrugations on the outer side of the bellows. The moving bellows affects the local air pressure inside to simulate the air pressure environment in actual operation. The moving bellows affects the flap in the reverse direction through the support wheel group, so as to solve the problems of various existing detection devices, high cost, and the inability to obtain effective detection of the bellows bottom contact part.

[0005] To achieve the above object, the present application adopts the following technical solution: A corrugation detection and alarm device for a corrugated pipe, comprising a detection cylinder providing a detection space, both ends of the detection cylinder are hermetically sealed with sealing plates, a positioning post is provided on the side of the sealing plate facing the inner cavity of the detection cylinder, an airbag is provided on the positioning post, an inflation pipe is connected to the airbag for expanding the airbag to seal the corrugated pipe, and an air inlet pipe is provided on the sealing plate to penetrate through the positioning post for inputting high-pressure gas and liquid into the sealed corrugated pipe; an installation seat is provided at the inner bottom of the detection cylinder, a plurality of uniformly distributed reciprocating grooves are opened on the installation seat, and a support wheel group is movably sleeved in the reciprocating grooves for supporting the corrugated pipe placed in the detection cylinder. The support wheel group includes positioning frames symmetrically arranged on both lateral sides and roller groups provided at the upper and lower ends of the positioning frames; an exhaust pipe is provided at the top of the detection cylinder, and a sensor is provided in the exhaust pipe.

[0006] Preferably, the positioning frame includes a T-shaped bottom below, a sleeve I connected to the top end of the T-shaped bottom, a connecting rod connected to the top end of the sleeve I, and a sleeve II connected to the top end of the connecting rod, providing stable support for the roller group.

[0007] Preferably, the lower roller group includes a central shaft I and two symmetric rollers sleeved on the central shaft I, and the upper roller group includes a central shaft II and two symmetric support wheels sleeved on the central shaft II for contacting the corrugated pipe to provide a supporting force. Both ends of the central shaft I are respectively sleeved in two symmetric sleeve Is, and both ends of the central shaft II are respectively sleeved in two symmetric sleeve IIs for connecting the positioning frame to maintain stability.

[0008] Preferably, a flap is provided in the reciprocating groove, a hinge rod is provided at the center of the flap and connected to both side walls of the reciprocating groove for providing a support point for the flap to swing at a fixed point, two symmetric limiting rods are provided below the flap for limiting the downward swing angle of the flap, and two symmetric spring IIs are provided at the bottom end of the flap. The two spring IIs are respectively close to one of the limiting rods for providing a restoring force for the flap to deflect in the reverse direction.

[0009] Preferably, four pairwise symmetric retraction holes are opened on both side walls of the reciprocating groove, a slider is provided in the retraction hole, a spring I is provided between the slider and the bottom of the retraction hole, an arc surface is opened at the top end of the slider close to the hinge rod for smoothly receiving the thrust when the side of the flap moves downward, and an inclined surface is opened at the side of the slider far from the inside of the reciprocating groove close to the hinge rod for cooperating with the arc surface to receive the thrust when the side of the flap moves downward and receiving the thrust in the advancing direction of the T-shaped bottom.

[0010] Preferably, the roller is placed at the top of the flap, and is used to contact the flap to provide supporting force. The bottom end of the T-bottom is higher than the bottom end of the roller, and is used to tilt the entire supporting wheel group. The side of the T-bottom facing the inclined surface is provided with an inclined edge opposite to the inclined surface, and is used to push the slider to retract into the retraction hole when moving forward. The bottom end length of the T-bottom is greater than the diameter of the roller, and is used for the roller to contact the slider in the forward direction first.

[0011] Preferably, a sleeve III is provided at the center of the axial rod I, a spring III is provided on one side of the sleeve III, and one end of the spring III away from the sleeve III is connected to the inner wall of the reciprocating groove to provide power to support the reset of the wheel assembly.

[0012] Preferably, a movable groove is provided on the side of the sealing plate facing the inner cavity of the detection tube, and a limit block movably sleeved in the movable groove is provided at one end of the positioning column close to the sealing plate. The length of the movable groove is greater than the length of the limit block, so as to provide space for the positioning column to move up and down.

[0013] The present application provides a bellows detection alarm device for a bellows. After gas or liquid is input into the sealed bellows, there will be downward pressure on the bellows. At this time, the inclined support wheel in contact with the bellows will move in the downward direction of the flap under the downward pressure, so that the contact point between the support wheel and the bellows is in a continuous changing process, so that the bellows and the support wheel are not in complete contact with the sealed part, avoiding the problem of gas or liquid in the bellows being unable to be discharged when the part where the support wheel and the bellows are in complete sealed contact is damaged.

[0014] At the same time, the T-bottom will move in the same direction as the supporting wheel, and the end of the T-bottom that is in the inclined downward direction will squeeze the inclined surface of the slider, causing the slider to retract into the retraction hole, thereby releasing the restriction on the upward deflection of this side of the flap. At this time, the energy-storing springs II on both sides will drive the flap to deflect around the hinged rod (the end that was originally in a low position deflects upward, and the end that was originally in a high position deflects downward). At the same time, the stretched spring III will provide a reset pulling force to the supporting wheel group, and cooperate with the force of spring II to move the supporting wheel group to reset. At this time, the flap will tilt downward to the other side that was originally inclined downward, causing the reset supporting wheel group to move to this side, and so on, causing the supporting wheel group to reciprocate, so that the supporting wheel is in rolling contact with the corrugation on the outer side of the bellows, causing the bellows to move up and down intermittently, causing the static gas or liquid in the bellows to flow, simulating the fluctuation state of gas or liquid under actual working conditions, so as to perform dynamic detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which constitute a part of the specification, illustrate embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application.

[0016] With reference to the accompanying drawings, the present application can be more clearly understood according to the following detailed description, wherein:

[0017] Figure 1 It is a schematic three-dimensional structure diagram of the present invention;

[0018] Figure 2 It is a schematic diagram of the internal structure distribution of the present invention;

[0019] Figure 3 It is the present invention Figure 2 A partial enlarged schematic diagram of the structure at A in;

[0020] Figure 4 It is a schematic diagram of the structure of the support wheel assembly of the present invention;

[0021] Figure 5 It is a schematic diagram of the structural position of the flap and the support wheel assembly of the present invention;

[0022] Figure 6 It is a schematic diagram of the structural position of the sealing plate and the positioning column of the present invention;

[0023] Figure 7 It is a schematic diagram of the sealing plate structure of the present invention;

[0024] Figure 8 It is a schematic diagram of the positioning column structure of the present invention;

[0025] Figure 9 It is a schematic diagram of the slider structure of the present invention.

[0026] Wherein: 1. Detection cylinder; 2. Mounting seat; 201. Retraction hole; 3. Exhaust pipe; 4. Sealing plate; 41. Movable groove; 5. Positioning column; 51. Limiting block; 6. Airbag; 7. Intake pipe; 8. Inflation pipe; 9. Reciprocating groove; 10. Limiting rod; 11. Slider; 111. Arc surface; 112. Inclined surface; 12. Spring I; 13. Hinge rod; 131. Flap; 132. Spring II; 14. T-shaped bottom; 15. Sleeve I; 16. Connecting rod; 17. Sleeve II; 18. Axle rod I; 19. Roller; 20. Axle rod II; 21. Support wheel; 22. Sleeve III; 23. Spring III. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0028] Embodiment 1

[0029] Please refer toFigures 1 to 4 , a corrugated pipe corrugation detection and alarm device, including a detection cylinder 1. The detection cylinder 1 is in the shape of a hollow cylinder. The corrugated pipe to be detected is placed into the detection cylinder 1 to provide a safe detection environment. At the bottom end of the inner cavity of the detection cylinder 1, a mounting seat 2 is fixedly connected in the axial direction. A plurality of evenly distributed reciprocating grooves 9 are formed in the mounting seat 2 in the axial direction. A support wheel set is movably sleeved in the reciprocating grooves 9. The corrugated pipe placed into the detection cylinder 1 is supported by the support wheel set, so that the corrugated pipe is suspended in the detection cylinder 1.

[0030] Refer to Figures 2 to 5 , the support wheel set includes positioning frames symmetrically arranged on the left and right sides and roller sets movably sleeved on the upper and lower ends of the positioning frames. The positioning frame includes a T-shaped bottom 14 at the lower part, a sleeve I 15 fixedly connected to the top end of the T-shaped bottom 14, a connecting rod 16 fixedly connected to the top end of the sleeve I 15, and a sleeve II 17 fixedly connected to the top end of the connecting rod 16. Support forces on both sides are formed by the positioning frames on both sides. Under the stable condition of the long sides on both sides of the T-shaped bottom 14, the whole support wheel set is prevented from toppling forward (in the axial direction of the detection cylinder 1). The lower roller set includes a shaft I 18 and two symmetric rollers 19 fixedly sleeved on the shaft I 18. The upper roller set includes a shaft II 20 and two symmetric support wheels 21 fixedly sleeved on the shaft II 20. The two ends of the shaft I 18 are respectively movably sleeved in two symmetric sleeve I 15s. The two ends of the shaft II 20 are respectively movably sleeved in two symmetric sleeve II 17s. Thus, the positioning frames support the upper and lower roller sets stably, enabling the rollers 19 to rotate around the sleeve I 15 with the shaft I 18 as the center, and enabling the support wheels 21 to rotate around the sleeve II 17 with the shaft II 20 as the center.

[0031] Refer to Figures 1 to 2 , Figures 6 to 8, sealing plates 4 are fixedly connected to both ends of the detection cylinder 1 respectively. The connection method between the sealing plate 4 and the detection cylinder 1 can be bolt fixation or snap fixation, etc., which are fixation methods that can perform sealed connection. The detection cylinder 1 is sealed through the sealing plate 4 to maintain a safe detection environment inside the detection cylinder 1 and avoid excessive influence of external variables such as air and temperature on the detection results. An activity groove 41 is opened on the side of the sealing plate 4 facing the inner cavity of the detection cylinder 1. A limiting block 51 is movably sleeved in the activity groove 41. A positioning column 5 is fixedly connected to the side of the limiting block 51 facing the inner cavity of the detection cylinder 1. An airbag 6 is fixedly sleeved on the circumferential outer side of the positioning column 5. An air inlet pipe 7 and an inflation pipe 8 are fixedly sleeved in the sealing plate 4. One end of the air inlet pipe 7 penetrates through the sealing plate 4 to the outside of the detection cylinder 1, and the other end penetrates through the limiting block 51 and the positioning column 5 to communicate with the inner cavity of the detection cylinder 1, so that when detecting the corrugated pipe, high-pressure gas, high-pressure liquid, low-temperature gas or high-temperature gas can be input into the sealed corrugated pipe through the air inlet pipe 7 to comprehensively detect the corrugated pipe from different directions through a detection device. One end of the inflation pipe 8 penetrates through the sealing plate 4 to the outside of the detection cylinder 1, and the other end penetrates through the limiting block 51 and the positioning column 5 to communicate with the airbag 6, so that the inflation pipe 8 can input gas into the airbag 6 to make the airbag 6 expand. At this time, the outer side of the airbag 6 will be pressed against the inner wall of the corrugated pipe to be detected, so that both ends of the corrugated pipe are closed. At this time, with the support of the positioning column 5, the corrugated pipe is kept at a certain height in the detection cylinder 1. However, due to the flexible fixation at both ends, the corrugated pipe still has a downward trend under its own weight, especially at the position in the middle of the corrugated pipe far from the flexible fixation at both ends, the downward movement trend is stronger.

[0032] Refer to Figures 1 to 2 , an exhaust pipe 3 is fixedly connected to the top end of the detection cylinder 1. An inductor is fixedly sleeved in the exhaust pipe 3. The type of the inductor can be changed according to the actual detection direction. For example, when detecting damage, it can be changed to an air flow inductor, and when detecting temperature, it can be changed to a temperature inductor. Taking the damage of the corrugated pipe as an example, when high-pressure gas is input into the corrugated pipe, leakage will occur, resulting in an increase in the air pressure inside the detection cylinder 1. At this time, the inductor in the exhaust pipe 3 will upload the detected air pressure change to the detection program and give a real-time alarm when it exceeds the set value.

[0033] Embodiment 2

[0034] Please refer to Figures 2 to 5, on the basis of the first embodiment, in the axial direction of the detection cylinder 1, two symmetric limiting rods 10 are fixedly connected to the inner bottom of the reciprocating groove 9. Above the limiting rods 10, there is a flap 131. The distance value between the limiting rods 10 and the horizontal flap 131 is not greater than ten centimeters, so that when both sides of the flap 131 deflect downward, they can always be restricted by the limiting rods 10 and will no longer deflect after forming a certain inclination angle. The inclined flap 131 will provide an inclined surface for the upper support wheel set, resulting in the entire support wheel set being inclined. However, at this time, the downward-inclined side of the bottom of the T-shaped bottom 14 will contact the flap 131 to control the inclination angle of the support wheel set. A hinge rod 13 is fixedly sleeved at the center of the flap 131. Both ends of the hinge rod 13 are movably sleeved in the two side walls of the reciprocating groove 9, so that the flap 131 can rotate around the hinge rod 13 as the center under the action of an external force. The hinge rod 13 is vertically staggered with the axis of the detection cylinder 1. Two symmetric springs II 132 are fixedly connected to the bottom end of the flap 131. The two springs II 132 are respectively close to one of the limiting rods 10, so that when the flap 131 inclines to one side under the action of an external force, the spring II 132 on the same side will be compressed to store energy, while the spring II 132 on the other side will be stretched to store energy. When the flap 131 needs to be reset, the two springs II 132 will provide the power for resetting.

[0035] Refer to Figures 4 to 5 , Figure 9, on both side walls in the width direction of the reciprocating groove 9, four symmetrically arranged retraction holes 201 are provided. A slider 11 is movably sleeved in the retraction hole 201. A spring I 12 is arranged between the slider 11 and the bottom of the retraction hole 201. One end of the spring I 12 is fixedly connected to the bottom of the retraction hole 201, and the other end is fixedly connected to the end of the slider 11 facing the bottom of the retraction hole 201, enabling the slider 11 to reciprocate in the retraction hole 201. The end of the slider 11 away from the spring I 12 extends into the reciprocating groove 9 and is close to the side of the flap 131 away from the hinge rod 13. An arc surface 111 is provided at the top of the end of the slider 11 close to the hinge rod 13. An inclined surface 112 is provided on the side of the end of the slider 11 away from the reciprocating groove 9 and close to the hinge rod 13. Before detection, an external force is applied to one side of the flap 131, causing the flap 131 to deflect downward to this side. The side of the flap 131 on this side will contact the arc surface 111 and the inclined surface 112 downward, causing the slider 11 to be forced to retract into the retraction hole 201 and compress the spring I 12. Then, the flap 131 will reach below the slider 11 and abut against the limiting rod 10. At this time, the slider 11 is reset under the drive of the spring I 12 and is located above this side of the flap 131, hindering the flap 131 from lifting. At this time, the external force is removed to keep the flap 131 stable. The spring II 132 below this side is compressed to store energy, and the spring II 132 below the other side is stretched to store energy. At this time, the support wheel set above the flap 131 is tilted synchronously due to the tilt of the flap 131 until the downward-tilted end of the T-shaped bottom 14 contacts the flap 131. Under the action of gravity, the support wheel set will move a certain distance in the downward-tilted direction, stretching the spring III 23 until the component force of the spring III 23 due to the tilt of the support wheel set is balanced.

[0036] Refer to Figures 3 to 5The roller 19 is placed on the top of the flap 131, and the bottom of the T-bottom 14 is higher than the bottom of the roller 19. The T-bottom 14 is in an inverted T shape, so that when the flap 131 is tilted, the upper support wheel group is tilted synchronously due to the tilt of the flap 131, until the end of the T-bottom 14 tilted downward contacts the flap 131. Under the action of gravity, the support wheel group will move a distance in the tilted downward direction, stretching the spring III 23 until the spring III 23 is equal to the tilt component of the support wheel group. The side of the T-bottom 14 facing the inclined surface 112 is provided with a support member opposite to the inclined surface 112. The length of the bottom end of the T-bottom 14 is greater than the diameter of the roller 19, and the side of the T-bottom 14 fits the side wall of the reciprocating groove 9, so that after the bellows is placed in the detection tube 1, the support wheel 21 will contact the bellows. At this time, the downward force of the bellows is pressed on the support wheel 21, especially after the high-pressure gas or liquid is continuously input into the bellows, the downward force of the bellows will increase, and the support wheel 21 will transmit the force to the entire support wheel group, so that the roller 19 moves to the side that is inclined downward. At this time, the spring III 23 is quickly stretched, and the bellows will also move downward, and the airbag 6 will also be compressed downward, so that The end of the T-bottom 14 tilted downward first contacts the inclined surface 112, squeezing the slider 11 back into the retraction hole 201. At this time, the flap 131 loses the upward restriction of the slider 11, and the two energy-storing springs II 132 will drive the flap 131 to reverse, pushing the entire support wheel group to move upward, and cooperate with the stretched spring III 23 to pull the support wheel group backward (the opposite direction of the original movement direction), so that the support wheel group cooperates with the compressed airbag 6 to transmit the upward force to the bellows, driving the bellows to lift up. At the same time, the reciprocating motion of the support wheel group in the axial direction of the detection tube 1 will also be driven by the support wheel dial. The corrugations on the outside of the dynamic bellows cause the entire bellows to move up and down, and cooperate with the corrugations inside the bellows to affect the local air pressure inside the bellows, simulating the unstable air pressure under actual working conditions and improving the detection effect. It should be noted that when the bellows moves up and down, the force of the up and down movement will also be transmitted to the support wheel 21, so that the support wheel group transmits the force to the flap 131 below, so that the flap 131 is in a swinging state. When the flap 131 squeezes the slider 11 on one side again during the swinging process and is restricted from moving, the above action will be repeated again until the energy is exhausted.

[0037] See also Figures 2 to 3 The center of the axial rod Ⅰ18 is movably sleeved with a sleeve Ⅲ22, one side of the sleeve Ⅲ22 is fixedly connected with a spring Ⅲ23, and one end of the spring Ⅲ23 away from the sleeve Ⅲ22 is fixedly connected to the inner wall of the reciprocating groove 9.

[0038] See also Figures 6 to 8The cross-sections of the movable groove 41 and the limit block 51 are both T-shaped with the same size. The length of the movable groove 41 is greater than the length of the limit block 51, so that the positioning column 5 can control the up and down movement of the bellows under the restriction of the limit block 51, so that the bellows will not separate from the supporting wheel group. The air intake pipe 7 and the inflation pipe 8 are both hoses, so that when the positioning column 5 moves, the air intake pipe 7 and the inflation pipe 8 can still carry out airflow transportation.

Claims

1. A corrugation detection alarm device for a corrugated pipe, characterized in that: The invention comprises a detection cylinder (1) providing a detection space, the two end openings of the detection cylinder (1) being sealed with sealing plates (4), a positioning column (5) being arranged on a side of the sealing plate (4) facing the inner cavity of the detection cylinder (1), an air bag (6) being arranged on the positioning column (5), an inflation tube (8) being connected to the air bag (6) for inflating the air bag (6) and sealing the bellows, an air inlet tube (7) being arranged on the sealing plate (4) and penetrating the positioning column (5) for inputting high-pressure gas and liquid into the sealed bellows; A mounting seat (2) is provided at the bottom inner side of the detection cylinder (1), and the mounting seat (2) is provided with evenly distributed reciprocating grooves (9). A supporting wheel group is movably sleeved in the reciprocating groove (9) for supporting the corrugated tube placed in the detection cylinder (1), and the supporting wheel group comprises a positioning frame symmetrical on both sides in the transverse direction and a roller group arranged at the upper and lower ends of the positioning frame; An exhaust pipe (3) is arranged at the top end of the detection cylinder (1), and a sensor is arranged inside the exhaust pipe (3); A flap (131) is arranged in the reciprocating groove (9), and a hinged rod (13) is arranged at the center of the flap (131) and connected to the two side walls of the reciprocating groove (9) to provide a support point for the flap (131) to swing at a fixed point. Two symmetrical limit rods (10) are arranged below the flap (131) to limit the angle of the flap (131) to swing downward. Two symmetrical springs II (132) are arranged at the bottom end of the flap (131), and the two springs II (132) are respectively close to one of the limit rods (10) to provide a restoring force for the flap (131) to deflect in the opposite direction. Two hinged rods (13) are respectively arranged on the two side walls of the reciprocating groove (9) to provide a restoring force for the flap (131) to deflect in the opposite direction. There are two front-to-back symmetrical retraction holes (201), a slider (11) is arranged in the retraction hole (201), a spring I (12) is arranged between the slider (11) and the bottom of the retraction hole (201), a curved surface (111) is provided on the top of one end of the slider (11) close to the hinge rod (13), and is used to smoothly receive the thrust when the flap (131) moves downward sideways, and an inclined surface (112) is provided on one side of the slider (11) away from the reciprocating groove (9) and close to the hinge rod (13), and is used to cooperate with the curved surface (111) to receive the thrust when the flap (131) moves downward sideways, and to receive the thrust in the forward direction of the T-bottom (14).

2. A corrugation detection alarm device for a corrugated pipe according to claim 1, characterized in that: The positioning frame comprises a T-shaped bottom (14) at the bottom, a sleeve I (15) connected to the top of the T-shaped bottom (14), a connecting rod (16) connected to the top of the sleeve I (15), and a sleeve II (17) connected to the top of the connecting rod (16), providing stable support for the roller assembly.

3. A corrugation detection alarm device for a corrugated pipe according to claim 2, characterized in that: The roller assembly at the bottom includes an axial rod I (18) and two symmetrical rollers (19) sleeved on the axial rod I (18), and the roller assembly at the top includes an axial rod II (20) and two symmetrical support wheels (21) sleeved on the axial rod II (20), which are used to contact the corrugated tube to provide supporting force. The two ends of the axial rod I (18) are respectively sleeved in two symmetrical sleeves I (15), and the two ends of the axial rod II (20) are respectively sleeved in two symmetrical sleeves II (17), which are used to connect the positioning frame to maintain stability.

4. A corrugation detection alarm device for a corrugated pipe according to claim 3, characterized in that: The roller (19) is placed on the top of the flap (131) and is used to contact the flap (131) to provide a supporting force. The bottom end of the T-bottom (14) is higher than the bottom end of the roller (19) and is used to tilt the entire supporting wheel assembly. The side of the T-bottom (14) facing the inclined surface (112) is provided with an inclined edge opposite to the inclined surface (112) and is used to push the slider (11) to retract into the retraction hole (201) when moving forward. The bottom end length of the T-bottom (14) is greater than the diameter of the roller (19) and is used to allow the roller (19) to contact the slider (11) in the forward direction.

5. The corrugation detection alarm device for a corrugated pipe according to claim 4, characterized in that: A sleeve III (22) is arranged at the center of the axial rod I (18), a spring III (23) is arranged on one side of the sleeve III (22), and one end of the spring III (23) away from the sleeve III (22) is connected to the inner wall of the reciprocating groove (9) for providing power to support the reset of the wheel assembly.

6. The corrugation detection alarm device for a corrugated pipe according to claim 1, characterized in that: A movable groove (41) is provided on a side of the sealing plate (4) facing the inner cavity of the detection tube (1); a limit block (51) movably sleeved in the movable groove (41) is provided on one end of the positioning column (5) close to the sealing plate (4); the length of the movable groove (41) is greater than the length of the limit block (51), and is used to provide space for the positioning column (5) to move up and down.

Images