Corrugated pipe service life monitoring and alarming device

Abstract

The invention discloses a corrugated pipe service life monitoring and alarming device, and relates to the technical field of pipeline equipment monitoring. The fastening bolt is in threaded connection to the fixing clamp, a sliding rod is fixedly connected to the inner side of the fixing clamp, a linkage plate is fixedly connected to the inner side of the fixing clamp, and a sliding rod is fixedly connected to the bottom of the linkage plate; the two expansion joints are movably installed in the two fixing clamps correspondingly, and the connecting main rod and the installation base are fixedly connected between the two expansion joints. A counting alarm assembly is arranged on the mounting seat; a contact monitoring assembly is arranged on the sliding rod, the effective compensation times of the corrugated pipe can be accurately recorded, reliable data support is provided for service life monitoring and management of the corrugated pipe, the situation that the corrugated pipe is damaged due to the fact that the effective compensation times exceed the upper limit can be effectively avoided, and damage to equipment and personnel due to medium leakage is avoided. And the operation condition of the medium in the pipeline can be known by monitoring the operation condition of the corrugated pipe in real time, the fluid parameter condition can be adjusted in time, and excessive impact on the whole system is avoided.

Description

Technical Field

[0001] This invention relates to the field of pipeline equipment monitoring technology, specifically to a corrugated pipe life monitoring and alarm device. Background Technology

[0002] As a thermal compensation element, bellows can compensate for pipeline thermal deformation, mechanical displacement, and absorb pipeline vibration. Due to its advantages such as simple assembly, good airtightness, small footprint, reliable operation, and large compensation capacity, it is widely used in various pipeline systems. However, the bellows fittings in bellows compensators operate under high stress at the material's yield limit for extended periods. Each deformation after being subjected to force leaves residual deformation. With repeated cycles, this residual deformation accumulates, eventually leading to bellows failure. The number of failure cycles is called the bellows' fatigue life.

[0003] Currently, most existing methods for monitoring the lifespan of corrugated pipes employ non-destructive testing (NDT) methods such as penetrant dye penetrant inspection of the weld seams. However, this method can only be performed periodically and cannot record the number of failure cycles of the corrugated pipe in real time. This makes it difficult to accurately grasp the lifespan status of the corrugated pipe in actual use, and it is very easy for the corrugated pipe to be damaged due to reaching the required number of failure cycles, resulting in equipment failure and personal injury, posing significant safety hazards and equipment maintenance and management challenges. To address these issues, we propose a corrugated pipe lifespan monitoring and alarm device. Summary of the Invention

[0004] The purpose of this invention is to provide a bellows life monitoring and alarm device to solve the problems of bellows.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a bellows life monitoring and alarm device, comprising: Two sets of fixing cards; Two sets of fastening bolts are threaded onto two sets of fixing clips. A sliding rod is fixed to the inner side of one set of fixing clips, and a linkage plate is fixed to the inner side of the other set of fixing clips. A sliding rod is fixed to the bottom of the linkage plate, and a fixing plate is fixed to the bottom of the sliding rod. Two sets of expansion joints are movably installed in two sets of fixing clips, and a connecting main rod is fixed between the two sets of expansion joints. A mounting base is fixed to the bottom of the connecting main rod. The mounting base is equipped with a counting alarm component; The slide bar is equipped with a contact monitoring component.

[0006] Preferably, the outer walls of both sets of fastening nuts are threadedly connected to the outer walls of the fixing clips, and the ends of both sets of fastening bolts extend into the fixing clips and fit against the outer side of the expansion joint.

[0007] Preferably, one end of the slide rod is provided with an open slot, the bottom of the fixed plate is fixedly connected with an integrated adjusting rod, the top of the slide rod is threadedly connected with a fixing bolt, and the outer wall of the fixing bolt is threadedly connected with a fixing nut. The adjusting rod is slidably connected between the top inner wall and the bottom inner wall of the opening groove, and the bottom end of the fixing bolt extends into the opening groove. Preferably, the outer wall of the slide rod is threaded with adjusting nuts near both ends, a washer is slidably sleeved on the end of the slide rod that fits against the adjusting nut, an insulating sleeve is slidably sleeved on the outer wall of the slide rod, and a spring is sleeved between the washer and the insulating sleeve on the outer wall of the slide rod. The outer wall of the slide rod is threaded near both ends, and the adjusting nut is connected to the outer wall of the slide rod through the thread.

[0008] Preferably, the outer wall of the slide bar is provided with a length mark between the two sets of insulating slide sleeves.

[0009] Preferably, the contact monitoring component includes a compression contact, a moving contact, an insulating sleeve, an elongation contact, and a notch. A compression contact is fixedly connected to the top of one set of insulating sleeves, and an elongation contact is fixedly connected to the top of another set of insulating sleeves. An insulating sleeve is fitted on the outer wall of the slide rod near the middle. A moving contact is slidably installed on the top of the slide rod. A notch is provided on the top of the insulating sleeve. The movable contact is slidably connected between the inner walls on both sides of the notch, and the bottom of the insulating sleeve is fixedly connected to the top of the fixed plate.

[0010] Preferably, the mounting base has two sets of mounting slots on its side; The two sets of mounting slots are arranged vertically.

[0011] Preferably, the counting alarm assembly includes a battery pack, a counter, and an audible and visual alarm device. The counter is fixedly installed in the upper set of mounting slots, and the audible and visual alarm device is fixedly connected to the end of the counter. The battery pack is fixedly installed in the lower set of mounting slots. The battery pack is electrically connected to the counter and the audible and visual alarm device.

[0012] Preferably, the compression contact and the extension contact are electrically connected by a wire; the wire is electrically connected to the battery pack, the counter, and the audible and visual alarm device, respectively.

[0013] Compared with the prior art, the beneficial effects of the present invention are: This invention, through its unique contact monitoring and counting structure, can accurately record the effective compensation times of the bellows in real time. Compared with traditional periodic non-destructive testing methods, it can obtain bellows life status information in a timely manner, providing reliable data for life management.

[0014] This invention uses a preset alarm value to issue an alarm when the effective compensation count of the bellows reaches the warning value. This can effectively prevent the bellows from being damaged due to exceeding the upper limit of the effective compensation count, prevent equipment failure and personal injury, and ensure the safe and stable operation of the equipment.

[0015] This invention, through its length adjustment and fixing mechanism, can adapt to bellows of varying lengths, thus broadening its application range. Simultaneously, the spring design effectively protects the contacts, improving the device's reliability and lifespan.

[0016] This invention, through its unique operating method, enables the device not only to be used for bellows life monitoring but also to be extended to other types of pipeline compensators. This facilitates effective life management of various pipeline compensators, improving the efficiency and level of equipment maintenance and management. In addition, the device can be designed to be integrated into control systems such as DCS, allowing centralized control personnel to understand the operation of the medium inside the pipeline through real-time monitoring of the bellows' operation, and to adjust the fluid parameters in a timely manner, avoiding excessive impact on the entire system.

[0017] This invention provides reliable data support for bellows life monitoring and management by accurately recording the effective compensation counts. It effectively prevents bellows damage due to exceeding the effective compensation limit, thus avoiding equipment and personnel injury caused by media leakage. Real-time monitoring of bellows operation also allows for understanding the media flow within the pipeline, enabling timely adjustments to fluid parameters and preventing excessive impact on the entire system. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the counting alarm component and the contact monitoring component of the present invention; Figure 3 This is a schematic diagram of the adjusting rod structure and the sliding rod of the present invention; Figure 4 This is a schematic diagram of the end structure of the slide bar of the present invention; Figure 5 This is a schematic diagram of the compression contact structure and the elongation contact of the present invention; Figure 6 This is a schematic diagram of the insulating sliding sleeve structure and notch of the present invention.

[0019] In the diagram: 1. Fastening bolt; 2. Fastening nut; 3. Fixing clip; 4. Adjusting nut; 5. Washer; 6. Spring; 7. Compression contact; 8. Insulating sleeve; 9. Slide rod; 10. Moving contact; 11. Insulating sleeve; 12. Extension contact; 13. Adjusting rod; 14. Battery pack; 15. Counter; 16. Wire; 17. Fixing bolt; 18. Fixing nut; 19. Slide rod; 20. Expansion joint; 21. Audible and visual alarm device; 22. Mounting base; 23. Mounting slot; 24. Connecting main rod; 25. Fixing plate; 26. Linkage plate; 27. Opening slot; 28. Notch; 29. ​​Thread. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figures 1-6 As shown, the present invention provides a technical solution: a bellows life monitoring and alarm device, comprising: Two sets of fixed cards 3; Two sets of fastening bolts 1 are threadedly connected to two sets of fixing clips 3 respectively. A sliding rod 9 is fixed to the inner side of one set of fixing clips 3, and a linkage plate 26 is fixed to the inner side of the other set of fixing clips 3. A sliding rod 19 is fixed to the bottom of the linkage plate 26, and a fixing plate 25 is fixed to the bottom of the sliding rod 9. Two sets of expansion joints 20 are movably installed in two sets of fixing clips 3 respectively. A connecting main rod 24 is fixed between the two sets of expansion joints 20. A mounting base 22 is fixed to the bottom of the connecting main rod 24. A counting alarm component is provided on the mounting base 22; The slide bar 9 is equipped with a contact monitoring component. Through the unique contact monitoring component and the counting alarm component, it can accurately record the effective compensation times of the bellows in real time. Compared with the traditional periodic non-destructive testing method, it can obtain the life status information of the bellows in a timely manner and provide reliable data for life management.

[0022] according to Figure 1 and Figure 3 As shown, the outer walls of the two sets of fastening nuts 2 are threadedly connected to the outer walls of the fixing clips 3. The ends of the two sets of fastening bolts 1 extend into the fixing clips 3 and fit against the outer side of the expansion joint 20. The entire device is fixed to the flanges at both ends of the expansion joint 20 by the two sets of fixing clips 3, ensuring that the device is stably connected to the bellows. When the bellows expands or contracts, the device can synchronously sense its displacement change.

[0023] according to Figure 1 and Figure 3 As shown, one end of the slide rod 19 is provided with an opening slot 27, the bottom of the fixed plate 25 is fixedly connected with an integrated adjusting rod 13, the top of the slide rod 19 is threadedly connected with a fixing bolt 17, and the outer wall of the fixing bolt 17 is threadedly connected with a fixing nut 18. The adjusting rod 13 is slidably connected between the top and bottom inner walls of the opening slot 27. The bottom end of the fixing bolt 17 extends into the opening slot 27. The entire device can be adjusted in length using the adjusting rod 13 and the sliding rod 19 to accommodate bellows of different lengths. After the length is adjusted appropriately, it is fixed using the fixing bolt 17 and the fixing nut 18, while ensuring that the insulating sliding sleeve 8 is located in the center position of the sliding rod 9. This ensures that the device can work stably under different working conditions, accurately monitor the expansion and contraction of the bellows, and adapt to bellows of different lengths, thus having a wide range of applications. Simultaneously, the spring effectively protects the contacts, improving the reliability and service life of the device.

[0024] according to Figure 1 , Figure 2 and Figure 4 As shown, adjusting nuts 4 are threadedly connected to both ends of the outer wall of the slide rod 9. A washer 5 is slidably sleeved on the end of the outer wall of the slide rod 9 that is in contact with the adjusting nut 4. An insulating sleeve 8 is slidably sleeved on the outer wall of the slide rod 9. A spring 6 is sleeved between the washer 5 and the insulating sleeve 8 on the outer wall of the slide rod 9. The outer wall of the slide rod 9 is provided with threads 29 near both ends. The adjusting nut 4 is threaded to the outer wall of the slide rod 9 through the threads 29. By adjusting the adjusting nuts 4 installed at both ends of the slide rod 9, the spring 6 and the insulating sleeve 8 can be moved on the slide rod 9, thereby adjusting the distance between the moving contact 10 and the compression contact 7 and the extension contact 12. This distance corresponds to the effective compensation amount of the bellows. Based on the effective compensation amount of the bellows, the adjusting nuts 4 at both ends of the slide rod 9 drive the spring 6 and the insulating sleeve 8 to move on the slide rod 9, thereby adjusting the distance between the moving contact 10 and the compression contact 7 and the extension contact 12 to be equal to the effective compensation amount of the bellows. At the same time, according to the upper limit of the effective compensation times of the bellows, an alarm value is preset on the counter 15. After the bellows is put into use, with the thermal expansion and contraction of the pipeline or mechanical displacement, the bellows will expand and contract, causing the moving contact 10 to move on the slide rod 9. When the expansion or contraction of the bellows reaches or exceeds the effective compensation amount, the moving contact 10 contacts the compression contact 7 or the extension contact 12, connecting the circuit consisting of the battery pack 14, the wire 16, and the counter 15. The counter 15 records one effective compensation count. At the instant the moving contact 10 contacts the contact point, the spring 6 acts as a buffer to protect the contact point from damage.

[0025] according to Figure 1 As shown, the outer wall of the slide bar 9 is marked with length markings between the two sets of insulating slide sleeves 8.

[0026] according to Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, the contact monitoring assembly includes a compression contact 7, a moving contact 10, an insulating sleeve 11, an elongation contact 12, and a notch 28. The top of one set of insulating sleeves 8 is fixedly connected to the compression contact 7, and the top of the other set of insulating sleeves 8 is fixedly connected to the elongation contact 12. The outer wall of the slide rod 9 is fitted with an insulating sleeve 11 near the middle position. The moving contact 10 is slidably installed on the top of the slide rod 9. The top of the insulating sleeve 11 has a notch 28. The movable contact 10 is slidably connected between the inner walls of both sides of the notch 28. The bottom of the insulating sleeve 11 is fixedly connected to the top of the fixed plate 25. When the bellows undergoes elongation or compression deformation, the movable contact 10 will move back and forth on the slide rod 9, that is, slide between the inner walls of both sides of the notch 28 on the insulating sleeve 11. Once the expansion or contraction of the bellows reaches or exceeds the effective compensation amount, the movable contact 10 will contact the compression contact 7 or the elongation contact 12. In addition, the spring 6 plays a buffering role when the movable contact 10 contacts the compression contact 7 and the elongation contact 12, preventing the contacts from being damaged due to instantaneous collision and extending the service life of the device.

[0027] according to Figure 1 and Figure 2 As shown, the side of the mounting base 22 is provided with two sets of mounting slots 23; The two sets of mounting slots 23 are arranged vertically.

[0028] according to Figure 1 and Figure 2 As shown, the counting alarm assembly includes a battery pack 14, a counter 15, and an audible and visual alarm device 21. The counter 15 is fixedly installed in a set of mounting slots 23 at the top, and the audible and visual alarm device 21 is fixedly connected to the end of the counter 15. The battery pack 14 is fixedly installed in a set of mounting slots 23 at the bottom. The battery pack 14 is electrically connected to the counter 15 and the audible and visual alarm device 21. When the moving contact 10 contacts the compression contact 7 or the extension contact 12, the circuit consisting of the battery pack 14, the wire 16, and the counter 15 is connected. Each time the power is connected, the counter 15 records one, thereby accurately counting the number of effective compensations of the bellows. At the same time, the device can preset an alarm value according to the upper limit of the effective compensation count of different bellows. When the effective compensation count of the bellows reaches the warning value, the audible and visual alarm device 21 issues an audible and visual alarm. According to the alarm prompt, the staff can promptly inspect, maintain, or replace the bellows to avoid damage caused by the bellows exceeding the upper limit of the effective compensation count. The counter 15 continuously records the number of effective compensations. When the preset warning value is reached, the device issues an alarm to remind the staff to promptly inspect and evaluate the bellows. The staff can maintain, replace, or take other corresponding measures according to the actual situation to ensure the safe operation of the pipeline system.

[0029] according to Figure 1 and Figure 2 As shown, the compression contact 7 and the extension contact 12 are electrically connected by a wire 16; the wire 16 is electrically connected to the battery pack 14, the counter 15 and the audible and visual alarm device 21 respectively.

[0030] The overall mechanism achieves the following effect: The entire device is fixed to the flanges at both ends of the expansion joint 20 using two sets of fixing clips 3, ensuring a stable connection between the device and the bellows. When the bellows expands or contracts, the device can synchronously sense its displacement changes. The entire device can be adjusted in length using adjusting rod 13 and sliding rod 19 to accommodate bellows of different lengths. After the length is adjusted appropriately, it is fixed using fixing bolts 17 and fixing nuts 18, while ensuring that the insulating sliding sleeve 8 is located at the center of the sliding rod 9. This ensures stable operation of the device under different working conditions and accurate monitoring of the bellows' expansion and contraction. The slide rod 9 is marked with a length indicator. By adjusting the adjusting nuts 4 installed at both ends of the slide rod 9, the spring 6 and the insulating sleeve 8 can be moved on the slide rod 9, thereby adjusting the distance between the moving contact 10 and the compression contact 7 and the extension contact 12. This distance corresponds to the effective compensation amount of the bellows. When the bellows undergoes elongation or compression deformation, the moving contact 10 will move back and forth on the slide rod 9, that is, slide between the inner walls on both sides of the notch 28 on the insulating sleeve 11. Once the expansion or contraction of the bellows reaches or exceeds the effective compensation amount, the moving contact 10 will contact the compression contact 7 or the extension contact 12. In addition, the spring 6 plays a buffering role when the moving contact 10 contacts the compression contact 7 and the extension contact 12, preventing the contacts from being damaged due to instantaneous collision and extending the service life of the device. When the moving contact 10 contacts the compression contact 7 or the extension contact 12, the circuit consisting of the battery pack 14, the wire 16 and the counter 15 is connected. Each time the power is connected, the counter 15 records once, thereby accurately counting the number of effective compensations of the bellows. At the same time, the device can preset an alarm value according to the upper limit of the effective compensation of different bellows. When the effective compensation of the bellows reaches the warning value, the audible and visual alarm device 21 will issue an audible and visual alarm. According to the alarm prompt, the staff can promptly check, maintain or replace the bellows to avoid damage due to the bellows exceeding the upper limit of the effective compensation. Parameter settings: Based on the effective compensation amount of the bellows, the spring 6 and the insulating sleeve 8 are moved on the slide rod 9 by the adjusting nuts 4 at both ends of the slide rod 9, thereby adjusting the distance between the moving contact 10 and the compression contact 7 and the extension contact 12 so that it is equal to the effective compensation amount of the bellows. At the same time, according to the upper limit of the effective compensation times of the bellows, the alarm value is preset on the counter 15. Operational Monitoring: After the bellows is put into use, due to thermal expansion and contraction or mechanical displacement of the pipeline, the bellows undergoes expansion and contraction deformation, causing the movable contact 10 to move on the slide rod 9. When the expansion and contraction of the bellows reaches or exceeds the effective compensation amount, the movable contact 10 contacts the compression contact 7 or the extension contact 12, connecting the circuit composed of the battery pack 14, the wire 16, and the counter 15. The counter 15 records one effective compensation count. At the moment of contact between the movable contact 10 and the contact point, the spring 6 acts as a buffer to protect the contact from damage. Early warning processing: Counter 15 continuously records the number of valid compensations. When the preset early warning value is reached, the device issues an alarm to remind staff to inspect and evaluate the corrugated pipe in a timely manner. Staff can maintain, replace, or take other corresponding measures according to the actual situation to ensure the safe operation of the pipeline system.

[0031] 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 bellows life monitoring and alarm device, comprising: Two sets of fixed cards (3); Two sets of fastening bolts (1) are threaded onto two sets of fixing clips (3), characterized in that: a sliding rod (9) is fixedly connected to the inner side of one set of fixing clips (3), and a linkage plate (26) is fixedly connected to the inner side of the other set of fixing clips (3), a sliding rod (19) is fixedly connected to the bottom of the linkage plate (26), and a fixing plate (25) is fixedly connected to the bottom of the sliding rod (9). Two sets of expansion joints (20) are movably installed in two sets of fixing clips (3), and a connecting main rod (24) is fixed between the two sets of expansion joints (20). A mounting base (22) is fixed at the bottom of the connecting main rod (24). A counting alarm component is provided on the mounting base (22); The slide bar (9) is equipped with a contact monitoring component.

2. The bellows life monitoring and alarm device according to claim 1, characterized in that: The outer walls of the two sets of fastening nuts (2) are threadedly connected to the outer walls of the fixing clips (3), and the ends of the two sets of fastening bolts (1) extend into the fixing clips (3) and fit against the outer side of the expansion joint (20).

3. The bellows life monitoring and alarm device according to claim 1, characterized in that: One end of the slide rod (19) is provided with an opening groove (27), the bottom of the fixed plate (25) is fixedly connected with an integrated adjusting rod (13), the top of the slide rod (19) is threadedly connected with a fixing bolt (17), and the outer wall of the fixing bolt (17) is threadedly connected with a fixing nut (18). The adjusting rod (13) is slidably connected between the top inner wall and the bottom inner wall of the opening groove (27), and the bottom end of the fixing bolt (17) extends into the opening groove (27).

4. The bellows life monitoring and alarm device according to claim 1, characterized in that: The outer wall of the slide rod (9) is threaded with adjusting nuts (4) near both ends. A washer (5) is slidably sleeved on the outer wall of the slide rod (9) at the end that fits the adjusting nut (4). An insulating sleeve (8) is slidably sleeved on the outer wall of the slide rod (9). A spring (6) is sleeved between the washer (5) and the insulating sleeve (8) on the outer wall of the slide rod (9). The outer wall of the slide rod (9) is provided with threads (29) near both ends, and the adjusting nut (4) is threaded to the outer wall of the slide rod (9) through the threads (29).

5. The bellows life monitoring and alarm device according to claim 4, characterized in that: The outer wall of the slide bar (9) is marked with a length mark between the two sets of insulating slide sleeves (8).

6. The bellows life monitoring and alarm device according to claim 5, characterized in that: The contact monitoring assembly includes a compression contact (7), a moving contact (10), an insulating sleeve (11), an elongation contact (12), and a notch (28). The top of one set of insulating sleeves (8) is fixedly connected to the compression contact (7), and the top of another set of insulating sleeves (8) is fixedly connected to the elongation contact (12). The outer wall of the slide rod (9) is fitted with an insulating sleeve (11) near the middle position. The top of the slide rod (9) is slidably installed with the moving contact (10). The top of the insulating sleeve (11) has a notch (28). The movable contact (10) is slidably connected between the inner walls on both sides of the notch (28), and the bottom of the insulating sleeve (11) is fixedly connected to the top of the fixed plate (25).

7. The bellows life monitoring and alarm device according to claim 1, characterized in that: The mounting base (22) has two sets of mounting slots (23) on its side; The two sets of mounting slots (23) are arranged vertically.

8. The bellows life monitoring and alarm device according to claim 7, characterized in that: The counting alarm assembly includes a battery pack (14), a counter (15) and an audible and visual alarm device (21). The counter (15) is fixedly installed in a set of mounting slots (23) above, and the audible and visual alarm device (21) is fixedly connected to the end of the counter (15). The battery pack (14) is fixedly installed in a set of mounting slots (23) below. The battery pack (14) is electrically connected to the counter (15) and the audible and visual alarm device (21).

9. The bellows life monitoring and alarm device according to claim 6, characterized in that: The compression contact (7) and the extension contact (12) are electrically connected by a wire (16); the wire (16) is electrically connected to the battery pack (14), the counter (15) and the audible and visual alarm device (21) respectively.

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