Anti-condensation pipeline expansion joint displacement monitoring device

Abstract

The utility model discloses an anti-condensation pipeline expansion joint displacement monitoring device, which relates to the technical field of intelligent industrial pipelines and comprises an expansion joint body, a laser sensor body and an electric heating unit, the laser sensor body is arranged at one end of the expansion joint body, and a reflecting plate is arranged at the other end of the expansion joint body. The electric heating unit comprises an electric heating wire, and a circle of electric heating wire is arranged on a lens of the laser sensor body; the operation condition of the expansion joint body is monitored in real time through the laser sensor body, and when water mist or rainwater exists on a lens of the laser sensor body, the temperature of the lens of the laser sensor body is increased through heating of the electric heating wire; water mist or rainwater on the lens is evaporated through temperature rise of the lens of the laser sensor body, so that the laser sensor body can stably monitor the expansion joint body.

Description

Technical Field

[0001] The utility model relates to the technical field of intelligent industrial pipelines, and particularly relates to a displacement monitoring device for an anti-condensation pipeline expansion joint. Background Art

[0002] As is well known, in the water conservancy and hydropower industries, expansion joints are mainly used to compensate for pipeline displacement changes caused by temperature changes, geological condition changes, pressure changes, etc., and to avoid pipeline system failures caused thereby. Therefore, the displacement monitoring of expansion joints has always been a state monitoring index that the hydropower industry pays great attention to, and it is of great significance for real-time understanding and judgment of the operation of the on-site pipeline system.

[0003] In the water conservancy and hydropower industries, metal expansion joints are mostly used in buried pipe systems, which are not convenient for on-site manual repeated inspections. When the traditional laser displacement sensor is used to monitor the displacement change of the expansion joint, the laser sensor is fixed on the surface of the expansion joint of the underground penstock pipeline through a mounting bracket, so that the laser sensor can master and judge the operation of the on-site pipeline system in real time.

[0004] For example, in the patent with the publication number CN221054537U, the publication date of October 25, 2023, and the name "An online monitoring displacement expansion joint applied to low-temperature occasions", this patent discloses an online monitoring displacement expansion joint applied to low-temperature occasions, which relates to the technical field of intelligent industrial pipelines, and includes a first connecting pipe, a first bellows, an intermediate connecting pipe, a second bellows, and a second connecting pipe connected in sequence. A displacement sensor is arranged on the intermediate connecting pipe, and a first PTC heating core is arranged inside the displacement sensor. The first PTC heating core realizes low-temperature heating through a low-temperature feedback control module; through the displacement sensor, with the ground as the reference plane, the lateral movement of the first bellows and the second bellows can be detected (△x = x1 - x0). When the external temperature is relatively low, when the low-temperature feedback control module detects that the external temperature is relatively low, the first PTC heating core is used to heat the displacement sensor, and the power of the first PTC heating core is adjusted in real time to ensure that the sensor chip works normally above 0°C.

[0005] In the prior art, when the laser sensor monitors the pipeline system, in rainy or snowy weather, when the cold outside air encounters the glass mirror surface of the cold laser sensor, rain fog or raindrops will condense on the glass surface of the laser sensor. As a result, when the laser signal encounters raindrops or water mist, reflection or scattering effects will occur, resulting in a sharp drop in the signal intensity, which may cause false alarms of the laser displacement sensor, thereby causing measurement errors of the laser displacement sensor for the pipeline system. Content of the Utility Model

[0006] The purpose of the utility model is to provide a displacement monitoring device for an anti-condensation pipeline expansion joint to solve the above problems in the prior art.

[0007] To achieve the above object, the utility model provides the following technical solution: a displacement monitoring device for an anti-condensation pipeline expansion joint, comprising an expansion joint body and a laser sensor body. A laser sensor body is provided at one end of the expansion joint body, and a reflector is provided at the other end of the expansion joint body. An electric heating unit is further included, and the electric heating unit includes an electric heating wire. An electric heating wire is arranged in a circle on the lens of the laser sensor body.

[0008] In the above, the expansion joint body includes an intermediate connecting pipe, and a first corrugated pipe and a second corrugated pipe are respectively connected to both ends of the intermediate connecting pipe.

[0009] In the above, the expansion joint body further includes a first connecting pipe and a second connecting pipe. A first connecting pipe is connected to the end of the first corrugated pipe, and a second connecting pipe is connected to the end of the second corrugated pipe.

[0010] In the above, the first connecting pipe is provided with a laser sensor body, and a solar cell module is electrically connected to the laser sensor body. The solar cell module provides electric energy for the laser sensor body.

[0011] In the above, a wiper system is provided on the laser sensor body. The wiper system includes a first driving member. A first driving member is provided on the laser sensor body, and a wiper is connected to the output end of the first driving member.

[0012] In the above, the first driving member is electrically connected to the solar cell module.

[0013] In the above, a reflector is provided on the second connecting pipe, and a cleaning unit is provided on the reflector. The cleaning unit includes a second driving member. A second driving member is provided on the reflector, and a cleaning plate is installed at the output end of the second driving member.

[0014] In the above, the second driving member is electrically connected to the solar cell module.

[0015] In the above, a cushion block for supporting the cleaning plate is provided on the second connecting pipe.

[0016] In the above, both the cleaning plate and the wiper are made of rubber material.

[0017] The beneficial effect of the utility model lies in that: the operation condition of the expansion joint body is monitored in real time through the laser sensor body. When there is water mist or rain on the lens of the laser sensor body, the temperature of the lens of the laser sensor body is increased by heating with the electric heating wire, and the water mist or rain on the lens is evaporated by the increase of the temperature of the lens of the laser sensor body, so that the laser sensor body can perform stable monitoring operations on the expansion joint body. Brief Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the present utility model;

[0020] Figure 2 It is a planar structural schematic diagram of the present utility model;

[0021] Figure 3 It is a partial structural schematic diagram of the laser sensor body of the present utility model from the first perspective;

[0022] Figure 4 It is a partial structural schematic diagram of the laser sensor body of the present utility model from the second perspective;

[0023] Figure 5 It is a structural schematic diagram of the temperature acquisition module of the present utility model;

[0024] Figure 6 It is a structural schematic diagram of another embodiment provided by the present utility model;

[0025] Figure 7 It is a partial cross-sectional structural schematic diagram of the windshield wiper of the present utility model;

[0026] Figure 8 It is a partial cross-sectional structural schematic diagram of the cleaning plate of the present utility model.

[0027] Explanation of Reference Numerals:

[0028] 1. Expansion joint body; 2. Laser sensor body; 3. Reflector; 4. Electric heating wire; 5. Intermediate pipe; 6. First bellows; 7. Second bellows; 8. First pipe; 9. Second pipe; 10. Temperature acquisition module; 11. First controller; 12. Solar cell module; 13. First driving member; 14. Windshield wiper; 15. Second controller; 16. Rainfall acquisition module; 17. Second driving member; 18. Cleaning plate; 19. Spacer block; 20. Groove; 21. Sponge plate; 22. Elastic member; 23. Rubber soft rod. Detailed Embodiments

[0029] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the following will further introduce the present utility model in detail in conjunction with the drawings.

[0030] Such as Figures 1 to 8As shown in the figure, a displacement monitoring device for an anti-condensation pipeline expansion joint provided by an embodiment of the present utility model includes an expansion joint body 1 and a laser sensor body 2. A laser sensor body 2 is provided at one end of the expansion joint body 1, and a reflector 3 is provided at the other end of the expansion joint body 1. It further includes an electric heating unit, and the electric heating unit includes an electric heating wire 4. An electric heating wire 4 is arranged in a circle on the lens of the laser sensor body 2.

[0031] Specifically, the laser sensor body 2 is a sensor that uses laser technology for measurement. The laser sensor body 2 can accurately measure the position and displacement changes of the object to be measured in a non-contact manner, and can measure precise geometric measurements such as displacement, thickness, vibration, distance, diameter, etc. The expansion joint body 1 includes an intermediate pipe 5. The two ends of the intermediate pipe 5 are respectively connected to a first bellows 6 and a second bellows 7. The end of the first bellows 6 is connected to a first pipe 8, and the end of the second bellows 7 is connected to a second pipe 9. The expansion joint body 1 is formed by connecting the first pipe 8, the first bellows 6, the intermediate pipe 5, the second bellows 7, and the second pipe 9 in sequence. The laser sensor body 2 is arranged on the first pipe 8, and the reflector 3 is arranged on the second pipe 9. The laser sensor body 2 emits visible red laser light towards the surface of the object to be measured (i.e., the reflector 3) through the lens. The laser light scattered by the surface of the object (i.e., the reflector 3) passes through the receiver lens and is received by the internal CCD linear camera. According to different distances, the CCD linear camera can "see" this light spot at different angles. Based on this angle and the known distance between the laser and the camera, the digital signal processor can calculate the distance between the sensor and the object to be measured. This is common knowledge in the art and will not be elaborated. The use condition of the expansion joint body 1 is monitored in real time through the laser sensor body 2. When it is rainy or snowy outside and there is water mist or rain on the lens of the laser sensor body 2, the electric heating wire 4 is powered on. The temperature of the lens of the laser sensor body 2 is increased by heating the electric heating wire 4. The water mist or rain on the lens is evaporated by the increase in the temperature of the lens of the laser sensor body 2, so that the laser sensor body 2 can perform stable monitoring operations on the expansion joint body 1. In this embodiment, an electric heating wire 4 is arranged on the laser sensor body 2, and the heating of the mirror surface of the laser sensor body 2 is realized through the temperature feedback control module. When the temperature acquisition module acquires that the temperature of the glass mirror surface is lower than the water vapor dew point temperature, the heating module is started by the controller to heat the glass mirror surface, and the power of the electric heating wire 4 is adjusted in real time through the temperature feedback to ensure that the temperature of the sensor glass mirror surface is higher than the water vapor dew point temperature;

[0032] The method for monitoring using the laser sensor body 2 includes the following steps:

[0033] Set the target temperature as T1, and compare T1 with the measured temperature T0 of the mirror surface of the laser sensor body 2:

[0034] When T1 < T0, the heating wire 4 does not need to work;

[0035] (2) When T1 > T0, the temperature acquisition module 10 acquires the temperature of the mirror surface of the laser sensor body 2, and then the first controller 11 controls the temperature of the heating wire 4, so that the heating wire 4 adjusts and heats the mirror surface of the laser sensor body 2 to ensure that the temperature of the mirror surface of the laser sensor body 2 is higher than the water vapor dew point temperature. This can ensure that the heating wire 4 can clean the water mist on the mirror surface of the laser sensor body 2 in time.

[0036] In the prior art, when the laser sensor body 2 monitors the pipeline system, in rainy or snowy weather, when the cold outside air encounters the cold glass mirror surface of the laser sensor body 2, rain fog or raindrops will condense on the glass surface of the laser sensor body 2. As a result, when the laser signal encounters raindrops or water mist, reflection or scattering effects will occur, resulting in a sharp drop in the signal intensity, which may cause false alarms of the laser sensor body 2, thereby leading to measurement errors of the laser sensor body 2 for the pipeline system.

[0037] The beneficial effect of this embodiment is that the operation of the expansion joint body 1 is monitored in real time through the laser sensor body 2. When there is water mist or rain on the lens of the laser sensor body 2, the temperature of the lens of the laser sensor body 2 is increased by heating the heating wire 4, and the water mist or rain on the lens is evaporated through the increase in the temperature of the lens of the laser sensor body 2, so that the laser sensor body 2 can perform stable monitoring operations on the expansion joint body 1.

[0038] Further, the laser sensor body 2 is provided on the first connecting pipe 8, and the laser sensor body 2 is electrically connected to a solar cell module 12, and the solar cell module 12 provides electric energy for the laser sensor body 2.

[0039] Specifically, the solar cell module 12 provides electric energy for the laser sensor body 2, so that the laser sensor body 2 can always monitor the expansion joint body 1 in real time. The solar cell module 12 is a power supply system that converts light energy into electric energy, and has high photoelectric conversion efficiency and high reliability. This is common knowledge in this field and will not be elaborated.

[0040] In another embodiment provided by the present invention, a wiper system is provided on the laser sensor body 2. The wiper system includes a first driving member 13. The first driving member 13 is provided on the laser sensor body 2, and the output end of the first driving member 13 is connected to a wiper 14; the first driving member 13 is electrically connected to the solar cell module 12.

[0041] Specifically, a second controller 15 and a rain collection module 16 are connected to the windshield wiper system. When the rain collection module 16 detects raindrops or water mist on the mirror surface of the laser sensor body 2, the first driving member 13 (the first driving member 13 is a device whose output end can perform forward and reverse movements, preferably a motor) is started through the second controller 15 to drive the windshield wiper 14 (the windshield wiper 14 is made of rubber material, making the windshield wiper 14 flexible) to rotate. Electric energy is provided for the first driving member 13 by the solar cell module 12 (it is common knowledge in the art that the solar cell module 12 provides electric energy for the motor so that the first driving member 13 can rotate, which will not be elaborated here). Thus, the windshield wiper 14 can wipe off the rain mist or water droplets on the mirror surface of the laser sensor body 2. Since the windshield wiper 14 is made of flexible material, when the windshield wiper 14 cleans the mirror surface of the laser sensor body 2, it will not damage the mirror surface of the laser sensor body 2. The power of the windshield wiper system is adjusted in real time through the rain collection module 16 to ensure that there will be no water mist or raindrops on the mirror surface of the laser sensor body 2.

[0042] The method for the laser sensor body 2 to monitor rainfall includes the following steps:

[0043] Set the target rainfall as Y1, and compare Y1 with the rainfall Y0 measured on the mirror surface of the laser sensor body 2.

[0044] (1) When Y1 < Y0, the windshield wiper system does not need to work;

[0045] (2) When Y1 > Y0, the difference between the target rainfall Y1 and the rainfall Y0 measured on the mirror surface of the laser sensor body 2 is transmitted to the controller module, and then the windshield wiper system is adjusted through the second controller 15 to ensure that there will be no water mist or raindrops on the sensor glass; the water mist on the mirror surface of the laser sensor body 2 can be cleared in time by the windshield wiper 14, improving the monitoring accuracy of the laser sensor body 2.

[0046] In another embodiment provided by the present utility model, a reflector 3 is provided on the second connecting pipe 9, and a cleaning unit is provided on the reflector 3. The cleaning unit includes a second driving member 17. The second driving member 17 is provided on the reflector 3, and a cleaning plate 18 is installed at the output end of the second driving member 17; the second driving member 17 is electrically connected to the solar cell module 12; a cushion block 19 for supporting the cleaning plate 18 is provided on the second connecting pipe 9.

[0047] Specifically, the cleaning plate 18 is horizontally arranged. When the cleaning plate 18 has not rotated, the cushion block 19 supports the cleaning plate 18 to prevent the cleaning plate 18 from tightly pressing against the outer wall of the second connecting pipe 9 without power. The reflecting plate 3 is the object to be measured by the laser sensor body 2. The working principle of the laser sensor body 2 is based on the laser triangulation method, which requires a complete triangular optical path for accurate measurement. If the surface of the reflecting plate 3 is covered by water mist, it may block or interfere with the laser optical path, resulting in the sensor being unable to correctly receive the reflected light, thereby affecting the accuracy and stability of the measurement. In addition, the water mist may also change the refractive index of the laser, further affecting the measurement accuracy. Therefore, when using the laser sensor body 2 for measurement, it should be ensured that the surface of the reflecting plate 3 is dry to avoid interference from water mist or other liquid substances to ensure the accuracy and reliability of the measurement. So, it is necessary to ensure the cleanliness of the surface of the reflecting plate 3. When there is water mist on the surface of the reflecting plate 3, the second driving member 17 (the second driving member 17 is a device whose output end can perform forward and reverse movements, preferably a motor) is started to drive the cleaning plate 18 (the cleaning plate 18 is made of rubber material and has a certain softness, so that when the cleaning plate 18 wipes the surface of the reflecting plate 3, it will not damage the surface of the reflecting plate 3) to rotate reciprocally (the solar cell module 12 provides electrical energy for the motor, enabling the second driving member 17 to rotate reciprocally, which is common knowledge in this field and will not be elaborated), so that the cleaning plate 18 can wipe the water mist on the surface of the reflecting plate 3, and the water mist on the surface of the reflecting plate 3 will not affect the monitoring of the laser sensor body 2.

[0048] In another embodiment provided by the present utility model, the cleaning plate 18 and the windshield wiper 14 are both provided with grooves 20. A sponge plate 21 is slidably installed in each of the grooves 20 of the cleaning plate 18 and the windshield wiper 14. Each of the sponge plates 21 is connected to the inner wall of its corresponding groove 20 by a plurality of uniformly arranged elastic members 22. A plurality of rubber soft rods 23 are uniformly arranged on each of the sponge plates 21.

[0049] Specifically, when the windshield wiper 14 cleans the mirror surface of the laser sensor body 2 and the cleaning plate 18 cleans the water mist on the surface of the reflector 3, the sponge plate 21 is driven to rotate by the cleaning plate 18 and the windshield wiper 14, and the sponge plate 21 drives the rubber soft rod 23 to rotate, so that the sponge plate 21 can absorb the water droplets on the mirror surface of the laser sensor body 2 and the surface of the reflector 3, and the rubber soft rod 23 can clean the mirror surface of the laser sensor body 2 and the surface of the reflector 3, improving the cleaning efficiency of the mirror surface of the laser sensor body 2 and the surface of the reflector 3. Moreover, due to the elastic force of the elastic member 22 (the elastic member 22 is a component capable of telescopic reset, preferably a spring), the elastic member 22 can provide elastic telescoping for the sponge plate 21, making the sponge plate 21 and the rubber soft rod 23 more tightly pressed against the mirror surface of the laser sensor body 2 and the surface of the reflector 3, improving the cleaning quality of the sponge plate 21 and the rubber soft rod 23 on the mirror surface of the laser sensor body 2 and the surface of the reflector 3.

[0050] Only some exemplary embodiments of the present invention have been described above by way of illustration. Without doubt, for those of ordinary skill in the art, various different ways can be used to modify the described embodiments without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present invention.

Claims

1. A displacement monitoring device for an anti-condensation pipeline expansion joint, comprising an expansion joint body and a laser sensor body. The laser sensor body is arranged at one end of the expansion joint body, and a reflector is arranged at the other end of the expansion joint body. It is characterized in that, It further includes an electrothermal unit, and the electrothermal unit includes a heating wire, and a circle of heating wire is arranged on the lens of the laser sensor body.

2. The displacement monitoring device for the anti-condensation pipeline expansion joint according to claim 1, characterized in that, The expansion joint body includes an intermediate pipe, and a first bellows and a second bellows are respectively connected to both ends of the intermediate pipe.

3. The displacement monitoring device for the anti-condensation pipeline expansion joint according to claim 2, characterized in that, The expansion joint body further includes a first pipe and a second pipe. The end of the first bellows is connected to the first pipe, and the end of the second bellows is connected to the second pipe.

4. The displacement monitoring device for the anti-condensation pipeline expansion joint according to claim 3, characterized in that, A laser sensor body is arranged on the first pipe, and a solar cell module is electrically connected to the laser sensor body, and the solar cell module supplies electric energy to the laser sensor body.

5. A displacement monitoring device for an anti-condensation pipeline expansion joint according to claim 3, characterized in that, A wiper system is arranged on the laser sensor body. The wiper system includes a first driving member. The first driving member is arranged on the laser sensor body, and the output end of the first driving member is connected to a wiper.

6. The displacement monitoring device for the anti-condensation pipeline expansion joint according to claim 5, characterized in that, The first driving member is electrically connected to the solar cell module.

7. The displacement monitoring device for the anti-condensation pipeline expansion joint according to claim 6, characterized in that, A reflector is arranged on the second pipe, and a cleaning unit is arranged on the reflector. The cleaning unit includes a second driving member. The second driving member is arranged on the reflector, and a cleaning plate is installed at the output end of the second driving member.

8. The displacement monitoring device for the anti-condensation pipeline expansion joint according to claim 7, characterized in that The second driving member is electrically connected to the solar cell module.

9. The displacement monitoring device for the anti-condensation pipeline expansion joint according to claim 7, characterized in that, A cushion block for supporting the cleaning plate is arranged on the second pipe.

10. A displacement monitoring device for an anti-condensation pipeline expansion joint according to claim 9, characterized in that, Both the cleaning plate and the wiper are made of rubber material.

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