Pipeline Leak Detection Device

Abstract

The present invention discloses a pipeline water leakage detection device. After the sensor converts the vibration signal into an electrical signal, it wirelessly transmits it to the working base station. The pipeline water leakage detection device includes a hoop structure for clamping the detection device body on the water pipe. It also includes a vertical probe rod with the bottom end tightly abutted against the water pipe, and the top end of the vertical probe rod is tightly abutted against the bottom plate of a vibration sound chamber. The sensor includes a sound sensor installed on the top plate of the vibration sound chamber. The sensor also includes a displacement sensor. The vertical probe rod is also fixed to one end of at least one horizontal probe rod, and the other end of the horizontal probe rod is tightly abutted against a displacement sensor. There are two symmetrically arranged horizontal probe rods, and two symmetrically arranged displacement sensors. One end of the horizontal probe rod has a metal contact plate that abuts against the spherical end face of the displacement sensor. The water leakage detection of this pipeline detection device has high accuracy, and the connection between the device and the water pipe is firm and reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline leakage detection based on the Internet of Things, and specifically relates to a pipeline leakage detection device. Background Art

[0002] With the widespread application and promotion of Internet of Things technology, there are more and more types of systems for remotely monitoring the leakage of regional water pipe networks, with different structures and each having its own advantages. For example, in a water pipe leakage remote monitoring system, several pipeline leakage detection devices are installed on the water pipes, one every certain distance. After each pipeline leakage detection device obtains a vibration signal, it converts the vibration signal into an electrical signal and wirelessly sends the electrical signal to a working base station such as a GPRS network transmission main workstation at regular or irregular intervals. This water pipe leakage remote monitoring system eliminates a large number of on-site monitoring staff, saves a large amount of monitoring costs, greatly improves the monitoring efficiency, and makes the leakage detection of regional water pipe networks intelligent.

[0003] However, the above-mentioned pipeline leakage detection devices of the prior art still have the following deficiencies: 1. A piezoelectric sheet or a pressure ceramic sheet is used to obtain the vibration signal. The vibration signal obtained by this piezoelectric sheet contains both axial vibration signals and radial vibration signals, and there may be interference between them, that is, the accuracy of obtaining the vibration signal is insufficient, affecting the accuracy of leakage detection. 2. A magnet is used to adsorb the bottom of the cylindrical pipeline leakage detection device on a magnetically conductive circular water pipe such as a spherical cast iron circular water pipe, and its connection firmness and reliability are both lacking, which not only affects the normal use of the pipeline leakage detection device but also affects the accuracy of leakage detection. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a pipeline leakage detection device with high leakage detection accuracy and a firm and reliable connection between the detection device body and the water pipe.

[0005] The technical solution of the present invention is to provide a pipeline leakage detection device. After the sensor converts the vibration signal into an electrical signal, it wirelessly sends it to the working base station; the pipeline leakage detection device includes a hoop structure that holds the detection device body tightly on the water pipe; it also includes a vertical probe rod with its bottom end pressing against the water pipe, and the top end of the vertical probe rod pressing against the bottom plate of a vibration sound chamber. The sensor includes a sound sensor installed on the top plate of the vibration sound chamber; the sensor also includes a displacement sensor; the vertical probe rod is also fixed to one end of at least one horizontal probe rod, and the other end of the horizontal probe rod presses against a displacement sensor.

[0006] After adopting the above structure, the pipeline leakage detection device of the present invention has the following advantages: Since the vertical probe rod is used to obtain the axial vibration signal through the vibration sound chamber and the sound sensor, and the horizontal probe rod is used to obtain the radial vibration signal through the displacement sensor, there will be no mutual interference between the axial vibration signal and the radial vibration signal, making the obtained vibration signal accurate and greatly improving the accuracy of leakage detection. Using the hoop to hold the water pipe tightly overcomes the defect that it is difficult to firmly fix the flat bottom and the arc-shaped pipe in the prior art, making the connection between the detection device body and the water pipe firm and reliable, which can not only ensure the normal use of the detection device, but also further improve the accuracy of leakage detection.

[0007] Further, the horizontal probe rods are two symmetrically arranged ones, and the displacement sensors are two symmetrically arranged ones. After adopting the above structure, the two horizontal probe rods symmetrically obtain the radial displacement signal, that is, the radial vibration signal, making the obtained radial vibration signal more accurate and further improving the accuracy of leakage detection.

[0008] Further, at one end of each horizontal probe rod away from the vertical probe rod, there is a metal contact plate, and the flat contact surface of the metal contact plate abuts against the spherical end surface of the displacement sensor. After adopting the above structure, the contact area between the horizontal probe rod and the displacement sensor is larger. This structure can not only ensure that when the vertical probe rod axially moves within a certain range, one end of the horizontal probe rod always abuts against the spherical end surface of the displacement sensor, but also has a simple structure and relatively low requirements for the axes of the displacement sensor and the horizontal probe rod to be on the same straight line, making the installation more convenient, the process of obtaining the radial vibration signal more stable and reliable, and further improving the accuracy of the obtained radial vibration signal and the accuracy of leakage detection.

[0009] Further, the vibration sound chamber includes a top plate, a bottom plate and a circular side plate fixed in a cylinder. The circular side plate is fixed and sealed with the top plate and the bottom plate to form a vibration sound chamber with a circular vibration sound cavity, and the sound sensor is fixed at the center of the top plate. After adopting the above structure, the acquisition of the axial vibration signal is more sensitive, and the accuracy of the obtained axial vibration signal is higher, further improving the accuracy of leakage detection.

[0010] Further, the pipeline leakage detection device of the present invention further includes a circular base, and the circular base is fixed at the inner bottom end of a cylinder; the vertical probe rod is slidably fitted in the central hole of the circular base; the displacement sensors are fixed on the top of the circular base through their respective mounting seats; the part of the circular base protruding downward from the bottom end of the cylinder is the hoop mounting part. After adopting the above structure, the installation of the vertical probe rod and the horizontal probe rod is more convenient, the operation is more sensitive, more stable and more reliable, further improving the accuracy of the obtained axial vibration signal and the accuracy of the obtained radial vibration signal, and further improving the accuracy of leakage detection.

[0011] Furthermore, the vertical probe rod is composed of a core rod and a rod sleeve fixedly sleeved outside the core rod. The bottom end of the core rod is a plane that abuts against the top surface of the water pipe; the top end of the rod sleeve is a spherical surface that abuts against the center of the bottom surface of the bottom plate of the vibration sound generating chamber. After adopting the above structure, not only the overall strength of the vertical probe rod is ensured, but also the contact area between the small-diameter core rod and the top surface of the water pipe is more concentrated. Moreover, the best contact area and abutting force between the spherical surface at the top end of the rod sleeve and the center of the bottom surface of the bottom plate of the vibration sound generating chamber are ensured, making the vibration transmission effect of the vertical probe rod better.

[0012] Furthermore, one end of the horizontal probe rod is fixed on the core rod of the vertical probe rod, and vertical long through holes for the horizontal probe rod to move up and down are provided on both sides of the rod sleeve. After adopting the above structure, it is not only convenient for the manufacturing and assembly of the horizontal probe rod and the vertical probe rod, but also enables the vertical probe rod to accurately and quickly transmit the radial displacement vibration signal to the horizontal probe rod, further improving the accuracy of the obtained radial vibration signal and the accuracy of water leakage detection.

[0013] Furthermore, the hoop structure is a clamp made of elastic steel plate. The clamp body is an arc-shaped plate that matches the shape and size of the circular water pipe. One side of the clamp has a first opening for being clamped into the water pipe after the water pipe expands. After the arc-shaped plate is clamped on the water pipe, under the elastic force of the elastic steel plate, it is tightly held on the water pipe. After adopting the above structure, the hoop structure is simple, the clamping with the water pipe is convenient, and the connection between the detection device body and the water pipe is more firm and reliable after the clamp is engaged, further improving the accuracy of the obtained vibration signal and the accuracy of water leakage detection.

[0014] Furthermore, a flexible washer for pressing the water pipe is provided at the inner top end of the clamp. After adopting the above structure, the connection between the detection device body and the water pipe is more firm and reliable, further improving the accuracy of the obtained vibration signal and the accuracy of water leakage detection.

[0015] Furthermore, a guide plate for inserting into the water pipe is provided on the lower side top wall of the first opening of the clamp. After adopting the above structure, the process of inserting the first opening of the hoop into the water pipe is smoother and faster, and the clamping force at the first opening is better. Further improving the firmness and reliability of the connection between the detection device body and the water pipe after the clamp is engaged, and further improving the accuracy of the obtained vibration signal and the accuracy of water leakage detection. Brief Description of the Drawings

[0016] Figure 1 is a three-dimensional structural schematic diagram of the pipeline water leakage detection device of the present invention Figure 1 。

[0017] Figure 2 is a three-dimensional structural schematic diagram of the pipeline water leakage detection device of the present invention Figure 2 。

[0018] Figure 3It is a schematic vertical sectional structure diagram of the pipeline leakage detection device of the present invention.

[0019] Figure 4 It is a schematic exploded structure diagram of some components of the pipeline leakage detection device of the present invention Figure 1 .

[0020] Figure 5 It is a schematic exploded structure diagram of some components of the pipeline leakage detection device of the present invention Figure 2 .

[0021] Figure 6 It is Figure 5 an enlarged upward view structure diagram of the second component from top to bottom in

[0022] As shown in the figure: 1. Antenna, 2. Upper cover shell, 3. Lower cover shell, 4. Clamp, 5. Suspension ring, 6. Circuit board box, 7. Second PCB circuit board, 8. Conducting wire, 9. Circular side plate, 10. Top plate, 11. Sound sensor, 12. Core rod, 13. Guide plate, 14. Rod sleeve, 15. Vertical long through hole, 16. Displacement sensor, 17. Horizontal probe, 18. Bottom plate, 19. Circular vibration sound generating cavity, 20. First PCB circuit board, 21. Small battery, 22. Box cover, 23. Box body, 24. Cylinder for installing large battery, 25. Vertical probe, 26. Cylinder, 27. Arc plate, 28. First opening, 29. Snap ring, 30. Flexible washer, 31. Annular radial groove, 32. Circular base, 33. Mounting seat, 34. Vibration sound generating chamber, 35. Metal contact plate, 36. Pressing handle, 37. Second opening, 38. Round hole, 39. Plane, 40. Central hole, 41. Hoop installation part, 42. Spherical surface, 43. Cylinder cover, 44. Detection device body, 45. Spherical end face. Specific embodiments

[0023] The following further describes the specific embodiments of the present invention with reference to the accompanying drawings. It should be noted here that the description of these specific embodiments is for helping to understand the present invention, but does not constitute a limitation to the present invention. In addition, the technical features involved in the following specific embodiments of the present invention can be combined with each other as long as they do not conflict with each other.

[0024] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 shown.

[0025] The pipeline leakage detection device of the present invention can also be called a noise recorder. In a remote monitoring system for water pipe leakage, several pipeline leakage detection devices, that is, the detection device body 44, are installed on the water pipe, one every certain distance. The sensors in each pipeline leakage detection device, such as the sound sensor 11 and the displacement sensor 16, convert the vibration signal into an electrical signal and then wirelessly send it to the working base station. The pipeline leakage detection device here can be understood as the detection device body 44. It is not difficult to understand that the use of the sound sensor 11, the displacement sensor 16, and the following connection structure is the inventive point of the present invention. However, the sound sensor 11 itself belongs to the prior art, and the sound sensor 11 is a commercially available sound sensor. The displacement sensor 16 itself also belongs to the prior art, and the displacement sensor 16 is a commercially available displacement sensor. Converting the vibration signal or the so-called sound signal into an electrical signal by the sound sensor 11 belongs to the prior art, and converting the vibration signal or the so-called displacement signal into an electrical signal by the displacement sensor 16 also belongs to the prior art. Wirelessly sending the electrical signal to the working base station also belongs to the prior art.

[0026] For example, after the sound sensor 11 obtains the vibration signal or the so-called sound signal, it converts the vibration signal or the so-called sound signal into an analog electrical signal, and periodically or aperiodically converts the analog electrical signal into a digital signal after filtering and amplification, and then sends the digital signal to the working base station; another example is that after the displacement sensor 16 obtains the vibration signal or the so-called displacement signal, it converts the vibration signal or the so-called displacement signal into an analog electrical signal, and periodically or aperiodically converts the analog electrical signal into a digital signal after filtering and amplification, and then sends the digital signal to the working base station.

[0027] The said working base station can be a mobile working base station of a monitoring vehicle or a stationary fixed working base station. The digital signal can be received in real time through a relay box, and after being received by the GPRS receiver of the main workstation through the GPRS network transmission, it is transmitted to the server at any time.

[0028] The pipeline leakage detection device of the present invention further includes a first PCB circuit board 20 electrically connected to a sensor such as the following sound sensor 11 through a wire 8. The first PCB circuit board 20 is located in the following cylinder 26. The pipeline leakage detection device of the present invention further includes a second PCB circuit board 7 electrically connected to a sensor such as the following displacement sensor 16 through a wire 8 and a circuit board box 6 composed of a box cover 22 and a box body 23, or the circuit board box 6 of the second PCB circuit board 7.

[0029] The pipeline leakage detection device of the present invention further includes an antenna 1 for wireless transmission. The pipeline leakage detection device of the present invention may further include a lifting ring 5 provided at the top of the detection device body 44 for lifting.

[0030] The pipeline leakage detection device of the present invention further includes a battery, which can be a large battery and four small batteries 21, all of which can be encapsulated in their respective cylinders. For example, a large battery is separately arranged in a cylinder 24 for the large battery, and the four small batteries 21 are located in the following cylinder 26. After the battery adopts the above specific structure, the battery can be replaced once every five years. The battery can also be a large-diameter power bank and four small-diameter rechargeable batteries. A large-diameter power bank and the like can be encapsulated in their respective cylinders. After the battery adopts the above specific structure, the replacement time can be longer.

[0031] The pipeline leakage detection device of the present invention further includes an upper cover 2 and a lower cover 3, which are clamped between the upper cover 2 and the lower cover 3 and can be fixed by screwing.

[0032] The above is the prior art and not the inventive point of the present invention, so it will not be described in detail.

[0033] The inventive point of the pipeline leakage detection device of the present invention lies in:

[0034] The pipeline leakage detection device of the present invention further includes a hoop structure for clamping the detection device body 44 on the water pipe.

[0035] The pipeline leakage detection device of the present invention further includes a vertical probe 25 with its bottom end pressing against the water pipe. The top end of the vertical probe 25 presses against the bottom plate 18 of a vibration sound chamber 34. The sensor includes a sound sensor 11 installed on the top plate 10 of the vibration sound chamber 34, such as two sound sensors 11. The sensor further includes a displacement sensor 16. The vertical probe 25 is also fixed to one end of at least one horizontal probe 17, and the other end of the horizontal probe 17 presses against a displacement sensor 16. The inclusion of the sound sensor 11 can be understood as using the sound sensor 11 here. The inclusion of the displacement sensor 16 can be understood as using the displacement sensor 16 here.

[0036] The horizontal probes 17 are preferably two symmetrically arranged ones, and the displacement sensors 16 are preferably two symmetrically arranged ones. Both of the two displacement sensors 16 are electrically connected to the second PCB circuit board 7 via wires 8.

[0037] Each end of the horizontal probe 17 away from the vertical probe 25 preferably has a metal contact plate 35, and the flat contact surface of the metal contact plate 35 abuts against the spherical end face 45 of the displacement sensor 16. The metal contact plate 35 can be square.

[0038] The structure of the above metal contact plate 35 is preferred. Of course, increasing the diameter of the horizontal probe 17 can also ensure that when the vertical probe 25 axially moves within a certain range, this end of the horizontal probe 17 always abuts against the spherical end face 45 of the displacement sensor 16. Also, it is not difficult to understand that during the actual detection process, the so-called certain range is, for example, 1 - 3 millimeters.

[0039] The vibration sound generating chamber 34 includes a top plate 10, a bottom plate 18, and an annular side plate 9 fixedly installed, such as by interference fit or plugging with a pin, inside a cylinder 26. The annular side plate 9 is fixed and sealed with the top plate 10 and the bottom plate 18 to form the vibration sound generating chamber 34 with a circular vibration sound generating cavity 19. Sound sensors 11, such as two sound sensors 11, are fixed at the central part of the top plate 10. The top ends of the sound sensors 11 are electrically connected to the first PCB circuit board 20 through wires. The bottom plate 18 of the vibration sound generating chamber 34 can also be regarded as a tympanic membrane. A cylinder cover 43 is provided at the top of the cylinder 26, and the cylinder 26 and the cylinder cover 43 are detachably connected, such as by screwing or clamping.

[0040] The pipeline leakage detection device of the present invention further includes a circular base 32, which is fixedly installed, such as by interference fit or plugging with a pin, at the inner bottom end of the cylinder 26. The vertical probe 25 is slidably fitted in the central hole 40 of the circular base 32. The displacement sensors 16 are fixed, through their respective mounting seats 33, such as by screwing, clamping, or glue bonding, on the top of the circular base 32. The part of the circular base 32 protruding downward from the bottom end of the cylinder 26 is a hoop mounting part 41. The hoop mounting part 41 is, for example, a clamp mounting part.

[0041] An annular radial groove 31 may be provided on the hoop mounting part 41. The top end of the clamp 4 has a retaining ring 29 with a second opening 37. On the retaining ring 29, there are a pair of pressing handles 36 for manually pressing towards each other to open the second opening 37 for inserting into the annular radial groove 31. After inserting and releasing the pressing handles 36, the circular hole 38 of the retaining ring 29 is sleeved on the annular radial groove 31 to fixedly connect the clamp 4 to the detection device body 44. With the above structure, the processing and assembly of the clamp 4 and the detection device body 44 are more convenient.

[0042] The vertical probe 25 is preferably composed of a core rod 12 and a rod sleeve 14 fixedly sleeved outside the core rod 12. The bottom end of the core rod 12 is a plane 39 that abuts against the top surface of the water pipe. The top end of the rod sleeve 14 is a spherical surface 42 that abuts against the center of the bottom surface of the bottom plate 18 of the vibration sound generating chamber 34. The said fixed sleeving can be an interference fit or fixed by glue bonding.

[0043] One end of the horizontal probe 17 is fixed on the core rod 12 of the vertical probe 25. Vertical long through holes 15 for the up and down movement of the horizontal probe 17 are provided on both sides of the rod sleeve 14. The here fixing is, for example, by welding or the horizontal probe 17 is interference - fitted in a horizontal hole of the core rod 12.

[0044] As described above, the hoop structure is preferably a clamp 4 made of an elastic steel plate. The clamp body is an arc-shaped plate 27 that matches the shape and size of the circular water pipe. One side of the clamp 4 has a first opening 28 for being clamped into the water pipe after being expanded by the water pipe. After the arc-shaped plate 27 is clamped on the water pipe, it is held tightly on the water pipe under the elastic force of the elastic steel plate. The arc-shaped plate 27 can also be called an arc-shaped sleeve. A flexible washer 30 for pressing the water pipe can be provided at the inner top end of the clamp 4. The flexible washer 30 is, for example, an elastic rubber ring, and the flexible washer 30 can be fixed, such as by glue bonding, to the bottom surface of the hoop mounting portion 41.

[0045] On the lower side top wall of the first opening 28 of the clamp 4, there is a guide plate 13 for inserting into the water pipe.

[0046] Closing springs can be provided on both side walls of the first opening 28. For example, one end of the spring is hooked on the lower side wall of the first opening 28, such as on the guide plate 13, and the other end of the spring is hooked on the upper side wall of the first opening 28, that is, the edge of the snap ring 29.

[0047] The described hoop structure can also be composed of two mutually hinged semi-hoop bodies. The diameter after the two semi-hoop bodies are closed is smaller than the diameter of the water pipe, and the opening is sealed by a spring. One end of the spring is hooked on one side wall of the opening, and the other end of the spring is hooked on the other side wall of the opening.

[0048] The described hoop structure can also be a conventional hoop: composed of two mutually hinged semi-hoop bodies. The diameter after the two semi-hoop bodies are closed is smaller than the diameter of the water pipe. Each opening has an ear plate. There are multiple through holes for inserting screws on one ear plate, and corresponding threaded holes on the other ear plate. Multiple screws pass through their respective through holes and are screwed into their respective threaded holes to tighten.

[0049] Parts, structures, quantities, etc. not marked above are not shown in the drawings. The drawings are only schematic. If there are inconsistencies between the drawings and the text description or between the drawings themselves, the text description shall prevail.

[0050] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A pipeline leakage detection device, comprising a sensor that wirelessly transmits the vibration signal converted into an electrical signal to a working base station; characterized in that: The described pipeline leakage detection device further includes a hoop structure for clamping the detection device body onto the water pipe; it also includes a vertical probe rod with its bottom end pressing against the water pipe, and the top end of the vertical probe rod pressing against the bottom plate of a vibration sound chamber. The sensor includes a sound sensor installed on the top plate of the vibration sound chamber; the sensor also includes a displacement sensor; the vertical probe rod is also fixed to one end of at least one horizontal probe rod, and the other end of the at least one horizontal probe rod presses against one of the displacement sensors; The at least one horizontal probe rod consists of two symmetrically arranged ones, and the displacement sensors are two symmetrically arranged ones; Each end of the horizontal probe rod away from the vertical probe rod has a metal contact plate, and the flat contact surface of the metal contact plate abuts against the spherical end face of the displacement sensor; It also includes a circular base fixed to the inner bottom end of a cylinder; the vertical probe rod is slidably fitted in the central hole of the circular base; the displacement sensors are fixed to the top of the circular base through their respective mounting seats; the part of the circular base protruding downward from the bottom end of the cylinder is the hoop mounting part; The vertical probe rod is composed of a core rod and a rod sleeve sleeved outside the core rod. The bottom end of the core rod is a plane that abuts against the top surface of the water pipe; the top end of the rod sleeve is a spherical surface that abuts against the center of the bottom surface of the bottom plate of the vibration sound chamber.

2. The pipeline leakage detection device according to claim 1, wherein: The vibration sound chamber includes a top plate, a bottom plate, and an annular side plate fixed inside the cylinder. The annular side plate is fixed and sealed with the top plate and the bottom plate to form a vibration sound chamber with a circular vibration sound cavity, and the sound sensor is fixed at the central part of the top plate.

3. The pipeline leakage detection device according to claim 1, wherein: One end of the horizontal probe rod is fixed to the core rod of the vertical probe rod, and vertical long through holes for the horizontal probe rod to move up and down are provided on both sides of the rod sleeve.

4. The pipeline leakage detection device according to claim 1, characterized in that: The hoop structure is a clamp made of elastic steel plate. The clamp body is an arc-shaped plate that matches the shape and size of the circular water pipe. One side of the clamp has a first opening for being inserted into the water pipe after being expanded by the water pipe. After the arc-shaped plate is clamped on the water pipe, it is held tightly on the water pipe under the elastic force of the elastic steel plate.

5. The pipeline leakage detection device according to claim 4, characterized in that: A flexible washer for pressing the water pipe is provided at the inner top end of the clamp.

6. The pipeline leakage detection device according to claim 4, characterized in that: A guide plate for inserting into the water pipe is provided on the lower side top wall of the first opening of the clamp.

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