A rock and soil leakage detection device using distributed optical fiber temperature measurement

Abstract

The present invention discloses a rock and soil leakage detection device with distributed optical fiber temperature measurement, which relates to the technical field of rock and soil leakage detection. The device comprises longitudinal steel bars, transverse steel bars connected to the longitudinal steel bars, a second limiting buckle sleeved on one end of the longitudinal steel bars, a first connecting block provided with a latching unit on both sides, two ends of a sensing optical cable connected to an external optical fiber demodulator, and a heating wire inside the sensing optical cable connected to an external heating control module. The present invention provides a connection processing part, and when one end of the sensing optical cable passes through the second hanging ring, the sensing optical cable is pulled toward the first connecting block, so that the second hanging ring is pulled upward by the pulling force of the sensing optical cable, thereby preventing the sensing optical cable between the first connecting block and the second hanging ring from bending irregularly, so that the sensing optical cable is laid in an S-shaped regular manner on one side of the steel cage, thereby preventing the sensing optical cable from bending irregularly and affecting the calculation of the leakage point.

Description

Technical Field

[0001] The present invention relates to the technical field of rock and soil leakage detection, in particular to a rock and soil leakage detection device using distributed optical fiber temperature measurement. Background Art

[0002] Distributed fiber optic temperature measurement system (DTS), also known as fiber optic temperature measurement, achieves temperature monitoring based on the principle of optical time domain reflectometry and the temperature sensitivity of the Raman scattering effect. Generally, when detecting leakage in rock and soil, it is necessary to combine heating wires and optical fibers to form a sensing cable. The temperature rise of the sensing cable is detected, and the temperature distribution difference of the local rock and soil in the leakage area is used to quickly detect the leakage location.

[0003] However, since the optical sensor cable needs to be installed on the steel cage during installation, the contact area between the optical sensor cable and the steel surface will be larger, causing some heat to be transferred to the steel surface during operation, which will affect the accuracy of detection. At the same time, the optical sensor cable cannot be laid neatly, resulting in multiple irregular bends in the cable during laying. This will make it impossible to accurately infer the leakage location when the temperature around the optical cable is abnormal. Summary of the Invention

[0004] The purpose of the present invention is to provide a rock and soil leakage detection device with distributed optical fiber temperature measurement in order to solve the problem that the sensing optical cables cannot be laid neatly and the detection accuracy is low.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a rock and soil leakage detection device with distributed optical fiber temperature measurement, comprising a longitudinal steel bar, a transverse steel bar connected to the longitudinal steel bar, one end of the longitudinal steel bar being sleeved with a second limiting buckle, a first connecting block being installed on the side of the second limiting buckle away from the longitudinal steel bar, the other end of the longitudinal steel bar being sleeved with the first limiting buckle, a second connecting block being provided on the side of the first limiting buckle away from the longitudinal steel bar, a plurality of first hanging rings being installed at the bottom of the first connecting block, the plurality of first hanging rings being arranged equidistantly along the transverse central axis of the first connecting block, a connecting processing member being provided on the second connecting block, a second hanging ring being installed on the second connecting block through the connecting processing member, a sensing optical cable being connected between the first connecting block and the second connecting block through the connecting processing member, a clamping unit being provided on both sides of the first connecting block, two ends of the sensing optical cable being connected to an external optical fiber demodulator, and a heating wire inside the sensing optical cable being connected to an external heating control module.

[0006] As a further solution of the present invention: the connection processing part includes an extension bin installed on the side of the second connecting block away from the second limiting buckle, the inner side of the extension bin is slidably connected to a locking slide, the bottom of the second hanging ring is installed with a guide rod extending to the interior of the second connecting block, the bottom end of the guide rod is provided with a blocking plate located inside the second connecting block, the top of the blocking plate is provided with a return spring located outside the guide rod and connected to the top of the inner wall of the second connecting block, a locking hole is provided on the locking slide, and a positioning bolt is installed on the top of the extension bin.

[0007] As a further solution of the present invention: openings that fit with the locking slide are provided on both sides of the extension compartment, and the thickness of the blocking plate is equal to the thickness of the locking slide.

[0008] As a further solution of the present invention: the maximum moving distance of the second hanging ring is equal to the thickness of the blocking plate, and both sides of the blocking plate are in contact with both sides of the inner wall of the second connecting block.

[0009] As a further solution of the present invention: the positioning unit includes side panels installed on both sides of the first connecting block, positioning guide wheels are installed on the inner sides of the side panels, an insert plate is inserted into the end of the side panel away from the first connecting block, a movable frame is installed on the end of the insert plate away from the side panel, a movable guide wheel is provided on the inner side of the movable frame, a rotating pin extending to the inside of the side panel is provided on the side of the side panel close to the first connecting block, a threaded groove is provided on one side of the insert plate, and a threaded rod located inside the threaded groove is provided at one end of the rotating pin.

[0010] As a further solution of the present invention: the maximum distance between the positioning guide wheel and the movable guide wheel is greater than the diameter of the sensing optical cable, and the minimum distance between the positioning guide wheel and the movable guide wheel is smaller than the diameter of the sensing optical cable.

[0011] As a further solution of the present invention: the inner walls of the first hanging ring and the second hanging ring are both paved with heat insulation cotton.

[0012] As a further solution of the present invention: a through hole having a diameter equal to that of the guide rod is provided on the top of the second connecting block.

[0013] As a further solution of the present invention: the inner wall diameters of the first hanging ring and the second hanging ring are both larger than the outer wall diameter of the sensor optical cable, and arc chamfers are provided on both sides of the first hanging ring and the second hanging ring.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. By setting a connection processing part, when one end of the sensor cable passes through the second hanging ring, the sensor cable is pulled toward the direction of the first connecting block, so that the second hanging ring is pulled upward by the pulling force of the sensor cable, thereby preventing the sensor cable between the first connecting block and the second hanging ring from bending irregularly. At the same time, the blocking plate is misaligned with the extension bin as the guide rod moves upward. When all the second hanging rings on the second connecting block move upward relative to the second connecting block, one side of the locking slide will lose the obstruction of the blocking plate, and the locking slide can be fully inserted into the extension bin. Inside the cage, the locking slide is connected to the extension cage by screwing the positioning bolts, so that the sensing cable is laid in an S-shaped pattern on one side of the steel cage, preventing the sensing cable from bending irregularly and affecting the calculation of the leakage point. At the same time, the second limiting buckle and the first limiting buckle are arranged to leave a gap between the sensing cable and the longitudinal and transverse steel bars, thereby preventing the sensing cable from directly contacting the longitudinal and transverse steel bars, which would cause the temperature on the surface of the sensing cable to be transferred to the longitudinal and transverse steel bars, thereby improving the accuracy of detection.

[0016] 2. By setting a positioning unit, one end of the sensor cable is passed through the positioning guide wheel and the movable guide wheel, and then the sensor cable is laid. When the sensor cable is laid in an "S" shape between the first connecting block and the second connecting block, the rotating pin is twisted to rotate the threaded rod along with the rotating pin, so that the plug-in plate moves toward the positioning guide wheel under the action of the threaded rod and the thread groove. In this way, the movable guide wheel and the positioning guide wheel can clamp and limit the sensor cable, thereby preventing the laid sensor cable from bending irregularly when the sensor cable is electrically connected to the optical fiber demodulator, heating control module and other components, thereby ensuring the stability of the sensor cable between the first connecting block and the second connecting block. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the present invention as a whole;

[0018] Figure 2 This is a schematic diagram of the connection between the sensing optical cable and the first connecting block of the present invention;

[0019] Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 is a structural schematic diagram of the first connecting block of the present invention;

[0021] Figure 5 It is a schematic diagram of the connection between the movable frame and the side panels of the present invention;

[0022] Figure 6 is a structural schematic diagram of the second connecting block of the present invention;

[0023] Figure 7 This is a schematic diagram of the connection between the second connecting block and the second hanging ring of the present invention;

[0024] Figure 8 This is a schematic diagram of the internal structure of the second connecting block of the present invention.

[0025] In the figure: 1. Longitudinal steel bar; 2. Transverse steel bar; 3. Sensing optical cable; 4. First connecting block; 5. First hanging ring; 6. Second connecting block; 7. Second hanging ring; 8. First limiting buckle; 9. Second limiting buckle; 10. Positioning guide wheel; 11. Movable guide wheel; 12. Movable frame; 13. Insert plate; 14. Side plate; 15. Rotating pin; 16. Threaded rod; 17. Threaded groove; 18. Extension bin; 19. Locking slide; 20. Positioning hole; 21. Positioning bolt; 22. Return spring; 23. Blocking plate; 24. Guide rod. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and should not be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected, detachably connected, or connected in one piece; they can be mechanically connected or electrically connected; they can be directly connected, or indirectly connected through an intermediate medium, or they can be internal connections between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following describes an embodiment of the present invention based on its overall structure.

[0028] Example 1

[0029] See also Figures 1 to 8In an embodiment of the present invention, a rock and soil leakage detection device with distributed optical fiber temperature measurement includes a longitudinal steel bar 1, a transverse steel bar 2 is connected to the longitudinal steel bar 1, one end of the longitudinal steel bar 1 is sleeved with a second limiting buckle 9, a first connecting block 4 is installed on the side of the second limiting buckle 9 away from the longitudinal steel bar 1, the other end of the longitudinal steel bar 1 is sleeved with a first limiting buckle 8, a second connecting block 6 is provided on the side of the first limiting buckle 8 away from the longitudinal steel bar 1, a plurality of first hanging rings 5 are installed at the bottom of the first connecting block 4, and the plurality of first hanging rings 5 are equidistantly arranged along the transverse central axis of the first connecting block 4, a connecting processing member is provided on the second connecting block 6, and a second hanging ring 7 is installed on the second connecting block 6 through the connecting processing member, a sensing optical cable 3 is connected between the first connecting block 4 and the second connecting block 6 through the connecting processing member, and a clamping unit is provided on both sides of the first connecting block 4, both ends of the sensing optical cable 3 are connected to an external optical fiber demodulator, and the heating wire inside the sensing optical cable 3 is connected to an external heating control module.

[0030] In this embodiment, a steel cage for installing the sensing optical cable 3 is formed by cross-tying the longitudinal steel bars 1 and the transverse steel bars 2, and then the second limiting buckle 9 and the first limiting buckle 8 are respectively mounted on the two ends of one of the longitudinal steel bars 1, so that the first hanging ring 5 and the second hanging ring 7 are facing opposite directions, and then the first connecting block 4 and the second connecting block 6 are both tied to the steel cage composed of the longitudinal steel bars 1 and the transverse steel bars 2, and then one end of the sensing optical cable 3 is passed through a second hanging ring 7 on the second connecting block 6, and then passed through a first hanging ring 5 on the first connecting block 4, and this is repeated to make the sensing optical cable 3 be laid in an "S" shape on the steel cage composed of the longitudinal steel bars 1 and the transverse steel bars 2. In this process, the sensing optical cable 3 is laid regularly on the steel cage through the operation of the connection processing part, so as to prevent the second connection from being damaged. The sensing optical cable 3 between block 6 and the first connecting block 4 is irregularly bent, and then the sensing optical cables 3 extending from both sides of the first connecting block 4 are positioned by operating the positioning unit, and then the sensing optical cable 3 is electrically connected to external optical fiber demodulators, heating control modules and other components, and then the steel cage with the sensing optical cable 3 is buried in the rock and soil block through concrete, and then the leakage of the rock and soil block between the first connecting block 4 and the second connecting block 6 is detected by intermittent heating of the sensing optical cable 3. If no leakage occurs, the temperature of each point along the sensing optical cable 3 rises synchronously at this time. If leakage occurs, the temperature of the sensing optical cable 3 at the relative position rises slowly due to the influence of the leaking water when heating up, so that the leakage point can be accurately calculated according to the temperature change at the corresponding position of the sensing optical cable 3.

[0031] Example 2

[0032] Please refer to Figure 2 、 Figure 4 、 Figure 6 、 Figure 7 、 Figure 8 , the connection processing part includes an extension bin 18 installed on the side of the second connecting block 6 away from the second limiting buckle 9, and a locking slide 19 is slidably connected to the inner side of the extension bin 18. A guide rod 24 extending to the inside of the second connecting block 6 is installed at the bottom of the second hanging ring 7. A blocking plate 23 located inside the second connecting block 6 is provided at the bottom end of the guide rod 24. A return spring 22 located outside the guide rod 24 and connected to the top of the inner wall of the second connecting block 6 is provided on the top of the blocking plate 23. A positioning hole 20 is opened on the locking slide 19, and a positioning bolt 21 is installed on the top of the extension bin 18;

[0033] Both sides of the extension chamber 18 are provided with openings that fit with the locking slide 19. The thickness of the blocking plate 23 is equal to that of the locking slide 19. By setting this structure, when the blocking plate 23 moves upward, it loses its obstruction to the locking slide 19, so that the locking slide 19 passes through the extension chamber 18 and is inserted into the second connecting block 6, thereby achieving the blocking of the locking slide 19.

[0034] The maximum movement distance of the second hanging ring 7 is equal to the thickness of the blocking plate 23. The two sides of the blocking plate 23 are in contact with the two sides of the inner wall of the second connecting block 6. By setting this structure, when the locking slide 19 is inserted into the second connecting block 6, its top is in contact with the bottom of the blocking plate 23, thereby limiting the position of the second hanging ring 7 and preventing the sensor cable 3 from being continuously subjected to the tension exerted by the elastic restoring force of the reset spring 22.

[0035] The inner wall diameters of the first hanging ring 5 and the second hanging ring 7 are both larger than the outer wall diameter of the sensing optical cable 3. Arc guide angles are provided on both sides of the first hanging ring 5 and the second hanging ring 7. By providing this structure, the friction generated when the sensing optical cable 3 passes through the first hanging ring 5 and the second hanging ring 7 is reduced, thereby reducing the degree of wear of the sensing optical cable 3.

[0036] In this embodiment, when one end of the sensing optical cable 3 passes through the second hanging ring 7, the sensing optical cable 3 is pulled toward the first connecting block 4. When the sensing optical cable 3 between the first connecting block 4 and the second hanging ring 7 is in a straight state, the sensing optical cable 3 is continued to be pulled, so that the second hanging ring 7 is pulled upward by the pulling force of the sensing optical cable 3, thereby preventing the sensing optical cable 3 between the first connecting block 4 and the second hanging ring 7 from bending irregularly. Then, one end of the sensing optical cable 3 is passed through the first connecting block 4. , the second hanging ring 7, by repeatedly pulling one end of the sensor cable 3, the second hanging ring 7 drives the guide rod 24 to rise, thereby contracting the reset spring 22, and at the same time, the blocking plate 23 is misaligned with the extension chamber 18 as the guide rod 24 moves upward. When the second hanging ring 7 on the second connecting block 6 is all moved upward relative to the second connecting block 6, one side of the locking slide 19 will lose the obstruction of the blocking plate 23. At this time, the locking slide 19 can be fully inserted into the extension chamber 18 to make the card When the positioning hole 20 is aligned with the positioning bolt 21, the locking slide 19 and the extension chamber 18 can be connected by tightening the positioning bolt 21. If one of the second hanging rings 7 on the second connecting block 6 does not move upward relative to the second connecting block 6, the locking slide 19 cannot be fully inserted into the extension chamber 18. At this time, it means that there is still a section of the sensing cable 3 between the second connecting block 6 and the first connecting block 4 that is not in a straight state. The sensing cable 3 at this location can then be adjusted to make the sensing cable 3 laid according to the "S" shape on one side of the steel cage to prevent the sensing cable 3 from bending irregularly and affecting the calculation of the leakage point. At the same time, the second limiting buckle 9 and the first limiting buckle 8 are set to leave a gap between the sensing cable 3 and the longitudinal steel bars 1 and the transverse steel bars 2, so as to prevent the sensing cable 3 from directly contacting the longitudinal steel bars 1 and the transverse steel bars 2, causing the temperature on the surface of the sensing cable 3 to be transferred to the longitudinal steel bars 1 and the transverse steel bars 2, thereby improving the accuracy of detection.

[0037] Example 3

[0038] Please refer to Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 The positioning unit includes side plates 14 installed on both sides of the first connecting block 4, and a positioning guide wheel 10 is installed on the inner side of the side plate 14. The end of the side plate 14 away from the first connecting block 4 is plugged with a plug plate 13, and the end of the plug plate 13 away from the side plate 14 is installed with a movable frame 12. A movable guide wheel 11 is provided on the inner side of the movable frame 12. A rotating pin 15 extending to the inside of the side plate 14 is provided on the side of the side plate 14 close to the first connecting block 4. A threaded groove 17 is opened on one side of the plug plate 13, and a threaded rod 16 located inside the threaded groove 17 is provided at one end of the rotating pin 15;

[0039] The maximum distance between the positioning guide wheel 10 and the movable guide wheel 11 is greater than the diameter of the sensing cable 3, and the minimum distance between the positioning guide wheel 10 and the movable guide wheel 11 is less than the diameter of the sensing cable 3. By setting this structure, when one end of the sensing cable 3 passes through the first hanging ring 5 or the second hanging ring 7, the positioning guide wheel 10 guides the sensing cable 3, thereby preventing the sensing cable 3 from being worn;

[0040] The inner walls of the first hanging ring 5 and the second hanging ring 7 are both paved with heat insulation cotton. This structure prevents heat conduction from occurring at the contact points between the sensing optical cable 3 and the first hanging ring 5 and the second hanging ring 7, further improving the accuracy of detection.

[0041] A through hole having a diameter equal to that of the guide rod 24 is provided on the top of the second connecting block 6 , and this structure provides a movable space for the guide rod 24 .

[0042] In this embodiment, one end of the sensing cable 3 is passed through between the positioning guide wheel 10 and the movable guide wheel 11, and then the sensing cable 3 is laid. When the sensing cable 3 is laid in an "S" shape between the first connecting block 4 and the second connecting block 6, the rotating pin 15 is screwed to rotate the threaded rod 16 along with the rotating pin 15, so that the plug plate 13 moves toward the positioning guide wheel 10 under the action of the threaded rod 16 and the thread groove 17. In this way, the movable guide wheel 11 and the positioning guide wheel 10 can clamp and limit the sensing cable 3, thereby preventing the laid sensing cable 3 from bending irregularly when the sensing cable 3 is electrically connected to the optical fiber demodulator, heating control module and other components, thereby ensuring the stability of the sensing cable 3 between the first connecting block 4 and the second connecting block 6.

[0043] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A rock and soil leakage detection device using distributed optical fiber temperature measurement, comprising longitudinal steel bars (1), characterized in that: The longitudinal steel bar (1) is connected to a transverse steel bar (2), one end of the longitudinal steel bar (1) is sleeved with a second limiting buckle (9), a first connecting block (4) is installed on the side of the second limiting buckle (9) away from the longitudinal steel bar (1), the other end of the longitudinal steel bar (1) is sleeved with a first limiting buckle (8), a second connecting block (6) is provided on the side of the first limiting buckle (8) away from the longitudinal steel bar (1), a plurality of first hanging rings (5) are installed on the bottom of the first connecting block (4), the plurality of first hanging rings (5) are equidistantly arranged along the transverse central axis of the first connecting block (4), a connecting processing member is provided on the second connecting block (6), a second hanging ring (7) is installed on the second connecting block (6) through the connecting processing member, a sensing optical cable (3) is connected between the first connecting block (4) and the second connecting block (6) through the connecting processing member, a clamping unit is provided on both sides of the first connecting block (4), both ends of the sensing optical cable (3) are connected to an external optical fiber demodulator, and a heating wire inside the sensing optical cable (3) is connected to an external heating control module; The connection processing part includes an extension bin (18) installed on the side of the second connection block (6) away from the second limiting buckle (9), the inner side of the extension bin (18) is slidably connected to a locking slide plate (19), the bottom of the second hanging ring (7) is installed with a guide rod (24) extending to the inside of the second connection block (6), the bottom end of the guide rod (24) is provided with a blocking plate (23) located inside the second connection block (6), the top of the blocking plate (23) is provided with a return spring (22) located outside the guide rod (24) and connected to the top of the inner wall of the second connection block (6), the locking slide plate (19) is provided with a positioning hole (20), and the top of the extension bin (18) is installed with a positioning bolt (21).

2. The rock and soil leakage detection device using distributed optical fiber temperature measurement according to claim 1, characterized in that: Both sides of the extension bin (18) are provided with openings that fit with the locking slide plate (19), and the thickness of the blocking plate (23) is equal to the thickness of the locking slide plate (19).

3. The rock and soil leakage detection device using distributed optical fiber temperature measurement according to claim 1, characterized in that: The maximum moving distance of the second hanging ring (7) is equal to the thickness of the blocking plate (23), and both sides of the blocking plate (23) are in contact with both sides of the inner wall of the second connecting block (6).

4. The rock and soil leakage detection device using distributed optical fiber temperature measurement according to claim 1, characterized in that: The positioning unit includes side plates (14) installed on both sides of the first connecting block (4), a positioning guide wheel (10) is installed on the inner side of the side plate (14), an insert plate (13) is inserted at one end of the side plate (14) away from the first connecting block (4), a movable frame (12) is installed at one end of the insert plate (13) away from the side plate (14), a movable guide wheel (11) is provided on the inner side of the movable frame (12), a rotating pin (15) extending into the inside of the side plate (14) is provided on one side of the side plate (14) close to the first connecting block (4), a threaded groove (17) is opened on one side of the insert plate (13), and a threaded rod (16) located inside the threaded groove (17) is provided at one end of the rotating pin (15).

5. The rock and soil leakage detection device using distributed optical fiber temperature measurement according to claim 4, characterized in that: The maximum distance between the positioning guide wheel (10) and the movable guide wheel (11) is greater than the diameter of the sensing optical cable (3), and the minimum distance between the positioning guide wheel (10) and the movable guide wheel (11) is less than the diameter of the sensing optical cable (3).

6. The rock and soil leakage detection device using distributed optical fiber temperature measurement according to claim 4, characterized in that: The inner walls of the first hanging ring (5) and the second hanging ring (7) are both paved with heat-insulating cotton.

7. The rock and soil leakage detection device using distributed optical fiber temperature measurement according to claim 4, characterized in that: A through hole having a diameter equal to that of the guide rod (24) is provided on the top of the second connecting block (6).

8. The rock and soil leakage detection device using distributed optical fiber temperature measurement according to claim 4, characterized in that: The inner wall diameters of the first hanging ring (5) and the second hanging ring (7) are both larger than the outer wall diameter of the sensing optical cable (3), and arc chamfers are provided on both sides of the first hanging ring (5) and the second hanging ring (7).

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