CN116908983A - Drilling direct-buried optical cable lowering anti-torsion device and method - Google Patents
Drilling direct-buried optical cable lowering anti-torsion device and method Download PDFInfo
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- CN116908983A CN116908983A CN202310762169.XA CN202310762169A CN116908983A CN 116908983 A CN116908983 A CN 116908983A CN 202310762169 A CN202310762169 A CN 202310762169A CN 116908983 A CN116908983 A CN 116908983A
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- guide rod
- hammer
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- clamping
- optical cable
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- 230000003287 optical effect Effects 0.000 title claims abstract description 95
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000005553 drilling Methods 0.000 title claims abstract description 20
- 230000005540 biological transmission Effects 0.000 claims abstract description 39
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 238000009933 burial Methods 0.000 claims 9
- 239000000835 fiber Substances 0.000 claims 8
- 239000002689 soil Substances 0.000 description 18
- 239000013307 optical fiber Substances 0.000 description 14
- 238000005259 measurement Methods 0.000 description 6
- 238000012544 monitoring process Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/46—Processes or apparatus adapted for installing or repairing optical fibres or optical cables
- G02B6/50—Underground or underwater installation; Installation through tubing, conduits or ducts
- G02B6/504—Installation in solid material, e.g. underground
Abstract
The invention relates to a torsion preventing device and a torsion preventing method for lowering a drilling direct-buried optical cable, comprising the following steps: counterweight guide hammer; the guide rod comprises an upper guide rod and a lower guide rod, and a limit part is arranged on the guide rod along the extending direction of the guide rod; the clamping device is provided with a clamping buckle protruding out of the guide rod and a clamping part for connecting the upper guide rod and the lower guide rod, and a transmission part is arranged between the clamping buckle and the clamping part; the lower guide hammer is used for fixing an optical cable, is sleeved on the guide rod, is provided with a limiting guide part matched with the limiting part, slides along the extending direction of the guide rod and is abutted on the counterweight guide hammer, and is limited to rotate relative to the guide rod through the matching of the limiting part and the limiting guide part.
Description
Technical Field
The invention relates to the technical field of construction of directly buried optical cable in a drill hole, in particular to a device and a method for preventing torsion during the lowering of the directly buried optical cable in the drill hole.
Background
The ground subsidence caused by the compression deformation of the soil body has the difference in space distribution, and different soil layers are compressed differently along the depth direction. By measuring the compression (expansion) deformation of the soil in the vertical direction, the deformation of the soil layers with different depths in the vertical direction can be obtained, so that the ground settlement information can be obtained through accumulation.
By means of the monitoring method of the drilling direct-buried optical cable layout, compression (expansion) deformation information of a soil layer can be sensed through the distributed sensing optical cable buried directly in the vertical direction, and the information can be obtained through demodulation of the technology such as BOTDR in the form of optical fiber strain. Currently, the known drill hole direct-buried optical cable lowering device is composed of a counterweight guide hammer, a sensing optical cable or a sensing lead, a binding belt, a guide hammer protective sleeve, a full-distributed optical fiber demodulator, a quasi-distributed optical fiber grating demodulator, a drill rod and an optical fiber grating osmometer (optional); optical fiber grating displacement meter (optional), fixing device, etc. The whole operation flow of the drilling direct-buried optical cable layout is generally as follows: drilling, changing slurry, clearing holes, lowering the optical cable, pre-stretching the optical cable and protecting the hole, wherein each operation step is strictly required. In the whole lowering process of the conventional hammer-guiding connection optical fiber: when the sensing optical cable and the sensor are installed, the metal counterweight guide hammer is preferably used for assisting in lowering. The diameter of the counterweight guide hammer is smaller than 2/3 of the diameter of the drilling hole, and the mass is in the range of 15 kg-25 kg.
For example: the invention discloses a technical scheme for measuring soil deformation by adopting a sensing optical cable to obtain ground settlement information, which is disclosed by publication number CN103438820A and named as a method for measuring layered deformation optical fibers of rock and soil bodies of a drilling section, and comprises the following steps: selecting a measuring point, recording a soil layer after drilling, backfilling the hole after lowering the sensing optical fiber after forming the hole, and when the rock-soil body around the sensing optical fiber deforms, taking the sensing optical fiber to deform due to the wrapping force of the surrounding soil body, measuring the strain distribution of the sensing optical fiber through BOTDR/A and other technologies, so that the strain distribution condition of the corresponding position of the drilling section can be obtained, and the deformation condition of each soil layer of the deep rock-soil body can be obtained by integrating the obtained strain along the optical fiber at the corresponding position, thereby realizing the layered deformation distributed measurement of the rock-soil body of the drilling section, and being suitable for the rock-soil body deformation monitoring fields such as ground subsidence, mine and the like.
However, in the process of directly burying and lowering the optical cable by adopting the method in the prior art, two problems exist:
1. in the prior art, the optical cable is laid down by adopting the structural cooperation of the guide rod and the guide hammer, the optical cable is fixed on the guide hammer, the optical cable is laid down to the bottom of the drill hole through the guide rod, when the optical cable is laid down, the guide rod is hung and lifted by adopting the laying equipment, the guide rod is difficult to control not to rotate, the guide rod can possibly rotate when contacting soil or freely laid down, the optical cable fixed on the guide hammer is easy to rotate at the moment, so that the deformation coordination and the strain transmissibility of the optical fiber are influenced, and finally, the measured strain can generate deviation.
2. After the optical cable is placed down, the guide hammer is required to be buried in the drill hole, the guide rod is required to be taken out, so that the guide rod and the guide hammer are required to be connected in a detachable mode, or the guide rod can be separated in a sectional mode and can be left in the drill hole in a small part, and most of the guide rod is taken out from the drill hole, so that a construction difficulty is caused, namely, the guide rod and the guide hammer are connected in a detachable mode, most of the prior art adopts a threaded connection or a rotary clamping mode, the guide rod is required to be rotated when the guide rod is detached, the guide hammer is possibly driven to rotate in the rotating process, so that the optical cable fixed on the guide hammer is rotated, the deformation coordination and the strain transmissibility of the optical fiber can be influenced, and finally the measured strain can generate deviation.
Disclosure of Invention
Therefore, the invention aims to solve the technical problem that the optical cable is easy to twist when being directly buried in the prior art, and provides the device and the method for preventing twisting when the optical cable is placed in the drill hole, which can limit the torsion of the optical cable when the optical cable is placed in the drill hole, and can take out the guide rod under the condition of not rotating the guide rod after the optical cable is placed in the drill hole, so that the optical cable can not twist, and the measurement accuracy is ensured.
In order to solve the technical problems, the invention provides a drill hole direct-buried optical cable lowering anti-torsion device, which comprises:
counterweight guide hammer;
the guide rod comprises an upper guide rod and a lower guide rod, the upper guide rod and the lower guide rod are detachably spliced, the end part of the lower guide rod is fixedly connected with the counterweight guide hammer, and a limiting part is arranged on the guide rod along the extending direction of the guide rod;
the clamping device is arranged in the guide rod and is provided with a clamp protruding out of the guide rod and a clamping part for connecting the upper guide rod and the lower guide rod, and a transmission part is arranged between the clamp and the clamping part;
the guiding hammer is used for fixing an optical cable, the guiding hammer is sleeved on the guide rod, the guiding hammer is provided with a limiting guide part matched with the limiting part, and the guiding hammer slides along the extending direction of the guide rod and is abutted to the counterweight guiding hammer, wherein: the limiting part is matched with the limiting guide part to limit the descending guide hammer to rotate relative to the guide rod, and when the descending guide hammer passes through the clamping device, the descending guide hammer extrudes the buckle, and the clamping part is pushed to move through the buckle, so that the upper guide rod and the lower guide rod are separated.
In one embodiment of the invention, the clamping device is arranged in the lower guide rod, a through hole for the buckle to pass through is formed in the lower guide rod, one end of the buckle is movably connected to the lower guide rod through a pivot, the other end of the buckle passes through the through hole and protrudes out of the lower guide rod, and a torsion spring is arranged at the pivot connection part of the buckle and the lower guide rod to limit the rotation of the buckle relative to the lower guide rod.
In one embodiment of the present invention, the clamping portion includes:
the clamping arm is rotationally connected to the transmission part, a clamping block is arranged at the end head of the clamping arm, and a clamping groove into which the clamping block is inserted is formed in the upper guide rod, so that the upper guide rod and the lower guide rod can be prevented from being separated;
and one end of the elastic stretching piece is fixed on the transmission part, the other end of the elastic stretching piece is connected with the clamping arm, and when the transmission part pushes the clamping block to move out of the clamping groove, the elastic stretching piece stretches the clamping arm to rotate, so that the clamping arm does not block the upper guide rod from being separated from the lower guide rod.
In one embodiment of the invention, the transmission part includes:
the transmission arm is connected with the buckle;
and one end of the transmission rod is movably connected with the buckle, the other end of the transmission rod is connected with the clamping part, the transmission arm is driven to rotate by the force of the buckle, and the clamping part is driven to move along the extending direction of the transmission rod by the transmission rod.
In one embodiment of the invention, the guide rod is a polygonal guide rod, the limit part is formed by two adjacent sides of the polygonal guide rod and an included angle between the two sides of the polygonal guide rod, the lowering guide hammer is provided with a polygonal through hole matched with the cross section shape of the guide rod, and the limit guide part is formed by two adjacent sides of the polygonal through hole and an included angle between the two sides of the polygonal through hole.
In one embodiment of the invention, the cooperation of the limiting part and the limiting guide part is a cooperation structure of a protrusion and a groove, namely, a limiting protrusion is arranged on the guide rod, a limiting groove matched with the limiting protrusion in shape is arranged on the lowering guide hammer, or a limiting protrusion is arranged on the guide rod, and a limiting groove matched with the limiting protrusion in shape is arranged on the lowering guide hammer.
In one embodiment of the invention, a containing groove is arranged on the connecting surface of the counterweight guide hammer and the guide rod, the lowering guide hammer can be inserted into the containing groove, and the position of the lowering guide hammer in the containing groove is relatively fixed.
In one embodiment of the invention, the end of the counterweight guide hammer is provided with a steel needle.
In one embodiment of the present invention, the clamping device is disposed at a position higher than a height of the drop guide hammer after the drop guide hammer is abutted against the counterweight guide hammer, and the upper guide rod is taken out after the drop guide hammer completely passes through the clamping device.
The invention also discloses a drill hole direct-buried optical cable lowering anti-torsion method, which is completed by applying the drill hole direct-buried optical cable lowering anti-torsion device and comprises the following steps:
the guide rod connected with the counterweight guide hammer is placed in the drill hole, the bottom of the counterweight guide hammer is contacted with the bottom of the drill hole, and the counterweight guide hammer is pre-buried and fixed;
fixing the optical cable on a descending guide hammer, sliding the descending guide hammer along the extending direction of the guide rod from the end part of the guide rod to the counterweight guide hammer, and limiting and matching the descending guide hammer and the guide rod to limit the descending guide hammer to rotate relative to the guide rod in the sliding process;
in the process of lowering the guide hammer, the optical cable is always tensioned to enable the optical cable to be in a tight state;
when the descending guide hammer passes through the clamping device, the descending guide hammer extrudes a buckle of the clamping device, and the clamping part is pushed to move by the buckle so as to separate the upper guide rod from the lower guide rod;
when the lowering guide hammer is abutted with the counterweight guide hammer, the upper guide rod is taken out of the drill hole;
continuously tensioning the optical cable to enable the optical cable to be in a tensioned state, and simultaneously backfilling the drill hole with backfill material.
Compared with the prior art, the technical scheme of the invention has the following advantages:
according to the drill hole direct-buried optical cable lowering anti-torsion device, the assembly mode that a counterweight guide hammer, a guide rod and an optical cable are integrally connected in the drill hole direct-buried optical cable lowering device in the prior art is changed, the split counterweight guide hammer and the lowering guide hammer are arranged, the counterweight guide hammer is connected with the guide rod, the lowering guide hammer is connected with an optical cable to be lowered, and the lowering guide hammer is limited to rotate relative to the guide rod while relative sliding of the lowering guide hammer relative to the guide rod is ensured by limiting cooperation of the guide rod and the lowering guide hammer, so that the lowering direction and the lowering position of the optical cable can be determined, and meanwhile, the optical cable can be prevented from being twisted in the lowering process;
the lower guide rod is provided with a clamping device, the clamping device comprises a buckle protruding out of the guide rod and a clamping part connecting the upper guide rod and the lower guide rod, when the lower guide hammer slides relatively along the guide rod and passes through the clamping device, the inner wall of the lower guide hammer can extrude the buckle, the clamping part is pushed to move by the buckle, the upper guide rod and the lower guide rod can be separated, and thus, after the optical cable is put down, the guide rod can be taken out without rotating the guide rod, and the optical cable is ensured not to twist;
the drill hole direct-buried optical cable lowering anti-torsion device can prevent the optical cable from torsion in the process of lowering the optical cable and the process of taking out the guide rod after lowering, and ensure that the optical cable has higher precision when being used as a sensing element in the subsequent measurement and the monitoring accuracy.
According to the method for preventing torsion during the lowering of the drilling direct-buried optical cable, the device is used for completing the direct-buried lowering project of the optical cable in the drilling, the optical cable can be kept in a straight and non-torsion state during the lowering process, the optical cable is ensured to have higher precision when being used as a sensing element in the subsequent measurement, and the monitoring accuracy is ensured.
Drawings
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings, in which
FIG. 1 is a schematic view of the overall structure of a torsion-preventing device for lowering a borehole direct-buried optical cable of the present invention;
FIG. 2 is a schematic diagram of the configuration of the counter weight guide hammer and drop guide hammer of the present invention in combination;
FIG. 3 is a schematic view of a structure of a clamping device according to the present invention;
description of the specification reference numerals: 1. counterweight guide hammer; 11. a receiving groove; 2. a guide rod; 21. a limit part; 22. an upper guide bar; 23. a lower guide rod; 3. a clamping device; 31. a buckle; 32. a transmission arm; 33. a transmission rod; 34. a clamping arm; 35. an elastic stretching member; 36. a clamping block; 37. a clamping groove; 38. a torsion spring; 4. lowering a guide hammer; 41. a limit guide part; 42. a plug-in part; 5. a steel needle; 6. an optical cable.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the invention and practice it.
As mentioned before, when the optical cable is directly buried in the borehole in the prior art, two technical problems mainly exist during construction:
when the optical cable is lowered, the rotation of the optical cable 6 is difficult to control, and because the optical cable 6 is fixed on the optical cable, the optical cable 6 is driven to rotate by the rotation of the optical cable 6, and the torsion of the optical cable 6 is caused;
after the lowering is completed, the guiding rod of the lowering guiding hammer is required to be taken out, the optical cable 6 can be completely backfilled in the drill hole, the existing detachable connecting mode of the guiding rod generally adopts a threaded or rotary clamping connecting mode, and when the rotary guiding rod is separated, even if the guiding hammer is buried in soil, the guiding hammer can be driven to slightly rotate, so that the optical cable 6 can be twisted.
Therefore, the present invention is intended to solve the above two technical difficulties, and the torsion of the optical cable 6 can be prevented during the process of lowering the optical cable 6 and taking out the guide rod, and the technical scheme and the beneficial effects of the present invention are further described below with reference to specific embodiments.
Example 1
Referring to fig. 1, the invention discloses a torsion preventing device for lowering a drilling direct-buried optical cable, which comprises: counterweight guide hammer 1, guide arm 2, joint device 3 and drop guide hammer 4, wherein: the counterweight guide hammer 1 is arranged at one end part of the guide rod 2, the counterweight guide hammer 1 is guided and placed at the bottommost part of a drill hole through the guide rod 2 by realizing the descending action of the counterweight guide hammer 1 in the drill hole through the guide rod 2, a descending through hole is formed in the descending guide hammer 4, the guide rod 2 can be arranged in the descending through hole in a penetrating manner, the descending guide hammer 4 can be sleeved outside the guide rod 2 through the descending through hole, and the descending guide hammer 4 slides along the extending direction of the guide rod 2 and is abutted to the counterweight guide hammer 1;
referring to fig. 2, a limiting part 21 is provided on the guide rod 2 along the extending direction of the guide rod 2, a limiting guide part 41 matched with the limiting part 21 is provided on the lowering guide hammer 4, and through the limiting matching of the guide rod 2 and the lowering guide hammer 4, the lowering guide hammer 4 can be limited to rotate relative to the guide rod 2 while the relative sliding of the lowering guide hammer 4 relative to the guide rod 2 is ensured, and the optical cable 6 is fixed on the lowering guide hammer 4, so that the lowering direction and the lowering position of the optical cable 6 can be determined, and meanwhile, the optical cable 6 can be prevented from twisting in the lowering process;
referring to fig. 2 and 3, the guide rod 2 includes an upper guide rod 22 and a lower guide rod 23, the upper guide rod 22 and the lower guide rod 23 are detachably spliced, the upper guide rod 22 and the lower guide rod 23 are connected through the clamping device 3, the counterweight guide hammer 1 is connected to the lower guide rod 23, the clamping device 3 is disposed inside the guide rod 2, a buckle protruding from the guide rod 2 and a clamping part connecting the upper guide rod 22 and the lower guide rod 23 are provided, a transmission part is disposed between the buckle and the clamping part, when the lowering guide hammer 4 passes through the clamping device 3, the lowering guide hammer 4 extrudes the buckle, and power pushing the buckle to move is transmitted to the clamping part through the transmission part, so that the clamping part is driven to move, and the upper guide rod 22 and the lower guide rod 23 are separated, so that the upper guide rod 22 can be taken out without rotating the guide rod 2, and the cable 6 is ensured not to twist.
In summary, through the drill hole direct-buried optical cable lowering anti-torsion device disclosed by the invention, the optical cable 6 can be prevented from being twisted in the process of lowering the optical cable 6 and the process of taking out the guide rod 2 after lowering, so that the optical cable 6 is ensured to have higher precision when being used as a sensing element in subsequent measurement, and the monitoring accuracy is ensured.
Specifically, referring to fig. 3, the clamping device 3 is disposed inside the lower guide rod 23, and the clamping device 3 includes a buckle 31, a transmission portion, and a clamping portion, where: the lower guide rod 23 is provided with a through hole through which the buckle 31 passes, one end of the buckle 31 is movably connected to the lower guide rod 23 through a pivot, the other end of the buckle 31 passes through the through hole and protrudes out of the lower guide rod 23, and the transmission part comprises: the transmission arm 32 and transfer line 33, the transmission arm 32 with buckle 31 is connected, transfer line 33 one end with buckle 31 swing joint, the other end with joint portion is connected, joint portion includes: the clamping arm 34 is rotatably connected to the transmission part, a clamping block 36 is arranged at the end of the clamping arm 34, a clamping groove 37 into which the clamping block 36 is inserted is formed in the upper guide rod 22, the upper guide rod 22 and the lower guide rod 23 can be prevented from being separated, one end of the elastic stretching piece 35 is fixed to the transmission rod 33 on the transmission part, and the other end of the elastic stretching piece is connected with the clamping arm 34;
the clamping device 3 in this embodiment is adopted to realize the specific action of separating the upper guide rod 22 from the lower guide rod 23 as follows:
when the lowering guide hammer 4 passes through the position of the buckle 31, the lowering guide hammer 4 and the buckle 31 protruding out of the guide rod 2 can pass through and can press the buckle 31 to move inwards by taking the pivot as the axis, in the moving process, the buckle 31 pushes the transmission arm 32 to rotate, the transmission arm 32 pushes the clamping part to move along the extending direction of the transmission rod 33 after rotating, and as the clamping arm 34 is fixed on the transmission rod 33, the transmission rod 33 moves to drive the clamping arm 34 to move upwards wholly, so that the clamping block 36 can be moved out of the clamping groove 37, and after the clamping block 36 is moved out of the clamping groove 37, the elastic stretching piece 35 stretches the clamping arm 34 to rotate, and the clamping arm 34 rotates upwards, so that the clamping arm 34 does not block the upper guide rod 22 from being separated from the lower guide rod 23.
Specifically, in this embodiment, the buckle 31 needs to be set to rotate around the pivot only when being pressed by the outside, so that the pivot connection portion between the buckle 31 and the lower guide rod 23 is provided with the torsion spring 38 to limit the rotation of the buckle 31 relative to the lower guide rod 23, the buckle 31 can be continuously pushed to be in a state protruding from the guide rod 2 by the torsion spring 38, and only when being pressed by the lowering guide hammer 4, a reverse acting force can be applied to the torsion spring 38, and the acting force is greater than the elastic force of the torsion spring 38, so that the buckle 31 is pushed to move inwards.
Referring to fig. 2, in this embodiment, the clamping device 3 is disposed at a position higher than a height of the drop hammer 4 after abutting on the counterweight guide hammer 1, and the drop hammer 4 is completely passed through the clamping device 3 and then the upper guide rod 22 is taken out, and after the upper guide rod 22 is taken out, the lower guide rod 23 still supports the lower guide hammer, so that the position of the drop hammer 4 is not affected.
Referring to fig. 2, in this embodiment, the guide rod 2 is a polygonal guide rod 2, the limiting portion 21 is formed by two adjacent sides of the polygonal guide rod 2 and an included angle between the two sides of the polygonal guide rod, a polygonal through hole matching with the cross-sectional shape of the guide rod 2 is formed in the drop guide hammer 4, the limiting guide portion 41 is formed by two adjacent sides of the polygonal through hole and an included angle between the two sides of the polygonal through hole, and the polygonal guide rod 2 and the polygonal through hole have a unique position matching relationship.
Specifically, in other embodiments, in order to set the guide rod 2 and the lowering guide hammer 4 in a limit fit, the fit of the limit portion 21 and the limit guide portion 41 may be a protrusion and groove fit structure, that is, a limit protrusion is disposed on the guide rod 2, a limit groove matching with the shape of the limit protrusion is disposed on the lowering guide hammer 4, or a limit protrusion is disposed on the guide rod 2, and a limit groove matching with the shape of the limit protrusion is disposed on the lowering guide hammer 4.
Referring to fig. 2, in this embodiment, the drop weight 4 needs to be placed on the counterweight guide weight 1, after the placement is stable, the stability of the relative positions of the drop weight 4 and the counterweight guide weight 1 needs to be ensured, so in this embodiment, a receiving groove 11 is provided on the connection surface of the counterweight guide weight 1 and the guide rod 2, the drop weight 4 can be inserted into the receiving groove 11, an inserting part 42 matching with the receiving groove 11 is provided at the bottom of the drop weight 4, and the position of the drop weight 4 in the receiving groove 11 is relatively fixed by matching the inserting part 42 with the receiving groove 11.
Referring to fig. 1 and 2, in the present embodiment, it is necessary to provide the weight guide hammer 1 to be inserted into the soil at the bottom of the borehole, and therefore, a steel needle 5 is provided at the end of the weight guide hammer 1, and the position of the weight guide hammer 1 can be fixed by inserting the steel needle 5 into the soil.
Example 2
The invention also discloses a drill hole direct-buried optical cable lowering anti-torsion method, which is completed by applying the drill hole direct-buried optical cable lowering anti-torsion device in the embodiment 1, and comprises the following steps:
drilling and cleaning holes at the position of the land to be monitored;
the guide rod 2 connected with the counterweight guide hammer 1 is lowered into a drill hole, the bottom of the counterweight guide hammer 1 is contacted with the bottom of the drill hole, the counterweight guide hammer 1 is pre-buried and fixed, and when the counterweight guide hammer 1 is pre-buried and fixed, equipment is adopted to assist in controlling the guide rod 2 to be vertically upwards;
the optical cable 6 is fixed on the descending guide hammer 4, the optical cable 6 is bound and fixed through a binding belt, the descending guide hammer 4 slides along the extending direction of the guide rod 2 from the end part of the guide rod 2 to the direction of the counterweight guide hammer 1, and in the sliding process, the descending guide hammer 4 and the guide rod 2 are limited to be matched in a limiting manner, so that the descending guide hammer 4 is limited to rotate relative to the guide rod 2;
in the process of lowering the guide hammer 4, the optical cable 6 is always tensioned so that the optical cable 6 is in a tight state;
when the descending guide hammer 4 passes through the clamping device 3, the descending guide hammer 4 presses a buckle 31 of the clamping device 3, and the clamping part is pushed to move through the buckle 31, so that the upper guide rod 22 and the lower guide rod 23 are separated;
when the lowering guide hammer 4 is abutted with the counterweight guide hammer 1, the upper guide rod 22 is taken out of the drill hole;
continued tightening of the cable 6 places the cable 6 in tension while backfilling the borehole with backfill material.
According to the method for preventing torsion during the lowering of the drilling direct-buried optical cable 6, the device is used for completing the direct-buried lowering project of the optical cable 6 in the drilling, and the optical cable 6 can be kept in a straight and non-torsion state during the lowering, rod taking and backfilling processes, so that the optical cable 6 is ensured to have higher precision when being used as a sensing element in the subsequent measurement, and the monitoring accuracy is ensured.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present invention will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (10)
1. The utility model provides a drilling direct burial optical cable puts down anti-torsion device which characterized in that includes:
counterweight guide hammer;
the guide rod comprises an upper guide rod and a lower guide rod, the upper guide rod and the lower guide rod are detachably spliced, the end part of the lower guide rod is fixedly connected with the counterweight guide hammer, and a limiting part is arranged on the guide rod along the extending direction of the guide rod;
the clamping device is arranged in the guide rod and is provided with a clamp protruding out of the guide rod and a clamping part for connecting the upper guide rod and the lower guide rod, and a transmission part is arranged between the clamp and the clamping part;
the guiding hammer is used for fixing an optical cable, the guiding hammer is sleeved on the guide rod, the guiding hammer is provided with a limiting guide part matched with the limiting part, and the guiding hammer slides along the extending direction of the guide rod and is abutted to the counterweight guiding hammer, wherein: the limiting part is matched with the limiting guide part to limit the descending guide hammer to rotate relative to the guide rod, and when the descending guide hammer passes through the clamping device, the descending guide hammer extrudes the buckle, and the clamping part is pushed to move through the buckle, so that the upper guide rod and the lower guide rod are separated.
2. The borehole direct burial fiber optic cable lowering anti-twist device of claim 1, wherein: the clamping device is arranged inside the lower guide rod, a through hole for the buckle to pass through is formed in the lower guide rod, one end of the buckle is movably connected to the lower guide rod through a pivot, the other end of the buckle passes through the through hole and protrudes out of the lower guide rod, and a torsion spring is arranged at the pivot connection part of the buckle and the lower guide rod to limit the buckle to rotate relative to the lower guide rod.
3. The borehole direct burial fiber optic cable lowering anti-twist device of claim 1, wherein: the clamping portion includes:
the clamping arm is rotationally connected to the transmission part, a clamping block is arranged at the end head of the clamping arm, and a clamping groove into which the clamping block is inserted is formed in the upper guide rod, so that the upper guide rod and the lower guide rod can be prevented from being separated;
and one end of the elastic stretching piece is fixed on the transmission part, the other end of the elastic stretching piece is connected with the clamping arm, and when the transmission part pushes the clamping block to move out of the clamping groove, the elastic stretching piece stretches the clamping arm to rotate, so that the clamping arm does not block the upper guide rod from being separated from the lower guide rod.
4. The borehole direct burial fiber optic cable lowering anti-twist device of claim 1, wherein: the transmission part includes:
the transmission arm is connected with the buckle;
and one end of the transmission rod is movably connected with the buckle, the other end of the transmission rod is connected with the clamping part, the transmission arm is driven to rotate by the force of the buckle, and the clamping part is driven to move along the extending direction of the transmission rod by the transmission rod.
5. The borehole direct burial fiber optic cable lowering anti-twist device of claim 1, wherein: the guide rod is a polygonal guide rod, the limiting part is formed by two adjacent sides of the polygonal guide rod and an included angle between the two sides of the polygonal guide rod, a polygonal through hole matched with the cross section of the guide rod is formed in the lowering guide hammer, and the limiting guide part is formed by two adjacent sides of the polygonal through hole and the included angle between the two sides of the polygonal through hole.
6. The borehole direct burial fiber optic cable lowering anti-twist device of claim 1, wherein: the cooperation of spacing portion with spacing guiding portion is protruding and recess's cooperation structure be provided with spacing arch promptly on the guide arm be provided with on the drop guide hammer with spacing recess that spacing protruding shape matches, perhaps, be provided with spacing arch on the guide arm be provided with on the drop guide hammer with spacing recess that spacing protruding shape matches.
7. The borehole direct burial fiber optic cable lowering anti-twist device of claim 1, wherein: the counterweight guide hammer and the connecting surface of the guide rod are provided with accommodating grooves, the descending guide hammer can be inserted into the accommodating grooves, and the positions of the descending guide hammer in the accommodating grooves are relatively fixed.
8. The borehole direct burial fiber optic cable lowering anti-twist device of claim 1, wherein: the end part of the counterweight guide hammer is provided with a steel needle.
9. The borehole direct burial fiber optic cable lowering anti-twist device of claim 1, wherein: the clamping device is arranged at a position higher than the height of the downward-falling guide hammer after being abutted on the counter weight guide hammer, and the upward-falling guide hammer is taken out after completely passing through the clamping device.
10. A torsion preventing method for lowering a drilling direct-buried optical cable is characterized in that: the method for lowering the torsion-proof device by using the drilling direct-buried optical cable according to any one of claims 1 to 9, comprising the following steps:
the guide rod connected with the counterweight guide hammer is placed in the drill hole, the bottom of the counterweight guide hammer is contacted with the bottom of the drill hole, and the counterweight guide hammer is pre-buried and fixed;
fixing the optical cable on a descending guide hammer, sliding the descending guide hammer along the extending direction of the guide rod from the end part of the guide rod to the counterweight guide hammer, and limiting and matching the descending guide hammer and the guide rod to limit the descending guide hammer to rotate relative to the guide rod in the sliding process;
in the process of lowering the guide hammer, the optical cable is always tensioned to enable the optical cable to be in a tight state;
when the descending guide hammer passes through the clamping device, the descending guide hammer extrudes a buckle of the clamping device, and the clamping part is pushed to move by the buckle so as to separate the upper guide rod from the lower guide rod;
when the lowering guide hammer is abutted with the counterweight guide hammer, the upper guide rod is taken out of the drill hole;
continuously tensioning the optical cable to enable the optical cable to be in a tensioned state, and simultaneously backfilling the drill hole with backfill material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310762169.XA CN116908983A (en) | 2023-06-27 | 2023-06-27 | Drilling direct-buried optical cable lowering anti-torsion device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310762169.XA CN116908983A (en) | 2023-06-27 | 2023-06-27 | Drilling direct-buried optical cable lowering anti-torsion device and method |
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| US4673043A (en) * | 1984-12-24 | 1987-06-16 | Wacker Werke Gmbh & Co. Kg | Hammer having a protective cover |
| US20010047887A1 (en) * | 1999-03-03 | 2001-12-06 | Wentworth Steven W. | Drill head for directional boring |
| CN103438820A (en) * | 2013-09-05 | 2013-12-11 | 南京大学 | Borehole profile rock and soil mass layered deformation optical fiber measuring method |
| CN107543568A (en) * | 2017-09-15 | 2018-01-05 | 南京大学（苏州）高新技术研究院 | A kind of distributed sensing optical cable with boring distribution method and device |
| CN113738340A (en) * | 2021-09-01 | 2021-12-03 | 苏州南智传感科技有限公司 | Real-time monitoring device and monitoring method for backfill progress of drill hole |
| CN113959470A (en) * | 2021-09-08 | 2022-01-21 | 中煤科工生态环境科技有限公司 | Coal mine goaf overlying strata moving distributed optical fiber measurement guide head and monitoring method |
-
2023
- 2023-06-27 CN CN202310762169.XA patent/CN116908983A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4673043A (en) * | 1984-12-24 | 1987-06-16 | Wacker Werke Gmbh & Co. Kg | Hammer having a protective cover |
| US20010047887A1 (en) * | 1999-03-03 | 2001-12-06 | Wentworth Steven W. | Drill head for directional boring |
| CN103438820A (en) * | 2013-09-05 | 2013-12-11 | 南京大学 | Borehole profile rock and soil mass layered deformation optical fiber measuring method |
| CN107543568A (en) * | 2017-09-15 | 2018-01-05 | 南京大学（苏州）高新技术研究院 | A kind of distributed sensing optical cable with boring distribution method and device |
| CN113738340A (en) * | 2021-09-01 | 2021-12-03 | 苏州南智传感科技有限公司 | Real-time monitoring device and monitoring method for backfill progress of drill hole |
| CN113959470A (en) * | 2021-09-08 | 2022-01-21 | 中煤科工生态环境科技有限公司 | Coal mine goaf overlying strata moving distributed optical fiber measurement guide head and monitoring method |
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