Roof displacement monitor

Abstract

A top plate displacement monitor comprises a first shell, a mounting sleeve is arranged on one side of the first shell, and a guide pipe assembly is mounted on the side, away from the first shell, of the mounting sleeve; a winding wheel is arranged on the outer side, away from the mounting sleeve, of the first shell, multiple strands of steel wire ropes are wound around the winding wheel, and the multiple strands of steel wire ropes sequentially penetrate through the first shell, the mounting sleeve and the guide pipe assembly to be connected with clamping heads; a plurality of moving blocks corresponding to the steel wire ropes are arranged in the mounting sleeve, the steel wire ropes penetrate through the moving blocks and can be fixed to the moving blocks, a plurality of rotating wheel assemblies corresponding to the moving blocks are rotationally arranged in the first shell, pull ropes are wound around the rotating wheel assemblies, and the pull ropes penetrate into the mounting sleeve to be connected with the moving blocks. The spiral spring is driven to be wound towards the rope winding wheel, tension can be applied to the rope winding wheel through self elasticity, then the moving block always applies stable tension force to the steel wire rope, the structure can effectively prevent the steel wire rope from loosening, it is ensured that the steel wire rope is in a tightened state all the time, and the accuracy of measured data is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the technical field of mine safety monitoring equipment, specifically a roof displacement monitoring instrument. Background Technology

[0002] In mining, tunnel construction, and underground engineering, roof displacement monitoring is a crucial step in ensuring project safety and the safety of personnel and property. Accurate monitoring of roof displacement changes allows for the timely detection of roof deformation trends, providing vital information for engineering support, repair, and reinforcement, and effectively preventing accidents such as roof collapses and falls.

[0003] In existing technologies, roof displacement monitoring instruments are commonly used to monitor delamination of surrounding rock in mines. These instruments often feature automatic alarms, significantly improving reliability and safety. They can be used underground for extended periods without maintenance. The roof displacement monitoring instrument mainly consists of a mechanical component, electronic components, and a guide tube. The mechanical component connects the anchor claws and electronic components, and is suspended from the roof via the guide tube. It includes a slider and a scale. The slider is connected to the anchor claws via a wire rope and to the scale of the mechanical component. When roof delamination occurs, the displacement is displayed on the scale and transmitted to the electronic components, which convert it into an electrical signal for output display. However, in actual use, the inventors discovered measurement errors. Existing monitoring instruments typically use a wire rope to reflect the displacement value, but the tension control of the wire rope is insufficient. During actual testing, when roof displacement occurs, the wire rope is prone to loosening, leading to a significant increase in measurement errors. Utility Model Content

[0004] To address the technical problems existing in the background art, this utility model provides a top plate displacement monitoring instrument.

[0005] The technical solution of this utility model is as follows:

[0006] A top plate displacement monitoring device includes a first housing, and a mounting sleeve is provided on one side of the housing. A conduit assembly is installed on the side of the mounting sleeve away from the first housing.

[0007] A winding wheel is provided on the outer side of the first housing away from the mounting sleeve, and multiple strands of steel wire rope are wound on the winding wheel. The multiple strands of steel wire rope pass through the first housing, the mounting sleeve and the guide tube assembly in sequence and are connected to the clamping joint.

[0008] The mounting sleeve has multiple movable blocks corresponding to the steel wire rope, and the steel wire rope passes through the movable blocks and can be fixed thereto. The first housing has multiple rotating wheel assemblies rotatably arranged corresponding to the movable blocks, and the rotating wheel assemblies are wound with pull ropes. The pull ropes pass through the mounting sleeve and are connected to the movable blocks.

[0009] The specific design of the rotating wheel assembly is as follows: the rotating wheel assembly includes a first rotating shaft rotatably connected to the first housing, and a rope winding wheel is connected to the outer edge of the first rotating shaft. The rope winding wheel has a first annular groove for winding a pull rope.

[0010] In order to improve the tension of the wire rope and ensure the accuracy of the measurement, multiple spiral springs and a second rotating shaft are provided in the first housing corresponding to the rope winding wheel, and the spiral springs are installed on the outer edge of the second rotating shaft.

[0011] The outer side of the winding wheel is also provided with a second annular groove, and the free end of the spiral spring is fixed to the winding wheel at the second annular groove.

[0012] In order to protect the spiral spring, a limit block is provided at the upper end of the second rotating shaft, and a protective cylinder is provided outside the spiral spring, with its free end passing through the protective cylinder.

[0013] In order to record the displacement of the top plate, a second shell is provided at the bottom of the first shell, and a potentiometer is provided in the second shell corresponding to the rope wheel. The first rotating shaft passes through the first shell and is connected to the potentiometer.

[0014] The movable fixing method between the wire rope and the moving block is that the moving block has a threaded hole perpendicular to the wire rope, and the wire rope is pressed and fixed by a clamping bolt passing through the threaded hole.

[0015] To facilitate adjustment of the clamping bolts, the vertical steel wire rope on the mounting sleeve is provided with adjustment holes.

[0016] The catheter assembly is specifically designed as follows: the catheter assembly includes a catheter body, and an adjusting cylinder is fixedly connected to one end of the catheter body near the first housing. A connecting pipe is connected to one end of the adjusting cylinder via an internal thread, and the connecting pipe is fixedly connected to the mounting sleeve.

[0017] To facilitate the insertion of the catheter assembly into the channel to be monitored, a guide head is connected to the end of the catheter body away from the first housing, and the end of the guide head away from the catheter body is set in a frustum shape.

[0018] To facilitate fixing to the area to be tested, both the snap-fit ​​connector and the outer end face of the guide head are provided with multiple snap-fit ​​claws.

[0019] The beneficial effects of this utility model are as follows: This utility model is a roof displacement monitoring instrument. Unlike the prior art, in this solution, the movable block inside the mounting sleeve is fixed to the wire rope. The rotating wheel assembly inside the first housing is connected to the movable block via a pull rope. When the roof displacement occurs, the wire rope drives the winding wheel to rotate through the connecting block and the pull rope, converting the displacement of the wire rope into the rotation of the winding wheel. The rotation of the winding wheel is monitored by a potentiometer, thereby reflecting the displacement of the roof and improving the accuracy of the measurement. At this time, the spiral spring is driven to wind around the winding wheel, and the spring force can be used to apply tension to the winding wheel, thereby ensuring that the movable block always applies a stable tension force to the wire rope. This structure can effectively avoid... The system prevents wire rope slackness, ensuring the wire rope remains taut at all times, significantly improving the accuracy of measurement data and reducing measurement errors caused by wire rope slack. The modular design of the mounting sleeve and guide tube assembly makes the installation process of the monitor simpler and faster. The moving block, with its clamping bolts securing the wire rope and the adjustable holes, allows operators to quickly adjust the installation status of the wire rope according to actual conditions. The independent design of each component also facilitates later inspection and replacement, reducing maintenance costs and difficulty. Furthermore, the adjustable cylinder design allows the guide tube body to move, facilitating the movement of the entire device after the clamping connector is fixed to the test area, further ensuring the tension of the wire rope. Attached Figure Description

[0020] The advantages and features of this application will become clear to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this invention.

[0021] In the attached diagram:

[0022] Figure 1 This is an exploded view of the overall structure of this project;

[0023] Figure 2 for Figure 1 Partial structural view;

[0024] Figure 3 This is a front view of the overall structure of this plan;

[0025] Figure 4 This is a cross-sectional view along direction A;

[0026] The components represented by the various reference numerals in the diagram are:

[0027] 1. First housing; 2. Mounting sleeve; 3. Conduit assembly; 31. Conduit body; 32. Adjusting cylinder; 33. Connecting pipe; 34. Guide head; 4. Winding wheel; 5. Wire rope; 6. Clamping connector; 7. Moving block; 8. Rotary wheel assembly; 81. First rotating shaft; 82. Rope winding wheel; 83. First annular groove; 84. Second annular groove; 9. Pull rope; 10. Spiral spring; 11. Second rotating shaft; 12. Limiting block; 13. Protective cylinder; 14. Second housing; 15. Potentiometer; 16. Threaded hole; 17. Clamping bolt; 18. Adjusting hole; 19. Clamping claw. Detailed Implementation

[0028] Exemplary embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings.

[0029] Example

[0030] As mentioned in the background section, roof displacement monitoring is necessary during mining operations to ensure project safety. However, existing roof displacement monitoring instruments have certain drawbacks, such as insufficient tension in the wire rope, which can loosen after displacement, affecting measurement results and posing safety hazards. Therefore, the inventors have improved the existing monitoring instruments to reduce the loosening of the wire rope during displacement and improve the accuracy of the test structure. The following is a detailed explanation with reference to the illustrations.

[0031] This embodiment discloses a roof displacement monitoring instrument, which aims to solve the problem of large measurement errors caused by insufficient tension of the wire rope 5 in the prior art. Through the coordinated design of various components, high-precision and stable roof displacement monitoring is achieved.

[0032] Specifically, in combination Figure 1 and Figure 3 The system includes a first housing 1, which is rectangular in shape and possesses good impact resistance and corrosion resistance, making it suitable for complex and harsh underground engineering environments such as mines and tunnels. A mounting sleeve 2, which is hollow, is fixedly welded to one side of the first housing 1. A conduit assembly 3 is installed on the side of the mounting sleeve 2 away from the first housing 1. The front end of the mounting sleeve 2 is cylindrical to facilitate the insertion of the conduit assembly 3, and the two are fixed together by bolts. This connection method facilitates disassembly and replacement, and reduces the need for future maintenance.

[0033] In this embodiment, the conduit assembly 3 includes a conduit body 31. An adjusting cylinder 32 is fixedly connected to one end of the conduit body 31 near the first housing 1. One end of the adjusting cylinder 32 is connected to a connecting pipe 33 via an internal thread. The connecting pipe 33 has no external thread at its end, and its outer diameter is larger than the external thread portion, which can limit the movement of the adjusting cylinder 32. The cylindrical portion at the front end of the mounting sleeve 2 can be inserted into the connecting pipe 33, and the two are fixed together with bolts. Through the threaded connection between the adjusting cylinder 32 and the connecting pipe 33, the length of the conduit assembly 3 can be adjusted according to actual installation requirements, allowing the monitor to adapt to different installation environments. A guide head 34 is connected to the end of the conduit body 31 away from the first housing 1. This end of the guide head 34 is shaped like a frustum, which facilitates insertion of the guide head 34 into the anchoring hole of the top plate, providing good guidance.

[0034] Based on the above structure, a winding wheel 4 is provided on the outer side of the first housing 1 away from the mounting sleeve 2. The winding wheel 4 is made of engineering plastic and has an anti-slip texture on its surface to effectively prevent the wire rope 5 from slipping on the winding wheel 4. Multiple strands of wire rope 5 are wound on the winding wheel 4. Specifically, multiple rope grooves can be opened side by side on the winding wheel 4. These wire ropes 5 are all made of high-strength stainless steel, which has high tensile strength and wear resistance. The multiple strands of wire rope 5 pass through the first housing 1, the mounting sleeve 2, and the guide tube assembly 3 in sequence, and are connected to a clamping connector 6 at the end. The clamping connector 6 is used to connect to the anchor point of the top plate, so as to obtain the displacement information of the top plate in real time.

[0035] It should be noted that, in combination Figure 1 The steel wire rope 5 passes through the connecting pipe 33, the adjusting pipe and the conduit body 31 of the conduit assembly 3 in sequence and connects to the clamping connector 6. In this scheme, the clamping connector 6 and the guide head 34 are provided with multiple clamping claws 19 on their outer end faces. The clamping claws 19 are barbed. When the clamping connector 6 and the guide head 34 are connected to the top plate anchoring point, the clamping claws 19 can tightly clamp the anchoring point, further enhancing the firmness of the connection.

[0036] In this embodiment, a movable block 7 is provided inside the mounting sleeve 2 for each steel wire rope 5. The movable block 7 is parallel to the length of the steel wire rope 5, and each steel wire rope 5 passes through and is fixed to the corresponding movable block 7. The steel wire rope 5 can slide along the length of the movable block 7. The fixing method involves a threaded hole 16 perpendicular to the steel wire rope 5 on the movable block 7. Multiple threaded holes 16 can be provided, and a clamping bolt 17 passes through the threaded holes 16 to clamp and fix the steel wire rope 5. This fixing method is simple to operate and ensures the stability of the connection between the steel wire rope 5 and the movable block 7. Simultaneously, an adjustment hole 18 is provided perpendicular to the steel wire rope 5 on the mounting sleeve 2. The clamping bolt 17 can be adjusted by the adjustment hole 18 to complete the fixing and unfixing of the steel wire rope 5 and the movable block 7. When the movable block 7 moves with the steel wire rope 5 to the position closest to the first housing 1 on the mounting sleeve 2, the adjustment hole 18 and the threaded hole 16 are vertically aligned.

[0037] Meanwhile, within the first housing 1, a rotating wheel assembly 8 is rotatably mounted for each moving block 7. A pull rope 9 is wound around the rotating wheel assembly 8 and fixed to the moving block 7. The rotating wheel assembly 8 includes a first rotating shaft 81 rotatably connected to the first housing 1 via a bearing. A rope-winding wheel 82 is connected to the outer edge of the first rotating shaft 81 via a key. The rope-winding wheel 82 has a first annular groove 83 for winding the pull rope 9. The pull rope 9 is embedded in the first annular groove 83, effectively preventing the pull rope 9 from shifting on the rope-winding wheel 82. After the clamping joint 6 is fixed to the anchor point and the clamping bolt 17 fixes the wire rope 5 to the connecting block, if the top plate shifts, the wire rope 5 drives the connecting block to move, which in turn drives the rope-winding wheel 82 to rotate via the pull rope 9. By monitoring the rotation of the rope-winding wheel 82, the movement distance of the wire rope 5 is reflected, thereby achieving numerical monitoring of the top plate displacement.

[0038] In this design, to detect the rotation of the rope-winding wheel 82, a second housing 14 is bolted to the bottom of the first housing 1. A potentiometer 15 is installed inside the second housing 14 corresponding to the rope-winding wheel 82. A first rotating shaft 81 passes through the first housing 1 and is connected to the potentiometer 15. When the rope-winding wheel 82 rotates, it drives the first rotating shaft 81 to rotate, thereby changing the resistance of the potentiometer 15. This converts the rotation angle of the rope-winding wheel 82 into an electrical signal output. By analyzing and processing the electrical signal, the displacement of the top plate can be accurately obtained. The connection between the potentiometer 15 and the first rotating shaft 81, as well as the detection of its rotation, are existing technologies and will not be elaborated upon in this design.

[0039] The main design feature of this solution is, in combination with Figure 4The first housing 1 contains multiple spiral springs 10 and a second rotating shaft 11 corresponding to the rope winding wheel 82. The spiral springs 10 are mounted on the outer edge of the second rotating shaft 11, and a limit block 12 is provided at their upper end to prevent axial movement of the second rotating shaft 11 during rotation. A second annular groove 84 is also provided on the outside of the rope winding wheel 82, and the free end of the spiral spring 10 is fixed to the rope winding wheel 82 at the second annular groove 84, specifically by bolts. When the rope winding wheel 82 is stationary, the spiral spring 10 is in a contracted state. A protective cylinder 13 is provided outside the spiral spring 10. The protective cylinder 13 is made of engineering plastic, and its free end passes through the protective cylinder 13. The protective cylinder 13 effectively prevents external dust, moisture, etc., from entering, providing good protection for the spiral spring 10. When the top plate is displaced, the wire rope 5 drives the moving block 7 to move, the moving block 7 pulls the pull rope 9, and the pull rope 9 drives the winding wheel 82 to rotate. At this time, the spiral spring 10 undergoes elastic deformation and coils inward toward the second annular groove 84. The elastic force of the spiral spring 10 is used to always apply tension to the pull rope 9, thereby ensuring that the wire rope 5 is in a taut state.

[0040] In actual installation and use, the conduit assembly 3 is first installed on the first housing 1 through the installation sleeve 2. According to the specific conditions of the roof, the clamping connector 6 and the guide head 34 are then connected to the anchoring point of the roof. The clamping claw 19 is used to clamp the anchoring point, and the wire rope 5 is fixed to the connecting block through the clamping bolt 17. The overall downward movement is adjusted by the adjusting cylinder 32 to tighten the wire rope 5. After installation, when the roof is displaced, the wire rope 5 drives the moving block 7 to move. The moving block 7 pulls the pull rope 9, and the pull rope 9 drives the winding wheel 82 to rotate. The rotation of the winding wheel 82 causes the spiral spring 10 to undergo elastic deformation. The elastic force of the spiral spring 10 ensures that the wire rope 5 is always in a taut state. At the same time, the rotation of the winding wheel 82 drives the first rotating shaft 81 to rotate. The rotation of the first rotating shaft 81 causes the potentiometer 15 to output an electrical signal. By analyzing and processing the electrical signal, the displacement of the roof can be obtained in real time and accurately, providing reliable data support for engineering safety monitoring.

Claims

1. A roof displacement monitor, characterised in that, It includes a first housing (1) and a mounting sleeve (2) is provided on one side of the housing. A conduit assembly (3) is installed on the side of the mounting sleeve (2) away from the first housing (1). A winding wheel (4) is provided on the outer side of the first housing (1) away from the mounting sleeve (2), and multiple strands of steel wire rope (5) are wound around the winding wheel (4). The multiple strands of steel wire rope (5) pass through the first housing (1), the mounting sleeve (2) and the guide assembly (3) in sequence and are connected to the clamping connector (6). The mounting sleeve (2) is provided with multiple moving blocks (7) corresponding to the steel wire rope (5), and the steel wire rope (5) passes through the moving blocks (7) and can be fixed thereto. The first housing (1) is provided with multiple rotating wheel assemblies (8) corresponding to the moving blocks (7), and the rotating wheel assemblies (8) are wound with pull ropes (9), and the pull ropes (9) pass through the mounting sleeve (2) and are connected to the moving blocks (7).

2. A roof displacement monitor according to claim 1, characterised in that The rotating wheel assembly (8) includes a first rotating shaft (81) rotatably connected to the first housing (1), and a rope winding wheel (82) is connected to the outer edge of the first rotating shaft (81). The rope winding wheel (82) has a first annular groove (83) for winding the pull rope (9).

3. A roof displacement monitor according to claim 2, characterised in that The first housing (1) is provided with a plurality of spiral springs (10) and a second rotating shaft (11) corresponding to the rope wheel (82), and the spiral springs (10) are installed on the outer edge of the second rotating shaft (11); The outer side of the winding wheel (82) is provided with a second annular groove (84), and the free end of the spiral spring (10) is fixed to the winding wheel (82) at the second annular groove (84).

4. A roof displacement monitor according to claim 3, characterised in that The second rotating shaft (11) is provided with a limit block (12) at its upper end, and a protective cylinder (13) is provided outside the spiral spring (10), with its free end passing through the protective cylinder (13).

5. A roof displacement monitor according to claim 2, wherein, The bottom of the first housing (1) is provided with a second housing (14), and a potentiometer (15) is provided in the second housing (14) corresponding to the winding wheel (82). The first rotating shaft (81) passes through the first housing (1) and is connected to the potentiometer (15).

6. A roof displacement monitor according to claim 1, characterised in that The moving block (7) has a threaded hole (16) on the vertical wire rope (5), and the wire rope (5) is pressed and fixed by passing a clamping bolt (17) through the threaded hole (16).

7. A roof displacement monitor according to claim 6, characterised in that The vertical steel wire rope (5) on the mounting sleeve (2) has an adjustment hole (18).

8. A roof displacement monitor according to claim 1, characterised in that The catheter assembly (3) includes a catheter body (31), and an adjusting cylinder (32) is fixedly connected to one end of the catheter body (31) near the first housing (1), and a connecting pipe (33) is connected to one end of the adjusting cylinder (32) through an internal thread, and the connecting pipe (33) is fixedly connected to the mounting sleeve (2).

9. A roof displacement monitor according to claim 8, characterised in that, The guide head (34) is connected to one end of the catheter body (31) away from the first housing (1), and the end of the guide head (34) away from the catheter body (31) is set in a frustum shape.

10. A roof displacement monitor according to claim 9, wherein, Both the snap-fit ​​connector (6) and the guide head (34) have multiple snap-fit ​​claws (19) on their outer end faces.

Images