Shearer traction cable protection device

Abstract

The utility model relates to the field of coal fully mechanized mining technology especially relates to coal winning machine traction cable protection device, including the casing, still including the fixed mounting of the casing periphery multiple sets of connecting plate, the upper end of casing is provided with the apron, and the apron realizes detachable fixed connection through the fastener and connecting plate, and the both ends of casing are provided with threading port, and the two groups of tensioning mechanisms are symmetrically arranged in the cavity of casing, and the two groups of tensioning mechanisms are respectively located in the inside of two threading ports, the utility model forms the closed protection structure with the casing through apron and connecting plate fixed connection, effectively prevent the cable from being squeezed or crushed by coal accumulation, and the detachable design of apron is convenient for the inspection and maintenance of the inside of casing, when the traction cable appears slack, the tensioning mechanism can automatically compensate the slack amount, when the cable is in the tensioned state, the tensioning mechanism can provide the necessary extension space for the cable and avoid excessive stretching, effectively prevent the abrasion damage between the cable and casing.

Description

Technical Field

[0001] This utility model relates to the field of coal mining technology, and in particular to a protection device for the traction cable of a coal mining machine. Background Technology

[0002] As the core equipment of fully mechanized mining face, the power source and control signal transmission of the coal mining machine rely entirely on the traction cable. When the coal mining machine travels back and forth on the working face, which is hundreds of meters long, its traction cable is often crushed by the accumulated coal blocks or hit by falling gangue, causing production delays. It is time-consuming and laborious to deal with. Therefore, protective devices are generally installed at vulnerable locations of the cable on site.

[0003] Traditional cable protection devices mostly use fixed, enclosed housings, which make maintenance procedures cumbersome, time-consuming, and labor-intensive, seriously affecting the efficiency of coal mining operations. Furthermore, during the operation of the coal mining machine, the tension of the cable changes constantly with its position, and traditional fixed protection devices cannot respond to the slack or over-tightening state of the cable, which may lead to wear between the cable and the protection device.

[0004] Therefore, to address the above issues, a protective device for the traction cable of a coal mining machine can be designed. This device adopts a split-shell structure, which facilitates internal inspection and maintenance. At the same time, the shell integrates an adaptive tensioning mechanism, which can dynamically compensate for cable expansion and contraction, always maintaining the cable in a safe tensioned state and preventing wear between the cable and the shell. Utility Model Content

[0005] In order to overcome the problems that traditional cable protection devices mostly use fixed enclosed shells, the maintenance process is cumbersome, time-consuming and labor-intensive, which seriously affects the efficiency of coal mining operations and cannot effectively respond to the state of cable slack or excessive tightness, which may cause wear and tear between the cable and the protection device.

[0006] The technical solution of this utility model is as follows: a traction cable protection device for a coal mining machine, including a housing and multiple sets of connecting plates fixedly installed on the periphery of the housing. A cover plate is provided at the upper end of the housing, and the cover plate is detachably fixedly connected to the connecting plates by fasteners. Cable passages are provided at both ends of the housing. Two sets of tensioning mechanisms are symmetrically arranged in the inner cavity of the housing. The two sets of tensioning mechanisms are located inside the two sets of cable passages respectively. The tensioning mechanism includes a first spring fixedly installed inside the housing. A mounting bracket is fixedly installed at the upper end of the first spring. A guide groove for slidingly connecting the mounting bracket to the housing is provided inside the housing. A tensioning roller is rotatably connected inside the mounting bracket. An installation assembly is provided at the lower end of the housing.

[0007] Preferably, by setting a cable pass-through port, the cable can pass through the housing. After being fixedly connected by a cover plate and a connecting plate, it forms a closed protective structure with the housing, effectively preventing the cable from being crushed by coal piles or damaged by falling gangue. When the cable is run through the housing, it passes over the top of the two sets of tension rollers. When the traction cable becomes slack, the elastic potential energy of the first spring will drive the mounting frame to slide along the guide groove, causing the tension rollers to apply a clamping force towards the cable, thereby automatically compensating for the slack. When the cable is in a tensioned state, the reaction force of the cable on the tension rollers will overcome the elastic force of the first spring, pushing the mounting frame to slide in the opposite direction along the guide groove, providing the necessary extension space for the cable and avoiding excessive stretching, ensuring that the cable always maintains a safe tensioned state during dynamic operation, and effectively preventing wear and damage between the cable and the housing.

[0008] Preferably, the buffer assembly includes two sets of slide rods fixedly installed inside the housing. The slide rods are located between two sets of tensioning mechanisms. A mounting seat is slidably connected to the periphery of the slide rods. A second spring is fixedly installed between the mounting seat and the inner wall of the housing, forming an axial buffer structure.

[0009] Preferably, the buffer assembly includes a rotating shaft rotatably connected inside the mounting base, and rollers are fixedly mounted on the periphery of the rotating shaft.

[0010] Preferably, the contact surface between the roller and the cable is an arc-shaped groove.

[0011] Preferably, the mounting assembly includes a connecting rod fixedly connected to the periphery of the housing, a mounting sleeve is slidably sleeved on the periphery of the connecting rod, and a fixing plate is fixedly mounted on one end of the mounting sleeve.

[0012] Preferably, multiple sets of threaded springs are fixedly installed at the other end of the mounting sleeve, and locking nuts are connected to the outer threads of the threaded springs.

[0013] Preferably, multiple sets of threaded springs are evenly arranged circumferentially around the axis of the mounting sleeve, and each set of threaded springs has an anti-slip pad on its inner side.

[0014] The beneficial effects of this utility model are: 1. The entire device can be securely installed on a suitable position outside the coal mining machine by using the fixing plate. The position of the housing is adjusted by the sliding characteristics of the connecting rod in the mounting sleeve. After the position is confirmed, the threaded spring is tightened by the locking nut, so that the anti-slip pad and the surface of the connecting rod are frictionally locked, so as to achieve precise adjustment of the housing position and ensure that the cable can pass through the housing smoothly. After the cable passes through the housing through the cable hole, the cover plate is fixed on the top of the housing by fasteners and connecting plates to form a closed protective structure, which effectively prevents coal blocks from accumulating and squeezing or gangue from falling and damaging the cable. The detachable design of the cover plate facilitates the inspection and maintenance of the inside of the housing. 2. When the cable is threaded through the housing, it passes over the top of the two sets of tension rollers. When the traction cable becomes slack, the elastic potential energy of the first spring will drive the mounting bracket to slide along the guide groove, causing the tension rollers to apply a clamping force towards the cable, thereby automatically compensating for the slack. When the cable is in a taut state, the reaction force of the cable on the tension rollers will overcome the elastic force of the first spring, pushing the mounting bracket to slide in the opposite direction along the guide groove, providing the necessary extension space for the cable and avoiding excessive stretching, ensuring that the cable always maintains a safe tension state during dynamic operation, and effectively preventing wear and damage between the cable and the housing. Attached Figure Description

[0015] Figure 1 The diagram shown is a first three-dimensional structural schematic of the coal mining machine traction cable protection device of this utility model. Figure 2 The diagram shown is a second three-dimensional structural schematic of the coal mining machine traction cable protection device of this utility model; Figure 3 The diagram shown is a three-dimensional structural representation of the internal structure of the protective device for the traction cable of a coal mining machine according to this utility model. Figure 4 The diagram shown is an exploded three-dimensional structural diagram of the installation component of the coal mining machine traction cable protection device of this utility model. Explanation of reference numerals in the attached drawings: 1. Housing; 101. Connecting plate; 102. Cable entry port; 2. Cover plate; 301. Mounting bracket; 302. Tensioning roller; 303. Guide groove; 304. First spring; 401. Slide rod; 402. Mounting base; 403. Second spring; 404. Rotating shaft; 405. Roller; 501. Connecting rod; 502. Mounting sleeve; 503. Fixing plate; 504. Threaded spring; 505. Locking nut; 506. Anti-slip pad. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Please see Figure 1 and Figure 3This utility model provides an embodiment of a coal mining machine traction cable protection device, including a housing 1 and multiple sets of connecting plates 101 fixedly installed around the housing 1. A cover plate 2 is provided at the upper end of the housing 1, and the cover plate 2 is detachably fixedly connected to the connecting plates 101 by fasteners. Cable insertion ports 102 are provided at both ends of the housing 1. Two sets of tensioning mechanisms are symmetrically arranged inside the housing 1, located inside the two sets of cable insertion ports 102. Each tensioning mechanism includes a first spring 304 fixedly installed inside the housing 1, with a mounting bracket 301 fixedly installed at the upper end of the first spring 304. A guide groove 303 is provided inside the housing 1 for slidingly connecting the mounting bracket 301 to the housing 1. A tensioning roller 302 is rotatably connected inside the mounting bracket 301. An installation assembly is provided at the lower end of the housing 1. The cable insertion ports 102 are used to achieve this. 2. The cable can pass through the housing 1 and be fixedly connected to the connecting plate 101 via the cover plate 2 to form a closed protective structure with the housing 1. This effectively prevents the cable from being crushed by coal piles or damaged by falling gangue. When the cable passes through the housing 1, it passes over the upper end of the two sets of tension rollers 302. When the traction cable becomes slack, the elastic potential energy of the first spring 304 will drive the mounting frame 301 to slide along the guide groove 303, causing the tension rollers 302 to apply a clamping force towards the cable, thereby automatically compensating for the slack. When the cable is in a tensioned state, the reaction force of the cable on the tension rollers 302 will overcome the elastic force of the first spring 304, pushing the mounting frame 301 to slide in the opposite direction along the guide groove 303, providing the cable with the necessary extension space and avoiding excessive stretching. This ensures that the cable always maintains a safe tensioned state during dynamic operation, effectively preventing wear and damage between the cable and the housing 1.

[0018] Please see Figure 1 and Figure 3 In this embodiment, the buffer assembly includes two sets of slide rods 401 fixedly installed inside the housing 1. The slide rods 401 are located between two sets of tensioning mechanisms. A mounting base 402 is slidably connected to the periphery of the slide rods 401. A second spring 403 is fixedly installed between the mounting base 402 and the inner wall of the housing 1 to form an axial buffer structure. The buffer assembly includes a rotating shaft 404 rotatably connected inside the mounting base 402. A roller 405 is fixedly installed on the periphery of the rotating shaft 404. The contact surface between the roller 405 and the cable is an arc-shaped groove. By setting the roller 405, the cable can be supported. The arc-shaped groove can make the cable fit more closely with the roller 405, preventing the cable from accidentally coming off the roller 405. When the cable is subjected to lateral force, the mounting base 402 will slide along the slide rods 401, thereby compressing or stretching the second spring 403. The deformation of the second spring 403 can effectively absorb and buffer the impact energy, so that the instantaneous stress on the cable can be dispersed, avoiding stress concentration that causes excessive bending or flattening of the cable in some areas.

[0019] Please see Figure 2 and Figure 4In this embodiment, the mounting assembly includes a connecting rod 501 fixedly connected to the periphery of the housing 1. An mounting sleeve 502 is slidably sleeved on the periphery of the connecting rod 501. A fixing plate 503 is fixedly mounted on one end of the mounting sleeve 502, and multiple sets of threaded springs 504 are fixedly mounted on the other end of the mounting sleeve 502. A locking nut 505 is threadedly connected to the periphery of the threaded springs 504. The multiple sets of threaded springs 504 are evenly arranged circumferentially around the axis of the mounting sleeve 502. An anti-slip pad 506 is provided on the inner side of each set of threaded springs 504. The fixing plate 503 can be used to securely install the entire device at a suitable position on the outside of the coal mining machine. The position of the housing 1 is adjusted by utilizing the sliding characteristics of the connecting rod 501 in the mounting sleeve 502. After the position is confirmed, the locking nut 505 is used to press the threaded springs 504, so that the anti-slip pad 506 and the surface of the connecting rod 501 generate friction and lock, thereby achieving precise adjustment of the position of the housing 1 and ensuring that the cable passes smoothly through the housing 1.

[0020] During operation, the fixing plate 503 can securely install the entire device at a suitable position on the outside of the coal mining machine. The position of the housing 1 is adjusted by the sliding characteristics of the connecting rod 501 in the mounting sleeve 502. After the position is confirmed, the threaded spring 504 is pressed by the locking nut 505, so that the anti-slip pad 506 and the surface of the connecting rod 501 are frictionally locked, so as to achieve precise adjustment of the position of the housing 1 and ensure that the cable can pass through the housing 1 smoothly. The cable is then passed through the cable pass-through port 102 through the housing 1 and passes over the two sets of tension rollers 302. One section of the cable is located inside the groove of the roller 405. Then, the cover plate 2 is fixed above the housing 1 using fasteners and connecting plate 101 to form a closed protective structure, which effectively prevents coal blocks from accumulating and squeezing the cable or gangue from falling and hitting it. The detachable design of the cover plate 2 facilitates the inspection and maintenance of the inside of the housing 1. When the traction cable becomes slack, the elastic potential energy of the first spring 304 will drive the mounting bracket 301 to slide along the guide groove 303, causing the tension roller 302 to apply a clamping force towards the cable, thereby automatically compensating for the slack. When the cable is in a tensioned state, the reaction force of the cable on the tension roller 302 will overcome the elastic force of the first spring 304, pushing the mounting bracket 301 to slide in the opposite direction along the guide groove 303, providing the cable with the necessary extension space and avoiding excessive stretching, ensuring that the cable always maintains a safe tensioned state during dynamic operation, and effectively preventing wear damage between the cable and the housing 1. When the cable is subjected to lateral force, the mounting base 402 will slide along the slide bar 401, thereby compressing or stretching the second spring 403. The deformation of the second spring 403 can effectively absorb and buffer the impact energy, so that the instantaneous stress on the cable can be dispersed, avoiding stress concentration that could lead to excessive bending or flattening of the cable in some areas.

[0021] Through the above steps, after the cover plate 2 is fixedly connected to the connecting plate 101, it forms a closed protective structure with the shell 1, effectively preventing coal block accumulation from squeezing or gangue from falling and damaging the cable. The detachable design of the cover plate 2 facilitates inspection and maintenance of the inside of the shell 1. When the cable passes through the upper end of the two sets of tension rollers 302 inside the shell 1, when the traction cable becomes slack, the elastic potential energy of the first spring 304 will drive the mounting bracket 301 to slide along the guide groove 303, driving the tension rollers 302 to apply a clamping force towards the cable, thereby automatically compensating for the slack. When the cable is in a taut state, the cable... The reaction force on the tension roller 302 will overcome the elastic force of the first spring 304, pushing the mounting frame 301 to slide in the opposite direction along the guide groove 303, providing the cable with the necessary extension space and avoiding excessive stretching, ensuring that the cable always maintains a safe tension state during dynamic operation, and effectively preventing wear and damage between the cable and the housing 1; this solves the problem that traditional cable protection devices mostly use fixed closed housings 1, which have cumbersome maintenance procedures, are time-consuming and labor-intensive, seriously affect the efficiency of coal mining operations, and cannot effectively respond to the slack or over-tight state of the cable, which may cause wear between the cable and the protection device.

[0022] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A protection device for the traction cable of a coal mining machine, comprising a housing (1), characterized in that: It also includes multiple sets of connecting plates (101) fixedly installed on the periphery of the housing (1). A cover plate (2) is provided at the upper end of the housing (1). The cover plate (2) is detachably fixedly connected to the connecting plate (101) by fasteners. Threading ports (102) are provided at both ends of the housing (1). Two sets of tensioning mechanisms are symmetrically arranged in the inner cavity of the housing (1). The two sets of tensioning mechanisms are located inside the two sets of threading ports (102). The tensioning mechanism includes a first spring (304) fixedly installed inside the housing (1). A mounting bracket (301) is fixedly installed at the upper end of the first spring (304). A guide groove (303) for slidingly connecting the mounting bracket (301) and the housing (1) is provided inside the housing (1). A tensioning roller (302) is rotatably connected inside the mounting bracket (301). An installation component is provided at the lower end of the housing (1).

2. The coal mining machine traction cable protection device according to claim 1, characterized in that: It also includes a buffer assembly, which includes two sets of slide rods (401) fixedly installed inside the housing (1). The slide rods (401) are located between the two sets of tensioning mechanisms. The outer periphery of the slide rods (401) is slidably connected to the mounting base (402). A second spring (403) is fixedly installed between the mounting base (402) and the inner wall of the housing (1) to form an axial buffer structure.

3. The coal mining machine traction cable protection device according to claim 2, characterized in that: The buffer assembly includes a rotating shaft (404) rotatably connected inside the mounting base (402), and a roller (405) is fixedly mounted on the periphery of the rotating shaft (404).

4. The coal mining machine traction cable protection device according to claim 3, characterized in that: The contact surface between the roller (405) and the cable is an arc-shaped groove.

5. The coal mining machine traction cable protection device according to claim 1, characterized in that: The mounting assembly includes a connecting rod (501) fixedly connected to the periphery of the housing (1), and a mounting sleeve (502) is slidably sleeved on the periphery of the connecting rod (501). A fixing plate (503) is fixedly mounted on one end of the mounting sleeve (502).

6. The coal mining machine traction cable protection device according to claim 5, characterized in that: Multiple sets of threaded springs (504) are fixedly installed at the other end of the mounting sleeve (502), and a locking nut (505) is connected to the outer thread of the threaded spring (504).

7. The coal mining machine traction cable protection device according to claim 6, characterized in that: Multiple sets of threaded springs (504) are evenly arranged in a circle around the axis of the mounting sleeve (502), and each set of threaded springs (504) has an anti-slip pad (506) on its inner side.

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