Special square tenon pulling device for coal mining machine

Abstract

The invention belongs to the technical field of coal mining machines, and particularly relates to a special device for pulling a square tenon of a coal mining machine, the special device comprises a convex hollow shell, a planet head square tenon to be pulled up and a planet head gland, an electric hydraulic rod is fixedly embedded in the outer wall of a convex part of the convex hollow shell, and the moving end of the electric hydraulic rod is fixedly connected with a first sealing piston block. According to the device, stress is uniform in the pulling-out process of the planet head gland and the planet head square tenon, the operation process is simple, convenient and labor-saving, the labor intensity of workers is reduced, the use safety of the device special for pulling the square tenon of the coal mining machine can be effectively improved through assistance of the potentiometer type displacement sensor, and the practicability is high. In addition, the special device for pulling out the square tenon of the coal mining machine further has the function of reducing the frictional resistance when the planet head gland and the planet head square tenon are pulled out, the convenience of pulling out the planet head gland and the planet head square tenon is improved, meanwhile, the use reliability of the special device for pulling out the square tenon of the coal mining machine is improved, the service life of the special device is prolonged, and the maintenance efficiency of the coal mining machine is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mining machines, and in particular relates to a special device for extracting square blades from coal mining machines. Background Art

[0002] Due to the poor transportation environment and production requirements of the coal mining face, after a coal mining machine fails, it is generally difficult to lift the entire machine to the surface for maintenance under normal conditions. Most of the time, the machine needs to be stopped underground for inspection. Among coal mining machine failures, wear and leakage of floating oil seals and damage to the bevel teeth of the planetary mechanism are relatively common. When such failures occur, it is generally necessary to remove the coal mining machine drum and then remove the planetary head gear for replacement. Professional tools are required in the process of removing the planetary head gear. For example, patent authorization announcement number CN203791951U discloses a special tool for pulling out coal mining machine gears.

[0003] At present, there are the following problems in the use of special tools for coal mining machine:

[0004] First, the positions of the hydraulic jack and the screw used for connection need to be adjusted. After the adjustment, the two have to be manually assembled by the staff, which makes the extraction steps of the planetary head square falcon and the planetary head gland extremely cumbersome, seriously affecting the convenience of the extraction operation, which not only increases the labor intensity of the staff, but also slows down the maintenance efficiency of the coal mining machine;

[0005] Second, when the planetary head jack and the planetary head gland are pulled out by two hydraulic jacks, it is difficult to achieve synchronous lifting of the lifting ends of the two hydraulic jacks, which will cause uneven force on the planetary head jack and the planetary head gland during the pulling out process. The uneven force will cause them to tilt in the direction of less force, which will easily cause the planetary head jack and the planetary head gland to get stuck in the installation holes. This situation increases the difficulty of pulling out the planetary head jack and the planetary head gland, reduces the reliability of the tool use, and also has a negative impact on the convenience of pulling out the planetary head jack and the maintenance efficiency of the coal mining machine.

[0006] Therefore, we propose a special device for extracting square falcons from coal mining machines to solve the above problems. Summary of the invention

[0007] The purpose of the present invention is to provide a special device for extracting square falcons from coal mining machines in view of the above problems.

[0008] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a special device for pulling out square grommets of a coal mining machine, comprising a convex hollow shell and a planetary head square grommets and a planetary head gland to be pulled out, an electric hydraulic rod is fixedly embedded in the outer wall of the raised portion of the convex hollow shell, a first sealing piston block is fixedly connected to the movable end of the electric hydraulic rod, an outer wall of the first sealing piston block is sealingly and movably connected to the inner wall of the raised portion of the convex hollow shell, the interior of the convex hollow shell is filled with a hydraulic oil layer, and an air assist mechanism is fixedly embedded in the bottom end of the convex hollow shell;

[0009] The outer wall of the convex hollow shell is fixedly connected with a control panel and a PLC controller;

[0010] A plurality of telescopic rods are fixedly connected to the lower surface of the convex hollow shell, and a hollow bar is fixedly connected to the side of the plurality of telescopic rods away from the convex hollow shell. A rectangular movable through hole is opened on the outer wall of the hollow bar, and a pull-out mechanism is movably connected to the hole wall of the rectangular movable through hole;

[0011] The outer wall of the hollow bar is fixedly sleeved with a connecting frame, the inner wall of the connecting frame is fixedly connected with a first pulling mechanism, the outer walls of both side ends of the hollow bar are fixedly connected with second pulling mechanisms, and the top ends of the first pulling mechanism and the two second pulling mechanisms are fixedly connected with the outer wall of the bottom end of the convex hollow shell;

[0012] A potentiometer-type displacement sensor is fixedly connected to the outer wall of one of the telescopic rods, and a movable end of the potentiometer-type displacement sensor is fixedly connected to the outer wall of the second pulling mechanism.

[0013] In the above-mentioned special device for pulling out square falcons for coal mining machines, the air-assisted mechanism includes an air cylinder fixedly connected to a convex hollow shell, a through hole is opened on a side of the air cylinder close to the first sealing piston block, and the hole wall of the through hole is movably connected with a T-shaped rod, the side end of the T-shaped rod is fixedly connected with a second sealing piston block, the outer wall of the second sealing piston block is sealingly and movably connected with the inner wall of the air cylinder, the end of the air cylinder away from the T-shaped rod is fixedly connected with a first air-guiding one-way valve and a second air-guiding one-way valve, the bottom end of the first air-guiding one-way valve is fixedly connected with a three-way pipe, the two air outlet ends of the three-way pipe are fixedly connected with connecting air pipes, the air inlet end of the second air-guiding one-way valve is fixedly connected with an air inlet pipe, the outer wall of the convex hollow shell is fixedly connected with a micro air pump, and the air outlet end of the micro air pump is fixedly connected with the air inlet end of the air inlet pipe.

[0014] In the above-mentioned special device for extracting square falcons from coal mining machines, the rod wall of the T-shaped rod is fixedly sleeved with a rubber barrier sleeve, the bottom end of the rubber barrier sleeve is fixedly connected to the outer wall of the air cylinder, and the air inlet end of the micro air pump is interference-fitted with an activated carbon filter.

[0015] In the above-mentioned special device for pulling out the square bolts of a coal mining machine, the pulling-out mechanism includes two movable covers movably connected to the inner wall of the hollow bar, the inner wall of the movable cover is fixedly connected with a threaded barrel, the inner wall of the threaded barrel is threadedly connected with a threaded rod, both ends of the threaded rod are fixedly connected with threaded protrusions, the threads of the threaded protrusions match the threads of the fastening holes in the planetary head square bolts and the planetary head pressure cover, the threaded rod and the two threaded protrusions are jointly provided with an air guide hole, and the air outlet ends of the two connecting air pipes are respectively sealed and sleeved with the threaded protrusions on the top of the two threaded rods through pipe clamps.

[0016] In the above-mentioned special device for pulling out square falcons of a coal mining machine, the first pulling mechanism includes a first hollow cylinder, a T-shaped pressure rod is movably connected to the side end hole wall of the first hollow cylinder, a third sealing piston block is fixedly connected to the top end of the T-shaped pressure rod, the outer wall of the third sealing piston block is sealingly and movably connected to the inner wall of the first hollow cylinder, one end of the first hollow cylinder away from the T-shaped pressure rod is fixedly connected to a first electromagnetic control valve, the inlet end of the first electromagnetic control valve is fixedly connected to a first oil pipe, and the liquid inlet of the first oil pipe is fixedly connected to the outer wall of the convex hollow shell.

[0017] In the above-mentioned special device for pulling out square falcons of a coal mining machine, the second pulling mechanism includes a fixed ring fixedly connected to the side end of the hollow bar, the inner wall of the fixed ring is fixedly connected to the second hollow cylinder, the side end hole wall of the second hollow cylinder is movably connected to a moving rod, the end of the moving rod away from the second hollow cylinder is connected to a deflection block through a rolling bearing, the end of the moving rod away from the deflection block is fixedly connected to a fourth sealing piston block, the outer wall of the fourth sealing piston block is sealingly and movably connected to the inner wall of the second hollow cylinder, the end of the second hollow cylinder away from the moving rod is fixedly connected to a second electromagnetic control valve, the liquid inlet end of the second electromagnetic control valve is fixedly connected to a second oil pipe, and the liquid inlet end of the second oil pipe is fixedly connected to the outer wall of the convex hollow shell.

[0018] In the above-mentioned special device for extracting square falcons of coal mining machines, the rod walls of the T-shaped pressure rod and the two movable rods are sleeved with reset auxiliary springs.

[0019] In the above-mentioned special device for extracting square falcons from coal mining machines, two symmetrically distributed control handles are fixedly connected to the outer wall of the side end of the convex hollow shell close to the electric hydraulic rod.

[0020] In the above-mentioned special device for extracting square falcons of coal mining machines, the side end rod wall of the threaded rod is sleeved with a thin sealing rubber sleeve, and the threaded protrusions on both sides of the threaded rod are an integrally formed structure with the threaded rod.

[0021] Compared with the existing technology, the advantages of a special device for extracting square falcons from coal mining machines are:

[0022] 1. By setting the electric hydraulic rod, hydraulic oil layer, pulling out mechanism, first pulling out mechanism and second pulling out mechanism, firstly, the outer planetary head gland is pulled out through the pulling out mechanism, second pulling out mechanism, electric hydraulic rod, first sealing piston block and hydraulic oil layer. During the pulling out process of the planetary head gland, the moving rods of the two second pulling out mechanisms extend by the same amount, which can ensure that the planetary head gland is subjected to uniform force when it is pulled out, and avoid the planetary head gland from tilting and getting stuck. Then, the planetary head is pulled out through the pulling out mechanism, first pulling out mechanism, electric hydraulic rod, first sealing piston block and hydraulic oil layer. When the planetary head gland is pulled out, the two threaded rods of the pulling out mechanism will also act at the same time, ensuring that the planetary head gland is subjected to uniform force during the pulling out process. This mechanism makes the planetary head gland and the planetary head gland subjected to uniform force during the pulling out process, and the operation process is simple and labor-saving, which can effectively improve the convenience of the pulling out work, while reducing the labor intensity of the staff and improving the efficiency of coal mining machine maintenance.

[0023] 2. By setting up a potentiometer displacement sensor, as the planetary head pressure cover and the planetary head square are pulled out by the pull-out mechanism, the clamping area of ​​the side wall of the planetary head pressure cover and the planetary head square is reduced, thereby reducing the resistance to pulling out the planetary head pressure cover and the planetary head square. At the same time, the detection end of the potentiometer displacement sensor is pushed back by the fixing ring at the side end of the hollow bar, and the potentiometer displacement sensor generates a corresponding displacement electrical signal. The PLC controller controls the extension speed of the moving end of the electric hydraulic rod to reduce according to the displacement electrical signal, and then controls the pull-out force of the pull-out mechanism by reducing the extension speed of the moving rod or the T-shaped pressure rod, so as to avoid the situation where the pull-out force of the pull-out mechanism is too large at the moment of pulling out the planetary head pressure cover and the planetary head square, causing the device to push back and injure the staff. Moreover, as the pull-out force of the pull-out mechanism gradually decreases, the pull-out load of the special device for pulling out the coal mining machine square can be reduced, thereby reducing the wear between the structural components of the device. The mechanism can effectively improve the safety of the use of the special device for pulling out the coal mining machine square, and can improve the service life of the special device for pulling out the coal mining machine square.

[0024] 3. Through the air-assisted mechanism, when the pulling mechanism pulls out the planetary head gland and the planetary head square, the PLC controller also controls the micro air pump to start, and the air-assisted mechanism can deliver clean airflow to the air guide hole. Before the planetary head gland and the planetary head square are pulled out, the airflow ejected through the air guide hole can clean the coal powder impurities near the planetary head gland and the planetary head square, avoiding the accumulation of coal powder impurities and interfering with the pulling out operation of the planetary head gland and the planetary head square. In addition, when the planetary head gland and the planetary head square are pulled out, the air-assisted mechanism can deliver high-pressure clean air to the connecting gap inside the planetary head gland and the planetary head square. Under the action of air pressure, the gas molecules in the clean air are squeezed into the connection gap between the planetary head gland and the planetary head square to form an air film layer, and the air film layer is used to reduce the friction resistance of the planetary head gland and the planetary head square when they are pulled out. In addition, the high-pressure clean air will also form a reverse thrust on the inside of the planetary head gland and the planetary head square. This reverse thrust can increase the speed at which the planetary head gland and the planetary head square are pulled out, so that the special device for pulling out the square of the coal mining machine has the function of reducing the friction resistance when the planetary head gland and the planetary head square are pulled out, which can effectively improve the convenience of pulling out the planetary head gland and the planetary head square, and at the same time improve the reliability of the use of the special device for pulling out the square of the coal mining machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a special device for extracting square falcons from a coal mining machine provided by the present invention;

[0026] Figure 2 It is a structural schematic diagram of a partial cross-section of a special device for extracting square falcons from a coal mining machine provided by the present invention;

[0027] Figure 3 It is a structural schematic diagram of an air assist mechanism in a special device for extracting square falcons from a coal mining machine provided by the present invention;

[0028] Figure 4 It is a structural schematic diagram of a pulling mechanism in a special device for pulling out square falcons of a coal mining machine provided by the present invention;

[0029] Figure 5 It is a structural schematic diagram of the hollow bar portion of a special device for extracting square falcons from a coal mining machine provided by the present invention;

[0030] Figure 6 It is a structural schematic diagram of a threaded rod part in a special device for extracting square falcons of a coal mining machine provided by the present invention;

[0031] Figure 7 It is a structural schematic diagram of a first pulling mechanism in a special device for pulling out square falcons of a coal mining machine provided by the present invention;

[0032] Figure 8 It is a structural schematic diagram of a second pulling mechanism in a special device for pulling square falcons of a coal mining machine provided by the present invention.

[0033] In the figure: 1 convex hollow shell, 2 planetary head square falcon, 3 planetary head pressure cover, 4 electric hydraulic rod, 5 air auxiliary mechanism, 51 air cylinder, 52 T-shaped rod, 53 second sealing piston block, 54 first air guide check valve, 55 second air guide check valve, 56 three-way pipe, 57 connecting air pipe, 58 air intake pipe, 59 micro air pump, 6 pull-out mechanism, 61 moving cover, 62 threaded cylinder, 63 threaded rod, 64 threaded protrusion, 65 air guide through hole, 7 first pull-out mechanism, 71 first hollow cylinder, 72 T-shaped pressure rod, 73 third sealing piston block, 74 first electromagnetic control valve, 75 first oil pipe, 8 second pulling mechanism, 81 fixing ring, 82 second hollow cylinder, 83 moving rod, 84 deflection block, 85 fourth sealing piston block, 86 second electromagnetic control valve, 87 second oil pipe, 9 rubber barrier sleeve, 10 first sealing piston block, 11 hydraulic oil layer, 12 control panel, 13 PLC controller, 14 telescopic rod, 15 hollow bar, 16 rectangular moving through hole, 17 connecting frame, 18 potentiometer displacement sensor, 19 activated carbon filter, 20 reset auxiliary spring, 21 control handle, 22 sealing rubber sleeve. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0035] like Figure 1-Figure 8As shown, a special device for pulling out square grommets of a coal mining machine comprises a convex hollow shell 1, a planetary head square grommets 2 to be pulled out and a planetary head pressure cover 3, an electric hydraulic rod 4 is fixedly embedded in the outer wall of the raised portion of the convex hollow shell 1, and two symmetrically distributed control handles 21 are fixedly connected to the outer wall of the side end of the convex hollow shell 1 close to the electric hydraulic rod 4, and the control handles 21 can facilitate the stability of the control device during operation, and a first sealing piston block 10 is fixedly connected to the movable end of the electric hydraulic rod 4, and the outer wall of the first sealing piston block 10 is sealingly and movably connected to the inner wall of the raised portion of the convex hollow shell 1, and the interior of the convex hollow shell 1 is filled with a hydraulic oil layer 11, and an air-assisting mechanism 5 is fixedly embedded at the bottom end of the convex hollow shell 1, and the air-assisting mechanism 5 comprises an air cylinder 51 fixedly connected to the convex hollow shell 1, and a through hole is opened on one side of the air cylinder 51 close to the first sealing piston block 10, and a T-shaped rod 52 is movably connected to the hole wall of the through hole, and a second sealing piston block 53 is fixedly connected to the side end of the T-shaped rod 52, and the outer wall of the second sealing piston block 53 The inner wall of the air cylinder 51 is sealed and movably connected. One end of the air cylinder 51 away from the T-shaped rod 52 is fixedly connected to a first air-guiding one-way valve 54 and a second air-guiding one-way valve 55. The bottom end of the first air-guiding one-way valve 54 is fixedly connected to a three-way pipe 56. Both air outlet ends of the three-way pipe 56 are fixedly connected to a connecting air pipe 57. The air inlet end of the second air-guiding one-way valve 55 is fixedly connected to an air inlet pipe 58. The outer wall of the convex hollow shell 1 is fixedly connected to a micro air pump 59. The air outlet end of the micro air pump 59 is connected to the air inlet pipe 58. The air inlet end of 8 is fixedly connected, the rod wall of the T-shaped rod 52 is fixedly sleeved with a rubber barrier sleeve 9, the bottom end of the rubber barrier sleeve 9 is fixedly connected to the outer wall of the air cylinder 51, and the air inlet end of the micro air pump 59 is interference fit sleeved with an activated carbon filter 19. This mechanism enables the special device for pulling out the planetary head pressure cover 3 and the planetary head pressure cover 2 when being pulled out, which can effectively improve the convenience of pulling out the planetary head pressure cover 3 and the planetary head pressure cover 2, thereby improving the efficiency of coal mining machine maintenance.

[0036] The outer wall of the convex hollow shell 1 is fixedly connected to a control panel 12 and a PLC controller 13, the lower surface of the convex hollow shell 1 is fixedly connected to a plurality of telescopic rods 14, the plurality of telescopic rods 14 are fixedly connected to a hollow bar 15 on one side away from the convex hollow shell 1, the outer wall of the hollow bar 15 is provided with a rectangular movable through hole 16, the hole wall of the rectangular movable through hole 16 is movably connected to a pull-out mechanism 6, the pull-out mechanism 6 includes two movable covers 61 movably connected to the inner wall of the hollow bar 15, the inner wall of the movable cover 61 is fixedly connected to a threaded cylinder 62, the inner wall of the threaded cylinder 62 is threadedly connected to a threaded rod 63, the side end rod wall of the threaded rod 63 is sleeved with a sealing rubber thin sleeve 22, the threaded rod 6 The threaded protrusions 64 on both sides of 3 are an integrally formed structure with the threaded rod 63, and the sealing rubber thin sleeve 22 can improve the sealing performance of the connection between the threaded rod 63 and the planetary head gland 3 or the planetary head square 2. Both ends of the threaded rod 63 are fixedly connected with threaded protrusions 64, and the threads of the threaded protrusions 64 match the threads of the fastening holes in the planetary head square 2 and the planetary head gland 3. The threaded rod 63 and the two threaded protrusions 64 are jointly provided with an air guide hole 65, and the air outlet ends of the two connecting air pipes 57 are respectively sealed and sleeved with the threaded protrusions 64 on the top of the two threaded rods 63 through pipe clamps. This mechanism can ensure the uniformity of force when the planetary head square 2 and the planetary head gland 3 are pulled out.

[0037] The outer wall of the hollow bar 15 is fixedly sleeved with a connecting frame 17, and the inner wall of the connecting frame 17 is fixedly connected with a first pulling-up mechanism 7, and the first pulling-up mechanism 7 includes a first hollow cylinder 71, and the side end hole wall of the first hollow cylinder 71 is movably connected with a T-shaped pressure rod 72, and the top of the T-shaped pressure rod 72 is fixedly connected with a third sealing piston block 73, and the outer wall of the third sealing piston block 73 is sealingly and movably connected to the inner wall of the first hollow cylinder 71, and the end of the first hollow cylinder 71 away from the T-shaped pressure rod 72 is fixedly connected with a first electromagnetic control valve 74, and the inlet end of the first electromagnetic control valve 74 is fixedly connected with a first oil pipe 75, and the liquid inlet of the first oil pipe 75 is fixedly connected with the outer wall of the convex hollow shell 1. This mechanism cooperates with the pulling-out mechanism 6 to conveniently pull out the planetary head square falcon 2.

[0038] The outer walls of both side ends of the hollow bar 15 are fixedly connected with the second pulling mechanism 8, the top ends of the first pulling mechanism 7 and the two second pulling mechanisms 8 are fixedly connected with the outer wall of the bottom end of the convex hollow shell 1, the second pulling mechanism 8 includes a fixing ring 81 fixedly connected to the side end of the hollow bar 15, the inner wall of the fixing ring 81 is fixedly connected with the second hollow cylinder 82, the side end hole wall of the second hollow cylinder 82 is movably connected with a moving rod 83, and the end of the moving rod 83 away from the second hollow cylinder 82 is connected with a deflection block 84 through a rolling bearing The end of the moving rod 83 away from the deflection block 84 is fixedly connected to the fourth sealing piston block 85, the outer wall of the fourth sealing piston block 85 is sealingly and movably connected to the inner wall of the second hollow cylinder 82, the end of the second hollow cylinder 82 away from the moving rod 83 is fixedly connected to the second electromagnetic control valve 86, the liquid inlet end of the second electromagnetic control valve 86 is fixedly connected to the second oil pipe 87, the liquid inlet end of the second oil pipe 87 is fixedly connected to the outer wall of the convex hollow shell 1, and this mechanism cooperates with the pulling-out mechanism 6 to conveniently pull out the planetary head cover 3.

[0039] A potentiometer-type displacement sensor 18 is fixedly connected to the outer wall of one of the telescopic rods 14, and the movable end of the potentiometer-type displacement sensor 18 is fixedly connected to the outer wall of the second pulling mechanism 8. The rod walls of the T-shaped pressure rod 72 and the two moving rods 83 are both sleeved with a reset auxiliary spring 20. The reset auxiliary spring 20 stores energy when squeezed and can assist the retraction of the moving rod 83 and the T-shaped pressure rod 72.

[0040] The electric hydraulic rod 4, the micro air pump 59, the first electromagnetic control valve 74 and the second electromagnetic control valve 86 are all electrically connected to the output end of the PLC controller 13 through wires, and the potentiometer displacement sensor 18 and the control panel 12 are all electrically connected to the input end of the PLC controller 13 through wires. The electrical connections and power-on devices are all prior arts and are well known to those skilled in the art, and will not be repeated here.

[0041] The operating principle of the present invention is now described as follows: when the planetary head cover 3 and the planetary head square 2 need to be disassembled during the maintenance process of the coal mining machine, the fastening bolts used to fix the planetary head cover 3 and the planetary head square 2 are first removed, and because the planetary head cover 3 is installed on the outside of the planetary head square 2, the planetary head cover 3 needs to be pulled out first. At this time, the staff moves the special device for pulling out the square of the coal mining machine to the maintenance station through the control handle 21, and adjusts the position of the two threaded rods 63 of the pulling-out mechanism 6 through the rectangular moving through hole 16 on the hollow bar 15, that is, it is achieved by moving the moving cover 61 in the hollow bar 15, so that the threaded protrusions 64 of the two threaded rods 63 of the pulling-out mechanism 6 are respectively aligned with the two threaded protrusions 64 of the planetary head cover 3 that are located in a straight line. A fastening threaded hole, and then the threaded rod 63 is rotated by a tool, the threaded rod 63 is adjusted in position through the threaded barrel 62, and the threaded protrusion 64 at the side end of the threaded rod 63 is screwed into the fastening threaded hole of the planetary head cover 3, and then the staff rotates the deflection block 84 to make the deflection block 84 close to the planetary head square falcon 2, and then the staff sends a control electrical signal to the PLC controller 13 through the control panel 12, and the PLC controller 13 starts the electric hydraulic rod 4 and the two second electromagnetic control valves 86 according to the control electrical signal. Specifically, the electric hydraulic rod 4 pushes the first sealing piston block 10, and the first sealing piston block 10 pushes the hydraulic oil layer 11 inside the convex hollow shell 1, and the hydraulic oil passes through the opened two second electric The magnetic control valve 86 enters the two second hollow cylinders 82. At this time, according to the principle of communicating vessels, the amount of hydraulic oil entering the two second hollow cylinders 82 is consistent, and then the extension amount of the moving rod 83 pushed by the hydraulic oil and the fourth sealing piston block 85 in the second hollow cylinder 82 is consistent, thereby ensuring that the planetary head pressure cover 3 is subjected to balanced force during the process of the pulling-out mechanism 6 pulling out the planetary head pressure cover 3, and will not cause the planetary head pressure cover 3 to have a tendency to tilt and get stuck, thereby ensuring the convenience of the planetary head pressure cover 3 pulling out process. In addition, after the moving rod 83 is extended, the deflection block 84 is first contacted with the outer side of the planetary head square falcon 2, providing a pulling-out fulcrum for the process of the special device for pulling out the square falcon of the coal mining machine to pull out the planetary head pressure cover 3. As the moving rod 83 continues to extend outward, the two second pulling mechanisms 8 push back The force acts on the hollow bar 15, so that the hollow bar 15 drives the threaded rod 63 of the pulling mechanism 6 to move outward, and the threaded rod 63 pulls out the planetary head gland 3 outward through the threaded protrusion 64. After the planetary head gland 3 is pulled out, the control panel 12 and the PLC controller 13 control the electric hydraulic rod 4 to drive the first sealing piston block 10 to retract. At the same time, under the cooperation of the retraction negative pressure of the first sealing piston block 10 and the reset auxiliary spring 20, the moving rod 83 retracts and pushes the hydraulic oil in the second hollow cylinder 82 to return to the convex hollow shell 1. When the hydraulic oil in the second hollow cylinder 82 is completely discharged, the two second electromagnetic control valves 86 are controlled to close through the control panel 12 and the PLC controller 13, and the planetary head gland 3 is removed from the threaded protrusion 64 at the same time;

[0042] Then, when pulling out the planetary head 2, the steps of pulling out the planetary head 2 are similar to those of pulling out the planetary head gland 3. First, the positions of the two threaded rods 63 of the pulling-out mechanism 6 are adjusted through the rectangular movable through-holes 16 on the hollow bar 15, so that the threaded protrusions 64 of the two threaded rods 63 of the pulling-out mechanism 6 are respectively aligned with the two fastening threaded holes in a straight line in the planetary head 2, and then the threaded protrusions 64 of the threaded rods 63 are screwed into the fastening threaded holes of the planetary head 2. Then, the staff sends a control electrical signal to the PLC controller 13 through the control panel 12, and the PLC The controller 13 starts the electric hydraulic rod 4 and the first electromagnetic control valve 74 according to the control electrical signal. Specifically, when the moving end of the electric hydraulic rod 4 moves, the hydraulic oil of the hydraulic oil layer 11 enters the first hollow cylinder 71 through the first sealing piston block 10, and then the hydraulic oil pushes the third sealing piston block 73 and the T-shaped pressure rod 72 in the first hollow cylinder 71 to extend outward, so that the T-shaped pressure rod 72 enters the hole for installing the planetary head pressure cover 3 of the coal mining machine, and contacts with the coal mining machine shell, providing a pulling fulcrum for the process of pulling out the planetary head pressure cover 2 of the coal mining machine special device. As the T-shaped pressure rod 72 continues to extend, the first pulling mechanism 7 can provide a reverse force to the hollow bar 15, so that the hollow bar 15 drives the two threaded rods 63 of the pulling mechanism 6 to pull out the planetary head square falcon 2 at the same time, thereby ensuring that the force is balanced during the planetary head gland 3 extraction process, and will not cause the planetary head square falcon 2 to have a tendency to tilt and get stuck, thereby ensuring the convenience of the planetary head gland 3 extraction process. In addition, after the planetary head square falcon 2 is extracted, the control panel 12 and the PLC controller 13 control the electric hydraulic rod 4 to drive the first sealing piston block 10 to retract. At the same time, the negative pressure of the first sealing piston block 10 retracts and the reset auxiliary spring With the cooperation of the spring 20, the T-shaped pressure rod 72 retracts and pushes the hydraulic oil in the first hollow cylinder 71 back to the convex hollow shell 1. When the hydraulic oil in the first hollow cylinder 71 is completely discharged, the first electromagnetic control valve 74 is controlled to close through the control panel 12 and the PLC controller 13, and the planetary head square falcon 2 is removed from the threaded protrusion 64. This mechanism makes the planetary head gland 3 and the planetary head square falcon 2 evenly stressed during the extraction process, and the operation process is simple and labor-saving, which can effectively improve the convenience of the extraction work, reduce the labor intensity of the staff, and improve the efficiency of coal mining machine maintenance;

[0043] In addition, as the planetary head cover 3 and the planetary head square 2 are pulled out by the pulling mechanism 6, the clamping area of ​​the side walls of the planetary head cover 3 and the planetary head square 2 is reduced, thereby reducing the resistance to the pulling out of the planetary head cover 3 and the planetary head square 2. At the same time, the detection end of the potentiometer displacement sensor 18 is pushed back by the fixing ring 81 at the side end of the hollow bar 15, and the potentiometer displacement sensor 18 generates a corresponding displacement electrical signal, and the potentiometer displacement sensor 18 transmits the displacement electrical signal to the PLC controller 13, and the PLC controller The controller 13 controls the extension speed of the moving end of the electric hydraulic rod 4, and then controls the extraction force of the extraction mechanism 6 by reducing the extension speed of the moving rod 83 or the T-shaped pressure rod 72, so as to avoid the situation that the extraction force of the extraction mechanism 6 is too large at the moment of extraction of the planetary head gland 3 and the planetary head square 2, causing the device to push back and injure the staff. In addition, as the extraction force of the extraction mechanism 6 gradually decreases, the extraction load of the special device for extracting square ferrules of the coal mining machine can be reduced, thereby reducing the wear between the structural components of the device and increasing the service life of the special device for extracting square ferrules of the coal mining machine.

[0044] When the pulling mechanism 6 pulls out the planetary head gland 3 and the planetary head square 2, the PLC controller 13 also controls the micro air pump 59 to start, and the micro air pump 59 purifies the sucked air through the activated carbon filter 19, and then the clean air is transported to the air cylinder 51 through the air inlet pipe 58 and the second air guide one-way valve 55, and the air in the air cylinder 51 is then transported to the air guide hole 65 of the threaded rod 63 through the first air guide one-way valve 54, the three-way pipe 56 and the connecting air pipe 57, and the planetary head gland 3 and the planetary head square 2 are connected. Before the planetary head gland 3 and the planetary head square 2 are pulled out, the airflow ejected through the air guide hole 65 can clean the coal dust impurities near the planetary head gland 3 and the planetary head square 2, so as to prevent the coal dust impurities from accumulating and interfering with the pulling out operation of the planetary head gland 3 and the planetary head square 2. In addition, when the planetary head gland 3 and the planetary head square 2 are pulled out, the first sealing piston block 10 is pushed by the electric hydraulic rod 4 and squeezes the T-shaped rod 52, and the T-shaped rod 52 pushes the second sealing piston block 53 to move in the air cylinder 51, so that the clean air in the air cylinder 51 is quickly discharged. The high-pressure clean air is discharged through the first air guide one-way valve 54, the three-way pipe 56, the connecting air pipe 57 and the air guide hole 65, and finally the high-pressure clean air is discharged into the connecting gap between the planetary head gland 3 and the planetary head square 2. Due to the air pressure, the gas molecules in the clean air are squeezed into the connecting gap between the planetary head gland 3 and the planetary head square 2, and an air film layer is formed at the connecting gap between the planetary head gland 3 and the planetary head square 2 as much as possible, and the friction resistance of the planetary head gland 3 and the planetary head square 2 to be pulled out is reduced by the air film layer. Moreover, the high-pressure clean air will also form a reverse thrust on the inner side of the planetary head pressure cover 3 and the planetary head square 2, which can increase the speed of pulling out the planetary head pressure cover 3 and the planetary head square 2. This mechanism enables the special device for pulling out the coal mining machine to reduce the friction resistance when the planetary head pressure cover 3 and the planetary head square 2 are pulled out, which can effectively improve the convenience of pulling out the planetary head pressure cover 3 and the planetary head square 2, and at the same time improve the reliability of the use of the special device for pulling out the coal mining machine, thereby improving the efficiency of coal mining machine maintenance.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A special device for pulling out a square horn of a coal mining machine, comprising a convex hollow shell (1) and a planetary head square horn (2) and a planetary head gland (3) to be pulled out, characterized in that: An electric hydraulic rod (4) is fixedly embedded in the outer wall of the raised portion of the convex hollow shell (1); a first sealing piston block (10) is fixedly connected to the movable end of the electric hydraulic rod (4); the outer wall of the first sealing piston block (10) is sealingly and movably connected to the inner wall of the raised portion of the convex hollow shell (1); the interior of the convex hollow shell (1) is filled with a hydraulic oil layer (11); and an air assist mechanism (5) is fixedly embedded in the bottom end of the convex hollow shell (1); The outer wall of the convex hollow shell (1) is fixedly connected with a control panel (12) and a PLC controller (13); A plurality of telescopic rods (14) are fixedly connected to the lower surface of the convex hollow shell (1); a hollow bar (15) is fixedly connected to the side of the plurality of telescopic rods (14) away from the convex hollow shell (1); a rectangular movable through hole (16) is formed on the outer wall of the hollow bar (15); a pull-out mechanism (6) is movably connected to the hole wall of the rectangular movable through hole (16); The outer wall of the hollow bar (15) is fixedly sleeved with a connecting frame (17), the inner wall of the connecting frame (17) is fixedly connected with a first pulling mechanism (7), the outer walls of both side ends of the hollow bar (15) are fixedly connected with second pulling mechanisms (8), and the top ends of the first pulling mechanism (7) and the two second pulling mechanisms (8) are fixedly connected to the outer wall of the bottom end of the convex hollow shell (1); A potentiometer-type displacement sensor (18) is fixedly connected to the outer wall of one of the telescopic rods (14), and a movable end of the potentiometer-type displacement sensor (18) is fixedly connected to the outer wall of the second pulling mechanism (8).

2. A special device for extracting square falcons from a coal mining machine according to claim 1, characterized in that: The air assist mechanism (5) comprises an air cylinder (51) fixedly connected to the convex hollow shell (1), a through hole is provided on a side of the air cylinder (51) close to the first sealing piston block (10), and a T-shaped rod (52) is movably connected to the hole wall of the through hole, a second sealing piston block (53) is fixedly connected to the side end of the T-shaped rod (52), an outer wall of the second sealing piston block (53) is sealingly movably connected to the inner wall of the air cylinder (51), and an end of the air cylinder (51) away from the T-shaped rod (52) is fixedly connected to the inner wall of the air cylinder (51). A first air-guiding one-way valve (54) and a second air-guiding one-way valve (55), wherein the bottom end of the first air-guiding one-way valve (54) is fixedly connected to a three-way pipe (56), and both air outlet ends of the three-way pipe (56) are fixedly connected to a connecting air pipe (57), and the air inlet end of the second air-guiding one-way valve (55) is fixedly connected to an air inlet pipe (58), and the outer wall of the convex hollow shell (1) is fixedly connected to a micro air pump (59), and the air outlet end of the micro air pump (59) is fixedly connected to the air inlet end of the air inlet pipe (58).

3. A special device for extracting square falcons from a coal mining machine according to claim 2, characterized in that: The rod wall of the T-shaped rod (52) is fixedly sleeved with a rubber barrier sleeve (9), the bottom end of the rubber barrier sleeve (9) is fixedly connected to the outer wall of the air cylinder (51), and the air inlet end of the micro air pump (59) is sleeved with an activated carbon filter (19) in an interference fit.

4. A special device for extracting square falcons from a coal mining machine according to claim 2, characterized in that: The pulling mechanism (6) comprises two movable covers (61) movably connected to the inner wall of the hollow bar (15); the inner wall of the movable cover (61) is fixedly connected with a threaded tube (62); the inner wall of the threaded tube (62) is threadedly connected with a threaded rod (63); both ends of the threaded rod (63) are fixedly connected with threaded protrusions (64); the threads of the threaded protrusions (64) match the threads of the fastening holes in the planetary head square (2) and the planetary head pressure cover (3); the threaded rod (63) and the two threaded protrusions (64) are jointly provided with an air guide hole (65); the air outlet ends of the two connecting air pipes (57) are respectively sealed and sleeved with the threaded protrusions (64) at the tops of the two threaded rods (63) through pipe clamps.

5. A special device for extracting square falcons from a coal mining machine according to claim 1, characterized in that: The first pulling mechanism (7) comprises a first hollow cylinder (71), a T-shaped pressure rod (72) being movably connected to the side end hole wall of the first hollow cylinder (71), a third sealing piston block (73) being fixedly connected to the top end of the T-shaped pressure rod (72), an outer wall of the third sealing piston block (73) being sealingly movably connected to the inner wall of the first hollow cylinder (71), an end of the first hollow cylinder (71) away from the T-shaped pressure rod (72) being fixedly connected to a first electromagnetic control valve (74), an inlet end of the first electromagnetic control valve (74) being fixedly connected to a first oil pipe (75), and a liquid inlet of the first oil pipe (75) being fixedly connected to the outer wall of the convex hollow shell (1).

6. A special device for extracting square falcons from a coal mining machine according to claim 5, characterized in that: The second pulling mechanism (8) comprises a fixing ring (81) fixedly connected to the side end of the hollow bar (15); the inner wall of the fixing ring (81) is fixedly connected to the second hollow cylinder (82); the side end hole wall of the second hollow cylinder (82) is movably connected to a moving rod (83); the end of the moving rod (83) away from the second hollow cylinder (82) is connected to a deflection block (84) through a rolling bearing; the end of the moving rod (83) away from the deflection block (84) is fixedly connected to a fourth sealing piston block (85); the outer wall of the fourth sealing piston block (85) is sealingly and movably connected to the inner wall of the second hollow cylinder (82); the end of the second hollow cylinder (82) away from the moving rod (83) is fixedly connected to a second electromagnetic control valve (86); the liquid inlet end of the second electromagnetic control valve (86) is fixedly connected to a second oil pipe (87); the liquid inlet end of the second oil pipe (87) is fixedly connected to the outer wall of the convex hollow shell (1).

7. A special device for extracting square falcons from a coal mining machine according to claim 6, characterized in that: The rod walls of the T-shaped pressure rod (72) and the two moving rods (83) are sleeved with a return auxiliary spring (20).

8. A special device for extracting square falcons from a coal mining machine according to claim 1, characterized in that: Two symmetrically distributed control handles (21) are fixedly connected to the outer wall of the side end of the convex hollow shell (1) close to the electric hydraulic rod (4).

9. A special device for extracting square falcons from a coal mining machine according to claim 4, characterized in that: The side end rod wall of the threaded rod (63) is sleeved with a sealing rubber thin sleeve (22), and the threaded protrusions (64) on both sides of the threaded rod (63) and the threaded rod (63) are an integrally formed structure.

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