A special device for pulling out a coal mining machine

Abstract

The present application belongs to the technical field of coal mining machine, especially relates to a special device for pulling out planet head square spool of coal mining machine, which comprises a convex hollow shell, a planet head square spool and a planet head gland to be pulled out, a convex part outer wall of the convex hollow shell is fixedly embedded with an electric hydraulic rod, and a moving end of the electric hydraulic rod is fixedly connected with a first sealing piston block. The present application makes the planet head gland and the planet head square spool pull out uniformly, and the operation process is simple and labor-saving, which reduces the labor intensity of the workers. The safety of the special device for pulling out planet head square spool of coal mining machine is effectively improved by the auxiliary electric potential sensor type displacement sensor. In addition, the special device for pulling out planet head square spool of coal mining machine also has the function of reducing the frictional resistance when the planet head gland and the planet head square spool are pulled out, which improves the convenience of pulling out the planet head gland and the planet head square spool, improves the reliability and service life of the special device for pulling out planet head square spool of coal mining machine, and improves the efficiency of the maintenance of the coal mining machine.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of coal mining machine, in particular to a special device for pulling out the planetary head of a coal mining machine. BACKGROUND

[0002] Due to the poor transportation environment and yield requirements of the coal mining face, it is difficult to lift the whole machine to the surface for maintenance under normal conditions after the coal mining machine fails, and it is mostly necessary to stop the machine for inspection underground. Among the faults of the coal mining machine, the phenomenon of wear and oil leakage of the floating oil seal and damage of the bevel gear of the planetary mechanism is relatively common. In the case of such faults, the drum of the coal mining machine needs to be removed, and then the planetary head can be replaced and processed. Professional tools are needed in the process of disassembling the planetary head, such as the special tool for pulling out the planetary head of a coal mining machine disclosed in the patent authorization announcement No. CN203791951U.

[0003] The special tool for pulling out the planetary head of the coal mining machine has the following problems in the process of use:

[0004] Firstly, the positions of the hydraulic jack and the screw rod for connection need to be adjusted, and after adjustment, the two need to be manually assembled by the staff, which makes the pulling out steps of the planetary head and the planetary head gland extremely tedious, seriously affecting the convenience of the pulling out operation, which not only increases the labor intensity of the staff, but also slows down the maintenance efficiency of the coal mining machine.

[0005] Secondly, when the planetary head 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 stress on the planetary head and the planetary head gland during the pulling out process. Uneven stress will make them tilt towards the direction with less stress, and further easily cause the planetary head and the planetary head gland to be stuck in the installation hole, which increases the difficulty of pulling out the planetary head and the planetary head gland, reduces the reliability of the tool use, and has a negative impact on the convenience of pulling out the planetary head and the maintenance efficiency of the coal mining machine.

[0006] Therefore, we propose a special device for pulling out the planetary head of a coal mining machine to solve the above problems. SUMMARY

[0007] The purpose of the present application is to provide a special device for pulling out the planetary head of a coal mining machine to solve the above problems.

[0008] In order to achieve the above object, the following technical scheme is adopted in the present application: A special device for pulling out the planetary head square spool of a coal mining machine, comprising a convex hollow shell, a planetary head square spool to be pulled out and a planetary head gland, a convex part outer wall of the convex hollow shell is fixedly embedded with an electric hydraulic rod, a moving end of the electric hydraulic rod is fixedly connected with a first sealing piston block, an outer wall of the first sealing piston block is sealingly and movably connected with an inner wall of the convex part of the convex hollow shell, an inside of the convex hollow shell is filled with a hydraulic oil layer, and a bottom end of the convex hollow shell is fixedly embedded with an air auxiliary mechanism.

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

[0010] A lower surface of the convex hollow shell is fixedly connected with a plurality of telescopic rods, a side of the plurality of telescopic rods away from the convex hollow shell is commonly fixedly connected with a hollow strip, an outer wall of the hollow strip is provided with a rectangular moving through hole, and a hole wall of the rectangular moving through hole is movably connected with a pulling-out mechanism.

[0011] An outer wall of the hollow strip is fixedly sleeved with a connecting frame, an inner wall of the connecting frame is fixedly connected with a first pulling-out mechanism, outer walls of both side ends of the hollow strip are fixedly connected with second pulling-out mechanisms, and top ends of the first pulling-out mechanism and the two second pulling-out mechanisms are fixedly communicated with an outer wall of the bottom end of the convex hollow shell.

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

[0013] In the special device for pulling out the planetary head square spool of the coal mining machine, the air auxiliary mechanism comprises an air cylinder fixedly connected with the convex hollow shell, a side of the air cylinder close to the first sealing piston block is provided with a through hole, a hole wall of the through hole is movably connected with a T-shaped rod, a side end of the T-shaped rod is fixedly connected with a second sealing piston block, an outer wall of the second sealing piston block is sealingly and movably connected with an inner wall of the air cylinder, an end of the air cylinder away from the T-shaped rod is fixedly communicated with a first air guide one-way valve and a second air guide one-way valve, a bottom end of the first air guide one-way valve is fixedly communicated with a three-way pipe, both air outlet ends of the three-way pipe are fixedly communicated with connecting air pipes, an air inlet end of the second air guide one-way valve is fixedly communicated with an air inlet pipe, an outer wall of the convex hollow shell is fixedly connected with a micro air pump, and an air outlet end of the micro air pump is fixedly communicated with an air inlet end of the air inlet pipe.

[0014] In the special device for pulling out the planetary head square spool of the coal mining machine, a rod wall of the T-shaped rod is fixedly sleeved with a rubber barrier sleeve, a bottom end of the rubber barrier sleeve is fixedly connected with an outer wall of the air cylinder, and an air inlet end of the micro air pump is interference-fitted with an active carbon filter.

[0015] In the special device for pulling out the square hole of the coal mining machine, the pulling-out mechanism comprises two movable covers movably connected with the inner walls of the hollow strips, the inner walls of the movable covers are fixedly connected with threaded cylinders, the inner walls of the threaded cylinders are threadedly connected with threaded rods, both ends of the threaded rods are fixedly connected with threaded protrusions, the threads of the threaded protrusions match the threads of the fastening holes in the planetary head square hole and the planetary head gland, the threaded rods and the two threaded protrusions are provided with a gas guide through hole, and the gas outlet ends of the two connecting gas pipes are respectively sealed and sleeved with the threaded protrusions at the top of the two threaded rods through pipe clamps.

[0016] In the special device for pulling out the square hole of the coal mining machine, the first pulling-out mechanism comprises a first hollow cylinder, a T-shaped pressing rod movably connected with the side end hole wall of the first hollow cylinder, a third sealing piston block fixedly connected with the top end of the T-shaped pressing rod, and a first electromagnetic control valve fixedly communicated with the end of the first hollow cylinder away from the T-shaped pressing rod.

[0017] In the special device for pulling out the square hole of the coal mining machine, the second pulling-out mechanism comprises a fixed ring fixedly connected with the side end of the hollow strip, a second hollow cylinder fixedly connected with the inner wall of the fixed ring, a movable rod movably connected with the side end hole wall of the second hollow cylinder, a deflection block connected with the end of the movable rod away from the second hollow cylinder through a rolling bearing, a fourth sealing piston block fixedly connected with the end of the movable rod away from the deflection block, and a second electromagnetic control valve fixedly communicated with the end of the second hollow cylinder away from the movable rod.

[0018] In the special device for pulling out the square hole of the coal mining machine, the rod walls of the T-shaped pressing rod and the two movable rods are sleeved with reset auxiliary springs.

[0019] In the special device for pulling out the square hole of the coal mining machine, the side end outer wall of the convex hollow shell close to the electric hydraulic rod is fixedly connected with two symmetrically distributed control handles.

[0020] In the special device for pulling out the square hole of the coal mining machine, the side end rod wall of the threaded rod is sleeved with a sealing rubber sleeve, and the threaded protrusions on both sides of the threaded rod are integrally formed with the threaded rod.

[0021] Compared with the prior art, the special device for pulling out the square hole of the coal mining machine has the following advantages:

[0022] 1、Through the setting of the electric hydraulic rod, hydraulic oil layer, pulling mechanism, first pulling mechanism and second pulling mechanism, first, through the pulling mechanism, second pulling mechanism, electric hydraulic rod, first sealing piston block and hydraulic oil layer, pull out the planetary head gland outside, in the process of pulling out the planetary head gland, the moving rod of the two second pulling mechanisms extends uniformly, which can ensure that the planetary head gland is pulled out uniformly, avoid the planetary head gland from tilting and being stuck, then through the pulling mechanism, first pulling mechanism, electric hydraulic rod, first sealing piston block and hydraulic oil layer, pull out the planetary head square spool, and the two threaded rods of the pulling mechanism will also act at the same time when the planetary head square spool is pulled out, ensuring that the planetary head square spool is pulled out uniformly, the mechanism makes the planetary head gland and the planetary head square spool pull out uniformly, and the operation process is simple and labor-saving, which can effectively improve the convenience of pulling out work, reduce the labor intensity of workers, and improve the efficiency of coal mining machine maintenance.

[0023] 2、Through the setting of the electric potential sensor, as the size of the planetary head gland and the planetary head square spool pulled out by the pulling mechanism increases, the clamping area of the side wall of the planetary head gland and the planetary head square spool decreases, thereby reducing the resistance of the planetary head gland and the planetary head square spool, at the same time, the detection end of the electric potential sensor is pushed back by the fixed ring of the hollow strip side end, the electric potential sensor generates a corresponding displacement electric signal, the PLC controller controls the speed of the moving end of the electric hydraulic rod to reduce, thereby controlling the pulling force of the pulling mechanism by reducing the extension speed of the moving rod or T-shaped pressure rod, avoiding the situation that the pulling force of the pulling mechanism is too large when the planetary head gland and the planetary head square spool are pulled out, causing the device to push back and damage the workers, and as the pulling force of the pulling mechanism gradually decreases, it can also reduce the pulling load of the coal mining machine square spool pulling special device, thereby reducing the wear and tear between the structural components of the device, the mechanism can effectively improve the safety of the coal mining machine square spool pulling special device, and can improve the service life of the coal mining machine square spool pulling special device.

[0024] 3. By setting the air auxiliary mechanism, when the pull-out mechanism pulls out the planetary head gland and the planetary head square spool, the PLC controller also controls the micro air pump to start, and the air auxiliary mechanism can transport clean airflow to the air guide hole. Before the planetary head gland and the planetary head square spool are pulled out, the airflow sprayed through the air guide hole can clean the coal powder impurities near the planetary head gland and the planetary head square spool, so as to avoid the accumulation of coal powder impurities to interfere with the pull-out operation of the planetary head gland and the planetary head square spool. In addition, when the planetary head gland and the planetary head square spool are pulled out, the air auxiliary mechanism can transport high-pressure clean air to the inside connection gap of the planetary head gland and the planetary head square spool. Due to the effect of air pressure, the gas molecules in the clean air are pressed into the connection gap of the planetary head gland and the planetary head square spool to form an air film layer. By using the air film layer, the frictional resistance of the planetary head gland and the planetary head square spool being pulled out is reduced. Moreover, the high-pressure clean air inside the planetary head gland and the planetary head square spool also forms a counter thrust. The counter thrust can improve the speed of pulling out the planetary head gland and the planetary head square spool, so that the coal mining machine square spool pulling device has the function of reducing the frictional resistance of the planetary head gland and the planetary head square spool being pulled out, and can effectively improve the convenience of pulling out the planetary head gland and the planetary head square spool, and improve the reliability of the coal mining machine square spool pulling device. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structural schematic diagram of a coal mining machine square spool pulling device provided by the present application;

[0026] Figure 2 is a structural schematic diagram of a coal mining machine square spool pulling device provided by the present application;

[0027] Figure 3 is a structural schematic diagram of an air auxiliary mechanism in a coal mining machine square spool pulling device provided by the present application;

[0028] Figure 4 is a structural schematic diagram of a pull-out mechanism in a coal mining machine square spool pulling device provided by the present application;

[0029] Figure 5 is a structural schematic diagram of a hollow strip part in a coal mining machine square spool pulling device provided by the present application;

[0030] Figure 6 is a structural schematic diagram of a threaded rod part in a coal mining machine square spool pulling device provided by the present application;

[0031] Figure 7 is a structural schematic diagram of a first pull-up mechanism in a coal mining machine square spool pulling device provided by the present application;

[0032] Figure 8 is a structural schematic diagram of a second pull-up mechanism in a coal mining machine square spool pulling device provided by the present application.

[0033] Figure: 1 convex shell, 2 planetary head square sparrow, 3 planetary head gland, 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 tee, 57 connecting air pipe, 58 air inlet 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-up 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 pull-up mechanism, 81 fixed 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 strip, 16 rectangular moving through hole, 17 connecting frame, 18 potentiometer type displacement sensor, 19 activated carbon filter, 20 reset auxiliary spring, 21 control handle, 22 sealing rubber sleeve. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0035] As Figures 1-8The special device for pulling out the planet head square spool of coal mining machine is characterized by comprising a convex hollow shell 1, a planet head square spool 2 and a planet head gland 3 to be pulled out, a protruding part outer wall of the convex hollow shell 1 is fixedly embedded with an electric hydraulic rod 4, two symmetrically distributed control handles 21 are fixedly connected to the side end outer wall of the convex hollow shell 1 close to the electric hydraulic rod 4, the control handles 21 can conveniently control the stability of the device during work, a first sealing piston block 10 is fixedly connected to the moving end of the electric hydraulic rod 4, the outer wall of the first sealing piston block 10 is sealingly and movably connected to the protruding part inner wall of the convex hollow shell 1, the inside of the convex hollow shell 1 is filled with a hydraulic oil layer 11, an air auxiliary mechanism 5 is fixedly embedded at the bottom end of the convex hollow shell 1, the air auxiliary mechanism 5 comprises a gas cylinder 51 fixedly connected to the convex hollow shell 1, a through hole is formed in the side of the gas cylinder 51 close to the first sealing piston block 10, 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, the outer wall of the second sealing piston block 53 is sealingly and movably connected to the inner wall of the gas cylinder 51, a first air guide one-way valve 54 and a second air guide one-way valve 55 are fixedly and communicatively connected to the end of the gas cylinder 51 away from the T-shaped rod 52, a three-way pipe 56 is fixedly and communicatively connected to the bottom end of the first air guide one-way valve 54, two gas outlet ends of the three-way pipe 56 are fixedly and communicatively connected with connecting air pipes 57, an air inlet end of the second air guide one-way valve 55 is fixedly and communicatively connected with an air inlet pipe 58, a micro air pump 59 is fixedly connected to the outer wall of the convex hollow shell 1, the air outlet end of the micro air pump 59 is fixedly and communicatively connected with the air inlet end of the air inlet pipe 58, a rubber barrier sleeve 9 is fixedly sleeved on the rod wall of the T-shaped rod 52, the bottom end of the rubber barrier sleeve 9 is fixedly connected with the outer wall of the gas cylinder 51, an activated carbon filter 19 is interference-fitted on the air inlet end of the micro air pump 59, the mechanism makes the special device for pulling out the planet head square spool of coal mining machine have the function of reducing the frictional resistance when the planet head square spool 2 and the planet head gland 3 are pulled out, can effectively improve the convenience of pulling out the planet head square spool 2 and the planet head gland 3, and further improve the efficiency of coal mining machine maintenance.

[0036] The outer wall of the convex shell 1 is fixedly connected with a control panel 12 and a PLC controller 13, the lower surface of the convex shell 1 is fixedly connected with a plurality of telescopic rods 14, the side away from the convex shell 1 of the plurality of telescopic rods 14 is fixedly connected with a hollow strip 15, the outer wall of the hollow strip 15 is provided with a rectangular moving through hole 16, the hole wall of the rectangular moving through hole 16 is movably connected with a pulling-out mechanism 6, the pulling-out mechanism 6 comprises two moving covers 61 movably connected with the inner wall of the hollow strip 15, the inner wall of the moving cover 61 is fixedly connected with a threaded cylinder 62, the inner wall of the threaded cylinder 62 is threadedly connected with a threaded rod 63, the side end rod wall of the threaded rod 63 is sleeved with a sealing rubber sleeve 22, the two side threaded protrusions 64 of the threaded rod 63 are integrally formed with the threaded rod 63, the sealing rubber sleeve 22 can improve the sealing performance of the connection between the threaded rod 63 and the planetary head square spool 2 or the planetary head gland 3, the two ends of the threaded rod 63 are fixedly connected with the threaded protrusions 64, the threads of the threaded protrusions 64 are matched with the threads of the fastening holes in the planetary head square spool 2 and the planetary head gland 3, the threaded rod 63 and the two threaded protrusions 64 are commonly provided with a gas guide through hole 65, the gas outlet ends of the two connecting gas pipes 57 are sealingly sleeved with the threaded protrusions 64 at the top of the two threaded rods 63 through pipe clamps, and the mechanism can ensure the uniformity of the force when the planetary head square spool 2 and the planetary head gland 3 are pulled out.

[0037] The outer wall of the hollow strip 15 is fixedly sleeved with a connecting frame 17, the inner wall of the connecting frame 17 is fixedly connected with a first pulling-out mechanism 7, the first pulling-out mechanism 7 comprises a first hollow cylinder 71, the side end hole wall of the first hollow cylinder 71 is movably connected with a T-shaped pressing rod 72, the top end of the T-shaped pressing rod 72 is fixedly connected with a third sealing piston block 73, the outer wall of the third sealing piston block 73 is sealingly movably connected with the inner wall of the first hollow cylinder 71, one end of the first hollow cylinder 71 away from the T-shaped pressing rod 72 is fixedly communicated with a first electromagnetic control valve 74, the inlet end of the first electromagnetic control valve 74 is fixedly communicated with a first oil pipe 75, the liquid inlet of the first oil pipe 75 is fixedly communicated with the outer wall of the convex shell 1, and the mechanism can conveniently pull out the planetary head square spool 2 in cooperation with the pulling-out mechanism 6.

[0038] The outer wall of the two side ends of the hollow strip 15 is fixedly connected with the second pulling mechanism 8, the top end of the first pulling mechanism 7 and the two second pulling mechanisms 8 is fixedly communicated with the bottom end outer wall of the convex hollow shell 1, the second pulling mechanism 8 comprises a fixed ring 81 fixedly connected with the side end of the hollow strip 15, the inner wall of the fixed ring 81 is fixedly connected with a second hollow cylinder 82, the side end hole wall of the second hollow cylinder 82 is movably connected with a moving rod 83, 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 with a fourth sealing piston block 85, the outer wall of the fourth sealing piston block 85 is sealingly movably connected with 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 communicated with a second electromagnetic control valve 86, the liquid inlet end of the second electromagnetic control valve 86 is fixedly communicated with a second oil pipe 87, the liquid inlet end of the second oil pipe 87 is fixedly communicated with the outer wall of the convex hollow shell 1, and the mechanism cooperates with the pulling mechanism 6 to conveniently pull out the planetary head gland 3.

[0039] The outer wall of one of the telescopic rods 14 is fixedly connected with a potentiometer type displacement sensor 18, the movable end of the potentiometer type displacement sensor 18 is fixedly connected with the outer wall of the second pulling mechanism 8, the rod wall of the T-shaped pressing rod 72 and the two moving rods 83 is sleeved with a reset auxiliary spring 20, the reset auxiliary spring 20 is energized when being pressed, and can assist the retraction of the moving rod 83 and the T-shaped pressing 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 electrically connected with the output end of the PLC controller 13 through wires, and the potentiometer type displacement sensor 18 and the control panel 12 are electrically connected with the input end of the PLC controller 13 through wires, the electrical connection and the power supply equipment are prior art, and belong to the public knowledge of those skilled in the art, and will not be repeated here.

[0041] The operation principle of the present application is described as follows: when the planetary head gland 3 and the planetary head square spool 2 need to be disassembled during the maintenance process of the coal mining machine, the fastening bolts for fixing the planetary head gland 3 and the planetary head square spool 2 are first disassembled, and since the planetary head gland 3 is installed on the outside of the planetary head square spool 2, the planetary head gland 3 needs to be pulled out first, at this time, the staff moves the coal mining machine pulling square spool special device to the maintenance station through the control handle 21, and adjusts the position of the two threaded rods 63 of the pulling mechanism 6 through the rectangular moving through hole 16 on the hollow strip 15, that is, the movement of the cover 61 in the hollow strip 15 is realized, so that the threaded protrusions 64 of the two threaded rods 63 of the pulling mechanism 6 are respectively aligned with the two fastening threaded holes in the planetary head gland 3 which are located on a straight line, then the threaded rod 63 is rotated through the tool, the position of the threaded rod 63 is adjusted through the threaded cylinder 62, and the threaded protrusions 64 at the side end of the threaded rod 63 are screwed into the fastening threaded holes of the planetary head gland 3, then the staff rotates the deflection block 84 again, so that the deflection block 84 is close to the planetary head square spool 2, then the staff sends a control electric signal to the PLC controller 13 through the operation 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 electric signal, specifically, the electric hydraulic rod 4 pushes the first sealing piston block 10, the first sealing piston block 10 pushes the hydraulic oil layer 11 inside the convex hollow shell 1, and the hydraulic oil enters the two second hollow cylinders 82 through the opened two second electromagnetic control valves 86, 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 moving rods 83 in the second hollow cylinders 82 are pushed out by the hydraulic oil and the fourth sealing piston block 85, so that the extension amount of the moving rods 83 is consistent, thereby ensuring that the planetary head gland 3 is balanced during the pulling out process of the pulling mechanism 6, and the planetary head gland 3 will not have the trend of tilting and being stuck, and the convenience of the pulling out process of the planetary head gland 3 is ensured, in addition, after the moving rods 83 are extended, the deflection block 84 first contacts the outside of the planetary head square spool 2, thereby providing a pulling out fulcrum for the coal mining machine pulling square spool special device to pull out the planetary head gland 3, as the moving rods 83 continue to extend outward, the two second pulling mechanisms 8 push the hollow strip 15 in the opposite direction, so that the hollow strip 15 drives the threaded rods 63 of the pulling mechanism 6 to move outward, the threaded rods 63 pull out the planetary head gland 3 through the threaded protrusions 64, after the planetary head gland 3 is pulled out, the electric hydraulic rod 4 drives the first sealing piston block 10 to retract through the operation panel 12 and the PLC controller 13, and under the cooperation of the negative pressure of the retraction of the first sealing piston block 10 and the reset auxiliary spring 20, the moving rods 83 retract and push the hydraulic oil in the second hollow cylinders 82 back to the convex hollow shell 1, when the hydraulic oil in the second hollow cylinders 82 is completely discharged, the two second electromagnetic control valves 86 are closed through the operation panel 12 and the PLC controller 13, and at the same time, the planetary head gland 3 is disassembled from the threaded protrusions 64.

[0042] Then, when the planet head square spool 2 is pulled out, the pulling-out step of the planet head square spool 2 is similar to the step of pulling out the planet head gland 3. First, the positions of the two threaded rods 63 of the pulling-out mechanism 6 are adjusted through the rectangular moving through hole 16 on the hollow strip 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 the planet head square spool 2 on a straight line, and then the threaded protrusions 64 of the threaded rods 63 are screwed into the fastening threaded holes of the planet head square spool 2. Then, the staff sends a control electric signal to the PLC controller 13 through the control panel 12, and the PLC controller 13 starts the electric hydraulic rod 4 and the first electromagnetic control valve 74 according to the control electric signal. Specifically, when the moving end of the electric hydraulic rod 4 moves, the hydraulic oil in 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 pressing rod 72 in the first hollow cylinder 71 to extend outward, so that the T-shaped pressing rod 72 enters the hole position of the coal mining machine for installing the planet head gland 3 and contacts the coal mining machine shell, providing a pulling-out fulcrum for the process of pulling out the planet head square spool 2 by the coal mining machine square spool pulling-out special device. As the T-shaped pressing rod 72 continues to extend, the first pulling-out mechanism 7 can provide a reverse force to the hollow strip 15, so that the hollow strip 15 drives the two threaded rods 63 of the pulling-out mechanism 6 to pull out the planet head square spool 2 at the same time, thereby ensuring the force balance during the pulling-out process of the planet head gland 3 and preventing the planet head square spool 2 from being inclined and stuck, ensuring the convenience of the pulling-out process of the planet head gland 3. In addition, after the planet head square spool 2 is pulled out, the electric hydraulic rod 4 drives the first sealing piston block 10 to retract through the control panel 12 and the PLC controller 13, and at the same time, under the cooperation of the negative pressure of the retraction of the first sealing piston block 10 and the reset auxiliary spring 20, the T-shaped pressing rod 72 retracts while pushing 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 closed through the control panel 12 and the PLC controller 13, and at the same time, the planet head square spool 2 is disassembled from the threaded protrusions 64. This mechanism makes the pulling-out process of the planet head gland 3 and the planet head square spool 2 balanced in force, and the operation process is simple and labor-saving, which can effectively improve the convenience of the pulling-out work, reduce the labor intensity of the staff, and improve the efficiency of the maintenance of the coal mining machine.

[0043] In addition, with the increase of the size of the planetary head gland 3 and the planetary head square spool 2 pulled out by the pulling mechanism 6, the clamping area of the side wall of the planetary head gland 3 and the planetary head square spool 2 is reduced, thereby reducing the resistance of the planetary head gland 3 and the planetary head square spool 2 to be pulled out, and at the same time, the detection end of the potentiometer displacement sensor 18 is pushed back by the fixed ring 81 at the side end of the hollow strip 15, the potentiometer displacement sensor 18 generates a corresponding displacement electric signal, and the potentiometer displacement sensor 18 transmits the displacement electric signal to the PLC controller 13, the PLC controller 13 controls the speed of the moving end of the electric hydraulic rod 4 to extend, thereby controlling the pulling force of the pulling mechanism 6 by reducing the extension speed of the moving rod 83 or the T-shaped pressing rod 72, avoiding the situation that the pulling mechanism 6 has too large pulling force at the moment of pulling out the planetary head gland 3 and the planetary head square spool 2, causing the device to push back and injure the worker, and with the gradual reduction of the pulling force of the pulling mechanism 6, the pulling load of the special device for pulling out the square spool of the coal mining machine is also reduced, thereby reducing the wear between the structural components of the device, and improving the service life of the special device for pulling out the square spool of the coal mining machine;

[0044] When the extraction mechanism 6 extracts the planetary head cover 3 and the planetary head square spigot 2, the PLC controller 13 also controls the micro air pump 59 to start, the micro air pump 59 purifies the sucked air through the activated carbon filter 19, then the clean air is transported into the air cylinder 51 through the air inlet pipe 58 and the second air guide check valve 55, the air in the air cylinder 51 is transported to the air guide through hole 65 of the threaded rod 63 through the first air guide check valve 54, the three-way pipe 56 and the connecting air pipe 57, before the planetary head cover 3 and the planetary head square spigot 2 are extracted, the air flow sprayed through the air guide through hole 65 can clean the coal powder impurities near the planetary head cover 3 and the planetary head square spigot 2, avoiding the accumulation of coal powder impurities to interfere with the extraction of the planetary head cover 3 and the planetary head square spigot 2, in addition, when the planetary head cover 3 and the planetary head square spigot 2 are extracted, the first sealing piston block 10 is pushed by the electric hydraulic rod 4 while extruding the T-shaped rod 52, the T-shaped rod 52 pushes the second sealing piston block 53 to move in the air cylinder 51, and makes the clean air in the air cylinder 51 quickly pass through the first air guide check valve 54, the three-way pipe 56, the connecting air pipe 57 and the air guide through hole 65 to be discharged, finally the high-pressure clean air is discharged into the inside connecting gap of the planetary head cover 3 and the planetary head square spigot 2, due to the effect of air pressure, the gas molecules in the clean air are extruded into the connecting gap of the planetary head cover 3 and the planetary head square spigot 2, and try to form an air film layer in the connecting gap of the planetary head cover 3 and the planetary head square spigot 2, using the air film layer to reduce the friction resistance of the planetary head cover 3 and the planetary head square spigot 2 being extracted, and the high-pressure clean air also forms a counter thrust force inside the planetary head cover 3 and the planetary head square spigot 2, which can improve the speed of extracting the planetary head cover 3 and the planetary head square spigot 2, this mechanism makes the coal mining machine square spigot extraction special device have the function of reducing the friction resistance of the planetary head cover 3 and the planetary head square spigot 2 being extracted, which can effectively improve the convenience of extracting the planetary head cover 3 and the planetary head square spigot 2, and improve the reliability of the use of the coal mining machine square spigot extraction special device, and further improve the efficiency of the maintenance of the coal mining machine.

[0045] The above description is only the preferred embodiment of the present application, and is not intended to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A special device for extracting a square worm of a coal mining machine, comprising a convex hollow shell (1), a planetary head square worm (2) to be extracted, and a planetary head gland (3), 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 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), and the plurality of telescopic rods (14) are fixedly connected to a hollow bar (15) on a 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), and the hole wall of the rectangular movable through hole (16) is movably connected to a pull-out mechanism (6); 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); 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 and 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) are provided. 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 fixedly connected to the air inlet end of the air inlet pipe (58).

2. A special device for extracting square falcons from a coal mining machine according to claim 1, 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) through an interference fit.

3. A special device for extracting square falcons from a coal mining machine according to claim 1, characterized in that: The extraction 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), both ends of the threaded rod (63) are fixedly connected to threaded protrusions (64), the threads of the threaded protrusions (64) match the threads of the fastening holes in the planetary head square falcon (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), and the air outlet ends of the two connecting air pipes (57) are sealed and sleeved with the threaded protrusions (64) at the top of the two threaded rods (63) through pipe clamps.

4. 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 side end hole wall of the first hollow cylinder (71) is movably connected to a T-shaped pressure rod (72), a top end of the T-shaped pressure rod (72) is fixedly connected to a third sealing piston block (73), an outer wall of the third sealing piston block (73) is sealingly and 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) is fixedly connected to a first electromagnetic control valve (74), an inlet end of the first electromagnetic control valve (74) is fixedly connected to a first oil pipe (75), and a liquid inlet of the first oil pipe (75) is fixedly connected to the outer wall of the convex hollow shell (1).

5. A special device for extracting square falcons from a coal mining machine according to claim 4, characterized in that: The second pulling mechanism (8) includes a fixed ring (81) fixedly connected to the side end of the hollow bar (15), the inner wall of the fixed ring (81) is fixedly connected to the second hollow cylinder (82), the side end hole wall of the first hollow cylinder (71) 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), and the liquid inlet end of the second oil pipe (87) is 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 rod walls of the T-shaped pressure rod (72) and the two movable rods (83) are sleeved with a return auxiliary spring (20).

7. The 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).

8. The special device for extracting square falcons from a coal mining machine according to claim 3, 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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