Pin dismounting device for overhauling steam turbine of coal-fired power plant

Abstract

The invention discloses a pin dismounting device for steam turbine overhaul of a coal-fired power plant, and belongs to the technical field of steam turbine overhaul. The problem that the pin is inconvenient to pull out after being used for a long time is solved. The pin pulling device comprises a fixing frame and a steam turbine clamped on the side face of the fixing frame. When the fixing pin is dismantled and overhauled, the fixing pin to be pulled out can be pushed into the preformed hole by a small distance, the air bag is inflated by the inflation assemblies in the first mounting groove and the second mounting groove in the upper end and the lower end of the electric push rod, the gap between the preformed hole and the electric push rod is filled by the inflation assemblies, and in the continuous pushing process, the fixing pin can be pulled out through the inflation assemblies. The pin dismounting device has the advantages that the pin dismounting device can be clamped and fixed to the steam turbine with the pin needing to be dismounted firstly, the fixed pin is impacted and pulled out through the electric push rod, the lubricating oil can be injected between the fixed pin and the reserved hole in the pulling-out process, and the fixed pin can be conveniently dismounted through the electric push rod. And the fixing pin can be quickly pulled out more conveniently.

Description

Technical Field

[0001] The invention belongs to the technical field of steam turbine overhaul, and in particular relates to a dismantling device for overhauling a steam turbine in a coal-fired power plant. Background Art

[0002] A thermal power plant is abbreviated as a thermal power plant. It is a factory that uses combustibles (such as coal) as fuel to produce electricity. Its basic production process is: when the fuel is burned, it heats water to generate steam, converting the chemical energy of the fuel into thermal energy. The steam pressure drives the steam turbine to rotate, converting the thermal energy into mechanical energy. Then the steam turbine drives the generator to rotate, converting the mechanical energy into electrical energy. The thermal power plant is equipped with a thermal power plant steam turbine. The thermal power plant steam turbine needs to be overhauled after long-term use. There are many fixing pins on the thermal power plant steam turbine, so the pins need to be removed for maintenance, so special tools are needed to remove the pins.

[0003] For example, a pin removal mechanism for steam turbine maintenance in a thermal power plant with announcement number CN219337594U includes a base, a top plate is arranged above the base, the top plate and the base are fixedly connected by a support rod, a threaded sleeve is rotatably connected to the middle part of the upper surface of the top plate through a bearing, a screw that can move up and down is connected to the inner thread of the threaded sleeve, and a limiting structure for limiting and guiding the screw is arranged at the bottom of the top plate. This pin removal mechanism for steam turbine maintenance in a thermal power plant is convenient for effective limiting and fixing of the workpiece through the setting of the clamping mechanism, and can ensure that the workpiece will not move during the process of removing the pin, which is convenient for removing the pin thereon, and the setting of the bidirectional screw allows the two clamping blocks to move in opposite directions at the same time, which has a good limiting effect and is simple and convenient to operate.

[0004] The above patent sets a clamping mechanism to facilitate effective limiting and fixing of the workpiece, and can ensure that the workpiece will not move during the removal of the pin. However, for the steam turbine of a thermal power plant, which is generally a larger mechanical equipment, the pin needs to be removed by the device. The steam turbine of the thermal power plant needs to be disassembled into parts of appropriate sizes before the next step of pin removal can be carried out. There are many inconveniences when using it. After the steam turbine has been used for a long time, there will be a lot of oil stains between the pin and the reserved hole. When the pin is removed, the presence of these oil stains will further hinder the removal of the pin. It is also necessary to apply lubricating oil to the pin to facilitate the removal of the pin, and the operation is cumbersome.

[0005] In view of the above problems, a dismantling device for steam turbine maintenance in coal-fired power plants is proposed. Summary of the invention

[0006] In view of the above problems existing in the prior art, the purpose of the present invention is to provide a pin removal device for the maintenance of steam turbines in coal-fired power plants. The device is used to work, thereby solving the above-mentioned problem that for the steam turbines in thermal power plants, generally large mechanical equipment, the pins need to be removed by the device before the steam turbines in the thermal power plants are disassembled into parts of appropriate sizes before the next step of pin removal can be carried out. There are many inconveniences when using the device, and after the steam turbines have been used for a long time, there will be a lot of oil stains between the pins and the reserved holes. When the pins are removed, the presence of these oil stains will further hinder the removal of the pins, and it is also necessary to apply lubricating oil to the pins to facilitate the removal of the pins, which is a cumbersome operation.

[0007] In order to solve the above problems, the technical solution adopted by the present invention is as follows: A pin dismantling device for overhauling a steam turbine in a coal-fired power plant comprises a fixed frame and a steam turbine clamped on the side of the fixed frame, telescopic clamping rods are fixedly installed on both sides of the side of the fixed frame, a slide groove 1 is provided on the side of the fixed frame, a movable block is slidably connected in the slide groove 1, and a pin dismantling device is installed on the side of the movable block, the pin dismantling device comprises an electric push rod fixedly installed on the side of the movable block, the upper and lower end side walls of the electric push rod are respectively provided with an installation groove 1 and an installation groove 2, an inflation assembly is installed in the installation groove 1, and a lubrication assembly is installed in the installation groove 2, a connecting plate is fixedly installed on the side wall of the connecting plate, an oil tank assembly is installed on the side wall of the connecting plate, an air bag is fixedly installed on the side wall of the movable end of the electric push rod, a contact block is fixedly installed on one end of the connecting plate, and an oil outlet hole is provided on the side wall of the contact block.

[0008] Furthermore, the inflation component includes a telescopic rod slidably installed in the mounting groove, a fixed rod is fixedly installed on the side wall of the telescopic rod, a spring is fixedly installed between the side wall of the telescopic rod and the inner wall of the mounting groove, and the spring is sleeved on the outer periphery of the fixed rod.

[0009] Furthermore, a connecting rod is fixedly installed at one end of the telescopic rod, a rotating wheel is rotatably installed at one end of the connecting rod, an inclined groove is opened on both side walls of the installation groove, a sliding rod is fixedly installed on the side wall of the connecting rod, and both ends of the sliding rod are slidably connected in the inclined groove.

[0010] Furthermore, an air bin is fixedly installed on the side of the mounting groove 1, a piston slider 1 is fixedly installed on the side wall of the fixing rod 1, the piston slider 1 is slidably connected in the air bin, a gas pipeline is opened at the end of the air bin, and one end of the gas pipeline is connected to the interior of the airbag.

[0011] Furthermore, the lubrication assembly includes a telescopic rod 2 slidably installed in the mounting groove 2, an oil bin is fixedly installed on the side of the mounting groove 2, a fixed rod 2 is fixedly installed on the side of the telescopic rod 2, a piston slider 2 is fixedly installed at one end of the fixed rod 2, and the piston slider 2 is slidably connected to the inside of the oil bin.

[0012] Furthermore, two inclined grooves are provided on the inner walls on both sides of the second installation groove, an L-shaped rod is fixedly installed on one end of the second telescopic rod, two sliding rods are fixedly installed on the side walls on both sides of the L-shaped rod, the two sliding rods are slidably connected in the second inclined groove, and two rotating wheels are rotatably installed on one end of the L-shaped rod.

[0013] Furthermore, a spring 2 is fixedly installed between the side wall of the telescopic rod 2 and the inner wall of the mounting groove 2, and the spring 2 is sleeved on the outside of the fixed rod 2. An oil pipeline is opened at the end of the oil tank, and the oil pipeline is connected to the oil outlet hole.

[0014] Furthermore, a reserved hole is provided on the steam turbine, a fixing pin is slidably connected in the reserved hole, and the electric push rod is movably connected in the reserved hole.

[0015] Furthermore, the oil tank assembly includes an oil tank fixedly mounted on the side wall of the connecting plate, a second slide groove being opened at the lower end of the oil tank, a magnetic connector being slidably connected in the second slide groove, connecting rods two being fixedly connected on both sides of the magnetic connector, the second connecting rod being slidably connected to the lower end of the oil tank, and a soft rubber seal being fixedly mounted inside the magnetic connector.

[0016] Furthermore, a connecting iron pipe is fixedly installed on the upper end of the oil tank, and the connecting iron pipe is directly opposite to the magnetic connecting head.

[0017] Compared with the prior art, the present invention has the following beneficial effects: (1) The two sides of the turbine to be pinned are clamped and fixed by telescopic clamp rods. After clamping and fixing, the pins are pulled out by sliding the electric push rods installed on the fixed frame. The electric push rods can be moved to multiple different positions to pull out the pins at different positions. (2) When the electric push rod is pushed into the reserved hole, the wheel on the side wall of the electric push rod contacts the side wall of the steam turbine and drives the slide rod to move along the inclined groove during the continuous pushing process. During the movement, the telescopic rod contracts and drives the fixed rod to push the piston slide into the air chamber. The gas in the air chamber enters the air bag along the air pipe, causing the air bag to expand, automatically blocking the gap between the electric push rod and the reserved hole, forming a closed space to facilitate the subsequent injection of lubricating oil and prevent the lubricating oil from flowing out; (3) During the continuous advancement of the electric push rod, the runner 2 contacts the side wall of the steam turbine. At this time, the electric push rod drives the slide rod 2 to move along the inclined groove 2. During the movement, the telescopic rod 2 contracts and pushes the fixed rod 2 and the piston slide block 2 into the oil tank. The lubricating oil in the oil tank is squeezed outward due to the advancement of the piston slide block 2, flows into the contact block along the oil pipeline, and then flows out along the oil outlet hole. The contact block is set at the head end of the electric push rod, and the air bag is set on the rear end outer wall of the contact block. Under the action of the air bag and the lubricating oil, the lubricating oil injected into the reserved hole will gradually fill the lubricating oil between the reserved hole and the fixed pin in the direction of the advancement of the electric push rod, making it easier to pull out the fixed pin under the action of the lubricating oil; (4) During the extension and retraction of the electric push rod, the connecting iron pipe is driven to move. When the connecting iron pipe and the magnetic connector cooperate and are connected together by suction, oil can be directly added to the oil tank through the oil tank, thereby realizing the automatic replenishment of lubricating oil in the oil tank. When the connecting iron pipe moves to the bottom of the oil tank, the soft rubber seal can prevent the lubricating oil from flowing out. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the overall cross-sectional three-dimensional structure of the present invention; Figure 3 It is a three-dimensional structural schematic diagram of the pin removal device of the present invention; Figure 4 This is a schematic diagram of the cross-sectional three-dimensional structure of the pin removal device of the present invention; Figure 5 This is a schematic diagram of the longitudinal cross-section of the pin removal device of the present invention; Figure 6 For the present invention Figure 2 A in the middle is an enlarged schematic diagram of the three-dimensional structure; Figure 7 For the present invention Figure 2 The enlarged three-dimensional structure diagram at B in the middle; Figure 8 For the present invention Figure 5 Enlarged schematic diagram of the three-dimensional structure at point C in the middle.

[0019] In the figure: 1, fixed frame; 11, telescopic clamp rod; 12, slide slot 1; 2, movable block; 21, connecting plate; 3, pin removal device; 31, electric push rod; 32, mounting slot 1; 33, mounting slot 2; 34, contact block; 341, oil outlet; 35, air bag; 36, inclined slot 1; 37, inclined slot 2; 4, steam engine; 41, reserved hole; 42, fixed pin; 5, oil tank assembly; 51, oil tank; 52, slide slot 2; 53, magnetic connector; 54, connecting rod 2; 55, Soft rubber sealing; 6. Inflatable component; 61. Telescopic rod one; 62. Fixed rod one; 63. Spring one; 64. Piston slider one; 65. Air chamber; 66. Air pipe; 67. Connecting rod one; 68. Slide rod one; 69. Rotor one; 7. Lubrication component; 71. Telescopic rod two; 72. Fixed rod two; 73. Spring two; 74. Piston slider two; 75. Oil chamber; 751. Connecting iron pipe; 76. Oil pipe; 77. L-shaped rod; 78. Slide rod two; 79. Rotor two. DETAILED DESCRIPTION

[0020] 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.

[0021] Example 1 In order to solve the technical problem that the pin cannot be quickly pulled out by impact without auxiliary effect, such as Figure 1 - Figure 5 As shown, the following preferred technical solutions are provided: a dismantling device for steam turbine maintenance in a coal-fired power plant, comprising a fixed frame 1 and a steam turbine 4 clamped on the side of the fixed frame 1, telescopic clamping rods 11 are fixedly installed on both sides of the side of the fixed frame 1, a slide groove 12 is provided on the side of the fixed frame 1, a movable block 2 is slidably connected in the slide groove 12, a dismantling device 3 is installed on the side of the movable block 2, the dismantling device 3 comprises an electric push rod 31 fixedly installed on the side of the movable block 2, the upper and lower end side walls of the electric push rod 31 are respectively provided with a mounting groove 1 32 and a mounting groove 2 33, an inflation component 6 is installed in the mounting groove 1 32, and a lubrication component 7 is installed in the mounting groove 2 33, a connecting plate 21 is fixedly installed on the side wall of the movable block 2, an oil tank component 5 is installed on the side wall of the connecting plate 21, an air bag 35 is fixedly installed on the side wall of the movable end of the electric push rod 31, a contact block 34 is fixedly installed at one end of the connecting plate 21, and an oil outlet hole 341 is provided on the side wall of the contact block 34.

[0022] Specifically, when the fixing pin 42 on the steam turbine of the floating coal-fired power plant is removed for maintenance by using the device, the fixing pin 42 to be removed can be pushed into the reserved hole 41 for a short distance, leaving a short distance, and fixedly clamped on both sides of the steam turbine 4 to be pulled out by the telescopic clamping rod 11, and the movable block 2 is slid along the slide groove 12 to the position where the electric push rod 31 is opposite to the reserved hole 41, and the electric push rod 31 can be started to continuously push the fixing pin 42 out of the reserved hole 41 slowly. When the electric push rod 31 is pushed into the reserved hole 41, the installation groove 1 32 and the installation groove 2 33 at the upper and lower ends of the electric push rod 31 are fixedly clamped on the two sides of the steam turbine 4 to be pulled out, and the movable block 2 is slid along the slide groove 12 to the position where the electric push rod 31 is opposite to the reserved hole 41. The inflation component 6 in 3 first inflates the airbag 35, and the airbag 35 expands to fill the gap between the reserved hole 41 and the electric push rod 31. During the continuous advancement, the lubricating component 7 releases the lubricating oil to the contact point through the oil outlet hole 341, so that the electric push rod 31 is more convenient to remove the fixing pin 42. The pin removal device for steam turbine maintenance in a coal-fired power plant can be first clamped and fixed on the steam turbine 4 whose pin needs to be removed, and the fixing pin 42 is knocked and removed by the electric push rod 31. During the removal process, the lubricating oil can be injected between the fixing pin 42 and the reserved hole 41, which is more convenient for the quick removal of the fixing pin 42.

[0023] Example 2 In order to solve the technical problem that the lubricating oil leaks out along the reserved hole 41 when the lubricating oil is added later, Figure 3 - Figure 6 As shown, the following preferred technical solution is provided: the inflatable component 6 includes a telescopic rod 61 slidably installed in the installation groove 32, the side wall of the telescopic rod 61 is fixedly installed with a fixed rod 62, a spring 63 is fixedly installed between the side wall of the telescopic rod 61 and the inner wall of the installation groove 32, the spring 63 is sleeved on the outer periphery of the fixed rod 62, and the spring 63 can push the telescopic rod 61 and the fixed rod 62 back to their original positions after they move.

[0024] A connecting rod 67 is fixedly installed at one end of the telescopic rod 61, and a runner 69 is rotatably installed at one end of the connecting rod 67. Inclined grooves 36 are provided on both side walls of the installation groove 32. A sliding rod 68 is fixedly installed on the side wall of the connecting rod 67. Both ends of the sliding rod 68 are slidably connected in the inclined groove 36. When the runner 69 contacts the side wall of the steam turbine 4, the sliding rod 68 can be driven to slide along the inclined groove 36.

[0025] An air bin 65 is fixedly mounted on the side of the mounting groove 32, a piston slider 64 is fixedly mounted on the side wall of the fixing rod 62, the piston slider 64 is slidably connected in the air bin 65, an air delivery pipe 66 is provided at the end of the air bin 65, one end of the air delivery pipe 66 is connected to the interior of the air bag 35, when the slide rod 68 slides along the inclined groove 36, the piston slider 64 can be driven to move in the air bin 65, and the air in the air bin 65 is pushed into the air bag 35 to expand it.

[0026] Specifically, when the electric push rod 31 is pushed into the reserved hole 41, the electric push rod 31 moves along the reserved hole 41. During the movement, the wheel 69 on the side wall of the mounting groove 32 contacts the side wall of the steam turbine 4. During the continuous advancement, the slide rod 68 slides along the inclined groove 36. At this time, the connecting rod 67 tilts along the inclined groove 36 and squeezes the telescopic rod 61 at the lower end. During the continuous advancement, the fixed rod 62 and the piston slider 64 are driven to advance into the air chamber 65, and the air in the air chamber 65 is squeezed into the air bag 35 along the air supply pipe 66 to inflate the air bag 35. At this time, the air bag 35 automatically expands, and the gap between the electric push rod 31 and the reserved hole 41 is automatically filled, so as to prevent the lubricating oil from leaking when the lubricating oil is subsequently replenished.

[0027] Example 3 In order to solve the technical problem that when the fixing pin 42 is removed, there is no corresponding lubrication measure, which may cause the pin to be damaged, such as Figure 2 - Figure 8 As shown, the following preferred technical solution is provided: the lubrication assembly 7 includes a telescopic rod 71 slidably installed in the mounting groove 33, an oil bin 75 is fixedly installed on the side of the mounting groove 33, a fixed rod 72 is fixedly installed on the side of the telescopic rod 71, a piston slider 74 is fixedly installed at one end of the fixed rod 72, the piston slider 74 is slidably connected to the inside of the oil bin 75, and the lubricating oil in the oil bin 75 can be squeezed outward through the fixed rod 72.

[0028] The inner walls on both sides of the mounting groove 33 are provided with inclined grooves 37, an L-shaped rod 77 is fixedly installed at one end of the telescopic rod 71, and sliding rods 78 are fixedly installed on both side walls of the L-shaped rod 77. The sliding rods 78 are slidably connected in the inclined grooves 37, and a rotating wheel 79 is rotatably installed at one end of the L-shaped rod 77, so that the L-shaped rod 77 can slide along the inclined grooves 37.

[0029] A spring 2 73 is fixedly installed between the side wall of the telescopic rod 2 71 and the inner wall of the mounting groove 2 33 . The spring 2 73 is sleeved on the outer side of the fixed rod 2 72 . An oil pipe 76 is provided at the end of the oil tank 75 . The oil pipe 76 is connected to the oil outlet hole 341 . The spring 2 73 can push the fixed rod 2 72 back to its original position after it moves.

[0030] A reserved hole 41 is provided on the steam turbine 4 , a fixing pin 42 is slidably connected in the reserved hole 41 , and the electric push rod 31 is movably connected in the reserved hole 41 .

[0031] The oil tank assembly 5 includes an oil tank 51 fixedly mounted on the side wall of the connecting plate 21, a slide groove 52 is provided at the lower end of the oil tank 51, a magnetic connector 53 is slidably connected in the slide groove 52, connecting rods 54 are fixedly connected on both sides of the magnetic connector 53, the connecting rods 54 are slidably connected to the lower end of the oil tank 51, a soft rubber seal 55 is fixedly installed inside the magnetic connector 53, the connecting rods 54 slide at the lower end of the oil tank 51, and the lower end of the oil tank 51 can be sealed, the soft rubber seal 55 is in a closed state when it is not connected to the connecting iron pipe 751 at the lower end, and the lubricating oil can flow into the oil tank 75 when connected.

[0032] A connecting iron pipe 751 is fixedly installed on the upper end of the oil tank 75 , and the connecting iron pipe 751 is directly opposite to the magnetic connector 53 .

[0033] Specifically, when the electric push rod 31 moves to the point where the runner 79 at the lower end contacts the side wall of the steam turbine 4, the runner 69 and the connecting rod 67 at the upper end move along the inclined slot 36 to be stored in the mounting slot 32. At this time, the air in the air chamber 65 is squeezed into the air bag 35, and the air bag 35 is inflated to fill the gap between the electric push rod 31 and the reserved hole 41. During the continuous advancement of the electric push rod 31, the sliding rod 78 is driven to slide along the inclined slot 37, and during the sliding process, the fixing rod 72 and the piston slider 74 are driven to advance into the oil chamber 75. At this time, the telescopic rod 2 71 is damaged, and the lubricating oil in the oil tank 75 is squeezed during the sliding process of the piston slider 2 74. The lubricating oil enters the contact block 34 at the front end of the electric push rod 31 along the oil delivery pipe 76 at the end, and then flows out through the opened oil outlet 341 to lubricate the reserved hole 41. The outflow of the lubricating oil can be prevented under the action of the expanded air bag 35. When the electric push rod 31 is reciprocated and extended, the oil tank 51 installed on its upper end is always in a fixed state. Since a connecting iron pipe 751 is provided at the upper end of the oil tank 75, with the cooperation of the magnetic connector 53, the electric push rod 31 can drive the magnetic connector 53 along the slide groove when it is extended and retracted. The second 52 slides and seals the lower end of the oil tank 51 through the connecting rod 54. When the electric push rod 31 drives the connecting iron pipe 751 to move and slide away from the oil tank 51, the soft rubber seal 55 can prevent the lubricating oil in the oil tank 51 from flowing out and causing leakage of the lubricating oil. When the electric push rod 31 is pushed and retracted, the device can drive the lubrication component 7 to squeeze the lubricating oil in the oil tank 75 outward, and directly lubricate the contacting side wall through the oil outlet hole 341 set on the side wall of the contact block 34 at the head end of the electric push rod 31, and automatically replenish the lubricating oil in the oil tank 75 through the setting of the magnetic connector 53 and the connecting iron pipe 751.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dismantling device for overhauling a steam turbine in a coal-fired power plant, comprising a fixing frame (1) and a steam turbine (4) clamped on a side of the fixing frame (1), characterized in that: Telescopic clamping rods (11) are fixedly mounted on both sides of the side of the fixed frame (1), a slide groove (12) is provided on the side of the fixed frame (1), a movable block (2) is slidably connected in the slide groove (12), a dismantling device (3) is installed on the side of the movable block (2), the dismantling device (3) comprises an electric push rod (31) fixedly mounted on the side of the movable block (2), and the upper and lower side walls of the electric push rod (31) are respectively provided with a first mounting groove (32) and a second mounting groove (33), An inflatable component (6) is installed in the first installation groove (32), a lubrication component (7) is installed in the second installation groove (33), a connecting plate (21) is fixedly installed on the side wall of the movable block (2), an oil tank component (5) is installed on the side wall of the connecting plate (21), an air bag (35) is fixedly installed on the side wall of the movable end of the electric push rod (31), a contact block (34) is fixedly installed on one end of the connecting plate (21), and an oil outlet hole (341) is opened on the side wall of the contact block (34).

2. A dismantling device for steam turbine maintenance in a coal-fired power plant according to claim 1, characterized in that: The inflatable assembly (6) comprises a telescopic rod (61) slidably mounted in the mounting groove (32), a fixed rod (62) being fixedly mounted on the side wall of the telescopic rod (61), a spring (63) being fixedly mounted between the side wall of the telescopic rod (61) and the inner wall of the mounting groove (32), and the spring (63) being sleeved on the outer periphery of the fixed rod (62).

3. A dismantling device for overhauling a steam turbine in a coal-fired power plant according to claim 2, characterized in that: A connecting rod (67) is fixedly mounted on one end of the telescopic rod (61), a rotating wheel (69) is rotatably mounted on one end of the connecting rod (67), both side walls of the mounting groove (32) are provided with an inclined groove (36), a sliding rod (68) is fixedly mounted on the side wall of the connecting rod (67), and both ends of the sliding rod (68) are slidably connected in the inclined groove (36).

4. A pin removal device for overhauling a steam turbine in a coal-fired power plant according to claim 3, characterized in that: An air chamber (65) is fixedly mounted on the side of the mounting groove (32), a piston slider (64) is fixedly mounted on the side wall of the fixing rod (62), the piston slider (64) is slidably connected in the air chamber (65), an air delivery pipe (66) is provided at the end of the air chamber (65), and one end of the air delivery pipe (66) is connected to the interior of the air bag (35).

5. The pin removal device for overhauling a steam turbine in a coal-fired power plant according to claim 1 is characterized in that: The lubrication assembly (7) comprises a second telescopic rod (71) slidably mounted in the second mounting groove (33); an oil bin (75) is fixedly mounted on the side of the second mounting groove (33); a second fixed rod (72) is fixedly mounted on the side of the second telescopic rod (71); a second piston slide block (74) is fixedly mounted on one end of the second fixed rod (72); and the second piston slide block (74) is slidably connected to the inside of the oil bin (75).

6. A dismantling device for overhauling a steam turbine in a coal-fired power plant according to claim 5, characterized in that: The inner walls of both sides of the second installation groove (33) are provided with a second inclined groove (37), one end of the second telescopic rod (71) is fixedly installed with an L-shaped rod (77), and the side walls of both sides of the L-shaped rod (77) are fixedly installed with a second sliding rod (78), the second sliding rod (78) is slidably connected in the second inclined groove (37), and one end of the L-shaped rod (77) is rotatably installed with a second rotating wheel (79).

7. The pin removal device for overhauling a steam turbine in a coal-fired power plant according to claim 6, characterized in that: A second spring (73) is fixedly mounted between the side wall of the second telescopic rod (71) and the inner wall of the second mounting groove (33), and the second spring (73) is sleeved on the outer side of the second fixing rod (72). An oil delivery pipe (76) is provided at the end of the oil tank (75), and the oil delivery pipe (76) is connected to the oil outlet hole (341).

8. The pin removal device for overhauling a steam turbine in a coal-fired power plant according to claim 1, characterized in that: A reserved hole (41) is provided on the steam turbine (4), a fixing pin (42) is slidably connected in the reserved hole (41), and the electric push rod (31) is movably connected in the reserved hole (41).

9. The pin removal device for overhauling a steam turbine in a coal-fired power plant according to claim 7, characterized in that: The oil tank assembly (5) comprises an oil tank (51) fixedly mounted on the side wall of the connecting plate (21), a second slide groove (52) being provided at the lower end of the oil tank (51), a magnetic connector (53) being slidably connected in the second slide groove (52), two connecting rods (54) being fixedly connected on both sides of the magnetic connector (53), the second connecting rod (54) being slidably connected to the lower end of the oil tank (51), and a soft rubber seal (55) being fixedly mounted inside the magnetic connector (53).

10. A dismantling device for overhauling a steam turbine in a coal-fired power plant according to claim 9, characterized in that: A connecting iron pipe (751) is fixedly mounted on the upper end of the oil bin (75), and the connecting iron pipe (751) is directly opposite to the magnetic connector (53).

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