Turbine rotor coupling bolt dismounting device and working method

Abstract

The invention discloses a steam turbine rotor coupling bolt dismounting device and a working method in the technical field of hardware tools, the device comprises a cross beam, a fixed supporting seat is connected to the left end of the cross beam, an inner hexagonal hole seat is fixedly arranged on the right side face of the fixed supporting seat, and a movable supporting seat and a fixed mounting seat are arranged at the right end of the cross beam; the movable supporting seat is located on the left side of the fixed mounting seat, an inner hexagonal hydraulic wrench is arranged on the left side face of the movable supporting seat, a hydraulic telescopic cylinder is mounted on the fixed mounting seat, and the telescopic end of the hydraulic telescopic cylinder is in driving connection with the movable supporting seat. The bolt main body can be recovered from the bolt hole of the coupling and is convenient to detach, so that the detaching efficiency of the coupling connecting bolt is improved, and the bolt main body is not damaged.

Description

Technical Field

[0001] The invention relates to a steam turbine rotor coupling bolt removal device and a working method, belonging to the technical field of hardware tools. Background Art

[0002] The turbine rotor coupling is a key component in the steam turbine. It is mainly responsible for connecting the rotors of the steam turbine generator set and effectively transmitting the power of the steam turbine to the generator. In the working process of the steam turbine, the coupling plays a vital role, that is, connecting the various sections of the steam turbine rotor and the generator rotor, and realizing the transmission of torque;

[0003] When disassembling the turbine rotor coupling, it is necessary to remove multiple connecting bolts on the coupling. After the coupling has been used for a long time, the connecting bolts and nuts have formed a tight bond due to long-term operation and vibration, which increases the difficulty of disassembly. In particular, when there is rust or oil on the surface of the bolt, this tight bond phenomenon will be more obvious. In the existing disassembly method, after the nut of the connecting bolt is unscrewed, since the main body of the connecting bolt is still inserted in the mounting hole of the coupling, an external knocking tool is used to knock one end of the bolt, so that the bolt body is knocked out of the mounting hole of the coupling by the knocking force. However, this operation method is very labor-intensive for workers on the one hand, and on the other hand, it is impossible to easily remove the bolt body from the mounting hole of the coupling, which makes the disassembly efficiency of the connecting bolt of the coupling lower. In addition, removing the bolt by knocking will also cause deformation or damage to the bolt, making the bolt unable to be reused. Summary of the invention

[0004] In order to solve the above problems existing in the prior art, the present invention provides a steam turbine rotor coupling bolt removal device and a working method.

[0005] The technical solution of the present invention is as follows:

[0006] A device for removing bolts of a steam turbine rotor coupling comprises a crossbeam, wherein the left end of the crossbeam is connected to a fixed support seat, a hexagonal hole seat is fixedly provided on the right side surface of the fixed support seat, a movable support seat and a fixed mounting seat are respectively provided on the right end of the crossbeam, the movable support seat is located on the left side of the fixed mounting seat, a hexagonal hydraulic wrench is provided on the left side of the movable support seat, a hydraulic telescopic cylinder is installed on the fixed mounting seat, and the telescopic end of the hydraulic telescopic cylinder is drivingly connected to the movable support seat.

[0007] As a preferred solution, a slide groove is provided on the left side of the crossbeam, the upper end of the movable support seat is embedded in the slide groove to maintain a left-right sliding connection, and a reset spring for the movable support seat to move right and reset is installed on the left side of the slide groove inner cavity.

[0008] As a preferred solution, a sliding rod is fixedly connected to the left side of the fixed mounting seat, the left end of the sliding rod extends into the inner cavity of the sliding groove and is fixed on the left end wall of the sliding groove, and a sliding hole is opened at the upper end of the movable support seat to slide with the sliding rod.

[0009] As a preferred solution, reinforcing ribs are fixedly connected between the left side surface of the fixed mounting seat and the side walls around the fixed mounting seat.

[0010] As a preferred solution, the right side surface of the fixed mounting seat is connected to a flange mounting seat through a number of supporting ribs, the hydraulic telescopic cylinder is fixedly mounted on the flange mounting seat, the left end of the hydraulic telescopic cylinder passes through the fixed mounting seat and is connected to the end with a connecting end plate, a buffer spring is abutted between the connecting end plate and the right side surface of the fixed mounting seat; an open groove is provided at the lower end of the movable support seat, and the connecting end plate abuts against the hexagonal hydraulic wrench through the open groove.

[0011] As a preferred solution, operating handles are fixedly provided on the left and right sides of the hydraulic telescopic cylinder.

[0012] As a preferred solution, the fixed support seat is a three-dimensional bracket structure in which a main vertical plate and a side inclined plate are welded together in a Y shape.

[0013] As a preferred solution, the movable support seat is a three-dimensional bracket structure in which a main vertical plate and a side inclined plate are welded together in a Y shape, and a connecting column is connected between the main vertical plate and the side inclined plate.

[0014] As a preferred solution, a hanging ring is provided on the top of the crossbeam.

[0015] A working method of a steam turbine rotor coupling bolt removal device, using the steam turbine rotor coupling bolt removal device, comprising the following steps

[0016] Steps: Connect the hexagon socket hydraulic wrench and the hydraulic telescopic cylinder to the external hydraulic station respectively;

[0017] Steps: Connect the steam turbine rotor coupling bolt removal device through an external lifting rope device, and lift the device to the steam turbine rotor coupling outlet;

[0018] Steps: Adjust the position of the device, engage the hexagon socket on the left end of the device with the hexagonal end of the screw of one of the coupling bolts to be removed, and drive the movable support seat to move left through the hydraulic telescopic cylinder, so that the hexagon socket of the hexagonal hydraulic wrench engages with the nut of the coupling bolt;

[0019] Steps: Loosen and remove the nut of the coupling bolt by driving the hexagon socket hydraulic wrench to rotate in the direction of the installation and removal nut;

[0020] Steps: Further lift the coupling bolts through the hydraulic telescopic cylinder to loosen the coupling bolts and the coupling bolt holes;

[0021] Steps: Remove the device and take out the screws of the coupling bolts to complete the removal of one coupling bolt.

[0022] The present invention has the following beneficial effects:

[0023] The steam turbine rotor coupling bolt removal device of the present invention is respectively fixedly installed with a fixed hexagon socket seat and a movable hexagon socket hydraulic wrench at a position below the cross beam. The hexagon socket hydraulic wrench itself can realize high torque screwing, so that the nut of the connecting bolt can be screwed out. The hexagon socket hydraulic wrench is pushed horizontally by the hydraulic telescopic cylinder, and the bolt body can be loosened from the bolt hole of the coupling through the pushing of the push rod, so that it is convenient to remove, thereby improving the disassembly efficiency of the coupling connecting bolt without causing damage to the bolt body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the local structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the structure of the fixed mounting seat of the present invention. DETAILED DESCRIPTION

[0027] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Example 1

[0029] See also Figure 1-3 A device for removing bolts of a steam turbine rotor coupling comprises a cross beam 10, which is a square structural beam. A lifting ring 13 is arranged on the top of the cross beam 10. A fixed support seat 20 is connected to the left end of the cross beam 10. In order to improve the strength, the fixed support seat 20 is a three-dimensional support structure composed of a main vertical plate 21 and a side inclined plate 22 welded together in a Y shape.

[0030] A hexagonal socket 30 is fixedly provided on the right side surface of the fixed support seat 20. The hexagonal socket 30 is used to buckle the hexagonal end of the screw of the bolt and plays a fixed limiting role. In addition, in order to be able to smoothly push the screw out of the coupling bolt hole with room for movement, the depth of the hexagonal socket 30 must be greater than the thickness of the hexagonal end of the screw of the bolt.

[0031] A movable support seat 40 and a fixed mounting seat 50 are respectively provided at the right end of the crossbeam 10. The movable support seat 40 is located on the left side of the fixed mounting seat 50. A slide groove 11 is opened on the left side of the crossbeam 10. The upper end of the movable support seat 40 is embedded in the slide groove 11 to maintain a left-right sliding connection. A return spring 12 for the movable support seat 40 to move right and return is installed on the left side of the inner cavity of the slide groove 11; a slide rod 51 is fixedly connected to the left side of the fixed mounting seat 50, and the left end of the slide rod 51 extends into the inner cavity of the slide groove 11 and is fixed on the left end wall of the slide groove 11. A slide hole 41 that slides with the slide rod 51 is opened on the upper end of the movable support seat 40.

[0032] In order to improve the strength of the movable support seat 40 , the movable support seat 40 is a three-dimensional support structure in which the main vertical plate 21 and the side inclined plate 22 are welded together in a Y shape, and a connecting column 23 is connected between the main vertical plate 21 and the side inclined plate 22 .

[0033] In order to improve the installation strength of the fixed installation seat 50 , reinforcing ribs 52 are fixedly connected between the left side surface of the fixed installation seat 50 and the surrounding side walls of the fixed installation seat 50 .

[0034] A hexagon socket hydraulic wrench 60 is provided on the left side of the movable support seat 40. After the hexagon socket hydraulic wrench 60 is connected to the external hydraulic station, it can be rotated by hydraulic drive, thereby achieving high-torque rotation to loosen the nut from the screw, saving time and effort and improving operating efficiency.

[0035] A hydraulic telescopic cylinder 70 is installed on the fixed mounting seat 50, and the telescopic end of the hydraulic telescopic cylinder 70 is drivingly connected to the movable support seat 40. Specifically, the right side of the fixed mounting seat 50 is connected to a flange mounting seat 54 through a plurality of supporting ribs 53, and the hydraulic telescopic cylinder 70 is fixedly installed on the flange mounting seat 54. The left end of the hydraulic telescopic cylinder 70 passes through the fixed mounting seat 50 and is connected to a connecting end plate 71 at the end. A buffer spring 72 is abutted against the connecting end plate 71 and the right side of the fixed mounting seat 50. By providing the buffer spring 72, when the hydraulic telescopic cylinder 70 pushes out the pushing screw, there is a contact buffer process to avoid damage to the end of the screw caused by impact and collision; the lower end of the movable support seat 40 is provided with an open groove 42, and the connecting end plate 71 abuts against the hexagonal hydraulic wrench 60 through the open groove 42, and operating handles 73 are fixedly provided on the left and right sides of the hydraulic telescopic cylinder 70.

[0036] Example 2

[0037] Based on the metallurgical slag waste heat recovery system of Example 1, this embodiment provides 10. A working method of a steam turbine rotor coupling bolt removal device, using the steam turbine rotor coupling bolt removal device of Example 1, comprising the following steps:

[0038] Step 1: Connect the hexagon socket hydraulic wrench 60 and the hydraulic telescopic cylinder 70 to the external hydraulic station respectively;

[0039] Step 2: Connect the steam turbine rotor coupling bolt removal device through an external lifting rope device, and lift the device to the steam turbine rotor coupling outlet;

[0040] Step 3: Adjust the position of the device, engage the hexagonal socket 30 at the left end of the device with the hexagonal end of the screw of one of the coupling bolts to be removed, and drive the movable support seat 40 to move leftward through the hydraulic telescopic cylinder 70, so that the hexagonal hole of the hexagonal hydraulic wrench 60 is engaged with the nut of the coupling bolt;

[0041] Step 4: Loosen and remove the nut of the coupling bolt by driving the hexagon socket hydraulic wrench 60 to rotate in the direction of installing and removing the nut;

[0042] Step 5: Further lifting by the hydraulic telescopic cylinder 70 to loosen the screws of the coupling bolts and the bolt holes on the coupling;

[0043] Step 6: Remove the device and take out the screws of the coupling bolts to complete the removal of one coupling bolt.

[0044] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A steam turbine rotor coupling bolt removal device, characterized in that: The invention comprises a cross beam (10), wherein the left end of the cross beam (10) is connected to a fixed support seat (20), the right side surface of the fixed support seat (20) is fixedly provided with a hexagon socket seat (30), the right end of the cross beam (10) is respectively provided with a movable support seat (40) and a fixed mounting seat (50), the movable support seat (40) is located on the left side of the fixed mounting seat (50), the left side surface of the movable support seat (40) is provided with a hexagon socket hydraulic wrench (60), and a hydraulic telescopic cylinder (70) is installed on the fixed mounting seat (50), and the telescopic end of the hydraulic telescopic cylinder (70) is drivingly connected to the movable support seat (40).

2. A steam turbine rotor coupling bolt removal device according to claim 1, characterized in that: A slide groove (11) is provided on the left side of the cross beam (10), and the upper end of the movable support seat (40) is embedded in the slide groove (11) to maintain a left-right sliding connection. A return spring (12) is installed on the left side of the inner cavity of the slide groove (11) for returning the movable support seat (40) to the right.

3. A steam turbine rotor coupling bolt removal device as claimed in claim 2, characterized in that: A sliding rod (51) is fixedly connected to the left side of the fixed mounting seat (50), and the left end of the sliding rod (51) extends into the inner cavity of the sliding groove (11) and is fixed to the left end wall of the sliding groove (11). A sliding hole (41) is opened at the upper end of the movable supporting seat (40) and is slidably matched with the sliding rod (51).

4. A steam turbine rotor coupling bolt removal device as claimed in claim 2, characterized in that: Reinforcement ribs (52) are respectively fixedly connected between the left side surface of the fixed mounting seat (50) and the surrounding side walls of the fixed mounting seat (50).

5. A steam turbine rotor coupling bolt removal device as claimed in claim 1, characterized in that: The right side surface of the fixed mounting seat (50) is connected to a flange mounting seat (54) via a plurality of supporting ribs (53); the hydraulic telescopic cylinder (70) is fixedly mounted on the flange mounting seat (54); the left end of the hydraulic telescopic cylinder (70) passes through the fixed mounting seat (50) and is connected to an end plate (71); a buffer spring (72) is provided between the end plate (71) and the right side surface of the fixed mounting seat (50); an open groove (42) is provided at the lower end of the movable support seat (40); the connecting end plate (71) is in contact with the hexagonal hydraulic wrench (60) via the open groove (42).

6. A steam turbine rotor coupling bolt removal device as claimed in claim 1, characterized in that: Operating handles (73) are fixedly provided on the left and right sides of the hydraulic telescopic cylinder (70).

7. A steam turbine rotor coupling bolt removal device as claimed in claim 1, characterized in that: The fixed support seat (20) is a three-dimensional support structure composed of a main vertical plate (21) and a side inclined plate (22) connected by welding in a Y shape.

8. A steam turbine rotor coupling bolt removal device as claimed in claim 1, characterized in that: The movable support seat (40) is a three-dimensional support structure formed by welding a main vertical plate (21) and a side inclined plate (22) connected in a Y shape, and a connecting column (23) is connected between the main vertical plate (21) and the side inclined plate (22).

9. A steam turbine rotor coupling bolt removal device as claimed in claim 1, characterized in that: A lifting ring (13) is provided on the top of the crossbeam (10).

10. A working method of a steam turbine rotor coupling bolt removal device, using the steam turbine rotor coupling bolt removal device according to any one of claims 2 to 9, characterized in that: The following steps are included Step 1: Connect the hexagon socket hydraulic wrench (60) and the hydraulic telescopic cylinder (70) to the external hydraulic station respectively; Step 2: Connect the steam turbine rotor coupling bolt removal device through an external lifting rope device, and lift the device to the steam turbine rotor coupling outlet; Step 3: Adjust the position of the device, engage the hexagonal socket (30) at the left end of the device with the hexagonal end of the screw of one of the coupling bolts to be removed, and drive the movable support seat (40) to move leftward through the hydraulic telescopic cylinder (70), so that the hexagonal hole of the hexagonal hydraulic wrench (60) is engaged with the nut of the coupling bolt; Step 4: Loosen the nut of the coupling bolt by driving the hexagon socket hydraulic wrench (60) to rotate in the direction of installing and removing the nut; Step 5: Further lifting by the hydraulic telescopic cylinder (70) to loosen the screws of the coupling bolts and the bolt holes on the coupling; Step 6: Remove the device and take out the screws of the coupling bolts to complete the removal of one coupling bolt.

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