Disassembling tool under condition of seizure of coupling bolt of steam turbine

Abstract

The utility model relates to the technical field of electric power engineering, in particular to a dismounting tool under the condition of seizure of a turbine coupling bolt, which comprises a screw rod and a screw cap, two gaskets are arranged on the surface of the screw rod, the two gaskets are both tightly attached to the screw cap, the lower surfaces of the two gaskets are fixedly connected with a stress disc, and the stress disc is fixedly connected with the screw cap. Two hydraulic jacks are installed on the side, close to the screw rod, of the stress disc, two first guide plates are fixedly connected to the side, close to the hydraulic jacks, of the stress disc, two second guide plates are fixedly connected to the side, close to the first guide plates, of the stress disc, and supporting blocks are fixedly connected to the ends, close to the hydraulic jacks, of the two first guide plates; the supporting block is tightly attached to the hydraulic jack. The utility model solves the problems that the screw rod is easy to deform due to thermal expansion caused by long-term operation of a steam turbine, and the damage of the coupling bolt is difficult to ensure when the deformed and seizure coupling bolt screw rod is dismounted at the moment.

Description

TECHNICAL FIELD

[0001] The utility model relates to power engineering technical field especially relates to a kind of dismounting tool under the condition of turbine counter wheel bolt seizure. BACKGROUND

[0002] Turbine is a kind of equipment mainly used in power engineering, its working principle is to drive blade and rotor rotation by high-temperature high-pressure steam through fixed nozzle to become accelerated airflow, to realize the conversion of electric energy, in order to maintain, restore or improve the performance of turbine, it is usually necessary to overhaul turbine periodically, during the process of turbine A wheel overhauling, the counter wheel bolt of turbine needs to be dismounted.

[0003] The existing related technology often has the following defects: when the counter wheel bolt of turbine is dismounted, due to the long-term operation of turbine, it is easy to cause the deformation of screw rod due to thermal expansion, at this time, the deformed and seized screw rod is difficult to guarantee that the counter wheel bolt will not be damaged.

[0004] Therefore, the utility model provides a kind of dismounting tool under the condition of turbine counter wheel bolt seizure. INVENTION CONTENTS

[0005] The utility model aims at solving the shortcomings in prior art that due to the long-term operation of turbine, it is easy to cause the deformation of screw rod due to thermal expansion, at this time, the deformed and seized counter wheel bolt screw rod is difficult to guarantee that the counter wheel bolt will not be damaged, and provides a kind of dismounting tool under the condition of turbine counter wheel bolt seizure.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a kind of dismounting tool under the condition of turbine counter wheel bolt seizure, including screw rod and nut, the surface of screw rod is provided with two gaskets, two gaskets are closely attached to nut, the lower surface of two gaskets is fixedly connected with stress disc, two hydraulic jacks are installed on the side of stress disc close to screw rod.

[0007] The effect of the above-mentioned components is that: by setting gasket, stress disc and hydraulic jack can be installed on counter wheel when counter wheel bolt is dismounted, by setting hydraulic jack, the dismounting of screw rod can be assisted.

[0008] Preferably, the side of stress disc close to hydraulic jack is fixedly connected with two first guide plates, the side of stress disc close to first guide plate is fixedly connected with two second guide plates.

[0009] The effect achieved by the above components is that the first guide plate and the second guide plate are arranged, so that the hydraulic jack can be conveniently installed after the force plate is installed.

[0010] Preferably, the two first guide plates are fixedly connected with the supporting blocks at one end close to the hydraulic jack, the supporting blocks are closely attached to the hydraulic jack, and the two second guide plates are provided with the pressing rods at the sides away from each other.

[0011] The effect achieved by the above components is that the supporting blocks are arranged to limit the position of the hydraulic jack, and the pressing rods are arranged to facilitate the control of the movement of the hydraulic jack during installation.

[0012] Preferably, the two second guide plates are provided with the sliding grooves at the sides close to the pressing rods, and the sliding blocks are slidably connected to the surfaces of the sliding grooves of the two second guide plates, and the sliding blocks are fixedly connected with the pressing rods.

[0013] The effect achieved by the above components is that the sliding blocks are arranged to stably connect the pressing rods with the second guide plates while ensuring the movement of the pressing rods.

[0014] Preferably, the pressing rods are fixedly connected with the connecting plates at the sides close to the hydraulic jack, and the limiting rods are slidably connected to the inner walls of the connecting plates.

[0015] The effect achieved by the above components is that the connecting plates are arranged to connect the limiting rods to the pressing rods, the limiting rods slidably connected to the inner walls of the connecting plates can move, and the limiting rods are arranged to limit the position of the hydraulic jack.

[0016] Preferably, the limiting rods are fixedly connected with the pull plates at the ends away from the hydraulic jack, springs are sleeved on the surfaces of the limiting rods, and the two ends of the springs are fixedly connected with the pull plates and the connecting plates, respectively.

[0017] The effect achieved by the above components is that the pull plates are arranged to facilitate the installation of the springs and the movement of the limiting rods, and the springs are arranged to ensure the stable connection between the limiting rods and the connecting plates while limiting the position of the limiting rods.

[0018] Preferably, the pressing rods are fixedly connected with the control rods at the sides away from the hydraulic jack, the control rods are closely attached to the surfaces of the force plates, the control rods are fixedly connected with the moving plates at the sides away from the hydraulic jack, the force plates are fixedly connected with the arc-shaped plates at the sides away from the hydraulic jack, the moving plates are provided with the adjusting lead screws threaded inserted into the inner walls, and the adjusting lead screws are rotatably connected with the arc-shaped plates.

[0019] The effects achieved by the above components are as follows: by setting up control levers, moving plates, and adjusting screws, the position of the pressure rod can be easily adjusted; by setting up arc-shaped plates, the adjusting screws can be connected to the force-bearing plate.

[0020] In summary:

[0021] 1. In this utility model, a hydraulic jack can be installed by setting a force-bearing plate and a shim. By setting a hydraulic jack, pressure can be applied to push the force-bearing plate and the shim, so that the shim drives the nut to move and disassemble the wheel bolt.

[0022] 2. In this utility model, by setting the first guide plate, the second guide plate, and the support block, the hydraulic jack can be conveniently positioned and installed, thereby avoiding the simultaneous installation of the force plate and the hydraulic jack, reducing the difficulty of disassembling tools when the turbine wheel bolts are seized. By setting the control rod, the moving plate, and the adjusting screw, the pressure rod can be conveniently moved, thereby facilitating the adjustment of the hydraulic jack position. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of this utility model from another angle;

[0025] Figure 3 This utility model Figure 1 A partial structural diagram;

[0026] Figure 4 This utility model Figure 2 Enlarged view of point A;

[0027] Figure 5 This utility model Figure 2 A partial structural diagram.

[0028] Legend: 1. Screw; 2. Nut; 3. Force plate; 4. Washer; 5. Hydraulic jack; 6. First guide plate; 7. Second guide plate; 8. Support block; 9. Sliding block; 10. Pressure rod; 11. Control rod; 12. Connecting plate; 13. Limiting rod; 14. Pull plate; 15. Spring; 16. Arc plate; 17. Moving plate; 18. Adjusting screw. Detailed Implementation

[0029] Reference Figure 1The utility model provides a technical scheme: a dismounting tool under the condition of turbine pair wheel bolt seizure, including screw rod 1 and nut 2, the surface of screw rod 1 is equipped with two gaskets 4, two gaskets 4 are closely attached with nut 2, and the lower surface of two gaskets 4 is fixedly connected with stress disc 3, and two hydraulic jacks 5 are installed on the side of stress disc 3 close to screw rod 1. Through setting gasket 4, can be convenient when the pair wheel bolt is dismounted, install stress disc 3 and hydraulic jack 5 to pair wheel, through setting hydraulic jack 5, can the dismounting of screw rod 1 play the effect of auxiliary.

[0030] The overall specific settings and effects will be described below.

[0031] Referring to Figures 1-5 In the embodiment, stress disc 3 is fixedly connected with two first guide plates 6 on the side close to hydraulic jack 5, and stress disc 3 is fixedly connected with two second guide plates 7 on the side close to first guide plate 6. Through setting first guide plate 6 and second guide plate 7, after installing stress disc 3, it is convenient to install hydraulic jack 5. Two first guide plates 6 are fixedly connected with supporting blocks 8 on the end close to hydraulic jack 5, supporting blocks 8 are closely attached with hydraulic jack 5, and two second guide plates 7 are fixedly connected with pressure rods 10 on the side away from each other. Through setting supporting block 8, the position of hydraulic jack 5 can be limited, and through setting pressure rod 10, it is convenient to control the movement of hydraulic jack 5 close to supporting block 8 when installing hydraulic jack 5. Two second guide plates 7 are fixedly connected with sliding grooves on the side close to pressure rod 10, and sliding blocks 9 are slidably connected with the surface of the sliding grooves on two second guide plates 7, and sliding blocks 9 are fixedly connected with pressure rod 10. Through setting sliding block 9, pressure rod 10 can be stably connected with second guide plate 7, and it is ensured that pressure rod 10 can move.

[0032] The side close to the hydraulic jack 5 of the pressing rod 10 is fixedly connected with a connecting plate 12, and the inner wall of the connecting plate 12 is slidably connected with a limiting rod 13. By arranging the connecting plate 12, the limiting rod 13 can be connected to the pressing rod 10, the limiting rod 13 slidably connected to the inner wall of the connecting plate 12 can be moved, and by arranging the limiting rod 13, the position of the hydraulic jack 5 can be limited. The end away from the hydraulic jack 5 of the limiting rod 13 is fixedly connected with a pull plate 14, the surface of the limiting rod 13 is sleeved with a spring 15, and the two ends of the spring 15 are fixedly connected with the pull plate 14 and the connecting plate 12 respectively. By arranging the pull plate 14, the spring 15 can be conveniently installed and the limiting rod 13 can be moved, by arranging the spring 15, the stable connection between the limiting rod 13 and the connecting plate 12 can be ensured, and the position of the limiting rod 13 can be limited. The side away from the hydraulic jack 5 of the pressing rod 10 is fixedly connected with a control rod 11, the control rod 11 is closely attached to the surface of the stress disc 3, the side away from the hydraulic jack 5 of the control rod 11 is fixedly connected with a moving plate 17, the side away from the hydraulic jack 5 of the stress disc 3 is fixedly connected with an arc-shaped plate 16, the inner wall of the moving plate 17 is threadedly inserted with an adjusting screw 18, and the adjusting screw 18 is rotatably connected with the arc-shaped plate 16. By arranging the control rod 11, the moving plate 17 and the adjusting screw 18, the position of the pressing rod 10 can be conveniently adjusted, and by arranging the arc-shaped plate 16, the adjusting screw 18 can be connected to the stress disc 3.

[0033] The working principle is that when the dismounting tool is used to dismount the counter wheel bolt in the case that the counter wheel bolt is stuck, firstly, the force receiving disc 3 and the gasket 4 are moved, so that the gasket 4 is close to the screw rod 1 and the nut 2, the position of the gasket 4 is limited through the nut 2, the limiting rod 13 is driven to slide in the inner wall of the connecting plate 12 through pulling the pull plate 14, so that the pull plate 14 moves away from the connecting plate 12, then the hydraulic jack 5 is moved to be close to the pressing rod 10 on the force receiving disc 3, the pull plate 14 is loosened, under the elastic force of the spring 15, the limiting rod 13 moves to be close to the hydraulic jack 5, the adjusting screw rod 18 is rotated, so that the adjusting screw rod 18 rotates on the inner wall of the moving plate 17 and the surface of the arc-shaped plate 16, thereby the pressing rod 10 is driven to move through the control rod 11, the sliding block 9 is driven to slide on the sliding groove surface of the second guide plate 7 through the movement of the pressing rod 10, and the hydraulic jack 5 is driven to move to be close to the supporting block 8, the installation of the hydraulic jack 5 is completed, then the hydraulic jack 5 is started to push the force receiving disc 3 to move away from the counter wheel, so that the counter wheel bolt is dismounted, through the setting of the force receiving disc 3 and the gasket 4, the hydraulic jack 5 can be installed, through the setting of the hydraulic jack 5, the force receiving disc 3 and the gasket 4 can be pressed and pushed, so that the gasket 4 drives the nut 2 to move, the counter wheel bolt is dismounted, through the setting of the first guide plate 6 and the second guide plate 7 and the supporting block 8, the hydraulic jack 5 can be conveniently positioned and installed, so that the force receiving disc 3 and the hydraulic jack 5 are avoided to be installed at the same time, the difficulty of installing the dismounting tool in the case that the counter wheel bolt of the steam turbine is stuck is reduced, through the setting of the control rod 11, the moving plate 17 and the adjusting screw rod 18, the pressing rod 10 can be conveniently controlled to move, so that the adjustment of the position of the hydraulic jack 5 is conveniently completed.

[0034] In the description of the utility model, it needs to explain, unless another explicit stipulation and limit, term " install " " link " " connection " should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be directly connected, also can pass through intermediate medium indirectly link, can be two element inside intercommunication. For ordinary skilled person in the art, the above-mentioned term can be understood in the specific meaning in the utility model through specific circumstances.

Claims

1. A dismounting tool for a steam turbine in case of seizure of the wheel bolts, comprising a screw rod (1) and a screw nut (2), characterized in that: The surface of the screw rod (1) is provided with two gaskets (4), the two gaskets (4) are closely attached with the screw cap (2), the lower surfaces of the two gaskets (4) are fixedly connected with a stress disc (3), and the stress disc (3) is provided on the side close to the screw rod (1) with two hydraulic jacks (5).

2. A tool for disassembling a steam turbine according to claim 1, characterized in that: The stress disc (3) is fixedly connected on the side close to the hydraulic jack (5) with two first guide plates (6), and the stress disc (3) is fixedly connected on the side close to the first guide plate (6) with two second guide plates (7).

3. A tool for disassembly of a steam turbine in case of seizure of a pair of wheels, according to claim 2, characterized in that: The two first guide plates (6) are fixedly connected on the ends close to the hydraulic jack (5) with supporting blocks (8), the supporting blocks (8) are closely attached with the hydraulic jacks (5), and the two second guide plates (7) are fixedly connected on the sides away from each other with pressing rods (10).

4. A tool for disassembly of a steam turbine in the event of seizure of a pair of bolts, according to claim 3, characterised in that: The two second guide plates (7) are provided on the sides close to the pressing rods (10) with sliding grooves, the surfaces of the sliding grooves of the two second guide plates (7) are slidably connected with sliding blocks (9), and the sliding blocks (9) are fixedly connected with the pressing rods (10).

5. A tool for disassembling a turbine according to claim 3, characterized in that: The pressing rod (10) is fixedly connected on the side close to the hydraulic jack (5) with a connecting plate (12), and the inner wall of the connecting plate (12) is slidably connected with a limiting rod (13).

6. A tool for disassembly of a steam turbine in the event of seizure of a pair of bolts, according to claim 5, characterized in that: The limiting rod (13) is fixedly connected on the end away from the hydraulic jack (5) with a pulling plate (14), the surface of the limiting rod (13) is sleeved with a spring (15), and the two ends of the spring (15) are fixedly connected with the pulling plate (14) and the connecting plate (12).

7. A tool for disassembling a turbine according to claim 3, characterized in that: The pressing rod (10) is fixedly connected on the side away from the hydraulic jack (5) with a control rod (11), the control rod (11) is closely attached on the surface of the stress disc (3), the control rod (11) is fixedly connected on the side away from the hydraulic jack (5) with a moving plate (17), the stress disc (3) is fixedly connected on the side away from the hydraulic jack (5) with an arc-shaped plate (16), the inner wall of the moving plate (17) is threadedly inserted with an adjusting screw rod (18), and the adjusting screw rod (18) is rotatably connected with the arc-shaped plate (16).

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