Disassembling and assembling tool for valve seat of high-pressure main steam valve of steam turbine

Abstract

The utility model belongs to the technical field of steam turbines, and particularly relates to a steam turbine high-pressure main steam valve seat dismounting tool which comprises a valve body and a valve seat arranged in an inner cavity of the valve body. The first fixing plate and the second fixing plate are arranged at the two ends of the valve seat correspondingly. The connecting rod penetrates through the first fixing plate and the second fixing plate, and the axis of the connecting rod coincides with the axis of the valve seat. The first supporting plate is arranged on the side, close to the second fixing plate, of the valve body and connected to the connecting rod. The second supporting plate is arranged on the side, away from the second fixing plate, of the first supporting plate, and the second supporting plate is connected to the connecting rod. According to the utility model, the problem that the normal production of a power plant is influenced due to the complicated operation in the existing disassembly and assembly process is solved, and meanwhile, the disassembly and assembly tool is ensured to be suitable for the complicated structure of the valve group.

Description

Technical Field

[0001] This utility model belongs to the field of steam turbine technology, specifically relating to a tool for disassembling and assembling the valve seat of a high-pressure main steam valve for a steam turbine. Background Technology

[0002] Steam turbines are key equipment in power generation and other fields, and their high-pressure main steam valve is an important component for controlling steam input. Because the high-pressure main steam valve seat is subjected to high temperature and high pressure conditions for extended periods, it is prone to wear, corrosion, or loosening, requiring regular inspection and replacement.

[0003] Currently, the disassembly and assembly of high-pressure main steam valve seats faces two major challenges: First, the disassembly and assembly process is complex and requires professional technicians, which leads to long maintenance time and high costs, thus affecting the normal production of power plants; Second, the compact layout and limited space of the turbine high-pressure main steam valve group make it difficult for traditional disassembly and assembly tools to play an effective role, exacerbating the difficulty of valve seat disassembly and assembly. Utility Model Content

[0004] The purpose of this utility model is to provide a tool for disassembling and assembling the valve seat of the high-pressure main steam valve of a steam turbine that can simplify the disassembly and assembly process and is applicable to complex valve group structures.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A tool for disassembling and assembling the valve seat of a high-pressure main steam valve for a steam turbine, comprising:

[0007] Valve body;

[0008] Valve seat, wherein the valve seat is disposed in the inner cavity of the valve body;

[0009] A first fixing plate and a second fixing plate are respectively disposed at both ends of the valve seat;

[0010] A connecting rod that passes through the first fixed plate and the second fixed plate, and whose axis coincides with the axis of the valve seat;

[0011] The first support plate is disposed on the side of the valve body near the second fixed plate, and the first support plate is connected to the connecting rod;

[0012] The second support plate is disposed on the side of the first support plate away from the second fixed plate, and the second support plate is connected to the connecting rod.

[0013] Furthermore, it also includes: a jack, which is disposed between the first support plate and the second support plate or between the second fixed plate and the first support plate.

[0014] Furthermore, it also includes: a valve body screw, which is arranged in a circular array on the side of the valve body and the first support plate, with the axis of the connecting rod as the center.

[0015] Furthermore, the first support plate is an H-shaped plate, and valve body screws are respectively installed in the mounting grooves of the H-shaped plate.

[0016] Furthermore, the first fixing plate and the second fixing plate are respectively fixed to the connecting rod by bolts, the second support plate is fixed to the connecting rod by bolts, and the first support plate is connected to the valve body screw by bolts.

[0017] Furthermore, a reinforcing plate perpendicular to the plate surface is provided on the first fixing plate near the valve seat.

[0018] Furthermore, a reinforcing plate perpendicular to the surface of the first support plate is provided on the plate surface near the valve body.

[0019] Furthermore, a reinforcing plate perpendicular to the surface of the second support plate is provided on the plate surface away from the valve body.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] This invention utilizes a valve seat with a first fixing plate and a second fixing plate at both ends, connected by a connecting rod. The connecting rod portion outside the valve body is connected to both a first support plate and a second support plate, enabling initial installation of the valve body disassembly and assembly device. Specifically, when the valve seat needs to be disassembled, a jack is positioned between the first and second support plates. The first support plate supports the jack, while the second support plate, under the thrust of the jack, moves the connecting rod to drive the first and second fixing plates, ultimately moving the valve seat out of the valve body, completing the disassembly. When the valve seat needs to be installed, the first support plate acts as a support, and the second fixing plate is subjected to thrust, allowing the valve seat to be finally installed inside the valve body. Its simple structure simplifies the valve seat disassembly and assembly process. Furthermore, the fit between the structural components and the valve seat makes the device suitable for high-pressure main steam valve assemblies, reducing the difficulty of disassembly and assembly. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view of the valve seat and valve body of this utility model;

[0023] Figure 2 This is a diagram showing the valve seat of this utility model in disassembled state;

[0024] Figure 3 for Figure 2 A three-dimensional cross-sectional view;

[0025] Figure 4 This is a cross-sectional view of the valve seat and valve body of this utility model.

[0026] Figure 5 This is a cross-sectional view of the valve seat in the installation state of this utility model.

[0027] In the diagram: 1. First fixing plate; 2. Second fixing plate; 3. First support plate; 4. Second support plate; 5. Connecting rod; 6. Valve body; 7. Valve body screw; 8. Valve seat; 9. Bolt. Detailed Implementation

[0028] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments. However, the following embodiments are only preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this utility model. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.

[0029] like Figures 1-3 In this embodiment, it includes: valve body 6, valve seat 8, first fixing plate 1, second fixing plate 2, first support plate 3, second support plate 4 and connecting rod 5;

[0030] A valve seat 8 that needs to be disassembled is provided inside the valve body 6, and the first fixing plate 1 and the second fixing plate 2 are respectively provided at both ends of the valve seat 8;

[0031] Specifically, by setting the first fixing plate 1 and the second fixing plate 2 at both ends of the valve seat 8, the valve seat 8 can be moved within the valve body 6 by applying force to the plates.

[0032] The first support plate 3 is disposed on the side of the valve body 6 close to the second fixed plate 2, the second support plate 4 is disposed on the side away from the second fixed plate 2, and the first support plate 3 and the second support plate 4 are disposed on the outside of the valve body 6.

[0033] The connecting rod 5 passes through the first fixed plate 1, the second fixed plate 2, the first support plate 3, and the second support plate 4 in sequence, and the central axis of the connecting rod 5 coincides with the center of the first fixed plate 1, the second fixed plate 2, the first support plate 3, and the second support plate 4.

[0034] It should be noted that the valve seat 8 needs to be completely disassembled. The first fixing plate 1 and the second fixing plate 2 are fixed to the rod of the connecting rod 5 by bolts 9, and the second support plate 4 is also connected to the connecting rod 5 by bolts 9.

[0035] Specifically, when a force is applied to the surface of the second support plate 4 near the valve seat 8, the second support plate 4 transmits the force to the connecting rod 5, and the connecting rod 5 can simultaneously drive the first fixed plate 1 and the second fixed plate 2 to move together, thereby achieving the purpose of disassembly.

[0036] It should be noted that the valve body screw 7 is arranged in a circular array around the axis of the connecting rod 5 on the same side of the valve body 6 and the first support plate 3.

[0037] The first support plate 3 is an H-shaped plate. The mounting groove of the H-shaped plate is provided with valve body screws 7 respectively, and the valve body screws 7 in the groove can optionally fix the first support plate 3 to the side of the valve body 6 by connecting bolts 9.

[0038] Specifically, when force is applied to the second support plate 4, the central hole of the second support plate 4 allows the connecting rod 5 to slide back and forth within the hole;

[0039] It should be noted that when the valve seat 8 is disassembled, the jack is positioned between the first support plate 3 and the second support plate 4. The first support plate 3 serves as its support, and the second support plate 4 is pushed by the jack, causing the valve seat 8 to move outward from the valve body 6.

[0040] like Figure 3-4 The valve seat 8 needs to be installed, the second support plate 4 needs to be removed, and the connecting rod 5 is sequentially provided with the first fixing plate 1, the second fixing plate 2 and the first support plate 3, and the mounting groove of the first support plate 3 is fixed to the valve body screw 7 by bolts 9;

[0041] It should be noted that when the valve seat 8 is installed, the jack is positioned between the first support plate 3 and the second fixed plate 2. The first support plate 3 supports it, and the second fixed plate 2 is pushed by the jack, which drives the valve seat 8 to move into the valve body 6.

[0042] Specifically, after the second fixed plate 2 is pushed by the jack, the connecting rod 5 slides in the center hole of the first support plate 3, causing the valve seat 8 to gradually move into the valve body, and finally achieve the purpose of installation.

[0043] In this embodiment, a reinforcing plate perpendicular to the plate surface is provided on the first fixing plate 1 near the valve seat 8;

[0044] In this embodiment, a reinforcing plate perpendicular to the plate surface is provided on the first support plate 3 near the valve body 6.

[0045] In this embodiment, a reinforcing plate perpendicular to the plate surface is provided on the second support plate 4 away from the valve body 6.

[0046] Working principle:

[0047] (1) Disassembly process

[0048] Before disassembly, ensure the equipment is in a safe condition, disconnect all power and pressure sources, and clean the work area. First, apply force to the second support plate 4. This force is transmitted to the connecting rod 5, causing the connecting rod 5 to push the first fixed plate 1 and the second fixed plate 2 together, thereby pushing the valve seat 8 outward.

[0049] As the valve seat 8 moves outward, the first support plate 3 provides support, and the second support plate 4 receives the thrust of the jack, pushing the valve seat 8 away from the valve body 6.

[0050] (2) Installation process

[0051] Ensure all components are clean and intact, then remove the second support plate 4. The jack is now positioned between the first support plate 3 and the second fixed plate 2, with the first support plate 3 providing support for the valve seat 8. Apply force to the second fixed plate 2, transmitting the thrust from the jack to the connecting rod 5. The connecting rod 5 slides within the central hole of the first support plate 3, gradually pushing the valve seat 8 into the valve body 6. Finally, the valve seat 8 is successfully installed into the valve body 6, and the equipment returns to normal operation.

[0052] Through the above operations:

[0053] 1. Protective components: Existing technologies may easily damage the valve body and valve seat during disassembly and assembly. However, simple tools, through proper design, such as using bolts for leverage and in conjunction with hydraulic jacks, can effectively avoid damage to the valve body and valve seat during conventional disassembly, ensuring the integrity of the components.

[0054] 2. Easy to operate: Some existing technologies may be complex and difficult to operate. Simple tools have a simple and reliable structure, which may be easier to install, disassemble and adjust, reducing labor intensity, reducing the requirements for operators, and making operation convenient and installation steps simplified.

[0055] 3. Improve efficiency: Existing technologies may have problems such as long disassembly and assembly time and low efficiency. Simple tools can shorten the valve maintenance period. For example, through clever structural design, valve seat disassembly and assembly can be achieved quickly, reducing unit downtime and improving overall maintenance efficiency.

[0056] 4. Strong applicability: Compared with some existing technologies, which are too specialized or have poor adaptability, simple tools may be applicable to the disassembly and assembly of valve seats of various specifications or types, or can better adapt to different working environments and equipment conditions; they may also be used for the disassembly and assembly of main steam valve seats of different models by simply adjusting or replacing parts.

[0057] 5. Cost advantage: Under the premise of ensuring functionality and quality, simple tools may have simple manufacturing processes and low material costs, or long service life and low maintenance costs, thus having certain economic advantages.

[0058] 6. Safe and reliable: Existing technologies may have safety hazards, such as tool slippage or uneven force leading to component breakage. Simple tools, through reasonable structural design, such as setting anti-slip structures and ensuring uniform force distribution, can improve the safety of operation and reduce the possibility of accidents.

[0059] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A tool for disassembling and assembling the valve seat of a high-pressure main steam valve for a steam turbine, characterized in that, include: Valve body (6); Valve seat (8), the valve seat (8) is disposed in the inner cavity of valve body (6); The first fixing plate (1) and the second fixing plate (2) are respectively disposed at both ends of the valve seat (8); The connecting rod (5) passes through the first fixed plate (1) and the second fixed plate (2), and the axis of the connecting rod (5) coincides with the axis of the valve seat (8); The first support plate (3) is disposed on the side of the valve body (6) near the second fixed plate (2) and is connected to the connecting rod (5); The second support plate (4) is disposed on the side of the first support plate (3) away from the second fixed plate (2), and the second support plate (4) is connected to the connecting rod (5).

2. The tool for disassembling and assembling the high-pressure main steam valve seat of a steam turbine according to claim 1, characterized in that, Also includes: The jack is disposed between the first support plate (3) and the second support plate (4) or between the second fixed plate (2) and the first support plate (3).

3. The turbine high-pressure main steam valve seat disassembly and assembly tool according to claim 2, characterized in that, Also includes: The valve body screw (7) is arranged in a circular array on the same side of the valve body (6) and the first support plate (3) with the axis of the connecting rod (5) as the center.

4. The tool for disassembling and assembling the high-pressure main steam valve seat of a steam turbine according to claim 3, characterized in that, The first support plate (3) is an H-shaped plate, and valve body screws (7) are respectively installed in the mounting groove of the H-shaped plate.

5. The tool for disassembling and assembling the high-pressure main steam valve seat of a steam turbine according to claim 4, characterized in that, The first fixing plate (1) and the second fixing plate (2) are respectively fixed to the connecting rod (5) by bolts (9), the second support plate (4) is fixed to the connecting rod (5) by bolts (9), and the first support plate (3) is connected to the valve body screw (7) by bolts (9).

6. The tool for disassembling and assembling the high-pressure main steam valve seat of a steam turbine according to claim 1, characterized in that, The first fixing plate (1) has a reinforcing plate perpendicular to the plate surface near the valve seat (8).

7. The turbine high-pressure main steam valve seat disassembly and assembly tool according to claim 6, characterized in that, The first support plate (3) has a reinforcing plate perpendicular to the plate surface near the valve body (6).

8. The turbine high-pressure main steam valve seat disassembly and assembly tool according to claim 7, characterized in that, The second support plate (4) is provided with a reinforcing plate perpendicular to the plate surface on the plate surface away from the valve body (6).

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