Grinding and polishing device for machining main valve shell of steam turbine

Abstract

The utility model relates to the technical field of grinding and polishing, and discloses a grinding and polishing device for processing a main valve shell of a steam turbine, which comprises a working table, a sliding chute is arranged on the working table, and a push plate is arranged in the sliding chute. When a hydraulic rod drives a pushing block to ascend, the pushing block extrudes a pushing plate, the pushing plate moves in a sliding groove under limiting of a first clamping strip, and therefore the effect that an abutting plate expands to abut against, expand and position the interior of the main valve shell is achieved, the distance between the grinding machine and the main valve shell is adjusted through a second screw, the grinding machine is made to be close to the valve shell, and the grinding efficiency is improved. And then the grinding machine is started to grind the main valve shell, the motor drives the first screw rod to rotate, the first screw rod rotates to drive the limiting block to do up-down reciprocating motion, and therefore when the grinding machine grinds the main valve shell, up-down reciprocating grinding can be conducted, and the grinding machine does not need to be manually held for use; the physical output is reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding and polishing, in particular to a grinding and polishing device for processing a main steam valve housing of a steam turbine. Background Art

[0002] The main steam valve of the steam turbine is one of the important protective devices of the steam turbine. If the main steam valve fails during operation, it will not only cause the steam source to be unable to be interrupted, but also lead to serious accidents such as turbine overspeeding and turbine main shaft fracture. Therefore, the working performance of the main steam valve directly affects the safe and stable operation of the steam turbine power generation unit.

[0003] For the processing of the main steam valve housing of a steam turbine, a grinding and polishing device is an important device to ensure the surface finish and smoothness of the valve housing. Such a device usually includes a grinding wheel, a polishing wheel or other grinding tools, but most grinding and polishing devices need to be manually controlled for use, which consumes physical strength and has low work efficiency over a long period of time. Therefore, those skilled in the art provide a grinding and polishing device for processing the main steam valve housing of a steam turbine to solve the problems raised in the above background technology. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the utility model provides a grinding and polishing device for processing a main steam valve housing of a steam turbine, so as to solve the problem that the grinding and polishing equipment needs to be manually controlled for use, which consumes physical strength over a long period of time and has low work efficiency.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a grinding and polishing device for processing a main steam valve casing of a steam turbine, comprising a workbench, a slide groove is provided on the workbench, a push plate is arranged in the slide groove, a pressure plate is installed on the upper part of the push plate, first clamping strips are installed on both sides of the push plate, a second clamping groove is provided on the inclined surface of the bottom side of the push plate, a hydraulic rod is provided in the workbench, a push block is installed on the top of the hydraulic rod, a second clamping strip is installed on the inclined surface of the peripheral side of the push block, a motor is installed on one side of the workbench, a first screw is drivingly connected to the motor, a limiting block is threadedly sleeved on the first screw, a second screw is threadedly sleeved in the limiting block, and a grinder is rotatably clamped on the other end of the second screw.

[0008] Preferably, a limit plate is installed on the upper outer wall of the grinder, and the limit plate is limitedly plugged into the limit block, so that the distance between the grinder and the main steam valve housing can be adjusted when the second screw is rotated.

[0009] Preferably, a limiting rod is provided on one side of the first screw, the limiting rod is fixedly mounted on the workbench, the limiting block is slidably sleeved with the limiting rod and is limited by the limiting rod. When the motor drives the first screw to rotate, the rotation of the first screw can drive the limiting block to reciprocate up and down.

[0010] Preferably, a first card slot is opened on the inner walls on both sides of the slide groove, the push plate is slidably engaged with the first card slot through a first card strip, and the push block is slidably engaged with the second card slot through a second card strip. When the hydraulic rod drives the push block to rise and fall, the push plate and the pressure plate on the push plate can be driven to open and close by the push block.

[0011] (III) Beneficial effects

[0012] Compared with the prior art, the utility model provides a grinding and polishing device for processing the main steam valve housing of a steam turbine, which has the following beneficial effects:

[0013] Through the design, when the hydraulic rod drives the push block to rise, the push block squeezes the push plate, and the push plate moves in the slide groove under the limit of the first clamping strip, so as to achieve the effect of the expansion of the pressure plate on the internal expansion and positioning of the main steam valve housing. The distance between the grinder and the main steam valve housing is adjusted by the second screw rod, so that the grinder and the valve housing are close, and then the grinder is started to grind the main steam valve housing, and the first screw rod is driven by the motor to rotate. The rotation of the first screw can drive the limit block to reciprocate up and down, so that the grinder can perform reciprocating up and down grinding on the main steam valve housing. The equipment does not need to be manually held by humans to use the grinding equipment, which reduces physical exertion and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of a grinding and polishing device for processing a main steam valve housing of a steam turbine provided in an embodiment of the present application.

[0015] Figure 2 It is a schematic structural diagram of a second screw in a grinding and polishing device for machining a main steam valve housing of a steam turbine provided in an embodiment of the present application.

[0016] Figure 3 It is a structural cross-sectional view of a workbench in a grinding and polishing device for machining a main steam valve housing of a steam turbine provided in an embodiment of the present application.

[0017] In the figure: 1. workbench; 2. slide; 3. first slot; 4. push plate; 5. pressure plate; 6. first clip bar; 7. second slot; 8. hydraulic rod; 9. push block; 10. second clip bar; 11. limit rod; 12. motor; 13. first screw; 14. limit block; 15. second screw; 16. grinder; 17. limit plate. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] The utility model provides a technical solution, a grinding and polishing device for processing the main steam valve housing of a steam turbine, please refer to Figure 1 , Figure 2 , including a workbench 1, a slide groove 2 is provided on the workbench 1, a push plate 4 is provided in the slide groove 2, a pressing plate 5 is installed on the upper part of the push plate 4, first clamping strips 6 are installed on both sides of the push plate 4, and a second clamping groove 7 is provided on the inclined surface of the bottom side of the push plate 4, please refer to Figure 2 , Figure 3 A hydraulic rod 8 is arranged in the workbench 1, a push block 9 is installed on the top of the hydraulic rod 8, a second clamping strip 10 is installed on the inclined surface around the push block 9, a motor 12 is installed on one side of the workbench 1, a first screw 13 is driven and connected to the motor 12, a limit block 14 is threadedly sleeved on the first screw 13, a second screw 15 is threadedly sleeved on the limit block 14, and a grinder 16 is rotatably clamped on the other end of the second screw 15;

[0020] See also Figure 2 , Figure 3 , a limit plate 17 is installed on the upper outer wall of the grinder 16, and the limit plate 17 is limitedly plugged with the limit block 14, so that when the second screw 15 is rotated, the distance between the grinder 16 and the main steam valve housing can be adjusted, and a limit rod 11 is arranged on one side of the first screw 13, and the limit rod 11 is fixedly installed with the workbench 1, and the limit block 14 is slidably sleeved with the limit rod 11, and is limited by the limit rod 11. When the motor 12 drives the first screw 13 to rotate, the rotation of the first screw 13 can drive the limit block 14 to reciprocate up and down, and the inner walls on both sides of the slide 2 are provided with first card grooves 3, and the push plate 4 is slidably engaged with the first card groove 3 through the first card strip 6, and the push block 9 is slidably engaged with the second card groove 7 through the second card strip 10. When the hydraulic rod 8 drives the push block 9 to rise and fall, the push plate 4 and the pressure plate 5 on the push plate 4 can be driven to open and close through the push block 9.

[0021] In the present invention, a plurality of slide grooves 2 are provided on the workbench 1, and first card grooves 3 are provided on the inner walls of both sides of the slide grooves 2, and a push plate 4 is slidably connected through the first card grooves 3 in the slide grooves 2, a pressing plate 5 is installed on the upper side of the push plate 4, and an inclined surface is provided on the lower side of the push plate 4, and a second card groove 7 is provided on the inclined surface, a hydraulic rod 8 is provided in the workbench 1, a push block 9 is installed on the top of the hydraulic rod 8, and a second card strip 10 is installed on the inclined surface of the peripheral side of the push block 9, and the second card strip 10 is engaged with the second card groove 7 on the bottom side of the push plate 4;

[0022] When the hydraulic rod 8 drives the push block 9 to rise, the push block 9 squeezes the push plate 4, and the push plate 4 moves in the slide groove 2 under the limit of the first clamping strip 6, so as to achieve the effect of the expansion of the pressure plate 5 on the internal pressure expansion positioning of the main steam valve housing, and the distance between the grinder 16 and the main steam valve housing is adjusted by the second screw 15, so that the grinder 16 is close to the valve housing, and then the grinder 16 is started to grind the main steam valve housing, and the first screw 13 is driven by the motor 12 to rotate, and the rotation of the first screw 13 can drive the limit block 14 to reciprocate up and down, so that the grinder 16 can grind the main steam valve housing reciprocatingly up and down, and the equipment does not need to be manually held by humans to use the grinding equipment, which reduces physical consumption and improves work efficiency;

[0023] When the grinding of the surface corresponding to the grinding machine 16 is completed, the push block 9 can be lowered by the hydraulic rod 8, and the push plate 4 is retracted inwardly under the drive of the push block 9. At this time, the valve housing can be rotated and adjusted to grind the other side.

[0024] 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", "comprise" or any other variants 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.

[0025] In this document, unless otherwise clearly stipulated and limited, terms such as "installation", "setting", "connection", "fixation", and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in this utility model according to the specific circumstances.

[0026] 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 grinding and polishing device for machining a main steam valve housing of a steam turbine, comprising a workbench (1), characterized in that: The workbench (1) is provided with a slide groove (2), a push plate (4) is arranged in the slide groove (2), a pressure plate (5) is installed on the upper part of the push plate (4), first clamping strips (6) are installed on both sides of the push plate (4), a second clamping groove (7) is arranged on the inclined surface of the bottom side of the push plate (4), a hydraulic rod (8) is arranged in the workbench (1), a push block (9) is installed on the top of the hydraulic rod (8), a second clamping strip (10) is installed on the inclined surface of the peripheral side of the push block (9), a motor (12) is installed on one side of the workbench (1), a first screw rod (13) is driven and connected to the motor (12), a limit block (14) is threadedly sleeved on the first screw rod (13), a second screw rod (15) is threadedly sleeved on the inner side of the limit block (14), and the other end of the second screw rod (15) is rotatably clamped with a grinder (16).

2. A grinding and polishing device for machining a main steam valve housing of a steam turbine according to claim 1, characterized in that: A limit plate (17) is installed on the upper outer wall of the grinder (16), and the limit plate (17) is plugged into the limit block (14) in a limit manner.

3. A grinding and polishing device for machining a main steam valve housing of a steam turbine according to claim 1, characterized in that: A limiting rod (11) is provided on one side of the first screw rod (13); the limiting rod (11) is fixedly mounted on the workbench (1); and the limiting block (14) is slidably sleeved with the limiting rod (11).

4. A grinding and polishing device for machining a main steam valve housing of a steam turbine according to claim 1, characterized in that: The inner walls on both sides of the slide groove (2) are provided with first clamping grooves (3), and the push plate (4) is slidably clamped with the first clamping grooves (3) via a first clamping strip (6).

5. The grinding and polishing device for machining a main steam valve housing of a steam turbine according to claim 1, characterized in that: The push block (9) is slidably engaged with the second engagement groove (7) via a second engagement strip (10).

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