Special tool for disassembling and assembling valve seat of quick-closing valve of steam turbine

Abstract

The utility model discloses a special tool for disassembling and assembling a valve seat of a quick-closing valve of a steam turbine, which comprises a positioning plate, a plurality of first guide screws, a support plate and a second guide screw, the circumferential direction of the positioning plate is provided with a plurality of first guide screws which are uniformly arranged at intervals, and the positioning plate is detachably connected with the valve seat in the quick-closing valve through the first guide screws. A supporting plate is arranged on the end face of the quick-closing valve and detachably connected with the quick-closing valve through a second guide screw, the first guide screw penetrates through the supporting plate, a pull rod is arranged in the middle of the supporting plate, one end of the pull rod penetrates through the supporting plate and is screwed into the positioning plate, the other end of the pull rod is in threaded connection with a jacking loosening nut, and the jacking loosening nut is attached to the supporting plate. By using the tool, the valve seat can be smoothly and stably taken out from the inside of the quick-closing valve on the premise that the valve seat or the quick-closing valve is not damaged, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of equipment disassembly and assembly devices, in particular to a special tool for disassembly and assembly of a valve seat of a steam turbine quick-closing valve. Background Art

[0002] The valve beam of the main steam regulating valve of the steam turbine used in the petrochemical ethylene unit has a processing error problem and needs to be disassembled and returned to the factory for repair. When disassembling the quick-closing valve, it is difficult to disassemble because the quick-closing valve is arranged horizontally and the valve seat is located deep inside the quick-closing valve. Some existing tools that assist in disassembly will cause certain damage to the end face of the valve seat during use, causing certain hidden dangers to the normal use of the components. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a special tool for disassembling and assembling a valve seat of a steam turbine quick-closing valve.

[0004] The technical solution of the utility model is: a special tool for disassembling and assembling the valve seat of a steam turbine quick-closing valve, comprising a positioning plate, a first guide screw, a support plate and a second guide screw, a plurality of first guide screws with uniform intervals are arranged on the circumference of the positioning plate, the positioning plate is detachably connected to the valve seat in the quick-closing valve through the first guide screw, a support plate is arranged on the end face of the quick-closing valve, the support plate is detachably connected through the second guide screw, the first guide screw passes through the support plate, a pull rod is arranged in the middle of the support plate, one end of the pull rod passes through the support plate and is screwed into the positioning plate, the other end is threadedly connected to a top loose nut, and the top loose nut fits the support plate.

[0005] Furthermore, a plurality of first threaded holes matching the first guide screw are provided on the circumference of the end surface of the valve seat, and a first through hole matching the first guide screw is provided on the positioning plate. One end of the first guide screw passes through the first through hole, is screwed into the first threaded hole and is provided with a positioning nut, which fits the end surface of the positioning plate.

[0006] Furthermore, a plurality of second threaded holes matching the second guide screw are provided on the circumference of the end surface of the quick-closing valve, and a second through hole matching the first guide screw, the second guide screw and the pull rod is provided on the end surface of the support plate. One end of the second guide screw passes through the second through hole, is screwed into the second threaded hole and is provided with a press-in nut, which fits the end surface of the support plate.

[0007] Furthermore, one end of the first guide screw passes through the second through hole, and an adjusting nut is provided on a side of the support plate away from the quick-closing valve.

[0008] Furthermore, a third threaded hole is provided on the positioning plate, one end of the pull rod is screwed into the third threaded hole, and the other end passes through the second through hole and is threadedly connected to the top loose nut.

[0009] Compared with the prior art, the utility model has the following advantages: no external force is directly applied to the valve seat or the quick-closing valve during the process of disassembling or installing the valve seat, so that the valve seat or the quick-closing valve is not damaged; when disassembling the valve seat, the pull rod can apply an outward pulling force to the positioning plate by tightening the top loosening nut, thereby indirectly pulling the valve seat outward, and the valve seat is kept stable during the pulling process through the first guide screw, without deviating from the force direction of the pull rod; during installation, the press-in nut is tightened, and a force is applied to the pull rod to push the positioning plate inward through the support plate, thereby stably installing the valve seat into the quick-closing valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0011] Figure 1 This is a schematic diagram of valve seat disassembly;

[0012] Figure 2 This is a schematic diagram of valve seat installation;

[0013] Figure 3 It is a schematic diagram of the positioning plate of the utility model;

[0014] Figure 4 It is a schematic diagram of the support plate of the utility model.

[0015] Among them: 1. Positioning plate; 2. Support plate; 3. Pull rod; 4. First guide screw; 5. Positioning nut; 6. Top loose nut; 7. Adjustment nut; 8. Second guide screw; 9. Press-in nut; 11. Valve seat; 13. Third threaded hole; 14. First through hole; 21. Second through hole; 22. Quick-closing valve. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0017] The specific implementation of the utility model will be described below in conjunction with the accompanying drawings:

[0018] like Figures 1 to 4The present invention shows a special tool for disassembling and assembling the valve seat 11 of a steam turbine quick-closing valve 22, comprising a positioning plate 1, a first guide screw 4, a support plate 2 and a second guide screw 8. A plurality of evenly spaced first guide screws 4 are provided on the circumference of the positioning plate 1, a plurality of first threaded holes matching the first guide screws 4 are provided on the circumference of the end face of the valve seat 11, and a first through hole 14 matching the first guide screw 4 is provided on the positioning plate 1. One end of the first guide screw 4 passes through the first through hole 14, is screwed into the first threaded hole and is provided with a positioning nut 5, and the positioning nut 5 is fitted with the end face of the positioning plate 1. The positioning plate 1 is detachably connected to the valve seat 11 in the quick-closing valve 22 through the first guide screw 4 and the positioning nut 5. The plurality of first guide screws 4 facilitate uniform application of external force to the valve seat 11, and facilitate smooth and smooth installation or removal of the valve seat 11.

[0019] The end surface of the quick-closing valve 22 is provided with a support plate 2, and a plurality of second threaded holes matching the second guide screw 8 are provided on the circumference of the end surface of the quick-closing valve 22, and a second through hole 21 matching the second guide screw 8 is provided on the support plate 2. One end of the second guide screw 8 passes through the second through hole 21, is screwed into the second threaded hole and is provided with a press-in nut 9, which fits the end surface of the support plate 2. The support plate 2 is detachably connected through the second guide screw 8 and the press-in nut 9.

[0020] The end surface of the support plate 2 is provided with a second through hole 21 that matches the first guide screw 4, the second guide screw 8 and the pull rod 3. The first guide screw 4 and the second guide screw 8 both penetrate the support plate 2. The first guide screw 4 is provided with an adjusting nut 7 on the side of the support plate 2 away from the quick-closing valve. When the valve seat 11 is disassembled or installed, it moves out of or enters the quick-closing valve 22 along the first guide screw 4. A pull rod 3 is provided in the middle of the support plate 2, one end of the pull rod 3 passes through the support plate 2 and is screwed into the positioning plate 1, and the other end is threadedly connected with the top loosening nut 6, and the top loosening nut 6 fits the support plate 2. When removing the valve seat 11, tighten the top loose nut 6, the pull rod 3 applies an outward pulling force to the positioning plate 1, and the positioning plate 1 applies a pulling force to the valve seat 11 through the pull rod 3, thereby pulling the valve seat 11 out along the moving direction of the first guide screw 4. During the pulling process, the force is uneven, and the length of the first guide screw 4 extending is different. The adjustment nut 7 on the first guide screw 4 can be used to apply an additional external force to the specified first guide screw 4, so that the extension lengths of each first guide screw 4 tend to be consistent, thereby ensuring that the valve seat 11 is pulled out smoothly. When installing the valve seat 11, the first guide screw 4 and the tension rod are close to the end of the support plate 2 with the support plate 2 as the symmetry plane. The valve seat 11 is fixedly connected to the positioning plate 1 through the other end of the first guide screw 4. The press-in nut 9 is tightened to apply an inward pressure to the support plate 2. The pressure is transmitted to the valve seat 11 through the pull rod 3 and the first guide screw 4, and the valve seat 11 is thus installed smoothly in the speed shut-off valve 22.

[0021] The working principle of the specific implementation mode of the utility model is as follows: when the valve seat 11 is disassembled, the valve seat 11 is fixedly connected to the positioning plate 1 through the first guide screw 4, and the end face of the quick-closing valve 22 is fixedly connected to the support plate 2 through the second guide screw 8. One side of the support plate 2 fits the end face of the quick-closing valve 22. One end of the pull rod 3 passes through the support plate 2 and is threadedly connected to the positioning plate 1. By tightening the top loose nut 6, the pull rod 3 applies an external pulling force to the positioning plate 1, and the valve seat 11 is thus separated from the quick-closing valve 22. When the valve seat 11 is installed, the valve seat 11 is fixedly connected to the positioning plate 1 through the first guide screw 4. One end of the second guide screw 8 is threadedly connected to the quick-closing valve 22, and the other end is provided with a support plate 2. A press-in nut 9 is provided on the side of the support plate 2 away from the quick-closing valve 22, and the press-in nut 9 is threadedly connected to the second guide screw 8. At this time, a locking nut is added to the end of the first guide screw 4 and the tension rod close to the support plate 2 with the support plate 2 as the symmetry plane. By tightening the press-in nut 9, the support plate 2 moves along the second guide screw 8. At the same time, the first guide screw 4 and the pull rod 3 apply inward pressure to the positioning plate 1, so that the valve seat 11 can be smoothly installed inside the quick-closing valve 22.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon. The terms "upper", "lower", "left", "right", "front", "rear" and similar expressions used herein are for illustrative purposes only.

[0023] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A special tool for disassembling and assembling a valve seat of a steam turbine quick-closing valve, characterized in that: It comprises a positioning plate (1), a first guide screw (4), a support plate (2) and a second guide screw (8); a plurality of the first guide screws (4) are evenly spaced on the circumference of the positioning plate (1); the positioning plate (1) is detachably connected to a valve seat (11) in a quick-closing valve (22) via the first guide screw (4); the end face of the quick-closing valve (22) is provided with the support plate (2); the support plate (2) is detachably connected via the second guide screw (8); the first guide screw (4) passes through the support plate (2); a pull rod (3) is provided in the middle of the support plate (2); one end of the pull rod (3) passes through the support plate (2) and is screwed into the positioning plate (1); the other end is threadedly connected to a top loosening nut (6); and the top loosening nut (6) fits the support plate (2).

2. The special tool for disassembling and assembling the valve seat of a steam turbine quick-closing valve according to claim 1, characterized in that: A plurality of first threaded holes matching the first guide screw (4) are provided on the circumference of the end surface of the valve seat (11), and a first through hole (14) matching the first guide screw (4) is provided on the positioning plate (1); one end of the first guide screw (4) passes through the first through hole (14), is screwed into the first threaded hole and is provided with a positioning nut (5), and the positioning nut (5) is in contact with the end surface of the positioning plate (1).

3. The special tool for disassembling and assembling the valve seat of a steam turbine quick-closing valve according to claim 1, characterized in that: A plurality of second threaded holes matching the second guide screw (8) are provided on the circumference of the end face of the quick-closing valve (22); a second through hole (21) matching the first guide screw (4) and the pull rod (3) is provided on the end face of the support plate (2); one end of the second guide screw (8) passes through the second through hole (21), is screwed into the second threaded hole and is provided with a press-in nut (9), and the press-in nut (9) fits the end face of the support plate (2).

4. The special tool for disassembling and assembling the valve seat of a steam turbine quick-closing valve according to claim 3, characterized in that: One end of the first guide screw (4) passes through the second through hole (21), and an adjusting nut (7) is provided on a side of the support plate (2) away from the quick-closing valve.

5. The special tool for disassembling and assembling the valve seat of a steam turbine quick-closing valve according to claim 3, characterized in that: The positioning plate (1) is provided with a third threaded hole (13), one end of the pull rod (3) is screwed into the third threaded hole (13), and the other end passes through the second through hole (21) and is threadedly connected to the top loose nut (6).

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