Steam seal structure convenient to disassemble, assemble and adjust

Abstract

The utility model discloses a steam seal structure convenient to disassemble, assemble and adjust, which belongs to the field of steam seal and comprises an upper steam seal ring and a lower steam seal ring, a plurality of steam seal teeth are arranged on inner rings of the upper steam seal ring and the lower steam seal ring, a pair of positioning insertion plates are arranged on two sides of the front end and the rear end of the upper steam seal ring, and positioning insertion grooves corresponding to the positioning insertion plates are arranged on the upper end face of the lower steam seal ring. Additional plates are arranged at the positions, corresponding to the positioning inserting grooves, of the front end face and the rear end face of the lower steam seal ring, limiting straight plates are movably arranged on the rear end faces of the additional plates, limiting straight grooves are formed in the positions, corresponding to the limiting straight plates, of the bottoms of the positioning inserting plates, and adjusting grab handles are arranged on the front end faces of the additional plates. The top of the lower steam seal ring is provided with the corresponding positioning slot, the additional plate is mounted, and the adjusting grab handle in front of the additional plate is used for quick adjustment, so that the steam seal is more convenient to disassemble, assemble and adjust, and the overhaul, maintenance and replacement efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of steam seals, in particular to a steam seal structure which is convenient for disassembly, assembly and adjustment. Background Art

[0002] The steam seal is a device installed between the moving and static parts of the steam turbine to reduce or prevent steam leakage and air leakage into the vacuum side. The performance of the steam seal has an important impact on the economy and reliability of the unit. In order to reduce steam leakage losses and improve the safety and economy of the unit, it is very necessary to use advanced steam seal technology to transform the original traditional steam seal. Common steam seals are mostly fixed by screws, and a large number of screws are used. It takes a certain amount of time to install and disassemble. After the steam seal has been used for a period of time, steam leakage and other performance degradation may occur. At this time, it still takes a considerable amount of time to disassemble the steam seal, which affects the efficiency of steam seal inspection, replacement and maintenance, causing inconvenience. Utility Model Content

[0003] The main purpose of the utility model is to provide a steam seal structure which is easy to disassemble, assemble and adjust, and can effectively solve the problems in the background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A steam seal structure which is easy to disassemble, assemble and adjust, comprises an upper steam seal ring and a lower steam seal ring, the inner rings of the upper steam seal ring and the lower steam seal ring are both provided with a plurality of steam seal teeth, a pair of positioning plug plates are provided on both sides of the front and rear ends of the upper steam seal ring, a positioning slot is provided on the upper end surface of the lower steam seal ring corresponding to the positioning plug plate, additional plates are provided at the positions of the positioning slots on the front and rear end surfaces of the lower steam seal ring corresponding to the positioning slots, a limiting straight plate is movably provided on the rear end surface of the additional plate, a limiting straight groove is provided on the bottom of the positioning plug plate corresponding to the limiting straight plate, and an adjustment handle is provided on the front end surface of the additional plate.

[0006] Preferably, the additional plate is fixed to the lower steam sealing ring by welding, and a straight hole is provided on the front end surface of the lower steam sealing ring corresponding to the limiting straight plate, the straight hole passes through two positioning slots, and the head of the limiting straight plate passes through the limiting straight grooves at the bottom of the two positioning plug plates.

[0007] Preferably, a limiting hole is provided on the rear end surface of the additional plate corresponding to the limiting straight plate, an inner straight groove is provided behind the limiting hole, the tail of the limiting straight plate extends into the inner straight groove and is provided with a push plate, and the push plate is movably installed in the inner straight groove.

[0008] Preferably, a circular shaft is movably provided on the outer end surface of the push plate, a fixed plate is provided on the front wall of the inner straight groove, a spring is provided between the fixed plate and the push plate, and the circular shaft and the fixed plate are movably connected.

[0009] Preferably, protrusions are provided at the upper and lower ends of the outer ring of the circular shaft, an directional hole is provided in the middle of the fixing plate corresponding to the protrusion, and a special-shaped hole is provided on the front end surface of the additional plate corresponding to the circular shaft and the protrusion. The head of the circular shaft passes through the special-shaped hole and is fixedly connected to the adjustment handle. By installing a pair of protrusions on the outer ring of the circular shaft, the protrusion can pass through the directional hole and the special-shaped hole, and the position can be limited by rotating the circular shaft and the protrusion, so that the limiting straight plate remains fixed after being disengaged from the positioning plug plate, so as to facilitate independent adjustment by one person.

[0010] Preferably, an inner circular plate is provided at the tail of the circular shaft, a circular hole is provided on the front end surface of the push plate corresponding to the circular shaft, a built-in circular groove is provided behind the circular hole corresponding to the inner circular plate, and the inner circular plate is movably installed in the built-in circular groove.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] In the utility model, a pair of positioning plug plates are arranged on both sides of the front and rear end surfaces of the upper steam seal ring, a corresponding positioning slot is arranged on the top of the lower steam seal ring, and an additional plate is installed, and the adjustment handle in front of the additional plate is used for quick adjustment, so that the disassembly and assembly of the steam seal is more convenient, and the efficiency of inspection, maintenance and replacement is improved. A pair of protrusions are installed on the outer ring of the circular shaft, so that the protrusions can pass through the directional holes and the special-shaped holes, and the position can be limited by rotating the circular shaft and the protrusions, so that the limit straight plate and the positioning plug plate are separated and remain fixed, so as to facilitate independent adjustment by a single person. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a schematic diagram of a straight hole of the utility model;

[0015] Figure 3 This is a schematic diagram of the additional plate disassembly of the utility model;

[0016] Figure 4 It is a schematic diagram of the push plate disassembly of the utility model.

[0017] In the figure: 1. Upper steam seal ring; 2. Lower steam seal ring; 3. Positioning plug plate; 4. Positioning slot; 5. Straight hole; 6. Additional plate; 7. Limiting straight plate; 8. Limiting straight groove; 9. Adjustment handle; 10. Steam seal teeth; 11. Limiting hole; 12. Inner straight groove; 13. Push plate; 14. Round shaft; 15. Fixed plate; 16. Spring; 17. Bump; 18. Directional hole; 19. Special-shaped hole; 20. Inner round plate; 21. Round hole; 22. Built-in round groove. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0019] like Figure 1-4 As shown, a steam seal structure which is easy to disassemble, assemble and adjust comprises an upper steam seal ring 1 and a lower steam seal ring 2. The inner rings of the upper steam seal ring 1 and the lower steam seal ring 2 are both provided with a plurality of steam seal teeth 10. A pair of positioning plug plates 3 are provided on both sides of the front and rear ends of the upper steam seal ring 1. A positioning slot 4 is provided on the upper end surface of the lower steam seal ring 2 corresponding to the positioning plug plate 3. Additional plates 6 are provided on the front and rear end surfaces of the lower steam seal ring 2 corresponding to the positioning slot 4. A limiting straight plate 7 is movably provided on the rear end surface of the additional plate 6. A limiting straight groove 8 is provided on the bottom of the positioning plug plate 3 corresponding to the limiting straight plate 7. An adjustment handle 9 is provided on the front end surface of the additional plate 6.

[0020] In this embodiment, in order to effectively fix the positioning plug plate 3 and maintain the stability of the positioning plug plate 3 in the positioning slot 4, the additional plate 6 is fixed to the lower steam seal ring 2 by welding, and the front end surface of the lower steam seal ring 2 is provided with a straight hole 5 corresponding to the limiting straight plate 7, and the straight hole 5 passes through the two positioning slots 4, and the head of the limiting straight plate 7 passes through the limiting straight groove 8 at the bottom of the two positioning plug plates 3;

[0021] In this embodiment, in order to stably adjust the position of the limiting straight plate 7, thereby changing the fixed state of the positioning plug plate 3, a limiting hole 11 is provided on the rear end surface of the additional plate 6 corresponding to the limiting straight plate 7, an inner straight groove 12 is provided behind the limiting hole 11, the tail of the limiting straight plate 7 extends into the inner straight groove 12 and is provided with a push plate 13, the push plate 13 is movably installed in the inner straight groove 12, a round shaft 14 is movably provided on the outer end surface of the push plate 13, a fixing plate 15 is provided on the front wall of the inner straight groove 12, a spring 16 is provided between the fixing plate 15 and the push plate 13, and the round shaft 14 and the fixing plate 15 are movably connected;

[0022] In this embodiment, in order to ensure that the limiting straight plate 7 can remain stable after being adjusted outward, and to ensure that the limiting straight plates 7 at various locations can remain disengaged from the positioning plug plate 3, so as to facilitate the disassembly of the upper steam seal ring 1 and the lower steam seal ring 2, bumps 17 are provided at the upper and lower ends of the outer ring of the circular shaft 14, and a directional hole 18 is provided in the middle of the fixing plate 15 corresponding to the bump 17. A special-shaped hole 19 is provided on the front end surface of the additional plate 6 corresponding to the circular shaft 14 and the bump 17. The head of the circular shaft 14 passes through the special-shaped hole 19 and is fixedly connected to the adjusting handle 9. An inner circular plate 20 is provided at the tail of the circular shaft 14, and a circular hole 21 is provided on the front end surface of the push plate 13 corresponding to the circular shaft 14. A built-in circular groove 22 is provided behind the circular hole 21 corresponding to the inner circular plate 20, and the inner circular plate 20 is movably installed in the built-in circular groove 22.

[0023] It should be noted that the utility model is a steam seal structure that is easy to disassemble and adjust. In actual use, if it is found that the performance of the steam seal has changed, leakage or the like occurs, it can be disassembled and repaired as planned. When disassembling, first find the additional plate 6 at the front and rear of the lower steam seal ring 2, then grab the additional plate 6 and pull it outward, and the additional plate 6 drives the round shaft 14, the push plate 13 and the limit straight plate 7 to move together, and the push plate 13 slides along the inner straight groove 12, and squeezes the connected spring 16 when sliding, so that the spring 16 is compressed by force, and the round shaft 14 drives the convex block 17 of the outer ring to move at the same time, so that the convex block 17 passes through the directional hole 18 in the middle of the fixing plate 15, and then continues to pull until the convex block 17 is exposed through the special-shaped hole 19 on the surface of the additional plate 6. At this time, the convex block 17 is located at the outer side of the additional plate 6, and then the adjustment handle 9 can be rotated to drive it The circular shaft 14 rotates, and the circular shaft 14 drives the connected inner circular plate 20 to rotate in the built-in circular groove 22. When it rotates to about ninety degrees, the adjusting handle 9 can be loosened to make it move inward under the action of elastic force. Since the protrusion 17 also rotates at the same angle, the protrusion 17 cannot pass through the special-shaped hole 19 and enter the interior of the additional plate 6, thereby keeping the circular shaft 14, the push plate 13 and the limit straight plate 7 in a fixed state. At this time, the limit straight plate 7 has followed the movement and disengaged from the two positioning plug plates 3. Then, the adjusting handles 9 at various locations can be adjusted in the same way to make all the limit straight plates 7 disengage from the positioning plug plates 3. Then, the SAIC sealing ring 1 can be lifted, so that it drives the positioning plug plates 3 to lift and disengage from the positioning slots 4, and then the SAIC sealing ring 1 can be removed. Then, subsequent debugging operations such as inspection, maintenance, and replacement can be carried out to improve the inspection and maintenance effect of the steam seal.

[0024] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A steam seal structure that is easy to disassemble, assemble and adjust, comprising an upper steam seal ring (1) and a lower steam seal ring (2), wherein the inner rings of the upper steam seal ring (1) and the lower steam seal ring (2) are both provided with a plurality of steam seal teeth (10), characterized in that: A pair of positioning plug plates (3) are provided at both sides of the front and rear ends of the upper steam seal ring (1); a positioning slot (4) is provided at the upper end surface of the lower steam seal ring (2) corresponding to the positioning plug plate (3); additional plates (6) are provided at the positions of the front and rear end surfaces of the lower steam seal ring (2) corresponding to the positioning slot (4); a limiting straight plate (7) is movably provided at the rear end surface of the additional plate (6); a limiting straight groove (8) is provided at the bottom of the positioning plug plate (3) corresponding to the limiting straight plate (7); and an adjustment handle (9) is provided at the front end surface of the additional plate (6).

2. A steam seal structure that is easy to disassemble and adjust according to claim 1, characterized in that: The additional plate (6) is fixed to the lower steam seal ring (2) by welding, and a straight hole (5) is provided on the front end surface of the lower steam seal ring (2) corresponding to the limiting straight plate (7), and the straight hole (5) passes through two positioning slots (4), and the head of the limiting straight plate (7) passes through the limiting straight grooves (8) at the bottom of the two positioning plug plates (3).

3. The steam seal structure that is easy to disassemble and adjust according to claim 1 is characterized in that: A limiting hole (11) is provided on the rear end surface of the additional plate (6) corresponding to the limiting straight plate (7); an inner straight groove (12) is provided behind the limiting hole (11); the rear end of the limiting straight plate (7) extends into the inner straight groove (12) and is provided with a push plate (13); the push plate (13) is movably installed in the inner straight groove (12).

4. A steam seal structure that is easy to disassemble and adjust according to claim 3, characterized in that: A circular shaft (14) is movably provided on the outer end surface of the push plate (13), a fixing plate (15) is provided on the front wall of the inner straight groove (12), a spring (16) is provided between the fixing plate (15) and the push plate (13), and the circular shaft (14) and the fixing plate (15) are movably connected.

5. A steam seal structure that is easy to disassemble and adjust according to claim 4, characterized in that: The upper and lower ends of the outer ring of the circular shaft (14) are provided with protrusions (17); the middle part of the fixing plate (15) is provided with a directional hole (18) corresponding to the protrusion (17); the front end surface of the additional plate (6) is provided with a special-shaped hole (19) corresponding to the circular shaft (14) and the protrusion (17); the head of the circular shaft (14) passes through the special-shaped hole (19) and is fixedly connected to the adjustment handle (9).

6. A steam seal structure that is easy to disassemble and adjust according to claim 5, characterized in that: An inner circular plate (20) is arranged at the rear of the circular shaft (14); a circular hole (21) is arranged at the front end surface of the push plate (13) corresponding to the circular shaft (14); a built-in circular groove (22) is arranged behind the circular hole (21) corresponding to the inner circular plate (20); and the inner circular plate (20) is movably installed in the built-in circular groove (22).

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