Stable hoisting support for overhauling auxiliary machine equipment of steam turbine

Abstract

The stable hoisting support comprises a fixing disc, three supporting legs which are arranged in a circumferential mode are arranged on the periphery of the bottom of the fixing disc, a fixing part used for preventing the supporting legs from rotating is arranged at the bottom of the fixing disc, and adjusting parts used for changing the height of the fixing disc are arranged at the bottoms of the supporting legs. The fixing part comprises three fixing plates which are arranged at the bottom of the fixing disc in a circumferential mode, movable cavities formed in the fixing plates and sliding openings formed in one sides of the movable cavities. Through the arrangement of the fixing disc, the supporting legs and the fixing part, the problems that in the steam turbine auxiliary equipment overhauling process, hoisting points do not exist, and the hoisting efficiency is high are solved; a maintainer can only use a pipeline support hanger as a lifting point, but the pipeline support hanger is not necessarily positioned right above a lifted object, so that the lifting operation is not facilitated, or the maintainer can weld a temporary lifting point above equipment and dismantle the temporary lifting point after the maintenance is finished, so that the workload is greatly increased, and the shutdown maintenance time is wasted.

Description

Technical Field

[0001] The invention relates to the technical field of brackets, and in particular to a stable hoisting bracket used for the maintenance of auxiliary equipment of a steam turbine. Background Art

[0002] A steam turbine, also known as a steam turbine engine, is a rotary steam power device. High-temperature and high-pressure steam passes through a fixed nozzle and becomes an accelerated airflow, which is then sprayed onto the blades, causing the rotor with the blades to rotate and perform work externally. Steam turbines are the main equipment in modern thermal power plants and are also used in the metallurgical industry, chemical industry, and ship power devices.

[0003] Steam turbine maintenance is an important means to ensure the safe operation of steam turbines. During the maintenance process of steam turbines, the main equipment operating floor is equipped with a crane for lifting and maintenance. The operating floors of other auxiliary equipment are not equipped with cranes. Although the maintenance of auxiliary equipment does not require a crane for lifting, the auxiliary equipment often needs to be lifted by hand winches during the maintenance process, such as the electric head of a large valve, pipes that need to be replaced, large motors, etc. At present, the common practice of maintenance personnel is to use pipe supports and hangers as lifting points or weld a temporary lifting point. The disadvantage of this practice is that the pipe supports and hangers may not be directly above the lifting object, which is not convenient for lifting operations. Welding temporary lifting points increases the workload and wastes maintenance time. Some maintenance personnel even violate the "Electric Power Safety Work Regulations" and use pipes and scaffolding as lifting points for lifting operations, which increases work risks and is not conducive to the company's anti-violation work.

[0004] Although there are lifting brackets for sale on the market, they are not suitable for the maintenance of steam turbine auxiliary equipment. The lifting of steam turbine auxiliary equipment does not require lifting of particularly heavy equipment. Generally, a 2-ton hand chain hoist can meet all work needs. Steam turbine auxiliary equipment is located in various places in the steam turbine room. The equipment is numerous and scattered, and the lifting bracket needs to be easy to carry. The location of steam turbine auxiliary equipment is complex, and the fixed height lifting bracket may be unable to be used due to other equipment or pipelines above the equipment, so the lifting bracket needs to adjust the height according to the actual situation. Summary of the invention

[0005] The purpose of the present invention is to provide a stable lifting bracket for the maintenance of steam turbine auxiliary equipment, so as to solve the problem that there is no lifting point during the maintenance of steam turbine auxiliary equipment mentioned in the above background technology, and the maintenance personnel can only use the pipe support and hanger as the lifting point, but the pipe support and hanger may not be directly above the lifting object, which is not conducive to the lifting operation, or the maintenance personnel will weld a temporary lifting point above the equipment and remove it after the maintenance is completed. This practice greatly increases the workload and wastes the downtime maintenance time. The present invention can be used as a lifting point, and a hand winch is hung on the bracket hook for lifting operations; the location environment of the steam turbine auxiliary equipment is complex, and there will be other equipment or pipelines above the equipment that affect the placement of the lifting point. The three legs of the present invention can be adjusted in height according to the actual situation on site to adapt to the on-site environment; the maintenance site of the steam turbine auxiliary equipment is scattered in various places in the steam engine room, and the lifting point needs to be transported to various work sites as the work task is carried out. The three legs of the present invention can be fixed after being reset to prevent the legs from opening again during the transportation process, which is convenient for manual transportation.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a stable hoisting bracket for maintenance of steam turbine auxiliary equipment, comprising a fixed plate, three legs arranged in a circumference are respectively arranged around the bottom of the fixed plate, a fixing component for preventing the legs from rotating is provided at the bottom of the fixed plate, an adjusting component for changing the height of the fixed plate is provided at the bottom of the legs, and the legs are hinged to the fixed plate; The fixing components include three fixing plates arranged in a circle at the bottom of the fixing disk, a movable cavity opened in the fixing plate, a sliding opening opened on one side of the movable cavity, a driving plate connected to the two sides of the sliding opening, a bidirectional screw connected to the driving plate, a torsion plate connected to both ends of the bidirectional screw, and a positioning plate connected to one side of the driving plate, the bidirectional screw is screwed to the driving plate, the bidirectional screw is rotatably connected to the fixing plate, and the driving plate is slidably connected to the sliding opening.

[0007] Preferably, the adjustment component includes an extension leg, a screw rod connected to the bottom of the leg, a movable plate connected to the outside of the screw rod, an extension slot opened at the top of the extension leg, connecting slots respectively opened on both sides of the extension slot, and connecting blocks respectively connected to both sides of the movable plate, the connecting block is slidably connected to the connecting slot, the screw rod is screwed to the movable plate, and the movable plate is slidably connected to the extension slot.

[0008] Preferably, a stop groove is provided on one side of the movable cavity, a stop block is slidably connected in the stop groove, and the stop block is fixedly connected to the driving plate.

[0009] Preferably, a support seat is provided at the bottom of the extension leg, an anti-skid plate is fixedly connected to the bottom of the support seat, the anti-skid plate is provided with anti-skid patterns, and the extension leg is hinged to the support seat.

[0010] Preferably, a limit plate is provided at one end of the screw rod, and the limit plate is fixedly connected to the screw rod.

[0011] Preferably, an anti-skid pad is provided on the inner wall of the positioning plate, and the anti-skid pad is fixedly connected to the positioning plate.

[0012] Preferably, the anti-rotation block is in an I-shape, and the anti-rotation groove is in a T-shape.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting a fixed plate, legs and fixing parts, the three legs are reset and located below the fixed plate. By twisting the twisting plate, the twisting plate can drive the bidirectional screw to rotate. The rotation of the bidirectional screw can drive the two driving plates to move in the opposite direction, and then drive the two positioning plates to move. The movement of the positioning plate can fix the legs, preventing the legs from opening at will when carrying the bracket, which affects the transportation, and greatly improves the practicality of the device; 2. By providing an adjustment component, the extension leg can be rotated, thereby changing the distance between the extension leg and the support leg, adjusting the length of the support leg, and controlling the use height of the fixed plate, which can facilitate the lifting of objects of different heights and improve the scope of application. The support seat can support the extension leg and the support leg, and the anti-slip plate and anti-slip pattern can increase the friction and improve the stability of the bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the three-dimensional structure provided by the present invention.

[0015] Figure 2 The left side view provided by the present invention.

[0016] Figure 3 The present invention provides Figure 2 Three-dimensional cross-section view at AA in the middle.

[0017] Figure 4 The present invention provides Figure 3 Enlarged view of point C in the middle.

[0018] Figure 5 The present invention provides Figure 2 Three-dimensional cross-section view at the middle BB.

[0019] Figure 6 The present invention provides Figure 5 Enlarged view of point D in the middle.

[0020] In the figure: 1. fixed plate; 11. support leg; 21. fixed plate; 22. movable cavity; 23. sliding port; 24. drive plate; 25. bidirectional screw; 26. torsion plate; 27. positioning plate; 31. extension leg; 32. screw rod; 33. movable plate; 34. extension slot; 35. connecting slot; 36. connecting block; 41. anti-rotation slot; 42. anti-rotation block; 51. support seat; 52. anti-slip plate; 53. anti-slip pattern; 271. anti-slip pad; 321. limit plate. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this document, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this document.

[0022] See also Figure 1 , Figure 2 , Figure 3 as well as Figure 4The present invention provides a technical solution: a stable lifting bracket for the maintenance of auxiliary equipment of a steam turbine, comprising a fixed plate 1, three legs 11 arranged in a circumference are respectively arranged around the bottom of the fixed plate 1, a fixing component for preventing the legs 11 from rotating is provided at the bottom of the fixed plate 1, an adjusting component for changing the height of the fixed plate 1 is provided at the bottom of the legs 11, the legs 11 are hinged to the fixed plate 1, and the fixing component comprises three fixing plates 21 arranged in a circumference at the bottom of the fixed plate 1, an active cavity 22 opened in the fixing plate 21, and a fixing component opened on one side of the active cavity 22. The sliding opening 23, the driving plate 24 respectively connected to the two sides of the sliding opening 23, the bidirectional screw 25 connected to the driving plate 24, the torsion plate 26 respectively connected to the two ends of the bidirectional screw 25 and the positioning plate 27 connected to one side of the driving plate 24, the bidirectional screw 25 is screwed to the driving plate 24, the bidirectional screw 25 is rotatably connected to the fixing plate 21, the driving plate 24 is slidably connected to the sliding opening 23, the leg 11 is opened to stably support the bracket, and when the leg 11 is reset and stored, the torsion plate 26 is rotated, and the torsion plate 26 can drive the bidirectional screw 25 to rotate. The rotation of the bidirectional screw 25 can drive the two driving plates 24 to move in opposite directions, and the driving plate 24 can drive the positioning plate 27 to move. The movement of the positioning plate 27 can fix the support leg 11, thereby preventing the support leg 11 from opening, which can facilitate the transportation of the entire bracket. A stop groove 41 is provided on one side of the movable cavity 22, and a stop block 42 is slidably connected in the stop groove 41. The stop block 42 is fixedly connected to the driving plate 24, and the stop block 42 can move synchronously with the driving plate 24, which can prevent the driving plate 24 from rotating, thereby ensuring that the positioning plate 27 moves stably. Qualitatively, the positioning plate 27 can facilitate fixing the leg 11, the shape of the anti-slip block 42 is I-shaped, and the shape of the anti-slip groove 41 is T-shaped, which can facilitate the anti-slip block 42 to slide in the anti-slip groove 41, thereby preventing the anti-slip block 42 from escaping from the anti-slip groove 41, and the anti-slip block 42 can be limited. The inner wall of the positioning plate 27 is provided with an anti-slip pad 271, and the anti-slip pad 271 is fixedly connected to the positioning plate 27. The anti-slip pad 271 can increase the friction between the positioning plate 27 and the leg 11, thereby improving the fixing stability of the leg 11 and effectively preventing the leg 11 from rotating.

[0023] See also Figure 1 , Figure 2 , Figure 5 as well as Figure 6The adjustment component includes an expansion leg 31, a screw rod 32 connected to the bottom of the leg 11, a movable plate 33 connected to the outside of the screw rod 32, an expansion slot 34 opened at the top of the expansion leg 31, connecting slots 35 respectively opened on both sides of the expansion slot 34, and connecting blocks 36 respectively connected to both sides of the movable plate 33, the connecting block 36 is slidably connected to the connecting slot 35, the screw rod 32 is screwed to the movable plate 33, the movable plate 33 is slidably connected to the expansion slot 34, the movable plate 33 and the screw rod 32 can connect the expansion leg 31 and the leg 11, the rotation of the expansion leg 31 can make the movable plate 33 move, the movement of the movable plate 33 drives the connecting block 36 and the expansion leg 31 to move, the expansion leg 31 can extend the length of the leg 11, and can be In order to change the height of the bracket, improve the scope of application, and facilitate lifting objects of different heights, a support seat 51 is provided at the bottom of the extension leg 31, and an anti-skid plate 52 is fixedly connected to the bottom of the support seat 51, and an anti-skid plate 52 is provided on the anti-skid plate 53. The extension leg 31 is hinged to the support seat 51, and the support seat 51 can support the extension leg 31 and the support leg 11. The anti-skid plate 52 and the anti-skid pattern 53 can increase the friction between the ground, thereby improving the stability of the entire bracket. A limit plate 321 is provided at one end of the screw rod 32, and the limit plate 321 is fixedly connected to the screw rod 32. The limit plate 321 can limit the moving distance of the extension leg 31 to prevent the extension leg 31 from detaching from the screw rod 32, thereby preventing the extension leg 31 from detaching from the support leg 11.

[0024] Working principle: during operation, the torsion plate 26 is rotated, and the torsion plate 26 can drive the bidirectional screw 25 to rotate. The rotation of the bidirectional screw 25 can drive the two driving plates 24 to move to both sides. The driving plate 24 can drive the positioning plate 27 away from the leg 11, and the leg 11 can be released. Then, the three legs 11 are opened, and then the height of the fixed plate 1 is adjusted according to the height of the object. By rotating the extension leg 31, the rotation of the extension leg 31 can drive the moving plate 33 to move, and then the length of the leg 11 can be changed and adjusted to a suitable length. Then, the anti-slip plate 52 at the bottom of the support seat 51 is in contact with the ground, which can support the bracket and improve its stability. After the lifting is completed, the leg 11 is reset, and then the torsion plate 26 is rotated in the opposite direction, which can drive the bidirectional screw 25 to rotate in the opposite direction, and then the two positioning plates 27 can be moved to the middle. The movement of the positioning plate 27 can fix the leg 11 to prevent it from opening, which is convenient for carrying the lifting bracket. The above is the working process of the entire device, and the contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0025] 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 stable hoisting bracket for maintenance of steam turbine auxiliary equipment, comprising a fixing plate (1), characterized in that: Three supporting legs (11) arranged in a circle are respectively provided around the bottom of the fixing plate (1); a fixing component for preventing the supporting legs (11) from rotating is provided at the bottom of the fixing plate (1); an adjusting component for changing the height of the fixing plate (1) is provided at the bottom of the supporting legs (11); and the supporting legs (11) are hingedly connected to the fixing plate (1); The fixing component comprises three fixing plates (21) respectively arranged at the bottom of the fixing plate (1) in a circumferential arrangement, a movable cavity (22) opened in the fixing plate (21), a sliding opening (23) opened at one side of the movable cavity (22), a driving plate (24) respectively connected to the two sides of the sliding opening (23), a bidirectional screw (25) connected to the driving plate (24), a twisting plate (26) respectively connected to both ends of the bidirectional screw (25), and a positioning plate (27) connected to one side of the driving plate (24), the bidirectional screw (25) being screwed to the driving plate (24), the bidirectional screw (25) being rotationally connected to the fixing plate (21), and the driving plate (24) being slidingly connected to the sliding opening (23).

2. A stable hoisting bracket for maintenance of steam turbine auxiliary equipment according to claim 1, characterized in that: The adjustment component comprises an extension leg (31), a screw rod (32) connected to the bottom of the support leg (11), a movable plate (33) connected to the outer side of the screw rod (32), an extension slot (34) provided at the top of the extension leg (31), connecting slots (35) respectively provided at two sides of the extension slot (34), and connecting blocks (36) respectively connected to two sides of the movable plate (33), wherein the connecting block (36) is slidably connected to the connecting slot (35), the screw rod (32) is screwed to the movable plate (33), and the movable plate (33) is slidably connected to the extension slot (34).

3. The stable hoisting bracket for maintenance of steam turbine auxiliary equipment according to claim 1 is characterized in that: A rotation-stop groove (41) is provided on one side of the movable cavity (22), a rotation-stop block (42) is slidably connected in the rotation-stop groove (41), and the rotation-stop block (42) is fixedly connected to the driving plate (24).

4. A stable hoisting bracket for maintenance of steam turbine auxiliary equipment according to claim 2, characterized in that: A support seat (51) is provided at the bottom of the expansion leg (31), an anti-slip plate (52) is fixedly connected to the bottom of the support seat (51), anti-slip grooves (53) are provided on the anti-slip plate (52), and the expansion leg (31) is hinged to the support seat (51).

5. The stable hoisting bracket for maintenance of steam turbine auxiliary equipment according to claim 2 is characterized in that: A limiting plate (321) is provided at one end of the screw rod (32), and the limiting plate (321) is fixedly connected to the screw rod (32).

6. The stable hoisting bracket for maintenance of steam turbine auxiliary equipment according to claim 1 is characterized in that: An anti-skid pad (271) is provided on the inner wall of the positioning plate (27), and the anti-skid pad (271) is fixedly connected to the positioning plate (27).

7. The stable hoisting bracket for maintenance of steam turbine auxiliary equipment according to claim 3 is characterized in that: The anti-rotation block (42) is in an I-shape, and the anti-rotation groove (41) is in a T-shape.

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