CN217019332U

CN217019332U - Flange centering device

Info

Publication number: CN217019332U
Application number: CN202122879817.9U
Authority: CN
Inventors: 张岩; 宋双喜; 张逸森; 吴正锐; 王磊
Original assignee: Huaneng Qinbei Power Generation Co Ltd
Current assignee: Huaneng Qinbei Power Generation Co Ltd
Priority date: 2021-11-23
Filing date: 2021-11-23
Publication date: 2022-07-22
Anticipated expiration: 2031-11-23

Abstract

The utility model discloses a flange centering device which comprises an L-shaped supporting plate and a supporting pin cylinder; l-shaped support plate: a transverse sliding opening is formed in the middle of the upper surface of the movable block, two movable blocks are connected inside the transverse sliding opening in a sliding mode, and fixing bolts are connected in vertical screw holes in the middle of the upper surfaces of the movable blocks in a threaded mode; supporting the pin cylinder: the support pin barrel is arranged at the lower end of the left side surface of the vertical plate body of the L-shaped support plate, an extension pin barrel is movably sleeved on the outer arc surface of the support pin barrel, and the highest point of the outer arc surface of the support pin barrel is flush with the highest point of the outer arc surface of the extension pin barrel; wherein: the lower ends of the fixing bolts are all in threaded connection with locking nuts; wherein: longitudinal screw holes which are uniformly distributed are formed in the front side surface and the rear side surface of the transverse plate body of the L-shaped supporting plate; this flange centering device can accomplish the centering work to the flange fast, and simple structure is practical, and low cost, and can satisfy the flange use of arbitrary axial thickness, and application scope is wider.

Description

Flange centering device

Technical Field

The utility model relates to the technical field of steam turbine auxiliary equipment, in particular to a flange centering device.

Background

The steam turbine is also called as a steam turbine engine, and is a rotary steam power device.A high-temperature high-pressure steam passes through a fixed nozzle to become an accelerated airflow and then is sprayed onto blades, so that a rotor provided with blade rows rotates, and simultaneously, the rotor does work outwards. Steam turbines are the main equipment of modern thermal power plants, and are also used in the metallurgical industry, chemical industry and ship power plants.

When the flanges of the steam guide pipes of the high and medium pressure cylinders of the steam turbine are disassembled and installed, the flanges are often dislocated and difficult to center due to factors such as pipeline deformation, so that the quality and the efficiency of installation or maintenance are influenced. At present, when a steam turbine set is overhauled in each large domestic power plant, a crowbar or a centering pin is usually adopted to center a flange when a steam guide pipe flange of a high and medium pressure cylinder is disassembled and assembled.

In the prior art, when a crow bar is adopted, force cannot be continuously applied to the flange due to limitation of manpower, the flange is poor in centering effect, the operation efficiency is low, and the manpower consumption is high. When centering is performed by adopting the centering pin, the centering pin is difficult to take out due to the fact that the flange is stiff, and the workload is increased, so that the flange centering device is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the existing defects, provides a flange centering device, can quickly finish the centering work of a flange, has simple and practical structure and low cost, can meet the use requirement of the flange with any axial thickness, has wider application range, and can effectively solve the problems in the background art.

In order to achieve the purpose, the utility model provides the following technical scheme: a flange centering device comprises an L-shaped supporting plate and a supporting pin cylinder;

l-shaped support plate: a transverse sliding opening is formed in the middle of the upper surface of the movable block, two movable blocks are connected inside the transverse sliding opening in a sliding mode, and fixing bolts are connected in vertical screw holes in the middle of the upper surfaces of the movable blocks in a threaded mode;

supporting the pin cylinder: it sets up in the left surface lower extreme of the vertical plate body of L shape backup pad, and the extrados movable sleeve of support pin section of thick bamboo is equipped with the extension pin section of thick bamboo, and the extrados peak of support pin section of thick bamboo flushes with the extrados peak of extending the pin section of thick bamboo, can accomplish the centering work to the flange fast, and simple structure is practical, and low cost, and can satisfy the flange use of arbitrary axial thickness, and application scope is wider.

Furthermore, the lower end of the fixing bolt is connected with a locking nut in a threaded mode, the vertical position of the fixing bolt can be locked, and the fixing bolt is prevented from being loosened due to overlarge stress in the follow-up centering process.

Further, evenly distributed's vertical screw is all seted up to the side around the horizontal plate body of L shape backup pad, and vertical screw all is linked together with horizontal sliding port, and the equal threaded connection in inside of vertical screw has the locking bolt, can realize the position locking to the movable block through frictional resistance to centering in-process movable block takes place the offset and influences centering quality.

Furthermore, the number of the locking bolts is eight, and the circle center distance between two transversely adjacent locking bolts is smaller than the transverse length of the movable block, so that the normal development of locking work can be ensured.

Further, all be equipped with the block rubber in the recess in side middle part around the movable block, the block rubber corresponds with the locking bolt position, can increase the frictional resistance between movable block and the locking bolt.

Furthermore, a push rod is connected in a transverse sliding hole in the lower end of the right side face of the L-shaped supporting plate in a sliding mode, the left end of the push rod extends into the supporting pin cylinder and is fixedly connected with the inner wall of the right side of the extending pin cylinder, and therefore personnel can conveniently judge whether the two flanges are successfully centered.

Furthermore, be equipped with the extension spring between the left surface of the vertical plate body of L shape backup pad and the left side inner wall of extending a round pin section of thick bamboo, the outside of push rod is located to the extension spring cover, can drive after the use is accomplished and extend a round pin section of thick bamboo and reset right automatically to the follow-up use of personnel.

Compared with the prior art, the utility model has the beneficial effects that: the flange centering device has the following advantages:

1. when the flange is centered, the supporting pin cylinder and the extending pin cylinder are inserted into the corresponding hole of the flange with the lower centering axis together, then the fixing bolt on the right side is screwed down to ensure that the fixing bolt on the right side is in tight contact with the flange with the lower centering axis, so that the device is fixed on the circumferential surface of the flange with the lower centering axis, then the locking nut on the right side is screwed down to lock the vertical position of the fixing bolt on the right side so as to prevent the fixing bolt on the right side from being loosened due to overlarge stress in the subsequent centering process, then the fixing bolt on the left side is screwed down to push the flange with the higher centering axis to a proper position, at the moment, a person can try to push the extending pin cylinder to the left through the push rod, whether the two flanges are centered successfully can be judged through the push result, then the locking nut on the left side is screwed down, so that the two flanges after centering keep the current state to provide convenience for the subsequent connection work, the extension pin barrel can be driven by the tension spring to automatically reset rightwards after use, so that the extension pin barrel can be conveniently used by people.

2. Before carrying out centering work, personnel can also two movable blocks of manual regulation at the inside relative position of horizontal sliding port, so that satisfy the flange of arbitrary axial thickness and use, application scope is wider, after position control accomplishes, personnel inwards screw up the locking bolt, make locking bolt and rubber block in close contact with, realize the position locking to the movable block through frictional resistance, in order to avoid centering in-process movable block to take place the offset and influence the centering quality, receive the distribution condition influence of locking bolt, no matter the movable block removes to any position, all have the locking bolt to correspond rather than the position all the time, ensure that locking work normally develoies.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged schematic view of the structure at the position A of the present invention;

FIG. 3 is a schematic view of the internal cross-section of the present invention.

In the figure: the device comprises a 1L-shaped supporting plate, 2 transverse sliding openings, 3 movable blocks, 4 fixing bolts, 5 supporting pin cylinders, 6 extending pin cylinders, 7 locking nuts, 8 locking bolts, 9 rubber blocks, 10 push rods and 11 tension springs.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

Referring to fig. 1-3, the present embodiment provides a technical solution: a flange centering device comprises an L-shaped support plate 1 and a support pin barrel 5;

l-shaped support plate 1: a transverse sliding opening 2 is formed in the middle of the upper surface of the device, two movable blocks 3 are connected to the inside of the transverse sliding opening 2 in a sliding mode, fixing bolts 4 are connected to vertical screw holes in the middle of the upper surface of each movable block 3 in a threaded mode, the fixing bolts 4 on the right side are screwed down, the fixing bolts 4 on the right side are made to be in close contact with a flange with a lower centering axis, and therefore the device is fixed on the circumferential surface of the flange with the lower centering axis;

supporting pin barrel 5: the device is arranged at the lower end of the left side face of a vertical plate body of an L-shaped supporting plate 1, an extension pin cylinder 6 is movably sleeved on the outer arc face of a supporting pin cylinder 5, the highest point of the outer arc face of the supporting pin cylinder 5 is flush with the highest point of the outer arc face of the extension pin cylinder 6, and when the flange is centered, the supporting pin cylinder 5 and the extension pin cylinder 6 are firstly inserted into a corresponding hole of a flange with a lower centering axis together to realize preliminary limiting of the device.

Wherein: the lower end of the fixing bolt 4 is connected with a locking nut 7 through threads, the locking nut 7 on the right side is screwed down, and the vertical position of the fixing bolt 4 on the right side is locked, so that the fixing bolt 4 on the right side is prevented from being loosened due to overlarge stress in the subsequent centering process.

Wherein: longitudinal screw holes which are uniformly distributed are formed in the front side surface and the rear side surface of a transverse plate body of the L-shaped supporting plate 1, the longitudinal screw holes are communicated with the transverse sliding port 2, locking bolts 8 are connected to the inner portions of the longitudinal screw holes in a threaded manner, the number of the locking bolts 8 is eight, the distance between the centers of circles of two transversely adjacent locking bolts 8 is smaller than the transverse length of each movable block 3, personnel can manually adjust the relative positions of the two movable blocks 3 in the transverse sliding port 2 before centering work is carried out so as to meet the use requirement of flanges with any axial thickness, the application range is wider, after position adjustment is finished, the personnel can inwards screw the locking bolts 8 to enable the locking bolts 8 to be in close contact with the rubber blocks 9, position locking of the movable blocks 3 is achieved through friction resistance, centering quality is prevented from being influenced by the distribution condition of the locking bolts 8 due to position deviation of the movable blocks 3 in the centering process, no matter the movable block 3 moves to any position, the locking bolt 8 can always correspond to the position of the movable block, and normal locking operation is guaranteed.

Wherein: all be equipped with the block rubber 9 in the recess at side middle part around the movable block 3, the block rubber 9 corresponds with locking bolt 8 position, can replace movable block 3 and locking bolt 8 to take place the contact, and then increase the frictional resistance between movable block 3 and the locking bolt 8.

Wherein: sliding connection has push rod 10 in the horizontal slide opening of L shape backup pad 1 right side lower extreme, and the left end of push rod 10 extends to the inside of support pin section of thick bamboo 5 and with the right side inner wall fixed connection who extends a round pin section of thick bamboo 6, personnel can try will extend round pin section of thick bamboo 6 propelling movement left through push rod 10, can judge through the propelling movement result whether two flanges are centering successfully.

Wherein: be equipped with extension spring 11 between the left surface of the vertical plate body of L shape backup pad 1 and the left side inner wall of extending a round pin section of thick bamboo 6, the outside of push rod 10 is located to extension spring 11 cover, and extension spring 11 can drive after the use is accomplished and extend a round pin section of thick bamboo 6 and reset right automatically to the follow-up use of personnel.

The working principle of the flange centering device provided by the utility model is as follows: when the flanges are centered, the supporting pin cylinder 5 and the extending pin cylinder 6 are inserted into a corresponding hole of a flange with a lower centering axis together, then the fixing bolt 4 on the right side is screwed down, so that the fixing bolt 4 on the right side is in tight contact with the flange with the lower centering axis, the device is fixed on the circumferential surface of the flange with the lower centering axis, then the locking nut 7 on the right side is screwed down, the vertical position of the fixing bolt 4 on the right side is locked, the phenomenon that the fixing bolt 4 on the right side is loosened due to overlarge stress in the subsequent centering process is avoided, then the fixing bolt 4 on the left side is screwed down to push the flange with the higher centering axis to a proper position, at the moment, a person can try to push the extending pin cylinder 6 to the left through the push rod 10, whether the two flanges are centered successfully can be judged according to the pushing result, then the locking nut 7 on the left side is screwed down, so that the two flanges after centering can keep the current state to provide convenience for the subsequent connection work, extension spring 11 can drive after the use is accomplished and extend a round pin section of thick bamboo 6 automatic right reset, so that the follow-up use of personnel, in addition, before carrying out centering work, personnel can also manually adjust two movable block 3 at the inside relative position of horizontal sliding port 2, so that satisfy the flange use of arbitrary axial thickness, application scope is wider, after position control accomplishes, personnel inwards tighten locking bolt 8, make locking bolt 8 and rubber block 9 in close contact with, realize the position locking to movable block 3 through frictional resistance, in order to avoid centering in-process movable block 3 to take place the offset and influence the centering quality, receive locking bolt 8's distribution condition influence, no matter movable block 3 removes to any position, locking bolt 8 all the time can correspond rather than the position, ensure that locking work normally develops.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields are included in the scope of the present invention.

Claims

1. A flange centering device which characterized in that: comprises an L-shaped support plate (1) and a support pin cylinder (5);

l-shaped support plate (1): a transverse sliding opening (2) is formed in the middle of the upper surface of the movable block, two movable blocks (3) are connected to the inner part of the transverse sliding opening (2) in a sliding mode, and fixing bolts (4) are connected to vertical screw holes in the middle of the upper surface of each movable block (3) in a threaded mode;

supporting pin cylinder (5): the support pin barrel is arranged at the lower end of the left side face of a vertical plate body of an L-shaped support plate (1), an extension pin barrel (6) is movably sleeved on the outer arc face of the support pin barrel (5), and the highest point of the outer arc face of the support pin barrel (5) is flush with the highest point of the outer arc face of the extension pin barrel (6).

2. A flange centering device as claimed in claim 1, wherein: the lower end of the fixing bolt (4) is connected with a locking nut (7) in a threaded manner.

3. A flange centering device as claimed in claim 1, wherein: longitudinal screw holes which are uniformly distributed are formed in the front side face and the rear side face of the transverse plate body of the L-shaped supporting plate (1), the longitudinal screw holes are communicated with the transverse sliding port (2), and locking bolts (8) are connected to the inner portions of the longitudinal screw holes in a threaded mode.

4. A flange centering device as claimed in claim 3, wherein: the number of the locking bolts (8) is eight, and the circle center distance between every two transversely adjacent locking bolts (8) is smaller than the transverse length of the movable block (3).

5. A flange centering device according to claim 3, wherein: all be equipped with rubber block (9) in the recess in side middle part around movable block (3), rubber block (9) correspond with locking bolt (8) position.

6. A flange centering device as claimed in claim 1, wherein: a push rod (10) is connected in a transverse sliding hole in the lower end of the right side face of the L-shaped supporting plate (1) in a sliding mode, and the left end of the push rod (10) extends to the inside of the supporting pin cylinder (5) and is fixedly connected with the inner wall of the right side of the extending pin cylinder (6).

7. A flange centering device according to claim 6, wherein: a tension spring (11) is arranged between the left side face of the vertical plate body of the L-shaped supporting plate (1) and the inner wall of the left side of the extending pin cylinder (6), and the tension spring (11) is sleeved outside the push rod (10).