CN113643876A

CN113643876A - Safe radiating transformer

Info

Publication number: CN113643876A
Application number: CN202111034904.2A
Authority: CN
Inventors: 孙建辉; 程建博; 何涛; 唐志军; 龚坤
Original assignee: Jiangxi Mingzheng Transformation Equipment Co ltd
Current assignee: Jiangxi Mingzheng Transformation Equipment Co ltd
Priority date: 2021-09-04
Filing date: 2021-09-04
Publication date: 2021-11-12
Anticipated expiration: 2041-09-04
Also published as: CN113643876B

Abstract

The invention discloses a safe heat-radiating transformer which comprises a bottom plate, wherein the top of the bottom plate is fixedly connected with a transformer main body, the left side and the right side of the transformer main body are fixedly connected with two connecting blocks, two connecting assemblies are arranged between the four connecting blocks and the bottom plate, the top of the bottom plate is fixedly connected with a water pump and a cooling liquid tank, and the water pump and the cooling liquid tank are positioned on the front side of the transformer main body. The transformer main body is fixed and supported through the bottom plate, the connecting block and the bottom plate are fixedly connected with the connecting end of the connecting component through the bolt, then the connecting component is fixed on the mounting bracket, and the tensioning degree of the transformer main body can be adjusted through the connecting component, so that the transformer main body fixing device has the advantages of being good in heat dissipation performance, enabling transformer oil to be kept static, being safer, saving mounting accessories and being more convenient to mount and operate.

Description

Safe radiating transformer

Technical Field

The invention relates to the field of transformers, in particular to a transformer capable of safely dissipating heat.

Background

The oil-immersed distribution transformer is one of important devices in power supply and distribution systems of industrial and mining enterprises and civil buildings, and transformer oil is petroleum liquid, has the possibility of combustion and has the defects in the aspect of environmental protection. However, due to the characteristics of excellent performance and low price of transformer oil, most power transformers still use transformer oil as insulating and cooling medium.

But current oil-immersed transformer, the mode that adopts the inside and outside circulation of fluid to carry out the heat and gives off mostly, this kind of mode, because the heat dispersion of fluid is relatively poor, and transformer oil can produce certain impact force to the inside component of transformer when flowing in inside, cause the component to damage in the past easily for a long time, take place the incident, and need carry out a large amount of accessory equipment when the installation, the installation is very troublesome, the operation is inconvenient, barrier propterty is not good, be not convenient for maintain, therefore we propose a safe radiating transformer and be used for solving above problem.

Disclosure of Invention

In view of the problems in the prior art, the present invention is directed to a transformer with safe heat dissipation.

In order to realize the scheme, the invention adopts the following technical scheme.

A transformer capable of safely dissipating heat comprises a bottom plate, wherein a transformer main body is fixedly connected to the top of the bottom plate, two connecting blocks are fixedly connected to the left side and the right side of the transformer main body, two connecting assemblies are arranged between the four connecting blocks and the bottom plate, a water pump and a cooling liquid tank are fixedly connected to the top of the bottom plate, the water pump and the cooling liquid tank are positioned on the front surface of the transformer main body, the input end of the water pump is fixedly connected with the cooling liquid tank through a pipeline, the output end of the water pump penetrates through and is fixedly connected to the inside of the transformer main body through a pipeline, a heat exchange pipe is fixedly connected to the inside of the transformer main body, the output end of the water pump is communicated with the inlet end of the heat exchange pipe through a pipeline, the bottom end of the heat exchange pipe penetrates through and is fixedly connected to the bottom of the transformer main body, a cooling mechanism is arranged at the bottom of the transformer main body, the inlet end of the cooling mechanism is fixedly connected with the bottom end of the heat exchange tube, and the outlet end of the cooling mechanism is communicated with the interior of the cooling liquid tank through a pipeline.

As a further description of the above technical solution: the connecting assembly comprises two horizontal pull rods, a vertical diagonal pull rod and an adjusting assembly, wherein one end of each horizontal pull rod is fixedly connected to the two connecting blocks through bolts respectively, the other end of each horizontal pull rod is matched with the adjusting assembly in a hinged mode, one end of each vertical diagonal pull rod is hinged to the adjusting assembly, and the other end of each vertical diagonal pull rod is fixedly connected to one side of the bottom plate through bolts.

As a further description of the above technical solution: the adjusting part comprises a hinged block, an installation block, a connecting bolt and an adjusting nut, one side of the hinged block is hinged to one end of two horizontal pull rods and one end of a vertical diagonal pull rod, one side of the installation block is fixedly connected with one end of the connecting bolt, the other end of the connecting bolt penetrates through and is in threaded connection with one side, far away from the installation block, of the hinged block, the inner thread of the adjusting nut is connected to the outer side of the connecting bolt, the adjusting nut is located on one side of the hinged block, the adjusting nut is in close contact with one side, opposite to the hinged block, of the adjusting nut.

As a further description of the above technical solution: all fixedly connected with heating panels around the transformer main part, the inside injection of transformer main part has transformer oil.

As a further description of the above technical solution: the side-view section of the heat exchange tube is in a shape of Chinese character 'hui', and two arc-shaped ear tubes are fixedly connected to the outer side of the heat exchange tube.

As a further description of the above technical solution: cooling body includes screw thread cooling tube and cooling fan, logical groove has been seted up to the inside of bottom plate, cooling fan's outside fixed connection to leads to the inside in groove, the bottom and the cooling fan fixed connection of screw thread cooling tube, the entry end of screw thread cooling tube and hot exchange tube's bottom fixed connection, the exit end and the coolant liquid case fixed connection of screw thread cooling tube.

As a further description of the above technical solution: urgent protection machanism includes two fixed blocks, two end brackets and four buffering subassemblies, two one side that the fixed block is relative respectively with the both ends fixed connection of end bracket, the dashpot has been seted up at the top of end bracket, four the bottom of buffering subassembly cooperatees with two dashpots respectively, four the buffering subassembly distributes respectively in the four corners department of bottom plate bottom.

As a further description of the above technical solution: the buffer assembly comprises a connecting rod, a movable block and a buffer spring, the top end of the connecting rod is hinged to the bottom of the bottom plate, the bottom end of the connecting rod is hinged to the top of the movable block, the bottom of the movable block is slidably connected to the inside of the buffer groove, one side of the movable block is fixedly connected with the buffer spring, and the other end of the buffer spring is fixedly connected with the inner wall of the buffer groove.

Compared with the prior art, the invention has the advantages that:

(1) the scheme is characterized in that the connecting block and the bottom plate are fixedly connected with the connecting end of the connecting component through the bolt, then the connecting component is fixed on the mounting bracket, the tensioning degree of the transformer main body can be adjusted through the connecting component, the fastening purpose is achieved, under the condition of ensuring stability, accessories are saved, the mounting operation is more convenient and faster, the water pump is started to pump out the cooling liquid in the cooling liquid tank and convey the cooling liquid into the heat exchange tube in the transformer main body, when the cooling liquid passes through the heat exchange tube, the heat in the transformer oil is absorbed, then the cooling liquid absorbing the heat flows into the cooling mechanism, the cooling mechanism quickly dissipates the heat carried by the cooling liquid to the outside, then the cooling liquid returns to the inside of the cooling liquid tank, thereby forming circulating cooling, further realizing that the device has better heat dissipation performance, and the transformer oil is kept static, the safety is higher, installation accessories are saved, the installation and operation are more convenient, the protection effect is good, and the maintenance is convenient.

(2) This scheme is through fixing the fixed block under the outer support equally for four buffering subassemblies of bottom bracket cooperation play the effect that a prevention dropped the buffering to the bottom plate, when the bottom plate whereabouts, can promote four buffering subassemblies and compress respectively and along the inside horizontal motion of spout, play the buffering protection to bottom plate and transformer main part, make the installation security of device promote by a wide margin, and also make things convenient for dismantling the maintenance to coupling assembling, need not to dismantle whole device, it is convenient safety more to maintain.

Drawings

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

FIG. 2 is a schematic side view of the cross-sectional structure of the present invention;

FIG. 3 is a schematic top view of the present invention;

fig. 4 is a schematic bottom view of the threaded heat pipe of the present invention.

The reference numbers in the figures illustrate:

1. a base plate; 2. a transformer body; 3. connecting blocks; 4. a connecting assembly; 41. a horizontal pull rod; 42. a vertical diagonal member; 43. an adjustment assembly; 431. a hinged block; 432. mounting blocks; 433. a connecting bolt; 434. adjusting the nut; 5. a water pump; 6. a coolant tank; 7. a heat exchange tube; 71. an arc ear tube; 8. a cooling mechanism; 81. a threaded radiating pipe; 82. a heat radiation fan; 9. a heat dissipation plate; 10. a through groove; 11. an emergency protection mechanism; 111. a fixed block; 112. a bottom bracket; 113. a buffer assembly; 114. a buffer tank; 1131. a connecting rod; 1132. a movable block; 1133. a buffer spring.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention;

referring to fig. 1 to 4, in the invention, a transformer for safe heat dissipation comprises a bottom plate 1, a transformer main body 2 is fixedly connected to the top of the bottom plate 1, two connecting blocks 3 are fixedly connected to both the left and right sides of the transformer main body 2, two connecting assemblies 4 are arranged between the four connecting blocks 3 and the bottom plate 1, a water pump 5 and a coolant tank 6 are fixedly connected to the top of the bottom plate 1, the water pump 5 and the coolant tank 6 are positioned on the front side of the transformer main body 2, the input end of the water pump 5 is fixedly connected to the coolant tank 6 through a pipeline, the output end of the water pump 5 penetrates through and is fixedly connected to the inside of the transformer main body 2 through a pipeline, a heat exchange pipe 7 is fixedly connected to the inside of the transformer main body 2, the output end of the water pump 5 is communicated with the inlet end of the heat exchange pipe 7 through a pipeline, and the bottom end of the heat exchange pipe 7 penetrates through and is fixedly connected to the bottom of the transformer main body 2, the bottom of the transformer main body 2 is provided with a cooling mechanism 8, the inlet end of the cooling mechanism 8 is fixedly connected with the bottom end of the heat exchange tube 7, and the outlet end of the cooling mechanism 8 is communicated with the inside of the cooling liquid tank 6 through a pipeline.

In the invention, a transformer main body 2 is fixed and supported by a bottom plate 1, a connecting block 3 and the bottom plate 1 are fixedly connected with a connecting end of a connecting component 4 by bolts, then the connecting component 4 is fixed on a mounting bracket, the tensioning degree of the transformer main body 2 can be adjusted by the connecting component 4 to achieve the purpose of fastening, under the condition of ensuring stability, accessories are saved, the mounting operation is more convenient and faster, a water pump 5 is started to pump out cooling liquid in a cooling liquid tank 6 and convey the cooling liquid to the interior of a heat exchange tube 7 in the transformer main body 2, when the cooling liquid passes through the interior of the heat exchange tube 7, the heat in transformer oil is absorbed, then the cooling liquid absorbing the heat flows into a cooling mechanism 8, the cooling mechanism 8 quickly radiates the heat carried by the cooling liquid to the outside, and then the cooling liquid returns to the interior of the cooling liquid tank 6, thereby form circulative cooling, thereby realized that the device possesses that heat dispersion is better, make transformer fluid remain static, it is safer, and practiced thrift the installation accessory, the installation operation is more convenient, excellent in protective effect, the advantage prior art of being convenient for maintain is relatively poor because the heat dispersion of fluid, and transformer oil can produce certain impact force to the inside component of transformer when flowing in inside, cause the component to damage in the past easily for a long time, the incident takes place, and need carry out a large amount of accessory equipment when the installation, the installation is very troublesome, the operation is inconvenient, protective properties is not good, the problem of not being convenient for maintain.

Please refer to fig. 1 and fig. 3, wherein: connecting assembly 4 includes two horizontal pull rods 41, vertical oblique pull rod 42 and adjusting part 43, and the one end of two horizontal pull rods 41 is respectively through bolt fixed connection to two connecting blocks 3 on, and the other end of two horizontal pull rods 41 all cooperates with adjusting part 43 is articulated, and the one end of vertical oblique pull rod 42 is articulated to adjusting part 43 on, and the other end of vertical oblique pull rod 42 passes through one side of bolt fixed connection to bottom plate 1.

According to the transformer body 2 fixing device, the horizontal pull rods 41, the vertical diagonal pull rods 42 and the adjusting assemblies 43 are used in a matched mode, the two horizontal pull rods 41 and the vertical diagonal pull rods 42 are matched with the adjusting assemblies 43 to form a triangular three-dimensional tensioning structure, so that the transformer body 2 is fixed more stably and firmly, in addition, during installation, only the connecting ends of the two horizontal pull rods 41 and the vertical diagonal pull rods 42 are required to be fixed with the connecting block 3 through bolts, then the transformer body 2 and the connecting assembly 4 are lifted to the installation position together, then the adjusting assemblies 43 are fixed with an external support, and the horizontal pull rods 41 and the vertical diagonal pull rods 42 are tightened through the adjusting assemblies 43, so that the device is connected more firmly, the operation is more convenient, and the accessory saving benefit is realized.

Please refer to fig. 3, in which: the adjusting assembly 43 comprises a hinge block 431, a mounting block 432, a connecting bolt 433 and an adjusting nut 434, wherein one side of the hinge block 431 is hinged with one ends of two horizontal pull rods 41 and a vertical diagonal pull rod 42, one side of the mounting block 432 is fixedly connected with one end of the connecting bolt 433, the other end of the connecting bolt 433 penetrates through and is screwed to one side of the hinge block 431 far away from the mounting block 432, the inner part of the adjusting nut 434 is screwed to the outer side of the connecting bolt 433, the adjusting nut 434 is positioned on one side of the hinge block 431 with the force of the mounting block 432, and the adjusting nut 434 is in close contact with one side of the hinge block 431 opposite to the hinge block 431.

In the invention, the installation block 432 and the external support are fixed by the cooperation of the hinge block 431, the installation block 432, the connecting bolt 433 and the adjusting nut 434, then the adjusting nut 434 is screwed, and the adjusting nut 434 pushes the hinge block 431 to approach the installation block 432 along the connecting bolt 433, so that the horizontal pull rod 41 and the vertical diagonal draw bar 42 are gradually tightened, a stable connection effect on the transformer main body 2 is formed, the installation operation of the device is convenient, and the connection is stable.

Please refer to fig. 1, in which: all fixedly connected with heating panel 9 around transformer main part 2, the inside of transformer main part 2 is injected with transformer oil.

In the invention, the heat dissipation can be synchronously performed by matching the periphery of the outer part of the transformer main body 2 with the cooling mechanism 8 at the bottom through the heat dissipation plate 9, the heat dissipation effect is improved, and the transformer oil is used for transferring heat to the heat exchange tube 7.

Please refer to fig. 2, in which: the heat exchange tube 7 has a square-shaped side view, and two arc-shaped ear tubes 71 are fixedly connected to the outer side of the heat exchange tube 7.

In the invention, the contact area between the heat exchange tube 7 and the transformer oil can be effectively increased by matching the zigzag heat exchange tube 7 with the two arc-shaped ear tubes 71, thereby increasing the heat transfer efficiency of the device and improving the heat dissipation effect.

Please refer to fig. 2 and fig. 4, wherein: cooling body 8 includes threaded cooling tube 81 and radiator fan 82, and logical groove 10 has been seted up to the inside of bottom plate 1, and radiator fan 82's outside fixed connection leads to the inside of groove 10, threaded cooling tube 81's bottom and radiator fan 82 fixed connection, threaded cooling tube 81's entry end and the bottom fixed connection of hot exchange pipe 7, threaded cooling tube 81's exit end and coolant liquid tank 6 fixed connection.

In the invention, by using the threaded radiating pipe 81 and the radiating fan 82 in a matching manner, when the cooling liquid absorbing heat flows into the threaded radiating pipe 81, the flow path is lengthened, the heat radiating time is prolonged, and the radiating fan 82 is started to accelerate the air flow, so that the rapid heat radiation is realized and the effect of circulating heat radiation is maintained.

Please refer to fig. 1 and fig. 2, wherein: emergency protection mechanism 11 includes two fixed blocks 111, two end brackets 112 and four buffering subassemblies 113, and two fixed blocks 111 relative one side respectively with the both ends fixed connection of end bracket 112, buffer slot 114 has been seted up at the top of end bracket 112, and four buffering subassemblies 113's bottom cooperatees with two buffer slot 114 respectively, and four buffering subassemblies 113 distribute in the four corners department of bottom plate 1 bottom respectively.

According to the invention, through the matching use of the two fixing blocks 111, the two bottom brackets 112 and the four buffer components 113, after the transformer main body 2 is installed, the fixing blocks 111 are also fixed under the external support, so that the bottom brackets 112 are matched with the four buffer components 113 to play a role in preventing falling and buffering the bottom plate 1, when the bottom plate 1 falls, the four buffer components 113 are pushed to be respectively compressed and horizontally move along the inner part of the buffer groove 114, the buffer protection on the bottom plate 1 and the transformer main body 2 is realized, the installation safety of the device is greatly improved, the connecting component 4 is also convenient to disassemble and maintain, the whole device is not required to be disassembled, and the maintenance difficulty and workload are reduced.

Please refer to fig. 1 and fig. 2, wherein: buffer component 113 includes connecting rod 1131, movable block 1132 and buffer spring 1133, and the top of connecting rod 1131 articulates the bottom to bottom plate 1, and the bottom of connecting rod 1131 articulates the top to movable block 1132, and the bottom sliding connection of movable block 1132 is to the inside of buffer slot 114, one side and buffer spring 1133 fixed connection of movable block 1132, the other end and the inner wall fixed connection of buffer slot 114 of buffer spring 1133.

In the invention, through the matching use of the connecting rod 1131, the movable block 1132 and the buffer spring 1133, when the bottom plate 1 moves downwards, the connecting rod 1131 pushes the movable block 1132 to slide towards the end part of the buffer groove 114 along the buffer groove, and the buffer spring 1133 is gradually squeezed in the sliding process of the movable block 1132, so that the reaction force generated by the buffer spring offsets the gravity of the falling bottom plate 1, thereby protecting the bottom plate.

The working principle is as follows: when the cooling device is used, the connecting ends of the two horizontal pull rods 41 and the vertical diagonal pull rods 42 are firstly fixed with the connecting block 3 through bolts, then the transformer main body 2 and the connecting component 4 are integrally lifted to the mounting position, then the adjusting component 43 is fixed with an external bracket, and the horizontal pull rods 41 and the vertical diagonal pull rods 42 are tightened through the adjusting component 43 so as to achieve the purpose of fastening, under the condition of ensuring stability, accessories are saved, so that the mounting operation is more convenient and faster, the water pump 5 is started to pump out the cooling liquid in the cooling liquid tank 6 and convey the cooling liquid into the heat exchange tubes 7 in the transformer main body 2, the cooling liquid absorbs the heat in the transformer oil when passing through the heat exchange tubes 7, when the cooling liquid absorbing the heat flows into the threaded radiating tubes 81, the flow path is lengthened, the heat radiating time is prolonged, and the air flows are accelerated by starting the radiating fan 82, the rapid heat dissipation is realized, and after the transformer main body 2 is installed, the fixing block 111 is also fixed under the external bracket, so that the bottom bracket 112 is matched with the four buffer components 113 to play a role in preventing falling and buffering the bottom plate 1, when the bottom plate 1 falls, the four buffer components 113 are pushed to be respectively compressed and horizontally move along the inner part of the buffer groove 114, the buffer protection on the bottom plate 1 and the transformer main body 2 is realized, the installation safety of the device is greatly improved, the connecting component 4 is also convenient to disassemble and maintain, the whole device is not required to be disassembled, the device has better heat dissipation performance, the transformer oil is kept static and safer, installation accessories are saved, the installation operation is more convenient, the protection effect is good, and the advantage of convenient maintenance solves the problem that the heat dissipation performance of the oil in the prior art is poor, and transformer oil can produce certain impact force to the inside component of transformer when flowing in inside, causes the component damage in the past easily for a long time, takes place the incident to need carry out a large amount of accessory equipment when the installation, the installation is very troublesome, and the operation is inconvenient, and barrier propterty is not good, the not easy to maintain's problem.

The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.

Claims

1. The utility model provides a safe radiating transformer, includes bottom plate (1), its characterized in that: the transformer comprises a bottom plate (1), a transformer main body (2) is fixedly connected to the top of the bottom plate (1), two connecting blocks (3) are fixedly connected to the left side and the right side of the transformer main body (2), two connecting assemblies (4) are arranged between the four connecting blocks (3) and the bottom plate (1), a water pump (5) and a cooling liquid tank (6) are fixedly connected to the top of the bottom plate (1), the water pump (5) and the cooling liquid tank (6) are located on the front side of the transformer main body (2), the input end of the water pump (5) is fixedly connected with the cooling liquid tank (6) through a pipeline, the output end of the water pump (5) penetrates through the pipeline and is fixedly connected to the inside of the transformer main body (2), a heat exchange pipe (7) is fixedly connected to the inside of the transformer main body (2), and the output end of the water pump (5) is communicated with the inlet end of the heat exchange pipe (7) through a pipeline, the bottom of hot exchange pipe (7) runs through and fixed connection to the bottom of transformer main part (2), the bottom of transformer main part (2) is provided with cooling body (8), the entry end of cooling body (8) and the bottom fixed connection of hot exchange pipe (7), the exit end of cooling body (8) is linked together through the inside of pipeline with coolant liquid case (6), the bottom of bottom plate (1) is provided with emergency protection mechanism (11).

2. A transformer for safe heat dissipation according to claim 1, wherein: coupling assembling (4) include two horizontal pull rod (41), vertical oblique pull rod (42) and adjusting part (43), two the one end of horizontal pull rod (41) is respectively through bolt fixed connection to two connecting blocks (3) on, two the other end of horizontal pull rod (41) all cooperates with adjusting part (43) are articulated, the one end of vertical oblique pull rod (42) is articulated to adjusting part (43) on, the other end of vertical oblique pull rod (42) passes through one side of bolt fixed connection to bottom plate (1).

3. A transformer for safe heat dissipation according to claim 2, wherein: adjusting part (43) is including articulated piece (431), installation piece (432), connecting bolt (433) and adjusting nut (434), one side of articulated piece (431) is articulated with the one end of two horizontal pull rods (41) and vertical diagonal draw bar (42), one side of installation piece (432) and the one end fixed connection of connecting bolt (433), the other end of connecting bolt (433) runs through and threaded connection to articulated piece (431) keeps away from one side of installation piece (432), the inside threaded connection of adjusting nut (434) is to the outside of connecting bolt (433), adjusting nut (434) are located articulated one side of piece (431) fortune power installation piece (432), one side in close contact with that adjusting nut (434) and articulated piece (431) are relative.

4. A transformer for safe heat dissipation according to claim 1, wherein: all fixedly connected with heating panel (9) around transformer main part (2), the inside injection of transformer main part (2) has transformer oil.

5. A transformer for safe heat dissipation according to claim 1, wherein: the side-view cross section of the heat exchange pipe (7) is in a shape like a Chinese character 'hui', and two arc-shaped ear pipes (71) are fixedly connected to the outer side of the heat exchange pipe (7).

6. A transformer for safe heat dissipation according to claim 1, wherein: cooling body (8) are including screw thread cooling tube (81) and radiator fan (82), logical groove (10) have been seted up to the inside of bottom plate (1), the outside fixed connection of radiator fan (82) leads to the inside of groove (10), the bottom and radiator fan (82) fixed connection of screw thread cooling tube (81), the entry end of screw thread cooling tube (81) and the bottom fixed connection of hot exchange pipe (7), the exit end and coolant liquid case (6) fixed connection of screw thread cooling tube (81).

7. A transformer for safe heat dissipation according to claim 1, wherein: urgent protection machanism (11) include two fixed blocks (111), two end bracket (112) and four buffering subassemblies (113), two one side that fixed block (111) is relative respectively with the both ends fixed connection of end bracket (112), buffer slot (114), four have been seted up at the top of end bracket (112) the bottom of buffering subassembly (113) cooperatees with two buffer slot (114) respectively, four buffering subassembly (113) distribute respectively in the four corners department of bottom plate (1) bottom.

8. A transformer for safe heat dissipation according to claim 7, wherein: buffer assembly (113) includes connecting rod (1131), movable block (1132) and buffer spring (1133), the top of connecting rod (1131) articulates the bottom to bottom plate (1), the bottom of connecting rod (1131) articulates the top to movable block (1132), the bottom sliding connection of movable block (1132) is to the inside of buffer slot (114), one side and buffer spring (1133) fixed connection of movable block (1132), the other end and the inner wall fixed connection of buffer slot (114) of buffer spring (1133).