Auxiliary device for disassembling and assembling power unit of frequency converter

Abstract

The utility model discloses an auxiliary device for disassembling and assembling a power unit of a frequency converter, which belongs to the technical field of disassembling and assembling a power unit of a frequency converter, and solves the problem of low efficiency in the disassembling process of the existing frequency converter. The auxiliary device comprises an L-shaped vertical bracket, the vertical part of the L-shaped vertical bracket is slidably mounted with an inverted U-shaped inner frame, a base is provided above the horizontal part of the L-shaped vertical bracket, one end of the base is connected to the inverted U-shaped inner frame through a baffle, a hydraulic cylinder is provided on the L-shaped vertical bracket, a telescopic shaft is provided at the top end of the hydraulic cylinder, the telescopic shaft is connected to the inner wall of the upper part of the inverted U-shaped inner frame, and a fixing plate is provided behind the L-shaped vertical bracket. The utility model is an auxiliary device for disassembling and assembling a power unit of a frequency converter, so that the power unit of the frequency converter can be directly placed after being disassembled, thereby improving the efficiency of disassembly and assembly, and has the characteristics of being easy to use and highly practical.

Description

Technical Field

[0001] The utility model relates to the technical field of disassembly and assembly of a frequency converter power unit, in particular to an auxiliary device for disassembly and assembly of a frequency converter power unit. Background Art

[0002] Since the 165MW generator system of the Energy Center was put into operation throughout the year, manual handling has been used to dismantle and assemble the inverter power unit every time the inverter is overhauled. The inverter power unit is large and bulky, and multiple employees are required to cooperate with each other during disassembly and assembly. Whenever the 165MW generator is stopped for maintenance, the supporting power unit needs to be disassembled and cleaned simultaneously, and the fasteners need to be checked for related maintenance work. There are a large number of inverter power units for the induced draft fan, condensate pump, and feed water pump, which consumes a lot of labor during maintenance. The existing hand-pushed hydraulic forklift is used for transportation, and the hollow forklift structure cannot adapt to the structure of the inverter power unit, which makes the manual operation period longer, and it is difficult to complete all dismantling and maintenance work during a short downtime. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an auxiliary device for disassembling and assembling a power unit of a frequency converter in view of the above-mentioned deficiencies in the prior art, so that the power unit of the frequency converter can be directly placed after being disassembled, thereby improving the disassembly and assembly efficiency, and having the characteristics of being easy to use and highly practical.

[0004] The technical solution adopted by the utility model is: an auxiliary device for disassembling and assembling a power unit of a frequency converter, comprising an L-shaped vertical bracket, a vertical part of the L-shaped vertical bracket being slidably mounted with an inverted U-shaped inner frame, a base being arranged above the horizontal part of the L-shaped vertical bracket, one end of the base being connected to the inverted U-shaped inner frame through a baffle, a hydraulic cylinder being arranged on the L-shaped vertical bracket, a telescopic shaft being arranged at the top end of the hydraulic cylinder, the telescopic shaft being connected to the inner wall of the upper part of the inverted U-shaped inner frame, a fixed plate being arranged at the back of the L-shaped vertical bracket, two buffer mechanisms for slowing down the falling speed of the inverted U-shaped inner frame being arranged between the fixed plate and the inverted U-shaped inner frame, and a pushing device for pushing the inverted U-shaped inner frame being arranged at the lower end at the back of the L-shaped vertical bracket.

[0005] As a further improvement, the buffer mechanism includes a chain and a sprocket, the sprocket is rotatably installed on the top of the inverted U-shaped inner frame, the chain is meshingly connected to the sprocket, one end of the chain is connected to the fixed plate, and the other end of the chain is slidably connected to the inner wall of the inverted U-shaped inner frame through a buffer spring.

[0006] Furthermore, an intermediate clamping block is provided between the hydraulic cylinder and the fixed plate, a threaded plug shaft is provided at one end of the chain, and the threaded plug shaft is threadedly connected to the intermediate clamping block.

[0007] Furthermore, a slide groove is provided on the inner wall of the inverted U-shaped inner frame, and the buffer spring is installed in the slide groove.

[0008] Furthermore, the pushing device includes a push rod, a fixed block and a return spring. The bottom of the hydraulic cylinder is fixedly sleeved with a fixed block, the surface of the fixed block is fixedly installed with a return spring, the lower end of the push rod is rotatably connected to the outer surface of the hydraulic cylinder, the upper end of the return spring is fixedly connected to the bottom of the push rod, and a foot pedal is also provided on one side of the push rod.

[0009] Furthermore, two vertically arranged mounting rings are fixedly mounted on the hydraulic cylinder, the lower end of the push rod is rotatably connected to the lower mounting ring, the upper mounting ring is slidably connected to a limit shaft, and the other end of the limit shaft is rotatably connected to the push rod.

[0010] Furthermore, a U-shaped shaft is sleeved on the surface of the hydraulic cylinder, and the U-shaped shaft is connected to the fixing plate after clamping the hydraulic cylinder.

[0011] Furthermore, universal wheels are symmetrically rotatably installed on both sides of the back side of the L-shaped vertical bracket, and handrails are symmetrically connected to both sides of the back side of the L-shaped vertical bracket.

[0012] Beneficial Effects

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] The utility model discloses an auxiliary device for disassembling and assembling a frequency converter power unit. When in use, the auxiliary device can be conveniently moved to the side of the frequency converter by means of a handrail and a push rod through a universal wheel. The hydraulic cylinder enables the telescopic shaft to push the inverted U-shaped inner frame upwards through the driving end. The inverted U-shaped inner frame drives the baffle plate and the base to be lifted upwards synchronously, and the height position of the base is lifted to a position corresponding to the frequency converter power unit, which is convenient for operators. The frequency converter power unit can be directly received by the base when it is pulled out of the chassis, and then the disassembly and assembly can be carried out very conveniently. After the disassembly and assembly is completed, it can be directly transported to the designated position through the auxiliary device, which effectively improves the disassembly and assembly efficiency. During use, if the telescopic shaft suddenly fails relative to the hydraulic cylinder, the buffer spring can effectively play a pulling and buffering role, effectively protecting the frequency converter power unit. The utility model has the characteristics of strong practicality and wide application range. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0016] Figure 2 It is a rear view structural schematic diagram of the utility model;

[0017] Figure 3It is an enlarged schematic diagram of the structure of the pushing device in the utility model.

[0018] Among them: 1-L-shaped vertical bracket, 2-inverted U-shaped inner frame, 3-baffle, 4-base, 5-limiting shaft, 6-handrail, 7-hydraulic cylinder, 8-chain, 9-sprocket, 10-telescopic shaft, 11-U-shaped shaft, 12-middle clamping block, 13-universal wheel, 14-threaded plug shaft, 15-fixed plate, 16-fixed block, 17-push rod, 18-foot pedal, 19-reset spring, 20-buffer spring, 21-mounting ring. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0020] See also Figure 1-3 As shown, the utility model is an auxiliary device for disassembling and assembling a power unit of a frequency converter, comprising an L-shaped vertical bracket 1, a vertical portion of the L-shaped vertical bracket 1 being slidably mounted with an inverted U-shaped inner frame 2, a base 4 being arranged above the horizontal portion of the L-shaped vertical bracket 1, one end of the base 4 being connected to the inverted U-shaped inner frame 2 through a baffle 3, a hydraulic cylinder 7 being arranged on the L-shaped vertical bracket 1, a telescopic shaft 10 being arranged at the top end of the hydraulic cylinder 7, the telescopic shaft 10 being connected to the inner wall of the upper portion of the inverted U-shaped inner frame, a fixing plate 15 being arranged at the back of the L-shaped vertical bracket 1, two buffer mechanisms for slowing down the falling speed of the inverted U-shaped inner frame 2 being arranged between the fixing plate 15 and the inverted U-shaped inner frame 2, a pushing device for pushing the inverted U-shaped inner frame 2 being arranged at the lower end of the back of the L-shaped vertical bracket 1, and when in use, the inverted U-shaped inner frame 2 is pushed by the handrail 6 and the push rod 17 through the The wheel 13 can be easily moved to the side of the inverter. The hydraulic cylinder 7 enables the telescopic shaft 10 to push the inverted U-shaped inner frame 2 upward through the driving end. The inverted U-shaped inner frame 2 drives the baffle 3 and the base 4 to be lifted upward synchronously, and the height position of the base 4 is lifted to a position corresponding to the inverter power unit, so that the operator can easily pull the inverter power unit out of the chassis and it can be directly received by the base 4, and then the disassembly and assembly effect can be very convenient. After the disassembly and assembly is completed, it can be directly transported to the designated position through the auxiliary device, which effectively improves the disassembly and assembly efficiency. During use, if the telescopic shaft 10 suddenly fails relative to the hydraulic cylinder 7, the buffer spring 20 can effectively play a pulling and buffering role, effectively protecting the inverter power unit.

[0021] Specifically, the buffer mechanism includes a chain 8 and a sprocket 9. The sprocket 9 is rotatably installed on the top of the inverted U-shaped inner frame 2. The chain 8 is meshed with the sprocket 9. One end of the chain 8 is connected to the fixed plate 15. The other end of the chain 8 is slidably connected to the inner wall of the inverted U-shaped inner frame 2 through a buffer spring 20. During use, if the telescopic shaft 10 suddenly fails relative to the hydraulic cylinder 7, the buffer spring 20 can effectively play a pulling and buffering role, thereby effectively protecting the inverter power unit.

[0022] Preferably, an intermediate clamp block 12 is provided between the hydraulic cylinder 7 and the fixed plate 15, and a threaded shaft 14 is provided at one end of the chain 8. The threaded shaft 14 is threadedly connected to the intermediate clamp block 12. The intermediate clamp block 12 fixes the hydraulic cylinder 7, making it more stable during use.

[0023] Furthermore, a slide groove is provided on the inner wall of the inverted U-shaped inner frame 2, and the buffer spring 20 is installed in the slide groove. The slide groove plays a guiding role, so that the buffer spring 20 can slide up and down more smoothly.

[0024] Furthermore, the pushing device includes a push rod 17, a fixed block 16 and a return spring 19. The bottom of the hydraulic cylinder 7 is fixedly sleeved with the fixed block 16, and the return spring 19 is fixedly installed on the surface of the fixed block 16. The lower end of the push rod 17 is rotatably connected to the outer surface of the hydraulic cylinder 7, and the upper end of the return spring 19 is fixedly connected to the bottom of the push rod 17. A foot pedal 18 is also provided on one side of the push rod 17. When the auxiliary device needs to be moved, the push rod 17 can be rotated to a suitable position for pushing and pulling. After releasing, it can be reset automatically under the action of the return spring 19. The foot pedal 18 is conducive to the user to push and pull with greater force, so that the push rod 17 can be rotated downward, and the user can pick it up without bending over.

[0025] Furthermore, two mounting rings 21 arranged up and down are fixedly mounted on the hydraulic cylinder 7, the lower end of the push rod 17 is rotatably connected to the lower mounting ring 21, and the upper mounting ring is slidably connected to a limit shaft 5, and the other end of the limit shaft 5 is rotatably connected to the push rod 17, so that the push rod 17 is installed more stably, and the limit shaft 5 plays a guiding role.

[0026] Furthermore, a U-shaped shaft 11 is sleeved on the surface of the hydraulic cylinder. The U-shaped shaft 11 clamps the hydraulic cylinder 7 and is connected to the fixing plate 15 to fix the hydraulic cylinder 7, so that the operation process is more stable.

[0027] Furthermore, universal wheels 13 are symmetrically rotatably mounted on both sides of the back of the L-shaped vertical bracket 1 , and handrails 6 are symmetrically connected to both sides of the back of the L-shaped vertical bracket 1 , so as to facilitate the operator to move the auxiliary device.

[0028] When the auxiliary device for disassembling and assembling the power unit of the frequency converter of the present embodiment is used, the handrail 6 and the push rod 17 can be conveniently moved to the side of the frequency converter through the universal wheel 13, and the hydraulic cylinder 7 drives the telescopic shaft 10 to push the inverted U-shaped inner frame 2 upward through the driving end, and the inverted U-shaped inner frame 2 drives the baffle 3 and the base 4 to be lifted upward synchronously, and the height position of the base 4 is lifted to the position corresponding to the frequency converter power unit, so that the operator can conveniently pull the frequency converter power unit out of the chassis and it can be directly received by the base 4, and then the disassembly and assembly effect can be very convenient. After the disassembly and assembly is completed, it can be directly transported to the designated position through the auxiliary device, effectively improving the disassembly and assembly efficiency. During use, if the telescopic shaft 10 suddenly fails relative to the hydraulic cylinder 7, the buffer spring 20 can effectively play the role of pulling and buffering, and effectively protect the frequency converter power unit. The auxiliary device for disassembling and assembling the power unit of the frequency converter of the present utility model enables the frequency converter power unit to be directly placed after being disassembled, improves the disassembly and assembly efficiency, and has the characteristics of convenient use and strong practicality.

[0029] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. An auxiliary device for disassembling and assembling a power unit of a frequency converter, characterized in that: The invention comprises an L-shaped vertical bracket (1), wherein the vertical part of the L-shaped vertical bracket (1) is slidably mounted with an inverted U-shaped inner frame (2), a base (4) is arranged above the horizontal part of the L-shaped vertical bracket (1), one end of the base (4) is connected to the inverted U-shaped inner frame (2) through a baffle (3), a hydraulic cylinder (7) is arranged on the L-shaped vertical bracket (1), a telescopic shaft (10) is arranged at the top end of the hydraulic cylinder (7), and the telescopic shaft (10) is connected to the inner wall of the upper part of the inverted U-shaped inner frame, a fixing plate (15) is arranged at the back of the L-shaped vertical bracket (1), and two buffer mechanisms for slowing down the falling speed of the inverted U-shaped inner frame (2) are arranged between the fixing plate (15) and the inverted U-shaped inner frame (2), and a pushing device for pushing the inverted U-shaped inner frame is arranged at the lower end of the back of the L-shaped vertical bracket (1).

2. The auxiliary device for disassembling and assembling a frequency converter power unit according to claim 1, characterized in that: The buffer mechanism comprises a chain (8) and a sprocket (9), wherein the sprocket (9) is rotatably mounted on the top of the inverted U-shaped inner frame (2), the chain (8) is meshedly connected with the sprocket (9), one end of the chain (8) is connected to a fixed plate (15), and the other end of the chain (8) is slidably connected to the inner wall of the inverted U-shaped inner frame (2) via a buffer spring (20).

3. The auxiliary device for disassembling and assembling a frequency converter power unit according to claim 2, characterized in that: An intermediate clamping block (12) is provided between the hydraulic cylinder (7) and the fixed plate (15), and a threaded inserting shaft (14) is provided at one end of the chain (8), and the threaded inserting shaft (14) is threadedly connected to the intermediate clamping block (12).

4. The auxiliary device for disassembling and assembling a frequency converter power unit according to claim 2, characterized in that: The inner wall of the inverted U-shaped inner frame (2) is provided with a slide groove, and the buffer spring (20) is installed in the slide groove.

5. The auxiliary device for disassembling and assembling a frequency converter power unit according to claim 1, characterized in that: The pushing device comprises a push rod (17), a fixed block (16) and a return spring (19); the bottom of the hydraulic cylinder (7) is fixedly sleeved with the fixed block (16); the surface of the fixed block (16) is fixedly mounted with the return spring (19); the lower end of the push rod (17) is rotatably connected to the outer surface of the hydraulic cylinder (7); the upper end of the return spring (19) is fixedly connected to the bottom of the push rod (17); and a foot pedal (18) is also provided on one side of the push rod (17).

6. The auxiliary device for disassembling and assembling a frequency converter power unit according to claim 5, characterized in that: The hydraulic cylinder (7) is fixedly mounted with two mounting rings (21) arranged up and down, the lower end of the push rod (17) is rotatably connected to the lower mounting ring (21), the upper mounting ring is slidably connected to a limit shaft (5), and the other end of the limit shaft (5) is rotatably connected to the push rod (17).

7. The auxiliary device for disassembling and assembling a frequency converter power unit according to claim 1, characterized in that: A U-shaped shaft (11) is sleeved on the surface of the hydraulic cylinder, and the U-shaped shaft (11) is connected to the fixing plate (15) after clamping the hydraulic cylinder (7).

8. The auxiliary device for disassembling and assembling a frequency converter power unit according to claim 1, characterized in that: Universal wheels (13) are symmetrically rotatably mounted on both sides of the back of the L-shaped vertical bracket (1), and handrails (6) are symmetrically connected to both sides of the back of the L-shaped vertical bracket (1).

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