Distribution Transformer Hydraulic Lifting Device and Distribution Transformer Lifting Method

Abstract

The present invention belongs to the technical field of transformer construction equipment, and specifically relates to a hydraulic lifting device for a distribution transformer and a method for lifting a distribution transformer; the hydraulic lifting device for a distribution transformer includes a hydraulic support column, and the hydraulic support column is connected to a pole through a lower end locking hoop and an upper end locking hoop. The lower end locking hoop includes a hinge type variable diameter locking hoop and a supporting hinge seat, and the upper end locking hoop includes a hinge type variable diameter locking hoop and a double semi-circular clamping device; the hinge type variable diameter locking hoop includes two hinge type semi-rings, and the hinge type semi-ring includes a first arc connecting block and a second arc connecting block; the supporting hinge seat includes a hinge seat plate, and a pin slot and an elastic clamping block are arranged on the hinge seat plate; the double semi-circular clamping device includes an oil cylinder buckle base, an oil cylinder buckle pressing cover and a locking claw; the method for lifting a distribution transformer according to the present invention utilizes the above-mentioned hydraulic lifting device for a distribution transformer, can adapt to various external environments, and can safely and efficiently complete the work of adjusting the height of the platform frame.

Description

Technical Field

[0001] The present invention belongs to the technical field of transformer construction equipment, and particularly relates to a hydraulic lifting device for a distribution transformer and a method for lifting a distribution transformer. Background Art

[0002] In order to comprehensively improve the quality of residential electricity consumption and rationally distribute the load of distribution transformers, it is necessary to complete the construction of new distribution transformer substations and the replacement of JP cabinets in many regions, especially in urban and rural areas. Due to the different construction years of the transformers to be renovated and the inconsistent construction processes required by different regulations, if the platform is too low during the renovation, the distance from the bottom of the JP cabinet to the ground is insufficient, posing a great potential safety hazard to passing pedestrians. If the platform is too high, the height of the JP cabinet from the ground is too high, making the operation extremely inconvenient. To ensure that the heights of the transformer body and the JP cabinet from the ground meet the requirements, when adding a new JP cabinet to the transformer, it is necessary to raise or lower the height of the platform. In the current construction process, the adjustment of the height of the transformer platform must be completed with the help of a crane. However, most distribution transformers are restricted by roads and surrounding obstacles, and only chain blocks or hand-operated hoists can be selected to complete the height adjustment of the transformer. There are problems such as high crane rental costs and great influence from the terrain and environment in the above work. The whole process is cumbersome and costly, consuming a great deal of manpower, material resources and financial resources. If the roads around the substation area are narrow and there are many obstacles such as trees, the safety distance cannot be guaranteed during operation under live lines, resulting in the inability to complete some substations on time, and even the need to change or cancel projects, seriously restricting the smooth progress of the construction of the distribution network project. Therefore, it is very necessary to provide a hydraulic lifting device for a distribution transformer and a method for lifting a distribution transformer that are not affected by the environment, can safely and efficiently complete the work of adjusting the height of the platform, and can also reduce costs and save time. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art, and to provide a distribution transformer hydraulic lifting device and a method for lifting a distribution transformer with reasonable structure, convenient operation and use, capable of adapting to various external environments, safely and efficiently completing the work of adjusting the height of the platform, and reducing costs and saving time.

[0004] The purpose of the present invention is achieved as follows: A hydraulic lifting device for a distribution transformer includes a hydraulic support column. The hydraulic support column includes a cylinder body and a piston. The bottom of the cylinder body is connected with a bearing plate. A bearing axle pin is arranged on the bearing plate. The top of the piston is connected with a flange plate. The flange plate is connected with a boosting cross beam. An anti-falling hook is arranged on the boosting cross beam. The bottom of the hydraulic support column is connected with a pole through a lower end locking hoop. The upper part of the hydraulic support column is connected with the pole through an upper end locking hoop. The lower end locking hoop includes a hinge type variable diameter locking hoop and a supporting hinge seat. The upper end locking hoop includes a hinge type variable diameter locking hoop and a double semi-circular clamping device.

[0005] The hinge - type variable - diameter locking hoop comprises two hinge - type semi - rings. The hinge - type semi - ring comprises a first arc connecting block and two second arc connecting blocks. Both ends of the first arc connecting block are rotatably connected to the second arc connecting blocks through connecting pin shafts. Both ends of the left - hand hinge - type semi - ring are rotatably connected with rotating shaft nuts. The upper end of the right - hand hinge - type semi - ring is rotatably connected with a rotating shaft nut, and the lower end is fixedly connected with an opening baffle. The upper parts of the left - and right - hand hinge - type semi - rings are connected by variable - diameter adjusting bolts, and the lower parts of the left - and right - hand hinge - type semi - rings are connected by tension bolts. Both ends of the variable - diameter adjusting bolt are respectively threadedly connected with the rotating shaft nuts on its two sides. The tension bolt is threadedly connected with the rotating shaft nut on its left side, and a tension nut is arranged on the tension bolt.

[0006] The supporting hinge seat comprises a hinge seat plate. An axle - pin slot adapted to the bearing axle pin is arranged on the hinge seat plate. An elastic clamping block is slidably connected to the right end of the hinge seat plate. A locking spring is connected between the elastic clamping block and the hinge seat plate. The right end of the elastic clamping block is connected with a clamping - block pull handle. The supporting hinge seat is fixedly connected to the right end of the hinge - type variable - diameter locking hoop through the hinge seat plate to form the lower - end locking hoop.

[0007] The double - semi - circle clamping device comprises an oil - cylinder clamping base. The oil - cylinder clamping base is rotatably connected with an oil - cylinder clamping cover through a hinge. Semi - circular grooves for clamping the hydraulic support column are arranged on both the oil - cylinder clamping base and the oil - cylinder clamping cover. The upper end of the oil - cylinder clamping cover is rotatably connected with a locking claw. The right end of the locking claw is connected with the oil - cylinder clamping cover through a return spring. A long circular hole is arranged on the oil - cylinder clamping base. The double - semi - circle clamping device is connected to the hinge - type variable - diameter locking hoop through the long circular hole and bolts on it to form the upper - end locking hoop.

[0008] The boosting cross - beam is an I - shaped steel or an H - shaped steel. The anti - falling hooks are arranged at both ends of the boosting cross - beam. One end of the anti - falling hook is rotatably connected to the boosting cross - beam, and the middle part of the anti - falling hook is connected to the boosting cross - beam through an anti - falling spring.

[0009] An intermediate adjusting nut is arranged in the middle of the variable - diameter adjusting bolt, and the thread directions on both sides of the variable - diameter adjusting bolt are opposite.

[0010] One end of the opening baffle is an inclined plate that can prevent the tension nut from sliding out.

[0011] The elastic clamping block comprises a sliding clamping block. The left end face of the sliding clamping block is an inclined plane. A T - shaped guiding boss is arranged on the sliding clamping block. The right end of the sliding clamping block is connected with a pulling plate.

[0012] The method for lifting a distribution transformer uses the described distribution - transformer hydraulic lifting device and comprises the following steps:

[0013] Step 1: Connect the booster crossbeam to the flange at the top end of the piston, lift it to the bottom of the crossarm of the transformer, and hook the anti-falling hook on the crossarm; fix the upper locking hoop and the lower locking hoop on the corresponding utility poles at a predetermined height respectively. The upper end of the hydraulic support is embedded in the semi-circular groove of the oil cylinder buckle base, close the oil cylinder buckle cover and fasten the locking claw.

[0014] Step 2: Place the bearing pin at the bottom of the hydraulic support into the pin slot of the lower locking hoop, and the elastic clamping block will automatically lock. Adjust the relative positions and angles between the lower locking hoop, the upper locking hoop, the hydraulic support and the utility pole to make the hydraulic support vertical, and tighten the tension nut and the oil cylinder compression screw.

[0015] Step 3: Connect the hydraulic support to related equipment such as hydraulic oil pipes, control lines, and hydraulic pump stations. Start the pump station and the synchronous jog control button, and the two hydraulic supports will rise synchronously. When the booster crossbeam is in full contact with the crossarm, loosen the fastening bolts of the crossarm until it can slide slightly.

[0016] Step 4: Synchronously press the control button to make the hydraulic support push the transformer to rise at a uniform speed. When the transformer rises to the specified position, release the button, and the oil circuit of the pump station will be self-locked. Tighten the bolts of the crossarm, and the transformer lifting work is completed.

[0017] Step 5: Loosen the anti-falling hook on the booster crossbeam, lower the hydraulic support to the initial state, open the oil cylinder buckle cover and the elastic clamping block, remove the hydraulic support, loosen the tension bolts, remove the lower locking hoop and the upper locking hoop, recycle the tool equipment, and clean the site.

[0018] Advantages of the present invention: The hydraulic lifting device for distribution transformers of the present invention can lift the distribution transformer and the JP cabinet to the specified height by means of the synchronous hydraulic propulsion of the bilateral hydraulic struts; the upper locking hoop and the lower locking hoop are mainly hinge-type variable-diameter locking hoops, and are fixed on the pole by utilizing the "taper" characteristic of the non-uniform diameter pole. The bearing pin at the lower end of the hydraulic strut is clamped into the pin slot of the hinge-type variable-diameter locking hoop, and is limited by the elastic block to ensure that it will not fall off; the cylinder block at the upper end of the hydraulic strut is clamped into the grooves of the oil cylinder buckle base and the oil cylinder buckle gland, and is locked by the locking claw to ensure its stability; the hinge-type variable-diameter locking hoop is formed by rotatably connecting two hinge-type semi-rings through a rotating shaft nut, a variable-diameter adjusting bolt and a tensioning bolt. Among them, the hinge-type semi-ring is formed by rotatably connecting a first arc connecting block with two second arc connecting blocks through a connecting pin. Through the cooperation of the variable-diameter adjusting bolt and the tensioning bolt, the first arc connecting block and the second arc connecting block can be tightened inward with all-round pressure, effectively overcoming the defect that the traditional hoop can only be locally tightened; after the two sides of the hydraulic struts are fixed, the pistons can be synchronously pushed upward, and the cross arm can be pushed upward through the boosting cross beam at the top until the transformer reaches the designated position; the hydraulic lifting device for distribution transformers of the present invention has a reasonable structure and is convenient to operate and use. The method for lifting the distribution transformer of the present invention utilizes the above-mentioned hydraulic lifting device for distribution transformers, can adapt to various external environments, can safely and efficiently complete the work of adjusting the height of the platform frame, effectively improves the work efficiency, and reduces the labor cost and labor intensity. Description of the Drawings

[0019] Figure 1 It is a schematic diagram of the overall structure of the hydraulic lifting device for distribution transformers of the present invention.

[0020] Figure 2 It is a front view structural schematic diagram of the connection between the hydraulic strut and the boosting cross beam of the hydraulic lifting device for distribution transformers of the present invention.

[0021] Figure 3 It is a left view structural schematic diagram of the connection between the hydraulic strut and the boosting cross beam of the hydraulic lifting device for distribution transformers of the present invention.

[0022] Figure 4 It is a front view structural schematic diagram of the lower locking hoop of the hydraulic lifting device for distribution transformers of the present invention.

[0023] Figure 5 It is a top view structural schematic diagram of the lower locking hoop of the hydraulic lifting device for distribution transformers of the present invention.

[0024] Figure 6 It is a front view structural schematic diagram of the upper locking hoop of the hydraulic lifting device for distribution transformers of the present invention.

[0025] Figure 7This is a top view structural schematic diagram of the upper locking hoop of the hydraulic lifting device for the distribution transformer of the present invention.

[0026] Figure 8 This is a front view structural schematic diagram of the elastic clamping block of the hydraulic lifting device for the distribution transformer of the present invention.

[0027] Figure 9 This is a left view structural schematic diagram of the elastic clamping block of the hydraulic lifting device for the distribution transformer of the present invention.

[0028] In the figure: 1. Lower locking hoop; 2. Hydraulic support pillar; 3. Upper locking hoop; 4. Cross arm; 5. Boosting cross beam; 6. Utility pole; 7. Transformer; 8. Bearing pin; 9. Bearing plate; 10. Cylinder block; 11. Piston; 12. Flange; 13. Anti-falling hook; 14. Anti-falling spring; 15. Second arc connecting block; 16. Hinge type semi-ring; 17. First arc connecting block; 18. Connecting pin; 19. Variable diameter adjusting bolt; 20. Intermediate adjusting nut; 21. Rotating shaft nut; 22. Hinge type variable diameter locking hoop; 23. Support hinge seat; 24. Clamping block handle; 25. Elastic clamping block; 26. Pin slot; 27. Hinge seat plate; 28. Tightening nut; 29. Open baffle; 30. Tightening bolt; 31. Locking spring; 32. Oil cylinder buckle base; 33. Locking claw; 34. Return spring; 35. Oil cylinder pressing screw; 36. Double semi-circular clamping device; 37. Oil cylinder buckle cover; 38. Hinge; 39. Long circular hole; 40. Sliding clamping block; 41. Guide boss; 42. Pulling plate. Detailed implementation manners

[0029] The present invention will be further described below with reference to the accompanying drawings.

[0030] Embodiment 1

[0031] As Figures 1-7 shown, the hydraulic lifting device for the distribution transformer includes a hydraulic support pillar 2. The hydraulic support pillar 2 includes a cylinder block 10 and a piston 11. The bottom of the cylinder block 10 is connected with a bearing plate 9. A bearing pin 8 is arranged on the bearing plate 9. The top of the piston 11 is connected with a flange 12. The flange 12 is connected with a boosting cross beam 5. An anti-falling hook 13 is arranged on the boosting cross beam 5. The bottom of the hydraulic support pillar 2 is connected with the utility pole 6 through a lower locking hoop 1. The upper part of the hydraulic support pillar 2 is connected with the utility pole 6 through an upper locking hoop 3. The lower locking hoop 1 includes a hinge type variable diameter locking hoop 22 and a support hinge seat 23. The upper locking hoop 3 includes a hinge type variable diameter locking hoop 22 and a double semi-circular clamping device 36.

[0032] The hinge - type variable - diameter locking hoop 22 includes two hinge - type half - rings 16. The hinge - type half - ring 16 includes a first arc - shaped connecting block 17 and two second arc - shaped connecting blocks 15. Both ends of the first arc - shaped connecting block 17 are rotationally connected to the second arc - shaped connecting block 15 through connecting pin shafts 18; both ends of the left - hand hinge - type half - ring 16 are rotationally connected to a rotating shaft nut 21, the upper end of the right - hand hinge - type half - ring 16 is rotationally connected to a rotating shaft nut 21, and the lower end is fixedly connected to an opening baffle 29; the upper parts of the left - and right - hand hinge - type half - rings 16 are connected by variable - diameter adjustment bolts 19, and the lower parts of the left - and right - hand hinge - type half - rings 16 are connected by tension bolts 30. Both ends of the variable - diameter adjustment bolt 19 are threadedly connected to the rotating shaft nuts 21 on its two sides respectively. The tension bolt 30 is threadedly connected to the rotating shaft nut 21 on its left side, and a tension nut 28 is arranged on the tension bolt 30.

[0033] The support hinge base 23 includes a hinge base plate 27. An axle - pin slot 26 adapted to the load - bearing axle pin 8 is arranged on the hinge base plate 27. An elastic clamping block 25 is slidably connected to the right end of the hinge base plate 27. A locking spring 31 is connected between the elastic clamping block 25 and the hinge base plate 27. A clamping - block pull - handle 24 is connected to the right end of the elastic clamping block 25; the support hinge base 23 is fixedly connected to the right end of the hinge - type variable - diameter locking hoop 22 through the hinge base plate 27 to form the lower - end locking hoop 1.

[0034] The double - semi - circle clamping device 36 includes an oil - cylinder clamping base 32. The oil - cylinder clamping base 32 is rotationally connected to an oil - cylinder clamping cover 37 through a hinge 38. Semi - circular grooves for clamping the hydraulic support 2 are arranged on both the oil - cylinder clamping base 32 and the oil - cylinder clamping cover 37. A locking claw 33 is rotationally connected to the upper end of the oil - cylinder clamping cover 37. The right end of the locking claw 33 is connected to the oil - cylinder clamping cover 37 through a return spring 34. A long - round hole 39 is arranged on the oil - cylinder clamping base 32; the double - semi - circle clamping device 36 is connected to the hinge - type variable - diameter locking hoop 22 through the long - round hole 39 and bolts on it to form the upper - end locking hoop 3.

[0035] The method for lifting a distribution transformer uses the described hydraulic lifting device for the distribution transformer and includes the following steps:

[0036] Step 1: Connect the boosting cross - beam 5 to the flange plate 12 at the top end of the piston 11, lift it to the bottom of the cross - arm 4 of the transformer 7, and hook the anti - falling hook 13 on the cross - arm 4; fix the upper - end locking hoop 3 and the lower - end locking hoop 1 on the corresponding utility poles 6 at a predetermined height respectively. The upper end of the hydraulic support 2 is embedded in the semi - circular groove of the oil - cylinder clamping base 32, close the oil - cylinder clamping cover 37 and lock the locking claw 33.

[0037] Step 2: Place the load-bearing axle pin 8 at the bottom of the hydraulic support 2 into the axle pin slot 26 of the lower end locking hoop 1. The elastic latch 25 will automatically lock. Adjust the relative positions and angles between the lower end locking hoop 1 and the upper end locking hoop 3, and the hydraulic support 2 and the utility pole 6 to make the hydraulic support 2 vertical, and tighten the tension nut 28 and the oil cylinder compression screw 35.

[0038] Step 3: Connect the hydraulic support 2 to related equipment such as hydraulic oil pipes, control lines, and hydraulic pump stations. Start the pump station and the synchronous jog control button, and the two hydraulic supports 2 will rise synchronously. When the boost crossbeam 5 is in full contact with the cross arm 4, loosen the fastening bolts of the cross arm 4 until it can slide slightly.

[0039] Step 4: Synchronously press the control button to make the hydraulic support 2 push the transformer 7 to rise at a uniform speed. When the transformer 7 reaches the specified position, release the button, and the oil circuit of the pump station will be self-locked. Tighten the bolts of the cross arm 4, and the transformer lifting work is completed.

[0040] Step 5: Loosen the anti-falling hook 13 on the boost crossbeam 5, lower the hydraulic support 2 back to the initial state, open the oil cylinder buckle cover 37 and the elastic latch 25, remove the hydraulic support 2, loosen the tension bolt 30, remove the lower end locking hoop 1 and the upper end locking hoop 3, recycle the tool equipment, and clean the site.

[0041] The hydraulic lifting device for distribution transformers of the present invention can lift the distribution transformer and the JP cabinet to the specified height by the synchronous hydraulic propulsion of the bilateral hydraulic struts 2; the upper locking hoop 3 and the lower locking hoop 1 are mainly composed of the hinge-type variable-diameter locking hoop 22, and are fixed on the pole 6 by utilizing the "tapered" characteristic of the non-uniform-diameter pole 6. The bearing pin 8 at the lower end of the hydraulic strut 2 is snapped into the pin slot 26 of the hinge-type variable-diameter locking hoop 22, and is limited by the elastic block 25 to ensure that it will not fall off; the cylinder block 10 at the upper end of the hydraulic strut 2 is snapped into the grooves of the oil cylinder buckle base 32 and the oil cylinder buckle cover 37, and is locked by the locking claw 33 to ensure its stability; the hinge-type variable-diameter locking hoop 22 is formed by rotatably connecting two hinge-type half rings 16 through the rotating shaft nut 21, the variable-diameter adjusting bolt 19 and the tensioning bolt 30. Among them, the hinge-type half ring 16 is formed by rotatably connecting the first arc connecting block 17 with two second arc connecting blocks 15 through the connecting pin 18. Through the cooperation of the variable-diameter adjusting bolt 19 and the tensioning bolt 30, the first arc connecting block 17 and the second arc connecting block 15 can be tightened inward in all directions, effectively overcoming the defect that the traditional hoop can only be locally tightened; after the two sides of the hydraulic struts 2 are fixed, the pistons 11 can be synchronously pushed upward, and the cross arm 4 is pushed upward through the boosting cross beam 5 at the top until the transformer 7 reaches the designated position; the hydraulic lifting device for distribution transformers of the present invention has a reasonable structure and is convenient to operate and use. The method for lifting the distribution transformer of the present invention utilizes the above-mentioned hydraulic lifting device for distribution transformers, can adapt to various external environments, can safely and efficiently complete the work of adjusting the height of the platform frame, effectively improves the work efficiency, and reduces the labor cost and labor intensity.

[0042] Embodiment 2

[0043] As Figures 1-9 shown, the hydraulic lifting device for distribution transformers includes a hydraulic strut 2. The hydraulic strut 2 includes a cylinder block 10 and a piston 11. A bearing plate 9 is connected to the bottom of the cylinder block 10. A bearing pin 8 is arranged on the bearing plate 9. A flange 12 is connected to the top of the piston 11. The flange 12 is connected to a boosting cross beam 5. An anti-falling hook 13 is arranged on the boosting cross beam 5; the bottom of the hydraulic strut 2 is connected to the pole 6 through a lower locking hoop 1, and the upper part of the hydraulic strut 2 is connected to the pole 6 through an upper locking hoop 3. The lower locking hoop 1 includes a hinge-type variable-diameter locking hoop 22 and a support hinge seat 23. The upper locking hoop 3 includes a hinge-type variable-diameter locking hoop 22 and a double semi-circular clamping device 36.

[0044] The hinge - type variable - diameter locking hoop 22 includes two hinge - type half - rings 16. The hinge - type half - ring 16 includes a first arc - shaped connecting block 17 and two second arc - shaped connecting blocks 15. Both ends of the first arc - shaped connecting block 17 are rotatably connected to the second arc - shaped connecting block 15 through connecting pin shafts 18. Both ends of the left - hand hinge - type half - ring 16 are rotatably connected to a rotating shaft nut 21. The upper end of the right - hand hinge - type half - ring 16 is rotatably connected to a rotating shaft nut 21, and the lower end is fixedly connected to an opening baffle 29. The upper parts of the left - and right - hand hinge - type half - rings 16 are connected by variable - diameter adjusting bolts 19, and the lower parts of the left - and right - hand hinge - type half - rings 16 are connected by tension bolts 30. Both ends of the variable - diameter adjusting bolt 19 are threadedly connected to the rotating shaft nuts 21 on both sides thereof. The tension bolt 30 is threadedly connected to the rotating shaft nut 21 on its left side, and a tension nut 28 is arranged on the tension bolt 30.

[0045] The supporting hinge seat 23 includes a hinge - seat plate 27. An axle - pin slot 26 adapted to the bearing axle pin 8 is arranged on the hinge - seat plate 27. An elastic clamping block 25 is slidably connected to the right end of the hinge - seat plate 27. A locking spring 31 is connected between the elastic clamping block 25 and the hinge - seat plate 27. A clamping - block handle 24 is connected to the right end of the elastic clamping block 25. The supporting hinge seat 23 is fixedly connected to the right end of the hinge - type variable - diameter locking hoop 22 through the hinge - seat plate 27 to form the lower - end locking hoop 1.

[0046] The double - semi - circle clamping device 36 includes an oil - cylinder clamping base 32. The oil - cylinder clamping base 32 is rotatably connected to an oil - cylinder clamping cover 37 through a hinge 38. Semi - circular grooves for clamping the hydraulic support 2 are arranged on both the oil - cylinder clamping base 32 and the oil - cylinder clamping cover 37. A locking claw 33 is rotatably connected to the upper end of the oil - cylinder clamping cover 37. The right end of the locking claw 33 is connected to the oil - cylinder clamping cover 37 through a return spring 34. An oblong hole 39 is arranged on the oil - cylinder clamping base 32. The double - semi - circle clamping device 36 is connected to the hinge - type variable - diameter locking hoop 22 through the oblong hole 39 and bolts thereon to form the upper - end locking hoop 3.

[0047] For better effect, the boosting cross - beam 5 is an I - beam or an H - beam. The anti - falling hooks 13 are arranged at both ends of the boosting cross - beam 5. One end of the anti - falling hook 13 is rotatably connected to the boosting cross - beam 5, and the middle part of the anti - falling hook 13 is connected to the boosting cross - beam 5 through an anti - falling spring 14. Using common steel sections for the boosting cross - beam 5 can facilitate the manufacture and installation of the equipment and reduce costs. When the anti - falling hook 13 hooks the cross - arm 4, under the pulling force of the anti - falling spring 14, the anti - falling hook 13 will not actively disengage from the hooked state, ensuring the efficient installation of the hydraulic support 2.

[0048] For better effect, an intermediate adjusting nut 20 is provided in the middle of the diameter-changing adjusting bolt 19, and the thread directions on both sides of the diameter-changing adjusting bolt 19 are opposite; by rotating the intermediate adjusting nut 20, the entire diameter-changing adjusting bolt 19 can be driven to rotate, so as to increase or decrease the distance between the left and right hinge half-rings 16, so as to adjust the size of the hinge type diameter-changing locking hoop 22, so as to adapt to the line poles 6 of different sizes; the diameter-changing adjusting bolt 19 is threadedly connected to the rotating shaft nuts 21 on both sides of it. By setting the thread directions on both sides to be opposite instead of setting the thread directions on the left and right rotating shaft nuts 21 to be opposite, the connection stability can be improved, and at the same time, it is convenient to replace the diameter-changing adjusting bolt 19 when the thread has problems, improving the practicability of the device.

[0049] For better effect, one end of the opening baffle 29 is an inclined plate that can prevent the tensioning nut 28 from slipping out, which can effectively prevent the tensioning nut 28 from slipping out of the opening baffle 29, improving the safety of the device.

[0050] For better effect, the elastic clamping block 25 includes a sliding clamping block 40. The left end face of the sliding clamping block 40 is an inclined surface. A T-shaped guiding boss 41 is arranged on the sliding clamping block 40, and a pull plate 42 is connected to the right end of the sliding clamping block 40; the sliding of the elastic clamping block can be realized through the cooperation of the guiding boss 41 and the guiding groove arranged inside the right end of the hinge seat plate 27; during the process of the bearing pin 8 being inserted into the pin slot 26, the elastic clamping block 25 can be pushed to slide to the right by the inclined left end face of the sliding clamping block 20. After the bearing pin 8 is completely locked into the pin slot 26, the elastic clamping block 25 returns to its original position under the pulling force of the locking spring 31 and forms a lock on the bearing pin 8, preventing it from accidentally slipping out of the pin slot 26 and improving the safety of the device.

[0051] A method for lifting a distribution transformer uses the described hydraulic lifting device for the distribution transformer, and it includes the following steps:

[0052] Step 1: Connect the boosting cross beam 5 to the flange 12 at the top end of the piston 11, lift it to the bottom of the cross arm 4 of the transformer 7, and hook the anti-falling hook 13 on the cross arm 4; fix the upper locking hoop 3 and the lower locking hoop 1 on the corresponding line poles 6 at a predetermined height respectively. The upper end of the hydraulic support column 2 is embedded in the semi-circular groove of the oil cylinder buckle base 32, close the oil cylinder buckle cover 37 and buckle the locking claw 33.

[0053] Step 2: Place the load-bearing pin 8 at the bottom of the hydraulic support 2 into the pin slot 26 of the lower end locking hoop 1. The elastic latch 25 will automatically lock. Adjust the relative positions and angles between the lower end locking hoop 1 and the upper end locking hoop 3, and the hydraulic support 2 and the pole 6 to make the hydraulic support 2 vertical. Tighten the tension nut 28 and the oil cylinder compression screw 35.

[0054] Step 3: Connect the hydraulic support 2 to related equipment such as hydraulic oil pipes, control lines, and hydraulic pump stations. Start the pump station and the synchronous jog control button. The two hydraulic supports 2 will rise synchronously. When the boost crossbeam 5 is in full contact with the cross arm 4, loosen the fastening bolts of the cross arm 4 until it can slide slightly.

[0055] Step 4: Synchronously press the control button to make the hydraulic support 2 push the transformer 7 to rise evenly. When the transformer 7 reaches the designated position, release the button. The oil circuit of the pump station will be self-locked. Tighten the bolts of the cross arm 4, and the transformer lifting work is completed.

[0056] Step 5: Loosen the anti-falling hook 13 on the boost crossbeam 5. Lower the hydraulic support 2 to the initial state. Open the oil cylinder buckle cover 37 and the elastic latch 25. Remove the hydraulic support 2. Loosen the tension bolt 30 to remove the lower end locking hoop 1 and the upper end locking hoop 3. Recover the tool equipment and clean the site.

[0057] The hydraulic lifting device for distribution transformers of the present invention can lift the distribution transformer and the JP cabinet to the specified height by the synchronous hydraulic propulsion of the bilateral hydraulic struts 2; the upper locking hoop 3 and the lower locking hoop 1 are mainly composed of the hinge-type variable-diameter locking hoop 22, and are fixed on the pole 6 by using the "tapered" characteristic of the non-uniform-diameter pole 6. The bearing pin 8 at the lower end of the hydraulic strut 2 is snapped into the pin slot 26 of the hinge-type variable-diameter locking hoop 22, and is limited by the elastic block 25 to ensure that it will not fall off; the cylinder body 10 at the upper end of the hydraulic strut 2 is snapped into the grooves of the oil cylinder buckle base 32 and the oil cylinder buckle cover 37, and is locked by the locking claw 33 to ensure its stability; the hinge-type variable-diameter locking hoop 22 is formed by rotatably connecting two hinge-type half rings 16 through the rotating shaft nut 21, the variable-diameter adjusting bolt 19 and the tensioning bolt 30. Among them, the hinge-type half ring 16 is formed by rotatably connecting the first arc connecting block 17 with two second arc connecting blocks 15 through the connecting pin 18. Through the cooperation of the variable-diameter adjusting bolt 19 and the tensioning bolt 30, the first arc connecting block 17 and the second arc connecting block 15 can be tightened in all directions inward, effectively overcoming the defect that the traditional hoop can only be partially tightened; after the two sides of the hydraulic struts 2 are fixed, the pistons 11 can be synchronously pushed upward, and the cross arm 4 is pushed upward through the boosting cross beam 5 at the top until the transformer 7 reaches the designated position; the hydraulic lifting device for distribution transformers of the present invention has a reasonable structure and is convenient to operate and use. The method for lifting the distribution transformer of the present invention utilizes the above-mentioned hydraulic lifting device for distribution transformers, can adapt to various external environments, can safely and efficiently complete the work of adjusting the height of the platform frame, effectively improves the work efficiency, and reduces the labor cost and labor intensity.

Claims

1. A hydraulic lifting device for a distribution transformer, which comprises a hydraulic support (2), and is characterized in that: The hydraulic support (2) includes a cylinder block (10) and a piston (11). A bearing plate (9) is connected to the bottom of the cylinder block (10). A bearing axle pin (8) is arranged on the bearing plate (9). A flange plate (12) is connected to the top end of the piston (11). The flange plate (12) is connected to a boosting cross beam (5). An anti-falling hook (13) is arranged on the boosting cross beam (5). The bottom of the hydraulic support (2) is connected to a pole (6) through a lower end locking hoop (1). The upper part of the hydraulic support (2) is connected to the pole (6) through an upper end locking hoop (3). The lower end locking hoop (1) includes a hinge type variable diameter locking hoop (22) and a support hinge seat (23). The upper end locking hoop (3) includes a hinge type variable diameter locking hoop (22) and a double semi-circular clamping device (36). The hinge type variable diameter locking hoop (22) includes two hinge type semi-rings (16). The hinge type semi-ring (16) includes a first arc connecting block (17) and two second arc connecting blocks (15). Both ends of the first arc connecting block (17) are rotatably connected to the second arc connecting blocks (15) through connecting pin shafts (18). Rotating shaft nuts (21) are rotatably connected to both ends of the left hinge type semi-ring (16). A rotating shaft nut (21) is rotatably connected to the upper end of the right hinge type semi-ring (16), and an opening baffle (29) is fixedly connected to the lower end. The upper parts of the left and right hinge type semi-rings (16) are connected through a variable diameter adjusting bolt (19). The lower parts of the left and right hinge type semi-rings (16) are connected through a tensioning bolt (30). Both ends of the variable diameter adjusting bolt (19) are threadedly connected to the rotating shaft nuts (21) on both sides thereof. The tensioning bolt (30) is threadedly connected to the rotating shaft nut (21) on its left side. A tensioning nut (28) is arranged on the tensioning bolt (30). The support hinge seat (23) includes a hinge seat plate (27). An axle pin slot (26) adapted to the bearing axle pin (8) is arranged on the hinge seat plate (27). An elastic clamping block (25) is slidably connected to the right end of the hinge seat plate (27). A locking spring (31) is connected between the elastic clamping block (25) and the hinge seat plate (27). A clamping block handle (24) is connected to the right end of the elastic clamping block (25). The support hinge seat (23) is fixedly connected to the right end of the hinge type variable diameter locking hoop (22) through the hinge seat plate (27) to form the lower end locking hoop (1). The double semi-circular clamping device (36) includes an oil cylinder buckle base (32). The oil cylinder buckle base (32) is rotatably connected to an oil cylinder buckle cover (37) through a hinge (38). Semi-circular grooves for buckling the hydraulic support (2) are provided on both the oil cylinder buckle base (32) and the oil cylinder buckle cover (37). A locking claw (33) is rotatably connected to the upper end of the oil cylinder buckle cover (37). The right end of the locking claw (33) is connected to the oil cylinder buckle cover (37) through a return spring (34). A long circular hole (39) is provided on the oil cylinder buckle base (32). The double semi-circular clamping device (36) is connected to the hinge-type variable-diameter locking hoop (22) through the long circular hole (39) and bolts thereon to form the upper end locking hoop (3). The boosting cross beam (5) is an I-beam or an H-beam. The anti-falling hooks (13) are arranged at both ends of the boosting cross beam (5). One end of the anti-falling hook (13) is rotatably connected to the boosting cross beam (5). The middle of the anti-falling hook (13) is connected to the boosting cross beam (5) through an anti-falling spring (14). A middle adjusting nut (20) is arranged in the middle of the variable-diameter adjusting bolt (19). The thread directions on both sides of the variable-diameter adjusting bolt (19) are opposite.

2. The hydraulic lifting device for a distribution transformer according to claim 1, characterized in that: One end of the opening baffle (29) is an inclined plate that can prevent the tension nut (28) from slipping out.

3. The hydraulic lifting device for a distribution transformer according to claim 1, characterized in that: The elastic clamping block (25) includes a sliding clamping block (40). The left end face of the sliding clamping block (40) is an inclined plane. A T-shaped guiding boss (41) is arranged on the sliding clamping block (40). A pulling plate (42) is connected to the right end of the sliding clamping block (40).

4. Method for lifting a distribution transformer, which uses the distribution transformer hydraulic lifting device as described in claim 1, characterized in that: It includes the following steps: Step 1: Connect the boosting cross beam (5) to the flange plate (12) at the top end of the piston (11), lift it to the bottom of the cross arm (4) of the transformer (7), and hook the anti-falling hook (13) on the cross arm (4). Fix the upper end locking hoop (3) and the lower end locking hoop (1) on the corresponding utility poles (6) at a predetermined height respectively. The upper end of the hydraulic support (2) is embedded in the semi-circular groove of the oil cylinder buckle base (32), close the oil cylinder buckle cover (37) and buckle the locking claw (33). Step 2: Place the bearing pin (8) at the bottom of the hydraulic support (2) into the pin slot (26) of the lower end locking hoop (1). The elastic clamping block (25) is automatically locked. Adjust the relative positions and angles between the lower end locking hoop (1), the upper end locking hoop (3), the hydraulic support (2), and the utility pole (6) to make the hydraulic support (2) vertical, and tighten the tension nut (28) and the oil cylinder pressing screw (35). Step 3: Connect the hydraulic support (2) with related equipment such as hydraulic oil pipes, control lines, and hydraulic pump stations. Start the pump station and the synchronous jog control button, and the two hydraulic supports (2) rise synchronously. When the boosting crossbeam (5) is in full contact with the cross arm (4), loosen the fastening bolts of the cross arm (4) until it can slide slightly; Step 4: Synchronously press the control button to make the hydraulic support (2) push the transformer (7) to rise evenly. When the transformer (7) rises to the specified position, release the button, and the oil circuit of the pump station is self-locked. Tighten the bolts of the cross arm (4), and the transformer lifting work is completed; Step 5: Loosen the anti-falling hook (13) on the boosting crossbeam (5), lower the hydraulic support (2) to the initial state, open the oil cylinder buckle gland (37) and the elastic block (25), remove the hydraulic support (2), loosen the tension bolt (30), remove the lower end locking hoop (1) and the upper end locking hoop (3), recover the tool equipment, and clean the site.

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