Transformer hoisting device

Abstract

The present application provides a transformer lifting device, which belongs to the field of lifting technology, and includes a lifting frame, a load-bearing beam, a pulley frame, a lifting sling and a winch; the lifting sling is composed of a main lifting rope, an auxiliary rope for entering the well and an auxiliary rope for exiting the well, and the main lifting rope, the auxiliary rope for entering the well and the auxiliary rope for exiting the well correspond to three fixed pulleys arranged on the pulley frame one by one, the hook at the lifting end of the main lifting rope is connected to the load-bearing beam, and the lifting ends of the auxiliary rope for entering the well and the auxiliary rope for exiting the well are both connected to a frame body on the lifting frame away from the side of the well doorway; guide wheels are arranged at the two bottom corners on the lifting frame away from the well doorway, and movable wheels are slidably connected at the two bottom corners on the lifting frame on the side close to the well doorway, and a driving member for extending or retracting the movable wheel into the lifting frame is arranged on the lifting frame; the present application can reduce the probability of excessive friction between the lifting rope and the top wall of the well doorway during the process of the transformer entering and exiting the well doorway

Description

Technical Field

[0001] The present application relates to the field of hoisting technology, and in particular to a transformer hoisting device. Background Art

[0002] A transformer is an electrical device used to change the size of AC voltage. Its main function is to reduce or increase the voltage at the input end and isolate the electrical connection between the input and output ends to provide safety protection. In power systems, transformers are widely used in power transmission and distribution, and are also used in various electronic devices and household appliances. In order to meet different types of power demand, the installation and application scenarios of transformers will also change accordingly.

[0003] Among them, when the transformer is installed inside a high-rise building, due to the large mass of the transformer, it is often necessary to use a lifting device to lift the transformer to the designated floor. Referring to the Chinese patent document with the authorization announcement number CN220165633U and the announcement date of December 12, 2023, the name is a transformer lifting device, including a lifting shell and a hook, which can position the transformer during the lifting process to prevent the transformer from shaking excessively during the lifting process.

[0004] Referring to the above technical solution, for high-rise buildings, the lifting work of the transformer is generally carried out in the elevator shaft or vertical shaft. Due to the spatial structure of the shaft, the installation of the hook and the transformer needs to be carried out before the transformer enters the shaft. The hook will be removed after the transformer is lifted to the designated floor and moved out of the shaft. Therefore, in the process of the transformer entering and exiting the shaft door opening, the lifting rope connected to the hook will tilt accordingly, and the tilted lifting rope may cause excessive friction and wear with the top wall of the shaft door opening, thereby affecting the safety and reliability of the lifting device in subsequent use. Summary of the invention

[0005] In view of this, the present application provides a transformer hoisting device, which is mainly used to solve the problem of excessive friction and wear of the hoisting rope against the top wall of the hoistway doorway when the transformer enters and exits the hoistway doorway.

[0006] In order to solve the above technical problems, the present application provides a transformer lifting device, including a lifting frame, a load-bearing beam arranged on the lifting frame, a pulley frame arranged on the top of the well, a lifting sling matched with the pulley frame, and a winch for retracting and releasing the lifting sling; the lifting sling is composed of a main lifting rope, an auxiliary rope for entering the well and an auxiliary rope for exiting the well, and the main lifting rope, the auxiliary rope for entering the well and the auxiliary rope for exiting the well correspond to three fixed pulleys arranged on the pulley frame one by one, the hook at the lifting end of the main lifting rope is connected with the load-bearing beam, and the lifting ends of the auxiliary rope for entering the well and the auxiliary rope for exiting the well are both connected to a frame body on the lifting frame away from the well doorway; guide wheels are arranged at the two bottom corners on the lifting frame away from the well doorway, and movable wheels are slidably connected at the two bottom corners on the lifting frame close to the well doorway, and a driving member for extending or retracting the movable wheel into the lifting frame is arranged on the lifting frame.

[0007] By adopting the above technical solution and utilizing the mutual cooperation of the main hoisting rope, the auxiliary rope for entering the well and the auxiliary rope for exiting the well, the possibility of excessive friction between the three and the top wall of the well doorway is reduced, thereby improving the service life and safety of the hoisting device.

[0008] Optionally, the auxiliary rope for entering the well and the auxiliary rope for exiting the well are both double-strand ropes, and the two hoisting ends of the auxiliary rope for entering the well and the two hoisting ends of the auxiliary rope for exiting the well are corresponding to and connected to two top corners on the hoisting frame on the side away from the well doorway.

[0009] By adopting the above technical solution, the stability of the auxiliary rope for entering the well and the auxiliary rope for exiting the well when pulling the hoisting frame can be further improved.

[0010] Optionally, the driving member includes a screw rod rotatably connected to the interior of the hanging frame and used to extend or retract the movable wheel into the hanging frame, and the hanging frame is provided with a servo motor for driving the screw rod to rotate.

[0011] By adopting the above technical solution, when the servo motor drives the screw to rotate, the movable wheel will move accordingly to change its relative position with the hanging frame.

[0012] Optionally, the load-bearing beam is vertically slidably connected at the top center of the hanging frame.

[0013] By adopting the above technical solution, when the load-bearing beam is lifted by the main lifting rope, the load-bearing beam will preferentially rise a certain distance inside the load-bearing beam, so that the transformer connected to the load-bearing beam is lifted and completely suspended inside the lifting frame, so as to prevent the transformer from colliding or rubbing with the building during the lifting process.

[0014] Optionally, a locking nut is threadedly connected to the bottom of the vertical sliding opening where the load-bearing beam on the hanging frame is located, so as to lock the relative position of the load-bearing beam and the hanging frame after the load-bearing beam slides vertically.

[0015] By adopting the above technical solution, when the transformer is suspended inside the hanging frame, personnel can lock the position of the load-bearing beam and the transformer by tightening the locking nut upwards.

[0016] Optionally, a positioning assembly is provided on the hanging frame for clamping and positioning the transformer inside the hanging frame during the hanging process.

[0017] By adopting the above technical solution, during the hoisting process, the transformer located inside the hoisting frame is clamped and positioned using the positioning assembly to prevent the transformer from shaking.

[0018] Optionally, the positioning assembly includes two clamping plates hinged to the top of the hanging frame, and both clamping plates are provided with tension springs connected to the load-bearing beam.

[0019] By adopting the above technical solution, after the transformer is connected to the load-bearing beam, the two clamping plates will be tightened inwards due to the tension of the tension spring, so as to further clamp the transformer.

[0020] Optionally, the clamping plates are each provided with a rubber pad for replacing the clamping plates in contact with the transformer.

[0021] By adopting the above technical solution, when the rubber pad contacts the transformer instead of the clamping plate, it can prevent the transformer from being pinched to a certain extent.

[0022] In summary, compared with the prior art, the present application includes at least one of the following beneficial technical effects:

[0023] 1. Use multiple lifting ropes to improve the stability of the lifting process, and change the lifting force point when the transformer enters and exits the shaft door opening, reducing the difficulty and danger of personnel operation, and at the same time reducing the probability of excessive friction between the lifting rope and the top wall of the shaft door opening.

[0024] 2. During the hoisting process of the transformer, the transformer can be further clamped and fixed to prevent the transformer from relative shaking displacement with the hoisting frame during the hoisting process, thereby reducing the possibility of the transformer falling off during the hoisting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of a transformer hoisting device for this application;

[0026] Figure 2 This is a front view of a transformer hoisting device for this application;

[0027] Figure 3 For this application Figure 1 A partial enlarged view of the middle area A;

[0028] Figure 4This is a schematic diagram of the structure of the hoisting frame for this application;

[0029] Figure 5 A cross-sectional view of the hanging frame for this application;

[0030] Figure 6 For this application Figure 5 A partial enlarged view of the middle area B;

[0031] Figure 7 For this application Figure 5 A partial enlarged view of area C in the middle.

[0032] Explanation of the reference numerals in the accompanying drawings: 1. Hoisting frame; 11. Load-bearing beam; 12. Guide wheel; 13. Movable wheel; 14. Driving member; 141. Screw rod; 142. Servo motor; 2. Pulley frame; 21. Fixed pulley; 3. Lifting sling; 31. Main lifting rope; 32. Auxiliary rope for entering the well; 33. Auxiliary rope for exiting the well; 4. Winch; 5. Locking nut; 6. Positioning assembly; 61. Clamp; 62. Tension spring; 63. Rubber pad. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the embodiments of the present application. Figure 1-Figure 7 , the technical solutions of the embodiments of the present application are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

[0034] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 The present embodiment provides a transformer hoisting device, including a hoisting frame 1 and a hoisting sling 3. The hoisting frame 1 is provided with a load-bearing beam 11 for connecting the transformer, the top of the shaft is provided with a pulley frame 2 matching the hoisting sling 3, and the top of the building is provided with a winch 4 for retracting and releasing the hoisting sling 3.

[0035] The lifting sling 3 is composed of a main lifting rope 31, an auxiliary rope for entering the well 32 and an auxiliary rope for exiting the well 33. Three fixed pulleys 21 are arranged on the pulley frame 2, and the main lifting rope 31 corresponds to the fixed pulley 21 in the center position on the pulley frame 2, the auxiliary rope for entering the well 32 corresponds to the fixed pulley 21 on the pulley frame 2 away from the well doorway, and the auxiliary rope for exiting the well 33 corresponds to the fixed pulley 21 on the pulley frame 2 close to the well doorway. The hook at the lifting end of the main lifting rope 31 is connected to the load-bearing beam 11, and the lifting ends of the auxiliary rope for entering the well 32 and the auxiliary rope for exiting the well 33 are both connected to the frame of the lifting frame 1 away from the well doorway.

[0036] Guide wheels 12 are provided at the two bottom corners of the hoisting frame 1 away from the hoisting doorway, and movable wheels 13 are slidably connected at the two bottom corners of the hoisting frame 1 close to the hoisting doorway. A driving member 14 is provided on the hoisting frame 1 for extending or retracting the movable wheel 13 into the hoisting frame 1.

[0037] Among them, the winch 4 can, through the cooperation of an external clutch and an external differential, have three relatively independent winding drums corresponding to the main lifting rope 31, the auxiliary rope for entering the well 32 and the auxiliary rope for exiting the well 33, and can also directly use three independent winches 4 to independently retract and release the main lifting rope 31, the auxiliary rope for entering the well 32 and the auxiliary rope for exiting the well 33.

[0038] When carrying out the lifting work of the transformer, the transformer is first connected to the load-bearing beam 11. When the lifting frame 1 enters the well through the well doorway, the lifting ends of the well-entry auxiliary rope 32 and the well-exit auxiliary rope 33 are first connected to the lifting frame 1, and then the hook at the lifting end of the main lifting rope 31 is connected to the load-bearing beam 11 to complete the lifting preparation work.

[0039] Then, the driving member 14 cooperates to make the movable wheel 13 extend out of the hoisting frame 1, and at the same time, the hoisting machine 4 appropriately reels the auxiliary rope 32 for entering the well to make the hoisting frame 1 enter the well, until the guide wheel 12 abuts against the inner wall of the well. In this process, the auxiliary rope 33 for exiting the well and the main hoisting rope 31 are in a relaxed state and will not cause excessive friction with the top wall of the well doorway. The auxiliary rope 32 for entering the well is in a taut state to pull the hoisting frame 1, and the movable wheel 13 overlaps the bottom plate of the well doorway to support the hoisting frame 1, so as to prevent the hoisting frame 1 from falling into the well.

[0040] Then the driving member 14 retracts the movable wheel 13 into the hoisting frame 1. After the winch 4 rewinds the main hoisting rope 31 and the auxiliary rope 33 for getting out of the well to a taut state, the winch 4 rewinds the main hoisting rope 31, the auxiliary rope 32 for getting into the well and the auxiliary rope 33 for getting out of the well to make the hoisting frame 1 rise.

[0041] When the hoisting frame 1 is lifted to the designated floor and moved out of the well through the well doorway, the movable wheel 13 is extended out of the hoisting frame 1 through the cooperation of the driving member 14 again and overlapped with the bottom plate of the well doorway of that floor, and then the winch 4 unwinds the main hoisting rope 31 and the well-entry auxiliary rope 32 to a relaxed state at a low speed, and at the same time, the winch 4 tightens the well-entry auxiliary rope 33 at a low speed. At this time, the well-entry auxiliary rope 33 will gradually recover from the inclined state to the vertical state due to the gravity of the hoisting frame 1 itself, so that the hoisting frame 1 is in a semi-suspended state with half of the frame entering the well doorway and the other half of the frame still in the well. After the personnel connect the external pulling device to the hoisting frame 1 and remove the main hoisting rope 31, the well-entry auxiliary rope 32 and the well-entry auxiliary rope 33, the hoisting frame 1 is moved to a safe position through the cooperation of the external pulling device, and finally the personnel remove the transformer from the hoisting frame 1 to complete the transformer hoisting work.

[0042] Reference Figure 1 and Figure 3 The well-entry auxiliary rope 32 and the well-exit auxiliary rope 33 are both double-strand ropes, and the two hoisting ends of the well-entry auxiliary rope 32 and the two hoisting ends of the well-exit auxiliary rope 33 are one-to-one corresponding to and connected to the two top corners of the hoisting frame 1 on the side away from the wellway doorway.

[0043] When the well-entry auxiliary rope 32 and the well-exit auxiliary rope 33 are connected to the two top corners of the hoisting frame 1 away from the well doorway, the stability of the well-entry auxiliary rope 32 and the well-exit auxiliary rope 33 when pulling the hoisting frame 1 can be further improved.

[0044] Reference Figure 4 The driving member 14 includes a screw rod 141 and a servo motor 142. The screw rod 141 is rotatably connected to the interior of the hanging frame 1 and is used to extend or retract the movable wheel 13 into the hanging frame 1. The servo motor 142 is arranged on the hanging frame 1 and is used to drive the screw rod 141 to rotate.

[0045] When the servo motor 142 drives the screw rod 141 to rotate, the movable wheel 13 will move accordingly and change its relative position with the hanging bracket 1 .

[0046] Reference Figure 4 The load-bearing beam 11 is vertically slidably connected at the top center of the hanging frame 1.

[0047] When the load-bearing beam 11 is lifted by the main hoisting rope 31, the load-bearing beam 11 will preferentially rise a certain distance inside the load-bearing beam 11, so that the transformer connected to the load-bearing beam 11 is lifted and completely suspended inside the hoisting frame 1, so as to prevent the transformer from colliding or rubbing with the building during the hoisting process.

[0048] Reference Figure 5 and Figure 6 A locking nut 5 is threadedly connected to the bottom of the vertical sliding opening where the load-bearing beam 11 on the hanging frame 1 is located, and is used to lock the relative position of the load-bearing beam 11 and the hanging frame 1 after the load-bearing beam 11 slides vertically.

[0049] When the transformer is suspended in the hanging frame 1 , personnel can lock the position of the load-bearing beam 11 and the transformer by tightening the locking nut 5 upwards.

[0050] Reference Figure 4 and Figure 5 A positioning assembly 6 is provided on the hanging frame 1 for clamping and positioning the transformer inside the hanging frame 1 during the hanging process.

[0051] Reference Figure 5 and Figure 7The positioning assembly 6 includes two clamping plates 61 and a tension spring 62. The two clamping plates 61 are symmetrically hinged on the top of the hanging frame 1, and the tension spring 62 is arranged between the load-bearing beam 11 and the clamping plates 61.

[0052] Reference Figure 5 The clamping plates 61 are provided with rubber pads 63 for replacing the clamping plates 61 and contacting the transformer.

[0053] After the transformer is connected to the load-bearing beam 11, the two clamps 61 will be tightened inward due to the tension of the tension spring 62 so as to further clamp the transformer; and when the load-bearing beam 11 is arranged on the hoisting frame 1 in a vertical sliding connection manner, after the load-bearing beam 11 rises inside the load-bearing beam 11 under the action of the main hoisting rope 31, the tightening degree of the two clamps 61 will be further improved, thereby applying a greater clamping force to the transformer, reducing the possibility of the transformer shaking and falling off during the hoisting process, and the rubber pad 63 can prevent the transformer from being clamped to a certain extent when it contacts the transformer instead of the clamp 61.

[0054] The implementation principle of a transformer hoisting device in the embodiment of the present application is as follows:

[0055] When carrying out the lifting work of the transformer, the transformer is first connected to the load-bearing beam 11. When the lifting frame 1 enters the well through the well doorway, the lifting ends of the well-entry auxiliary rope 32 and the well-exit auxiliary rope 33 are first connected to the lifting frame 1, and then the hook at the lifting end of the main lifting rope 31 is connected to the load-bearing beam 11 to complete the lifting preparation work.

[0056] Then, the driving member 14 cooperates to make the movable wheel 13 extend out of the hoisting frame 1, and at the same time, the hoisting machine 4 appropriately reels the auxiliary rope 32 for entering the well to make the hoisting frame 1 enter the well, until the guide wheel 12 abuts against the inner wall of the well. In this process, the auxiliary rope 33 for exiting the well and the main hoisting rope 31 are in a relaxed state and will not cause excessive friction with the top wall of the well doorway. The auxiliary rope 32 for entering the well is in a taut state to pull the hoisting frame 1, and the movable wheel 13 overlaps the bottom plate of the well doorway to support the hoisting frame 1, so as to prevent the hoisting frame 1 from falling into the well.

[0057] Then the driving member 14 retracts the movable wheel 13 into the hoisting frame 1. After the winch 4 rewinds the main hoisting rope 31 and the auxiliary rope 33 for getting out of the well to a taut state, the winch 4 rewinds the main hoisting rope 31, the auxiliary rope 32 for getting into the well and the auxiliary rope 33 for getting out of the well to make the hoisting frame 1 rise.

[0058] When the hoisting frame 1 is lifted to the designated floor and moved out of the well through the well doorway, the movable wheel 13 is extended out of the hoisting frame 1 through the cooperation of the driving member 14 again and overlapped with the bottom plate of the well doorway of that floor, and then the winch 4 unwinds the main hoisting rope 31 and the well-entry auxiliary rope 32 to a relaxed state at a low speed, and at the same time, the winch 4 tightens the well-entry auxiliary rope 33 at a low speed. At this time, the well-entry auxiliary rope 33 will gradually recover from the inclined state to the vertical state due to the gravity of the hoisting frame 1 itself, so that the hoisting frame 1 is in a semi-suspended state with half of the frame entering the well doorway and the other half of the frame still in the well. After the personnel connect the external pulling device to the hoisting frame 1 and remove the main hoisting rope 31, the well-entry auxiliary rope 32 and the well-entry auxiliary rope 33, the hoisting frame 1 is moved to a safe position through the cooperation of the external pulling device, and finally the personnel remove the transformer from the hoisting frame 1 to complete the transformer hoisting work.

[0059] In addition, it should be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0060] The above is a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles described in the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A transformer hoisting device, comprising a hoisting frame (1), a load-bearing beam (11) arranged on the hoisting frame (1), a pulley frame (2) arranged on the top of a shaft, a sling (3) matched with the pulley frame (2), and a winch (4) for retracting and releasing the sling (3), characterized in that: The sling (3) is composed of a main hoisting rope (31), an auxiliary rope for entering the well (32) and an auxiliary rope for exiting the well (33), and the main hoisting rope (31), the auxiliary rope for entering the well (32) and the auxiliary rope for exiting the well (33) correspond to three fixed pulleys (21) provided on the pulley frame (2) in a one-to-one manner, the hook at the hoisting end of the main hoisting rope (31) is connected to the load-bearing beam (11), and the hoisting ends of the auxiliary rope for entering the well (32) and the auxiliary rope for exiting the well (33) are both connected to a frame body on the hoisting frame (1) on a side away from the well doorway; Guide wheels (12) are provided at two bottom corners of the hoisting frame (1) on a side away from the hoistway door opening, movable wheels (13) are slidably connected at two bottom corners of the hoisting frame (1) on a side close to the hoistway door opening, and a driving member (14) for extending or retracting the movable wheel (13) is provided on the hoisting frame (1); The auxiliary rope (33) for getting out of the well is arranged at an angle; The hoisting frame (1) is provided with a positioning assembly (6) for clamping and positioning the transformer located inside the hoisting frame (1) during the hoisting process; The positioning assembly (6) comprises two clamping plates (61) hinged to the top of the hanging frame (1), and the two clamping plates (61) are both provided with tension springs (62) connected to the load-bearing beam (11); The clamping plates (61) are each provided with a rubber pad (63) for replacing the clamping plates (61) in contact with the transformer.

2. A transformer hoisting device according to claim 1, characterized in that: The well-entry auxiliary rope (32) and the well-exit auxiliary rope (33) are both double-strand ropes, and the two hoisting ends of the well-entry auxiliary rope (32) and the two hoisting ends of the well-exit auxiliary rope (33) correspond to and are connected to two top corners of the hoisting frame (1) on a side away from the well doorway.

3. A transformer hoisting device according to claim 1, characterized in that: The driving member (14) comprises a screw rod (141) rotatably connected to the interior of the hanging frame (1) and used to extend or retract the movable wheel (13) into the hanging frame (1); a servo motor (142) is provided on the hanging frame (1) for driving the screw rod (141) to rotate.

4. A transformer hoisting device according to claim 1, characterized in that: The load-bearing beam (11) is vertically slidably connected at the top center of the hanging frame (1).

5. A transformer hoisting device according to claim 4, characterized in that: A locking nut (5) is threadedly connected to the bottom of the vertical sliding opening where the load-bearing beam (11) on the hanging frame (1) is located, and is used to lock the relative position of the load-bearing beam (11) and the hanging frame (1) after the load-bearing beam (11) slides vertically.

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