Hoisting tool for overhauling voltage regulating switch of transformer

Abstract

The invention belongs to the technical field of transformer maintenance, and particularly relates to a transformer voltage regulating switch maintenance hoisting tool which comprises a bottom beam. The bidirectional adjusting assembly is fixedly arranged on the side wall of the bottom beam; the two base assemblies are slidably arranged at the two ends of the bottom beam in a sleeving mode, and the base assemblies are in threaded connection with the two-way adjusting assembly; the first telescopic rod is fixedly arranged at the top of one end of the base assembly, and the first telescopic rod is vertically arranged; one end of the hoisting assembly is fixedly connected to the top end of the first telescopic rod; and the auxiliary supporting assembly is hinged to the top of the other end of the base assembly, and the auxiliary supporting assembly is used for supporting the other end of the hoisting assembly. The hoisting efficiency of transformer maintenance work can be improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of transformer maintenance, and particularly relates to a hoisting tool for overhauling a transformer voltage regulating switch. Background Art

[0002] A transformer refers to a device that uses the principle of electromagnetic induction to change the AC voltage.

[0003] Transformers can be classified into power transformers and special transformers according to their uses. Power transformers are mainly used in power transmission and distribution lines to change the magnitude of the AC voltage to meet the needs of different users. Special transformers are used in special fields such as smelting, electric processing, electric drive, communication, and automatic control. Its main components are the primary coil, secondary coil, and iron core. The main functions of a transformer are: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilization, etc. Transformers are basic equipment for power transmission and distribution and are widely used in industries, agriculture, transportation, urban communities, and other fields.

[0004] During the use of a transformer, the voltage regulating switch needs to be regularly overhauled. Summary of the Invention

[0005] The purpose of the present invention is to provide a hoisting tool for overhauling a transformer voltage regulating switch to assist in the overhaul work of the transformer voltage regulating switch and improve the work efficiency of the overhaul work.

[0006] To achieve the above purpose, the present invention provides the following solution: A hoisting tool for overhauling a transformer voltage regulating switch, comprising

[0007] A bottom beam;

[0008] A two-way adjustment component fixedly arranged on the side wall of the bottom beam;

[0009] Two base components slidably sleeved at both ends of the bottom beam, and the base components are threadedly connected to the two-way adjustment component;

[0010] A first telescopic rod fixedly arranged on the top of one end of the base component, and the first telescopic rod is vertically arranged;

[0011] A hoisting component fixedly connected to the top end of the first telescopic rod at one end;

[0012] An auxiliary support component hinged to the top of the other end of the base component, and the auxiliary support component is used to support the other end of the hoisting component.

[0013] A maintenance hoisting tool for a transformer voltage regulating switch based on the present invention. The hoisting assembly includes a top rod, the top rod is horizontally arranged and one end thereof is fixedly connected to the top end of the first telescopic rod. The other end of the top rod corresponds to the auxiliary support assembly. A top sliding frame is slidably sleeved outside the top rod. A driving part is arranged at the top end of the top sliding frame, a hoisting part and an adjusting part are arranged at the bottom end of the top sliding frame, and the adjusting part is fixedly connected to the hoisting part.

[0014] A maintenance hoisting tool for a transformer voltage regulating switch based on the present invention. The driving part includes a second motor and a driving roller. The second motor is fixedly arranged in the middle of the top end of the top sliding frame. The output shaft of the second motor is fixedly connected with a driving sprocket. The driving roller is rotatably arranged inside the top sliding frame and is in rolling contact with the top end of the top rod. One end of the driving roller is fixedly connected with a driven sprocket, and the driven sprocket is in transmission connection with the driving sprocket through a chain.

[0015] A maintenance hoisting tool for a transformer voltage regulating switch based on the present invention. The hoisting part includes a second sleeve. The second sleeve is fixedly connected to the bottom end of the top sliding frame through two second fixing seats. Second sliding rods are respectively slidably arranged inside both ends of the second sleeve. One end of the second sliding rod located outside the second sleeve is fixedly connected with one end of a lifting rope, and the other end of the lifting rope is fixedly connected with a lifting ring. The top end of the adjusting part is fixedly connected to the second sleeve, and the adjusting end of the adjusting part is fixedly connected to one end of the second sliding rod close to the lifting rope.

[0016] A maintenance hoisting tool for a transformer voltage regulating switch based on the present invention. The adjusting part includes a fixing table. The fixing table is fixedly sleeved outside the second sleeve and the top end thereof is fixedly connected to the bottom end of the top sliding frame. A third motor is fixedly connected to the bottom end of the fixing table. One end of a vertically arranged lead screw is fixedly connected to the output shaft of the third motor, and a limiting block is fixedly connected to the other end of the lead screw. An adjusting nut is threadedly connected to the outer side wall of the lead screw. One ends of two inclined connecting rods are respectively rotatably connected to two opposite outer side walls of the adjusting nut, and the other ends of the inclined connecting rods are rotatably connected to a fixing block. The fixing block is fixedly sleeved on the second sliding rod.

[0017] A maintenance hoisting tool for a transformer voltage regulating switch based on the present invention. Hydraulic cylinders are respectively fixedly connected to both ends of the inner top wall of the top sliding frame, and the piston ends of the hydraulic cylinders are in contact with the top end of the top rod.

[0018] A maintenance hoisting tool for a transformer voltage regulating switch based on the present invention. The bidirectional adjustment assembly includes a first motor, which is fixedly connected to one end of the side wall of the bottom beam. One end of the output shaft of the first motor is fixedly connected to one end of a bidirectional lead screw, and the other end of the bidirectional lead screw is rotatably connected to a first fixed seat, which is fixedly connected to the other end of the side wall of the bottom beam. The two base assemblies are respectively threadedly connected to both ends of the bidirectional lead screw.

[0019] A maintenance hoisting tool for a transformer voltage regulating switch based on the present invention. The base assembly includes a bottom sliding frame, which is slidably sleeved outside the bottom beam. A connecting block is fixedly connected to one outer side wall of the bottom sliding frame, and the connecting block is threadedly connected to the bidirectional lead screw. A bottom rod is fixedly connected to the other outer side wall of the bottom sliding frame. The first telescopic rod is vertically fixedly connected to the top end of the bottom sliding frame, and the auxiliary support assembly is hinged to the top of the end of the bottom rod away from the bottom sliding frame.

[0020] A maintenance hoisting tool for a transformer voltage regulating switch based on the present invention. The auxiliary support assembly includes a second telescopic rod. The bottom end of the second telescopic rod is fixedly connected to two rotating shafts, and each rotating shaft is rotatably connected to a connecting plate, which is fixedly connected to the side wall of the bottom rod. One end of a third telescopic rod is rotatably connected to the outer side wall of the fixed end of the second telescopic rod through a second hinge shaft, and the other end of the third telescopic rod is rotatably connected to the bottom rod through a first hinge shaft.

[0021] A maintenance hoisting tool for a transformer voltage regulating switch based on the present invention. The top end of the second telescopic rod is fixedly connected to a first sliding rod, and a first sleeve is slidably sleeved outside the mutually approaching ends of the two first sliding rods.

[0022] Compared with the prior art, the present invention has the following advantages and technical effects:

[0023] Through the provided bidirectional adjustment assembly, the present invention can adjust the distance between the two base assemblies on the bottom beam, so that the hoisting tool can adapt to transformers of different lengths. The provided first telescopic rod and the auxiliary support assembly can work together to adjust the height of the hoisting assembly, so that the hoisting tool can adapt to transformers of different heights. The provided hoisting assembly can self-adjust its width dimension, so that the hoisting tool can adapt to transformers of different widths. Through the coordinated cooperation of the above components, the hoisting tool of the present invention can adapt to the hoisting work of transformers of various different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for use in the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings:

[0025] Figure 1 Schematic diagram of the whole of the present invention;

[0026] Figure 2 Schematic diagram of the hoisting assembly of the present invention;

[0027] Figure 3 Cross-sectional view of the hoisting assembly of the present invention.

[0028] Wherein, 1, bottom beam; 2, first motor; 3, bidirectional lead screw; 4, first fixed seat; 5, bottom sliding frame; 6, connecting block; 7, bottom rod; 8, first telescopic rod; 9, top rod; 10, top sliding frame; 11, traveling wheel; 12, universal wheel; 13, connecting plate; 14, second telescopic rod; 15, rotating shaft; 16, first sliding rod; 17, first sleeve; 18, third telescopic rod; 19, first hinge shaft; 20, second hinge shaft; 21, second motor; 22, driving sprocket; 23, chain; 24, driven sprocket; 25, second sleeve; 26, second fixed seat; 27, second sliding rod; 28, lifting rope; 29, lifting ring; 30, fixed table; 31, third motor; 32, lead screw; 33, limit block; 34, adjusting nut; 35, inclined connecting rod; 36, fixed block; 37, driving roller; 38, hydraulic cylinder. Specific embodiments

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0030] In electrical equipment and radio circuits, transformers are commonly used for stepping up or down voltages, matching impedances, safety isolation, etc. In a generator, whether the coil moves through the magnetic field or the magnetic field moves through the fixed coil, an electromotive force can be induced in the coil. In both cases, the value of the magnetic flux remains unchanged, but the number of magnetic fluxes linked to the coil changes, which is the principle of mutual induction. A transformer is a device that utilizes electromagnetic mutual induction to transform voltages, currents, and impedances.

[0031] The most basic form of a transformer consists of two sets of coils wound with wires and coupled to each other inductively. When an alternating current flows through one of the coils, an alternating voltage with the same frequency will be induced in the other coil, and the magnitude of the induced voltage depends on the degree of coupling and magnetic flux linkage between the two coils.

[0032] Generally, the coil connected to the AC power supply is called the primary coil; and the voltage across this coil is called the primary voltage. The induced voltage in the secondary coil may be greater or less than the primary voltage, which is determined by the turns ratio between the primary coil and the secondary coil. Therefore, transformers are divided into step-up and step-down transformers.

[0033] Most transformers have a fixed iron core around which the primary and secondary coils are wound. Due to the high magnetic permeability of iron, most of the magnetic flux is confined within the iron core. Therefore, a relatively high degree of magnetic coupling can be obtained between the two coils. In some transformers, the coils and the iron core are tightly combined, and the ratio of the primary and secondary voltages is almost the same as the turns ratio of the two coils. Therefore, the turns ratio of a transformer can generally be used as a reference index for stepping up or down the voltage of the transformer. Due to this function of stepping up and down the voltage, transformers have become an important accessory in modern power systems. Boosting the transmission voltage makes long-distance power transmission more economical. As for step-down transformers, they make the application of electricity more diversified. It can be said that without transformers, modern industry would not be able to reach its current state.

[0034] There are also transformers used for testing, called test transformers, which are divided into gas-filled, oil-immersed, dry-type and other test transformers. They are the basic test equipment for power plants, power supply bureaus and scientific research units and other users to conduct AC withstand voltage tests, and are used to conduct insulation strength tests on various electrical products, electrical components, insulating materials, etc. under specified voltages.

[0035] The main functions of transformers are: voltage transformation; current transformation, impedance transformation; isolation; voltage stabilization; autotransformers; high-voltage transformers, etc. The commonly used iron core shapes of transformers generally include E-shaped and C-shaped iron cores, XED-shaped, ED-shaped, CD-shaped.

[0036] Except for being smaller in size, there is no clear boundary between power transformers and electronic transformers. Generally, the power supplies for 60Hz power grids are very large. The power limitation of electronic devices is usually limited by the capabilities of rectification, amplification, and other components of the system. Some of these parts are for amplifying power, but compared with the power generation capacity of the power system, it still belongs to the range of small power.

[0037] Transformers are commonly used in various electronic equipment for the following reasons: to provide various voltage levels to ensure the normal operation of the system; to electrically isolate the parts operating at different potentials in the system; to provide a high impedance to alternating current but a low impedance to direct current; to maintain or modify the waveform and frequency response at different potentials. One of the important concepts of impedance, which is also one of the characteristics of electronics, is to preset a device. That is, when the impedance of a circuit component changes from one level to another, a device - a transformer - is used in between.

[0038] A voltage regulator is the opposite of a transformer. A transformer is a device that changes the alternating voltage, and its main components are the primary coil, the secondary coil, and the iron core.

[0039] Transformers are commonly used in electrical equipment and radio circuits for functions such as stepping up or down voltages, impedance matching, and safety isolation.

[0040] A voltage regulator consists of a voltage regulation circuit, a control circuit, and a servo motor, etc. When the input voltage or load changes, the control circuit samples, compares, and amplifies, and then drives the servo motor to rotate, changing the position of the carbon brush of the voltage regulator. By automatically adjusting the turns ratio of the coil, the output voltage is kept stable. Larger-capacity voltage regulators also work on the principle of voltage compensation.

[0041] The comprehensive protection for transformers is specifically used for the neutral point of power transformers to achieve two different operating modes: the neutral point of the transformer is grounded or not grounded; thus avoiding damage to the transformer caused by the increase in the neutral point voltage of the transformer due to system faults. This product is widely used in fields such as power, metallurgy, petrochemical, construction, and environmental protection.

[0042] The differential protection of a transformer is the main protection of the transformer and is installed according to the circulating current principle. It is mainly used to protect various phase-to-phase short-circuit faults occurring inside the windings of a two-winding or three-winding transformer and its leads, and can also be used to protect the single-phase turn-to-turn short-circuit faults of the transformer. Current transformers are installed on both sides of the winding transformer, and their secondary sides are connected according to the circulating current method. That is, if the same-polarity terminals of the two current transformers face the bus side, the same-polarity terminals are connected, and a current relay is connected in parallel between the two connections. The current flowing through the relay coil is the difference between the secondary currents of the two current transformers. That is to say, the differential relay is connected to the differential circuit. Theoretically, the current in the differential circuit is zero during normal operation and external faults. The scope of the transformer differential protection is the electrical equipment between the current transformers that constitute the transformer differential protection and the wires connecting these devices. Since the differential protection does not operate for faults outside the protection area, the differential protection does not need to cooperate with the protection of adjacent components outside the protection area in terms of the operating value and operating time limit. Therefore, it can act instantaneously during internal faults.

[0043] The transformer protection device is a high-tech product of electric power automation integrating multiple functions such as protection, monitoring, control, and communication, and is an ideal electrical unit for constructing an intelligent switch cabinet. The product is built-in with a protection library composed of more than twenty standard protection programs and has a complete and powerful acquisition function for analog quantities and switch quantities of primary equipment voltage and current.

[0044] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0045] Embodiment 1:

[0046] Refer to Figures 1 to 3 As shown, this embodiment provides a lifting tool for overhauling a transformer voltage regulating switch, including

[0047] Bottom beam 1;

[0048] A two-way adjustment component, fixedly arranged on the side wall of the bottom beam 1;

[0049] Two base components, slidably sleeved at both ends of the bottom beam 1, and the base components are threadedly connected to the two-way adjustment component;

[0050] The first telescopic rod 8, fixedly arranged at the top of one end of the base component, and the first telescopic rod 8 is vertically arranged;

[0051] A lifting component, one end of which is fixedly connected to the top end of the first telescopic rod 8;

[0052] An auxiliary support component, hinged at the top of the other end of the base component, and the auxiliary support component is used to support the other end of the lifting component.

[0053] In this embodiment, by setting the two-way adjustment component, the distance between the two base components on the bottom beam 1 can be adjusted, so that the lifting tool can adapt to transformers of different lengths. The first telescopic rod 8 and the auxiliary support component are arranged to work together to adjust the height of the lifting component, so that the lifting tool can adapt to transformers of different heights. The lifting component is arranged to self-adjust its own width dimension, so that the lifting tool can adapt to transformers of different widths. Through the coordinated cooperation of the above components, the lifting tool in this embodiment can adapt to the lifting work of transformers of various different sizes.

[0054] Furthermore, the lifting component includes a top rod 9, the top rod 9 is horizontally arranged and one end is fixedly connected to the top end of the first telescopic rod 8, the other end of the top rod 9 corresponds to the auxiliary support component, a top sliding frame 10 is slidably sleeved on the outside of the top rod 9, a driving part is arranged at the top end of the top sliding frame 10, a lifting part and an adjusting part are arranged at the bottom end of the top sliding frame 10, and the adjusting part is fixedly connected to the lifting part.

[0055] Furthermore, the driving part includes a second motor 21 and a driving roller 37. The second motor 21 is fixedly arranged in the middle of the top of the top sliding frame 10. The output shaft of the second motor 21 is fixedly connected with a driving sprocket 22. The driving roller 37 is rotatably arranged inside the top sliding frame 10 and is in rolling contact with the top end of the top rod 9. One end of the driving roller 37 is fixedly connected with a driven sprocket 24. The driven sprocket 24 is in transmission connection with the driving sprocket 22 through a chain 23.

[0056] When the second motor 21 works, it drives the driving sprocket 22 to rotate. The driving sprocket 22 drives the driven sprocket 24 to rotate through the chain 23 and further makes the driving roller 37 rotate. Since the driving roller 37 is in rolling contact with the top end of the top rod 9, the top sliding frame 10 can be driven to move repeatedly on the top rod 9 during the rotation of the driving roller 37.

[0057] Furthermore, the hoisting part includes a second sleeve 25. The second sleeve 25 is fixedly connected with the bottom end of the top sliding frame 10 through two second fixing seats 26. Second sliding rods 27 are respectively arranged in a sliding manner at both ends inside the second sleeve 25. One end of the second sliding rod 27 located outside the second sleeve 25 is fixedly connected with one end of a lifting rope 28. The other end of the lifting rope 28 is fixedly connected with a lifting ring 29. The top end of the adjusting part is fixedly connected with the second sleeve 25, and the adjusting end of the adjusting part is fixedly connected with one end of the second sliding rod 27 close to the lifting rope 28.

[0058] Furthermore, the adjusting part includes a fixing platform 30. The fixing platform 30 is fixedly sleeved outside the second sleeve 25 and its top end is fixedly connected with the bottom end of the top sliding frame 10. The bottom end of the fixing platform 30 is fixedly connected with a third motor 31. One end of a vertically arranged lead screw 32 is fixedly connected with the output shaft of the third motor 31. The other end of the lead screw 32 is fixedly connected with a limit block 33. An adjusting nut 34 is threadedly connected to the outer side wall of the lead screw 32. One ends of two inclined connecting rods 35 are respectively rotatably connected to two opposite outer side walls of the adjusting nut 34. The other ends of the inclined connecting rods 35 are rotatably connected with a fixing block 36. The fixing block 36 is fixedly sleeved on the second sliding rod 27.

[0059] When hoisting the transformer, first adjust the distance between the two lifting rings 29 according to the width dimension of the transformer. During the adjustment, the third motor 31 works to drive the lead screw 32 to rotate. Since the adjusting nut 34 is threadedly connected to the outer side wall of the lead screw 32 and is fixedly connected with the end of the second sliding rod 27 through the inclined connecting rods 35 and the fixing block 36, the height adjustment of the adjusting nut 34 can be realized during the rotation of the lead screw 32. After the height of the adjusting nut 34 changes, the second sliding rod 27 can be pushed to slide out or into the second sleeve 25 through the inclined connecting rod 35 hinged to it, and finally the adjustment of the distance between the two lifting rings 29 is realized.

[0060] Furthermore, hydraulic cylinders 38 are respectively fixedly connected to both ends of the inner top wall of the top sliding frame 10. The piston ends of the hydraulic cylinders 38 are in contact with the top ends of the top rods 9.

[0061] During the process of the top sliding frame 10 sliding on the top rod 9, the piston end of the hydraulic cylinder 38 is in a contracted state and contacts the top end of the top rod 9. When starting to hoist the transformer, the piston end of the hydraulic cylinder 38 is in an extended state and contacts the top end of the top rod 9, so that the driving roller 37 and the top end of the top rod 9 are in a non-loaded contact state, preventing the gravity of the transformer from acting on the driving roller 37 and shortening the service life of the driving roller 37.

[0062] Furthermore, the two-way adjustment assembly includes a first motor 2, the first motor 2 is fixedly connected to one end of the side wall of the bottom beam 1, one end of the output shaft of the first motor 2 is fixedly connected to one end of a two-way lead screw 3, the other end of the two-way lead screw 3 is rotatably connected to a first fixing seat 4, and the first fixing seat 4 is fixedly connected to the other end of the side wall of the bottom beam 1. The two base assemblies are respectively threadedly connected to both ends of the two-way lead screw 3.

[0063] The thread directions at both ends of the two-way lead screw 3 are opposite. During the process of the first motor 2 driving the two-way lead screw 3 to rotate in one direction, the two base assemblies can be moved closer to or away from each other, so as to be able to adapt to transformers of different lengths.

[0064] Furthermore, the base assembly includes a bottom sliding frame 5, the bottom sliding frame 5 is slidably sleeved outside the bottom beam 1, a connecting block 6 is fixedly connected to one outer side wall of the bottom sliding frame 5, the connecting block 6 is threadedly connected to the two-way lead screw 3, a bottom rod 7 is fixedly connected to the other outer side wall of the bottom sliding frame 5, a first telescopic rod 8 is vertically fixedly connected to the top end of the bottom sliding frame 5, and the auxiliary support assembly is hinged to the top of the end of the bottom rod 7 away from the bottom sliding frame 5.

[0065] Furthermore, the auxiliary support assembly includes a second telescopic rod 14, two rotating shafts 15 are fixedly connected to the bottom end of the second telescopic rod 14, each rotating shaft 15 is rotatably connected to a connecting plate 13, the connecting plate 13 is fixedly connected to the side wall of the bottom rod 7, one end of a third telescopic rod 18 is rotatably connected to the outer side wall of the fixed end of the second telescopic rod 14 through a second hinge shaft 20, and the other end of the third telescopic rod 18 is rotatably connected to the bottom rod 7 through a first hinge shaft 19.

[0066] When the transformer does not need to be hoisted, the third telescopic rod 18 is in a contracted state and the second telescopic rod 14 is obliquely stored at the top end of the bottom rod 7. At this time, the gravity of the top rod 9 and all the components arranged on the top rod 9 is small. Therefore, only by fixing one end of the top rod 9 on the first telescopic rod 8, the stable support of all the components on the top rod 9 can be realized. When starting to hoist the transformer, the third telescopic rod 18 extends to make the second telescopic rod 14 in a vertical state, and the second telescopic rod 14 cooperates with the first telescopic rod 8 to jointly support the top rod 9 and all the components arranged on the top rod 9.

[0067] Furthermore, a first sliding rod 16 is fixedly connected to the top end of the second telescopic rod 14 , and a first sleeve 17 is slidably sleeved on the outer sides of the two first sliding rods 16 that are close to each other.

[0068] The first sliding rod 16 and the first sleeve 17 can improve the integrity between the two second telescopic rods 14 .

[0069] Furthermore, walking wheels 11 are respectively provided at the bottom of both ends of the bottom beam 1, and universal wheels 12 are respectively provided at the bottom of the bottom rod 7 away from the bottom beam 1. The universal wheels 12 are convenient for adjusting the distance between the two bottom rods 7, and the cooperation of the universal wheels 12 and the walking wheels 11 facilitates the movement of the entire lifting tool.

[0070] The working process of this embodiment is as follows:

[0071] First, the device is moved to the vicinity of the transformer to be hoisted by the universal wheel 12 and the running wheel 11. At this time, the second telescopic rod 14 is in a tilted storage state. The distance between the two bottom rods 7 is adjusted according to the length of the transformer to be hoisted. Then, the extension length of the telescopic end of the first telescopic rod 8 is adjusted according to the height of the height position of the transformer. Then, the top rod 9 and all components on the top rod 9 are moved to the top of the transformer by the universal wheel 12 and the running wheel 11. Then, the third telescopic rod 18 is controlled to extend to adjust the second telescopic rod 14 to a vertical state. The telescopic end of the second telescopic rod 14 is extended to support the suspended end of the top rod 9. Then, the top sliding frame 10 is moved to the top of the transformer by the second motor 21 and the driving roller 37. Then, the distance between the two lifting rings 29 is adjusted according to the width of the transformer. At this point, the entire device is adjusted. Then, the lifting ring 29 is fixed to the lifting ear of the transformer, and the transformer can be hoisted.

[0072] Embodiment 2:

[0073] The difference between this embodiment and the first embodiment is that the position where the walking wheel 11 is installed on the bottom beam 1 and the position where the universal wheel 12 is installed on the bottom rod 7 are fixedly connected with retractable pile legs. During the movement of the entire lifting tool, the pile legs are in a retracted state without affecting the movement. When the transformer needs to be lifted, the pile legs are extended to support the entire lifting tool to prevent the walking wheel 11 and the universal wheel 12 from being crushed during the lifting of the transformer.

[0074] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0075] The embodiments described above are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope of the present invention.

Claims

1. A maintenance hoisting tool for a transformer voltage regulating switch, characterized in that, including a bottom beam (1); a bidirectional adjustment component fixedly arranged on the side wall of the bottom beam (1); two base components slidably sleeved at both ends of the bottom beam (1), and the base components are in threaded connection with the bidirectional adjustment component; a first telescopic rod (8) fixedly arranged at the top of one end of the base component, and the first telescopic rod (8) is vertically arranged; a hoisting component, one end of which is fixedly connected to the top end of the first telescopic rod (8); an auxiliary support component hinged to the top of the other end of the base component, and the auxiliary support component is used to support the other end of the hoisting component.

2. The overhaul hoisting tool for a transformer voltage regulating switch according to claim 1, wherein, The hoisting component includes a top rod (9), the top rod (9) is horizontally arranged and one end thereof is fixedly connected to the top end of the first telescopic rod (8), the other end of the top rod (9) corresponds to the auxiliary support component, a top sliding frame (10) is slidably sleeved on the outer side of the top rod (9), a driving part is arranged at the top end of the top sliding frame (10), a hoisting part and an adjusting part are arranged at the bottom end of the top sliding frame (10), and the adjusting part is fixedly connected to the hoisting part.

3. The overhaul lifting tool for a transformer voltage regulating switch according to claim 2, characterized in that, The driving part includes a second motor (21) and a driving roller (37), the second motor (21) is fixedly arranged in the middle of the top end of the top sliding frame (10), a driving sprocket (22) is fixedly connected to the output shaft of the second motor (21), the driving roller (37) is rotatably arranged inside the top sliding frame (10) and is in rolling contact with the top end of the top rod (9), a driven sprocket (24) is fixedly connected to one end of the driving roller (37), and the driven sprocket (24) is in transmission connection with the driving sprocket (22) through a chain (23).

4. The overhaul hoisting tool for a transformer voltage regulating switch according to claim 2, characterized in that, The hoisting part includes a second sleeve (25), the second sleeve (25) is fixedly connected to the bottom end of the top sliding frame (10) through two second fixing seats (26), second sliding rods (27) are respectively slidably arranged inside both ends of the second sleeve (25), one end of the second sliding rod (27) located outside the second sleeve (25) is fixedly connected to one end of a suspension rope (28), the other end of the suspension rope (28) is fixedly connected to a suspension ring (29), the top end of the adjusting part is fixedly connected to the second sleeve (25), and the adjusting end of the adjusting part is fixedly connected to the end of the second sliding rod (27) close to the suspension rope (28).

5. The overhaul hoisting tool for a transformer voltage regulating switch according to claim 4, characterized in that, The adjusting part includes a fixing table (30), the fixing table (30) is fixedly sleeved on the outer side of the second sleeve (25) and the top end thereof is fixedly connected to the bottom end of the top sliding frame (10), a third motor (31) is fixedly connected to the bottom end of the fixing table (30), one end of a lead screw (32) vertically arranged is fixedly connected to the output shaft of the third motor (31), a limiting block (33) is fixedly connected to the other end of the lead screw (32), an adjusting nut (34) is in threaded connection with the outer side wall of the lead screw (32), one ends of inclined connecting rods (35) are respectively rotatably connected to two opposite outer side walls of the adjusting nut (34), the other ends of the inclined connecting rods (35) are rotatably connected to a fixing block (36), and the fixing block (36) is fixedly sleeved on the second sliding rod (27).

6. The overhaul hoisting tool for a transformer voltage regulating switch according to claim 2, characterized in that, At both ends of the inner top wall of the top sliding frame (10), hydraulic cylinders (38) are respectively fixedly connected, and the piston ends of the hydraulic cylinders (38) are in contact with the top ends of the top rods (9).

7. The overhaul lifting tool for a transformer voltage regulating switch according to claim 1, characterized in that, The bidirectional adjustment assembly includes a first motor (2), the first motor (2) is fixedly connected to one end of the side wall of the bottom beam (1), one end of a bidirectional lead screw (3) is fixedly connected to the output shaft of the first motor (2), the other end of the bidirectional lead screw (3) is rotatably connected to a first fixed seat (4), the first fixed seat (4) is fixedly connected to the other end of the side wall of the bottom beam (1), and the two base assemblies are respectively threadedly connected to both ends of the bidirectional lead screw (3).

8. The overhaul hoisting tool for a transformer voltage regulating switch according to claim 7, characterized in that, The base assembly includes a bottom sliding frame (5), the bottom sliding frame (5) is slidably sleeved outside the bottom beam (1), a connecting block (6) is fixedly connected to one outer side wall of the bottom sliding frame (5), the connecting block (6) is threadedly connected to the bidirectional lead screw (3), a bottom rod (7) is fixedly connected to the other outer side wall of the bottom sliding frame (5), a first telescopic rod (8) is vertically fixedly connected to the top end of the bottom sliding frame (5), and the auxiliary support assembly is hinged to the top of the end of the bottom rod (7) far from the bottom sliding frame (5).

9. The overhaul hoisting tool for a transformer voltage regulating switch according to claim 8, wherein, The auxiliary support assembly includes a second telescopic rod (14), two rotating shafts (15) are fixedly connected to the bottom end of the second telescopic rod (14), each rotating shaft (15) is rotatably connected to a connecting plate (13), the connecting plate (13) is fixedly connected to the side wall of the bottom rod (7), one end of a third telescopic rod (18) is rotatably connected to the outer side wall of the fixed end of the second telescopic rod (14) through a second hinge shaft (20), and the other end of the third telescopic rod (18) is rotatably connected to the bottom rod (7) through a first hinge shaft (19).

10. The overhaul hoisting tool for a transformer voltage regulating switch according to claim 9, characterized in that, A first sliding rod (16) is fixedly connected to the top end of the second telescopic rod (14), and a first sleeve (17) is slidably sleeved outside the mutually approaching ends of the two first sliding rods (16).

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