Stepless lifting device for high-voltage end of test transformer

Abstract

The utility model discloses a stepless lifting device for a high-voltage end of a test transformer, which relates to the technical field of lifting devices for the high-voltage end of the test transformer, and comprises a plurality of lifting rods which are sleeved together, and the tail end of the outermost lifting rod is connected with a test transformer body. The top end of the innermost lifting rod is connected with the high-voltage end of a test transformer, one of any two adjacent lifting rods is an inner rod, the other one is an outer rod arranged outside the inner rod in a sleeving mode, a damping sleeve is arranged at the tail end of the inner rod, the damping sleeve is attached to the inner wall of the outer rod, and a locking assembly is arranged between the inner rod and the outer rod. The locking assembly comprises an axial deviation taper sleeve and a threaded sleeve rotary knob, the axial deviation taper sleeve is movably arranged on the inner rod in a sleeving mode, and the threaded sleeve rotary knob is movably arranged on the axial deviation taper sleeve in a sleeving mode. And the requirement of test field insulation distance is met.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting devices for the high-voltage end of test transformers, and specifically relates to a stepless lifting device for the high-voltage end of a test transformer. Background Technique

[0002] A high-voltage transformer is a transformer for special purposes. It uses the principle of electromagnetic induction to boost low voltage to high voltage. This transformer consists of an iron core and primary and secondary windings wound around the iron core. During testing, the high-voltage transformer needs to be lifted to a specific height and fixedly installed on the corresponding test equipment for high-voltage testing and performance evaluation.

[0003] The patent with the publication number CN219792363U discloses a lifting device for high-voltage transformer testing with strong stability, which includes an installation box. A moving wheel is arranged at the bottom of the installation box, a support column is fixedly installed inside the bottom of the installation box, a lifting adjustment mechanism is arranged outside the support column, and auxiliary support mechanisms are arranged on the left and right sides of the installation box. Through the arranged lifting adjustment mechanism, during use, through the arranged limit component, the high-voltage transformer can be stably fixed on the top of the sliding frame, thereby preventing the transformer from moving during lifting. The first screw rod is driven to rotate by a bidirectional motor, so that the first screw rod drives the sliding frame to slide and lift outside the four support columns, improving the stability of the sliding frame during lifting and preventing the device from shaking when the high-voltage transformer rises to a certain height.

[0004] Technologies such as those in the above-mentioned patent solve the problem of transformer height adjustment and achieve stepless height adjustment. However, the electric platform is large in weight and volume and requires a power supply. Although stability and safety issues are considered, the test efficiency is reduced instead. Content of the Utility Model

[0005] The purpose of the utility model is to provide a stepless lifting device for the high-voltage end of a test transformer to solve the deficiencies in the above-mentioned prior art.

[0006] To achieve the above object, the present utility model provides the following technical solution: A stepless lifting device for the high-voltage end of a test transformer, which includes a plurality of lifting rods sleeved together. The end of the outermost lifting rod is connected to the test transformer body, and the top of the innermost lifting rod is connected to the high-voltage end of the test transformer. One of any two adjacent lifting rods is an inner rod, and the other is an outer rod sleeved outside the inner rod. A damping sleeve is provided at the end of the inner rod, and the damping sleeve fits against the inner wall of the outer rod. A locking assembly is provided between the inner rod and the outer rod. The locking assembly includes an axial deviation taper sleeve and a screw sleeve knob. The axial deviation taper sleeve is movably sleeved on the inner rod, and the screw sleeve knob is movably sleeved on the axial deviation taper sleeve. When the inner rod and the outer rod are locked, one end of the screw sleeve knob abuts against the end of the axial deviation taper sleeve, and the other end is screwed to the outer rod. The tapered surface of the axial deviation taper sleeve abuts against the outside of the outer rod.

[0007] Further, the number of lifting rods is three, including a first lifting rod, a second lifting rod, and a third lifting rod, and the number of locking assemblies is two.

[0008] Further, a limit card is provided on the outer rod of two adjacent lifting rods, and an external thread adapted to the internal thread on the inner wall of the screw sleeve knob is provided on the circumferential side of the limit card.

[0009] Further, a multi-interface conversion device is provided at the top of the innermost lifting rod, and the multi-interface conversion device is used to connect the grading shield.

[0010] Further, the connection mode between the end of the outermost lifting rod and the test transformer body is a fixed connection or a movable connection.

[0011] Compared with the prior art, the stepless lifting device for the high-voltage end of a test transformer provided by the present utility model does not need to lift the whole test transformer. Only a simple and firm device is needed to lift the high-voltage end of the test transformer, which can meet the requirement of the insulation distance at the test site. At the same time, the problem of top-heavy and bottom-light can also be solved, thereby reducing the working intensity of the test personnel and improving the safety of the AC withstand voltage test. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings.

[0013] Figure 1 Structural schematic provided for the embodiment of the present utility model Figure Ⅰ ;

[0014] Figure 2Structural schematic provided by embodiments of the present utility model Figure Ⅱ ;

[0015] Figure 3 Structural schematic provided by embodiments of the present utility model Figure Ⅲ ;

[0016] Figure 4 Structural schematic provided by embodiments of the present utility model Figure Ⅳ .

[0017] Description of reference numerals:

[0018] 1. First lifting rod; 2. Second lifting rod; 3. Third lifting rod; 4. Limit clamp; 5. Damping sleeve; 6. Axial deviation taper sleeve; 7. Screwed sleeve knob; 8. Test transformer box body; 9. High voltage end; 10. Multi-interface conversion device; 11. Equalizing cover. Specific implementation manners

[0019] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0020] Please refer to Figures 1-4 , a stepless lifting device for the high voltage end of a test transformer provided by embodiments of the present utility model includes a plurality of lifting rods sleeved together, the number of the lifting rods is three, including a first lifting rod 1, a second lifting rod 2 and a third lifting rod 3. The end of the outermost lifting rod is connected to the test transformer body, that is, the bottom end of the first lifting rod 1 is fixedly connected to the test transformer box body 8, such as by screwing or welding.

[0021] Please refer to Figure 1 , the top end of the innermost lifting rod is connected to the high voltage end 9 of the test transformer. A multi-interface conversion device 10 is provided on the top of the high voltage end 9. The high voltage end 9 is connected to the equalizing cover 11 through the multi-interface conversion device 10. A plurality of transfer interfaces with different rod diameters are opened on the multi-interface conversion device 10. These transfer interfaces with different rod diameters can adapt to the connecting screws of different specifications of different equalizing covers 11, thereby improving the universality of the embodiments of the present utility model.

[0022] Please refer to Figure 2 , one of any two adjacent lifting rods is an inner rod, and the other is an outer rod sleeved outside the inner rod. A damping sleeve 5 is provided at the end of the inner rod. The damping sleeve 5 is attached to the inner wall of the outer rod. In the embodiments of the present utility model, damping sleeves 5 are provided at the ends of the second lifting rod 2 and the third lifting rod 3. The provided damping sleeves 5 can limit the free up and down movement of the inner rod in the two adjacent lifting rods relative to the outer rod, and reduce the operation difficulty of using and operating the stepless lifting device for the high voltage end of the test transformer.

[0023] Please refer toFigures 3-4 , a locking component is arranged between the inner rod and the outer rod of two adjacent lifting rods. The number of the locking components is two, which are respectively sleeved on the second lifting rod 2 and the third lifting rod 3. The locking component includes an axial deviation taper sleeve 6 and a screw sleeve knob 7. The axial deviation taper sleeve 6 is movably sleeved on the inner rod, and the screw sleeve knob 7 is movably sleeved on the axial deviation taper sleeve 6. The inner conical surface angles of the axial deviation taper sleeve 6 are different. When the axial deviation taper sleeve 6 is slid to the position to be locked, the axial deviation taper sleeve 6 will cause an axis offset between the inner rod and the outer rod of the adjacent lifting rods to form a mechanical lock. After locking, the screw sleeve knob 7 is screwed with the outer rod to fix the axial deviation taper sleeve 6 and achieve stepless locking.

[0024] Please refer to Figure 3 , a limit card 4 is arranged on the outer rod of two adjacent lifting rods, that is, a limit card 4 is arranged at the upper ends of the first lifting rod 1 and the second lifting rod 2. An external thread adapted to the internal thread on the inner wall of the screw sleeve knob 7 is arranged on the circumferential side of the limit card 4. When the inner rod and the outer rod are locked, one end of the screw sleeve knob 7 abuts against the end of the axial deviation taper sleeve 6, and the other end is screwed with the limit card 4 at the top of the outer rod. The conical surface of the axial deviation taper sleeve 6 abuts against the outer side of the outer rod.

[0025] The limit card 4 on the first lifting rod 1 in the embodiment of the present utility model has multiple effects. One is to be screwed with the screw sleeve knob 7 to fix the axial deviation taper sleeve 6, and the other is to prevent the second lifting rod 2 from completely sliding into the first lifting rod 1. The limit card 4 on the second lifting rod 2 also has multiple effects. One is to be screwed with the screw sleeve knob 7 to fix the axial deviation taper sleeve 6, the other is to prevent the third lifting rod 3 from completely sliding into the second lifting rod 2, and the other is to prevent the locking component on the second lifting rod 2 from sliding upward onto the third lifting rod 3.

[0026] Working principle: One of any two adjacent lifting rods is an inner rod, and the other is an outer rod sleeved outside the inner rod. A locking component is arranged between the inner rod and the outer rod. The locking component includes an axial deviation taper sleeve 6 and a screw sleeve knob 7. The axial deviation taper sleeve 6 is movably sleeved on the inner rod, and the screw sleeve knob 7 is movably sleeved on the axial deviation taper sleeve 6. The inner conical surface angles of the axial deviation taper sleeve 6 are different. When the axial deviation taper sleeve 6 is slid to the position to be locked, the axial deviation taper sleeve 6 will cause an axis offset between the inner rod and the outer rod of the adjacent lifting rods to form a mechanical lock. After locking, one end of the screw sleeve knob 7 abuts against the end of the axial deviation taper sleeve 6, and the other end is screwed with the limit card 4 at the top of the outer rod, so as to fix the axial deviation taper sleeve 6 and achieve stepless adjustment and locking between two adjacent lifting rods.

[0027] In addition, in other embodiments provided by the present utility model, the connection mode between the end of the outermost lifting rod and the test transformer body can also be replaced with a movable connection. Specifically, the end of the outermost lifting rod is rotatably connected to the test transformer body. A rotating shaft is rotatably provided on the test transformer box 8, and the bottom of the first lifting rod 1 is fixedly connected to the rotating shaft, so that the stepless lifting device at the high-voltage end of the test transformer can achieve angle adjustment; alternatively, the end of the outermost lifting rod is slidably connected to the test transformer body. A slide rail is fixedly provided on the test transformer box 8, and the slider at the bottom of the first lifting rod 1 is slidably connected to the slide rail, so that the stepless lifting device at the high-voltage end of the test transformer can slide on the test transformer box 8 to change its position, thereby broadening the spatial range of the high-voltage end 9 of the test transformer and having a certain effect of avoiding obstacles.

[0028] Only some exemplary embodiments of the present utility model have been described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present utility model. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present utility model.

Claims

1. A stepless lifting device for the high-voltage end of a test transformer, characterized in that, It includes a plurality of lifting rods sleeved with each other. The end of the outermost lifting rod is connected to the test transformer body, and the top of the innermost lifting rod is connected to the high-voltage end (9) of the test transformer. One of any two adjacent lifting rods is an inner rod, and the other is an outer rod sleeved outside the inner rod. A damping sleeve (5) is provided at the end of the inner rod. The damping sleeve (5) fits against the inner wall of the outer rod. A locking assembly is provided between the inner rod and the outer rod. The locking assembly includes an axial deviation taper sleeve (6) and a screw sleeve knob (7). The axial deviation taper sleeve (6) is movably sleeved on the inner rod, and the screw sleeve knob (7) is movably sleeved on the axial deviation taper sleeve (6). When the inner rod and the outer rod are locked, one end of the screw sleeve knob (7) abuts against the end of the axial deviation taper sleeve (6), and the other end is screwed to the outer rod. The tapered surface of the axial deviation taper sleeve (6) abuts against the outside of the outer rod.

2. The stepless lifting device for the high-voltage end of a test transformer according to claim 1, wherein The number of the lifting rods is three, and the number of the locking assemblies is two.

3. The stepless lifting device for the high-voltage end of a test transformer according to claim 1, characterized in that, A limit card (4) is provided on the outer rod of two adjacent lifting rods. The outer circumference of the limit card (4) is provided with an external thread adapted to the internal thread on the inner wall of the screw sleeve knob (7).

4. A stepless lifting device for the high-voltage end of a test transformer according to claim 1, characterized in that, A multi-interface conversion device (10) is provided at the top of the innermost lifting rod. The multi-interface conversion device (10) is used to connect the grading shield (11).

5. A stepless lifting device for the high-voltage end of a test transformer according to claim 1, characterized in that, The connection mode between the end of the outermost lifting rod and the test transformer body is a fixed connection or a movable connection.

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