Special handcart for disassembling and assembling current transformer

Abstract

The special handcart comprises a chassis, a height adjusting mechanism and an angle adjusting mechanism, walking wheels are installed at the lower end of the chassis, a sleeve is rotatably installed at the upper end of the chassis, a stand column is installed in the sleeve in a sliding mode, an installation frame is fixed at the top end of the stand column, a supporting arm is hinged to the installation frame, and a tray is movably arranged on the supporting arm. The current transformer is placed on the tray, and the current transformer can be conveniently moved to the high-voltage cabinet through the walking wheels; the height of the corbel is adjusted up and down through the height adjusting mechanism; the horizontal position of the tray is adjusted by rotating the sleeve, the tray is pushed to move on the supporting arm, and the angle of the supporting arm is finely adjusted through the angle adjusting mechanism, so that a mounting screw hole of the current transformer is accurately butted with a screw hole of a high-voltage cabinet mounting point, and the device is suitable for mounting and replacing a large transformer of a high-voltage power distribution cabinet. The device has the advantages of being convenient to operate, safe, reliable, labor-saving, convenient to maintain and construct and capable of saving maintenance time.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage switch cabinet auxiliary tools, in particular to a special handcart for disassembling and assembling current transformers. Background Art

[0002] The KYN28-12 armored center-mounted metal-enclosed switchgear is divided into four compartments on three upper and lower levels: busbar compartment, instrument compartment, circuit breaker compartment, and cable compartment. The space inside the lowest cable compartment is approximately 800*800*800mm, which is relatively narrow. In addition, lightning arresters, grounding switches, cable connection bars, current transformers and other components are installed in the compartment. The current transformer weighs about 50kg and is installed on the top of the compartment. Due to the limited space in the compartment and the heavy transformer, personnel cannot enter the compartment to lift the transformer for installation or replacement, which causes great difficulties for inspection, maintenance and installation. Utility Model Content

[0003] Based on this, it is necessary to provide a special trolley for disassembling and assembling current transformers in response to the above technical problems.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a special trolley for disassembling and assembling a current transformer, comprising a chassis, wherein a walking wheel is installed at the lower end of the chassis, a sleeve is rotatably installed at the upper end of the chassis, a column is slidably installed in the sleeve, a mounting frame is fixed to the top of the column, a support arm is hinged on the mounting frame, and a tray that can move along the length direction of the support arm is movably provided on the support arm; the utility model also includes a height adjustment mechanism and an angle adjustment mechanism, the height adjustment mechanism is connected to the mounting frame and the sleeve for adjusting the height of the mounting frame, and the angle adjustment mechanism is connected to the mounting frame and the support arm for adjusting the inclination angle of the support arm.

[0005] Preferably, the height adjustment mechanism includes a first screw, a nut, and a fixing plate, the nut is fixedly connected to the mounting frame, the fixing plate is fixedly connected to the sleeve, the first screw is rotatably mounted on the fixing plate, and the first screw is threadedly connected to the nut.

[0006] Preferably, a rotary handle is installed at the upper end or the lower end of the first screw.

[0007] Preferably, a first bearing is fixed on the fixed plate, and the first screw is rotatably mounted on the fixed plate via the first bearing.

[0008] Preferably, the angle adjustment mechanism includes a second screw, an internally threaded sleeve and a handle, the handle is fixedly mounted on the internally threaded sleeve, two sections of internal threads with opposite rotation directions are provided in the internally threaded sleeve, the internal threads of the internally threaded sleeve are connected to two second screws, one of the second screws is hinged to the support arm, and the other second screw is hinged to the mounting frame.

[0009] Preferably, an ear seat is fixed to one end of the second screw away from the internal threaded sleeve, and a hinge seat corresponding to the second screw is fixed to the support arm and the mounting frame, and the ear seat is hinged to the corresponding hinge seat through a first pin shaft.

[0010] Preferably, a slide groove is provided on the supporting arm, and a roller is fixed to the bottom of the tray, and the roller is rollingly connected to the slide groove.

[0011] Preferably, the support arm is hinged to the mounting frame via a second pin.

[0012] Preferably, a second bearing is fixed on the chassis, and the sleeve is rotatably mounted on the chassis via the first bearing.

[0013] Preferably, a transverse channel steel and a longitudinal channel steel are fixed on the lower end surface of the chassis, the longitudinal channel steels are located on both sides of the transverse channel steel, and the longitudinal channel steels are fixedly connected to the transverse channel steels.

[0014] Compared with the prior art, the present technical solution has at least one of the following beneficial effects: by placing the current transformer on the tray, the current transformer can be easily moved to the high-voltage cabinet through the walking wheels; according to the installation height, the height of the support arm can be adjusted up and down by the height adjustment mechanism; according to the installation position, the horizontal position of the tray can be adjusted by rotating the sleeve, and by pushing the tray to move on the support arm, the angle of the support arm can be fine-tuned by the angle adjustment mechanism, so that the installation thread holes of the current transformer and the thread holes of the high-voltage cabinet installation points are finally accurately connected. It is suitable for the installation and replacement of large transformers in high-voltage distribution cabinets, and has the advantages of easy operation, safety and reliability, saving manpower, facilitating maintenance and construction, and saving maintenance time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A three-dimensional diagram of a special trolley for disassembling and assembling a current transformer according to an embodiment of the present invention Figure 1 ;

[0016] Figure 2 A three-dimensional diagram of a special trolley for disassembling and assembling a current transformer according to an embodiment of the present invention Figure 2 ;

[0017] Figure 3 This is a front view of a special trolley for disassembling and assembling a current transformer according to an embodiment;

[0018] Figure 4 This is a right side view of a special trolley for disassembling and assembling a current transformer according to an embodiment;

[0019] Figure 5 This is a diagram showing the use of a special trolley for disassembling and assembling a current transformer according to an embodiment;

[0020] In the figure, 1. chassis; 2. walking wheel; 3. sleeve; 4. column; 5. mounting frame; 6. support arm; 7. tray; 8. height adjustment mechanism; 9. angle adjustment mechanism; 10. first screw; 11. nut; 12. fixing plate; 13. rotary handle; 14. first bearing; 15. second screw; 16. internal threaded sleeve; 17. handle; 18. ear seat; 19. hinge seat; 20. first pin; 21. slide groove; 22. roller; 23. second pin; 24. second bearing; 25. transverse channel steel; 26. longitudinal channel steel. DETAILED DESCRIPTION

[0021] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0022] See also Figures 1 to 5 The embodiment of the present application provides a special trolley for disassembling and assembling a current transformer, including a chassis 1, a walking wheel 2 is installed at the lower end of the chassis 1, and the walking wheel 2 is an anti-static Forma wheel. A sleeve 3 is rotatably installed at the upper end of the chassis 1. Specifically, a second bearing 24 is fixed on the chassis 1, and the second bearing 24 is a tapered roller bearing. The sleeve 3 is rotatably installed on the chassis 1 through the second bearing 24; a column 4 is slidably installed in the sleeve 3, and a mounting bracket 5 is fixed on the top of the column 4, and a support arm 6 is hinged on the mounting bracket 5. Specifically, the support arm 6 is hinged to the mounting bracket 5 through a second pin shaft 23, and the second pin shaft 23 penetrates the support arm 6 and the mounting bracket 5 to realize an articulated connection between the support arm 6 and the mounting bracket 5; a tray 7 that can move along the length direction of the support arm 6 is movably provided on the support arm 6; it also includes a height adjustment mechanism 8 and an angle adjustment mechanism 9, the height adjustment mechanism 8 is connected to the mounting bracket 5 and the sleeve 3 for adjusting the height of the mounting bracket 5, and the angle adjustment mechanism 9 is connected to the mounting bracket 5 and the support arm 6 for adjusting the inclination angle of the support arm 6.

[0023] In this embodiment, before installing the current transformer, the current transformer is placed on the tray 7 outside the compartment, and the chassis 1 can be easily pushed to move by the walking wheels 2, so that the device is moved to the high-voltage cabinet; according to the installation height, the height of the support arm 6 is adjusted up and down by the height adjustment mechanism 8; according to the installation position, the horizontal position of the tray 7 is adjusted by rotating the sleeve 3, and the tray 7 is pushed to move on the support arm 6 to push the tray 7 to the approximate installation position; the angle of the support arm 6 is fine-tuned by the angle adjustment mechanism 9, and the position of the tray 7 on the support arm 6 is fine-tuned, so that the installation thread holes of the current transformer and the thread holes of the high-voltage cabinet installation points are finally accurately connected.

[0024] In a specific embodiment, in order to facilitate the adjustment of the height of the mounting bracket 5, please refer to Figures 1 to 5 A height adjustment mechanism 8 is provided, including a first screw 10, a nut 11, and a fixed plate 12. The nut 11 is fixedly connected to the mounting frame 5, the fixed plate 12 is fixedly connected to the sleeve 3, a first bearing 14 is fixed on the fixed plate 12, and the first bearing 14 is a tapered roller bearing. The first screw 10 is rotatably mounted on the fixed plate 12 through the first bearing 14. The first screw 10 is threadedly connected to the nut 11. A rotary handle 13 is installed at the lower end of the first screw 10. In other embodiments, the rotary handle 13 can also be installed at the upper end of the first screw 10.

[0025] In this embodiment, the mounting frame 5 is held by hand to limit the rotation of the mounting frame 5, and then the first screw rod 10 is driven to rotate by rotating the handle 13, thereby driving the nut 11 and the mounting frame 5 to rise and fall.

[0026] In a specific embodiment, in order to facilitate the adjustment of the inclination angle of the support arm 6, please refer to Figures 1 to 5 The angle adjustment mechanism 9 includes a second screw 15, an internally threaded sleeve 16, and a handle 17. The handle 17 is fixedly mounted on the internally threaded sleeve 16. The internally threaded sleeve 16 is provided with two sections of internal threads with opposite rotation directions. The internally threaded sleeve 16 is internally threaded with two second screws 15, one of which is hinged to the support arm 6, and the other is hinged to the mounting frame 5. Specifically, an ear seat 18 is fixed to the end of the second screw 15 away from the internally threaded sleeve 16. An articulated seat 19 corresponding to the second screw 15 is fixed to the support arm 6 and the mounting frame 5. The ear seat 18 is articulated to the corresponding articulated seat 19 via a first pin 20. To facilitate the rotation of the internally threaded sleeve 16, a handle 17 is fixed to the internally threaded sleeve 16.

[0027] In this embodiment, the internal threaded sleeve 16 can be easily rotated by holding the handle 17. Since the two second screws 15 are respectively connected to the two sections of the internal threaded sleeve 16 with opposite rotation directions, after rotating the internal threaded sleeve 16, the two second screws 15 can be driven to extend or retract synchronously, thereby adjusting the overall length of the angle adjustment mechanism 9, and then adjusting the inclination angle of the support arm 6.

[0028] In a specific embodiment, in order to facilitate the movement of the tray 7 on the support arm 6 along the length direction of the support arm 6, please refer to Figure 1 and Figure 4A chute 21 is provided on the support arm 6, and rollers 22 are fixed to the bottom of the tray 7, which are in rolling connection with the chute 21. The support arm 6 is made of channel steel, and the chute 21 is formed by the structure of the channel steel itself; two rollers 22 are fixed to the bottom of the tray 7. The rollers 22 are made of Forma wheels. The wheel surface of the rollers 22 is relatively wide, which can increase the contact area with the chute 21. The chute 21 can also limit the tilt of the rollers 22, thereby stably supporting the tray 7 and allowing the tray 7 to move smoothly along the length of the support arm 6.

[0029] In one embodiment, to improve the strength of the chassis 1, please refer to Figure 2 The chassis 1 is made of a 10 mm thick steel plate. A transverse channel steel 25 and a longitudinal channel steel 26 are fixed to the lower end surface of the chassis 1. The longitudinal channel steel 26 is located on both sides of the transverse channel steel 25 and is fixedly connected to the transverse channel steel 25. The arrangement of the longitudinal channel steel 26 and the transverse channel steel 25 can improve the strength of the chassis 1.

[0030] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0031] The above embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the concept of the present invention, and these variations and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, 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 to the present invention.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0034] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

Claims

1. A special trolley for disassembling and assembling current transformers, characterized in that: The invention comprises a chassis (1), wherein a walking wheel (2) is installed at the lower end of the chassis (1), a sleeve (3) is rotatably installed at the upper end of the chassis (1), a column (4) is slidably installed in the sleeve (3), a mounting frame (5) is fixed to the top of the column (4), a supporting arm (6) is hinged on the mounting frame (5), and a tray (7) that can move along the length direction of the supporting arm (6) is movably provided on the supporting arm (6); and the invention also comprises a height adjustment mechanism (8) and an angle adjustment mechanism (9), wherein the height adjustment mechanism (8) is connected to the mounting frame (5) and the sleeve (3) for adjusting the height of the mounting frame (5), and the angle adjustment mechanism (9) is connected to the mounting frame (5) and the supporting arm (6) for adjusting the inclination angle of the supporting arm (6).

2. The special trolley for disassembling and assembling current transformer according to claim 1, characterized in that: The height adjustment mechanism (8) comprises a first screw (10), a nut (11), and a fixing plate (12); the nut (11) is fixedly connected to the mounting frame (5); the fixing plate (12) is fixedly connected to the sleeve (3); the first screw (10) is rotatably mounted on the fixing plate (12); and the first screw (10) is threadedly connected to the nut (11).

3. The special trolley for disassembling and assembling current transformer according to claim 2, characterized in that: A rotary handle (13) is mounted on the upper end or the lower end of the first screw (10).

4. The special trolley for disassembling and assembling current transformer according to claim 2, characterized in that: A first bearing (14) is fixed on the fixed plate (12), and the first screw (10) is rotatably mounted on the fixed plate (12) via the first bearing (14).

5. The special trolley for disassembling and assembling current transformer according to claim 1, characterized in that: The angle adjustment mechanism (9) comprises a second screw (15), an internally threaded sleeve (16) and a handle (17), wherein the handle (17) is fixedly mounted on the internally threaded sleeve (16), wherein the internally threaded sleeve (16) is provided with two sections of internal threads with opposite rotation directions, wherein the internal threads of the internally threaded sleeve (16) are connected to two second screws (15), wherein one of the second screws (15) is hinged to the support arm (6), and the other second screw (15) is hinged to the mounting frame (5).

6. The special trolley for disassembling and assembling current transformer according to claim 5, characterized in that: An ear seat (18) is fixed to one end of the second screw rod (15) away from the internal threaded sleeve (16), and a hinge seat (19) corresponding to the second screw rod (15) is fixed to the support arm (6) and the mounting frame (5), and the ear seat (18) is hinged to the corresponding hinge seat (19) through a first pin shaft (20).

7. The special trolley for disassembling and assembling current transformer according to claim 1, characterized in that: A slide groove (21) is provided on the support arm (6), and a roller (22) is fixed to the bottom of the tray (7), and the roller (22) is rollingly connected to the slide groove (21).

8. The special trolley for disassembling and assembling current transformer according to claim 1, characterized in that: The support arm (6) is hinged to the mounting frame (5) via a second pin shaft (23).

9. The special trolley for disassembling and assembling current transformer according to claim 1, characterized in that: A second bearing (24) is fixed on the chassis (1), and the sleeve (3) is rotatably mounted on the chassis (1) via the first bearing (14).

10. The special trolley for disassembling and assembling current transformer according to claim 1, characterized in that: A transverse channel steel (25) and a longitudinal channel steel (26) are fixed to the lower end surface of the chassis (1), the longitudinal channel steel (26) being located on both sides of the transverse channel steel (25), and the longitudinal channel steel (26) being fixedly connected to the transverse channel steel (25).

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