Auxiliary handcart of high-voltage switch cabinet

Abstract

The invention provides an auxiliary handcart of a high-voltage switch cabinet, which comprises a handcart body, three moving contacts and three test terminals, and is characterized in that the three moving contacts are mounted at the front end of the handcart body in an insulating manner, and the three moving contacts are used for being in contact with the three static contacts when the handcart body is pushed into the high-voltage switch cabinet; the rear end of the vehicle body is provided with three test terminals in an insulated manner. Pressing wheels are arranged at the bottom of the trolley body and used for opening a lifting curtain for shielding a static contact when the trolley body is pushed into the high-voltage switch cabinet. According to the implementation mode, when insulation is measured, the three moving contacts are connected with the three test terminals through the insulated wires, and after the vehicle body is pushed into the high-voltage switch cabinet, the insulation is measured through the test terminals; during grounding, the three test terminals are detached, the three moving contacts and the grounding device are connected through a three-phase short-circuit grounding wire, and grounding is completed after the vehicle body is pushed into the high-voltage switch cabinet. During electricity testing, the three moving contacts and the three testing terminals are detached, and after the vehicle body is pushed into the high-voltage switch cabinet, electricity testing is completed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of auxiliary tools for high-voltage switch cabinets, and particularly relates to an auxiliary handcart for a high-voltage switch cabinet. BACKGROUND

[0002] In view of safety considerations, a high-voltage switch cabinet is configured such that the load rear cabinet door can only be opened after the switch is closed on the grounding knife switch, and after the rear cabinet door is opened, the grounding knife switch cannot be separated, so as to ensure that the three-phase short-circuit grounding can be maintained during the exposure of the load cable, and the safety of the workers is ensured.

[0003] However, this safety locking mode also has many inconveniences. For example, when measuring the insulation of the load before power transmission, the grounding knife switch needs to be separated, and in order to separate the grounding knife switch, the load rear cabinet door needs to be closed, but after the load rear cabinet door is closed, the insulation cannot be measured.

[0004] If the insulation is measured from the load static contact of the high-voltage switch cabinet, the load static contact is usually shielded by the curtain. Specifically, refer to Figure 1 , Figure 1 The structural schematic diagram of an embodiment of the high-voltage switch cabinet is shown in the figure. When the switch handcart enters the high-voltage switch cabinet, the pressing shaft of the switch handcart presses the pressing rod downward, so that the curtain moves downward, thereby exposing the power static contact and the load static contact, so as to be connected with the switch handcart. When the switch handcart leaves the high-voltage switch cabinet, the curtain is pulled upward under the action of the spring, thereby shielding the power static contact and the load static contact.

[0005] Even if the curtain is opened, direct insulation measurement is easy to cause electric shock danger because the distance from the power static contact is too close.

[0006] In addition, for some old high-voltage switch cabinets, there is no grounding knife switch, and when the grounding and electricity testing operations are performed, the operations cannot be performed from the front of the high-voltage switch cabinet. When the load rear cabinet door is opened to perform the above operations, it is relatively cumbersome and violates the operation procedures, and therefore an auxiliary tool is needed to solve the above problems. SUMMARY

[0007] The summary part of the present application is used to introduce the concepts in a brief form, which will be described in detail in the specific embodiment part. The summary part of the present application is not intended to identify the key features or essential features of the claimed technical solution, nor is it intended to limit the scope of the claimed technical solution.

[0008] Some embodiments of the present application provide an auxiliary handcart for a high-voltage switch cabinet to solve the technical problems mentioned in the background part.

[0009] Some embodiments of the present application provide an auxiliary trolley for high-voltage switch cabinet, comprising a trolley body, three movable contacts and three test terminals, wherein, The front end of the trolley body is insulatively mounted with the three movable contacts, which are used to contact with three static contacts when the trolley body is pushed into the high-voltage switch cabinet; the rear end of the trolley body is insulatively mounted with the three test terminals; the bottom of the trolley body is provided with a pressure wheel, which is used to open the curtain to shield the static contacts when the trolley body is pushed into the high-voltage switch cabinet; In the insulation measurement, the three movable contacts are connected with the three test terminals through insulating wires, and the insulation is measured through the test terminals after the trolley body is pushed into the high-voltage switch cabinet; In the grounding, the three test terminals are disassembled, and the three movable contacts and the grounding device are connected by using three-phase short-circuit grounding wires, and the grounding is completed after the trolley body is pushed into the high-voltage switch cabinet; In the electricity testing, the three movable contacts and the three test terminals are disassembled, and the electricity testing is completed after the trolley body is pushed into the high-voltage switch cabinet.

[0010] Optionally, the two sides of the trolley body are provided with running wheels, and guide rails are arranged on the two sides in the high-voltage switch cabinet; when the trolley body is pushed into the high-voltage switch cabinet, the running wheels roll in the guide rails.

[0011] Optionally, the front end of the trolley body is provided with a first insulating plate, and the three movable contacts are detachably mounted on the first insulating plate.

[0012] Optionally, the rear end of the trolley body is provided with a second insulating plate, and the three test terminals are detachably mounted on the second insulating plate.

[0013] Optionally, the second insulating plate is wider than the high-voltage switch cabinet, and is used to limit the stroke of the trolley body.

[0014] Optionally, the side of the second insulating plate facing the high-voltage switch cabinet is provided with rubber pads on both sides.

[0015] Optionally, two vertical rod seats are arranged on the second insulating plate at intervals, and two vertical rods are hinged on the vertical rod seats, and the two vertical rods can be erected or laid inward on the second insulating plate.

[0016] Optionally, a locking mechanism is arranged on each vertical rod seat to fix the vertical rod.

[0017] Optionally, a pull belt printed with warning words is connected to one vertical rod, and a free end of the pull belt is provided with a pull belt male head to be connected with a pull belt female head on the other vertical rod.

[0018] Optionally, the vertical rod connected with the pull belt is provided with a winding mechanism.

[0019] The above-mentioned embodiments of the present application have the following beneficial effects: By setting the pressing wheel under the vehicle body, the pressing rod can be acted on, so that the curtain is lowered, thereby exposing the three load static contacts, solving the problem that the load static contact is blocked by the curtain and cannot be operated, such as insulation measurement, so that the moving contact and the load static contact are in contact smoothly.

[0020] When measuring insulation, the three moving contacts are connected to the three test terminals through the insulation wire, and the staff can measure the insulation through the test terminal, which is safe and convenient.

[0021] For high-voltage switch cabinets without grounding knife switches, three-phase short-circuit grounding wires can be used to connect the three moving contacts and the grounding device, and when the vehicle body is pushed into the high-voltage switch cabinet, grounding is completed. Compared with opening the load cabinet door and manually hanging the ground wire on the load cable, the efficiency is higher and more convenient.

[0022] Finally, when the moving contact is removed, the vehicle body is pushed into the high-voltage switch cabinet, the curtain is opened, and the load static contact is no longer blocked, so the staff can directly perform the electricity test operation on the load static contact, thereby improving the electricity test efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0024] Figure 1 is a structural schematic view of a high-voltage switch cabinet; Figure 2 is a structural schematic view of one embodiment of the auxiliary handcart of the high-voltage switch cabinet of the present application; Figure 3 is an exploded schematic view of the auxiliary handcart of the high-voltage switch cabinet of the present application; Figure 4 is a structural schematic view of one embodiment of the vertical rod standing up of the present application; Figure 5 is a structural schematic view of one embodiment of the vertical rod laying down of the present application; Figure 6 is a structural schematic view of the auxiliary handcart of the high-voltage switch cabinet of the present application when measuring insulation; Figure 7 is a structural schematic view of the auxiliary handcart of the high-voltage switch cabinet of the present application when grounding; Figure 8 is a structural schematic view of the auxiliary handcart of the high-voltage switch cabinet of the present application when electricity testing.

[0025] Explanation of reference signs: 1, vehicle body; 11, first insulating plate; 12, second insulating plate; 121, handle; 13, pressure wheel; 14, running wheel; 15, guide rail; 16, vertical rod seat; 17, vertical rod; 18, pull belt; 181, male end of pull belt; 182, female end of pull belt; 2, moving contact; 3, test terminal; 4, insulated wire; 5, three-phase short-circuit grounding wire 6, grounding device. DETAILED DESCRIPTION

[0026] The technical solutions of the present application will be described in detail below in conjunction with the embodiments. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0028] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, "a plurality of" means two or more, unless otherwise explicitly and specifically limited. In addition, the terms "mounting", "connecting", and "connecting" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0030] Please refer to Figure 2 and Figure 3The auxiliary handcart of the high-voltage switch cabinet comprises a cart body 1, three movable contacts 2 and three test terminals 3.

[0031] The bottom of the cart body 1 is provided with a pressure wheel 13, which can act on the pressure rod when the auxiliary handcart is pushed into the high-voltage switch cabinet, so that the curtain is lowered to expose the three load static contacts. In this way, the problem of the load static contact being blocked by the curtain and unable to perform insulation measurement and other operations is solved. As an example, the above-mentioned pressure wheel 13 can be a plastic wheel.

[0032] The three movable contacts 2 are insulatively mounted to the front end of the cart body 1, and the three test terminals 3 are insulatively mounted to the rear end of the cart body 1. Specifically, the front end and the rear end of the cart body 1 are respectively provided with a first insulating plate 11 and a second insulating plate 12 for respectively detachably mounting the three movable contacts 2 and the three test terminals 3.

[0033] The three movable contacts 2 are provided in one-to-one correspondence with the three load static contacts, and can be in contact with the three load static contacts when the auxiliary handcart is pushed into the high-voltage switch cabinet. As an example, the above-mentioned movable contact 2 can be a special monkey head type straight plug contact for power line.

[0034] Further, in order to ensure that the three movable contacts 2 and the three load static contacts are in contact smoothly, guide rails 15 are respectively arranged on both sides in the high-voltage switch cabinet, and row wheels 14 are correspondingly arranged on both sides of the cart body 1. As an example, the above-mentioned guide rail 15 can be a C-shaped rail, and the row wheel 14 can be a bearing. When the cart body 1 is pushed into the high-voltage switch cabinet, the row wheels 14 roll in the guide rails 15. In this way, the height of the guide rails 15 can limit the height of the three movable contacts 2, ensuring that the movable contacts 2 and the load static contacts are aligned in the vertical direction. The rolling direction of the row wheels 14 is limited by the guide rails 15, which can avoid the cart body 1 from tilting or deviating from the travel route, ensuring that the movable contacts 2 and the load static contacts are aligned in the horizontal direction, and improving the reliability of the auxiliary handcart.

[0035] The outer end faces of the above-mentioned second insulating plate 12 are provided with handles 121 for pushing and pulling the cart body 1. The width of the second insulating plate 12 is greater than that of the high-voltage switch cabinet, so that after the auxiliary handcart enters the high-voltage switch cabinet, the inner end faces of the second insulating plate 12 can abut against both sides of the high-voltage switch cabinet, thereby avoiding the cart body 1 from entering too much and damaging the movable contacts 2 or the load static contacts. Further, in order to buffer the impact force between the second insulating plate 12 and the high-voltage switch cabinet, rubber pads are arranged on both sides of the inner end faces of the second insulating plate 12.

[0036] Please refer to Figure 4 and Figure 5Two pole supports 16 are spaced apart on the second insulating plate 12, and a pole 17 is hinged to each pole support 16. The two poles 17 can be erected or laid inwards on the second insulating plate 12, facilitating storage and handling. Furthermore, each pole support 16 can be equipped with a locking mechanism to lock the pole 17 when it is erected. As an example, the locking mechanism can be a pin, which, when the pole 17 is erected, is horizontally (…). Figure 4 The pin (as shown in the left-right direction) is inserted into the upright base 16 and the upright 17 to lock the upright 17 and prevent it from rotating around the hinge axis. When the upright 17 is laid down, the pin can be inserted vertically (as shown in the left-right direction). Figure 5 The upright 17 and the second insulating plate 12 are inserted (as shown in the upper and lower directions) to lock the upright 17.

[0037] Please see Figure 6 to Figure 8 A winding mechanism can be installed on the right-side pull rod, which is used to wind up the pull belt 18. The free end of the pull belt 18 ( Figure 6 The left end of the rod can be equipped with a male pull strap 181, and the left pull rod is equipped with a female pull strap 182. After the upright rod 17 is erected and locked, the male pull strap 181 can be pulled out to engage with the female pull strap 182, so that the pull strap 18 is unfolded.

[0038] One or more pull straps can be installed on the pull strap 18, and those skilled in the art can choose according to the actual situation. Figure 6 to Figure 8 The example shown uses two pull straps 18. The upper pull strap 18 is positioned so that it aligns with the stationary power contact, thus shielding the power contact after the auxiliary trolley is pushed into the high-voltage switchgear. Furthermore, warning messages can be placed on the pull strap 18, such as "Maintain a safe distance when the power contact is live." The warning messages on the lower pull strap 18 can be related to the current operation. For example, when measuring insulation, the warning message could be "Discharge must be performed after insulation measurement"; when grounding, the warning message could be "Ground before pushing in"; and when testing for voltage, the warning message could be "Confirm the voltage tester is in good working order before testing," thus serving as a reminder and warning.

[0039] Combination Figure 6The operation for measuring insulation is explained below. First, install the three moving contacts 2 and the three test terminals 3 onto the first insulating plate 11 and the second insulating plate 12 respectively, and connect the corresponding moving contacts 2 and test terminals 3 with three insulated wires 4. Next, erect the support pole 17 and attach the pull strap 18. Then, align the wheels 14 of the trolley body 1 with the track and push it into the high-voltage switchgear by holding the handle 121. During the pushing process, the pressure roller 13 acts on the pressure rod, causing the pressure rod to drive the curtain downwards. Continue until the second insulating plate 12 contacts both sides of the high-voltage switchgear, indicating that the auxiliary trolley has been pushed in place and the three moving contacts 2 have made contact with the three load stationary contacts. Then, the operator can measure the load insulation at the three test terminals 3, which is both convenient and safe. Finally, after the insulation measurement operation is completed and the circuit is discharged, pull out the auxiliary trolley.

[0040] Combination Figure 7 The grounding operation is explained below. First, install the three moving contacts 2 onto the first insulating plate 11, and connect the three moving contacts 2 with a three-phase short-circuit grounding wire 5. The other end of the three-phase short-circuit grounding wire 5 is connected to the grounding device 6, such as a grounding clamp. Next, erect the pole 17 and attach the pull strap 18. Then, align the wheels 14 of the vehicle body 1 with the rails and push it into the high-voltage switchgear by holding the handle 121. During the pushing process, the pressure roller 13 acts on the pressure rod, causing the pressure rod to drive the curtain downwards. Continue until the second insulating plate 12 contacts both sides of the high-voltage switchgear, indicating that the auxiliary trolley has been pushed in place and the three moving contacts 2 have made contact with the three load stationary contacts, completing the grounding operation.

[0041] Combination Figure 8 The procedure for voltage testing is as follows: Remove the moving contact 2 and test terminal 3, erect the support pole 17, and attach the pull strap 18. Then, align the wheels 14 of the trolley body 1 with the rails and push it into the high-voltage switchgear by holding the handle 121. During the pushing process, the pressure roller 13 acts on the pressure rod, causing the pressure rod to open the curtain downwards. Continue until the second insulating plate 12 contacts both sides of the high-voltage switchgear, indicating that the auxiliary trolley has been pushed in place. After confirming that the voltage detector is intact, the operator uses the voltage detector to insert it between the two pull straps 18 and test for voltage on the three load stationary contacts.

[0042] Because the repeated disassembly and reassembly of the moving contact 2 and / or test terminal 3 during operations such as insulation measurement, grounding, and voltage testing by the auxiliary handcart can affect work efficiency. Therefore, those skilled in the art can... Figure 6 , Figure 7 and Figure 8 As shown, three auxiliary handcarts were made for measuring insulation, grounding, and voltage detection, respectively, thereby improving work efficiency and making them convenient and practical.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An auxiliary trolley for a high-voltage switchgear, characterized in that, It includes the vehicle body, three moving contacts, and three test terminals, among which, The front end of the vehicle body is insulated with three moving contacts, which are used to contact three stationary contacts when the vehicle body is pushed into the high-voltage switchgear; the rear end of the vehicle body is insulated with three test terminals; the bottom of the vehicle body is equipped with pressure rollers, which are used to open the curtain that blocks the stationary contacts when the vehicle body is pushed into the high-voltage switchgear. When measuring insulation, the three moving contacts are connected to the three test terminals through insulated wires. After the vehicle body is pushed into the high-voltage switchgear, the insulation is measured through the test terminals. During grounding, the three test terminals are removed, and the three moving contacts and grounding device are connected by a three-phase short-circuit grounding wire. Grounding is completed when the vehicle body is pushed into the high-voltage switch cabinet. During the voltage test, three moving contacts and three test terminals are removed. The voltage test is completed after the vehicle body is pushed into the high-voltage switch cabinet.

2. The auxiliary handcart for the high-voltage switchgear according to claim 1, characterized in that, The vehicle body is equipped with wheels on both sides, and guide rails are installed on both sides inside the high-voltage switchgear; when the vehicle body is pushed into the high-voltage switchgear, the wheels roll within the guide rails.

3. The auxiliary trolley for the high-voltage switchgear according to claim 1, characterized in that, The front end of the vehicle body is provided with a first insulating plate, and three moving contacts are detachably installed on the first insulating plate.

4. The auxiliary trolley for the high-voltage switchgear according to claim 1, characterized in that, A second insulating plate is provided at the rear end of the vehicle body, and three test terminals are detachably installed on the second insulating plate.

5. The auxiliary trolley for the high-voltage switchgear according to claim 4, characterized in that, The second insulating plate is wider than the high-voltage switchgear and is used to limit the travel of the vehicle body.

6. The auxiliary trolley for the high-voltage switchgear according to claim 5, characterized in that, Rubber pads are provided on both sides of the side of the second insulating plate facing the high-voltage switchgear.

7. The auxiliary trolley for a high-voltage switchgear according to claim 6, characterized in that, Two pole seats are spaced apart on the second insulating plate, and two poles are hinged to the pole seats. The two poles can be erected or laid down inward on the second insulating plate.

8. The auxiliary trolley for the high-voltage switchgear according to claim 7, characterized in that, Each of the pole supports is equipped with a locking mechanism for securing the pole.

9. The auxiliary trolley for a high-voltage switchgear according to claim 8, characterized in that, A pull strap with warning messages is attached to one pole. The free end of the pull strap has a male end for connecting to a female end on another pole.

10. The auxiliary trolley for a high-voltage switchgear according to claim 9, characterized in that, The uprights connected to the pull strap are equipped with a winding mechanism.

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