Short circuit release device for box-type substation test

Abstract

The utility model discloses a short circuit release device for a box-type substation test, and the device comprises a push rod mechanism which is fixed in a box body through a foot margin lock during the test; the switching copper bar is fixedly connected with a wiring terminal of the transformer; the push rod mechanism comprises a current-carrying copper bar which is arranged right below the switching copper bar; the current-carrying copper bar is fixed to the tops of the movable ends of the movable rods, the lower end of at least one movable rod is connected with the driving mechanism, and the current-carrying copper bar moves up and down under the action of the driving mechanism and the movable rods to be connected or disconnected with the switching copper bar. And the operation table is arranged outside the box body and is connected with the ejector rod mechanism through a cable penetrating out of the bottom of the box body. The mechanical execution part of the short circuit release device for the box-type substation test is composed of the insulation clamp bar, the right-angle switching copper bar and the electric self-locking ejector rod, and in a narrow space of a box-type substation, the operation table automatically executes short circuit and release action control on a mechanical device through the controller.

Description

TECHNICAL FIELD

[0001] The utility model relates to power detection technical field, concretely relates to a short circuit release device for box type substation test. BACKGROUND

[0002] Box type substation (abbreviation box type substation) is a kind of main power supply equipment in power grid, and transformer is the core in box type substation, to guarantee the safety of power grid and equipment, the safety performance of box type substation needs to be tested, and load loss test and temperature rise test are important test projects.

[0003] The load loss test of transformer is powered by high-voltage side, and the low-voltage side winding terminal is short-circuited, so that the winding current reaches the rated current value, and the load loss is measured. The temperature rise test of transformer adopts simulation load method, and is carried out according to the national standard "high voltage / low voltage pre-installed transformer substation" (GB / T 17467). The load loss test and temperature rise test of transformer need high-voltage winding to pass rated current and low-voltage winding to be short-circuited, that is, short-circuiting is needed for the two tests. In the load loss test and temperature rise test of box type substation, the low-voltage side terminal of transformer inside the box is close to the box wall, and the space is narrow, and the test personnel need to disassemble and assemble the short-circuiting copper bar for test in a short time. After temperature rise test, the temperature of the copper bar of the low-voltage winding terminal of transformer and the short-circuiting copper bar rises, and the proficiency of test personnel is very high, there is the risk of copper bar scalding, and there are problems of loose connection, poor fixation. SUMMARY

[0004] Therefore, the utility model embodiment provides a short-circuit release device for box type substation test to solve the problems of loose connection, poor fixation, copper bar scalding test personnel and other reliability and safety in load loss test and temperature rise test and other test projects in the prior art.

[0005] The utility model embodiment provides a short-circuit release device for box type substation test, comprising:

[0006] The top rod mechanism is fixed in the box by the foot lock during test;

[0007] The switching copper bar is fixedly connected with the wiring terminal of the transformer;

[0008] The operation table is arranged outside the box and is connected with the cable line passing through the bottom of the box;

[0009] The top rod mechanism comprises: a current-carrying copper bar arranged directly below the switching copper bar;The current-carrying copper bar is fixed on the top of the movable end of the plurality of movable rods, the lower end of at least one movable rod is connected with the driving mechanism, and the current-carrying copper bar moves up and down under the action of the driving mechanism and the movable rod, so as to realize the conduction or disconnection with the switching copper bar.

[0010] Optionally, the ejector rod mechanism further comprises:

[0011] a base fixed in the box by four supporting frames;

[0012] a back plate fixed above the base;

[0013] a side plate fixed at the upper region of the back plate;

[0014] wherein the driving mechanism is fixed in the ejector rod mechanism by a mounting seat located at the lower region of the side plate; the driving mechanism is hinged to the mounting seat.

[0015] Optionally, the ejector rod mechanism further comprises:

[0016] a guide seat arranged at the upper region of the side plate, the movable rod moving up and down along the guide channel of the guide seat.

[0017] Optionally, the ejector rod mechanism further comprises:

[0018] a movable block, the first hinged end of which is hinged to a fixed seat fixed on the side plate, and the second hinged end of which is hinged to the piston end of the driving mechanism;

[0019] a connecting arm plate, the upper end of which is hinged to the movable rod, and the lower end of which is hinged to the third hinged end of the movable block.

[0020] Optionally, the ejector rod mechanism further comprises:

[0021] a stopper fixed on the back plate and arranged directly below the driving mechanism.

[0022] Optionally, the supporting frame is an adjustable height supporting frame; a counterweight is arranged below the supporting frame.

[0023] Optionally, the ejector rod mechanism further comprises:

[0024] an outer shell forming a box with an open upper end with the base and the back plate.

[0025] Optionally, the utility model further comprises:

[0026] a visible camera arranged in the box and communicatively connected to the operation platform.

[0027] Optionally, the adapter copper bar is a right-angle bent piece.

[0028] Optionally, the ejector rod mechanism further comprises:

[0029] an insulating clamp bar fixed on the other side of the upper end of the back plate relative to the side plate, for fixing the upper end of the supporting rod sleeved in the movable rod.

[0030] The utility model has the advantages of:

[0031] 1. This utility model embodiment provides a short-circuit release device for testing prefabricated substations, used to perform short-circuit connection and release actions on the low-voltage side winding outgoing terminals of a transformer. The connection position is at the upper end of the copper busbar of the low-voltage side outgoing terminals of the transformer. The mechanical actuation part of the short-circuit release device for testing prefabricated substations provided in this embodiment consists of an insulating clamp, a right-angle transition copper busbar, and an electrically self-locking push rod. The electrical control part consists of an operating panel, a communication interface, and a controller, realizing automatic short-circuit and release actions of the mechanical device by the operating panel through the controller within the confined space of the prefabricated substation.

[0032] 2. A right-angle adapter copper busbar is used to connect to the transformer terminal block, breaking the traditional horizontal short-circuiting method and overcoming the problems of the horizontal distance being too close to the enclosure and the limited space making disassembly and assembly inconvenient.

[0033] 3. The push rod mechanism is hinged to the drive mechanism and the movable rod through a triangular movable block. It achieves self-locking after performing a short-circuit action, eliminating the need for continuous power supply, thus reducing energy consumption and improving the safety of the test. Attached Figure Description

[0034] The features and advantages of this utility model will be more clearly understood by referring to the accompanying drawings. The drawings are schematic and should not be construed as limiting the utility model in any way. In the drawings:

[0035] Figure 1 This invention illustrates a system structure diagram of a short-circuit release device for testing a prefabricated substation, according to an embodiment of the present invention.

[0036] Figure 2 This invention provides an internal structural diagram of a short-circuit release device for testing a prefabricated substation, as shown in an embodiment of the present invention.

[0037] Figure 3 A partially enlarged view of the top rod mechanism in a short-circuit release device for testing a prefabricated substation, according to an embodiment of the present invention, is shown.

[0038] Figure 4 A schematic diagram of a height-adjustable bracket for a short-circuit release device used in a prefabricated substation test, according to an embodiment of this utility model, is shown. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0040] As Figures 1 to 3 shown, the utility model embodiment provides a short -circuit release device for box -type substation test, including top rod mechanism 1, switching copper bar 3, operation platform 5 and visual camera 6, wherein top rod mechanism 1 pushes into box -type substation when testing, and it is fixed in box 2 by ground anchor lock, switching copper bar 3 is fixedly connected with the wiring terminal of transformer 4 low voltage side winding. Operation platform 5 is set up at the outside of box 2, and is connected with top rod mechanism 1 through the cable line of box bottom. Visual camera 6 is set up in box 2, and is communicatively connected with operation platform 5, and the equipment in box 2 is monitored through the screen of operation platform 5.

[0041] Top rod mechanism 1 includes base, backboard and side plate, wherein the base is fixed in box 2 by four support frames, the backboard is fixed above the base, and the side plate is fixed in the upper region of the backboard. Drive mechanism 103 is fixed in top rod mechanism 1 through mounting seat 104 located in the lower region of the side plate; drive mechanism 103 is hinged on mounting seat 104.

[0042] As Figure 2 shown, current -carrying copper bar 101 is arranged directly below switching copper bar 3. Current -carrying copper bar 101 is fixed at the top of the movable end of a plurality of movable rods 102, and the lower end of at least one movable rod 102 is connected with drive mechanism 103. Current -carrying copper bar 101 moves up and down under the action of drive mechanism 103 and movable rod 102, realizes the conduction or disconnection with switching copper bar.

[0043] In the embodiment, three movable rods 102 are provided, and each movable rod 102 is provided with a matched drive mechanism. In a specific embodiment, the movable rod 102 is a hollow pipe, the lower end is connected with the drive mechanism 103, the upper end is fixed with the current -carrying copper bar 101, the movable rod 102 is sleeved with a support rod, and the two support rods at the edge are fixed on the upper end of the top rod mechanism 1 through the insulating clamp. In a specific embodiment, the middle support rod is fixedly connected with the switching copper bar 3, and the insulating clamp and the bottom of the switching copper bar are on the same horizontal plane. Specifically, the drive mechanism adopts a servo motor.

[0044] As Figure 3 shown, the top rod mechanism further includes a guide seat 105 arranged in the upper region of the side plate, and the movable rod 102 moves up and down along the guide channel of the guide seat 105. The movable block 106 is hinged at a first hinge end with a fixed seat 107 fixed on the side plate, and a second hinge end of the movable block 106 is hinged with a piston end of the drive mechanism 103. The connecting arm plate 108 is hinged at an upper end with the movable rod 102, and a lower end of the connecting arm plate 108 is hinged with a third hinge end of the movable block 106.

[0045] In the embodiment, the movable block is a triangle, and the triangle has stability, that is, after the lengths of the three sides of the triangle are determined, the shape and size of the triangle are fixed and unchangeable.In some mechanical structures or physical scenes, when an object forms a triangular structure, it is very difficult for external force to change the shape of the object.This is because the internal angle sum of the triangle is 180 degrees, and the three sides of the triangle restrict each other, and under the action of external force, internal forces are generated in the three sides to resist each other, thereby preventing the triangle from deforming, so that the self-locking effect is achieved.

[0046] As an optional implementation, the ejector rod mechanism 1 further comprises a position limiter 109 fixed on the back plate and arranged directly below the driving mechanism 103.The position limiter serves to feed back whether the actuator is in a short-circuiting or releasing state.

[0047] As shown in Figure 4 The support frame is an adjustable height support frame, so as to adapt to transformers of different specifications for installation.

[0048] The utility model embodiment provides a short circuit release device for box type substation test for executing transformer low pressure side winding terminal short circuit connection and releasing action, and the connection position is on the upper end of the copper bar of the transformer low pressure side outlet terminal.

[0049] The right-angle adapter copper bar is connected with the transformer terminal, breaks the traditional horizontal transverse short circuit mode, and overcomes the problem that the horizontal distance is too close to the box wall, and the space is too small to facilitate disassembly and assembly.

[0050] The ejector rod mechanism is hinged with the driving mechanism and the movable rod through the triangular movable block, realizes self-locking after executing the short circuiting action, does not need to be continuously powered, reduces energy consumption, and improves the safety of the test.

[0051] Although the embodiments of the utility model are described in combination with the drawings, those skilled in the art can make various modifications and changes without departing from the spirit and scope of the utility model, and such modifications and changes all fall within the scope defined by the appended claims.

Claims

1. A short-circuit release device for testing prefabricated substations, characterized in that, include: The top rod mechanism (1) is fixed inside the box (2) by anchor locks during the test; The copper busbar (3) is fixedly connected to the wiring terminals of the low-voltage winding of the transformer (4); The operating table (5) is located outside the housing (2) and is connected to the top rod mechanism (1) through a cable passing through the bottom of the housing (2); The top rod mechanism (1) includes a current-carrying copper busbar (101) disposed directly below the adapter copper busbar (3); the current-carrying copper busbar (101) is fixed to the top of the movable ends of several movable rods (102), and the lower end of at least one of the movable rods (102) is connected to the drive mechanism (103). The current-carrying copper busbar (101) moves up and down under the action of the drive mechanism (103) and the movable rods (102) to achieve connection or disconnection with the adapter copper busbar.

2. The short-circuit release device for testing prefabricated substations according to claim 1, characterized in that, The push rod mechanism (1) further includes: The base is fixed inside the box (2) by four support frames; Back plate, fixed above the base; Side panels, fixed to the upper area of ​​the back panel; The drive mechanism (103) is fixed in the top rod mechanism (1) by a mounting base (104) located in the lower region of the side plate; the drive mechanism (103) is hinged to the mounting base (104).

3. The short-circuit release device for testing prefabricated substations according to claim 2, characterized in that, The push rod mechanism also includes: A guide seat (105) is provided in the upper region of the side plate, and the movable rod (102) moves up and down along the guide channel of the guide seat (105).

4. The short-circuit release device for testing prefabricated substations according to claim 3, characterized in that, The push rod mechanism (1) further includes: The movable block (106) has its first hinge end hinged to the fixed seat (107) fixed on the side plate, and the second hinge end of the movable block (106) is hinged to the piston end of the drive mechanism (103). The upper end of the connecting arm plate (108) is hinged to the movable rod (102), and the lower end of the connecting arm plate (108) is hinged to the third hinge end of the movable block (106).

5. The short-circuit release device for testing prefabricated substations according to claim 2, characterized in that, The push rod mechanism (1) further includes: The limiter (109) is fixed on the back plate and is located directly below the drive mechanism (103).

6. The short-circuit release device for testing prefabricated substations according to claim 2, characterized in that, The support frame is an adjustable height bracket; a counterweight (110) is provided below the support frame.

7. The short-circuit release device for testing prefabricated substations according to claim 2, characterized in that, The push rod mechanism (1) further includes: The outer casing, together with the base and the back plate, forms a box with an opening at the top.

8. The short-circuit release device for testing prefabricated substations according to claim 1, characterized in that, Also includes: A video camera (6) is installed inside the housing (2) and is connected in communication with the control panel (5).

9. The short-circuit release device for testing prefabricated substations according to claim 1, characterized in that, The adapter copper busbar (3) is a right-angle bent part.

10. The short-circuit release device for testing prefabricated substations according to claim 2, characterized in that, The push rod mechanism (1) further includes: An insulating clamp is fixed to the upper end of the back plate on the opposite side of the side plate, and is used to fix the upper end of the support rod sleeved in the movable rod (102).

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