10kV handcart switch dynamic characteristic test junction box

Abstract

The utility model relates to a 10kV handcart switch dynamic characteristic test junction box, which comprises a junction box main body, a cover plate, a gear selection knob, three double-position microswitches, six binding posts and a plurality of female pins matched with aviation plug male pins, the cover plate is covered on the junction box main body, the three double-position microswitches are arranged in the junction box main body, and the six binding posts are arranged in the junction box main body. Each double-position microswitch is provided with a pair of normally-open contacts and a pair of normally-closed contacts, a plurality of aviation pin holes are formed in the junction box body, a plurality of female pins are arranged in the junction box body and installed on the corresponding aviation pin holes respectively, six binding post holes are formed in the cover plate, and six binding posts are installed on the corresponding binding post holes respectively. The plurality of female needles are respectively connected with the corresponding binding posts, the normally open contact and the normally closed contact through wires, and the gear selecting knob is arranged on the junction box main body and is in rotary contact with the three double-position microswitches so as to switch the working states of the three double-position microswitches at the same time. The device is simple in structure, small in size, high in portability and easy to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of trolley switch testing, and particularly relates to a wiring box for dynamic characteristic test of 10kV trolley switch. Background Art

[0002] The 10kV trolley switch is a kind of high-voltage switch equipment used for 10kV voltage level in the power system. It is usually installed in a high-voltage switch cabinet and has a movable trolley design, which is convenient for maintenance and overhaul.

[0003] The dynamic characteristic test (also called mechanical characteristic test) of the 10kV trolley switch is an important test for the 10kV trolley switch in the power system to evaluate and ensure the mechanical performance and safety of the trolley switch during operation. The dynamic characteristic test is mainly to test the performance of the trolley switch during opening and closing operations, including the contact condition of the contacts, the switch action time, the bounce time, the closing speed, etc., to ensure the reliability and safety of the switch operation.

[0004] In the dynamic characteristic test method, for the primary circuit: one end of the upper and lower contacts of the trolley switch is short-circuited and grounded at abc, and the other end is connected to the mechanical characteristic instrument through a test wire; for the secondary circuit: first, find the positions of 6 pins of "closing +, closing -, opening +, opening -, energy storage +, energy storage -" (hereinafter referred to as 6 pins) on the aviation plug of the trolley switch according to the switch instruction manual; second, clamp the test wire clip on the pins; third, connect to the mechanical characteristic instrument through a test wire. Finally, use the instrument to conduct the mechanical characteristic test. However, the existing technology has the following disadvantages: (1) Efficiency problem: When performing connection operations (including positioning / finding the pins of the aviation plug required for the test, connecting the test wire to the pins of the aviation plug, and wiring at the test instrument), the required time is relatively long, resulting in low overall work efficiency; (2) Space limitation: The pins of the aviation plug are arranged densely (especially on the aviation plug of the 10kV trolley switch, there are 58 pins in total), which makes it difficult to accurately connect the test wire clip to the pins of the aviation plug required for the test; (3) Safety risk: Since most test wire clips have exposed metal parts, and the positions of multiple adjacent pins are very close, the test wire clips connected to the pins being too close may cause accidental short circuits; (4) Insufficient stability: The test wire clip may not be firmly fixed, and the vibration during the opening or closing operation of the switch may cause the test wire clip to fall off, and the maintenance personnel have to fix it again; (5) Difficulty in positioning: Maintenance personnel often need to carry the operation manual of the switch to determine the specific positions of the pins required for the test on the aviation plug. This traditional method can no longer meet the high-efficiency requirements of current maintenance work, and often leads to too long power outage time for maintenance, causing economic losses to power supply.

[0005] Chinese Patent CN205427145U discloses an intelligent converter for assisting in the switching of the mechanical characteristic test mode of a handcart switch. By setting a remote control module, a contactor module, and a controller module, and pressing the numeric keys on the remote control module to select the corresponding required mode, the intelligent converter can match the 8-pin output on the test line of the switch mechanical characteristic instrument with the 58 pins on the aviation plug of the handcart switch through the cooperation between the contactor module and the controller module. During the whole process of using this intelligent converter to test the mechanical characteristics of the handcart switch, there is no need to change the test wiring, perform manual energy storage, and manually release the lock. The entire test process can be carried out by a single person, thus improving the work efficiency of testing the mechanical characteristics of the handcart switch. However, the device provided by this patent has the following disadvantages: This device requires five modules, namely, a contactor module, a controller module, a power supply module, a remote control module, and a mode display module. Each structure requires various electronic chip components inside. Not only is the structure complex, with a large number of components required, and the implementation cost is high, but also a variety of electronic components are used, which are prone to failure, and the overall reliability is discounted. In addition, the device is large in volume and weight, and has low portability. Summary of the Utility Model

[0006] The purpose of the present utility model is to provide a dynamic characteristic test wiring box for a 10kV handcart switch, which has a simple structure, a small volume, high portability, and is easy to operate.

[0007] To achieve the above purpose, the technical solution adopted by the present utility model is: A dynamic characteristic test wiring box for a 10kV handcart switch, including a wiring box main body, a cover plate, a gear selection knob, three double-position microswitches, six terminal posts, and multiple female pins adapted to the male pins of the aviation plug. The cover plate is covered on the wiring box main body. The three double-position microswitches are arranged inside the wiring box main body. Each double-position microswitch has a pair of normally open contacts and a pair of normally closed contacts. A plurality of aviation pin holes are opened on the wiring box main body. The multiple female pins are arranged inside the wiring box main body and are respectively installed on the corresponding aviation pin holes. Six terminal post holes are opened on the cover plate. The six terminal posts are respectively installed on the corresponding terminal post holes. The multiple female pins are respectively connected to the corresponding terminal posts and the normally open and normally closed contacts through wires. The gear selection knob is installed on the wiring box main body and rotates in contact with the three double-position microswitches to simultaneously switch the working states of the three double-position microswitches.

[0008] Further, the six terminal posts are a closing + terminal post, a closing - terminal post, a tripping + terminal post, a tripping - terminal post, an energy storage + terminal post, and an energy storage - terminal post.

[0009] Further, it includes ten female pins. Ten aviation pin holes are opened on the wiring box main body. The ten female pins are respectively installed on the corresponding aviation pin holes.

[0010] Further, the 10 female pins are the 2nd female pin, 3rd female pin, 4th female pin, 12th female pin, 13th female pin, 14th female pin, 25th female pin, 30th female pin, 31st female pin, and 35th female pin; the 4th female pin and the 14th female pin are the common female pins for the dynamic characteristic tests of two types of draw-out switches.

[0011] Further, the 3rd female pin is connected to the normally open contact of the first double-position microswitch through an inner conductor wire and then connected to the closing + terminal block; the 13th female pin is connected to the closing - terminal block through an inner conductor wire; the 4th female pin is connected to the normally closed contact of the first double-position microswitch through an inner conductor wire and then connected to the closing + terminal block; the 14th female pin is connected to the closing - terminal block through an inner conductor wire; the 4th female pin is connected to the normally open contact of the second double-position microswitch through an inner conductor wire and then connected to the opening + terminal block; the 14th female pin is connected to the opening - terminal block through an inner conductor wire; the 30th female pin is connected to the normally closed contact of the second double-position microswitch through an inner conductor wire and then connected to the opening + terminal block; the 31st female pin is connected to the opening - terminal block through an inner conductor wire; the 2nd female pin is connected to the normally open contact of the third double-position microswitch through an inner conductor wire and then connected to the energy storage + terminal block; the 12th female pin is connected to the energy storage - terminal block through an inner conductor wire; the 25th female pin is connected to the normally closed contact of the third double-position microswitch through an inner conductor wire and then connected to the energy storage + terminal block; the 35th female pin is connected to the energy storage - terminal block through an inner conductor wire.

[0012] Further, the main body of the junction box is of a hollow structure, and a junction box opening is provided thereon, and the cover plate is covered on the junction box opening; a cover plate buckle is provided on the cover plate, and a card slot is correspondingly provided on the main body of the junction box to cooperate with the cover plate buckle to tightly fasten the cover plate on the main body of the junction box.

[0013] Compared with the prior art, the present utility model has the following beneficial effects: The present utility model provides a dynamic characteristic test junction box for a 10 kV draw-out switch. The device has a simple and compact structure, a small volume and weight, and high portability; at the same time, through the wiring of the female pins and the terminal blocks in the junction box, it can be conveniently connected to the draw-out switch for dynamic characteristic tests; in addition, by switching the working state of the double-position microswitch through the gear selection knob, the dynamic characteristic tests of two types of draw-out switches can be switched. Therefore, the present utility model has strong practicability and broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a three-dimensional view of the junction box structure of an embodiment of the present utility model;

[0015] Figure 2 is a top view of the junction box structure of an embodiment of the present utility model;

[0016] Figure 3 It is the bottom view of the junction box structure of the embodiment of the present utility model;

[0017] Figure 4 It is the electrical wiring diagram of the junction box of the embodiment of the present utility model;

[0018] Figure 5 It is the electrical wiring diagram of the junction box of the embodiment of the present utility model in the first working state;

[0019] Figure 6 It is the electrical wiring diagram of the junction box of the embodiment of the present utility model in the second working state. Detailed implementation manners

[0020] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0021] It should be noted that the following detailed description is exemplary and is intended to provide further description of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0022] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary implementation manners according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0023] As Figures 1-3 shown, this embodiment provides a 10kV draw-out switch dynamic characteristic test junction box, which includes a junction box main body 1, a cover plate 2, a gear selection knob 3, 3 double-position microswitches, 6 terminal posts 4, and a plurality of female pins 5 adapted to the pins (male pins) of the aviation plug. The cover plate 2 is covered on the junction box main body 1. The 3 double-position microswitches are arranged in the junction box main body 1. Each double-position microswitch has a pair of normally open contacts and a pair of normally closed contacts. A plurality of aviation plug pin holes are formed on the junction box main body 1. The plurality of female pins 5 are arranged in the junction box main body 1 and are respectively installed on the corresponding aviation plug pin holes. 6 terminal post holes are formed on the cover plate 2. The 6 terminal posts 4 are respectively installed on the corresponding terminal post holes. The plurality of female pins 5 are respectively connected to the corresponding terminal posts 4 and the normally open and normally closed contacts through signal transmission wires. The gear selection knob 3 is installed on the junction box main body 1 and is in rotational contact with the 3 double-position microswitches to simultaneously switch the working states of the 3 double-position microswitches.

[0024] In this embodiment, the junction box body 1 has a hollow structure with a space for placing 3 microswitches, and a junction box opening is provided thereon. The cover plate 2 is covered on the junction box opening. The cover plate 2 is provided with a cover plate buckle 6, and a clamping groove 7 is correspondingly arranged on the junction box body 1 to cooperate with the cover plate buckle 6 to tightly fasten the cover plate 2 on the junction box body 1. The junction box body is designed and modeled with reference to the style of an aviation plug and then printed out by 3D printing technology.

[0025] In this embodiment, the signal transmission wire is made of soft copper wire.

[0026] As Figure 2 shown, the 6 terminal posts are the closing + terminal post, the closing - terminal post, the opening - closing + terminal post, the opening - closing - terminal post, the energy storage + terminal post, and the energy storage - terminal post.

[0027] As Figure 3 shown, the junction box includes 10 female pins. 10 aviation pin holes are provided on the junction box body 1, and the 10 female pins are respectively installed in the corresponding aviation pin holes. The 10 female pins are the second female pin, the third female pin, the fourth female pin, the twelfth female pin, the thirteenth female pin, the fourteenth female pin, the twenty - fifth female pin, the thirtieth female pin, the thirty - first female pin, and the thirty - fifth female pin. The fourth female pin and the fourteenth female pin are the common female pins for the dynamic characteristic tests of two types of handcart switches.

[0028] The pin numbers of the closing, opening - closing, and energy storage circuits of different handcart switch models are different and can be divided into two categories. However, there is 1 pair of repeated aviation plug pins used in the tests of two different types of handcart switches. Therefore, this device is designed with 10 aviation pin holes and 10 female pins, which can meet the requirements of 6 pins for two different handcart switch models. At the same time, this device is designed with 3 double - position microswitches connected in the circuit, and a selection knob is used to switch the working states of the 3 double - position microswitches, so that the gear of the junction box can be switched according to the models of the two types of handcart switches, realizing the universality of different types of switches. The corresponding table of the two gears of the junction box and the switch models is shown in Table 1.

[0029] Table 1 Corresponding table of gear and switch model

[0030]

[0031] Among them, the double - position microswitch, the pin, and the terminal post are all well - known technologies in the art and will not be further described here.

[0032] As Figures 4-6As shown, the 3rd mother pin is connected to the normally open contact of the first double-position microswitch SB1 through an internal wire and then connected to the closing + terminal block. The 13th mother pin is connected to the closing - terminal block through an internal wire. The 4th mother pin is connected to the normally closed contact of the first double-position microswitch SB1 through an internal wire and then connected to the closing + terminal block. The 14th mother pin is connected to the closing - terminal block through an internal wire. The 4th mother pin is connected to the normally open contact of the second double-position microswitch SB2 through an internal wire and then connected to the opening + terminal block. The 14th mother pin is connected to the opening - terminal block through an internal wire. The 30th mother pin is connected to the normally closed contact of the second double-position microswitch SB2 through an internal wire and then connected to the opening + terminal block. The 31st mother pin is connected to the opening - terminal block through an internal wire. The 2nd mother pin is connected to the normally open contact of the third double-position microswitch SB3 through an internal wire and then connected to the energy storage + terminal block. The 12th mother pin is connected to the energy storage - terminal block through an internal wire. The 25th mother pin is connected to the normally closed contact of the third double-position microswitch SB3 through an internal wire and then connected to the energy storage + terminal block. The 35th mother pin is connected to the energy storage - terminal block through an internal wire. The selectable knob SW1 switches the working states of the 3 double-position microswitches. Figures 4-6 The symbol meanings of the electrical components in it are shown in Table 2.

[0033] Table 2 Symbol Meanings of Electrical Symbols

[0034]

[0035] As mentioned above, it is only the preferred embodiment of the present invention, and it is not a limitation to the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes. However, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution content of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A dynamic characteristic test junction box for a 10 kV draw-out switch, characterized in that, It includes a junction box body, a cover plate, a gear selection knob, 3 double-position microswitches, 6 terminal posts, and multiple female pins adapted to male pins of an aviation plug. The cover plate is covered on the junction box body. The 3 double-position microswitches are arranged in the junction box body. Each double-position microswitch has a pair of normally open contacts and a pair of normally closed contacts. Multiple aviation pin holes are formed on the junction box body. The multiple female pins are arranged in the junction box body and are respectively installed on corresponding aviation pin holes. 6 terminal post holes are formed on the cover plate. The 6 terminal posts are respectively installed on corresponding terminal post holes. The multiple female pins are respectively connected to corresponding terminal posts and normally open and normally closed contacts through wires. The gear selection knob is installed on the junction box body and is in rotational contact with the 3 double-position microswitches to simultaneously switch the working states of the 3 double-position microswitches.

2. The wiring box for the dynamic characteristic test of a 10 kV draw-out switch according to claim 1, characterized in that, The 6 terminal posts are a closing + terminal post, a closing - terminal post, a tripping + terminal post, a tripping - terminal post, an energizing + terminal post, and an energizing - terminal post.

3. The wiring box for the dynamic characteristic test of the 10kV handcart switch according to claim 2, wherein It includes 10 female pins. 10 aviation pin holes are formed on the junction box body. The 10 female pins are respectively installed on corresponding aviation pin holes.

4. A wiring box for the dynamic characteristic test of a 10 kV handcart switch according to claim 3, characterized in that, The 10 female pins are a second female pin, a third female pin, a fourth female pin, a twelfth female pin, a thirteenth female pin, a fourteenth female pin, a twenty-fifth female pin, a thirtieth female pin, a thirty-first female pin, and a thirty-fifth female pin. The fourth female pin and the fourteenth female pin are common female pins for dynamic characteristic tests of two types of handcart switches.

5. A wiring box for dynamic characteristic test of 10kV handcart switch according to claim 4, characterized in that The third female pin is connected inward through a wire to the normally open contact of the first double-position microswitch and then connected to the closing + terminal post. The thirteenth female pin is connected inward through a wire to the closing - terminal post. The fourth female pin is connected inward through a wire to the normally closed contact of the first double-position microswitch and then connected to the closing + terminal post. The fourteenth female pin is connected inward through a wire to the closing - terminal post. The fourth female pin is connected inward through a wire to the normally open contact of the second double-position microswitch and then connected to the tripping + terminal post. The fourteenth female pin is connected inward through a wire to the tripping - terminal post. The thirtieth female pin is connected inward through a wire to the normally closed contact of the second double-position microswitch and then connected to the tripping + terminal post. The thirty-first female pin is connected inward through a wire to the tripping - terminal post. The second female pin is connected inward through a wire to the normally open contact of the third double-position microswitch and then connected to the energizing + terminal post. The twelfth female pin is connected inward through a wire to the energizing - terminal post. The twenty-fifth female pin is connected inward through a wire to the normally closed contact of the third double-position microswitch and then connected to the energizing + terminal post. The thirty-fifth female pin is connected inward through a wire to the energizing - terminal post.

6. The wiring box for the dynamic characteristic test of a 10 kV handcart switch according to claim 1, wherein, The junction box body is of a hollow structure and has a junction box opening formed thereon. The cover plate is covered on the junction box opening. The cover plate is provided with cover plate buckles. Corresponding slots are provided on the junction box body to cooperate with the cover plate buckles to tightly fasten the cover plate on the junction box body.

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