Automatic bypass cabinet with side-mounted disconnecting link

Abstract

The utility model discloses an automatic bypass cabinet with a side-mounted disconnecting link. The automatic bypass cabinet comprises a cabinet body, the disconnecting link and a contactor. A knife lock chamber and a contactor chamber are arranged in front of and behind the cabinet body respectively, at least one knife switch is arranged in the knife lock chamber and laterally mounted in the knife lock chamber, the knife switch is provided with a knife switch rotating shaft, a knife switch handle operation hole is formed in a knife lock gate axially opposite to the knife switch rotating shaft, at least a KM3 contactor is arranged in the contactor chamber, and the contactor chamber is arranged in front of the cabinet. A cable or a copper bar is connected between the disconnecting link and the contactor, an insulating partition plate is arranged at the position where the connecting copper bar passes through a cross beam of the cabinet body, a set of wire inlet and outlet holes are formed in the bottom of the cabinet body, and a set of wire inlet and outlet holes are formed in the cabinet top right opposite to the wire inlet and outlet holes in the bottom. The incoming and outgoing lines of the bypass cabinet are arranged behind the cabinet, so that wiring is convenient; the width of the cabinet body is compressed, the depth space is utilized, and the cabinet body volume is reduced; the connection points are short in path, and cost is reduced.

Description

Technical Field

[0001] The utility model relates to an automatic bypass cabinet with side-mounted knife switches, and particularly relates to the field of frequency converters. Background Art

[0002] For the convenience of high-voltage frequency converter testing and maintenance, an automatic bypass cabinet needs to be added to the high-voltage frequency converter to enable the load to operate at power frequency or frequency conversion. The existing automatic bypass cabinet with a contactor is controlled by the contactor control circuit for opening and closing, without an obviously visible opening and closing point, and has low reliability; the automatic bypass cabinet with a knife switch and a contactor installs the knife switch and the contactor facing the front of the cabinet, with a wide width dimension of the cabinet body, large volume and floor area, and high civil engineering and equipment costs. Content of the Utility Model

[0003] To solve the above existing problems, the utility model provides an automatic bypass cabinet with side-mounted knife switches, which is provided with knife switches and contactors. Knife switches are added at both ends of the high-voltage frequency converter in the frequency conversion circuit as mechanical opening and closing points, and the opening and closing state of the circuit is visible, with high reliability; QS1 knife switch and QS2 knife switch are arranged up and down and are side-mounted in the knife switch chamber; KM1 contactor, KM2 contactor, and KM3 contactor are arranged up and down and are arranged facing the front of the cabinet in the contactor chamber, with KM3 contactor in the middle. The width dimension of the cabinet body is determined by the width dimension of the contactor, and the width dimension of the automatic bypass cabinet is narrow and the cost is low.

[0004] To achieve the above object, the utility model provides the following technical solutions:

[0005] An automatic bypass cabinet with side-mounted knife switches includes a cabinet body, knife switches, and contactors. A knife switch chamber and a contactor chamber are respectively arranged in the front and back of the cabinet body; at least one knife switch is arranged in the knife switch chamber, and the knife switch is side-mounted in the knife switch chamber; at least KM3 contactor is arranged in the contactor chamber, and the contactor is arranged facing the front of the cabinet in the contactor chamber.

[0006] Further, QS1 knife switch is arranged in the knife switch chamber; or QS2 knife switch is arranged in the knife switch chamber; or both QS1 knife switch and QS2 knife switch are arranged in the knife switch chamber.

[0007] Further, KM3 contactor is arranged in the contactor chamber; or KM1 contactor and KM3 contactor are arranged in the contactor chamber; or KM2 contactor and KM3 contactor are arranged in the contactor chamber; or KM1 contactor, KM2 contactor, and KM3 contactor are arranged in the contactor chamber.

[0008] Further, QS1 knife switch and QS2 knife switch are arranged up and down, KM1 contactor, KM2 contactor, and KM3 contactor are arranged up and down, and KM3 contactor is in the middle.

[0009] Further, the QS1 knife switch and the KM1 contactor are arranged above, and the QS2 knife switch and the KM2 contactor are arranged below; or the QS1 knife switch and the KM1 contactor are arranged below, and the QS2 knife switch and the KM2 contactor are arranged above.

[0010] Further, the connections between the knife switch, the contactor, and the frequency converter are made of cables or copper bars; an insulating partition is provided at the crossbeam of the cabinet body through which the connecting copper bar passes.

[0011] Further, the cabinet body is provided with a control box, and secondary devices are provided on the control box.

[0012] Further, the QS1 knife switch is provided with a QS1 knife switch rotating shaft, and the QS2 knife switch is provided with a QS2 knife switch rotating shaft.

[0013] Further, the cabinet body is provided with a control door and a knife gate; the knife gate is provided with a cabinet door electromagnetic lock, a lighting lamp, an observation window, and an operation hole electromagnetic lock, and a knife switch handle operation hole is provided on the knife gate axially opposite to the rotating shaft of the knife switch.

[0014] Further, a set of inlet and outlet holes are provided at the bottom of the cabinet body, and a set of inlet and outlet holes are also provided at the top of the cabinet opposite to the bottom inlet and outlet holes, and inlet and outlet sealing plates are provided.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] 1. The whole of the present utility model is provided with at least one knife switch and at least one KM3 contactor. The knife switch serves as a mechanical switching point, and the on-off state of the circuit is visible, with high reliability;

[0017] 2. The QS1 knife switch and the QS2 knife switch are arranged vertically and installed on the side in the knife switch chamber; the KM1 contactor, the KM2 contactor, and the KM3 contactor are arranged vertically and face the front of the cabinet in the contactor chamber. The KM3 contactor is arranged in the middle. The width dimension of the cabinet body is determined by the width dimension of the contactor. The width dimension of the automatic bypass cabinet is narrow, with a small volume and floor area, and low civil engineering and equipment costs. Description of the Drawings

[0018] Figure 1 It is a schematic diagram of an automatic bypass cabinet with a side-mounted knife switch provided by the present utility model;

[0019] Figure 2 It is a three-dimensional view of an automatic bypass cabinet with a side-mounted knife switch provided by the present utility model;

[0020] Figure 3 It is a front view of an automatic bypass cabinet with a side-mounted knife switch provided by the present utility model;

[0021] Figure 4 It is a three-dimensional view of the arrangement mode 1 of the knife switch and the contactor of an automatic bypass cabinet with a side-mounted knife switch provided by the present utility model;

[0022] Figure 5 A three-dimensional view of the arrangement mode II of the knife switch and contactor of an automatic bypass cabinet with the knife switch installed on the side provided by the present utility model;

[0023] Figure 6 A right view of the hidden side plate of the arrangement mode I of the knife switch and contactor of an automatic bypass cabinet with the knife switch installed on the side provided by the present utility model;

[0024] Figure 7 A top view of the hidden top plate of an automatic bypass cabinet with the knife switch installed on the side provided by the present utility model.

[0025] In the figure: cabinet body 100, knife switch chamber 110, contactor chamber 111, incoming and outgoing line sealing plate 120, control door 121, knife gate door 122, cabinet door electromagnetic lock 1221, control box 123, secondary device 130, QS1 knife switch 131, QS1 knife switch rotating shaft 1311, QS2 knife switch 132, QS2 knife switch rotating shaft 1321, KM1 contactor 133, KM3 contactor 134, KM2 contactor 135, lighting lamp 136, observation window 137, insulating partition 138, knife switch handle operation hole 140, operation hole electromagnetic lock 1401, incoming and outgoing line hole 141. Specific implementation manners

[0026] The present utility model will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0027] As Figure 1 shown, one end of the QS1 knife switch 131 is connected to one end of the KM1 contactor 133, and the other end of the QS1 knife switch 131 is connected to the input end of the frequency converter; one end of the QS2 knife switch 132 is connected to one end of the KM2 contactor 135, and the other end of the QS2 knife switch 132 is connected to the output end of the frequency converter; one end of the KM3 contactor 134 is connected to the other end of the KM1 contactor 133, and the other end of the KM3 contactor 134 is connected to the other end of the KM2 contactor 135.

[0028] As Figures 4 - 7 shown, the present utility model provides an automatic bypass cabinet with the knife switch installed on the side, including a cabinet body 100, a knife switch, and a contactor. The front and rear of the cabinet body 100 are respectively provided with a knife switch chamber 110 and a contactor chamber 111; at least one knife switch is provided in the knife switch chamber 110, and the knife switch is installed on the side in the knife switch chamber 110; at least the KM3 contactor 134 is provided in the contactor chamber 111, and the contactor is arranged facing the front of the cabinet in the contactor chamber 111. The width dimension of the cabinet body 100 is set to the minimum width dimension capable of accommodating the contactor, and the width dimension of the cabinet is narrower.

[0029] The QS1 knife switch 131 is provided in the knife switch chamber 110; or the QS2 knife switch 132 is provided in the knife switch chamber 110; or both the QS1 knife switch 131 and the QS2 knife switch 132 are provided in the knife switch chamber 110.

[0030] Inside the contactor chamber 111, there is a KM3 contactor 134; or inside the contactor chamber 111, there are a KM1 contactor 133 and a KM3 contactor 134; or inside the contactor chamber 111, there are a KM2 contactor 135 and a KM3 contactor 134; or inside the contactor chamber 111, there are a KM1 contactor 133, a KM2 contactor 135 and a KM3 contactor 134.

[0031] As Figure 4 、 Figure 5 shown, the QS1 knife switch 131 and the QS2 knife switch 132 are arranged vertically, the KM1 contactor 133, the KM2 contactor 135, and the KM3 contactor 134 are arranged vertically, and the KM3 contactor 134 is located in the middle.

[0032] The QS1 knife switch 131 and the KM1 contactor 133 are located above, and the QS2 knife switch 132 and the KM2 contactor 135 are located below; or the QS1 knife switch 131 and the KM1 contactor 133 are located below, and the QS2 knife switch 132 and the KM2 contactor 135 are located above.

[0033] As Figures 4 - 6 shown, the connections between the knife switch, the contactor, and the frequency converter are set as cables or copper bars, and an insulating partition 138 is provided at the crossbeam of the cabinet body 100 where the connecting copper bar passes through. Different voltage levels correspond to different electrical distances and insulation requirements, and the insulating partition 138 can strengthen insulation and ensure personal safety for some areas that do not meet the corresponding electrical distance and insulation requirements.

[0034] The cabinet body 100 is provided with a control box 123, and a secondary device 130 is provided on the control box 123. The secondary device 130 is separately integrated in the control box 123 to ensure the isolation between strong electricity and weak electricity, which is safe and reliable.

[0035] The QS1 knife switch 131 is provided with a QS1 knife switch rotating shaft 1311, and rotating the QS1 knife switch rotating shaft 1311 controls the opening and closing of the QS1 knife switch 131. The QS2 knife switch 132 is provided with a QS2 knife switch rotating shaft 1321, and rotating the QS2 knife switch rotating shaft 1321 controls the opening and closing of the QS2 knife switch 132.

[0036] As Figure 2 、 Figure 3 shown, the cabinet body 100 is provided with a control door 121 and a knife gate 122 installed by hinges. The control door 121 is used for testing and maintaining the weak electricity on the secondary side, and the knife gate 122 is used for testing and maintaining the strong electricity on the primary side.

[0037] The knife gate 122 is provided with a cabinet door electromagnetic lock 1221, a lighting lamp 136, an observation window 137, and an operating hole electromagnetic lock 1401. When the automatic bypass cabinet is energized, the cabinet door electromagnetic lock 1221 is in the closed state, and the knife gate 122 cannot be opened. When the lighting lamp 136 is turned on, the opening and closing state of the knife switch and the situation inside the cabinet can be observed through the observation window 137. On the knife gate 122 where the axial direction of the knife switch rotating shaft is directly opposite, there is a knife switch handle operating hole 140. The handle is used for operation outside the cabinet, and the knife switch rotating shaft is rotated through the knife switch handle operating hole 140 to control the opening and closing of the knife switch. When the knife switch handle operating hole 140 is opened, the operating hole electromagnetic lock 1401 is in the open state, and at this time, the contactor cannot be opened or closed. When the knife switch handle operating hole 140 is blocked by a baffle, the operating hole electromagnetic lock 1401 is in the closed state, and at this time, the contactor can be opened or closed.

[0038] As Figure 2 , Figure 4 shown, a set of inlet and outlet holes 141 are provided at the bottom of the cabinet body 100, and a set of inlet and outlet holes 141 are also provided at the cabinet top directly opposite the bottom inlet and outlet holes, and an inlet and outlet sealing plate 120 is provided. When the incoming line is from the bottom and the outgoing line is from the bottom, the inlet and outlet sealing plate 120 blocks the inlet and outlet holes 141 at the cabinet top; when the incoming line is from the top and the outgoing line is from the top, the inlet and outlet sealing plate 120 blocks the bottom inlet and outlet holes 141.

[0039] The whole of the present utility model is provided with at least one knife switch and at least one KM3 contactor. A knife switch is added at both ends of the high-voltage frequency converter in the frequency conversion circuit as a mechanical opening and closing point, the opening and closing state of the circuit is visible, and the reliability is high; the QS1 knife switch and the QS2 knife switch are arranged one above the other and are side-mounted in the knife switch chamber; the KM1 contactor, the KM2 contactor, and the KM3 contactor are arranged one above the other and are arranged facing the front of the cabinet in the contactor chamber. The KM3 contactor is arranged in the middle. The width dimension of the cabinet body is determined by the width dimension of the contactor. The width dimension of the automatic bypass cabinet is narrow, and the production cost is low.

[0040] The above are only the preferred implementation cases of the present utility model, rather than any form of limitation on the present utility model. Those skilled in the art can make several deformations and improvements on the basis of the above implementation cases, and these should all fall within the protection scope of the present utility model.

Claims

1. An automatic bypass cabinet with a knife switch mounted on the side, comprising a cabinet body (100), a knife switch, and a contactor, characterized in that: A switch chamber (110) and a contactor chamber (111) are respectively provided at the front and rear of the cabinet (100); At least one knife switch is provided in the knife switch chamber (110), and the knife switch is mounted on the knife switch chamber (110); At least a KM3 contactor (134) is arranged in the contactor chamber (111), and the contactor is arranged in the contactor chamber (111) facing the front of the cabinet.

2. The automatic bypass cabinet with knife switch side mounted according to claim 1, characterized in that: A QS1 knife switch (131) is arranged in the knife switch chamber (110); or a QS2 knife switch (132) is arranged in the knife switch chamber (110); or both the QS1 knife switch (131) and the QS2 knife switch (132) are arranged in the knife switch chamber (110).

3. The automatic bypass cabinet with knife switch side mounted according to claim 2 is characterized by: A KM3 contactor (134) is provided in the contactor chamber (111); or a KM1 contactor (133) and a KM3 contactor (134) are provided in the contactor chamber (111); or a KM2 contactor (135) and a KM3 contactor (134) are provided in the contactor chamber (111); or a KM1 contactor (133), a KM2 contactor (135) and a KM3 contactor (134) are provided in the contactor chamber (111).

4. The automatic bypass cabinet with knife switch side mounted according to claim 3 is characterized by: The QS1 knife switch (131) and the QS2 knife switch (132) are arranged up and down, the KM1 contactor (133), the KM2 contactor (135), and the KM3 contactor (134) are arranged up and down, and the KM3 contactor (134) is arranged in the middle.

5. The automatic bypass cabinet with knife switch side mounted according to claim 4 is characterized by: The QS1 knife switch (131) and the KM1 contactor (133) are arranged at the top, and the QS2 knife switch (132) and the KM2 contactor (135) are arranged at the bottom; or the QS1 knife switch (131) and the KM1 contactor (133) are arranged at the bottom, and the QS2 knife switch (132) and the KM2 contactor (135) are arranged at the top.

6. The automatic bypass cabinet with knife switch side mounted according to claim 1, characterized in that: A cable or a copper busbar is provided to connect the knife switch, the contactor, and the frequency converter; an insulating partition (138) is provided at the crossbeam of the cabinet (100) through which the copper busbar passes.

7. The automatic bypass cabinet with knife switch side mounted according to claim 1, characterized in that: The cabinet (100) is provided with a control box (123), and the control box (123) is provided with a secondary device (130).

8. The automatic bypass cabinet with knife switch side mounted according to claim 2, characterized in that: The QS1 knife switch (131) is provided with a QS1 knife switch rotating shaft (1311), and the QS2 knife switch (132) is provided with a QS2 knife switch rotating shaft (1321).

9. The automatic bypass cabinet with knife switch side mounted according to claim 8, characterized in that: The cabinet body is provided with a control door (121) and a knife gate door (122); the knife gate door (122) is provided with a cabinet door electromagnetic lock (1221), an illuminating lamp (136), an observation window (137), and an operating hole electromagnetic lock (1401); and a knife gate handle operating hole (140) is provided on the knife gate door (122) axially opposite to the knife gate rotating shaft.

10. The automatic bypass cabinet with knife switch side mounted according to claim 1, characterized in that: A group of inlet and outlet holes (141) are provided at the bottom of the cabinet body (100), and a group of inlet and outlet holes (141) are also provided at the top of the cabinet directly opposite to the inlet and outlet holes at the bottom, and an inlet and outlet sealing plate (120) is provided.

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