Primary contact system for drawer type switch cabinet

Abstract

The invention provides a primary contact system for a drawer type switch cabinet. The primary contact system comprises a contact connector, a locking assembly and a primary contact pin. The contact connector is provided with a first clamping head and a second clamping head. The locking assembly is used for locking clamping connection between a first clamping head of the contact connector and a vertical bus of the drawer type switch cabinet, the first clamping head is electrically connected with the vertical bus in a clamping mode in the first direction, the vertical bus extends in the second direction, and the first direction is perpendicular to the second direction. The primary pin is electrically connected with the contact connector, and the second chuck of the contact connector is in clamping connection with the first end of the primary pin. According to the invention, components used in the contact system can be replaced conveniently, quickly and flexibly. The contact connector is fixedly connected with the vertical bus by using the locking assembly, so that the vertical bus cannot be abraded, and the vertical bus can be maintenance-free. Meanwhile, the device can be suitable for drawer units with various different current specifications, and is flexible and convenient.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of electric power engineering, and particularly relates to a primary contact system for a drawer type switch cabinet and a drawer type switch cabinet comprising the same. BACKGROUND

[0002] The low-voltage drawer type switch cabinet (i.e. low-voltage drawer cabinet) is a commonly used low-voltage switch device in the field of electric power engineering, which is mainly used in low-voltage power distribution systems to complete the control, protection, conversion and distribution of electric energy. The low-voltage drawer cabinet is usually composed of multiple independent drawer units, each of which can be independently operated. At present, the low-voltage drawer cabinet has been widely used in power plants, building construction, semiconductors, data centers and other fields.

[0003] The primary contact system is a key component of the low-voltage drawer cabinet. The conventional primary contact system is fixedly installed on the drawer unit in an integrated structure, which has the disadvantage that the primary contact (or primary pin) is inconvenient to replace, install and maintain. Since the vertical bus and the primary contact are in sliding connection, when the drawer unit moves, the primary contact will move relative to the vertical bus, resulting in wear of the two, which reduces the contact reliability, increases the temperature rise, and causes the interphase insulation to fail and burn out the vertical bus. SUMMARY

[0004] According to a first aspect of the present application, a primary contact system for a drawer type switch cabinet is provided, comprising: a contact connector having a first clamp head and a second clamp head; a locking assembly for locking the clamping connection between the first clamp head of the contact connector and a vertical bus of the drawer type switch cabinet, wherein the first clamp head clamps and connects the vertical bus in a first direction, the vertical bus extends in a second direction, and the first direction is perpendicular to the second direction; and a primary pin electrically connected with the contact connector, the second clamp head of the contact connector being clamped and connected with a first end of the primary pin.

[0005] Preferably, the clamping connection between the second clamp head of the contact connector and the first end of the primary pin has a first release force, and the clamping connection between the first clamp head of the contact connector and the vertical bus has a second release force, the first release force being smaller than the second release force.

[0006] Preferably, one side of the locking assembly is provided with a plurality of concave grooves, and the plurality of vertical buses are clamped by the plurality of concave grooves to arrange the vertical buses on a first cabinet plate of the drawer type switch cabinet and constrain the positions of the vertical buses on the first cabinet plate.

[0007] Preferably, the other side of the locking component is provided with a plurality of plug holes, each plug hole being provided with a snap-fit ​​structure for use with the contact connector; the first clamp of the contact connector passes through the plug hole and is connected to the locking component by means of the snap-fit ​​structure; after the first clamp of the contact connector passes through the plug hole, it clamps the vertical busbar.

[0008] Preferably, a snap-fit ​​structure for use with the insertion hole is provided in the middle part of the contact connector between the first clamp and the second clamp.

[0009] Preferably, the first clamp is composed of a first clamping arm and a second clamping arm, and a snap-fit ​​structure that cooperates with the insertion hole is provided on the outer side of the first clamping arm and the second clamping arm.

[0010] Preferably, the first clamp is composed of a first clamping arm and a second clamping arm, and the outer sides of the first clamping arm and the second clamping arm are provided with protrusions; the other side of the locking assembly is provided with a plurality of plug holes, the first clamp of the contact connector passes through the plug holes and clamps the vertical busbar, and the protrusions are locked on the outer edge of the opening of the plug holes, so as to realize the connection between the contact connector and the locking assembly.

[0011] Preferably, the locking component is a vertical busbar clamp.

[0012] Preferably, it further includes a pin mounting base, the second end of the primary pin being connected to the pin mounting base; the pin mounting base is disposed on the second cabinet plate of the drawer-type switch cabinet; wherein, the first cabinet plate and the second cabinet plate move relative to each other along the drawer track direction.

[0013] According to a second aspect of the present invention, a drawer-type switch cabinet is provided, comprising a primary contact system for a drawer-type switch cabinet as described in any of the first aspects.

[0014] Compared with existing technologies, this invention provides a modular, split-type primary contact system design, allowing for convenient, quick, and flexible replacement of components used in the contact system. By using a locking assembly to securely connect the contact connector to the vertical busbar, wear on the vertical busbar is prevented, making the vertical busbar maintenance-free. By adjusting the number of contact connectors and corresponding pins, it can be adapted to drawer units with various current specifications, offering flexibility and convenience. Attached Figure Description

[0015] The embodiments of the present invention will be further described below with reference to the accompanying drawings, wherein: Figure 1 This is a structural disassembly diagram of a primary contact system according to an embodiment of the present invention.

[0016] Figure 2 is a schematic diagram of a locking assembly and vertical busbar connection structure according to an embodiment of the present application.

[0017] Figure 3 is a schematic diagram of a locking assembly and contact plug connection structure according to an embodiment of the present application.

[0018] Figure 4 is a schematic diagram of a cross section of an assembled primary contact system according to an embodiment of the present application.

[0019] Figure 5 is a schematic diagram of the structural relationship between a drawer unit and a primary contact system according to an embodiment of the present application. DETAILED DESCRIPTION

[0020] For the purpose of the present application, the technical solutions and advantages are more clearly and explicitly described below, which are further described in detail by specific embodiments in combination with the drawings, wherein the same reference signs represent the same components in each of the drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0021] A low-voltage drawer cabinet is a highly modular and flexible low-voltage switchgear that is widely used in the field of electrical engineering. The main structural components of the low-voltage drawer cabinet will be introduced below. The low-voltage drawer cabinet mainly includes a cabinet body, a busbar, an instrument, a contact system, a drawer unit, etc. Among them, the cabinet body serves as the shell framework of the switchgear and the internal mounting and supporting components. The cabinet body is usually assembled from C-shaped steel materials, and all structural components are galvanized to improve corrosion resistance. The busbar is divided into horizontal and vertical busbars, which are low-impedance conductors that connect circuits. The horizontal busbar is used to connect the distribution busbar or the incoming and outgoing line units. The vertical busbar is connected to the horizontal busbar and supplies power to the instrument, contact system, etc. The drawer unit is the core part of the low-voltage drawer cabinet, which can be operated independently and has different size series. The contact system is a key component of the drawer cabinet, mainly responsible for the transmission and distribution of electrical energy. The quality of the contact (or primary contact) is a key quality control point of the low-voltage drawer cabinet. Due to design, installation, maintenance, etc., drawer contact burnout may occur in the field, affecting continuous operation. Currently, the vertical busbar clamp and the contact plug are designed as an integrated type, and the primary contact is connected to the vertical busbar in a sliding manner. In actual application, the inventors found that the integrated design is not conducive to the replacement and maintenance of components, and cannot be expanded to multiple current specifications of the drawer scheme. When the drawer unit moves from the working position to the test or separation position, or from the test or separation position to the working position, the primary contact moves relative to the vertical busbar, causing wear between the two, which reduces the contact reliability, increases the temperature rise, and in severe cases, may damage the mechanical and electrical properties of the insulation around the contact, leading to interphase insulation failure and burning of the vertical busbar, which requires replacement of the vertical busbar and other components.

[0022] To solve the above problems, the embodiment of the present application provides a design of a split modular one-time contact system, which can conveniently and quickly replace the components used in the contact system. The contact connector is fixedly connected with the vertical bus by using the locking assembly, which does not cause wear of the vertical bus, and the vertical bus can be maintained free of maintenance. By adjusting the number of the contact connector and the corresponding pin, the drawer unit of various current specifications can be applied flexibly and conveniently.

[0023] Figure 1 is a structure disassembly schematic diagram of a one-time contact system according to the embodiment of the present application. As shown in Figure 1 the embodiment of the present application provides a one-time contact system, which comprises a contact connector 101, a locking assembly 103 and a one-time pin 104. The contact connector 101 has a first clamp 1011 and a second clamp 1012. The structures of the first clamp 1011 and the second clamp 1012 can be the same or different. The first clamp 1011 of the contact connector 101 is clamped and connected with the vertical bus 102 of the drawer cabinet. The locking assembly 103 locks the clamped connection of the first clamp 1011 and the vertical bus 102. The first clamp is electrically clamped and connected with the vertical bus in a first direction, the vertical bus extends in a second direction, and the first direction is perpendicular to the second direction. The second clamp 1012 of the contact connector 101 is clamped and connected with the first end of the one-time pin 104. The split modular design can conveniently and quickly replace the components in the contact system. By using the locking assembly to lock the clamped connection between the contact connector and the vertical bus, the relative movement between the clamp and the vertical bus due to the sliding connection can be avoided, so as to prevent the wear of the vertical bus. By adjusting the number of the contact connector and the corresponding pin, the drawer unit of various current specifications can be applied flexibly and conveniently. The structures of the first clamp and the second clamp are the same, which can make the structure of the contact connector simpler, simplify the manufacturing process of the contact connector, and reduce the manufacturing cost.

[0024] In some embodiments, the clamped connection between the second clamp 1012 of the contact connector 101 and the first end of the one-time pin 104 has a first release force, and the clamped connection between the first clamp 1011 of the contact connector 101 and the vertical bus 102 has a second release force, and the first release force is less than the second release force. In this way, the contact connector and the one-time pin can be separated while ensuring that the contact connector and the vertical bus do not separate, avoiding the wear of the vertical bus caused by the friction force between the clamp and the vertical bus when separating, ensuring the reliability of the contact between the clamp and the vertical bus, stabilizing the temperature rise, and avoiding the damage of the mechanical and electrical properties of the insulation around the contact.

[0025] Figure 2 is a locking assembly and vertical bus connection structure schematic diagram according to the embodiment of the present application. As shown inFigure 2 As shown in some embodiments, one side of the locking assembly 103 is provided with a plurality of recessed slots 1031, each of which can hold one vertical busbar 102, and the plurality of vertical busbars 102 are arranged on the first cabinet plate (not shown in the figure) of the drawer switch cabinet and constrain the position of the vertical busbar 102 on the first cabinet plate. This can avoid the deformation or displacement of the vertical busbar that may occur in work. Figure 2

[0026] Figure 3 Figure 4 is a schematic diagram of the connection structure of the locking assembly and the contact plug according to an embodiment of the present application. Figure 4 Figure 5 is a schematic diagram of the cross section of the assembled single contact system according to an embodiment of the present application. As shown in Figure 3 and Figure 4 As shown in some embodiments, the other side of the locking assembly 103 is provided with a plurality of plug holes 1032, and each plug hole 1032 is provided with a buckle structure for cooperating with the contact plug 101, that is, the contact plug 101 is also provided with a corresponding buckle structure. The first clamp head 1011 of the contact plug 101 passes through the plug hole 1032 and is fixedly connected to the locking assembly 103 by the buckle structure. After the first clamp head 1011 of the contact plug 101 passes through the plug hole 1032, it clamps the vertical busbar 102. The buckle structure can lock the clamping connection between the contact plug and the vertical busbar, so that the clamp head and the vertical busbar cannot easily come off. Regarding the arrangement of the buckle structure, in some embodiments, the outer side of the middle part of the contact plug between the first clamp head 1011 and the second clamp head 1012 is provided with a buckle structure for cooperating with the plug hole 1032. In some embodiments, the first clamp head 1011 is composed of a first clamp arm and a second clamp arm, and the outer side of the first clamp arm and the second clamp arm is provided with a buckle structure for cooperating with the plug hole.

[0027] In some embodiments, a protruding piece is arranged on the outer side of the first clamp arm and the second clamp arm. After the first clamp head 1011 of the contact plug 101 passes through the plug hole 1032, it clamps the vertical busbar 102 and the protruding piece is clamped on the outer edge of the opening of the plug hole 1032. By clamping the outer side of the first clamp arm and the second clamp arm on the outer edge of the opening of the plug hole, the contact plug is connected to the locking assembly, so that the clamp head and the vertical busbar cannot easily come off.

[0028] In some embodiments, the plurality of plug holes 1032 of the locking assembly 103 are arranged along the horizontal direction of the locking assembly, and each column is provided with one or more plug holes 1032. Arranging a plurality of plug holes in the same longitudinal direction can realize the staggered arrangement of the contact plug and improve the space utilization rate in the drawer cabinet. At the same time, a plurality of contact plugs can be installed and expanded to a higher current drawer unit.

[0029] ​In some embodiments, the locking assembly 103 is a vertical busbar clamp.

[0030] Figure 5 is a schematic diagram of the structural relationship between the drawer unit and the primary contact system according to an embodiment of the present application. As shown in Figure 5 some embodiments, the primary contact system further includes a pin mounting seat 105, and the second end of the primary pin 104 is connected to the pin mounting seat 105. With reference to Figure 5 , in some embodiments, the pin mounting seat 105 is arranged on the second cabinet plate 202 of the drawer-type switchgear. The first cabinet plate 201 and the second cabinet plate 202 move relative to each other along the drawer rail direction. When the drawer unit is pushed to the working position, the primary pin 104 is connected to the second clamp 1012 of the contact connector 101. The primary pin is fixedly installed on the insulating seat as a whole on the drawer unit, and is used to connect the circuit breaker incoming and outgoing line cables or busbars.

[0031] In some embodiments, the number of contact connectors is set according to the number of primary pins. By adjusting the number of contact connectors and corresponding pins, the drawer unit can be applied to various current specifications, which is flexible and convenient.

[0032] In the embodiments of the present application, the contact connector and the primary pin are both modularly designed, which is easy to install and maintain. The contact connector and the vertical busbar are fixedly connected by the locking assembly, which ensures that the clamp of the contact connector will not wear the vertical busbar when the drawer unit is pulled in and pulled out, and the vertical busbar can be maintained free of maintenance. By increasing the number of contact connectors and primary pins, the drawer unit can be expanded to various current specifications (15A-630A).

[0033] Based on the above embodiments, the embodiments of the present application further provide a drawer-type switchgear, which includes the primary contact system of any one of the above embodiments.

[0034] Although the present application has been described by preferred embodiments, the present application is not limited to the embodiments described herein, and includes various changes and variations made without departing from the scope of the present application.

Claims

1. A primary contact system for a drawer-type switchgear, characterized in that, comprising a contact connector having a first clamp head and a second clamp head; a locking assembly for locking a clamping connection between the first clamp head of the contact connector and a vertical busbar of the drawer-type switchgear, wherein the first clamp head electrically clamps the vertical busbar in a first direction, the vertical busbar extends in a second direction, and the first direction is perpendicular to the second direction; and a primary pin electrically connected with the contact connector, a first end of the primary pin is clamped by the second clamp head of the contact connector.

2. The single contact system of claim 1, wherein, The clamping connection between the second clamp head of the contact connector and the first end of the primary pin has a first release force, and the clamping connection between the first clamp head of the contact connector and the vertical busbar has a second release force, the first release force being less than the second release force.

3. The single contact system of claim 1, wherein, A side of the locking assembly is provided with a plurality of recessed grooves, and the plurality of recessed grooves are used to clamp the plurality of vertical busbars to arrange the vertical busbars on a first cabinet plate of the drawer-type switchgear and constrain the positions of the vertical busbars on the first cabinet plate.

4. The single contact system of claim 3, wherein, The other side of the locking assembly is provided with a plurality of connector holes, and each connector hole is provided with a buckle structure used in cooperation with the contact connector; The first clamp head of the contact connector passes through the connector hole and is connected with the locking assembly by using the buckle structure; After the first clamp head of the contact connector passes through the connector hole, the vertical busbar is clamped.

5. The single contact system of claim 4, wherein, A buckle structure used in cooperation with the connector hole is arranged at a middle part of the contact connector between the first clamp head and the second clamp head.

6. The single contact system of claim 4, wherein, The first clamp head is composed of a first clamp arm and a second clamp arm, and a buckle structure used in cooperation with the connector hole is arranged on the outer side of the first clamp arm and the second clamp arm.

7. The single contact system of claim 3, wherein, The first clamp head is composed of a first clamp arm and a second clamp arm, and a protruding piece is arranged on the outer side of the first clamp arm and the second clamp arm. The other side of the locking assembly is provided with a plurality of connector holes, and the first clamp head of the contact connector clamps the vertical busbar after passing through the connector hole and clamps the protruding piece on the outer edge of the opening of the connector hole to realize the connection between the contact connector and the locking assembly.

8. The system of any one of claims 1-7, wherein, The locking assembly is a vertical busbar clamp.

9. The system of any one of claim 1, wherein, A pin mounting seat is further included, and a second end of the primary pin is connected with the pin mounting seat; The pin mounting seat is arranged on a second cabinet plate of the drawer-type switchgear; The first cabinet plate and the second cabinet plate move relative to each other in the direction of the drawer track.

10. A drawer-type switchgear cabinet, characterized by The primary contact system for the drawer-type switchgear includes any one of claims 1-9.

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