A special drawer switch and switch cabinet developed based on an extracted low-voltage switch cabinet

Abstract

This utility model discloses a dedicated drawer switch and switch cabinet developed based on a pull-out low-voltage switchgear, belonging to the field of power supply equipment. The drawer switch includes a drawer body, an input socket, a switch assembly, and a locking assembly. The input socket is located on the drawer panel and electrically connected to a disconnecting switch. The switch assembly includes an operating handle and a drive rod. The operating handle is rotatably mounted on the drawer panel and can rotate between an open and closed position. The operating handle drives the disconnecting switch via the drive rod. The locking assembly includes a connecting structure and a locking pin. A fixing hole is provided in the drawer compartment corresponding to the locking pin. The locking pin is connected to the drive rod via the connecting structure. When the operating handle is in the open position, the locking pin disengages from the fixing hole; when the operating handle is in the closed position, the locking pin is inserted into the fixing hole. The switch cabinet includes a drawer compartment, and the drawer compartment is equipped with the aforementioned drawer switch.

Description

Technical Field

[0001] This utility model relates to the field of power supply equipment, and in particular to a special type of drawer switch and switch cabinet developed based on a withdrawable low-voltage switch cabinet. Background Technology

[0002] When electrical control panels are being maintained during generator overhauls, if a load in the section cannot be de-energized, temporary power re-supply is required. The common practice is to find a spare drawer in an adjacent energized control panel, disconnect the load cable from the drawer switch's outgoing terminal, use a temporary cable, connect one end of the temporary cable to the load cable, and the other end to the outgoing terminal of the spare drawer in the adjacent control panel. The original drawer is then moved into the spare compartment to re-supply the load that cannot be de-energized. The disadvantages of this approach are: firstly, both the upper and lower drawers are energized when disconnecting the cables at the load cable terminals and the spare compartment's outgoing terminal, posing a high risk of electric shock; secondly, termination requires at least eight cable joints, resulting in a longer working time and increasing the temporary power outage time for loads that cannot be de-energized for extended periods. Existing technologies also disclose some drawers used for power re-supply.

[0003] For example, patent CN219041061U discloses a temporary power supply reconnection wiring drawer. Its features include a drawer body positioned between a busbar compartment and a feeder compartment. The drawer body is divided into front and rear compartments. Compartment one contains an industrial plug connector and a circuit breaker connector, which are connected to an industrial plug and a circuit breaker switch respectively via a partition. Compartment two contains a circuit breaker connected to a busbar connector via a partition. This patent requires a plug / socket box for reconnection, making the operation relatively complex.

[0004] The patent with authorization announcement number CN214379287U completely abandons the original drawers A and B when repowering, requiring two additional repower drawers to achieve repowering, which increases costs. Furthermore, this patent requires different configurations of the repower drawers for repowering different power and load types, resulting in poor adaptability. In addition, both repower drawers in this patent require circuit breakers, leading to a limited range of component combinations and low flexibility.

[0005] Therefore, there is an urgent need for an improved device to overcome the above-mentioned defects. Utility Model Content

[0006] The purpose of this utility model is to provide a special drawer switch and switch cabinet based on a withdrawable low-voltage switch cabinet, so as to solve the technical problem of low safety of special drawer switches based on withdrawable low-voltage switch cabinets in the prior art.

[0007] Based on the above concept, the technical solution adopted by this utility model is as follows:

[0008] On one hand, this utility model provides a special drawer switch developed based on a pull-out low-voltage switchgear, including a drawer body, the drawer body being slidably disposed in a drawer compartment, a drawer panel being disposed at the front of the drawer body, an isolating switch being disposed inside the drawer body, a connection terminal being disposed at the rear of the drawer body for electrical connection with the isolating switch, and a power supply terminal being disposed inside the drawer compartment for connection with the connection terminal. The drawer body includes:

[0009] An input socket is provided on the drawer panel and is electrically connected to the disconnect switch;

[0010] A switch assembly includes an operating handle and a drive rod. The operating handle is rotatably disposed on the drawer panel and can rotate between an open position and a closed position. The operating handle drives the disconnect switch via the drive rod, wherein the open position corresponds to the disconnect switch being open and the closed position corresponds to the disconnect switch being closed.

[0011] The locking assembly includes a connecting structure and a locking pin. A fixing hole is provided in the drawer compartment corresponding to the locking pin. The locking pin is connected to the drive rod through the connecting structure. When the operating handle is in the open position, the locking pin disengages from the fixing hole; when the operating handle is in the closed position, the locking pin is inserted into the fixing hole.

[0012] Preferably, the input socket is equipped with a fuse, which is electrically connected in series between the disconnect switch and the input socket to cut off the power supply path from the input socket to the disconnect switch and finally to the connection terminal.

[0013] Preferably, the drawer panel is also provided with an instrument panel, which is used to display the working status of the disconnecting switch. An indicator light is installed on the instrument panel, and the fuse is electrically connected to the indicator light, which is used to display the working status of the fuse.

[0014] Preferably, the adapter structure includes a rod bracket, a positioning slide plate, a connecting shaft, and a positioning pin seat. The bottom of the positioning slide plate is fixedly connected to the top of the locking pin. The top of the positioning slide plate has a waist hole. One end of the rod bracket is fixedly connected to the drive rod, and the other end is fixedly connected to the connecting shaft. The connecting shaft is slidably connected to the waist hole. The positioning pin seat has a guide groove facing the fixing hole, and the locking pin passes through the guide groove.

[0015] Preferably, a mounting plate is fixedly connected to the bottom of the inner cavity of the drawer body, the mounting plate being perpendicular to the bottom of the drawer body, and the disconnect switch is fixedly connected to the mounting plate.

[0016] Preferably, the connection terminal is connected to the disconnect switch via a cable, and the outer surface of the cable is provided with an insulating protective layer.

[0017] Preferably, the drawer body has multiple heat dissipation holes extending through it.

[0018] Preferably, the drawer panel is provided with a grip handle, and there are two grip handles symmetrically arranged on both sides of the drawer panel.

[0019] Preferably, the drawer compartment is provided with a guide rail along the moving path of the drawer body, and guide blocks that are slidably connected to the guide rail are provided on both sides of the drawer body.

[0020] On the other hand, this utility model also provides a switch cabinet, including a drawer compartment, wherein the drawer compartment is equipped with the above-mentioned special drawer switch developed based on the pull-out low-voltage switch cabinet.

[0021] The beneficial effects of this utility model are:

[0022] The sliding fit design between the drawer body and the drawer compartment allows for easy pushing and pulling of the drawer compartment by a dedicated drawer switch developed for pull-out low-voltage switchgear. The input socket on the drawer panel is directly connected to the isolating switch, ensuring that wiring for external loads is completed entirely outside the drawer, eliminating the need to contact live components inside the drawer compartment and fundamentally avoiding the risk of electric shock associated with disconnecting wires from live switchboards in traditional methods. The isolating switch, located inside the drawer body, is the core component for main circuit switching. Its operating handle is rotatably mounted on the drawer panel and mechanically linked to the isolating switch via a drive rod. When the operating handle rotates between the open (isolating switch open) and closed (isolating switch closed) positions, it directly drives the isolating switch to perform the opening and closing action. This ensures that operators can control power supply simply by rotating the operating handle outside the drawer panel, making the operation intuitive and completely isolated from live components. When the operating handle is rotated to the open position (isolating switch open), the transition structure causes the locking pin to retract completely and disengage from the fixing hole inside the drawer compartment, allowing the drawer body to be freely pushed in or pulled out. When the operating handle is turned to the closed position (isolation switch closed), the drive rod pushes the locking pin downwards through the adapter structure, inserting it into the pre-set fixing hole in the drawer compartment, forming a mechanical lock. On one hand, during the drawer's push-in phase, the locking pin only retracts when the isolating switch is in the open position (operating handle in the open position), allowing the drawer to be smoothly pushed in, avoiding the risk of live insertion. On the other hand, when the drawer is in operation, as long as the isolating switch is closed (handle in the closed position), the locking pin remains extended and locked. Attempts to pull out the drawer are forcibly prevented by the mechanical interference between the locking pin and the fixing hole, eliminating the safety hazard of live pulling. This purely mechanical interlocking method does not rely on electrical components or human operational memory; it improves the device's safety by forcibly constraining the operating sequence through physical structure. The drawer body adopts a modular mechanical linkage design, synchronously driving the isolating switch and locking pin with a single action of the operating handle, eliminating the need for complex electrical interlocking devices. The external direct connection to the input socket replaces traditional cable termination, reducing the number of components and assembly complexity, simplifying operation, and lowering costs. The drawer body adopts a standardized interface design, and its physical dimensions and electrical parameters can be adapted to the drawer compartments and power supply terminals of different switch cabinets, offering high configuration flexibility and strong compatibility. Inside the drawer body, physical partitions enclose live components such as connection terminals and disconnect switches in independent chambers, strictly isolating them from non-live areas such as operating handles and locking components. This completely prevents personnel from coming into contact with high-voltage circuits, reduces the risk of accidental energization during maintenance, and ensures high safety.

[0023] In summary, this utility model, through the external wiring method of the input socket, the direct control design of the isolating switch via the operating handle, and the mechanical interlocking structure of the locking pin, forms multiple safety guarantees. While ensuring power supply reliability, it reduces operational risks, simplifies the work process, and shortens the power outage time of critical loads. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the first structure of a special-purpose drawer switch developed based on a pull-out low-voltage switchgear, provided in Embodiment 1 of this utility model.

[0025] Figure 2 This is a schematic diagram of the second structure of the special-purpose drawer switch developed based on the withdrawable low-voltage switchgear provided in Embodiment 1 of this utility model;

[0026] Figure 3 This is a schematic diagram of the third structure of a special-purpose drawer switch developed based on a pull-out low-voltage switchgear, provided in Embodiment 1 of this utility model.

[0027] Figure 4 This is a top view of the special drawer switch developed based on the withdrawable low-voltage switchgear provided in Embodiment 1 of this utility model;

[0028] Figure 5 This is a schematic diagram of the structure of the switch assembly provided in Embodiment 1 of this utility model;

[0029] Figure 6 This is a schematic diagram of the use of a special drawer switch developed based on a pull-out low-voltage switchgear, as provided in Embodiment 1 of this utility model.

[0030] In the picture:

[0031] 100. Drawer body; 101. Drawer panel; 102. Isolation switch; 103. Connection terminal; 104. Ventilation hole; 105. Mounting plate; 106. Handle; 200. Drawer compartment; 201. Fixing hole; 1. Input socket; 2. Switch assembly; 21. Operating handle; 22. Drive rod; 3. Locking assembly; 31. Adapter structure; 311. Rod bracket; 312. Positioning slide; 313. Connecting shaft; 314. Positioning pin seat; 32. Locking pin; 4. Fuse; 5. Instrument panel; 6. Indicator light; 7. Cable; 300. Load; 400. Uninterruptible power drawer. Detailed Implementation

[0032] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0033] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0036] When electrical control panels are being maintained during generator overhauls, if a load in the section cannot be de-energized, temporary re-power supply is required. The common practice is to find a spare drawer in an adjacent energized control panel, disconnect the load cable from the drawer switch's outgoing terminal, use a temporary cable, connect one end of the temporary cable to the load cable, and the other end to the outgoing terminal of the spare drawer in the adjacent control panel. The original drawer is then moved into the spare compartment to re-energize the load that cannot be de-energized. The disadvantages of this approach are: firstly, both the upper and lower drawers are energized when disconnecting the cables at the load cable terminals and the spare compartment's outgoing terminal, posing a high risk of electric shock; secondly, termination requires at least eight cable joints, resulting in a longer working time and increasing the temporary power outage time for loads that cannot be de-energized for extended periods. Existing technologies also disclose some drawers for re-power supply. However, in existing technologies, the re-power supply socket box lacks necessary restraint mechanisms during use, and its operation relies entirely on the operator's memory, posing a risk of the re-power supply socket box being pulled out while energized.

[0037] Example 1

[0038] See Figure 1 and Figure 5The special drawer switch developed based on the pull-out low-voltage switchgear provided in this utility model embodiment includes a drawer body 100, which is slidably disposed in a drawer compartment 200. A drawer panel 101 is provided at the front of the drawer body 100, an isolating switch 102 is provided inside the drawer body 100, a connection terminal 103 electrically connected to the isolating switch 102 is provided at the rear of the drawer body 100, and a power supply terminal capable of connecting and communicating with the connection terminal 103 is provided inside the drawer compartment 200.

[0039] The drawer body 100 includes an input socket 1, a switch assembly 2, and a locking assembly 3. The input socket 1 is disposed on the drawer panel 101 and electrically connected to the disconnect switch 102. The switch assembly 2 includes an operating handle 21 and a drive rod 22. The operating handle 21 is rotatably disposed on the drawer panel 101 and can rotate between an open position and a closed position. The operating handle 21 drives the disconnect switch 102 through the drive rod 22, wherein the open position corresponds to the disconnect switch 102 being open, and the closed position corresponds to the disconnect switch 102 being closed. The locking assembly 3 includes a connecting structure 31 and a locking pin 32. A fixing hole 201 is provided in the drawer compartment 200 corresponding to the locking pin 32. The locking pin 32 is connected to the drive rod 22 through the connecting structure 31. When the operating handle 21 is in the open position, the locking pin 32 is disengaged from the fixing hole 201. When the operating handle 21 is in the closed position, the locking pin 32 is inserted into the fixing hole 201.

[0040] In use, first pull the original load drawer out of the drawer compartment 200 and disconnect the power. Then, insert the drawer body 100 into the drawer compartment 200. Before operation, ensure that the operating handle 21 is in the open position. At this time, the isolating switch 102 is in the off state, and the locking pin 32 is fully retracted into the drawer body 100 through the action of the adapter structure 31. The operator holds the drawer panel 101 with both hands and pushes the drawer body 100 into the drawer compartment 200. During this process, the connection terminal 103 at the rear of the drawer body 100 automatically connects with the preset power supply terminal in the drawer compartment 200 to form the main power input channel, so that the drawer body 100 is connected to the uninterruptible drawer 400. At this time, the input socket 1 is still in a de-energized state. Then, insert the power cord of the external load 300 into the input socket 1 on the drawer panel 101. After connecting the load 300, rotate the operating handle 21 from the open position to the closed position. This rotation drives the drive rod 22 to close the isolating switch 102, establishing a power supply path from the input socket 1 to the isolating switch 102 and finally to the connection terminal 103. Simultaneously, the drive rod 22 drives the locking pin 32 downwards via the adapter structure 31, precisely inserting it into the corresponding fixing hole 201 inside the drawer compartment 200, forming a mechanical lock. At this time, the drawer body 100 cannot be pulled out. When it is necessary to stop the power supply, rotate the operating handle 21 from the closed position back to the open position. This action drives the drive rod 22 to open the isolating switch 102, cutting off the power supply to the input socket 1. Simultaneously, the adapter structure 31 drives the locking pin 32 upwards to retract into the drawer body 100, disengaging it from the fixing hole 201 and releasing the lock. Finally, unplug the power cord of the load 300 and smoothly pull the drawer body 100 out of the drawer compartment 200. At this time, the connection terminal 103 automatically separates from the power supply terminal.

[0041] The sliding fit design between the drawer body 100 and the drawer compartment 200 allows for easy pushing and pulling of the drawer compartment 200. The input socket 1 on the drawer panel 101 is directly connected to the isolating switch 102, ensuring that wiring of the external load 300 is completed entirely outside the drawer, eliminating the need to contact live components inside the drawer compartment 200 and fundamentally avoiding the risk of electric shock associated with disconnecting wires from live electrical panels in traditional methods. The isolating switch 102, located inside the drawer body 100, is the core component for switching the main circuit. Its operating handle 21 is rotatably mounted on the drawer panel 101 and mechanically linked to the isolating switch 102 via a drive rod 22. When the operating handle 21 rotates between the open (isolating switch 102 open) and closed (isolating switch 102 closed) positions, it directly drives the isolating switch 102 to perform the opening and closing action. This ensures that the operator only needs to rotate the operating handle 21 outside the drawer panel 101 to control the power supply, making the operation intuitive and completely isolated from live components. When the operating handle 21 is turned to the open position (isolation switch 102 is off), the adapter structure 31 causes the locking pin 32 to retract completely and disengage from the fixing hole 201 in the drawer compartment 200, allowing the drawer body 100 to be freely pushed in or pulled out. When the operating handle 21 is turned to the closed position (isolation switch 102 is closed), the drive rod 22 pushes the locking pin 32 downward through the adapter structure 31, causing it to insert into the preset fixing hole 201 in the drawer compartment 200, forming a mechanical lock. On the one hand, during the push-in phase of the drawer body 100, the locking pin 32 will only retract when the isolating switch 102 is in the open state (operating handle 21 is in the open position), allowing the drawer body 100 to be smoothly pushed into place, thus avoiding the risk of live insertion. On the other hand, when the drawer body 100 is in the working state, as long as the isolating switch 102 is closed (handle is in the closed position), the locking pin 32 remains extended and locked. At this time, any attempt to pull out the drawer body 100 will be forcibly prevented by the mechanical interference between the locking pin 32 and the fixing hole 201, eliminating the safety hazard of live pulling. This purely mechanical interlocking method does not rely on electrical components or human operating memory, but forcibly constrains the operating sequence through physical structure, improving the safety of the device. The drawer body 100 adopts a modular mechanical linkage design, which synchronously drives the isolating switch 102 and the locking pin 32 through a single action of the operating handle 21, eliminating the need for complex electrical interlocking devices; the external direct connection of the input socket 1 replaces the traditional cable termination, reducing the number of components and assembly complexity, making operation simple and cost-effective. The drawer body 100 adopts a standardized interface design, and its physical dimensions and electrical parameters can be adapted to the drawer compartments 200 and power supply terminals of switch cabinets of different specifications, with high configuration freedom and strong compatibility.The drawer body 100 has a physical partition that encloses the live components such as the connection terminal 103 and the disconnect switch 102 in an independent chamber, which is strictly isolated from non-live areas such as the operating handle 21 and the locking assembly 3. This completely blocks the possibility of personnel coming into contact with the high-voltage circuit, reduces the risk of powering up the maintenance power supply section by mistake, and ensures high safety.

[0042] In summary, this utility model, through the external wiring method of the input socket 1, the direct control design of the isolating switch 102 via the operating handle 21, and the mechanical interlocking structure of the locking pin 32, forms multiple safety guarantees. While ensuring power supply reliability, it reduces operational risks, simplifies the work process, and shortens the power outage time of critical loads.

[0043] The following section provides a detailed explanation of the specific structure and working principle of this specialized drawer switch developed based on a pull-out low-voltage switchgear.

[0044] Input socket 1 uses an aviation socket with a standardized interface design, which can complete the power switching of a 300 load with just one plug-in and unplug. Compared with the traditional method that requires at least eight cable connectors, it shortens the wiring time and is especially suitable for load scenarios that are sensitive to power outage time.

[0045] The drawer panel 101 is equipped with two handles 106, which are symmetrically arranged on both sides of the drawer panel 101. The two-hand grip design ensures even force distribution when pushing and pulling the drawer body 100, avoiding jamming of the drawer body 100 or misalignment of the connecting terminal 103 caused by applying force from one side. The symmetrical layout is ergonomic, allowing operators to apply force precisely in front of the cabinet, ensuring a smooth fit between the drawer body 100 and the drawer compartment 200, and effectively reducing the risk of installation deviation.

[0046] Preferably, a guide rail is provided inside the drawer compartment 200 along the moving path of the drawer body 100, and guide blocks are provided on both sides of the drawer body 100, which are slidably connected to the guide rail. The guide rail provides a precise guiding path for the movement of the drawer body 100, ensuring that the drawer body 100 moves strictly along a predetermined trajectory when sliding into or out of the drawer compartment 200, thus improving the accuracy of drawer operation. The guide blocks on both sides of the drawer body 100 cooperate with the guide rail, and their slidable connection effectively reduces the shaking and offset during drawer movement, making the drawer body 100's pulling process smoother and more stable, and reducing the risk of loosening or damage to internal electrical connections due to the shaking of the drawer body 100.

[0047] During operation, the internal electrical components, such as the isolating switch 102, generate heat due to the current flowing through them. Therefore, multiple heat dissipation holes 104 are provided through the drawer body 100. These holes 104 form air convection channels, allowing cool outside air to enter the drawer body 100 through one side of the heat dissipation hole 104. After absorbing the heat generated by the electrical components, the hot air is exhausted through the other side of the heat dissipation hole 104. This effectively dissipates the heat inside the drawer body 100, reducing its temperature and preventing performance issues or even damage to the isolating switch 102 and other electrical components due to excessive temperature, thus extending the service life of the electrical components.

[0048] It is understood that in the technical solution of this application, the disconnect switch 102 is used to realize the on / off control of the main circuit of the drawer body 100. It performs the function of connecting and disconnecting the power supply through the mechanical linkage of the operating handle 21 and the drive rod 22. The specific internal structure and operating mechanism of the disconnect switch 102 are within the scope of known technology in this field and are not the core improvement of this utility model, so they will not be described in detail here.

[0049] Specifically, the connection terminal 103 and the disconnect switch 102 are connected by a cable 7. The outer surface of the cable 7 is provided with an insulating protective layer. The cable 7 can effectively transmit the electrical energy obtained from the power supply terminal of the connection terminal 103 to the disconnect switch 102, thereby providing power to components such as the input socket 1 and ensuring the power flow of the entire drawer switch. The insulating protective layer on the outer surface of the cable 7 can effectively prevent current leakage, avoiding electric shock accidents when operators touch the area around the cable 7, and ensuring the personal safety of the operators. At the same time, the insulating protective layer can also prevent the cable 7 from short-circuiting or other faults due to external environmental factors such as moisture and dust.

[0050] A mounting plate 105 is fixedly connected to the bottom of the inner cavity of the drawer body 100. The mounting plate 105 is perpendicular to the bottom of the drawer body 100, and the disconnect switch 102 is fixedly connected to the mounting plate 105. The mounting plate 105 is vertically fixed to the bottom of the inner cavity of the drawer body 100, providing a stable and orderly mounting platform for the disconnect switch 102. This helps to make reasonable use of the space inside the drawer body 100, allowing the disconnect switch 102 to be arranged orderly on the vertical mounting plate 105, making the internal layout of the drawer more compact and reasonable. This also facilitates the rational planning and installation of other electrical components, improving the utilization rate of the internal space of the drawer body 100.

[0051] Input socket 1 is equipped with fuse 4, which is electrically connected in series between disconnect switch 102 and input socket 1. Fuses 4 are used to cut off the power supply path from input socket 1 to disconnect switch 102 and ultimately to connection terminal 103. When a circuit abnormality occurs, such as current overload or short circuit, fuse 4 connected in series between disconnect switch 102 and input socket 1 can react quickly. Due to the characteristics of fuse 4, when the current abnormally rises to a certain level, its internal fusible element will melt, thereby cutting off the power supply from disconnect switch 102 to input socket 1, effectively protecting the electrical equipment connected to input socket 1 and preventing damage to the equipment due to excessive current.

[0052] Furthermore, an instrument panel 5 is also provided on the drawer panel 101. The instrument panel 5 is used to display the working status of the disconnector switch 102. An indicator light 6 is installed on the instrument panel 5. The fuse 4 is electrically connected to the indicator light 6, and the indicator light 6 is used to display the working status of the fuse 4. The display of the working status of the disconnector switch 102 on the instrument panel 5 allows the operator to intuitively and clearly understand whether the disconnector switch 102 is closed or open from the outside of the drawer body 100, without having to open the drawer to check. This facilitates the operator to grasp the circuit's on / off status in a timely manner, improving safety and convenience. Since the indicator light 6 is electrically connected to the fuse 4, when the fuse 4 is working normally, the indicator light 6 can provide a normal indication; once the fuse 4 blows due to abnormal current or other reasons, the state of the indicator light 6 will change accordingly, which can prompt the operator to be aware of the fuse 4's malfunction and replace it in time, avoiding safety hazards caused by the failure to detect the fuse 4's malfunction.

[0053] Optionally, the instrument panel 5 mounted on the drawer panel 101 adopts an LCD display screen. The instrument panel 5 is connected to the signal detection device inside the disconnect switch 102 to obtain the real-time operating status information of the disconnect switch 102 and display it on the screen in a clear and intuitive graphic and text format. For example, when the disconnect switch 102 is closed, the instrument panel 5 screen will display the words "Switch closed, circuit connected" with a green indicator; when the disconnect switch 102 is open, it will display the words "Switch open, circuit disconnected" and the indicator will turn red.

[0054] Two indicator lights 6 are installed on the instrument panel 5: a green normal indicator light 6 and a red fault indicator light 6. These two indicator lights 6 are electrically connected to the fuse 4 via a cable 7. Under normal circumstances, the green indicator light 6 is lit, indicating that the fuse 4 is in normal working condition and can effectively ensure the safety of the circuit. Once the fuse 4 blows due to abnormal current, the red fault indicator light 6 will light up immediately, and the green indicator light 6 will turn off, reminding the operator that the fuse 4 has failed and needs to be replaced promptly.

[0055] In the locking assembly 3, the locking pin 32 is controlled to be inserted into or disengaged from the fixing hole 201 by the adapter structure 31 connected to the drive rod 22, thereby achieving the locking and unlocking effect of the drawer body 100.

[0056] Specifically, the adapter structure 31 includes a rod bracket 311, a positioning slide plate 312, a connecting shaft 313, and a positioning pin seat 314. The bottom of the positioning slide plate 312 is fixedly connected to the top of the locking pin 32. The top of the positioning slide plate 312 has a waist hole. One end of the rod bracket 311 is fixedly connected to the drive rod 22, and the other end is fixedly connected to the connecting shaft 313. The connecting shaft 313 is slidably connected to the waist hole. The positioning pin seat 314 has a guide groove facing the fixing hole 201, and the locking pin 32 passes through the guide groove.

[0057] In use, when the operating handle 21 is rotated, the drive rod 22 moves accordingly. Since one end of the rod bracket 311 is fixed to the drive rod 22, the rod bracket 311 moves together with the drive rod 22. The connecting shaft 313 at the other end of the rod bracket 311 slides within the waist hole at the top of the positioning slide plate 312. The bottom of the positioning slide plate 312 is fixedly connected to the top of the locking pin 32. When the connecting shaft 313 slides within the waist hole, it drives the positioning slide plate 312 and the connected locking pin 32 to move accordingly. When the operating handle 21 is rotated from the closed position to the open position, the drive rod 22 drives the rod bracket 311 to move, and the connecting shaft 313 slides within the waist hole in the direction that causes the positioning slide plate 312 to disengage the locking pin 32 from the fixing hole 201. Finally, the locking pin 32 disengages from the fixing hole 201 in the drawer compartment 200, the drawer body 100 is unlocked, and it can be pulled out of the drawer compartment 200. When the operating handle 21 is rotated from the open position to the closed position, the drive rod 22 drives the rod bracket 311 in the opposite direction, and the connecting shaft 313 slides in the opposite direction in the waist hole, causing the positioning slide plate 312 to drive the locking pin 32 to move towards the fixing hole 201. Finally, the locking pin 32 is inserted into the corresponding fixing hole 201 in the drawer compartment 200, and the drawer body 100 is locked. Throughout the process, the locking pin 32 always passes through the guide groove on the positioning pin seat 314 that faces the fixing hole 201. The guide groove guides the movement of the locking pin 32, ensuring that it is accurately inserted into or disengaged from the fixing hole 201.

[0058] The adapter structure 31, through the coordinated operation of the rod bracket 311, positioning slide plate 312, connecting shaft 313, and positioning pin seat 314, enables the operating handle 21 to precisely control the locking pin 32. The sliding connection between the waist hole and the connecting shaft 313 accurately converts the rotation of the drive rod 22 into the linear motion of the locking pin 32, ensuring that the locking pin 32 accurately inserts into or disengages from the fixing hole 201 along a predetermined trajectory, thus improving the reliability of drawer locking and unlocking operations. The bottom of the positioning slide plate 312 is fixedly connected to the top of the locking pin 32, and the positioning pin seat 314 has a guide groove, providing stable support and guidance for the locking pin 32 during movement, enhancing the structural stability of the entire locking assembly 3. Even when the drawer is subjected to external forces such as vibration, the locking pin 32 can still function normally without loosening or shifting, effectively preventing the drawer from being accidentally pulled out when powered on, thus improving the safety of drawer operation.

[0059] Example 2

[0060] This invention also provides a switchgear, including a drawer compartment 200. The drawer compartment 200 is equipped with a dedicated drawer switch developed based on the withdrawable low-voltage switchgear provided in Embodiment 1. During generator overhauls, when electrical panel maintenance is required and some loads cannot be de-energized, temporary power supply can be provided to these loads, enhancing the switchgear's ability to handle complex power supply scenarios and avoiding production stoppages caused by partial load power outages. The isolating switch 102, connection terminals 103, and other components within the drawer switch work together to ensure stable power transmission and smooth drawer operation, improving the overall performance of the switchgear, reducing the probability of failure, and extending the switchgear's service life.

[0061] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above embodiments. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A special-purpose drawer switch developed based on a pull-out low-voltage switchgear, comprising a drawer body (100), the drawer body (100) being slidably disposed within a drawer compartment (200), a drawer panel (101) being disposed at the front of the drawer body (100), an isolating switch (102) being disposed within the drawer body (100), a connection terminal (103) electrically connected to the isolating switch (102) being disposed at the rear of the drawer body (100), and a power supply terminal capable of engaging and communicating with the connection terminal (103) being disposed within the drawer compartment (200), characterized in that, The drawer body (100) includes: An input socket (1) is provided on the drawer panel (101) and electrically connected to the disconnect switch (102); The switch assembly (2) includes an operating handle (21) and a drive rod (22). The operating handle (21) is rotatably disposed on the drawer panel (101) and can rotate between an open position and a closed position. The operating handle (21) drives the disconnect switch (102) through the drive rod (22). The open position corresponds to the disconnect switch (102) being open, and the closed position corresponds to the disconnect switch (102) being closed. The locking assembly (3) includes a connecting structure (31) and a locking pin (32). A fixing hole (201) is provided in the drawer compartment (200) corresponding to the locking pin (32). The locking pin (32) is connected to the drive rod (22) through the connecting structure (31). When the operating handle (21) is in the open position, the locking pin (32) is disengaged from the fixing hole (201). When the operating handle (21) is in the closed position, the locking pin (32) is inserted into the fixing hole (201).

2. The special-purpose drawer switch developed based on a withdrawable low-voltage switchgear according to claim 1, characterized in that, The input socket (1) is equipped with a fuse (4), which is electrically connected in series between the disconnect switch (102) and the input socket (1) to cut off the power supply path from the input socket (1) to the disconnect switch (102) and finally to the connection terminal (103).

3. The special-purpose drawer switch developed based on a withdrawable low-voltage switchgear according to claim 2, characterized in that, The drawer panel (101) is also provided with an instrument panel (5), which is used to display the working status of the disconnect switch (102). An indicator light (6) is installed on the instrument panel (5). The fuse (4) is electrically connected to the indicator light (6). The indicator light (6) is used to display the working status of the fuse (4).

4. The special-purpose drawer switch developed based on a withdrawable low-voltage switchgear according to claim 1, characterized in that, The adapter structure (31) includes a rod bracket (311), a positioning slide plate (312), a connecting shaft (313), and a positioning pin seat (314). The bottom of the positioning slide plate (312) is fixedly connected to the top of the locking pin (32). The top of the positioning slide plate (312) is provided with a waist hole. One end of the rod bracket (311) is fixedly connected to the drive rod (22), and the other end is fixedly connected to the connecting shaft (313). The connecting shaft (313) is slidably connected to the waist hole. The positioning pin seat (314) is provided with a guide groove facing the fixing hole (201), and the locking pin (32) passes through the guide groove.

5. The special-purpose drawer switch developed based on a withdrawable low-voltage switchgear according to claim 1, characterized in that, A mounting plate (105) is fixedly connected to the bottom of the inner cavity of the drawer body (100). The mounting plate (105) is perpendicular to the bottom of the drawer body (100), and the disconnect switch (102) is fixedly connected to the mounting plate (105).

6. The special-purpose drawer switch developed based on a withdrawable low-voltage switchgear according to claim 1, characterized in that, The connection terminal (103) is connected to the disconnect switch (102) via a cable (7), and the outer surface of the cable (7) is provided with an insulating protective layer.

7. The special-purpose drawer switch developed based on a withdrawable low-voltage switchgear according to claim 1, characterized in that, The drawer body (100) has multiple ventilation holes (104) through it.

8. The special-purpose drawer switch developed based on a withdrawable low-voltage switchgear according to claim 1, characterized in that, The drawer panel (101) is provided with a grip handle (106), and there are two grip handles (106) symmetrically arranged on both sides of the drawer panel (101).

9. The special-purpose drawer switch developed based on a withdrawable low-voltage switchgear according to claim 1, characterized in that, The drawer compartment (200) is provided with a guide rail along the moving path of the drawer body (100), and guide blocks that are slidably connected to the guide rail are provided on both sides of the drawer body (100).

10. A switch cabinet, characterized in that, Includes a drawer compartment (200), which is equipped with a special-purpose drawer switch developed based on a pull-out low-voltage switchgear as described in any one of claims 1-9.

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