Soft starting device in explosion-proof high-voltage cabinet and explosion-proof high-voltage cabinet

Abstract

The utility model discloses a soft starting device in an explosion-proof high-voltage cabinet, which comprises a cart and soft starting equipment erected on the cart, and a plurality of movable supporting components which are used for moving the cart and can be rotatably accommodated in the cart are arranged below the cart. The utility model further discloses an explosion-proof high-voltage cabinet which comprises a cabinet body and a cabinet door, the cabinet door is rotatably arranged on the cabinet body, the explosion-proof high-voltage cabinet further comprises the soft starting device in the explosion-proof high-voltage cabinet, and the inner bottom surface of the cabinet body is provided with a telescopic track which can extend out of the cabinet body and is used for being matched with the soft starting device to move out or push in. The soft starting device in the explosion-proof high-voltage cabinet can move freely as a whole, a worker can directly assemble, overhaul and maintain the soft starting device, operation in a narrow space is not needed, the worker of the explosion-proof high-voltage cabinet can enter the cabinet rapidly for overhaul, and the working efficiency is improved. The time for dismounting or moving the soft starting device is reduced, and the efficiency of maintenance work is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of explosion -proof high -voltage electrical apparatus, especially relates to a soft starting device and high -voltage cabinet. BACKGROUND

[0002] Explosion -proof high -voltage soft starting cabinet with its outstanding performance and safety has been widely used in the industrial field.This kind of equipment can effectively control the start and stop of high -voltage motor, reduce the impact of starting current to the power grid, thereby prolonging the service life of motor, and improving the stability of the whole power system.In addition, the safety of explosion -proof design ensures the use in flammable and explosive environment, provides solid guarantee for industrial production.But because explosion -proof high -voltage soft starting cabinet is usually used in the environment of harsh, narrow space, the traditional high -voltage cabinet soft starting device often needs to use forklift or crane to take it out from the cabinet, makes assembly and later maintenance become complex and time -consuming, although some cabinet soft starting device and cabinet device can be pulled out or pushed back to the cabinet, but because the soft starting device cannot move freely, lead to the pull -out distance is very limited, and because the opening width of the door of explosion -proof high -voltage soft starting cabinet is limited, the soft starting device on the side close to the door maintenance space is narrow, is not favorable to overhaul, and the gap between the soft starting device on both sides and the cabinet is narrow, personnel cannot enter the cabinet and overhaul, resulting in the assembly process of high -voltage soft starting cabinet is still complex, and the later maintenance and maintenance work are also quite troublesome. UTILITY MODEL CONTENTS

[0003] The utility model solves the technical problem that the above -mentioned insufficient and defects in the background art are overcome, and provides an explosion -proof high -voltage cabinet soft starting device that can move freely as a whole, is convenient to overhaul and maintain, and an explosion -proof high -voltage cabinet that is convenient for personnel to enter the cabinet and overhaul.

[0004] To solve the above technical problems, the technical scheme provided by the utility model is as follows:

[0005] An explosion -proof high -voltage cabinet soft starting device, comprising a trolley and a soft starting device arranged on the trolley, and a plurality of movable support members arranged below the trolley and rotatably accommodated in the trolley.

[0006] In the above -mentioned explosion -proof high -voltage cabinet soft starting device, preferably, the movable support member comprises a support vertical rod and a universal wheel arranged below the support vertical rod, and the upper end of the support vertical rod is rotatably arranged below the trolley.The arrangement of the universal wheel makes the trolley easy to move, improves the mobility and flexibility of the whole device.

[0007] In the explosion-proof high-voltage cabinet soft start device, preferably, the moving support member further comprises a recovery spring, one end of the recovery spring is connected with the support vertical rod, and the other end is connected with the bottom of the trolley. By setting the recovery spring, the moving support member can be recovered by the recovery spring when not in use, and is automatically stably stored in the bottom of the trolley, which is simple in structure, convenient to operate, reduces the steps of manual storage, and improves the efficiency. When the support vertical rod is in the recovered state, the recovery spring is in the contracted state, and when the support vertical rod is in the working state (i.e. the vertical state), the recovery spring is in the stretched state, which will give the support vertical rod an inward recovery force to force the support vertical rod to recover. Cooperating with the subsequent positioning device, the working state switching of the support vertical rod can be easily realized.

[0008] In the explosion-proof high-voltage cabinet soft start device, preferably, the trolley is provided with a positioning device for limiting the support vertical rod to keep it in the vertical state, the positioning device comprises a positioning pin hole and a positioning pin which can be inserted into the positioning pin hole, and the positioning pin hole is arranged on the trolley. The cooperation of the positioning pin hole and the positioning pin makes the worker only need to complete the positioning of the support vertical rod through a simple insertion action, which is simple and fast to operate and ensures the stability of the support vertical rod in the vertical state. Specifically, when it is needed to keep the support vertical rod in the vertical state, the positioning pin is inserted into the positioning pin hole, at this time the positioning pin will block the support vertical rod from being recovered inward, and when it is needed to make the support vertical rod recover, the positioning pin is pulled out, and the support vertical rod can be automatically recovered due to the elastic force of the recovery spring.

[0009] In the explosion-proof high-voltage cabinet soft start device, preferably, the soft start device comprises a soft start silicon box, an isolation contactor and a bypass contactor, the isolation contactor and the bypass contactor are fixed on the trolley, the soft start silicon box is arranged above the isolation contactor and the bypass contactor, and the three are connected through cables. This setting makes the maintenance work more intuitive and convenient, the worker can directly maintain and repair the soft start silicon box without additional operation or adjustment, the soft start silicon box located above is also more conducive to heat dissipation, and the cable connection is not easily affected by the environment, the high-voltage soft start copper bar connection is easily affected by the flammable and explosive environment to easily produce arc explosion, and the safety of the whole device is improved.

[0010] In the aforementioned soft starter device within the explosion-proof high-voltage cabinet, preferably, the soft starter silicon box is a detachable soft starter silicon box, comprising a base plate and multiple silicon boxes. The multiple silicon boxes are mounted on the base plate and are not connected to each other. The base plate is mounted above the isolating contactor and bypass contactor. The detachable soft starter silicon box is characterized by its small size and the ability to perform individual maintenance, significantly reducing the space occupied by the silicon box within the explosion-proof cabinet. During later maintenance and repair, individual silicon boxes can be directly removed and replaced, reducing the maintenance and repair cycle. Furthermore, the detachable soft starter silicon box can utilize insulating partitions to insulate the metal base plate of the silicon box from the contactor, and because the detachable soft starter silicon box is an open-mold insulating component, it provides more effective insulation.

[0011] As a general technical concept, this utility model also provides an explosion-proof high-voltage cabinet, including a cabinet body and a cabinet door. The cabinet door is rotatably mounted on the cabinet body. It also includes a soft starter device inside the explosion-proof high-voltage cabinet. The bottom surface of the cabinet body is provided with a telescopic track that extends out of the cabinet body to facilitate the movement or insertion of the soft starter device. The telescopic track can be stored inside the cabinet when not in use, saving space, and can be easily retrieved for use when needed, optimizing the internal space utilization of the cabinet. Furthermore, the telescopic track makes it easier to move the soft starter device in and out of the cabinet, allowing personnel to easily maintain and repair it. If entry into the cabinet for maintenance is required, the soft starter device can be removed using the movable support components, and then pushed out to move freely off the track, improving maintenance efficiency and convenience.

[0012] In the aforementioned explosion-proof high-voltage cabinet, preferably, the trolley is provided with pulleys on both sides for sliding along the telescopic track, and the telescopic track is provided with a blocking crossbar on the side near the cabinet door to prevent the trolley from easily sliding off. The pulleys are toothed wheels that can cross the blocking crossbar. The blocking crossbar effectively prevents the trolley from easily sliding off the track due to accidental or improper operation, increasing safety. Setting the pulleys as toothed wheels allows for easy crossing of the blocking crossbar by applying a certain pushing force when it is necessary to disengage from the telescopic track; this design provides both safety and flexibility.

[0013] In the aforementioned explosion-proof high-voltage cabinet, preferably, the telescopic track is provided with a rotatable and retractable track support rod on the side near the cabinet door to support the extended portion of the telescopic track. The track support rod provides additional support points for the telescopic track, enhancing its stability. Furthermore, the track support rod can be rotated back to one side of the telescopic track, allowing it to be compactly stored inside the cabinet when not in use.

[0014] In the aforementioned explosion-proof high-voltage cabinet, preferably, the trolley is further equipped with outgoing stationary contacts and incoming stationary contacts, and the cabinet body is equipped with a contact box for inserting and connecting the outgoing and incoming stationary contacts. The positions of the outgoing and incoming stationary contacts match those of the contact box. This arrangement allows the outgoing and incoming stationary contacts to be inserted into the contact box inside the explosion-proof high-voltage soft starter cabinet as soon as the trolley is pushed in, achieving rapid assembly and improving work efficiency. When the soft starter needs maintenance or repair, the trolley can be easily moved out, thus disconnecting the circuit connection and making maintenance or repair safer.

[0015] Compared with the prior art, the advantages of this utility model are:

[0016] The soft starter device inside the explosion-proof high-voltage cabinet of this utility model, by setting a movable support component, allows the soft starter device to move freely as a whole and slide completely out of the cabinet. This allows personnel to directly assemble, inspect, and maintain the soft starter device without having to operate in a confined space, simplifying the operation process and greatly improving the convenience and efficiency of assembly, inspection, and maintenance. It also reduces the time and cost required for operation and lowers the risk of device damage due to improper maintenance. The freely movable soft starter device in the explosion-proof high-voltage cabinet of this utility model allows personnel to quickly enter the cabinet for inspection, reducing the time spent disassembling or moving the soft starter device and improving the efficiency of maintenance work. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the soft starter device in the explosion-proof high-voltage cabinet in a partially extended state (the movable support component is not fully lowered).

[0019] Figure 2 This is a schematic diagram of the overall structure of the explosion-proof high-voltage cabinet with the soft starter device fully extended in the embodiment (the movable support component is fully lowered).

[0020] Figure 3 for Figure 2 Enlarged view of point A.

[0021] Figure 4 This is a schematic diagram of the retracted state of the movable support component of the soft starter device inside the explosion-proof high-voltage cabinet, as shown in the embodiment (the movable support component is fully retracted).

[0022] Legend

[0023] 1. Cabinet; 2. Cabinet door; 3. Trolley; 4. Soft starter; 11. Telescopic rail; 12. Blocking crossbar; 13. Rail support rod; 31. Supporting vertical rod; 32. Casters; 33. Retraction spring; 34. Positioning pin hole; 35. Pulley; 41. Soft starter silicon box; 42. Isolating contactor; 43. Bypass contactor; 44. Outgoing stationary contact; 45. Incoming stationary contact; 46. Voltage transformer; 47. Current transformer. Detailed Implementation

[0024] To facilitate understanding of this utility model, it will be described more comprehensively and in detail below with reference to the accompanying drawings and preferred embodiments. However, the scope of protection of this utility model is not limited to the following specific embodiments.

[0025] It should be noted that when a component is described as being "fixed to, attached to, connected to or connected to" another component, it can be directly fixed to, attached to, connected to or connected to the other component, or it can be indirectly fixed to, attached to, connected to or connected to the other component through other intermediate connectors.

[0026] Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by those skilled in the art. The technical terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the scope of protection of this invention.

[0027] Unless otherwise specified, all raw materials, reagents, instruments and equipment used in this invention can be purchased from the market or prepared by existing methods.

[0028] Example:

[0029] like Figures 1 to 4 As shown, the soft starter device inside the explosion-proof high-voltage cabinet in this embodiment includes a trolley 3 and a soft starter 4 mounted on the trolley 3. Multiple movable support components are provided below the trolley 3 for moving the trolley 3 and can be rotatably stored within the trolley 3. In this embodiment, four movable support components are provided, but the number can be adjusted according to actual needs. Figure 4 As shown, the movable support component can be stored inside the trolley 3. Figure 2 As shown, the movable support component can be rotated to a vertical position to support the movable trolley 3.

[0030] In this embodiment, the movable support component includes a support rod 31 and a caster wheel 32 disposed below the support rod 31. The upper end of the support rod 31 is rotatably disposed below the trolley 3.

[0031] In this embodiment, the movable support component also includes a retraction spring 33, one end of which is connected to the support vertical rod 31, and the other end is connected to the bottom of the trolley 3.

[0032] In this embodiment, as Figure 3 As shown, the trolley 3 is equipped with a positioning device for limiting and supporting the vertical rod 31 to keep it in a vertical state. The positioning device includes a positioning pin hole 34 and a positioning pin that can be inserted into the positioning pin hole 34. The positioning pin hole 34 is located on the trolley 3.

[0033] In this embodiment, the soft starter device 4 includes a soft starter silicon box 41, an isolating contactor 42, and a bypass contactor 43. The isolating contactor 42 and the bypass contactor 43 are fixedly connected to the trolley 3, and the soft starter silicon box 41 is mounted above the isolating contactor 42 and the bypass contactor 43. The three are connected by a cable. In this embodiment, the soft starter device 4 also includes a voltage transformer 46 and a current transformer 47 for measuring and monitoring the voltage and current in the circuit, respectively.

[0034] In this embodiment, the soft starter silicon box 41 is a detachable soft starter silicon box, including a base plate and multiple silicon boxes. The multiple silicon boxes are mounted on the base plate and are not connected to each other. The base plate is mounted above the isolating contactor 42 and the bypass contactor 43. In other embodiments, a conventional partition-type soft starter silicon box can also be used.

[0035] The explosion-proof high-voltage cabinet of this embodiment includes a cabinet body 1 and a cabinet door 2. The cabinet door 2 is rotatably mounted on the cabinet body 1. It also includes a soft-start device inside the explosion-proof high-voltage cabinet. The bottom surface of the cabinet body 1 is provided with a telescopic rail 11 that can extend out of the cabinet body 1 to cooperate with the soft-start device for moving out or pushing in. The height of the movable support member can be set to be the same as the height of the top surface of the telescopic rail 11 so that the trolley 3 can be pushed out smoothly.

[0036] In this embodiment, the trolley 3 is provided with four pulleys 35 on both sides for sliding along the telescopic track 11. The telescopic track 11 is provided with a blocking bar 12 on the side near the cabinet door 2 to prevent the trolley 3 from easily sliding out. The pulleys 35 are toothed wheels that can cross the blocking bar 12. Each movable support component can be respectively set on the side of the pulley 35 near the cabinet door 2 so that the pulley 35 can be removed from the telescopic track 11 after the movable support component is vertically fixed.

[0037] In this embodiment, a rotatable and retractable track support rod 13 is provided on the side of the telescopic track 11 near the cabinet door 2 to support the extended portion of the telescopic track 11. Multiple reinforcing crossbars may also be provided at intervals between the extendable sections of the telescopic track 11 to increase the load-bearing capacity of the telescopic track 11.

[0038] In this embodiment, the trolley 3 is also equipped with an outgoing stationary contact 44 and an incoming stationary contact 45. The cabinet 1 is equipped with a contact box that is inserted and connected to the outgoing stationary contact 44 and the incoming stationary contact 45. The positions of the outgoing stationary contact 44 and the incoming stationary contact 45 are matched with the contact box.

[0039] In this embodiment, the soft starter device 4 circuit is divided into a soft starter circuit and a bypass circuit. The soft starter circuit is formed by the incoming stationary contact 45 being connected in sequence to the voltage transformer 46, the current transformer 47, the isolation contactor 42, the detachable soft starter silicon box, and the outgoing stationary contact 44 via a cable. The bypass circuit is formed by the incoming stationary contact 45 being connected in sequence to the voltage transformer 46, the current transformer 47, the bypass contactor 43, and the outgoing stationary contact 44 via a cable.

[0040] In this embodiment, the specific steps for removing the soft starter device from the explosion-proof high-voltage cabinet are as follows: open cabinet door 2, extend the telescopic rail 11, as shown... Figure 1 As shown, the soft-start device is moved out until the blocking crossbar 12 abuts against the front toothed wheel. Then, the movable support member of the front row inside the trolley 3 is moved out, and the movable support member is fixed by inserting the positioning pin into the positioning pin hole 34. After that, the soft-start device is dragged so that the front toothed wheel crosses the blocking crossbar 12 until the blocking crossbar 12 abuts against the rear toothed wheel, as shown. Figure 2 As shown, the movable support component in the rear row of the trolley 3 is then rotated out, and the movable support component is fixed by inserting the positioning pin into the positioning pin hole 34. Finally, the rear toothed wheel crosses the blocking crossbar 12. At this point, the soft start device is completely removed and can move smoothly and freely.

[0041] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A soft starter device for an explosion-proof high-voltage switchgear, comprising a trolley (3) and a soft starter device (4) mounted on the trolley (3), characterized in that, The trolley (3) is provided with a plurality of movable support components for moving the trolley (3) and which can be rotatably stored inside the trolley (3); The movable support component includes a support vertical rod (31) and a caster wheel (32) disposed below the support vertical rod (31). The upper end of the support vertical rod (31) is rotatably disposed below the trolley (3). The movable support component also includes a retraction spring (33), one end of which is connected to the support vertical rod (31), and the other end is connected to the bottom of the trolley (3); The trolley (3) is provided with a positioning device for limiting the support rod (31) to keep it in a vertical state. The positioning device includes a positioning pin hole (34) and a positioning pin that can be inserted into the positioning pin hole (34). The positioning pin hole (34) is located on the trolley (3).

2. The soft starter device inside the explosion-proof high-voltage cabinet according to claim 1, characterized in that, The soft starter device (4) includes a soft starter silicon box (41), an isolating contactor (42), and a bypass contactor (43). The isolating contactor (42) and the bypass contactor (43) are fixed on the trolley (3). The soft starter silicon box (41) is mounted above the isolating contactor (42) and the bypass contactor (43). The three are connected by a cable.

3. The soft starter device inside the explosion-proof high-voltage cabinet according to claim 2, characterized in that, The soft starter silicon box (41) is a detachable soft starter silicon box, including a base plate and multiple silicon boxes. The multiple silicon boxes are installed on the base plate and are not connected to each other. The base plate is mounted above the isolating contactor (42) and the bypass contactor (43).

4. An explosion-proof high-voltage switchgear, comprising a cabinet body (1) and a cabinet door (2), wherein the cabinet door (2) is rotatably mounted on the cabinet body (1), characterized in that, It also includes a soft starter device inside the explosion-proof high-voltage cabinet according to any one of claims 1-3, wherein the bottom surface of the cabinet (1) is provided with a telescopic track (11) that can extend out of the cabinet (1) to cooperate with the soft starter device to move out or push in.

5. The explosion-proof high-voltage switchgear according to claim 4, characterized in that, The trolley (3) is provided with pulleys (35) on both sides for sliding along the telescopic track (11). The telescopic track (11) is provided with a blocking bar (12) on the side near the cabinet door (2) to prevent the trolley (3) from easily sliding out. The pulley (35) is a toothed wheel that can cross the blocking bar (12).

6. The explosion-proof high-voltage switchgear according to claim 4, characterized in that, The telescopic track (11) is provided with a rotatable and retractable track support rod (13) on the side near the cabinet door (2) to support the extended part of the telescopic track (11).

7. The explosion-proof high-voltage switchgear according to claim 6, characterized in that, The trolley (3) is also equipped with an outgoing stationary contact (44) and an incoming stationary contact (45). The cabinet (1) is equipped with a contact box that is inserted and connected to the outgoing stationary contact (44) and the incoming stationary contact (45). The positions of the outgoing stationary contact (44) and the incoming stationary contact (45) are matched with the contact box.

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