Combined explosion-proof switch of mining vacuum power distribution device

Abstract

The utility model relates to a combined explosion-proof switch, and provides a combined explosion-proof switch of a mining vacuum power distribution device, which comprises an explosion-proof shell, a main cavity, an auxiliary cavity and an intrinsic safety cavity are arranged in the explosion-proof shell, and a vacuum circuit breaker is arranged in each main cavity. A unit loop is formed when a movable contact on the side face of the vacuum circuit breaker is connected with a static end binding post in the main cavity in an inserted mode, an electric trolley arranged in the main cavity is connected with the vacuum circuit breaker, and a moving mechanism is installed on the electric trolley and drives the electric trolley and the vacuum circuit breaker to move in the working process. Copper bars are mounted in the auxiliary cavities, and the copper bars in the auxiliary cavities are connected in parallel; the multi-path power supply control circuit has the advantages of wide application range, simple structure, reliable performance and low cost, multiple paths of power supplies can be controlled at the same time, the movable contact and the static end binding post can be separated into an isolation fracture, and the safety performance is improved while equipment maintenance is facilitated; the working process is automatic and intelligent, and the control system is suitable for the automatic unattended equipment of the coal mine distribution room.

Description

Technical Field

[0001] The utility model relates to a combined explosion-proof switch, in particular to a combined explosion-proof switch of a vacuum power distribution device for mining. Background Art

[0002] At present, in the control system of coal mine explosion-proof equipment, high, medium and low voltage explosion-proof switches are generally vacuum distribution devices consisting of an explosion-proof casing equipped with a vacuum circuit breaker. They can only control one power supply, and the connection of each conductive point uses braided wire to complete the conductive function.

[0003] However, there are the following problems: (1) Since the entire switch has too many contacts, the resistance becomes larger, which will cause the temperature inside the switch to rise too high, greatly reducing the electrical service life; (2) The explosion-proof casing is large in size and the internal layout is chaotic, which is not only inconvenient to maintain, but also poses a safety hazard. Utility Model Content

[0004] The purpose of the embodiment of the utility model is to provide a combined explosion-proof switch for a vacuum power distribution device for mining, aiming to solve the problems existing in the above-mentioned background technology.

[0005] The utility model is implemented in this way: a combined explosion-proof switch for a vacuum power distribution device for mining, including an explosion-proof housing, and also including:

[0006] The explosion-proof housing is provided with a main cavity, a secondary cavity and an intrinsically safe cavity, and the main cavity, the secondary cavity and the intrinsically safe cavity are separated and welded into independent cavities by metal plate support;

[0007] A vacuum circuit breaker, wherein a plurality of vacuum circuit breakers are provided, which are respectively arranged in each main cavity, and six moving contacts are installed on the side of the vacuum circuit breaker, and a static terminal terminal is also arranged inside the main cavity, which is used to connect the incoming and outgoing lines on the power supply side and the load side, and a unit circuit is formed when the static terminal terminal is plugged into the moving contact;

[0008] An electric trolley is arranged in the main chamber, and the vacuum circuit breaker is installed on the electric trolley and moves synchronously with the electric trolley;

[0009] A moving mechanism, wherein the moving mechanism is installed on the electric trolley and drives the electric trolley and the vacuum circuit breaker to move when the moving mechanism is in operation;

[0010] Wherein, the sub-cavity is equipped with a copper busbar, the copper busbars in multiple sub-cavities are connected in parallel, and the copper busbar is connected to the static end terminal.

[0011] Preferably, the moving mechanism comprises a servo reduction motor, a lead screw and a ball screw nut;

[0012] The servo reduction motor is fixedly arranged on the metal frame of the electric trolley, and the servo reduction motor is transmission-connected to one end of the lead screw;

[0013] The lead screw is rotatably arranged on the metal bottom plate of the electric trolley, and a ball screw nut is also installed on the lead screw, and the electric trolley and the vacuum circuit breaker are driven to move by rotating the ball screw nut.

[0014] Preferably, the servo reduction motor is electrically connected to an external PLC controller to facilitate adjustment of the movement process.

[0015] Preferably, the electric trolley is provided with a travel switch for limiting the movement and electrically locking the electric trolley.

[0016] Preferably, a side door is installed on the main cavity, and a locking buckle is arranged on the side door, and the locking buckle cooperates with the locking mechanism installed on the electric trolley to provide reliable mechanical and electrical locking functions.

[0017] Preferably, sliding rails are installed on both sides of the bottom plate in the main cavity to allow the electric trolley to move in and out, so as to facilitate the insertion of the moving contacts.

[0018] Preferably, a video camera is provided in the main cavity, and the video camera is located at the top of the moving contact and the static end terminal, and is used to monitor the insertion or removal process of the moving contact and the static end terminal, so as to visually observe the isolation fracture formed by the moving contact and the static end terminal.

[0019] The utility model provides a combined explosion-proof switch for a mine vacuum power distribution device, which has the following technical effects:

[0020] (1) Multiple vacuum circuit breakers are installed in an explosion-proof enclosure to form a multi-circuit independent switch that can control multiple power supplies at the same time;

[0021] (2) The moving contact and the static terminal on the side of the vacuum circuit breaker can be separated into isolation fractures, which facilitates equipment maintenance and improves safety performance;

[0022] (3) The moving contact and the static terminal are connected and disconnected, and the movement of the moving mechanism that drives the electric trolley is controlled by the PLC controller, which can realize automatic and intelligent operation, so that the present application can be applied to the control system of the automatic unattended equipment in the power distribution room of the coal mine;

[0023] In summary, the combined explosion-proof switch has the advantages of wide range of applications, simple structure, reliable performance and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A three-dimensional structural diagram of a combined explosion-proof switch of a vacuum power distribution device for mining provided in an embodiment of the utility model;

[0025] Figure 2 A schematic diagram of the front structure of the main chamber in a combined explosion-proof switch of a vacuum power distribution device for mining provided by an embodiment of the utility model;

[0026] Figure 3 A schematic diagram of the back structure of a secondary cavity in a combined explosion-proof switch of a vacuum power distribution device for mining provided by an embodiment of the utility model;

[0027] Figure 4 A schematic diagram of the structure of a main chamber in a combined explosion-proof switch for a vacuum power distribution device for mining provided in an embodiment of the utility model Figure 1 ;

[0028] Figure 5 A schematic diagram of the structure of a main chamber in a combined explosion-proof switch for a vacuum power distribution device for mining provided in an embodiment of the utility model Figure 2 ;

[0029] Figure 6 A schematic diagram of the structure of a main chamber in a combined explosion-proof switch for a vacuum power distribution device for mining provided in an embodiment of the utility model Figure 3 ;

[0030] Figure 7 A schematic diagram of the partial structure of a sub-cavity in a combined explosion-proof switch of a vacuum power distribution device for mining provided in an embodiment of the utility model Figure 1 ;

[0031] Figure 8 A schematic diagram of the partial structure of a sub-cavity in a combined explosion-proof switch of a vacuum power distribution device for mining provided in an embodiment of the utility model Figure 2 ;

[0032] In the attached figure: 1-main chamber; 2-auxiliary chamber; 3-intrinsically safe chamber; 4-vacuum circuit breaker; 5-moving contact; 6-static terminal; 7-copper busbar; 8-video camera; 9-locking mechanism; 10-servo reduction motor; 11-screw; 12-electric trolley; 13-travel switch; 14-handle; 15-sliding track. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0034] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0035] like Figures 1 to 8As shown, a structural diagram of a combined explosion-proof switch of a vacuum power distribution device for mining provided by an embodiment of the utility model comprises an explosion-proof housing, a vacuum circuit breaker 4, an electric trolley 12 and a moving mechanism. A main chamber 1, a sub-chamber 2 and an intrinsically safe chamber 3 are arranged inside the explosion-proof housing, and the main chamber 1, the sub-chamber 2 and the intrinsically safe chamber 3 are separated and welded into independent chambers by metal plate support. After the independent chambers are formed, even if one circuit fails, the normal operation of other circuits will not be affected; a plurality of vacuum circuit breakers 4 are provided, which are respectively arranged in each main chamber 1, and six moving contacts 5 are installed on the side of the vacuum circuit breaker 4. Six static terminal terminals 6 are also arranged inside the main chamber 1. The six static terminal terminals 6 It is divided into two groups, and each group of three static terminal terminals 6 are respectively used to connect the power input and load output of the power supply side and the load side, and a unit circuit is formed when the static terminal terminals 6 are plugged into the moving contact 5; the electric trolley 12 is arranged in the main cavity 1, and the vacuum circuit breaker 4 is installed on the electric trolley 12 and moves synchronously with it. The electric trolley 12 is also hinged with a buckle 14 for fixing the vacuum circuit breaker 4; the moving mechanism is installed on the electric trolley 12, and drives the electric trolley 12 and the vacuum circuit breaker 4 to move forward and backward when the moving mechanism is working; wherein, the auxiliary cavity 2 is installed with a copper busbar 7, and the copper busbars 7 in multiple auxiliary cavities 2 are connected in parallel, and the copper busbar 7 is connected to the static terminal terminals 6.

[0036] The utility model provides a combined explosion-proof switch for a vacuum power distribution device for mining, which has the advantages of wide application range, simple structure, reliable performance and low cost. A plurality of vacuum circuit breakers 4 are installed in an explosion-proof housing to form a multi-circuit independent switch, which can control multiple power supplies at the same time. The moving contact 5 and the static terminal 6 on the side of the vacuum circuit breaker 4 can be separated into an isolation break, which is convenient for equipment maintenance and improves safety performance. The moving contact 5 and the static terminal 6 are plugged in and out, and the movement of the moving mechanism that drives the electric trolley 12 to move is controlled by a PLC controller, which can realize automatic and intelligent operation, so that the application can be applied to the control system of automatic unattended equipment in the power distribution room of a coal mine.

[0037] In an example of the utility model, there are six moving contacts 5 and six static terminal posts 6, and the connection method is plug-in, which is convenient for maintenance. The moving contact 5 (male head) and the static terminal post 6 (female head) on each vacuum circuit breaker 4 cooperate with each other and form a conductive circuit when plugged in, and form an isolation break when separated, so as to completely isolate the vacuum circuit breaker 4 from the power supply side.

[0038] like Figure 4 , Figure 5 and Figure 6 As shown, as a preferred embodiment of the utility model, the moving mechanism includes a servo reduction motor 10, a lead screw 11 and a ball screw nut;

[0039] The servo reduction motor 10 is fixedly arranged on the metal frame of the electric trolley 12, and the servo reduction motor 10 is transmission-connected to one end of the lead screw 11;

[0040] The lead screw 11 is rotatably arranged on the metal bottom plate of the electric trolley 12, and a ball nut is also installed on the lead screw 11. The ball nut is fixedly connected to the vacuum circuit breaker 4 through a movable plate. The ball nut matches the lead screw, and the electric trolley 12 and the vacuum circuit breaker 4 are driven to move by rotating the ball nut.

[0041] In one example of the utility model, the servo reduction motor 10 is preferably a synchronous motor, one end of the screw 11 is connected to the servo reduction motor 10, and the other end of the screw 11 is connected to a manual tool for driving the vacuum circuit breaker 4 to move forward and backward, thereby realizing integrated electric and manual operation; in addition, two travel switches 13 are provided on the electric trolley 12, which are used to limit the movement and electrically lock the electric trolley 12, and when the vacuum circuit breaker 4 is in place, a signal is fed back to the PLC controller to control the servo reduction motor to stop.

[0042] As can be seen from the above, the lead screw 11 can be driven manually in addition to being driven electrically by the servo reduction motor 10, and the driving method can be adjusted according to needs.

[0043] like Figure 1 As another preferred embodiment of the utility model, a PLC controller and an intrinsically safe communication interface are connected in the intrinsically safe chamber 3, and the PLC controller is connected to the upper-level controller through the intrinsically safe communication interface.

[0044] In one example of the present invention, the PLC controller is also electrically connected to the servo reduction motor 10 to adjust the moving distance of the electric trolley 12 and the vacuum circuit breaker 4 .

[0045] like Figure 1 , Figure 4 and Figure 6 As shown, as another preferred embodiment of the utility model, a side door is installed on the main chamber 1, and a locking buckle is arranged on the side door, and the locking buckle cooperates with the locking mechanism 9 installed on the electric trolley 12.

[0046] In one example of the utility model, the locking mechanism 9 is preferably a hook, and the locking mechanism 9 is cut into and connected with the locking buckle on the side door of the main chamber 1 to form a mechanical locking system, and when the side door is closed, the locking buckle arranged on the side door contacts the hook to provide reliable mechanical and electrical locking functions; at the same time, as the electric trolley 12 moves forward and backward, the electric trolley 12 moves forward and drives the locking mechanism 9 to close quietly to complete the locking task between the front door of the main chamber 1 and the electric trolley 12. Conversely, when the electric trolley 12 moves backward, the closed state slowly expands, so that the locking mechanism 9 is disengaged from the locking buckle. At this time, the front door of the main chamber 1 can be opened to complete the locking task.

[0047] like Figure 4 As shown, as another preferred embodiment of the utility model, a video camera 8 is arranged in the main cavity 1, and the video camera 8 is located on the top of the moving contact 5 and the static terminal 6.

[0048] In one embodiment of the present invention, a video camera 8 is arranged to monitor the insertion or removal process of the moving contact 5 and the static terminal 6, so as to visually observe the isolation fracture formed by the moving contact 5 and the static terminal 6.

[0049] like Figure 4 As shown, as another preferred embodiment of the utility model, sliding rails 15 are installed on both sides of the bottom plate in the main cavity 1 for allowing the electric trolley 12 to move in and out, so as to facilitate the insertion of the guiding moving contact 5.

[0050] In one example of the utility model, by horizontally arranging a sliding rail 15 on the back plate of the main cavity 1, the electric trolley 12 moves along the sliding rail 15, which can effectively ensure the smooth movement of the electric trolley 12, the vacuum circuit breaker 4 and the moving contact 5 arranged on the side, and the moving contact 5 can be smoothly embedded in or detached from the static end terminal 6 while ensuring the stability of movement.

[0051] To sum up, the main difference between the combined explosion-proof switch of the mine vacuum distribution device provided in this embodiment and the traditional high, medium and low voltage explosion-proof switches in terms of usage method is that in this embodiment, when the moving mechanism drives the electric trolley 12 to move, the moving contact 5 arranged on the side of the vacuum circuit breaker 4 can be separated or closed with the six static terminal terminals 6 arranged on the rear partition of the main chamber 1, and the separation or closing is controlled by the PLC controller, which is controllable and can realize intelligent automation. In addition, this embodiment forms a multi-circuit independent switch by arranging upper and lower layers in an explosion-proof casing and installing multiple vacuum circuit breakers 4 at the same time, which can control multiple power supplies at the same time; therefore, the combined explosion-proof switch of the mine vacuum distribution device of this embodiment can be applied to the control system of the automated unattended equipment in the coal mine distribution room.

[0052] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0053] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A combined explosion-proof switch for a vacuum power distribution device for mining, comprising an explosion-proof housing, characterized in that: Also includes: The explosion-proof housing is provided with a main cavity, a secondary cavity and an intrinsically safe cavity, and the main cavity, the secondary cavity and the intrinsically safe cavity are separated and welded into independent cavities by metal plate support; A vacuum circuit breaker, wherein a plurality of vacuum circuit breakers are provided, which are respectively arranged in each main cavity, and six moving contacts are installed on the side of the vacuum circuit breaker, and a static terminal terminal is also arranged inside the main cavity, which is used to connect the incoming and outgoing lines on the power supply side and the load side, and a unit circuit is formed when the static terminal terminal is plugged into the moving contact; An electric trolley is arranged in the main chamber, and the vacuum circuit breaker is installed on the electric trolley and moves synchronously with the electric trolley; A moving mechanism, wherein the moving mechanism is installed on the electric trolley and drives the electric trolley and the vacuum circuit breaker to move when the moving mechanism is in operation; Wherein, the sub-cavity is equipped with a copper busbar, the copper busbars in multiple sub-cavities are connected in parallel, and the copper busbar is connected to the static end terminal.

2. A combined explosion-proof switch for a vacuum power distribution device for mining according to claim 1, characterized in that: The moving mechanism comprises a servo reduction motor, a lead screw and a ball screw nut; The servo reduction motor is fixedly arranged on the metal frame of the electric trolley, and the servo reduction motor is transmission-connected to one end of the lead screw; The lead screw is rotatably arranged on the metal bottom plate of the electric trolley, and a ball screw nut is also installed on the lead screw, and the electric trolley and the vacuum circuit breaker are driven to move by rotating the ball screw nut.

3. A combined explosion-proof switch for a vacuum power distribution device for mining according to claim 2, characterized in that: The servo reduction motor is electrically connected to an external PLC controller to facilitate adjustment of the movement process.

4. A combined explosion-proof switch for a vacuum power distribution device for mining according to claim 1, characterized in that: The electric trolley is provided with a travel switch for limiting the movement and electrically locking the electric trolley.

5. A combined explosion-proof switch for a vacuum power distribution device for mining according to claim 1, characterized in that: A side door is installed on the main cavity, and a locking buckle is arranged on the side door. The locking buckle cooperates with the locking mechanism installed on the electric trolley to provide reliable mechanical and electrical locking functions.

6. A combined explosion-proof switch for a vacuum power distribution device for mining according to claim 1, characterized in that: Sliding rails are installed on both sides of the bottom plate in the main cavity to allow the electric trolley to move in and out, so as to facilitate the insertion of the moving contact.

7. A combined explosion-proof switch for a vacuum power distribution device for mining according to claim 1, characterized in that: A video camera is arranged in the main cavity. The video camera is located at the top of the moving contact and the static terminal post and is used to monitor the insertion or removal process of the moving contact and the static terminal post so as to visually observe the isolation fracture formed by the moving contact and the static terminal post.

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