Door-opening circuit breaker locking mechanism of mining flame-proof high-voltage combined vacuum power distribution device

Abstract

The utility model relates to a mining flame-proof type high-voltage combined vacuum power distribution device door-opening circuit breaker locking mechanism, the locking mechanism comprises a guide rail, a locking plate and a connecting rod, the guide rail is fixedly connected in a box body of a power distribution device, the locking plate is located at the outer side of a circuit breaker operation shaft and is in sliding connection with the guide rail, one end of the connecting rod is hinged with the locking plate, and the other end of the connecting rod is connected with the circuit breaker operation shaft. The other end of the connecting rod is hinged to a box door of the box body, hinged shafts at the two ends of the connecting rod are parallel to a rotating shaft of the box door, the extending direction of the guide rail is perpendicular to the rotating shaft of the box door, the box door is provided with an outer operating shaft matched with a circuit breaker operating shaft, and when the box door is closed, the locking plate is located on the side, away from the rotating shaft of the box door, of the circuit breaker operating shaft. And the locking plate shields the circuit breaker operating shaft. When the box door is opened, the locking plate is driven by the connecting rod to shield and lock the circuit breaker operation shaft, so that operation electrification caused by misoperation of personnel on the circuit breaker operation shaft is prevented, personnel safety in the maintenance process is effectively guaranteed, and potential safety hazards are eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of distribution boxes, and is suitable for a mine-use flameproof and intrinsically safe combined high-voltage vacuum distribution device in an underground coal mine and in an environment where there is an explosive mixed gas environment such as methane and coal dust in the surrounding medium, and specifically refers to a door-opening circuit breaker locking mechanism of a mine-use flameproof high-voltage combined vacuum distribution device. Background Art

[0002] As the core equipment of mine power equipment, the mine flameproof and intrinsically safe combined high-voltage vacuum distribution device has the main function of distributing high-voltage electric energy to various electrical equipment to ensure the normal operation of the mine.

[0003] In the existing power distribution device, a circuit breaker operating shaft for opening and closing is provided on the outer end face of the circuit breaker located in the distribution box. In order to ensure the safety of personnel, an external operating shaft that can be matched and connected with the circuit breaker operating shaft is provided on the door of the distribution box. During normal use, the door is closed to connect the external operating shaft and the circuit breaker operating shaft, and the external operating shaft can be operated to drive the circuit breaker operating shaft to open and close. The closed isolation of the door can avoid the risk of leakage and electric shock to personnel. However, when maintenance or overhaul is required in the distribution box, the door is opened and the circuit breaker operating shaft is exposed to the outside. If a person mistakenly operates the circuit breaker operating shaft to close and energize it, it may cause great harm to the personal safety of the personnel, and there is a great safety hazard. Therefore, in view of the above problems, a mechanism is needed to lock the circuit breaker operating shaft when the door is open to effectively solve this safety hazard. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a door-opening circuit breaker locking mechanism for a mine flameproof high-voltage combined vacuum power distribution device, which effectively improves the safety of the power distribution device during use.

[0005] The utility model is realized through the following technical scheme: a locking mechanism for a door-opening circuit breaker of a flameproof high-voltage combined vacuum distribution device for mining, the locking mechanism comprising a guide rail, a locking plate and a connecting rod, the guide rail being fixedly connected to a box body of the distribution device, the locking plate being located outside a circuit breaker operating shaft of the circuit breaker and being slidably connected to the guide rail, one end of the connecting rod being hinged to the locking plate, the other end of the connecting rod being hinged to a box door of the box body, the hinge shafts at both ends of the connecting rod being parallel to the rotating shaft of the box door, the extending direction of the guide rail being perpendicular to the rotating shaft of the box door, an external operating shaft being provided on the box door and being matched with the circuit breaker operating shaft, when the box door is closed, the locking plate being located on a side of the circuit breaker operating shaft away from the box door rotating shaft, the external operating shaft being engaged and connected with the circuit breaker operating shaft, and when the box door is opened, the locking plate blocks the circuit breaker operating shaft.

[0006] In this solution, during normal use, when the box door is closed, the external operating shaft and the circuit breaker operating shaft are connected by snapping, and the circuit breaker operating shaft is driven to open and close by the external operating shaft, which improves the safety of use. During maintenance, the box door is opened, and the box door rotates to drive the locking plate to slide along the guide rail through the connecting rod, so that the locking plate blocks the circuit breaker operating shaft, thereby locking the circuit breaker operating shaft, and personnel cannot operate the circuit breaker operating shaft to energize it, effectively ensuring the safety of personnel during maintenance and eliminating safety hazards.

[0007] As an optimization, the outer side wall of the locking plate is fixedly connected with a locking seat, and the connecting rod and the locking seat are hinged. This optimization solution facilitates the hinge connection with the connecting rod by providing the locking seat, and enhances the connection stability.

[0008] As an optimization, the locking seat is an "L"-shaped structure, the locking seat vertical wall is fixedly connected to the front side wall of the locking plate, and the locking seat horizontal wall is hinged to the connecting rod. This optimization scheme realizes that one side is fixedly connected to the locking plate and the other side is hinged to the connecting rod through the L-shaped structure.

[0009] As an optimization, the guide rail is a tubular structure, a slider is provided in the inner cavity of the guide rail, a sliding hole is opened along the length direction of the guide rail, and the locking plate is fixedly connected with a fixing screw, which passes through the sliding hole and is fixedly connected with the slider. In this optimization solution, the locking plate slides along the sliding hole of the tubular guide rail through the slider, thereby realizing the sliding connection between the locking plate and the guide rail.

[0010] As an optimization, the two ends of the guide rail are fixedly connected with limit posts, and the limit posts are located on the sliding path of the slider. This optimization solution limits the slider by the limit posts to prevent the slider from sliding out of the guide rail.

[0011] As an optimization, a mounting plate is fixedly connected to the outer side of the circuit breaker, and the guide rail is fixedly connected to the mounting plate. This optimization solution realizes the fixing of the guide rail in the distribution box through the mounting plate.

[0012] The beneficial effects of the utility model are as follows: in normal use, when the box door is closed, the external operating shaft and the circuit breaker operating shaft are engaged and connected, and the circuit breaker operating shaft is driven to open and close by the external operating shaft, thereby improving the safety of use. During maintenance, when the box door is opened, the circuit breaker operating shaft is locked by the locking mechanism to prevent personnel from operating the circuit breaker operating shaft by mistake and turning on the power, thereby effectively ensuring the safety of personnel during maintenance and eliminating potential safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the door opening state of the utility model;

[0014] Figure 2 This is a schematic diagram of the utility model in a closed state;

[0015] Figure 3 It is a top view of the locking mechanism structure;

[0016] Figure 4 It is a front view of the locking mechanism structure;

[0017] Figure 5 It is a side view of the locking mechanism structure;

[0018] As shown in the figure:

[0019] 1. Connecting rod, 2. Guide rail, 3. Slider, 4. Fixing screw, 5. Locking plate, 6. Locking seat, 7. Mounting plate, 8. Box body, 9. Circuit breaker, 10. External operating shaft, 11. Circuit breaker operating shaft, 12. Limiting column, 13. Articulated shaft, 14. Mounting seat, 15. Rotating shaft, 81. Box door. DETAILED DESCRIPTION

[0020] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0021] like Figures 1 to 5 As shown in the figure, the locking mechanism of the door-opening circuit breaker of the explosion-proof high-voltage combined vacuum distribution device for mines is as follows: Figure 1 , 2 As shown, a circuit breaker 9 is arranged in a box body 8 of the power distribution device, a circuit breaker operating shaft 11 is arranged on the outer end surface of the circuit breaker 9, and a box door 81 is rotatably connected to the box body 8.

[0022] The locking mechanism includes a guide rail 2, a locking plate 5 and a connecting rod 1. The guide rail 2 is fixedly connected to the box body 8 of the power distribution device. Specifically, a mounting plate 7 is fixedly connected to the outer side of the circuit breaker 9 in this embodiment. The guide rail 2 is fixedly connected to the mounting plate 7. The extension direction of the guide rail 2 is perpendicular to the rotating shaft 15 of the box door. The guide rail 2 is located on the outer side of the circuit breaker 9 and is parallel to the outer end surface of the circuit breaker, and the guide rail 2 is arranged below the circuit breaker operating shaft 11.

[0023] like Figure 1 , 2 As shown, the locking plate 5 is located outside the circuit breaker operating shaft 11 and is slidably connected to the guide rail 2. Figure 4 As shown in FIG. 1 , the top of the locking plate 5 of this embodiment extends upward to the outside of the circuit breaker operating shaft 11. Figure 3 As shown, the guide rail 2 is a tubular structure, a sliding hole is opened along the length direction of the guide rail 2, a slider 3 is provided in the inner cavity of the guide rail, and the locking plate 5 is fixedly connected with a fixing screw 4, which passes through the sliding hole and is fixedly connected to the slider 3.

[0024] like Figure 5As shown, the guide rail 2 of this embodiment is a rectangular tube, the sliding hole is opened on the front side wall of the guide rail, the left and right ends of the locking plate 5 are fixedly connected to the slider 3 through the fixing screws 4, the fixing screws 4 pass through the locking plate and the sliding hole in turn transversely and are threadedly fixed to the slider 3, and a plurality of locking nuts are threadedly connected on the fixing screw 4 of this embodiment between the locking plate and the slider, and the locking plate 5 is locked and fixed by the locking nuts.

[0025] The two ends of the guide rail 2 are fixedly connected to limit posts 12, and the limit posts 12 are located on the sliding path of the slider 3. Figure 5 As shown, the limiting column 12 of this embodiment is a fastening bolt, which passes through the inner cavity of the guide rail 2 and is threadedly fixed to the mounting plate 7. While fixing the guide rail and the mounting plate, the bolt head of the fastening bolt also has a limiting effect. Figure 1 As shown, in this embodiment, when the door 81 is opened 90°, the slider 3 at the left end of the locking plate 5 contacts and limits the position with the limiting column 12 on the left side; when the door is closed, the slider at the right end of the locking plate contacts and limits the position with the limiting column on the right side.

[0026] One end of the connecting rod 1 is hinged to the locking plate 5, and the other end of the connecting rod 1 is hinged to the box door 81 of the box body. The hinge shafts 13 at both ends of the connecting rod 1 are parallel to the box door rotation shaft 15. The box door 81 is provided with an external operating shaft 10 that is snap-fitted with the circuit breaker operating shaft 11. The adaptive connection between the external operating shaft 10 and the circuit breaker operating shaft 11 in this embodiment is a prior art, and no further details are given. When the box door 81 is closed, the locking plate 5 is located on the side of the circuit breaker operating shaft 11 away from the box door rotation shaft 15, and the external operating shaft 10 is snap-fitted with the circuit breaker operating shaft 11. When the box door is opened, the locking plate 5 blocks the circuit breaker operating shaft 11.

[0027] like Figure 3 As shown, the outer wall of the locking plate 5 is fixedly connected to a locking seat 6, and one end of the connecting rod 1 is hinged to the locking seat 6. The locking seat 6 is an "L"-shaped structure, the vertical wall of the locking seat 6 is fixedly connected to the front side wall of the locking plate 5, and the horizontal wall of the locking seat 6 is hinged to one end of the connecting rod 1. Figure 1 As shown, a mounting seat 14 is fixedly connected to one side of the door 81 near the door rotating shaft 15, and the other end of the connecting rod 1 is hinged to the mounting seat 14. In this embodiment, the locking seat 6 and the mounting seat 14 are both rotatably connected to the hinge shaft 13 through the shaft sleeve, and the two ends of the connecting rod are respectively fixed to the two hinge shafts 13 to realize the hinged rotation of the connecting rod, the locking seat and the mounting seat.

[0028] Working principle: When the power distribution device is normally powered on and used, the box door 81 is closed, the locking plate 5 is located on the side of the circuit breaker operating shaft 11 away from the box door rotating shaft 15, the external operating shaft 10 and the circuit breaker operating shaft 11 are engaged and connected, and the circuit breaker operating shaft 11 is driven to open and close by operating the external operating shaft 10. When maintenance is required, the box door 81 is opened, and the box door 81 rotates to drive the locking plate 5 to slide in the direction close to the circuit breaker operating shaft 11 through the connecting rod 1, so that the locking plate 5 blocks the circuit breaker operating shaft 11 to prevent personnel from accidentally operating the circuit breaker operating shaft 11 to operate and power on, thereby avoiding the risk of electric shock, effectively ensuring the safety of personnel during maintenance, and eliminating safety hazards.

[0029] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be achieved by or by adopting the existing technology, which will not be repeated here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not deviate from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. The locking mechanism of the door circuit breaker of the explosion-proof high-voltage combined vacuum distribution device for mining is characterized by: The locking mechanism comprises a guide rail (2), a locking plate (5) and a connecting rod (1); the guide rail (2) is fixedly connected to a box body (8) of the power distribution device; the locking plate (5) is located outside a circuit breaker operating shaft (11) of the circuit breaker (9) and is slidably connected to the guide rail (2); one end of the connecting rod (1) is hinged to the locking plate (5); the other end of the connecting rod (1) is hinged to a box door (81) of the box body (8); the hinge shafts (13) at both ends of the connecting rod and the rotating shaft (13) of the box door are connected to the connecting rod (1) and the connecting rod (1) is connected to the connecting rod (1). 5), the guide rail (2) extends in a direction perpendicular to the rotating shaft (15) of the box door, the box door (81) is provided with an external operating shaft (10) that is snap-fitted with the circuit breaker operating shaft (11), when the box door is closed, the locking plate (5) is located on a side of the circuit breaker operating shaft (11) away from the box door rotating shaft (15), the external operating shaft (10) and the circuit breaker operating shaft (11) are snap-fitted, and when the box door is opened, the locking plate (5) blocks the circuit breaker operating shaft (11).

2. The locking mechanism for the door-opening circuit breaker of the flameproof high-voltage combined vacuum power distribution device for mining use according to claim 1 is characterized in that: A locking seat (6) is fixedly connected to the outer side wall of the locking plate (5), and the connecting rod (1) and the locking seat (6) are hinged.

3. The locking mechanism for the door-opening circuit breaker of the flameproof high-voltage combined vacuum power distribution device for mining use according to claim 2 is characterized in that: The locking seat (6) is an "L"-shaped structure, the locking seat vertical wall and the front side wall of the locking plate are fixedly connected, and the locking seat horizontal wall and the connecting rod are hinged.

4. The locking mechanism for the door-opening circuit breaker of the flameproof high-voltage combined vacuum power distribution device for mining use according to claim 1 is characterized in that: The guide rail (2) is a tubular structure, a slider (3) is provided in the inner cavity of the guide rail, a sliding hole is opened along the length direction of the guide rail, and the locking plate (5) is fixedly connected with a fixing screw (4), which passes through the sliding hole and is fixedly connected to the slider (3).

5. The locking mechanism for the door-opening circuit breaker of the flameproof high-voltage combined vacuum power distribution device for mining use according to claim 4 is characterized in that: The two ends of the guide rail (2) are fixedly connected to limit posts (12), which are located on the sliding path of the slider (3).

6. The locking mechanism for the door-opening circuit breaker of the flameproof high-voltage combined vacuum power distribution device for mining use according to claim 1 is characterized in that: A mounting plate (7) is fixedly connected to the outer side of the circuit breaker (9), and the guide rail is fixedly connected to the mounting plate.

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