Front door locking mechanism of mining flame-proof and intrinsically safe high-voltage combined vacuum power distribution device

Abstract

The utility model relates to a front door locking mechanism of a mining flame-proof and intrinsically safe high-voltage combined vacuum power distribution device, which comprises a locking plate transversely connected to a front door in a sliding manner, and a limiting structure matched with a rotating shaft of a front door lock to limit the sliding of the locking plate, and the locking plate is provided with mounting holes which are arranged corresponding to the bolts and are transversely arranged with the corresponding bolts. When the locking device is used, the circuit breaker is in a working position and in a closing state, the through hole is located on one side of the bolt, namely, the bolt is shielded by the locking plate, so that a worker cannot dismount the bolt, and meanwhile, due to limitation of the circuit breaker, the front door lock rotating shaft cannot rotate, and the limiting structure limits transverse movement of the locking plate; therefore, the worker cannot push the locking plate to move. And when the circuit breaker is in the test position, the circuit breaker is in an opening state, and the circuit breaker relieves the constraint on the front door lock rotating shaft, so that the front door lock rotating shaft can rotate, the locking plate does not shield the bolt any more, and the bolt is disassembled at the test position.

Description

Technical Field

[0001] The utility model relates to the mining field, in particular to a front door locking mechanism of a mining explosion-proof and intrinsically safe high-voltage combined vacuum power distribution device. Background Art

[0002] In the environment of explosive mixed gases such as methane and coal dust in coal mines and their surrounding media, the safety of the coal mine power supply system becomes more and more important.

[0003] The mining explosion-proof and intrinsically safe combined high-voltage vacuum distribution device plays an increasingly important role in the coal mine power supply system. The use environment determines that this type of equipment has a safe and reliable mechanism to ensure the safe operation of the equipment. The existing equipment includes a cabinet and a front door connected to the cabinet by bolts. The front door is provided with an observation hole and a display light. The front door lock shaft extends into the cabinet and cooperates with the mechanical locking structure in the circuit breaker in the cabinet. That is, when the equipment is running, the circuit breaker is in the working position and in the closed state, and the front door lock shaft cannot rotate. When the circuit breaker is in the test position, it is in the open state, which releases the restraint on the front door lock shaft, so the front door lock shaft can rotate.

[0004] During maintenance, the front door needs to be removed from the cabinet body before maintenance can be carried out, and maintenance requires power off. However, the bolts of the front door of the current equipment can be removed when the circuit breaker is in the test position and the working position, so there is a safety hazard. Utility Model Content

[0005] The utility model aims at the deficiencies of the prior art and provides a front door locking mechanism of a mine explosion-proof and intrinsically safe high-voltage combined vacuum power distribution device. The bolts can be removed only when the circuit breaker is in the test position, thereby ensuring the safety during maintenance.

[0006] The utility model is realized through the following technical scheme: a front door locking mechanism of a mine explosion-proof and intrinsically safe high-voltage combined vacuum distribution device, wherein the front door is connected to a cabinet body by bolts, and comprises a locking plate which is laterally slidably connected to the front door, and a limiting structure which cooperates with a front door lock shaft to limit the sliding of the locking plate, wherein the locking plate is provided with mounting holes which are arranged corresponding to the bolts and are laterally arranged with the corresponding bolts.

[0007] When the utility model is in use, when the equipment is running, the circuit breaker is in the working position and in the closed state, the through hole is located on one side of the bolt, that is, the bolt is blocked by the locking plate, so the staff cannot remove the bolt. At the same time, due to the restriction of the circuit breaker, the front door lock shaft cannot rotate, and the limiting structure restricts the lateral movement of the locking plate, so the staff cannot push the locking plate to move, that is, the bolt is always blocked by the locking plate, thereby ensuring that the bolt cannot be removed when in the working position;

[0008] When the circuit breaker is in the test position, it is in the open state. The circuit breaker releases the restraint on the front door lock shaft, so the front door lock shaft can rotate. At this time, the limit structure releases the restriction on the locking plate. After the locking plate moves horizontally, the bolt is located directly behind the mounting hole, so that the locking plate no longer blocks the bolt, thereby realizing the removal of the bolt in the test position.

[0009] Preferably, the limiting structure includes a through hole opened on the locking plate, the through hole includes a display hole, and a limiting hole connected to the display hole and for the insertion of a limiting section of the front door lock shaft, the limiting section extends laterally, and the limiting hole includes a second hole section whose height is less than the lateral length of the limiting section, and a first hole section whose height is greater than the height of the limiting section, and the second hole section is located between the limiting section and the first hole section.

[0010] When this preferred solution is in use, in the working position, the limit section extends in the height direction. When the locking plate moves laterally, since the height of the second hole section is smaller than the length of the locking plate, the locking plate presses against the limit section, thereby limiting the lateral movement of the locking plate. When in the test position, the front door lock shaft is rotated to extend the limit section laterally. At this time, after the locking plate moves laterally, the limit section is inserted into the second hole section and the first hole section in turn, thereby releasing the restriction of the locking plate.

[0011] Preferably, the display light and the observation hole on the front door are both located behind the display hole. The preferred solution reduces the weight of the locking plate through the arrangement of the display hole, while not affecting the observation of the display light and the observation hole.

[0012] Preferably, the locking plate is provided with long holes arranged in a rectangular shape and extending laterally, a pin connected to the front door is passed through the long holes, and a limit block with a diameter greater than the height of the long hole is fixed to the end face of the pin away from the front door.

[0013] This preferred solution facilitates the sliding of the locking plate on the front door by providing the long hole and the pin shaft. Preferably, the distance between the limit block and the front door is adapted to the thickness of the locking plate.

[0014] The arrangement of this preferred solution prevents the locking plate from shaking in the front-to-back direction, thereby ensuring stability. Preferably, the diameter of the mounting hole is larger than the diameter of the bolt head. This preferred solution facilitates the disassembly and assembly of the bolt through the mounting hole.

[0015] The beneficial effects of the utility model are as follows: when the equipment is running, the circuit breaker is in the working position and in the closed state, and the through hole is located on one side of the bolt, that is, the bolt is blocked by the locking plate, so the staff cannot remove the bolt. At the same time, due to the limitation of the circuit breaker, the front door lock shaft cannot rotate, and the limiting structure limits the lateral movement of the locking plate, so the staff cannot push the locking plate to move, that is, the bolt is always blocked by the locking plate, thereby ensuring that the bolt cannot be removed when in the working position; and when the circuit breaker is in the test position and in the open state, the circuit breaker releases the constraint on the front door lock shaft, so the front door lock shaft can rotate, and at this time the limiting structure releases the restriction on the locking plate, and after the locking plate moves laterally, the bolt is located directly behind the mounting hole, so that the locking plate no longer blocks the bolt, thereby realizing the removal of the bolt in the test position. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0017] Figure 2 is a schematic front view of a locking plate;

[0018] Figure 3 It is a schematic diagram of the main view of the limiting section and the limiting hole;

[0019] Figure 4 It is a side view schematic diagram of the limit section;

[0020] As shown in the figure:

[0021] 1. Front door, 2. Pin shaft, 3. Locking plate, 4. Handle, 5. Long hole, 6. Bolt, 7. Mounting hole, 8. Display hole, 9. Second hole section, 10. First hole section, 11. Limiting section, 12. Front door lock shaft. DETAILED DESCRIPTION

[0022] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0023] See attached Figure 1-4 The utility model discloses a front door locking mechanism of a mine explosion-proof and intrinsically safe high-voltage combined vacuum distribution device. The front door is connected to the cabinet by bolts 6. The front door lock shaft 12 extends into the cabinet and cooperates with the mechanical locking structure in the circuit breaker in the cabinet. The mechanical locking structure is a prior art. When the equipment is running, the circuit breaker is in the working position and is in the closed state. The mechanical locking structure restricts the front door lock shaft 12 from rotating. When the circuit breaker is in the test position and is in the open state, the mechanical locking structure releases the restraint on the front door lock shaft 12, so the front door lock shaft 12 can rotate.

[0024] The front door locking structure includes a locking plate 3, which is provided with long holes 5 arranged in a rectangular shape and extending in the transverse direction. A pin shaft 2 connected to the front door is passed through the long hole 5. A limit block with a diameter greater than the height of the long hole 5 is fixedly connected to the end surface of the pin shaft 2 away from the front door. The distance between the limit block and the front door is adapted to the thickness of the locking plate 3, so that the locking plate 3 can slide on the front door.

[0025] The locking plate 3 is provided with mounting holes 7 which are arranged corresponding to the bolts 6 and are arranged transversely to the bolts 6 . The diameter of the mounting holes 7 is larger than the diameter of the heads of the bolts 6 .

[0026] A through hole is provided on the locking plate 3, and the through hole includes a display hole 8 and a limiting hole connected to the display hole 8. The position of the front door lock shaft 12 opposite to the limiting hole is a limiting column, and the top and bottom surfaces of the limiting column are provided with relatively set grooves. The setting of the two grooves makes the limiting column with a circular cross-section become a limiting section 11 with a flat top and bottom. The length of the limiting section 11 is the diameter of the front door lock shaft 12, and the width of the limiting section 11 is the distance between the bottoms of the two grooves. The limiting section 11 is inserted into the display hole 8.

[0027] The limiting hole includes a second hole segment 9 whose height is less than the transverse length of the limiting segment 11 and a first hole segment 10 whose height is greater than the height of the limiting segment 11 . The second hole segment 9 is located between the limiting segment 11 and the first hole segment 10 .

[0028] When in the working position, the limiting section 11 extends in the height direction, and when in the testing position, the limiting section 11 extends in the lateral direction.

[0029] The first hole segment 10 and the second hole segment 9 both extend in the transverse direction, and the symmetry lines of the first hole segment 10 and the second hole segment 9 extending in the transverse direction are collinearly arranged, and the symmetry lines are perpendicularly arranged to the axis of the front door lock shaft 12, and the limiting hole and the limiting segment 11 form a limiting structure that cooperates with the front door lock shaft 12 to limit the sliding of the locking plate 3.

[0030] The display light and the observation hole on the front door are both located behind the display hole 8 , and a handle 4 is also fixedly connected to the front door lock shaft 12 .

[0031] When the utility model is in use, when the equipment is running, the circuit breaker is in the working position and in the closed state, and the through hole is located on one side of the bolt 6, that is, the bolt 6 is blocked by the locking plate 3, so the staff cannot remove the bolt 6. At the same time, restricted by the circuit breaker, the front door lock shaft 12 cannot rotate. Since the limiting section 11 extends in the height direction at this time, when the locking plate 3 moves horizontally, since the height of the second hole section 9 is less than the length of the locking plate 3, the locking plate 3 is pressed against the limiting section 11, thereby limiting the horizontal movement of the locking plate 3. Therefore, the staff cannot push the locking plate 3 to move, that is, the bolt 6 is always blocked by the locking plate 3, thereby ensuring that the bolt 6 cannot be removed when in the working position;

[0032] When the circuit breaker is in the test position, it is in the open state. The circuit breaker releases the restraint on the front door lock shaft 12, so the front door lock shaft 12 can rotate. The front door lock shaft 12 is rotated to extend the limit section 11 laterally. At this time, after the locking plate 3 moves laterally, the limit section 11 is inserted into the second hole section 9 and the first hole section 10 in turn, thereby releasing the restriction of the locking plate 3. After the locking plate 3 moves laterally, the bolt 6 is located directly behind the mounting hole 7, so that the locking plate 3 no longer blocks the bolt 6, thereby realizing the removal of the bolt 6 in the test position.

[0033] 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. A front door locking mechanism for a flameproof and intrinsically safe high-voltage combined vacuum power distribution device for use in mines, wherein the front door is connected to the cabinet body by bolts (6), and is characterized in that: The invention comprises a locking plate (3) slidably connected to the front door in a transverse direction, and a limiting structure cooperating with a front door lock rotating shaft (12) to limit the sliding movement of the locking plate (3); the locking plate (3) is provided with a mounting hole (7) which is arranged corresponding to the bolt (6) and is arranged transversely with the corresponding bolt (6).

2. The front door locking mechanism of the explosion-proof and intrinsically safe high-voltage combined vacuum power distribution device for mining according to claim 1 is characterized in that: The limiting structure comprises a through hole formed on the locking plate (3), the through hole comprising a display hole (8), and a limiting hole communicating with the display hole (8) and for inserting a limiting section (11) of a front door lock shaft (12), the limiting section (11) extending in a transverse direction, the limiting hole comprising a second hole section (9) having a height less than a transverse length of the limiting section (11), and a first hole section (10) having a height greater than a height of the limiting section (11), the second hole section (9) being located between the limiting section (11) and the first hole section (10).

3. The front door locking mechanism of the explosion-proof and intrinsically safe high-voltage combined vacuum power distribution device for mining use according to claim 2 is characterized in that: The display light and the observation hole on the front door are both located behind the display hole (8).

4. The front door locking mechanism of the explosion-proof and intrinsically safe high-voltage combined vacuum power distribution device for mining use according to claim 1 is characterized in that: The locking plate (3) is provided with long holes (5) arranged in a rectangular shape and extending in a transverse direction, a pin shaft (2) connected to the front door is passed through the long hole (5), and a limit block having a diameter greater than the height of the long hole (5) is fixedly connected to the end surface of the pin shaft (2) away from the front door.

5. The front door locking mechanism of the explosion-proof and intrinsically safe high-voltage combined vacuum power distribution device for mining use according to claim 4 is characterized in that: The distance between the limit block and the front door is adapted to the thickness of the locking plate (3).

6. The front door locking mechanism of the explosion-proof and intrinsically safe high-voltage combined vacuum power distribution device for mining use according to claim 1 is characterized in that: The diameter of the mounting hole (7) is larger than the diameter of the head of the bolt (6).

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