A power-off uncovering protection device for explosion-proof electrical appliances

Abstract

The application provides a power-off uncovering protection device for an explosion-proof electric appliance, and relates to the technical field of electrical explosion prevention. The device comprises an explosion-proof electric appliance power supply main body, upper communicating seats are symmetrically and fixedly installed on the upper ends of the left and right end sidewalls of the explosion-proof electric appliance power supply main body, and an explosion-proof cover plate is horizontally installed between the four upper communicating seats. When explosion or strong vibration occurs, the explosion-proof cover plate can be pushed in to cut off power and uncover, so as to prevent the problem of loss expansion caused by electric short circuit and fire when strong vibration or explosion occurs. The device solves the problem that maintenance personnel often maintain the explosion-proof electric appliance under non-power-off condition in order to facilitate the search for faults under power, which often causes mine accidents and causes serious casualties in flammable and explosive occasions such as coal mines. Moreover, when explosion or strong vibration occurs, if power cannot be cut off in time, a greater disaster may be caused.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical explosion protection, and particularly relates to a power-off and cover-opening protection device for explosion-proof electrical appliances. Background Art

[0002] Explosion-proof electrical appliances are a type of electrical equipment used in places where there are explosive gases and vapors.

[0003] In many cases, in order to facilitate troubleshooting while the power is on, maintenance personnel often perform maintenance on explosion-proof electrical appliances without power-off. In this way, in flammable and explosive places such as coal mines, mine accidents often occur, causing heavy casualties. Moreover, in the event of an explosion or strong vibration, if the power cannot be cut off in time, it may trigger a greater disaster. Summary of the Invention

[0004] In view of this, the present invention provides a power-off and cover-opening protection device for explosion-proof electrical appliances, which has docking terminals and adaptive locking columns, and can prevent the problem of expanded losses caused by electrical short-circuit fires when there is a strong vibration or explosion.

[0005] The present invention provides a power-off and cover-opening protection device for explosion-proof electrical appliances, which specifically includes: an explosion-proof electrical appliance power supply main body; upper connecting seats are symmetrically and fixedly installed at the upper ends of the side walls on the left and right sides of the explosion-proof electrical appliance power supply main body; an explosion-proof cover plate is horizontally installed between the four upper connecting seats; a lower connecting seat is vertically installed at a position on the bottom side wall of the explosion-proof cover plate opposite to the middle of the upper connecting seat; a docking terminal is vertically installed in the lower connecting seat; and adaptive locking columns are horizontally and symmetrically installed at a position slightly below the middle of the lower connecting seat.

[0006] Optionally, a circular docking plate is fixedly installed in the middle of the upper end of the upper connecting seat; a negative terminal is vertically fixedly installed in the middle of the upper end of the docking plate, and the end of the negative terminal has a structure that is narrow at the top and wide at the bottom; a part of the lower end of the negative terminal is a columnar structure with a reduced diameter, and a movable shuttle is slidably sleeved on the columnar structure. The movable shuttle has a structure that is narrow at both the upper and lower ends and wide in the middle, and the outer diameter of the movable shuttle is smaller than the outer diameter of the negative terminal; an ear support plate is vertically fixedly installed on the outer wall of the upper connecting seat.

[0007] Optionally, horizontal holding rods are fixedly installed in the grooves in the middle of the front edge and the rear edge of the explosion-proof cover plate; guide rods are vertically and downwardly fixedly installed at the four corners of the bottom plane of the explosion-proof cover plate, and the lower ends of the guide rods are slidably inserted into the ear support plates; a spring A is sleeved on the guide rods above the ear support plates; buffer rubber columns protruding upward are evenly installed at intervals in the middle of the top plane of the explosion-proof cover plate; and a "hui" - shaped fluorescent strip is sleeved around the explosion-proof cover plate outside the buffer rubber columns.

[0008] Optionally, a sleeve is fixedly installed at the lower middle of the lower connecting seat; vertical grooves are respectively opened at the front and rear ends of the sleeve; a wire-passing groove is opened at the upper end of the sleeve; a central hole is opened in the middle of the sleeve, and the central hole has a structure with two sections of varying diameter, the diameter of the upper section of the central hole being larger than the diameter of the lower section of the central hole.

[0009] Optionally, the upper end of the mating terminal is vertically slidably inserted into the fixing plate, and the fixing plate is fixedly installed at the upper part of the central hole; a baffle is fixedly installed at the lower middle part of the mating terminal, and the diameter of the baffle is consistent with the inner diameter of the upper part of the central hole; a spring B is fitted on the mating terminal between the baffle and the fixing plate; a cuboid-shaped directional sleeve is fixedly connected to the upper end of the mating terminal through the wire groove, and a positive terminal connecting wire connected to the mating terminal passes through the directional sleeve; a positive terminal is fixedly connected to the lower end of the mating terminal, and the lower end of the positive terminal has a truncated cone-shaped structure that is wider at the top and narrower at the bottom.

[0010] Optionally, the outer end of the adaptive locking pin is fixedly connected to the lower end of the groove, a locking rod is vertically slidably sleeved in the adaptive locking pin, a lock head is fixedly connected to the inner end of the locking rod, the inner end of the lock head is a downwardly inclined slope structure, and a spring C is sleeved on the locking rod outside the lock head.

[0011] Beneficial effects

[0012] 1. In this invention, a spring A is fitted on the guide rod above the ear support plate. When maintenance is required, the explosion-proof cover can be pushed down by hand. After pushing it to the bottom, it can be lifted up to open the cover and cut off the power, which can ensure maintenance safety. In the event of an explosion or strong vibration, the explosion-proof cover can be pushed inward to cut off the power and open the cover, so as to prevent the problem of electrical short circuit and fire caused by strong vibration or explosion from expanding the loss.

[0013] 2. In this invention, the inner end of the lock head is a downward-sloping inclined structure. A spring C is fitted on the lock rod on the outer side of the lock head. In its natural state, the docking terminals are kept in contact with the positive terminal by the action of the spring B and the baffle, ensuring normal connection. When vibration or internal thrust occurs, the explosion-proof cover moves the adaptive lock pin downward through the sleeve, and the inner end of the lock head moves along the movable shuttle. When it reaches the lowest position, it quickly disengages and unlocks under the action of the guide rod and the spring A, separating the negative terminal from the positive terminal, achieving a safe protection of power-off separation. This is fast, effective, safe, and convenient.

[0014] 3. In this invention, the lower connecting seat will be locked together with the upper connecting seat, i.e., in the normal power supply state. The lower end of the negative terminal has a groove that fits into the upper end of the movable shuttle. When it encounters an explosive thrust or external force, the locking head will continue to move down with the lower connecting seat, and the locking head will move down along the movable shuttle. At this time, the lower connecting seat is in the movable state. When the lower connecting seat moves up, the locking head pulls the movable shuttle up. After the upper end of the movable shuttle is engaged in the negative terminal, when the shuttle edge is connected to the lower end of the negative terminal, the locking head slides past the movable shuttle and the negative terminal and is in the disengaged state. At this time, it is in the power-off and cover-opening protection state, which can ensure the switching between normal operation and explosion-proof requirements. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0016] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0017] In the attached diagram:

[0018] Figure 1 A schematic diagram of the right front upper axis view structure according to an embodiment of the present invention is shown;

[0019] Figure 2 A schematic diagram of the right front lower axis view structure according to an embodiment of the present invention is shown;

[0020] Figure 3 A schematic axial view of the casing portion in a partially separated state according to an embodiment of the present invention is shown.

[0021] Figure 4 An embodiment according to the present invention is shown. Figure 3 Schematic diagram of the A-section structure;

[0022] Figure 5 A schematic diagram of the explosion-proof cover plate in an upward-facing state according to an embodiment of the present invention is shown.

[0023] Figure 6 A schematic axial view of the explosion-proof cover plate in an upward-moving state according to an embodiment of the present invention is shown.

[0024] Figure 7 A schematic axial view of the upper connecting seat and the sleeve portion in a phase-separated state according to an embodiment of the present invention is shown;

[0025] Figure 8 A front view schematic diagram of the upper connecting seat and sleeve portion in a separated state according to an embodiment of the present invention is shown.

[0026] List of reference numerals

[0027] 1. Explosion-proof electrical power supply body; 2. Upper connecting seat; 201. Connecting plate; 202. Ear support plate; 203. Negative terminal; 204. Movable shuttle; 3. Explosion-proof cover plate; 301. Handle rod; 302. Buffer rubber column; 303. Fluorescent strip; 304. Guide rod; 305. Spring A; 4. Lower connecting seat; 401. Sleeve; 402. Groove; 403. Wire groove; 404. Center hole; 5. Connecting terminal; 501. Fixing plate; 502. Baffle plate; 503. Spring B; 504. Orientation block; 505. Positive connection wire; 506. Positive terminal; 6. Self-adaptive locking pin; 601. Locking rod; 602. Lock head; 603. Spring C. Detailed Implementation

[0028] To make the objectives, solutions, and advantages of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Unless otherwise stated, the terms used herein have their ordinary meanings in the art. The same reference numerals in the drawings represent the same parts.

[0029] Example: Please refer to Figures 1 to 8 :

[0030] This invention proposes a power-off cover protection device for explosion-proof electrical appliances, comprising: an explosion-proof electrical appliance power supply body 1; upper connecting seats 2 symmetrically fixedly installed on the upper ends of the left and right side walls of the explosion-proof electrical appliance power supply body 1; an explosion-proof cover plate 3 horizontally installed between the four upper connecting seats 2; a lower connecting seat 4 vertically installed on the bottom side wall of the explosion-proof cover plate 3 at a position opposite to the middle of the upper connecting seats 2; a docking terminal 5 vertically installed in the lower connecting seat 4; and self-adaptive locking pins 6 horizontally symmetrically installed at the lower middle position of the lower connecting seat 4.

[0031] Furthermore, according to embodiments of the present invention, such as Figure 1 and Figure 4 As shown, a circular docking plate 201 is fixedly installed at the upper middle part of the upper connecting seat 2; a negative end 203 is vertically fixedly installed at the upper middle part of the docking plate 201. The end of the negative end 203 has a structure that is narrow at the top and wide at the bottom, which makes it easy for the lock head 602 to be partially inserted.

[0032] The part at the lower end of the negative terminal 203 is a columnar structure with a reduced diameter. An active shuttle 204 is slidably sleeved on the columnar structure. The active shuttle 204 has a structure that is narrow at both the upper and lower ends and wide in the middle. The outer diameter of the active shuttle 204 is smaller than the outer diameter of the negative terminal 203. When part of the lock head 602 is inserted into the positions of the negative terminal 203 and the active shuttle 204, the lower connecting seat 4 will be in a locked and combined state with the upper connecting seat 2, that is, in the normal power - using state. A groove is provided at the lower end of the negative terminal 203, which is fitted with the upper end of the active shuttle 204. When encountering an explosion thrust or an external force, the lock head 602 will continue to move downward with the lower connecting seat 4, and the lock head 602 will move downward along the active shuttle 204. At this time, the lower connecting seat 4 is in an active state, the lower connecting seat 4 moves upward, the lock head 602 pulls the active shuttle 204 upward. After the upper end of the active shuttle 204 is inserted into the negative terminal 203 and the shuttle edge is connected to the lower annular edge of the negative terminal 203, the lock head 602 slides past the active shuttle 204 and the negative terminal 203 to be in a disconnected state. At this time, it is in a power - off and cover - opening protection state, which can ensure the conversion between normal operation and explosion - proof requirements;

[0033] On the outer wall of the upper connecting seat 2, an ear support plate 202 is vertically and fixedly installed, which can cooperate with the guide rod 304 and the spring A305 to always provide an upward thrust for the explosion - proof cover plate 3, so as to be able to self - unlock and open the cover for power - off protection when encountering vibration or internal thrust.

[0034] In addition, according to an embodiment of the present invention, as Figure 1 、 Figure 5 and Figure 6 shown, transverse grip bars 301 are fixedly installed in the slots in the middle of the front edge and the middle of the rear edge of the explosion - proof cover plate 3; at the four corners of the bottom plane of the explosion - proof cover plate 3, guide rods 304 are vertically and downwardly fixedly installed respectively. The lower ends of the guide rods 304 are slidably inserted into the ear support plate 202; a spring A305 is sleeved on the guide rod 304 above the ear support plate 202. When maintenance of the equipment is required, the explosion - proof cover plate 3 can be pushed down by holding the grip bar 301, and then lifted after reaching the bottom to achieve power - off and cover - opening, which can ensure maintenance safety. When an explosion or strong vibration occurs, the explosion - proof cover plate 3 can be pushed inward to open the cover for power - off, so as to prevent the problem of further loss caused by electric short - circuit fire when strong vibration or explosion occurs;

[0035] In the middle of the top plane of the explosion - proof cover plate 3, buffer rubber columns with an upward convex shape 302 are evenly installed at intervals; a "hui" - shaped fluorescent strip 303 is sleeved on the explosion - proof cover plate 3 outside the buffer rubber column 302. The buffer rubber column 302 can play a role in buffering and earthquake resistance, while the fluorescent strip 303 can play a role in guiding in the dark.

[0036] Furthermore, according to an embodiment of the present invention, a sleeve 401 is fixedly installed at the lower middle part of the lower connecting seat 4; vertical grooves 402 are respectively opened at the front and rear ends of the sleeve 401; a wire-passing groove 403 is opened at the upper end of the sleeve 401 for leading out the wire.

[0037] Furthermore, according to embodiments of the present invention, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 and Figure 8 As shown, the upper end of the mating terminal 5 is vertically slidably inserted into the fixed plate 501, which is fixedly installed at the upper section of the central hole 404; a baffle 502 is fixedly installed at the lower middle part of the mating terminal 5, the diameter of which is the same as the inner diameter of the upper section of the central hole 404; a spring B503 is fitted on the mating terminal 5 between the baffle 502 and the fixed plate 501; a cuboid-shaped directional sleeve 504 is fixedly connected to the upper end of the mating terminal 5 through the wire groove 403, and a positive terminal connecting wire 505 connected to the mating terminal 5 passes through the directional sleeve 504; a positive terminal 506 is fixedly connected to the lower end of the mating terminal 5, the lower end of which is a truncated cone structure wider at the top and narrower at the bottom; a central hole 404 is opened in the middle of the sleeve 401, which is a two-section diameter-changing structure, with the diameter of the upper section of the central hole 404 being larger than that of the lower section. The outer end of the adaptive locking pin 6 is fixedly connected to the lower end of the groove 402. A locking rod 601 is vertically slidably sleeved in the adaptive locking pin 6. A lock head 602 is fixedly connected to the inner end of the locking rod 601. The inner end of the lock head 602 is a downwardly inclined slope structure. A spring C603 is fitted on the locking rod 601 outside the lock head 602. In the natural state, under the action of the spring B503 and the baffle 502, the docking terminal 5 can keep the negative terminal 203 in contact with the positive terminal 506 to ensure normal connection. When vibration or internal thrust occurs, the explosion-proof cover 3 drives the adaptive locking pin 6 to move down through the sleeve 401. The inner end of the lock head 602 moves along the movable shuttle 204. When it reaches the lowest position, it quickly disengages and unlocks under the action of the guide rod 304 and the spring A305. The negative terminal 203 separates from the positive terminal 506, realizing the safety protection of power-off separation. It is fast, effective, safe and convenient.

[0038] The specific usage and function of this embodiment are as follows:

[0039] During the use of the present invention, the negative terminal 203 is connected to the negative pole of the explosion-proof electrical appliance power supply main body 1, and the positive terminal 506 is对接ed to the positive pole connection wire of the explosion-proof electrical appliance power supply main body 1. In the natural state, under the action of the spring B503 and the retaining plate 502, the docking terminal 5 can ensure that the negative terminal 203 is always in contact with the positive terminal 506, guaranteeing normal connection. When vibration or internal thrust occurs, the explosion-proof cover plate 3 drives the adaptive locking column 6 to move downward through the sleeve 401, and the inner end of the lock head 602 moves along the movable shuttle 204. When reaching the lowest position, it quickly disengages and unlocks upward under the action of the guide rod 304 and the spring A305, and the negative terminal 203 is separated from the positive terminal 506. When encountering explosion thrust or external force, the lock head 602 will continue to move downward with the lower connection seat 4, and the lock head 602 will move downward along the movable shuttle 204. At this time, the lower connection seat 4 is in an active state, and the lower connection seat 4 moves upward. The lock head 602 pulls the movable shuttle 204 to move upward. After the upper end of the movable shuttle 204 is caught in the negative terminal 203 and the edge of the shuttle contacts the lower annular edge of the negative terminal 203, the lock head 602 slides past the movable shuttle 204 and the negative terminal 203 is in a disconnected state. In addition, buffer rubber columns 302 protruding upward are uniformly fixed in the middle of the top plane of the explosion-proof cover plate 3 at intervals; a fluorescent strip 303 in the shape of a "hui" character is sleeved on the explosion-proof cover plate 3 outside the buffer rubber columns 302. The buffer rubber columns 302 can play a role in buffering and earthquake resistance, and the fluorescent strip 303 can play a role in guiding in the dark.

[0040] Finally, it should be noted that when describing the positions of various components and their cooperation relationships, etc. in the present invention, usually one / a pair of components are taken as examples. However, those skilled in the art should understand that such positions, cooperation relationships, etc. are equally applicable to other components / other pairs of components.

[0041] The above description is only an exemplary embodiment of the present invention and is not used to limit the protection scope of the present invention. The protection scope of the present invention is determined by the appended claims.

Claims

1. A power-off uncovering protection device for an explosion-proof electrical appliance, characterized by comprising: Include: Explosion-proof electrical power supply body (1); the upper end of the left and right two end side wall of the explosion-proof electrical power supply body (1) is symmetrically fixedly installed with upper communication seat (2); four upper communication seats (2) are transversely installed with explosion-proof cover plate (3); the bottom side wall of the explosion-proof cover plate (3) is vertically installed with lower communication seat (4) at the position opposite to the middle part of the upper communication seat (2); the lower communication seat (4) is vertically installed with butt joint terminal (5); the lower part of the middle part of the lower communication seat (4) is horizontally symmetrically installed with self-adaptive lock column (6) again; The upper end of the upper communication seat (2) is fixedly installed with a circular butt joint disc (201); the upper end of the butt joint disc (201) is vertically fixedly installed with a negative terminal (203), and the tail end of the negative terminal (203) is of a structure that is narrow at the top and wide at the bottom; The lower end of the negative terminal (203) is partially of a columnar structure with a reduced diameter, a movable shuttle (204) is slidingly sleeved on the columnar structure, the movable shuttle (204) is of a structure that is narrow at the top and bottom and wide in the middle, and the outer diameter of the movable shuttle (204) is smaller than that of the negative terminal (203); The front edge middle part and the rear edge middle part of the explosion-proof cover plate (3) are fixedly installed with horizontal handle rods (301) in the notches; the bottom plane of the explosion-proof cover plate (3) is fixedly installed with guide rods (304) downward at the four corners, the lower ends of the guide rods (304) are slidingly inserted into the ear support plates (202); the guide rods (304) above the ear support plates (202) are sleeved with spring A (305); The upper end of the butt joint terminal (5) is vertically slidingly inserted into the fixed disc (501), the fixed disc (501) is fixedly installed at the upper segment position of the center hole (404); the middle lower part of the butt joint terminal (5) is fixedly installed with a blocking disc (502), the diameter of the blocking disc (502) is consistent with the inner diameter of the upper segment of the center hole (404); the butt joint terminal (5) between the blocking disc (502) and the fixed disc (501) is sleeved with spring B (503); the upper end of the butt joint terminal (5) is vertically forward through the threading groove (403) and fixedly connected with a cuboid directional sleeve block (504), the directional sleeve block (504) is connected with a positive connection wire (505) in communication with the butt joint terminal (5); the lower end of the butt joint terminal (5) is fixedly connected with a positive terminal (506), and the lower end of the positive terminal (506) is of a truncated cone structure that is wide at the top and narrow at the bottom; The outer end of the self-adaptive lock column (6) is fixedly connected at the lower end position of the strip groove (402), the lock rod (601) is vertically slidingly sleeved in the self-adaptive lock column (6), the inner end of the lock rod (601) is fixedly connected with a lock head (602), the inner end of the lock head (602) is of an inclined surface structure that is inclined downward, and the lock rod (601) outside the lock head (602) is sleeved with spring C (603).

2. The power-off and cover opening protection device for explosion-proof electrical apparatus according to claim 1, characterized in that: The outer wall of the upper communication seat (2) is vertically fixedly installed with an ear support plate (202).

3. The power-off and cover-open protection device for explosion-proof electrical apparatus according to claim 1, characterized in that: The upper convex buffer rubber column (302) is fixedly installed in the middle of the top plane of the explosion-proof cover plate (3) in a uniform interval; and the "H" shaped fluorescent strip (303) is annularly sleeved on the explosion-proof cover plate (3) outside the buffer rubber column (302).

4. The de-energizing cover opening protection device for explosion-proof electrical apparatus according to claim 1, characterized by: The lower end middle part of the lower communication seat (4) is fixedly installed with a sleeve (401); the front and rear ends of the sleeve (401) are respectively provided with vertical strip grooves (402); the upper end of the sleeve (401) is transversely provided with a threading groove (403); and the middle part of the sleeve (401) is provided with a center hole (404), which is a structure with two sections of different diameters, and the diameter of the upper section center hole (404) is larger than that of the lower section center hole (404).

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