Explosion-proof isolating switch box capable of automatically powering off when door is opened

Abstract

The invention discloses an explosion-proof isolating switch box capable of automatically powering off when a door is opened, which comprises a closing mechanism, the closing mechanism comprises a box body and a box door, the box body and the box door are independently arranged, four corners of the left end of the box door are fixedly connected with sliding rods, the box body is provided with sliding chutes matched with the sliding rods, and the sliding chutes are fixedly connected with the box door. The left end of the box door is fixedly connected with a sealing top plate, a cavity is formed in the sealing top plate, two bidirectional threaded rods are arranged in the cavity and are in transmission connection through a transmission mechanism, the front side and the rear side of the sealing top plate are each provided with two grooves, and clamping blocks are slidably connected into the four grooves; and four clamping grooves matched with the four clamping blocks respectively are formed in the side wall of the box body. When the explosion-proof isolation box is opened, the interior of the explosion-proof isolation box is powered off, sparks are avoided when the door is opened and closed, and the safety is high.

Description

Technical Field

[0001] This invention relates to the field of explosion-proof isolation box technology, and in particular to an explosion-proof isolation switch box that automatically cuts off power when the door is opened. Background Technology

[0002] There are many sub-names for explosion-proof boxes, such as explosion-proof distribution boxes, explosion-proof control boxes, and explosion-proof distribution cabinets. Manufacturers usually determine the product name based on the usage. An explosion-proof isolating switch box is a type of power distribution equipment equipped with an isolating switch. When performing electrical work in places prone to safety hazards, such as mines and textile factories, it is necessary to prevent dangers such as flammable gas and dust explosions. Therefore, the safety requirements for electrical equipment in these places are higher, and it is necessary to ensure the safety of the power distribution cabinet used in these locations.

[0003] When existing explosion-proof isolation boxes are opened in environments containing a lot of dust or flammable gases, the power supply remains connected, which can easily lead to electric leakage and safety hazards. In addition, most existing explosion-proof isolation boxes use mechanical rotating doors, and over time, the paint on the surface can wear off due to friction. During rotation, sparks can be generated, increasing the danger caused by opening and closing the doors.

[0004] To address this issue, we propose an explosion-proof isolation switch box that automatically cuts off power when the door is opened. Summary of the Invention

[0005] The purpose of this invention is to solve the problem in the prior art that when an explosion-proof isolation box is working in a dusty or flammable gas environment, the power supply remains connected when the box door is opened and closed, and the opening and closing of the box door is prone to sparks, which is quite dangerous. Therefore, this invention proposes an explosion-proof isolation switch box that automatically cuts off the power when the door is opened.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An explosion-proof isolating switch box with automatic power-off upon opening includes a closing mechanism. The closing mechanism comprises a box body and a door, which are independently configured. Sliding rods are fixedly connected to the four corners of the left end of the door. The box body has sliding grooves that match the sliding rods. A sealing top plate is fixedly connected to the left end of the door. The sealing top plate has a cavity containing two bidirectional threaded rods. The two bidirectional threaded rods are connected by a transmission mechanism. The sealing top plate has two grooves on both its front and rear sides. Each groove is slidably connected with a snap-fit ​​block. The side wall of the box has four slots that match the four snap-fit ​​blocks respectively. The two ends of the two bidirectional threaded rods rotatably pass through the sealing top plate and extend into the four grooves and are threadedly connected to the four snap-fit ​​blocks. A rotating rod is provided in the cavity. The rotating rod is connected to one of the bidirectional threaded rods through a bevel gear set. The right side wall of the box door has a placement groove. A rotating handle is provided in the placement groove. One end of the rotating rod rotatably passes through the sealing top plate and the box door and is fixedly connected to the rotating handle on the same axis.

[0007] Preferably, the transmission mechanism includes two pulleys connected by a belt drive, and the two pulleys are respectively coaxially fixedly connected to two bidirectional threaded rods.

[0008] Preferably, the bevel gear set includes a first bevel gear and a second bevel gear that mesh with each other, the first bevel gear being coaxially and fixedly connected to the rotating rod, and the second bevel gear being coaxially and fixedly connected to the bidirectional threaded rod.

[0009] Preferably, both of the snap-fit ​​blocks are provided with threaded holes that match the bidirectional threaded rod, and the threads in the two threaded holes are in opposite directions.

[0010] Preferably, the device further includes a power-off mechanism, which comprises two L-shaped grooves on the inner sidewall of the housing. An L-shaped plate is slidably connected to each L-shaped groove, and a push plate is rotatably connected within each L-shaped groove. The push plate matches the L-shaped plate. A transmission cavity is provided inside the housing, and a rotating shaft is rotatably connected within the transmission cavity. A first winding roller and a second winding roller are coaxially and fixedly connected to the outside of the rotating shaft. A first pull rope is fixedly connected to one end of each L-shaped plate, and the end of the first pull rope away from the L-shaped plate slides through the housing and is fixedly wound around the first winding roller. A power-on cavity is provided inside the housing, and two power-on plates are slidably connected within the power-on cavity. Both power-on plates are electrically connected to a solenoid valve located inside the housing. A power-on indicator light is installed at the top of the housing, and the power-on indicator light is electrically connected to both power-on plates. A reset mechanism for resetting the power-on plates is provided inside the power-on cavity. A second pull rope is fixedly connected to the sidewall of each power-on plate, and the end of the second pull rope away from the power-on plate slides through the housing and is fixedly wound around the second winding roller.

[0011] Preferably, the reset mechanism includes two reset slots disposed on the inner sidewall of the electrical contact cavity. A limit rod is fixedly connected in the reset slot. A reset spring and a sliding plate are disposed on the outer sleeve of the limit rod. The sliding plate is slidably connected to both the reset slot and the limit rod. The two ends of the reset spring are fixedly connected to the reset slot and the sliding plate, respectively. The end of the sliding plate away from the reset slot is fixedly connected to the electrical contact plate.

[0012] Preferably, the push plate is rotatably connected to the inner wall of the L-shaped groove via an automatic reset rotating shaft.

[0013] Preferably, the rotating shaft is rotatably connected to the inner wall of the transmission cavity via a spiral spring.

[0014] Preferably, the opposite sidewalls of the two junction boards are provided with mortises and tenons, and the mortises and tenons are matched.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By setting a power-off mechanism, when the box door is opened, the sealing top plate leaves the box body and does not limit the push plate. The push plate rotates and drives the L-shaped plate to move until it reaches the appropriate position. At the same time, under the action of the spiral spring, the rotating shaft rotates, which drives the first winding roller and the second winding roller to rotate. The first winding roller loosens the first pull rope, and the second winding roller winds the second pull rope. The second pull rope drives the grounding plate to move, so that the two grounding plates separate. Thus, the solenoid valve set in the box body cuts off the power to the box body. When the explosion-proof isolation box is opened, there will be no leakage of electricity, which improves the safety of use in hazardous environments. 2. By setting up a closing mechanism, the rotating handle drives the rotating rod to rotate, which in turn drives two bidirectional threaded rods to rotate. The two bidirectional threaded rods drive four locking blocks to move relative to each other. The four locking blocks move out of the slots and then out of the door, thus separating the box body and the door. During the opening process, no sparks will be generated, improving the safety of opening and closing the door.

[0016] When the explosion-proof isolation box is opened, the power is cut off inside, and no sparks are generated when the door is opened or closed, thus ensuring a high level of safety. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural view of an explosion-proof isolation switch box with automatic power-off when the door is opened, as proposed in this invention. Figure 2 This is a front structural perspective view of an explosion-proof isolation switch box with automatic power-off when the door is opened, as proposed in this invention. Figure 3 This is a top perspective view of an explosion-proof isolation switch box with automatic power-off when the door is opened, as proposed in this invention. Figure 4 This is a perspective view of the structure of the door of an explosion-proof isolation switch box with automatic power cut-off when the door is opened, as proposed in this invention. Figure 5 This is a side perspective view of an explosion-proof isolation switch box with automatic power-off function when the door is opened, as proposed in this invention. Figure 6 This is a three-dimensional structural view of the L-shaped plate in an explosion-proof isolating switch box that automatically cuts off power when the door is opened, as proposed in this invention.

[0018] In the diagram: 1. Box body, 2. Box door, 3. Slide rod, 4. Slide groove, 5. Sealed top plate, 6. Cavity, 7. Bidirectional threaded rod, 8. Transmission mechanism, 9. Groove, 10. Snap block, 11. Rotating rod, 12. Bevel gear set, 13. Placement groove, 14. Rotating handle, 15. Pulley, 16. First bevel gear, 17. Second bevel gear, 18. L-shaped groove, 19. L-shaped plate, 20. Push plate, 21. Transmission cavity, 22. Rotating shaft, 23. First winding roller, 24. Second winding roller, 25. First pull rope, 26. Electrical connection cavity, 27. Electrical connection plate, 28. Reset mechanism, 29. Second pull rope, 30. Reset groove, 31. Limiting rod, 32. Reset spring, 33. Slide plate, 34. Snap groove, 35. Electrical connection indicator light. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Reference Figure 1-6 An explosion-proof isolation switch box with automatic power-off upon opening includes a closing mechanism, comprising a box body 1 and a door 2, which are independently configured. Each of the four corners of the left end of the door 2 is fixedly connected to a sliding rod 3. The box body 1 has sliding grooves 4 that match the sliding rods 3. A sealing top plate 5 is fixedly connected to the left end of the door 2. The sealing top plate 5 has a cavity 6, and two bidirectional threaded rods 7 are located within the cavity 6. The two bidirectional threaded rods 7 are connected by a transmission mechanism 8. The transmission mechanism 8 includes two pulleys 15 connected by a belt drive. Each pulley 15 is coaxially fixedly connected to one of the two bidirectional threaded rods 7. The sealing top plate 5 has two grooves 9 on both its front and rear sides, and four locking blocks 10 are slidably connected within each of the four grooves 9. Notably, each locking block 10 has a threaded hole that matches the bidirectional threaded rod 7, and the threads in the two threaded holes rotate in opposite directions.

[0021] In this invention, the side wall of the housing 1 is provided with four slots 34 that respectively match four snap-fit ​​blocks 10. The two ends of the two bidirectional threaded rods 7 are respectively rotatably passed through the sealing top plate 5 and extended into the four grooves 9 and are threadedly connected to the four snap-fit ​​blocks 10. The cavity 6 is provided with a rotating rod 11. The rotating rod 11 is connected to one of the bidirectional threaded rods 7 through a bevel gear set 12. It should be noted that the bevel gear set 12 includes a first bevel gear 16 and a second bevel gear 17 that mesh with each other. The first bevel gear 16 is coaxially fixedly connected to the rotating rod 11, and the second bevel gear 17 is coaxially fixedly connected to the bidirectional threaded rod 7. The right side wall of the housing door 2 is provided with a placement groove 13. The placement groove 13 is provided with a rotating handle 14. One end of the rotating rod 11 rotatably passes through the sealing top plate 5 and the housing door 2 and is coaxially fixedly connected to the rotating handle 14. It should be noted that a power-off mechanism is also included. The power-off mechanism includes two L-shaped grooves 18 provided on the inner side wall of the housing 1.

[0022] In this invention, an L-shaped plate 19 is slidably connected to an L-shaped groove 18, and a push plate 20 is rotatably connected inside the L-shaped groove 18. Further, the push plate 20 is rotatably connected to the inner wall of the L-shaped groove 18 via an automatic reset rotating shaft. The push plate 20 matches the L-shaped plate 19. A transmission cavity 21 is provided inside the housing 1, and a rotating shaft 22 is rotatably connected inside the transmission cavity 21. It is worth mentioning that the rotating shaft 22 is rotatably connected to the inner wall of the transmission cavity 21 via a spiral spring. A first winding roller 23 and a second winding roller 24 are coaxially fixedly connected to the outside of the rotating shaft 22. A first pull rope 25 is fixedly connected to one end of the L-shaped plate 19. The end of the first pull rope 25 away from the L-shaped plate 19 slides through the housing 1 and is fixedly wound around the first winding roller 23. An electrical receiving cavity 26 is provided inside the housing 1, and two electrical receiving plates 27 are slidably connected inside the electrical receiving cavity 26. It should be noted that the opposite sidewalls of the two electrical receiving plates 27 are respectively provided with mortises and tenons, and the mortises and tenons match.

[0023] In this invention, both grounding plates 27 are electrically connected to the solenoid valve installed inside the housing 1. A grounding indicator light 35 is installed at the upper end of the housing 1, and the grounding indicator light 35 is electrically connected to both grounding plates 27. A reset mechanism 28 for resetting the grounding plates 27 is provided inside the grounding cavity 26. It should be noted that the reset mechanism 28 includes two reset grooves 30 provided on the inner side wall of the grounding cavity 26. A limit rod 31 is fixedly connected inside the reset groove 30. A reset spring 32 and a sliding plate 33 are sleeved on the limit rod 31. The sliding plate 33 is slidably connected to the reset groove 30 and the limit rod 31. The two ends of the reset spring 32 are fixedly connected to the reset groove 30 and the sliding plate 33, respectively. The end of the sliding plate 33 away from the reset groove 30 is fixedly connected to the grounding plate 27. A second pull rope 29 is fixedly connected to the side wall of the grounding plate 27. The end of the second pull rope 29 away from the grounding plate 27 slides through the housing 1 and is fixedly wound with the second winding roller 24.

[0024] In this invention, the rotating handle 14 drives the rotating rod 11 to rotate, the rotating rod 11 drives the first bevel gear 16 to rotate, the first bevel gear 16 drives the second bevel gear 17 to rotate, and the second bevel gear 17 drives one of the bidirectional threaded rods 7 to rotate. One of the bidirectional threaded rods 7 drives the other bidirectional threaded rod 7 to rotate through two pulleys 15 and a belt. The two bidirectional threaded rods 7 drive the four locking blocks 10 to move relative to each other. When the four locking blocks 10 move out of the slots 34, the box door 2 can be removed to separate the box body 1 from the box door 2. When the box door 2 is opened, the sealing top plate 5 leaves the box body 1 and does not limit the push plate 20. The push plate 20 rotates and drives the L-shaped plate 19 to move until it is in the appropriate position. At the same time, under the action of the spiral spring, the rotating shaft 22 rotates, which drives the first winding roller 23 and the second winding roller 24 to wind and unwind. The first winding roller 23 loosens the first pull rope 25, and the second winding roller 24 winds the second pull rope 29. The second pull rope 29 drives the electrical plate 27 to move, causing the two electrical plates 27 to separate, thereby cutting off the power to the box 1 through the solenoid valve set in the box 1. When the box door 2 is closed, the sealing top plate 5 pushes the two push plates 20 to rotate. The push plates 20 drive the two electrical plates 27 to move through the L-shaped plate 19, the first pull rope 25, and the second pull rope 29 until the two electrical plates 27 come into contact. At this time, the box 1 is powered on, and the power indicator light 35 is lit.

[0025] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An explosion-proof isolating switch box with automatic power-off when the door is opened, comprising a closing mechanism, characterized in that, The closing mechanism comprises a box (1) and a box door (2), the box (1) and the box door (2) are independently arranged, the left end of the box door (2) is fixedly connected with slide rods (3) at four corners, the box (1) is provided with slide grooves (4) matched with the slide rods (3), the left end of the box door (2) is fixedly connected with a sealing top plate (5), the sealing top plate (5) is provided with a cavity (6), two bidirectional threaded rods (7) are arranged in the cavity (6), the two bidirectional threaded rods (7) are drivingly connected through a transmission mechanism (8), the front and rear sides of the sealing top plate (5) are provided with two recesses (9), the four recesses (9) are slidingly connected with clamping blocks (10), the sidewall of the box (1) is provided with four clamping grooves (34) matched with the four clamping blocks (10), the two ends of the two bidirectional threaded rods (7) are respectively rotatably extended into the four recesses (9) through the sealing top plate (5) and are threadedly connected with the four clamping blocks (10), the cavity (6) is provided with a rotating rod (11), the rotating rod (11) and one of the bidirectional threaded rods (7) are drivingly connected through a bevel gear set (12), the right sidewall of the box door (2) is provided with a placing groove (13), the placing groove (13) is provided with a rotating handle (14), one end of the rotating rod (11) is rotatably extended through the sealing top plate (5) and the box door (2) and is coaxially fixedly connected with the rotating handle (14).

2. The explosion-proof isolating switch box of claim 1, wherein, The transmission mechanism (8) comprises two belt pulleys (15), the two belt pulleys (15) are drivingly connected through a belt, and the two belt pulleys (15) are coaxially fixedly connected with the two bidirectional threaded rods (7).

3. The explosion-proof isolating switch box of claim 1, wherein, The bevel gear set (12) comprises a first bevel gear (16) and a second bevel gear (17) which are meshed with each other, the first bevel gear (16) is coaxially fixedly connected with the rotating rod (11), and the second bevel gear (17) is coaxially fixedly connected with the bidirectional threaded rod (7).

4. The explosion-proof disconnecting switch box of claim 1, wherein, Threaded holes matched with the bidirectional threaded rods (7) are arranged in the two clamping blocks (10), and the threads in the two threaded holes are opposite in rotation direction.

5. The explosion-proof disconnecting switch box of claim 1, wherein, The power-off mechanism comprises two L-shaped grooves (18) arranged on the inner side walls of the box (1), an L-shaped plate (19) in sliding connection with the L-shaped grooves (18), a push plate (20) in rotational connection with the L-shaped grooves (18), the push plate (20) being matched with the L-shaped plate (19), a transmission cavity (21) arranged in the box (1), a rotating shaft (22) in rotational connection with the transmission cavity (21), a first winding roller (23) and a second winding roller (24) coaxially and fixedly connected to the rotating shaft (22), a first pull rope (25) fixedly connected to one end of the L-shaped plate (19), one end of the first pull rope (25) away from the L-shaped plate (19) slidingly penetrating through the box (1) and fixedly wound on the first winding roller (23), an electricity receiving cavity (26) arranged in the box (1), two electricity receiving plates (27) in sliding connection with the electricity receiving cavity (26), the two electricity receiving plates (27) being electrically connected with an electromagnetic valve arranged in the box (1), an electricity receiving prompt lamp (35) mounted on the upper end of the box (1), the electricity receiving prompt lamp (35) being electrically connected with the two electricity receiving plates (27), and a reset mechanism (28) arranged in the electricity receiving cavity (26) for resetting the electricity receiving plates (27), a second pull rope (29) fixedly connected to the side wall of the electricity receiving plate (27), one end of the second pull rope (29) away from the electricity receiving plate (27) slidingly penetrating through the box (1) and fixedly wound on the second winding roller (24).

6. The explosion-proof disconnecting switch box of claim 5, wherein, The reset mechanism (28) comprises two reset grooves (30) arranged on the inner side walls of the electricity receiving cavity (26), a limiting rod (31) fixedly connected in the reset grooves (30), a reset spring (32) and a sliding plate (33) sleeved on the limiting rod (31), the sliding plate (33) being in sliding connection with the reset grooves (30) and the limiting rod (31), the two ends of the reset spring (32) being fixedly connected with the reset grooves (30) and the sliding plate (33), respectively, and one end of the sliding plate (33) away from the reset grooves (30) being fixedly connected with the electricity receiving plate (27).

7. The explosion-proof disconnecting switch box of claim 1, wherein, The push plate (20) is in rotational connection with the inner side walls of the L-shaped grooves (18) through an automatic reset rotating shaft.

8. The explosion-proof disconnecting switch box of claim 1, wherein, The rotating shaft (22) is in rotational connection with the inner side walls of the transmission cavity (21) through a spiral spring.

9. The explosion-proof disconnecting switch box of claim 1, wherein, The opposite side walls of the two electricity receiving plates (27) are respectively provided with a mortise and a dowel hole, and the mortise and the dowel hole are matched.

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