Explosion-proof and intrinsic safety type electric cabinet

Abstract

The utility model provides an explosion-proof and intrinsic safety type electric cabinet, which relates to the technical field of mechanical equipment, and comprises an upper wiring box body and a lower control box body arranged on one side of the upper wiring box body, the lower control box body comprises a cover plate, a quick-open type rotating mechanism, a limiting mechanism and a box body with a window on one side, the cover plate is arranged on the windowing side of the box body in an openable and closable mode through a quick-opening type rotating mechanism and is in limiting fit with the box body through a limiting mechanism, the quick-opening type rotating mechanism comprises a rotating structure and a quick-opening structure, the rotating structure is rotationally arranged on the box body, the quick-opening structure is arranged on the cover plate, and the quick-opening structure is in sliding fit with the rotating structure. The device can effectively realize box opening and power failure, and underground safety production accidents are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical equipment, in particular to a flameproof and intrinsically safe electric control box. Background Art

[0002] Various standards for flameproof switchgear for explosive gas atmospheres require that, when equipped with an isolating switch, each interlock between the isolating switch and the switchgear cover or door ensure that the cover and door can only be opened when the isolating switch contacts are fully disconnected. Furthermore, the isolating switch cannot be closed while the door is open. This is a crucial measure to ensure the flameproof performance of the switchgear, on-site production safety, and the personal safety of operators. Currently, some quick-opening electric control boxes on the market rely on manual operation to lock the isolating switch to the door and between the two doors. However, these require multiple steps and are complex, impacting operational efficiency.

[0003] The existing utility model with authorization announcement number CN207219223U is an underground left-right translational explosion-proof quick-opening door electric control box, including an electric control box body, a left-side translational quick-opening door, a right-side translational quick-opening door, an isolating switch, an isolation switch locking mechanism and a left-right door interlocking mechanism. The left-side translational quick-opening door and the right-side translational quick-opening door are installed on the left and right sides of the front of the electric control box body. The left-right door interlocking mechanism is arranged on the front inner wall of the electric control box body. The left-right door interlocking mechanism is located between the left-side translational quick-opening door and the right-side translational quick-opening door; the isolation switch locking mechanism includes a switch handle, a switch handle shaft, a cam plate, a locking rod, a baffle and a fixing frame.

[0004] The applicant has discovered that the prior art has the technical problem of complex operation. Utility Model Content

[0005] The purpose of the utility model is to provide a flameproof and intrinsically safe electric control box to solve the technical problem of complex operation in the prior art.

[0006] In order to solve the above problems, the utility model relates to a flameproof and intrinsically safe electric control box adopts the following technical solutions:

[0007] The utility model provides an explosion-proof and intrinsically safe electric control box, comprising an upper wiring box body, a lower control box body arranged on one side of the upper wiring box body, the lower control box body comprising a cover plate, a quick-opening rotating mechanism, a limiting mechanism, and a box body with a window on one side, the cover plate being openable and closable on the window side of the box body through the quick-opening rotating mechanism, and being limited and matched with the box body through the limiting mechanism, the quick-opening rotating mechanism comprising a rotating structure and a quick-opening structure, the rotating structure being rotatably arranged on the box body, the quick-opening structure being installed on the cover plate, and the quick-opening structure being slidably matched with the rotating structure.

[0008] Preferably, it also includes a control component for controlling the opening and closing of the isolating switch in the box, the control component includes a handle part, a connecting sub-component, a connecting mother part, and a limit stop cap. The handle part rotates and slides with the box body, and the handle part can rotate or slide axially on the box body with the connecting axis with the box body as the rotation center line. The limit stop cap cover is arranged on the outside of the handle part, and an opening is provided on the limit stop cap through which the handle part can pass axially. One end of the handle part passes through the box body and is connected to the connecting sub-component. The connecting mother part is used to be arranged on the outer end of the rotating shaft of the isolating switch in the box body. The connecting sub-component and the connecting mother part are engaged and disengaged, and the rotation center line of the handle part is collinear with the rotation center line of the rotating shaft of the isolating switch.

[0009] Preferably, it also includes a water retaining cap installed on the top of the cover plate, a flange structure protruding outward from the box body is provided on the window side edge of the box body, and the water retaining cap extends inwardly of the edge of the box body to pass over the flange structure.

[0010] Preferably, the rotating structure includes a hinge pin, a hinge seat mounted on the box body, and a hinge shaft, and the hinge shaft is hinged to the hinge seat through the hinge pin so that the hinge shaft can rotate relative to the hinge seat.

[0011] Preferably, the quick-opening structure includes a guide seat and an eccentric cylindrical shaft installed on the door cover. The hinge shaft slides with the guide seat, and the eccentric cylindrical shaft rotates with the guide seat. The end of the eccentric cylindrical shaft is inserted into the guide seat and eccentrically cooperates with the hinge shaft located in the guide seat, so that the eccentric cylindrical shaft rotates and drives the hinge shaft to slide along the guide seat.

[0012] Preferably, the quick-opening structure includes a guide seat and a round shaft installed on the door cover. The hinge shaft and the guide seat are slidably matched, and the round shaft and the guide seat are rotatably matched. The end of the round shaft is inserted into the guide seat, and a gear is provided at the end of the round shaft. A rack arranged in the axial direction and matched with the gear is provided on the peripheral wall of the hinge shaft. The gear is engaged with the hinge shaft so that the round shaft rotates and drives the hinge shaft to slide along the guide seat.

[0013] Preferably, the quick-opening structure further includes a handle hinged to the eccentric cylindrical shaft.

[0014] Preferably, the limiting mechanism includes a barb provided on the cover and located in the sliding direction of the cover, and a card slot provided on the box and located in the sliding direction of the cover. The cover and the box slide relative to each other from the cover to the farthest point of the rotating structure and gradually approach the direction of the rotating structure, so that the barb can be matched and inserted into the card slot during the sliding process.

[0015] Preferably, the limiting mechanism also includes a support plate arranged on the cover plate, a limit stop group arranged on the support plate and spaced from the cover plate, and a limit stop cap arranged on the box body. The limit stop cap is arranged between the cover plate and the limit stop group. A slot is provided on the limit stop cap through which the limit stop group can pass. When the cover plate slides along the box body, the limit stop group of the support plate can correspond to the slot of the limit stop cap. After that, the cover plate rotates relative to the box body and the limit stop group separates the limit stop cap from the support plate through the slot.

[0016] Preferably, the box body is provided with a travel switch which enables the box body to abut against or separate from the cover plate when the cover plate is rotated to abut against the box body to seal the window.

[0017] The utility model provides a flameproof and intrinsically safe electric control box that is different from the prior art in that:

[0018] The beneficial effects of the utility model are as follows:

[0019] The utility model provides a flameproof and intrinsically safe electric control box. This device differs from existing technologies in that it comprises a cover plate, a quick-opening rotary mechanism, a limiting mechanism, and a box body with a window on one side. The cover plate is arranged on the window side of the box body and can be opened and closed by the quick-opening rotary mechanism. The limit mechanism cooperates with the box body to limit the position. The quick-opening rotary mechanism includes a rotating structure and a quick-opening structure. The rotating structure is rotatably arranged on the box body, and the quick-opening structure is mounted on the cover plate. The quick-opening structure and the rotating structure slide together. This device is simple to operate and quick and convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments:

[0021] Figure 1 This is an isometric view of a flameproof and intrinsically safe electric control box;

[0022] Figure 2 for Figure 1 A schematic diagram of the structure in another direction;

[0023] Figure 3 for Figure 2 Schematic diagram of the local structure;

[0024] Figure 4 This is the exploded view of the quick-opening structure;

[0025] Figure 5 It is a structural diagram of the box;

[0026] Figure 6 Schematic diagram of the structure of the door panel.

[0027] In the figure: 1. Cover plate; 2. Box body; 3. Handle; 6. Limit stop cap; 7. Water stop cap; 8. Flange structure; 9. Rotating structure; 10. Guide seat; 11. Eccentric cylindrical shaft; 12. Limit plate; 13. Limit stop group; 14. Support plate; 15. Barb; 16. Pin; 17. Articulated shaft; 18. Slide groove; 19. Barb; 20. Slot. DETAILED DESCRIPTION

[0028] In order to make the technical purpose, technical solution and beneficial effects of the present invention clearer, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0029] Example 1

[0030] The utility model provides a flameproof and intrinsically safe electric control box, as shown in the figure, comprising an upper wiring box body, a lower control box body arranged on one side of the upper wiring box body, the lower control box body comprising a cover plate 1, a quick-opening rotating mechanism, a limiting mechanism, and a box body 2 with a window on one side. The cover plate 1 is arranged on the window side of the box body 2 and can be opened and closed by the quick-opening rotating mechanism. The cover plate 1 can slide along the box body 2 and can rotate relative to the box body 2. The cover plate 1 is limited by the limiting mechanism and the box body 2, defining the position setting of the cover plate 1 and the box body 2 in cooperation with each other to close the window. The cover plate 1 is in the initial position and the farthest distance it slides along the box body 2 is the middle position. The limiting mechanism limits the sliding of the cover plate 1 from the initial position to the middle position (that is, the limiting mechanism limits the cover plate 1 to be able to rotate relative to the box body 2 only when it is in the middle position). The quick-opening rotating mechanism includes a rotating structure 9 and a quick-opening structure. The rotating structure 9 is rotatably arranged on the box body 2, and the quick-opening structure is installed on the cover plate 1. The quick-opening structure and the rotating structure 9 are slidably matched. The rotating structure 9 can drive the cover plate 1 to rotate relative to the box body 2, and the quick-opening structure can drive the cover plate 1 to slide relative to the box body 2.

[0031] The box body 2 is provided with a travel switch which can make the box body 2 press against it and compress its stroke segment when the cover plate 1 is rotated to abut against the box body 2. The travel switch is a prior art. The travel switch is coordinated with the circuit provided in the box body 2. When the stroke segment contracts, the circuit in the electric control box recovers. When the cover plate 1 rotates away from the box body 2 (i.e., the door cover is opened), the stroke segment of the travel switch is released and the electric control box is powered off.

[0032] The device also includes a control component for controlling the opening and closing of the isolating switch in the box body 2. The isolating switch is of existing technology and is installed in the box body 2. It has a rotatable long rod to control the opening and closing of the isolating switch. The control component includes a handle 3, a connecting sub-component, a connecting mother component, and a limit stop cap 6. A lock is provided on the cover plate 1 at a position corresponding to the position of the long rod. The connecting shaft of the handle 3 passes through the lock and is connected to the connecting sub-component. The handle 3 rotates and slides with the box body 2. The handle 3 can rotate or slide axially on the box body 2 with its connecting shaft with the box body 2 as the rotation center line. The connecting sub-component limits the handle 3 from detaching from the cover plate 1. The connecting mother part is used to be arranged on the outer end of the rotating shaft of the disconnector in the box body 2, the connecting sub-part and the connecting mother part are engaged and disengaged, the limit stop cap 6 is covered on the outside of the handle part 3, and the limit stop cap 6 is provided with an opening through which the handle part 3 can pass axially. During the rotation of the handle part 3 from the on state to the off state of the disconnector, the limit stop cap 6 blocks the handle part 3 from axially disengaging in its direction, and the connecting sub-part and the connecting mother part rotate synchronously. When the handle part 3 reaches the off position (off position) of the disconnector, the handle part 3 matches the opening on the limit stop cap 6, and the handle part 3 moves axially to pass through the opening to separate the connecting sub-part from the connecting mother part. The matching structure of the connecting sub-component and the connecting mother component only needs to be able to achieve the above-mentioned state. For the sake of easy understanding, it is stated first: the connecting sub-component is a columnar connecting component, and a groove is concave inward at one end thereof facing the connecting mother component. The connecting mother component is set to a shape matching the groove toward the end of the connecting sub-component, so that the connecting mother component can be matched and inserted into the groove for connection. It needs to be understood that the shape of the groove needs to be able to circumferentially lock the position of the connecting mother component to prevent the two from rotating relative to each other, that is, the groove can be set to a prism or an irregular shape, but not a cylindrical shape, and the rotation center line of the handle component 3 is collinear with the rotation center line of the rotation axis of the disconnector.

[0033] Since the quick-opening structure does not have a good sealing performance for the door cover due to the lack of a bolt-fastening structure, water is easily introduced. The device further includes a water retaining cap 7 mounted on the top of the cover plate 1. A flange structure 8 protruding outward from the box body 2 is provided on the window side edge of the box body 2. The water retaining cap 7 extends toward the edge of the box body 2 and passes over the flange structure 8 so that the water retaining cap 7 blocks the gap between the box body 2 and the door cover.

[0034] The rotating structure 9 includes a hinge pin, a hinge seat mounted on the housing 2, and a hinge shaft 17. The hinge shaft 17 is hinged to the hinge seat via the hinge pin so that the hinge shaft 17 can rotate relative to the hinge seat. The quick-opening structure includes a guide seat 10 mounted on the door cover and an eccentric cylindrical shaft 11. The hinge shaft 17 penetrates into the guide seat 10 and slides with the guide seat 10. A seal is provided on the peripheral wall of the hinge shaft 17 located inside the guide seat 10. The end of the eccentric cylindrical shaft 11 is inserted into the guide seat 10. The eccentric cylindrical shaft 11 rotates with the guide seat 10 so that the eccentric cylindrical shaft 11 can rotate relative to the guide seat 10. A seal is also provided on the peripheral wall of the eccentric cylindrical shaft 11 located inside the guide seat 10. The guide seat 10 is filled with lubricating oil. The seals at the two ports are provided to prevent the lubricating oil from flowing out. The eccentric cylindrical shaft 11 is eccentrically matched with the hinge shaft 17 located in the guide seat 10, so that the eccentric cylindrical shaft 11 rotates and drives the hinge shaft 17 to slide along the guide seat 10. The eccentric cylindrical shaft 11 is hinged with a handle. Specifically, the eccentric cylindrical shaft 11 includes a straight rod and a pin 16 eccentrically arranged at the end of the straight rod. The peripheral wall of the hinge shaft 17 is inwardly recessed with a slide groove 18 perpendicular to its sliding direction. The pin 16 of the eccentric cylindrical shaft 11 is matched and inserted into the slide groove 18 of the hinge shaft 17. The eccentric cylindrical shaft 11 rotates to cause the pin 16 to push the groove wall of the slide groove 18 to push the hinge shaft 17 to slide along the guide seat 10.

[0035] The limiting mechanism includes a barb 15 provided on the cover plate 1 and located in the sliding direction of the cover plate 1, and a slot 20 provided on the box body 2 and located in the sliding direction of the cover plate 1. During the relative sliding of the cover plate 1 and the box body 2 from the maximum stroke of the quick-open structure to the rotating structure 9, the barb 15 can be matched and inserted into the slot 20. Furthermore, two sets of barbs 15 and slots 20 are provided, with the two barbs 15 respectively provided at the ends of the cover plate 1 close to and away from the quick-open rotating mechanism, and the two slots 20 respectively provided at the positions of the corresponding two barbs 15 on the flange structure 8, so that during the relative sliding of the cover plate 1 and the box body 2 from the cover plate 1 to the farthest end of the rotating structure 9 to the rotating structure 9, the two barbs 15 can be matched and inserted into their corresponding slots 20.

[0036] The limiting mechanism also includes a support plate 14 arranged on the cover 1, a limit stop group 13 arranged on the support plate 14 and spaced from the cover 1, and a limit plate 12 arranged on the box body 2. The limit plate 12 is provided with a slot through which the limit stop group 13 can pass. The cover 1 is buckled onto the box body 2, and the limit plate 12 is located between the cover 1 and the limit stop group 13. During the sliding process of the cover 1 along the box body 2, the limit stop group 13 of the support plate 14 can correspond to the slot of the limit plate 12. The cover 1 rotates relative to the box body 2, and the limit stop group 13 separates the limit plate 12 from the support plate 14 through the slot, and the limit stop group 13 protrudes from the support plate 14.

[0037] Example 2

[0038] The difference between Example 2 and Example 1 is that the quick-opening structure includes a guide seat 10 and a round shaft installed on the door cover, the hinge shaft 17 is slidingly matched with the guide seat 10, the round shaft is rotatably matched with the guide seat 10, the end of the round shaft is inserted into the guide seat 10, and a gear is provided at the end of the round shaft. A rack is provided on the peripheral wall of the hinge shaft 17 along the axial direction to match the gear, and the gear is engaged with the hinge shaft 17 so that the round shaft rotates and drives the hinge shaft 17 to slide along the guide seat 10.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate and not to limit the technical solutions of the present invention. Any equivalent replacement of the present invention and any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A flameproof and intrinsically safe electric control box, comprising an upper wiring box and a lower control box arranged on one side of the upper wiring box, characterized in that: The lower control box includes a cover, a quick-opening rotating mechanism, a limiting mechanism, and a box with a window on one side. The cover can be opened and closed on the window side of the box through the quick-opening rotating mechanism, and is limited by the limiting mechanism and cooperates with the box. The quick-opening rotating mechanism includes a rotating structure and a quick-opening structure. The rotating structure is rotatably arranged on the box, and the quick-opening structure is installed on the cover. The quick-opening structure and the rotating structure are slidably cooperated.

2. The flameproof and intrinsically safe electric control box according to claim 1, characterized in that: The control assembly further includes a handle, a connecting member, a connecting mother member, and a limit stop cap. The handle rotates and slides with the box body. The handle can rotate or slide axially on the box body with its connecting axis with the box body as the rotation center line. The limit stop cap is provided on the outside of the handle, and an opening is provided on the limit stop cap through which the handle can pass axially. One end of the handle passes through the box body and is connected to the connecting member. The connecting mother member is used to be provided on the outer end of the rotating shaft of the isolating switch in the box body. The connecting member and the connecting mother member are engaged and disengaged, and the rotation center line of the handle is collinear with the rotation center line of the rotating shaft of the isolating switch.

3. The flameproof and intrinsically safe electric control box according to claim 2, characterized in that: It also includes a water retaining cap installed on the top of the cover plate. A flange structure protruding outward from the box body is provided on the window side edge of the box body. The water retaining cap extends inwardly toward the edge of the box body to pass over the flange structure.

4. The flameproof and intrinsically safe electric control box according to claim 3, characterized in that: The rotating structure comprises a hinge pin, a hinge seat arranged on the box body, and a hinge shaft. The hinge shaft is hinged to the hinge seat through the hinge pin so that the hinge shaft can rotate relative to the hinge seat.

5. The flameproof and intrinsically safe electric control box according to claim 4, characterized in that: The quick-opening structure includes a guide seat and an eccentric cylindrical shaft installed on the door cover. The hinge shaft slides with the guide seat, and the eccentric cylindrical shaft rotates with the guide seat. The end of the eccentric cylindrical shaft is inserted into the guide seat and eccentrically cooperates with the hinge shaft located in the guide seat, so that the eccentric cylindrical shaft rotates and drives the hinge shaft to slide along the guide seat.

6. The flameproof and intrinsically safe electric control box according to claim 4, characterized in that: The quick-opening structure includes a guide seat and a round shaft installed on the door cover. The hinged shaft and the guide seat are slidably matched, and the round shaft and the guide seat are rotatably matched. The end of the round shaft is inserted into the guide seat, and a gear is provided at the end of the round shaft. A rack is provided on the peripheral wall of the hinged shaft along the axial direction to match the gear. The gear is engaged with the hinged shaft so that the round shaft rotates and drives the hinged shaft to slide along the guide seat.

7. The flameproof and intrinsically safe electric control box according to claim 5, characterized in that: The quick-opening structure also includes a handle hinged to the eccentric cylindrical shaft.

8. The flameproof and intrinsically safe electric control box according to claim 3, characterized in that: The limiting mechanism includes a barb arranged on the cover and located in the sliding direction of the cover, and a slot arranged on the box and located in the sliding direction of the cover. The cover and the box slide relative to each other from the cover to the farthest point of the rotating structure to gradually approach the direction of the rotating structure, so that the barb can be matched and inserted into the slot during the sliding process.

9. The flameproof and intrinsically safe electric control box according to claim 8, characterized in that: The limiting mechanism also includes a support plate arranged on the cover plate, a limit stop group arranged on the support plate and spaced from the cover plate, and a limit plate arranged on the box body. The limit plate is arranged between the cover plate and the limit stop group. A slot is provided on the limit plate through which the limit stop group can pass. When the cover plate slides along the box body, the limit stop group of the support plate can correspond to the slot of the limit plate. After that, the cover plate rotates relative to the box body and the limit stop group separates the limit plate from the support plate through the slot.

10. The flameproof and intrinsically safe electric control box according to claim 1, characterized in that: The box body is provided with a travel switch which can squeeze and contract the box body when the cover plate rotates to abut against the box body.

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