CN110213917B - Interlocking device of linkage self-locking explosion-proof control cabinet - Google Patents
Interlocking device of linkage self-locking explosion-proof control cabinet Download PDFInfo
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- CN110213917B CN110213917B CN201910509012.XA CN201910509012A CN110213917B CN 110213917 B CN110213917 B CN 110213917B CN 201910509012 A CN201910509012 A CN 201910509012A CN 110213917 B CN110213917 B CN 110213917B
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- rod
- locking
- reset
- fixedly connected
- cabinet
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
- H01H3/16—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. for a door switch, a limit switch, a floor-levelling switch of a lift
- H01H3/161—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. for a door switch, a limit switch, a floor-levelling switch of a lift for actuation by moving a closing member, e.g. door, cover or lid
- H01H3/163—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. for a door switch, a limit switch, a floor-levelling switch of a lift for actuation by moving a closing member, e.g. door, cover or lid associated with locking or manipulating means of the closing member
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0217—Mechanical details of casings
- H05K5/0221—Locks; Latches
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/06—Hermetically-sealed casings
- H05K5/069—Other details of the casing, e.g. wall structure, passage for a connector, a cable, a shaft
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Computer Security & Cryptography (AREA)
- Casings For Electric Apparatus (AREA)
Abstract
The invention discloses an interlocking device of a linkage self-locking explosion-proof control cabinet, which comprises a cabinet body, wherein one side of the cabinet body is rotatably connected with a cabinet door, the bottom of the inner side of the cabinet door is provided with a vertically arranged mounting rack, a main power switch is arranged on the mounting rack, two bearing blocks are symmetrically and fixedly connected on the inner wall of the cabinet body, a rotating rod is connected between the two bearing blocks in a rotating fit manner, the outer side of the rotating rod is sleeved with a rotating disk, one side of the rotating disk is provided with a T-shaped groove, a switch poking rod of the main power switch extends into the T-shaped groove, the bottom of the inner side of the cabinet body is connected with a sliding rod in a sliding. The invention has the advantages that: the linkage self-locking explosion-proof control cabinet is suitable for being used in a linkage self-locking explosion-proof control cabinet, and can control the opening of a contact switch, so that the linkage self-locking explosion-proof control cabinet can open a cabinet door only after the internal power is cut off.
Description
Technical Field
The invention relates to the technical field of electrical explosion prevention, in particular to an interlocking device of a linkage self-locking explosion-proof control cabinet.
Background
With the rapid development of industries such as kerosene chemical industry, metal smelting, chemical pharmacy and the like, the explosion-proof control cabinet is more and more widely used in system control. How to accurately utilize an explosion-proof control cabinet in an explosive gas injury occasion, as the electrical equipment is deployed at the time of affairs, electric sparks are generated unleasedly or a hot appearance is formed, and once the electrical equipment meets with the explosive gas confuser on the spot, the electrical equipment can cause the generation of explosion disorder, thereby directly endangering the property and the calmness of the life of a user. The explosion-proof control cabinet has the advantages that the power supply in the cabinet can be automatically cut off when the cabinet door is opened, the safety is high, the power supply can be cut off instantly in the explosion-proof control cabinet, the external combustible and explosive gas can easily enter the cabinet in the instant when the cabinet door of the control cabinet is opened, and the potential safety hazard is still large. The linkage self-locking anti-explosion control cabinet is developed by the applicant, and the cabinet door can be locked and cannot be opened under the condition that the linkage self-locking anti-explosion control cabinet is electrified. This application mainly used protects the interlock in this explosion-proof switch board of linkage auto-lock, in addition, this application can also solve the problem that the explosion-proof cabinet structure of the outage is complicated among the prior art that opens the door alone.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides an interlocking device for a linkage self-locking explosion-proof control cabinet.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides an interlock of explosion-proof switch board of linkage auto-lock, includes the cabinet body, and cabinet body one side is rotated and is connected the cabinet door, and the inboard bottom of cabinet door is equipped with the mounting bracket of vertical setting, is equipped with total switch on the mounting bracket, its characterized in that: the cabinet is characterized in that the cabinet is provided with two bearing seats which are fixedly connected symmetrically on the inner wall of the cabinet body, the two bearing seats are connected with a rotating rod in a rotating fit manner, the rotating disk is sleeved outside the rotating rod, a T-shaped groove is formed in one side of the rotating disk, a switch poking rod of a main power switch stretches into the T-shaped groove, the bottom of the inner side of the cabinet body is connected with a sliding rod in a sliding fit manner, a rack is fixedly connected to the middle of the upper side of the sliding rod, a toothed ring is sleeved outside the rotating rod, the toothed ring.
Preferably, one side in the cabinet body is fixedly connected with a guide plate, one side of the guide plate is provided with a guide hole, the sliding rod penetrates through the guide hole, and the sliding rod can slide in the guide hole in a reciprocating mode and is used for guiding the sliding rod.
Preferably, the sliding rod is fixedly sleeved with a first blocking ring, and the first blocking ring is arranged between the guide plate and the rack.
Preferably, resetting means includes the post that resets, and the post fixed connection that resets is internal at the cabinet, and the post that resets is equipped with the reset hole towards one side of cabinet door, and second reset spring is equipped with to the bottom in the reset hole, the slide bar is pegged graft and is in the reset hole is downthehole, the slide bar can the downthehole reciprocal slip that resets.
Preferably, one end of the sliding rod extending into the return hole is fixedly connected with a central rod, and the central rod is inserted into the center of the second return spring.
Preferably, a second stop ring is fixedly sleeved on the sliding rod and arranged between the reset column and the rack.
The invention has the advantages that: the linkage self-locking explosion-proof control cabinet is suitable for being used in a linkage self-locking explosion-proof control cabinet, can control the opening of a contact switch, and enables the linkage self-locking explosion-proof control cabinet to realize that a cabinet door can be opened only after the internal power is cut off.
Drawings
FIG. 1 is a schematic diagram of the basic structure of the present invention;
FIG. 2 is an enlarged view of section B of FIG. 1 with the cabinet door open;
FIG. 3 is an enlarged view of section B of FIG. 1 with the cabinet door closed;
FIG. 4 is a schematic diagram of the basic structure of the linkage self-locking explosion-proof control cabinet
FIG. 5 is a schematic view of the connection of the turntable to the mains power switch when the cabinet door of FIG. 4 is open;
FIG. 6 is a schematic view of the connection between the turntable and the main power switch when the cabinet door of FIG. 4 is closed;
FIG. 7 is an enlarged view of portion A of FIG. 4;
fig. 8 is a structural view of the locking device when the cabinet door in fig. 4 is closed.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in fig. 1-3, the interlocking device of the linked self-locking explosion-proof control cabinet provided by the invention comprises a cabinet body 1, one side of the cabinet body 1 is rotatably connected with a cabinet door 2, the bottom of the inner side of the cabinet door 2 is provided with a vertically arranged mounting frame 3, the mounting frame 3 is provided with a main power switch 31, the inner wall of the cabinet body 1 is symmetrically and fixedly connected with bearing seats 71, the two bearing seats 71 are oppositely arranged, the two bearing seats 71 are rotatably matched and connected with a rotating rod 7 through bearings, the outer side of the rotating rod 7 is sleeved with a rotating disc 72, one side of the rotating disc 72 is provided with a T-shaped groove 721, a switch poke, the sliding rod 6 is connected to the bottom of the inner side of the cabinet body 1 in a sliding fit mode, the guide plate 4 is fixedly connected to one side of the inner side of the cabinet body 1, a guide hole is formed in one side of the guide plate 4, the sliding rod 6 penetrates through the guide hole, and the sliding rod 6 can slide in the guide hole in a reciprocating mode and is used for guiding the sliding rod 6. The slide lever 6 is prevented from being displaced when sliding. The middle part of the upper side of the sliding rod 6 is fixedly connected with a rack 61, a toothed ring 76 is sleeved outside the rotating rod 7, and the toothed ring 76 is meshed with the rack 61. A resetting device 5 is arranged at one end of the sliding rod 6 far away from the cabinet door 2. Reset device 5 includes reset post 51, and reset post 51 fixed connection is inboard at the cabinet body 1, and reset post 51 is equipped with reset hole 511 towards one side of cabinet door 2, and second reset spring 52 is equipped with to the bottom in reset hole 511, and slide bar 6 is pegged graft in reset hole 511, and slide bar 6 can be in reset hole 511 reciprocal slip. One end of the slide rod 6 extending into the return hole 511 is fixedly connected to the center rod 64, and the center rod 64 is inserted into the center of the second return spring 52. The sliding rod 6 is fixedly sleeved with a second retaining ring 63, and the second retaining ring 63 is arranged between the reset column 51 and the rack 61.
The interlocking device provided by the invention is used in a linkage self-locking explosion-proof control cabinet, as shown in fig. 4-8, the linkage self-locking explosion-proof control cabinet also comprises a locking device matched with the interlocking device provided by the invention for use, the locking device comprises a first vertical plate 8 and a second vertical plate 8a which are fixedly connected with the bottom of the inner side of a cabinet body 1, one side of each of the first vertical plate 8 and the second vertical plate 8a is provided with a round hole, the two round holes are coaxially arranged, a push rod 81 is connected in the two round holes in a sliding manner, one end of the push rod 81 is hinged and fixed with a locking piece for locking a cabinet door, the locking piece comprises a rotating column 12, the rotating column 12 is rotatably connected in a rotating hole at the bottom of the inner side of the cabinet body 1, a torsion spring for controlling the rotating column 12 to reset is arranged in the rotating hole, the installation mode between the torsion spring and the rotating, the cabinet door 2 is fixedly connected with a locking plate 16, the locking plate 16 is provided with a circular arc locking hole 161, a locking rod 14 is arranged corresponding to the locking hole 161, the locking rod 14 can be inserted into the locking hole 161 along with the rotation of the rotating column 12 and used for locking the cabinet door 2, one side of the rotating column 12 is also fixedly connected with a first connecting rod 17, the first connecting rod 17 is hinged and fixed with a second connecting rod 84, and the second connecting rod 84 is hinged and fixed with a push rod 81. The dead lever 13 one side is equipped with spacing groove 131, at the vertical gag lever post 15 of setting of 1 inboard bottom fixed connection of the cabinet body, gag lever post 15 sets up with spacing groove 131 relatively for carry on spacingly to the turned angle of post 12.
At push rod 81 other end fixed connection iron plate 9, at 8 one side fixed connection electromagnetism ring 10 of first riser, electromagnetism ring 10 sets up towards iron plate 9, can produce suction to iron plate 9 after electromagnetism ring 10 circular telegram for drive push rod 81 slides in two round holes, cabinet body 1 in one side fixed connection locating piece 91, locating piece 91 one side is equipped with the locating hole, iron plate 9 is equipped with locating lever 92 towards locating piece 91 one side, locating lever 92 corresponds coaxial setting with the locating hole, locating lever 92 can be in locating hole sliding fit.
A fixed reset ring 82 is sleeved on the push rod 81, the reset ring 82 is arranged between the first vertical plate 8 and the second vertical plate 8a, a first reset spring 83 is sleeved on the push rod 81, the first reset spring 83 is arranged between the reset ring 82 and the second vertical plate 8a, and the push rod 81 is reset after the electromagnet ring 10 is powered off.
The locking device and the interlocking device are related in such a way that: the main power switch 31 is connected with the electromagnet ring 10 through a power line control, a contact switch 75 is further mounted on the power line, the contact switch 75 is fixedly connected to the bottom plate of the cabinet body 1, a contact member is fixedly connected to one side of the turntable 72 and comprises a cross rod 73 fixedly connected to one side of the turntable 72, a contact rod 74 is fixedly connected to one side of the cross rod 73, the contact rod 74 and the contact switch 75 are correspondingly arranged, and the contact rod 74 can rotate along with the turntable 72 to be in contact with or be far away from the contact switch 75. A spherical ball 741 is fixedly connected to an end of the contact lever 74 facing the contact switch 75, and the contact lever 74 contacts the contact switch 75 through the spherical ball 741. The contact piece is rotated by the turntable 72 to control the round ball 741 to contact or separate from the contact switch 75, so as to control the opening or closing of the contact switch 75.
The working principle of the linkage self-locking explosion-proof control cabinet using the interlocking device provided by the invention is as follows: when the cabinet door 2 is opened, the sliding rod 6 extends out of the cabinet body 1, the main power switch 31 is in an off state, and the contact switch is also in an off state. When the cabinet door is closed, the cabinet door 2 generates inward thrust to the sliding rod 6, the sliding rod 6 is pushed to slide towards the cabinet body 1 along the guide hole of the guide plate 4, the sliding rod 6 compresses the spring, and when the second stop ring 63 contacts with the reset column 51, the cabinet door 2 is just in a closed state. In the moving process of the sliding rod 6, the rack 61 on the upper side of the sliding rod 6 drives the gear ring 76 to rotate, so as to drive the rotating rod 7 to rotate, the rotating disk 72 also rotates along with the rotating rod 7, and in the rotating process of the rotating disk 72, on one hand, the switch poke rod of the main power switch 31 can be poked through the T-shaped groove 721, so as to close the main power switch 31; on the other hand, can drive horizontal pole 73 and rotate, thereby make ball 741 contact with contact switch 75, thereby through contact switch control electromagnetism ring 10 circular telegram, the circular telegram of electromagnetism ring 10 circular telegram back adsorbs iron plate 9 and removes to electromagnetism ring 10 direction, iron plate 9 is after the elasticity of first spring 83 is overcome at the removal in-process, produce thrust to push rod 81, promote first connecting rod 17 through push rod 81, thereby it rotates to drive rotation post 12, at rotation post 12 rotation in-process, in the check lock pole 14 can insert the locking hole 161, lock cabinet door 2, under the condition of continuous power supply in the cabinet body 1, the cabinet door will unable the opening.
When the cabinet door 2 needs to be opened, the circuit of the explosion-proof control cabinet is cut off in the control room, the electromagnet ring 10 loses magnetic force, the push rod 81 resets under the action of the elastic force of the first spring 83, the first connecting rod 17 loses the thrust of the push rod 81, the rotating column 12 rotates under the action of the torsion spring, and the locking rod 14 moves out of the locking hole 161 in the rotating process of the rotating column 12. If the locking device of the present invention fails, when the cabinet door 2 is opened accidentally, the sliding rod 6 moves outward under the elastic force of the second spring 52, and in the moving process, the rack 61 on the upper side of the sliding rod 6 drives the toothed ring 76 to rotate, and the switch toggle rod of the main power switch 31 is toggled through the T-shaped slot 721, so that the main power switch 31 is disconnected, and the present invention has the advantages of double protection and high safety.
Claims (6)
1. The utility model provides an interlock of explosion-proof switch board of linkage auto-lock, includes the cabinet body (1), and cabinet body (1) one side is rotated and is connected cabinet door (2), and cabinet door (2) inboard bottom is equipped with mounting bracket (3) of vertical setting, is equipped with total power switch (31) on mounting bracket (3), its characterized in that: the cabinet is characterized in that two bearing seats (71) are symmetrically and fixedly connected to the inner wall of the cabinet body (1), a rotating rod (7) is connected between the two bearing seats (71) in a rotating fit mode, a rotating disc (72) is sleeved on the outer side of the rotating rod (7), a T-shaped groove (721) is formed in one side of the rotating disc (72), a switch poking rod of the main power switch (31) extends into the T-shaped groove (721), a sliding rod (6) is connected to the bottom of the inner side of the cabinet body (1) in a sliding fit mode, a rack (61) is fixedly connected to the middle of the upper side of the sliding rod (6), a toothed ring (76) is sleeved on the outer side of the rotating rod (7), the toothed ring (76) is meshed with the rack (61);
the cabinet door locking device comprises a first vertical plate (8) and a second vertical plate (8 a) which are fixedly connected to the bottom of the inner side of the cabinet body 1, round holes are formed in one sides of the first vertical plate (8) and the second vertical plate (8 a), the two round holes are coaxially arranged, a push rod (81) is slidably connected in the two round holes, one end of the push rod (81) is hinged and fixedly provided with a locking piece for locking the cabinet door, the locking piece comprises a rotating column (12), the rotating column (12) is rotatably connected in the rotating hole in the bottom of the inner side of the cabinet body (1), a torsion spring for controlling the rotating column (12) to reset is arranged in the rotating hole, a fixing rod (13) is fixedly connected to one side of the rotating column (12), a circular arc-shaped locking rod (14) is fixedly connected to one side of the fixing rod (13), a locking plate (16) is fixedly connected to the cabinet door (2), a circular arc-shaped locking, the locking rod (14) can be inserted into the locking hole (161) along with the rotation of the rotating column (12), one side of the rotating column (12) is also fixedly connected with a first connecting rod (17), the first connecting rod (17) is hinged and fixed with a second connecting rod (84), the second connecting rod (84) is hinged and fixed with the push rod (81), one side of the fixed rod (13) is provided with a limiting groove (131), the bottom of the inner side of the cabinet body (1) is fixedly connected with a vertically arranged limiting rod (15), and the limiting rod (15) and the limiting groove (131) are arranged oppositely;
an iron plate (9) is fixedly connected to the other end of the push rod (81), an electromagnet ring (10) is fixedly connected to one side of the first vertical plate (8), the electromagnet ring (10) is arranged towards the iron plate (9), the electromagnet ring (10) can generate suction force to the iron plate (9) after being electrified and is used for driving the push rod (81) to slide in the two circular holes, a positioning block (91) is fixedly connected to one side in the cabinet body (1), a positioning hole is formed in one side of the positioning block (91), a positioning rod (92) is arranged on one side, facing the positioning block (91), of the iron plate (9), the positioning rod (92) and the positioning hole are correspondingly and coaxially arranged, and the positioning rod;
cup joint fixed reset ring (82) on push rod (81), reset ring (82) set up between first riser (8) and second riser (8 a), cup joint first reset spring (83) on push rod (81), and first reset spring (83) set up between reset ring (82) and second riser (8 a).
2. The interlocking device of the linked self-locking explosion-proof control cabinet according to claim 1, characterized in that: one side fixed connection deflector (4) in the cabinet body (1), deflector (4) one side is equipped with the guiding hole, slide bar (6) are followed pass in the guiding hole, slide bar (6) can reciprocating sliding in the guiding hole for lead slide bar (6).
3. The interlocking device of the linked self-locking explosion-proof control cabinet according to claim 2, characterized in that: a first blocking ring (62) is fixedly sleeved on the sliding rod (6), and the first blocking ring (62) is arranged between the guide plate (4) and the rack (61).
4. The interlocking device of the linked self-locking explosion-proof control cabinet according to claim 1, characterized in that: resetting means (5) are including restoring post (51), and restoring post (51) fixed connection is inboard at cabinet body (1), and one side that restoring post (51) are towards cabinet door (2) is equipped with reset hole (511), and second reset spring (52) are equipped with to the bottom in reset hole (511), slide bar (6) are pegged graft in reset hole (511), and slide bar (6) can reciprocating sliding in reset hole (511).
5. The interlocking device of the linkage self-locking explosion-proof control cabinet according to claim 4, characterized in that: one end of the sliding rod (6) extending into the reset hole (511) is fixedly connected with a central rod (64), and the central rod (64) is inserted into the center of the second reset spring (52).
6. The interlocking device of the linkage self-locking explosion-proof control cabinet according to claim 4, characterized in that: and a second retaining ring (63) is fixedly sleeved on the sliding rod (6), and the second retaining ring (63) is arranged between the reset column (51) and the rack (61).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910509012.XA CN110213917B (en) | 2019-06-13 | 2019-06-13 | Interlocking device of linkage self-locking explosion-proof control cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910509012.XA CN110213917B (en) | 2019-06-13 | 2019-06-13 | Interlocking device of linkage self-locking explosion-proof control cabinet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110213917A CN110213917A (en) | 2019-09-06 |
| CN110213917B true CN110213917B (en) | 2020-12-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910509012.XA Active CN110213917B (en) | 2019-06-13 | 2019-06-13 | Interlocking device of linkage self-locking explosion-proof control cabinet |
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| Country | Link |
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| CN (1) | CN110213917B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114126306B (en) * | 2021-10-26 | 2023-10-27 | 深圳市紫光照明技术股份有限公司 | Explosion-proof electrical equipment box |
| CN115692058B (en) * | 2022-11-09 | 2023-10-27 | 太原达锐科技有限公司 | Explosion-proof mechanical interlocking control box |
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| CN203966880U (en) * | 2014-04-02 | 2014-11-26 | 安徽埃菲科电气设备制造有限公司 | A kind of explosion-proof control mechanical interlock mechanism |
| CN204464835U (en) * | 2015-02-17 | 2015-07-08 | 四川省南充晶塔变压器有限公司 | A kind of cabinet door interlocking device of switch cabinet |
| CN108648935A (en) * | 2018-05-31 | 2018-10-12 | 二工防爆科技股份有限公司 | A kind of safe explosion proof control case |
| CN108695079A (en) * | 2018-05-31 | 2018-10-23 | 二工防爆科技股份有限公司 | A kind of explosion proof control case that can be automatically cut off the power |
| CN208623141U (en) * | 2018-08-02 | 2019-03-19 | 珠海鼎冠电气有限公司 | Electrical cabinet couplet on the door lock construction |
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2019
- 2019-06-13 CN CN201910509012.XA patent/CN110213917B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203966880U (en) * | 2014-04-02 | 2014-11-26 | 安徽埃菲科电气设备制造有限公司 | A kind of explosion-proof control mechanical interlock mechanism |
| CN204464835U (en) * | 2015-02-17 | 2015-07-08 | 四川省南充晶塔变压器有限公司 | A kind of cabinet door interlocking device of switch cabinet |
| CN108648935A (en) * | 2018-05-31 | 2018-10-12 | 二工防爆科技股份有限公司 | A kind of safe explosion proof control case |
| CN108695079A (en) * | 2018-05-31 | 2018-10-23 | 二工防爆科技股份有限公司 | A kind of explosion proof control case that can be automatically cut off the power |
| CN208623141U (en) * | 2018-08-02 | 2019-03-19 | 珠海鼎冠电气有限公司 | Electrical cabinet couplet on the door lock construction |
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| CN110213917A (en) | 2019-09-06 |
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