CN111641122A - Safety protection switch board - Google Patents
Safety protection switch board Download PDFInfo
- Publication number
- CN111641122A CN111641122A CN202010321056.2A CN202010321056A CN111641122A CN 111641122 A CN111641122 A CN 111641122A CN 202010321056 A CN202010321056 A CN 202010321056A CN 111641122 A CN111641122 A CN 111641122A
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- China
- Prior art keywords
- cabinet body
- cabinet
- wall
- side wall
- safety protection
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/28—Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/56—Cooling; Ventilation
- H02B1/565—Cooling; Ventilation for cabinets
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
- Casings For Electric Apparatus (AREA)
Abstract
The invention discloses a safety protection power distribution cabinet, which comprises: the cabinet body, the cabinet door and the door lock; the invention relates to the technical field of power distribution cabinets, in particular to a cabinet door which is movably arranged on the front wall edge of a cabinet body, a door lock is fixedly arranged on the rear side wall of the cabinet door, and one end of the door lock is movably embedded in the cabinet door and is positioned on a central line; the first baffle and the second baffle are controlled to be linked to lift through the driving of an electric telescopic rod in the heat dissipation structure, so that the flowing heat dissipation of air inlet and outlet is realized, and the air inlet and outlet can be closed to form sealing so as to avoid oxygen after fire catching and avoid the fire from increasing; temperature sensor experiences temperature rise certain degree after catching a fire through the structure of putting out a fire, and control solenoid opens and puts out a fire with the help of dry powder fire extinguisher, with bear and collect structure and heat radiation structure and can cooperate the implementation, play and seal, put out a fire and the later stage is collected clear effect.
Description
Technical Field
The invention relates to the technical field of power distribution cabinets, in particular to a safety protection power distribution cabinet.
Background
The power distribution cabinet (box) is a final-stage device of a power distribution system and is a general name of a motor control center; the power distribution cabinet is used in the occasions with dispersed loads and less loops; the motor control center is used for the occasions with concentrated loads and more loops, and distributes the electric energy of a certain circuit of the upper-level distribution equipment to the nearby loads, and the equipment provides protection, monitoring and control for the loads;
however, the existing power distribution cabinet is generally characterized in that a heat dissipation opening is formed in a cabinet door or a cabinet body, the heat is more due to the fact that the inside of the power distribution cabinet is high-voltage, the heat dissipation effect is poor, hot combustion and electric combustion are easily caused, meanwhile, due to the fact that the inside of the power distribution cabinet is an electric appliance, after fire is caught, the power distribution cabinet cannot effectively and quickly extinguish fire, potential safety hazards exist, and therefore, the safety protection power distribution cabinet is designed aiming at the problems.
Disclosure of Invention
The invention aims to provide a safety protection power distribution cabinet to solve the problems of poor heat dissipation and rapid fire extinguishing.
In order to achieve the purpose, the invention provides the following technical scheme: a safety protection switch board, includes: the cabinet body, the cabinet door and the door lock; the cabinet body is of a box body structure without a front wall, the left side wall and the right side wall of the cabinet body are respectively provided with a pair of clamping grooves with the same structure, the clamping grooves are respectively positioned at the upper side and the lower side of a central line and are mutually symmetrical, the upper wall of the cabinet body is provided with a matching groove and is positioned on the central line close to the rear end, the central part of the rear side wall of the cabinet body is provided with a heat dissipation port, the cabinet door is movably arranged on the front wall edge of the cabinet body, the door lock is fixedly arranged on the rear side wall of the cabinet door, one end of the door lock is movably embedded in the cabinet door and is positioned;
the heat dissipation structure is fixedly arranged on the upper wall in the cabinet body, the bearing collection structure is detachably arranged in the cabinet body and is positioned below the heat dissipation structure, and the fire extinguishing structure is fixedly arranged on the right side wall of the cabinet body;
the heat radiation structure includes: the device comprises a fan, a mounting rack, an electric telescopic rod, a connecting plate, a pair of connecting rods with the same structure, a first baffle, a pair of limiting plates with the same structure, a second baffle and a transmission rod;
the fan is fixedly embedded in the upper wall of the cabinet body and is positioned at the central part in the fitting groove, the mounting frame is fixedly welded on the upper wall in the cabinet body and is positioned on a central line close to the rear end and is positioned under the fan, the electric telescopic rod is fixedly arranged on the upper wall in the mounting frame and is positioned at the central part, the connecting rod is fixedly welded on the driving end of the electric telescopic rod and is positioned in the mounting frame, one end of each connecting rod is fixedly welded on two ends of the upper wall of the connecting rod, the other end of each connecting rod movably penetrates through the upper wall of the cabinet body and is positioned at the left side and the right side in the fitting groove, the first baffle is fixedly welded on the other end of each connecting rod and is movably embedded in the fitting groove, the pair of limiting plates are fixedly welded on the rear side wall in the cabinet body and are respectively positioned at the left side and the right side of the heat dissipation opening and are mutually symmetrical, and, one end of the transmission rod is movably arranged on the upper wall of the second baffle plate and is positioned at the central part, and the other end of the transmission rod is movably arranged on the connecting plate.
Preferably, the load-bearing collection structure includes: the pair of bearing frames, the first accommodating body and the second accommodating body are identical in structure;
it is a pair of bear its both ends respectively the movable dress of dress and adorn in the relative draw-in groove of cabinet internal side wall, and lie in the mutual symmetry of both sides about the central line, first storage body is for not having wall and antetheca box structure, and its left and right sides wall top central point department all sets up the spout that the structure is the same, first storage body activity is laid in the internal lower wall of cabinet, the second storage body is for not having upper wall and back lateral wall box structure, and just is close to rear end left and right sides wall central point department and has all seted up the stopper, the second storage body activity is inlayed and is adorned in first storage body, and its stopper equal activity runs through in the spout.
Preferably, the fire extinguishing structure includes: the device comprises a temperature sensor, a bottom plate, a three-way pipe, an electromagnetic valve and a dry powder fire extinguisher;
the dry powder fire extinguisher is characterized in that the temperature sensor is fixedly arranged on the rear side wall in the cabinet body and is positioned at the central part, one end of the bottom plate is fixedly welded on the right side wall of the cabinet body and is close to the bottom end, a placing groove is formed in the central part of the upper wall of the bottom plate, two ends of the three-way pipe are respectively and fixedly embedded in the right side wall of the cabinet body and are respectively positioned on a central line, the electromagnetic valve is fixedly arranged on the other end of the three-way pipe, and the dry powder fire extinguisher is movably arranged on the bottom plate and is positioned in the placing groove.
Preferably, the bearing frame is of an L-shaped structure, and a plurality of through holes with the same structure are arranged on two side walls of the bearing frame at equal intervals.
Preferably, the first receptacle is larger in size than the second receptacle.
Preferably, the limiting plate is of an L-shaped structure.
Preferably, the mounting rack is of a concave structure.
Preferably, the first baffle is of a circular structure.
The safety protection power distribution cabinet provided by the invention has the beneficial effects that:
1. the invention can install electric devices through the bearing frame in the bearing and collecting structure to separate the electric devices, the heat of the wall surface is too concentrated to cause heat, and meanwhile, the containing space can be enlarged by the first containing body and the second containing body to be used for collecting the extinguishing dry powder;
2. the heat dissipation structure is driven by the electric telescopic rod in the heat dissipation structure to control the first baffle and the second baffle to be linked and lifted, so that flowing heat dissipation of inlet and outlet air is realized, sealing can be formed by closing to avoid oxygen after fire catching, and the fire is prevented from increasing;
3. according to the fire extinguishing structure, the temperature sensor in the fire extinguishing structure senses the temperature rise to a certain degree after fire catching, the control electromagnetic valve is opened, fire extinguishing is carried out by means of the dry powder fire extinguisher, the fire extinguishing structure and the heat dissipation structure can be implemented in a matched mode, and the effects of sealing, fire extinguishing and later-period collection and cleaning are achieved.
Drawings
FIG. 1 is a schematic view of the split structure of the present invention;
FIG. 2 is a schematic view of a partially assembled structure of the present invention;
FIG. 3 is a schematic view of the overall assembly structure of the present invention;
fig. 4 is a schematic diagram of a partially enlarged structure a of the present invention.
In the figure: 1. the cabinet body, 2, cabinet door, 3, the lock, 4, heat radiation structure, 41, the fan, 42, the mounting bracket, 43, electric telescopic handle, 44, even board, 45, the connecting rod, 46, first baffle, 47, the limiting plate, 48, the second baffle, 49, the transfer line, 5, bear and collect the structure, 51, bear the frame, 52, first storage body, 53, the second storage body, 6, the structure of putting out a fire, 61, temperature sensor, 62, the bottom plate, 63, the three-way pipe, 64, the solenoid valve, 65, the dry powder fire extinguisher.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution: a safety protection switch board, includes: the cabinet comprises a cabinet body 1, a cabinet door 2 and a door lock 3; the cabinet body 1 is of a box body structure without a front wall, the left side wall and the right side wall of the cabinet body are both provided with a pair of clamping grooves with the same structure, the clamping grooves are respectively positioned at the upper side and the lower side of a central line and are mutually symmetrical, the upper wall of the cabinet body 1 is provided with a matching groove and is positioned close to the central line of the rear end, the central part of the rear side wall of the cabinet body is provided with a heat dissipation port, the cabinet door 2 is movably arranged on the front wall edge of the cabinet body 1, the door lock 3 is fixedly arranged on the rear side wall of the cabinet door 2, one end of the door lock is movably embedded in the cabinet door 2 and; the heat dissipation structure 4 is fixedly arranged on the inner upper wall of the cabinet body 1, the bearing collection structure 5 is detachably arranged in the cabinet body 1 and is positioned below the heat dissipation structure 4, and the fire extinguishing structure 6 is fixedly arranged on the right side wall of the cabinet body 1; the heat dissipation structure 4 includes: the device comprises a fan 41, a mounting frame 42, an electric telescopic rod 43, a connecting plate 44, a pair of connecting rods 45 with the same structure, a first baffle 46, a pair of limiting plates 47 with the same structure, a second baffle 48 and a transmission rod 49; a fan 41 is fixedly embedded in the upper wall of the cabinet body 1 and is positioned at the central part in the conjunction groove, a mounting frame 42 is fixedly welded on the inner upper wall of the cabinet body 1 and is positioned on the central line close to the rear end and is positioned under the fan 41, an electric telescopic rod 43 is fixedly arranged on the inner upper wall of the mounting frame 42 and is positioned at the central part, a connecting rod 45 is fixedly welded on the driving end of the electric telescopic rod 43 and is positioned in the mounting frame 42, one end of each connecting rod 45 is fixedly welded on the two ends of the upper wall of the connecting rod 45, the other end of each connecting rod is movably penetrated through the upper wall of the cabinet body 1 and is positioned at the left side and the right side in the conjunction groove, a first baffle 46 is fixedly welded on the other end of the connecting rods 45 and is movably embedded in the conjunction groove, a pair of limiting plates 47 are respectively fixedly welded on the inner rear side wall of the cabinet body and are respectively positioned at the left side and the, one end of the transmission rod 49 is movably arranged on the upper wall of the second baffle plate 48 and is positioned at the central part, and the other end of the transmission rod 49 is movably arranged on the connecting plate; the heat dissipation structure 4 can generate flowing wind force to dissipate heat.
The following electric devices have the following types and functions:
electric telescopic rod: it is prior art, as long as the electric telescopic handle who is applicable to this scheme all can use.
A fan: it is prior art, as long as the fan that is applicable to this scheme all can use.
Electromagnetic valve: it is prior art, as long as the solenoid valve that is applicable to this scheme all can use.
A temperature sensor: it is prior art, as long as the temperature sensor who is applicable to this scheme all can use.
Preferably, further, the carrying and collecting structure 5 comprises: a pair of carriers 51, a first housing 52, and a second housing 53 having the same structure;
the two ends of the bearing frame 51 are movably embedded in the corresponding clamping grooves in the inner side wall of the cabinet body 1 respectively, the two sides of the bearing frame are symmetrical with each other about the central line, the first accommodating body 52 is of a box structure without an upper wall and a front wall, sliding grooves with the same structure are formed in the center positions of the top ends of the left side wall and the right side wall of the bearing frame, the first accommodating body 52 is movably arranged on the lower wall of the cabinet body 1, the second accommodating body 53 is of a box structure without an upper wall and a rear side wall, limiting blocks are formed in the center positions of the left side wall and the right side wall of the rear end, the second accommodating body 53 is movably embedded in the first accommodating body.
Preferably, the fire extinguishing structure 6 further comprises: a temperature sensor 61, a bottom plate 62, a three-way pipe 63, an electromagnetic valve 64 and a dry powder fire extinguisher 65;
the temperature sensor 61 is fixedly arranged on the inner rear side wall of the cabinet body 1 and is positioned at the central part, one end of the bottom plate 62 is fixedly welded on the right side wall of the cabinet body 1 and is close to the bottom end, a placing groove is formed in the central part of the upper wall of the bottom plate, two ends of the three-way pipe 63 are respectively and fixedly embedded in the right side wall of the cabinet body 1 and are respectively positioned on a central line, the electromagnetic valve 64 is fixedly arranged on the other end of the three-way pipe 63, the dry powder fire extinguisher 65 is movably arranged on the bottom plate 62 and is positioned in the placing groove, and the outlet end.
As an optimized scheme, the bearing frame 51 is an L-shaped structure, and two side walls of the bearing frame are equally spaced and provided with a plurality of through holes with the same structure, so as to meet design requirements and facilitate installation of electric devices.
Preferably, the first receiving body 52 is larger than the second receiving body 53 for design requirements and convenience of installation.
Preferably, the limiting plate 47 is an L-shaped structure, so as to facilitate limiting.
Preferably, the mounting frame 42 is a concave structure to facilitate mounting and carrying.
Preferably, the first baffle 46 is of a circular configuration to facilitate sealing.
All the electrical components in the present application are connected with the power supply adapted to the electrical components through the wires, and an appropriate controller should be selected according to actual conditions to meet the control requirements, and specific connection and control sequences should be obtained.
Example (b): as can be seen from fig. 1-4 of the specification, the bearing frame 51 in the bearing and collecting structure 5 is installed in the cabinet body 1, and can be used for bearing and installing electrical devices, so that the electrical devices have a certain distance, heat dissipation is facilitated, and the cabinet door 2 can be closed and locked by the door lock 3; when the cabinet is normally used, the electric telescopic rod 43 on the mounting rack 42 in the heat dissipation structure 4 can be controlled to extend and drive, the connecting plate 44 is subjected to force transmission to enable the first baffle 46 on the connecting rod 45 to ascend, meanwhile, the transmission rod 49 is used for transmission, the second baffle 48 limited by the limiting plate 47 is driven to ascend, and then the fan 41 is driven to blow air into the cabinet 1 and air is discharged through the air outlet to form a circulation; when an internal fire breaks out, the temperature sensor 61 senses the temperature, the first baffle 46 in the heat dissipation structure 4 descends to fit with the upper wall of the cabinet body 1, the second baffle 48 descends to seal the air outlet to form sealing, and then the electromagnetic valve 64 is opened, so that the dry powder fire extinguisher 65 on the middle bottom plate 62 of the fire extinguishing structure 6 sprays dry powder into the cabinet body 1 through the three-way pipe 63 to extinguish the fire; the second receiving body 53 in the first receiving body 52 can be pulled to increase the receiving space for loading the dry powder for cleaning at a later stage.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A safety protection switch board, includes: the cabinet comprises a cabinet body (1), a cabinet door (2) and a door lock (3); the novel cabinet is characterized in that the cabinet body (1) is of a box body structure without a front wall, a pair of clamping grooves with the same structure are formed in the inner left side wall and the inner right side wall of the cabinet body, the clamping grooves are respectively positioned on the upper side and the lower side of a central line and are mutually symmetrical, a matching groove is formed in the upper wall of the cabinet body (1) and is positioned close to the central line of the rear end, a heat dissipation opening is formed in the central position of the rear side wall of the cabinet body, the cabinet door (2) is movably arranged on the front wall edge of the cabinet body (1), the door lock (3) is fixedly arranged on the rear side wall of the cabinet door (2), one end of the door lock is movably embedded in the cabinet door (2) and is positioned on the central line, and a heat;
the heat dissipation structure (4) is fixedly arranged on the inner upper wall of the cabinet body (1), the bearing collection structure (5) is detachably arranged in the cabinet body (1) and is positioned below the heat dissipation structure (4), and the fire extinguishing structure (6) is fixedly arranged on the right side wall of the cabinet body (1);
the heat dissipation structure (4) includes: the device comprises a fan (41), a mounting frame (42), an electric telescopic rod (43), a connecting plate (44), a pair of connecting rods (45) with the same structure, a first baffle (46), a pair of limiting plates (47) with the same structure, a second baffle (48) and a transmission rod (49);
the fan (41) is fixedly embedded in the upper wall of the cabinet body (1) and is positioned at the central part in the conjunction groove, the mounting frame (42) is fixedly welded on the upper wall in the cabinet body (1) and is positioned on the central line close to the rear end and is positioned under the fan (41), the electric telescopic rod (43) is fixedly arranged on the upper wall in the mounting frame (42) and is positioned at the central part, the connecting rod (45) is fixedly welded on the driving end of the electric telescopic rod (43) and is positioned in the mounting frame (42), one end of each connecting rod (45) is fixedly welded on two ends of the upper wall of the connecting rod (45), the other end of each connecting rod is movably penetrated through the upper wall of the cabinet body (1) and is positioned at the left side and the right side in the conjunction groove, the first baffle (46) is fixedly welded on the other end of each connecting rod (45) and is movably embedded in the conjunction groove, the limiting plates (47) are fixedly welded on the rear side wall in the cabinet body, the second baffles (48) are movably embedded between the pair of limiting plates (47), one end of the transmission rod (49) is movably arranged on the upper wall of the second baffles (48) and is positioned at the central part, and the other end of the transmission rod is movably arranged on the connecting plate.
2. The safety protection switch board of claim 1, characterized in that: the load-bearing collection structure (5) comprising: a pair of carriers (51), a first receiving body (52) and a second receiving body (53) which have the same structure;
it is a pair of bear its both ends of frame (51) activity respectively and inlay and adorn in the relative draw-in groove of the cabinet body (1) inside wall, and lie in the mutual symmetry of both sides about the central line, first storage body (52) are for not having wall and antetheca box structure, and its left and right sides wall top center part department all sets up the spout that the structure is the same, lower wall in the cabinet body (1) is laid in first storage body (52) activity, second storage body (53) are for not having upper wall and back lateral wall box structure, and just are close to rear end left and right sides wall center part department and have all seted up the stopper, second storage body (53) activity is inlayed and is adorned in first storage body (52), and its stopper is all movable and is run through in the spout.
3. The safety protection switch board of claim 1, characterized in that: the fire extinguishing structure (6) comprises: a temperature sensor (61), a bottom plate (62), a three-way pipe (63), an electromagnetic valve (64) and a dry powder fire extinguisher (65);
the temperature sensor (61) is fixedly arranged on the rear side wall in the cabinet body (1) and is positioned at the central position, one end of the bottom plate (62) is fixedly welded on the right side wall of the cabinet body (1) and is close to the bottom end, a placing groove is formed in the central position of the upper wall of the bottom plate, two ends of the three-way pipe (63) are respectively and fixedly embedded in the right side wall of the cabinet body (1) and are respectively positioned on a central line, the electromagnetic valve (64) is fixedly arranged on the other end of the three-way pipe (63), the dry powder fire extinguisher (65) is movably arranged on the bottom plate (62) and is positioned in the placing groove, and the outlet end of the dry powder fire extinguisher is connected with the.
4. The safety protection switch board of claim 2, characterized in that: the bearing frame (51) is of an L-shaped structure, and a plurality of through holes with the same structure are arranged on two side walls of the bearing frame at equal intervals.
5. The safety protection switch board of claim 2, characterized in that: the first receptacle (52) is larger in size than the second receptacle (53).
6. The safety protection switch board of claim 1, characterized in that: the limiting plate (47) is of an L-shaped structure.
7. The safety protection switch board of claim 1, characterized in that: the mounting frame (42) is of a concave structure.
8. The safety protection switch board of claim 1, characterized in that: the first baffle (46) is of a circular structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010321056.2A CN111641122B (en) | 2020-04-21 | 2020-04-21 | Safety protection switch board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010321056.2A CN111641122B (en) | 2020-04-21 | 2020-04-21 | Safety protection switch board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111641122A true CN111641122A (en) | 2020-09-08 |
| CN111641122B CN111641122B (en) | 2021-11-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010321056.2A Active CN111641122B (en) | 2020-04-21 | 2020-04-21 | Safety protection switch board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111641122B (en) |
Cited By (2)
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| CN114725861A (en) * | 2022-03-23 | 2022-07-08 | 重庆大学 | Cable guard box for electrical engineering |
| CN114784638A (en) * | 2022-03-09 | 2022-07-22 | 南京欣静电力设备安装有限公司 | Convenient-to-overhaul power distribution cabinet |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114784638A (en) * | 2022-03-09 | 2022-07-22 | 南京欣静电力设备安装有限公司 | Convenient-to-overhaul power distribution cabinet |
| CN114784638B (en) * | 2022-03-09 | 2024-05-31 | 南京欣静电力设备安装有限公司 | Power distribution cabinet convenient to overhaul |
| CN114725861A (en) * | 2022-03-23 | 2022-07-08 | 重庆大学 | Cable guard box for electrical engineering |
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| Publication number | Publication date |
|---|---|
| CN111641122B (en) | 2021-11-30 |
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