Interlocking structure for environment-friendly gas insulation ring main unit

Abstract

The utility model discloses an interlocking structure for an environment-friendly gas insulation ring main unit, which comprises an upper cabinet body, a lower cabinet door, an isolation plate and an isolation brake, a door body interlocking device is in bolted connection with the top of the part of the lower cabinet door inside the lower cabinet, the isolation plate is arranged between the upper cabinet body and the lower cabinet door, and the isolation brake is arranged between the upper cabinet body and the lower cabinet door. The lower side wall of the isolation plate is in bolt connection with a cabinet body interlocking device, the door body interlocking device comprises a door body interlocking shell and a safety groove, and the safety groove is formed in the position, close to the lower end, of the rear side wall of the door body interlocking shell. According to the utility model, the door closing condition of the lower cabinet door is detected through the door closing contact, and the safety pin is driven by the spring to extend into the safety groove in the safety rod, so that the driving handle is locked, and the knife switch is blocked by the driving handle and cannot be closed when an operator closes the knife switch, thereby ensuring that the knife switch cannot be closed when the lower cabinet door is not closed. Therefore, the operation safety of workers is fully ensured, and the occurrence of dangerous accidents caused by accidental switching-on is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of ring network cabinets, in particular to a chain structure for environmentally friendly gas-insulated ring network cabinets. Background Art

[0002] The environmentally friendly gas insulated ring main unit is a medium-voltage secondary power distribution equipment, which protects the components inside the cabinet through the insulating gas set inside it. Since the ring main unit is mainly used to distribute and transmit electric energy, ensuring safety is crucial during the operation and maintenance of the ring main unit. Therefore, when opening the lower cabinet door for inspection and maintenance, it is necessary to open the isolation gate first. In order to prevent improper operation by the operator, a chain structure is required to ensure that the lower cabinet door cannot be opened before the isolation gate knife is opened.

[0003] Authorization announcement number CN210403544U discloses a lower door interlocking mechanism, which uses the rotating rod on the isolation gate to point to different positions on the connecting plate to limit the lower door, so that the lower door cannot be opened when the isolation gate on the upper cabinet is closed. When operating, employees can only open the lower door after opening the isolation gate, ensuring the operation of employees and reducing accidents.

[0004] However, technical personnel in this field discovered the following problems with the interlocking mechanism during use: although the device can ensure that the lower cabinet door can be opened only after the isolating gate is opened, and has a simple and stable structure, the isolating gate can be closed when the lower cabinet door is still open. This may result in accidents when the ring main unit is being maintained, possibly due to the accidental closing of the isolating gate while the lower cabinet is being inspected and repaired. Therefore, technical personnel in this field proposed an interlocking structure for an environmentally friendly gas insulated ring main unit in which the isolating gate cannot be closed when the lower cabinet door is open, in order to solve the above problem. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings existing in the prior art, and to propose an interlocking structure for an environmentally friendly gas-insulated ring network cabinet. The interlocking structure for an environmentally friendly gas-insulated ring network cabinet detects the closing condition of the lower cabinet door through a door closing contact, and drives the safety pin to extend into the safety groove inside the safety rod through a spring, thereby locking the driving handle. When the operator closes the switch, the knife switch is blocked by the driving handle and cannot be closed, thereby ensuring that the isolation switch knife switch cannot be closed when the lower cabinet door is not closed, fully ensuring the working safety of workers and personnel, and preventing the occurrence of dangerous accidents caused by accidental closing.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A locking structure for an environmentally friendly gas insulated ring network cabinet, comprising an upper cabinet, a lower cabinet door, an isolation plate and an isolation gate, wherein the lower cabinet door is located inside the lower cabinet and is bolted to a door locker at the top position, the isolation plate is located between the upper cabinet and the lower cabinet door, the lower side wall of the isolation plate is bolted to a cabinet locker, the door locker comprises a door locker housing and a safety groove, and the safety groove is provided at a position close to the lower end of the rear side wall of the door locker housing;

[0008] The cabinet interlock comprises a cabinet interlock shell, a driving handle, a movable cavity, a movable plate, a safety rod, a safety slot, a door closing contact, a driving rod, a safety pin and a guide cone, wherein the movable cavity is arranged inside the cabinet interlock shell, the movable plate is movably connected in the movable cavity through a spring limit, the driving handle is fixedly connected to the top of the movable plate, the safety rod is fixedly connected to the lower side wall of the movable plate, the safety slot is arranged at the bottom of the safety rod, the door closing contact is connected to a side wall of the cabinet interlock shell close to the door interlock through a spring, the door closing contact is used in conjunction with the safety groove, the driving rod is fixedly connected to one end of the door closing contact arranged inside the cabinet interlock shell, the guide cone is fixedly connected to the other end of the driving rod, the safety pin is fixedly connected in the movable cavity through a spring and is located directly below the safety slot, and a side wall of the safety slot close to the guide cone is provided with a slot body used in conjunction with the guide cone;

[0009] Through the above technical scheme, the interlocking structure detects the closing status of the lower cabinet door through the closing contact. When the lower cabinet door is in the open state, due to the lack of squeezing of the lower cabinet door, the spring drives the closing contact to extend. At this time, the closing contact drives the guide cone to extend forward together through the driving rod. When the squeezing of the guide cone is lost, the safety pin is driven by the spring to extend into the safety groove inside the safety rod. At this time, the movable plate cannot move, and the driving handle is locked. When the operator closes the switch, the knife switch is blocked by the driving handle and cannot be closed. This ensures that the isolation switch and knife switch cannot be closed when the lower cabinet door is not closed, fully ensuring the working safety of workers and personnel, and preventing the occurrence of dangerous accidents caused by accidental closing.

[0010] Furthermore, the isolation gate is installed inside the upper cabinet, and the knife gate of the isolation gate is pressed in front of the driving handle when it is closed;

[0011] Through the above technical solution, the operator can close the lower cabinet door by closing the isolation gate knife switch, and open the isolation gate to cancel the restriction on the lower cabinet door. There is no need to open the interlock separately to open and close the cabinet door, which is very convenient.

[0012] Furthermore, the cabinet interlock also includes a driving wedge cone, a clamping plate, and a wedge groove, wherein the clamping plate is connected to the front of the movable cavity through a plurality of springs, the wedge groove is provided on the rear side wall of the clamping plate, the driving wedge cone is fixedly connected to the front side wall of the movable plate, and the driving wedge cone is used in conjunction with the wedge groove;

[0013] Through the above technical solution, when the isolating knife gate is closed, the driving handle drives the movable plate to move backward, and after losing the squeezing of the driving wedge cone, the clamping plate moves downward driven by the spring.

[0014] Furthermore, a card slot is provided at the top of the door body interlocking shell and directly below the protrusion at the bottom of the card plate;

[0015] Through the above technical solution, when the card plate moves downward driven by the spring, the card plate extends into the card slot, thereby locking the lower cabinet door, ensuring that the lower cabinet door cannot be opened when the isolation gate is closed.

[0016] Furthermore, a content slot is provided on the lower end surface of the upper side wall of the cabinet interlocking shell and located just above the card plate;

[0017] Through the above technical solution, the content slot provides space for the card board to move upward.

[0018] The utility model has the following beneficial effects:

[0019] 1. In the utility model, the closing condition of the lower cabinet door is detected by the closing contact. When the lower cabinet door is in the open state, due to the lack of squeezing of the lower cabinet door, the spring drives the closing contact to extend. At this time, the closing contact drives the guide cone to extend forward together through the driving rod. Without the squeezing of the guide cone, the safety pin is driven by the spring to extend into the safety groove inside the safety rod. At this time, the movable plate cannot move, the driving handle is locked, and the operator is blocked by the driving handle when closing the switch, and cannot close the knife switch, thereby ensuring that the isolation switch knife switch cannot be closed when the lower cabinet door is not closed, fully ensuring the working safety of workers and personnel, and preventing the occurrence of dangerous accidents caused by accidental closing.

[0020] 2. In the utility model, the operator can close the lower cabinet door by closing the isolation gate and the knife gate, and can remove the restriction on the lower cabinet door by opening the isolation gate. There is no need to open the interlocking device separately to open and close the cabinet door, which is very convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the installation of an interlocking structure for an environmentally friendly gas insulated ring main unit proposed by the utility model;

[0022] Figure 2 A schematic diagram of a door interlock and a cabinet interlock of an interlocking structure for an environmentally friendly gas insulated ring main unit proposed in the utility model;

[0023] Figure 3 A top view of a door interlock and a cabinet interlock of an interlocking structure for an environmentally friendly gas insulated ring main unit proposed by the utility model;

[0024] Figure 4 for Figure 3 Isometric section view along AA;

[0025] Figure 5 for Figure 4 The enlarged schematic diagram of point B in the middle;

[0026] Figure 6 for Figure 4 The enlarged schematic diagram of the center C;

[0027] Figure 7 A second top view of an interlocking structure for an environmentally friendly gas insulated ring main unit proposed by the utility model;

[0028] Figure 8 for Figure 7 Isometric section view along DD.

[0029] Legend:

[0030] 1. Upper cabinet; 2. Lower cabinet door; 3. Isolation board; 4. Isolation gate; 500, door interlock; 600, cabinet interlock;

[0031] 501, door interlocking shell; 502, card slot; 503, safety groove;

[0032] 601, cabinet interlocking shell; 602, driving handle; 603, movable cavity; 604, movable plate; 605, driving wedge cone; 606, content groove; 607, clamping plate; 608, wedge groove; 609, safety rod; 610, safety groove; 611, safety pin; 612, driving rod; 613, guide cone; 614, door closing contact. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] Reference Figure 1-Figure 8The utility model provides an embodiment: an interlocking structure for an environmentally friendly gas insulated ring network cabinet, comprising an upper cabinet body 1, a lower cabinet door 2, an isolation plate 3 and an isolation gate 4, the lower cabinet door 2 is located inside the lower cabinet and is bolted to a door body interlock 500 at the top position, the isolation plate 3 is located between the upper cabinet body 1 and the lower cabinet door 2, the lower side wall of the isolation plate 3 is bolted to a cabinet interlock 600, the door interlock 500 comprises a door interlock shell 501 and a safety groove 503, the safety groove 503 is arranged at a position close to the lower end of the rear side wall of the door interlock shell 501, the cabinet interlock 600 comprises a cabinet interlock shell 601, a driving handle 602, an active cavity 603, an active cavity 604, a movable cavity 605, a movable cavity 606, a movable cavity 607, a movable cavity 608, a movable cavity 609, a movable cavity 610, a movable cavity 611, a movable cavity 612, a movable cavity 613, a movable cavity 614, a movable cavity 615, a movable cavity 616, a movable cavity 617, a movable cavity 618, a movable cavity 619, a movable cavity 620, a movable cavity 621, a movable cavity 622, a movable cavity 623, a movable cavity 624, a movable cavity 625, a movable cavity 626, a movable cavity 627, a movable cavity 628, a movable cavity 629, a movable cavity 630, a movable cavity 631, a movable cavity 632, a movable cavity 633, a movable cavity 634, a movable cavity 635, a movable cavity 636, a movable cavity 637, a movable cavity 638, a movable cavity 639, Plate 604, safety rod 609, safety slot 610, door closing contact 614, driving rod 612, safety pin 611 and guide cone 613, the movable cavity 603 is opened inside the cabinet interlocking shell 601, the movable plate 604 is movably connected in the movable cavity 603 through a spring limiter, the driving handle 602 is fixedly connected to the top of the movable plate 604, the isolation gate 4 is installed inside the upper cabinet 1, and the knife gate of the isolation gate 4 is pressed in front of the driving handle 602 when closed. The operator can close the lower cabinet door 2 by closing the knife gate of the isolation gate 4, and the restriction on the lower cabinet door 2 can be cancelled by opening the isolation gate 4. There is no need to open the interlock separately to operate the cabinet door opening and closing, which is very convenient.

[0035] The safety rod 609 is fixedly connected to the lower side wall of the movable plate 604, the safety groove 610 is opened at the bottom of the safety rod 609, the door closing contact 614 is connected to the side wall of the cabinet interlocking shell 601 close to the door interlocking device 500 through a spring, the door closing contact 614 is used in conjunction with the safety groove 503, the driving rod 612 is fixedly connected to one end of the door closing contact 614 arranged inside the cabinet interlocking shell 601, the guide cone 613 is fixedly connected to the other end of the driving rod 612, the safety pin 611 is fixedly connected to the movable cavity 603 through a spring and is located directly below the safety groove 610, and the side wall of the safety groove 610 close to the guide cone 613 is opened with a guide cone 613 connected to the guide cone 613. 3, because there is no squeezing of the lower cabinet door 2, the spring drives the door closing contact 614 to extend, and at this time, the door closing contact 614 drives the guide cone 613 to extend forward together through the driving rod 612. Without the squeezing of the guide cone 613, the safety pin 611 is driven by the spring to extend into the safety slot 610 inside the safety rod 609. At this time, the movable plate 604 cannot move, and the driving handle 602 is locked. When the operator closes the switch, the knife switch is blocked by the driving handle 602 and cannot be closed. Therefore, it is ensured that when the lower cabinet door 2 is not closed, the knife switch of the isolation gate 4 cannot be closed, which fully ensures the working safety of the workers and prevents the occurrence of dangerous accidents caused by accidental closing.

[0036] The cabinet interlock 600 also includes a driving wedge cone 605, a clamping plate 607, and a wedge groove 608. The clamping plate 607 is connected to the front of the movable cavity 603 through a plurality of springs. The wedge groove 608 is provided on the rear side wall of the clamping plate 607. The driving wedge cone 605 is fixedly connected to the front side wall of the movable plate 604. The driving wedge cone 605 and the wedge groove 608 are used in conjunction. When the isolation gate 4 is closed, the driving handle 602 drives the movable plate 604 to move to the rear side. After the extrusion of the driving wedge cone 605 is lost, the clamping plate 607 moves downward under the drive of the spring, and a card slot 502 is provided at the top of the door body interlocking shell 501 and directly below the bottom protrusion of the card plate 607. When the card plate 607 moves downward under the drive of the spring, the card plate 607 extends into the card slot 502, thereby locking the lower cabinet door 2, ensuring that the lower cabinet door 2 cannot be opened when the isolation gate 4 is closed. An inner slot 606 is provided on the lower end surface of the upper side wall of the cabinet body interlocking shell 601 and directly above the card plate 607. The inner slot 606 provides space for the card plate 607 to move upward.

[0037] Working principle: When the isolation gate 4 is closed, the driving handle 602 drives the movable plate 604 to move backward. After losing the squeezing of the driving wedge cone 605, the card plate 607 moves downward under the drive of the spring. When the card plate 607 moves downward under the drive of the spring, the card plate 607 extends into the card slot 502, thereby locking the lower cabinet door 2, ensuring that the lower cabinet door 2 cannot be opened when the isolation gate 4 is closed. When the lower cabinet door 2 is in the open state, the closing state of the lower cabinet door 2 is detected through the closing contact 614. Since there is no squeezing of the lower cabinet door 2, the spring drives the closing contact 614 extends out, and at this time, the closing contact 614 drives the guide cone 613 to extend forward together through the driving rod 612. Under the pressure of losing the guide cone 613, the safety pin 611 extends into the safety groove 610 inside the safety rod 609 driven by the spring. At this time, the movable plate 604 cannot move, and the driving handle 602 is locked. When the operator closes the switch, the knife switch is blocked by the driving handle 602 and cannot be closed. Therefore, it is ensured that the knife switch of the isolation gate 4 cannot be closed when the lower cabinet door 2 is not closed, which fully ensures the working safety of the workers and prevents the occurrence of dangerous accidents caused by accidental closing of the switch.

[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An interlocking structure for an environmentally friendly gas insulated ring main unit, comprising an upper cabinet body (1), a lower cabinet door (2), an isolation plate (3) and an isolation gate (4), characterized in that: The lower cabinet door (2) is bolted to a door interlock (500) at the top of the lower cabinet, the isolation plate (3) is located between the upper cabinet (1) and the lower cabinet door (2), the lower side wall of the isolation plate (3) is bolted to a cabinet interlock (600), the door interlock (500) comprises a door interlock shell (501) and a safety groove (503), the safety groove (503) is arranged at a lower end of the rear side wall of the door interlock shell (501); The cabinet interlock (600) comprises a cabinet interlock shell (601), a driving handle (602), a movable cavity (603), a movable plate (604), a safety rod (609), a safety slot (610), a door closing contact (614), a driving rod (612), a safety pin (611) and a guide cone (613); the movable cavity (603) is arranged inside the cabinet interlock shell (601); the movable plate (604) is movably connected in the movable cavity (603) through a spring limiter; the driving handle (602) is fixedly connected to the top of the movable plate (604); the safety rod (609) is fixedly connected to the lower side wall of the movable plate (604); the safety slot (610) is arranged on the safety rod ( 609), the door closing contact (614) is connected to a side wall of the cabinet interlocking shell (601) close to the door interlock (500) through a spring, the door closing contact (614) is used in conjunction with the safety groove (503), the driving rod (612) is fixedly connected to one end of the door closing contact (614) arranged inside the cabinet interlocking shell (601), the guide cone (613) is fixedly connected to the other end of the driving rod (612), the safety pin (611) is fixedly connected to the movable cavity (603) through a spring and is located directly below the safety groove (610), and a groove body used in conjunction with the guide cone (613) is opened on a side wall of the safety groove (610) close to the guide cone (613).

2. The interlocking structure for an environmentally friendly gas insulated ring main unit according to claim 1, characterized in that: The isolation gate (4) is installed inside the upper cabinet (1), and the knife gate of the isolation gate (4) is pressed in front of the driving handle (602) when it is closed.

3. The interlocking structure for an environmentally friendly gas insulated ring main unit according to claim 2, characterized in that: The cabinet interlock (600) further comprises a driving wedge-shaped cone (605), a clamping plate (607), and a wedge-shaped groove (608); the clamping plate (607) is connected to the front of the movable cavity (603) via a plurality of springs; the wedge-shaped groove (608) is provided on the rear side wall of the clamping plate (607); the driving wedge-shaped cone (605) is fixedly connected to the front side wall of the movable plate (604); and the driving wedge-shaped cone (605) and the wedge-shaped groove (608) are used in conjunction with each other.

4. The interlocking structure for an environmentally friendly gas insulated ring main unit according to claim 3 is characterized in that: A card slot (502) is provided at the top of the door body interlocking housing (501) and directly below the bottom protrusion of the card plate (607).

5. The interlocking structure for an environmentally friendly gas insulated ring main unit according to claim 3, characterized in that: A content groove (606) is provided on the lower end surface of the upper side wall of the cabinet interlocking shell (601) and directly above the clamping plate (607).

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