Medium voltage switchgear cable room grounding switch operation interlock device

Abstract

The present invention relates to an operating interlocking device for a grounding switch in a cable room of a medium-voltage switch cabinet. The back of a bracket is fixed on a cabinet body of the medium-voltage switch cabinet, a push plate is fixed on a cabinet door of the medium-voltage switch cabinet, and a stopper is connected to the front of the bracket through a fixing rod I. The stopper can move left and right with the fixing rod I, and the stopper is connected to the fixing frame through a connecting rod passing through an upper end plate of the bracket; the upper end of the fixing frame is fixedly connected to the interlocking plate through a fixing pin, and the interlocking plate is connected to a positioning pin fixed on the cabinet body of the medium-voltage switch cabinet through a positioning groove on the interlocking plate for positioning and guiding connection; a sliding plate is connected between a middle plate and a bottom plate of the bracket through a fixing rod II, and a compression spring is sleeved on the fixing rod II located between the sliding plate and the middle plate of the bracket; the bottom of the sliding plate is connected to the bracket for positioning and sliding connection; when the cabinet door of the medium-voltage switch cabinet is closed, the push plate pushes the stopper and presses the sliding plate at the same time, and the stopper drives the interlocking plate to slide and block the connecting rod of the grounding switch, so as to prevent misoperation of the grounding switch, avoid risks and safety hazards caused by misoperation, and ensure personal safety.

Description

Technical Field

[0001] The invention relates to a medium voltage switch cabinet for ship and land use, in particular to an operating interlocking device for a grounding switch in a cable room of a medium voltage switch cabinet. Background Art

[0002] As the application scope of medium voltage switchgear continues to expand, the application fields continue to increase, and the safety requirements for it are becoming higher and higher. Experience shows that a large number of misoperation accidents on medium voltage switchgear should have been avoidable, but due to imperfect interlocking functions, they failed to avoid a large number of casualties and equipment damage.

[0003] When medium-voltage switchgear is used as power distribution equipment, improper operation of the grounding switch or unreliable interlocking will cause serious consequences. In order to make the interlocking of the medium-voltage switchgear more reliable, the present invention / utility model patent can ensure that the equipment is not energized due to misoperation during maintenance and repair, thereby eliminating potential accidents.

[0004] The existing medium voltage switch cabinet grounding switch interlock generally prevents misoperation by using a positioning pin in the grounding switch operating shaft. In this way, if the grounding switch operating shaft is improperly operated during operation, the positioning pin is easily damaged or deformed, destroying the interlock, thereby failing to achieve the interlock function. In order to avoid unnecessary personal injury and equipment damage, it is necessary to propose a medium voltage switch cabinet cable room grounding switch operation interlock device. Summary of the invention

[0005] The present invention provides an operation interlock device for a grounding switch in a cable room of a medium voltage switch cabinet, which can effectively avoid misoperation during maintenance, effectively ensure the safety of personnel and equipment, and improve the safety and reliability of the equipment.

[0006] To achieve the above-mentioned purpose, the technical scheme of the present invention is: an operating interlock device for a grounding switch in a cable room of a medium-voltage switch cabinet, comprising an interlocking plate, a fixing frame, a block, a bracket, and a push plate, wherein the back of the bracket is fixed to a cabinet body of the medium-voltage switch cabinet, the push plate is fixed to a cabinet door of the medium-voltage switch cabinet, the front of the bracket is connected to the block by a transversely arranged fixing rod I, a spring is sleeved on the fixing rod I between the rear end plate of the bracket and the block, the block can move left and right with the fixing rod I, the block is connected to the fixing frame by a connecting rod transversely arranged through the upper end plate of the bracket; the fixing frame can move left and right with the connecting rod; the upper end of the fixing frame is fixedly connected to the interlocking plate by a fixing pin, and the interlocking plate The positioning groove on the interlocking plate is connected with the positioning pin fixed on the cabinet body of the medium-voltage switch cabinet through the positioning groove, so that the interlocking plate can slide on the positioning pin through the positioning groove; the sliding plate is connected between the middle plate and the bottom plate of the bracket through the fixing rod II, and a compression spring is sleeved on the fixing rod II located between the sliding plate and the middle plate of the bracket; the bottom of the sliding plate is positioned and slidably connected with the bracket, and can slide up and down with the compression spring on the fixing rod II; when closing the cabinet door of the medium-voltage switch cabinet, the push plate pushes the block and presses the slide plate at the same time, and the block drives the interlocking plate to slide and block the grounding switch connecting rod, which can prevent the grounding switch from being operated incorrectly, avoid the risks and safety hazards caused by incorrect operation, and ensure personal safety.

[0007] Furthermore, the middle area and the top of the block are respectively fixed to the fixing rod 1 and one end of the connecting rod by bolts.

[0008] Furthermore, the fixing frame is positioned on the connecting rod by a retaining spring.

[0009] Furthermore, the top end of the fixing rod II is fixed to the bracket with bolts; the fixing rod II passes through the slide plate, and the compression spring on the fixing rod II is positioned by the retaining ring and the slide plate.

[0010] Furthermore, the top of the slide plate is provided with an oblique angle, and the bottom of the fixing frame is provided with a protrusion, and the oblique angle on the top of the slide plate is used to stop the fixing frame and facilitate the sliding of the fixing frame.

[0011] Furthermore, the slide plate is provided with a sliding opening to facilitate the push plate to slide in;

[0012] Furthermore, one end of the connecting rod, the fixing rod I and the fixing rod II is fastened with bolts, and the other end is slotted for easy fastening.

[0013] The beneficial effects of the present invention are:

[0014] (1) The interlocking device of the present invention has good anti-misoperation and reliability properties;

[0015] (2) The present invention adopts a mechanical interlocking method, which can effectively avoid misoperation, improve the safety and reliability of the equipment, and reduce the risk of accidents.

[0016] (3) The interlocking device of the present invention has a simple structure, is easy to operate, safe and reliable. The interlocking device design can prevent misoperation and improve equipment and personal safety.

[0017] (4) The present invention adopts mechanized design and programmed process, which is safe and reliable, avoids equipment damage and misoperation due to operating errors, eliminates operating hazards, and achieves the purpose of reducing accident risks and improving reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of the structure of the earthing switch operating interlock device in the cable room of the medium-voltage switchgear;

[0019] Figure 2 This is the main view of the structure of the grounding switch operating interlock device in the cable room of the medium voltage switch cabinet;

[0020] Figure 3 yes Figure 2 Rear view of

[0021] Figure 4 yes Figure 3 K-direction view. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] like Figures 1 to 4 As shown, a medium-voltage switch cabinet cable room grounding switch operation interlocking device includes an interlocking plate 1, a positioning pin 2, a fixing pin 3, a fixing frame 4, a connecting rod 5, a stopper 6, a fixing rod I 7, a bracket 8, a fixing rod II 9, a slide plate 10, a push plate 11, and a grounding switch connecting rod 12.

[0024] The bracket 8 is fixed on the cabinet body of the medium-voltage switch cabinet, and is mainly used to position the fixing rod I7 and the connecting rod 5; the middle area and the top of the stopper 6 are respectively fixed to the fixing rod I7 and one end of the connecting rod 5 by bolts; the fixing frame 4 is positioned on the connecting rod 5 by a retaining ring, and can move with the connecting rod 5; the interlocking plate 1 is fixed to the fixing frame 4 by a fixing pin 3, and is positioned by a locating pin 2, and the locating pin 2 is fixed to the cabinet body of the medium-voltage switch cabinet; the locating groove on the interlocking plate 1 slides on the locating pin 2; the stopper 6 drives the fixing frame 4 and the interlocking plate 1 on the connecting rod 5 to move back and forth through the compression spring on the fixing rod I7. The top of the fixed rod II9 is ​​fixed to the bracket 8 with bolts; the fixed rod II9 passes through the slide plate 10, and the compression spring on the fixed rod II9 is ​​positioned by the retaining ring and the slide plate 10; the top of the slide plate 10 is positioned by the fixed rod II9, and the bottom is positioned by the bracket 8, and slides up and down with the compression spring on the fixed rod II9; the top of the slide plate 10 is provided with an angle, and the bottom of the fixed frame 4 is provided with a convex block. The top angle of the slide plate 10 is used to stop the fixed frame 4 and facilitate the sliding of the fixed frame 4; the interlocking plate 1 and the positioning pin 2 move in the limiting groove; the slide plate 10 is provided with a sliding mouth to facilitate the sliding of the push plate 11; the connecting rod 5, the fixed rod I7, and the fixed rod II9 are fastened with bolts at one end, and the other end is slotted for fastening. The push plate 11 is fixed on the door of the medium-voltage switch cabinet. The door-closing push plate 11 pushes the block 6 and presses the slide plate 10 at the same time, driving the internal mechanical linkage of the interlocking device; the interlocking plate 1 slides to block the grounding switch connecting rod 12 to prevent the grounding switch from being operated incorrectly, avoid the risks and safety hazards caused by the misoperation, and ensure personal safety.

[0025] The present invention pushes the internal mechanical interlocking through the push plate 11 on the cable room door, driving the interlocking plate 1 to block the grounding switch connecting rod 12 to achieve the interlocking requirement of the cable room cabinet door closing and operating the grounding switch.

[0026] The medium voltage switch cabinet cable room grounding switch operation interlock device of the present invention is mainly used to ensure the safety of personnel and equipment during inspection and maintenance. The present invention / utility model patent adopts the design of mechanical interlocking, programmed operation mode, mutual interlocking, prevents misoperation, and increases the service life of the equipment. During the operation process, the operation must be carried out according to the design process to ensure the reliability of the interlocking and the safety of the equipment.

[0027] The specific implementation plan of this hair:

[0028] The present invention installs a grounding switch interlocking device on a medium voltage switch cabinet body and a cable room door.

[0029] When the cable room door of the medium voltage switch cabinet is closed, the push plate 11 on the cabinet door triggers the slide plate 10 and the block 6 in the interlocking device to drive the interlocking movement, triggering the interlocking plate 1 to block the connecting rod operation of the grounding switch 12, so that the grounding switch cannot be operated without closing the cable room cabinet door and the grounding switch is prevented from being operated without closing the cabinet door to prevent the operator from entering the live compartment by mistake, bringing life safety protection to the operator. In addition, through this form, mechanical failures can be effectively avoided, and misoperation can be avoided to cause equipment damage or life safety.

[0030] Therefore, such an interlocking device is safe and reliable to ensure the safety of equipment and personnel.

[0031] The specific implementation process is as follows:

[0032] (1) Input interlocking process:

[0033] First, close the door of the cable room of the medium-voltage switch cabinet, and slide the push plate 11 installed in the cable room door into the interlocking device bracket 8 installed in the cabinet of the medium-voltage switch cabinet, forcing it to push the slide plate 10 and the stopper 6;

[0034] Secondly, by pushing the slide plate 10 and the stopper 6; to force the slide plate 10 to move downward and the stopper 6 to push outward, a thrust is formed by the compression spring on the fixed rod Ⅰ7 during the pushing, and at the same time, a compression spring on the fixed rod Ⅱ9 that fixes the slide plate 10 also forms a thrust for the slide plate 10, forcing it to move downward; under the action of the thrust, the connecting rod 5 fixed on the stopper 6 drives the fixed frame 4 fixed thereon to move together.

[0035] Finally, the interlocking plate 1 fixed by the fixing pin 3 is driven by the fixing frame 4 to move within the positioning range of the positioning pin 2, so that the interlocking plate 1 blocks the grounding switch connecting rod 12, thereby achieving the interlocking purpose.

[0036] (2) Exit interlocking process:

[0037] First, open the door of the cable room of the medium-voltage switch cabinet, and the push plate 11 installed on the cable room door withdraws the interlocking device bracket 8 installed in the cabinet of the medium-voltage switch cabinet, forcing it to push the slide plate 10 and the stopper 6;

[0038] Secondly, exit through the slide plate 10 and the stopper 6; to force the slide plate 10 to move upward and the stopper 6 to push inward, and when pushing, the compression spring on the fixed rod Ⅰ7 is restored to form a thrust to return to the initial state; under the action of the thrust, the connecting rod 5 fixed on the stopper 6 drives the fixed frame 4 fixed thereon to move together, and exit together to the initial state.

[0039] Finally, the interlocking plate 1 fixed by the fixing pin 3 is driven by the fixing frame 4 to move within the positioning range of the positioning pin 2, so that the interlocking plate 1 is withdrawn from blocking the grounding switch connecting rod 12, thereby achieving the purpose of releasing the interlocking.

Claims

1. An operating interlocking device for a grounding switch in a cable room of a medium voltage switch cabinet, comprising an interlocking plate, a fixing frame, a stopper, a bracket, and a push plate, characterized in that: The back of the bracket is fixed to the cabinet body of the medium-voltage switch cabinet, the push plate is fixed to the cabinet door of the medium-voltage switch cabinet, the front of the bracket is connected to the block through a transversely arranged fixing rod I, the fixing rod I between the rear end plate of the bracket and the block is sleeved with a spring, the block can move left and right with the fixing rod I, the block is connected to the fixing frame through a connecting rod transversely arranged through the upper end plate of the bracket; the fixing frame can move left and right with the connecting rod; the upper end of the fixing frame is fixedly connected to the interlocking plate through a fixing pin, and the interlocking plate is fixed to the cabinet body of the medium-voltage switch cabinet through a positioning groove on the interlocking plate The positioning pin on the body is positioned and guided so that the interlocking plate can slide on the positioning pin through the positioning groove; the middle plate and the bottom plate of the bracket are connected to the slide plate through the fixing rod II, and a compression spring is sleeved on the fixing rod II located between the slide plate and the middle plate of the bracket; the bottom of the slide plate is positioned and slidably connected with the bracket and can slide up and down with the compression spring on the fixing rod II; the top of the slide plate is provided with an angle, and the bottom of the fixing frame is provided with a convex block, and the angle at the top of the slide plate is used to stop the fixing frame and facilitate the sliding of the fixing frame; the slide plate is provided with a sliding opening to facilitate the sliding of the push plate; When closing the door of the medium-voltage switch cabinet, the push plate pushes the block and presses the slide plate at the same time. The block drives the interlocking plate to slide and block the grounding switch connecting rod, which can prevent misoperation of the grounding switch, avoid risks and safety hazards caused by misoperation, and ensure personal safety.

2. The medium voltage switch cabinet cable room grounding switch operation interlocking device according to claim 1 is characterized in that: The middle area and the top of the stopper are respectively fixed to the fixing rod 1 and one end of the connecting rod by bolts.

3. The medium voltage switch cabinet cable room grounding switch operation interlocking device according to claim 1 is characterized in that: The fixing bracket is positioned on the connecting rod through a retaining spring.

4. The medium voltage switch cabinet cable room grounding switch operation interlocking device according to claim 1, characterized in that: The top end of the fixing rod II is fixed to the bracket by bolts; the fixing rod II passes through the slide plate, and the compression spring on the fixing rod II is positioned by the clamping ring and the slide plate.

5. The medium voltage switch cabinet cable room grounding switch operation interlocking device according to claim 1 is characterized in that: One end of the connecting rod, the fixing rod I and the fixing rod II is fastened with bolts, and the other end is slotted for easy fastening.

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