Environment-friendly gas ring main unit operation limiting device

Abstract

An operation limiting device for an environment-friendly gas ring main unit relates to the field of electrical cabinets, is arranged on the outer side of a grounding switch and an isolating switch of the ring main unit, and comprises a limiting plate, an operation handle, a limiting mechanism and a fixing mechanism, and a grounding operation hole and an isolating operation hole which are respectively opposite to the grounding switch and the isolating switch are formed in the limiting plate; the operating handle can respectively extend into the grounding operating hole and the isolating operating hole and is connected with the grounding switch and the isolating switch so as to drive the switches to rotate; the limiting mechanism comprises limiting grooves and limiting blocks. The limiting grooves are formed in the side faces of the grounding operation hole and the isolation operation hole respectively. The limiting block is formed on the side face of the operation handle and moves in the limiting groove along with rotation of the operation handle to limit the rotation amplitude of the operation handle. And the fixing mechanism is arranged on the limiting plate to fix the limiting plate in the ring main unit. The limiting groove is formed in the limiting plate to limit the rotation amplitude of the limiting block in the limiting groove, the rotation amplitude of the operation handle is limited, the operation handle is prevented from controlling the switch to rotate excessively, and safety is improved.

Description

Technical Field

[0001] The utility model belongs to the field of electrical cabinets, and particularly relates to an operating limit device for an environmentally friendly gas ring main unit. Background Art

[0002] A ring main unit is a set of power transmission and distribution electrical equipment (high-voltage switchgear) installed in a metal or non-metal insulated cabinet or made into a prefabricated sectionalized ring main power supply unit. An earthing switch and a disconnector are arranged thereon to realize the earthing and isolation of the connected electrical equipment. Generally, a baffle is arranged on the ring main unit to prevent the earthing switch and the disconnector from being exposed simultaneously to prevent misoperation. When power is supplied, the correct operation process requires first moving the baffle blocking the earthing switch away, then operating the earthing switch to cut off the earthing, then driving the baffle to block the earthing switch and expose the disconnector, and then operating the disconnector to close. Since the earthing switch and the disconnector rotate synchronously, when the earthing switch is disconnected or the disconnector is disconnected, when the operator rotates the switch, it is easy to cause the switch to rotate excessively, resulting in the closing of the disconnector or the earthing switch, and causing two operations to be performed on the same switch (that is, the earthing switch is disconnected at one time and continues to rotate forward to close the disconnector, or the disconnector is disconnected and continues to rotate forward to close the earthing switch), which has great potential safety hazards. In the prior art, a simple limit structure is usually arranged to block the handle, but the structural strength is low, and the driving force required for the switch to rotate is large. When the switch is rotated, the handle is easy to slip off due to insufficient strength of the limit structure, which needs to be improved. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide an operating limit device for an environmentally friendly gas ring main unit.

[0004] The utility model adopts the following technical scheme:

[0005] An operating limit device for an environmentally friendly gas ring main unit is arranged outside the earthing switch and the disconnector of the ring main unit, and comprises a limit plate, an operating handle, a limiting mechanism and a fixing mechanism. The limit plate is arranged outside the earthing switch and the disconnector, and an earthing operation hole and an isolation operation hole corresponding to the earthing switch and the disconnector respectively are formed thereon; the operating handle can extend into the earthing switch and the disconnector respectively through the earthing operation hole and the isolation operation hole to be connected with the earthing switch and the disconnector to drive the switch to rotate; the limiting mechanism is arranged on the limit plate to limit the rotation amplitude of the operating handle; the fixing mechanism is arranged on the limit plate to fix the limit plate in the ring main unit. The fixing mechanism comprises a fixing wing plate and a bottom support plate. The fixing wing plate is arranged on the limit plate and on both sides of the isolation operation hole, extends backward and is fixed on the plate-like structure in the ring main unit; the bottom support plate is arranged on the limit plate and on the side close to the earthing operation hole, extends backward and is connected with the plate-like structure in the ring main unit.

[0006] Preferably, the limiting mechanism includes a limiting groove and a limiting block. The limiting grooves are respectively formed on the sides of the grounding operation hole and the isolating operation hole; the limiting block protrudes outward from the side of the operation handle and can move in the limiting groove as the operation handle rotates to limit the rotation range of the operation handle.

[0007] Preferably, the fixed wing plate includes an extension section vertically connected to the limiting plate and a fixed section vertically extending outward from the end of the extension section. A plurality of fixing holes are formed on the fixed section, and it can be fixed on the plate-like structure in the ring main unit through a bolt-nut pair.

[0008] Preferably, the bottom support plate is a U-shaped steel, including a web and flange plates. The web is connected between the two flange plates. One flange plate is horizontally connected to the limiting plate and the web extends vertically inward. Fixing holes are formed on both flange plates, and it can be fixed on the plate-like structure in the ring main unit through a bolt-nut pair.

[0009] Preferably, an observation hole located between the grounding operation hole and the isolating operation hole and a turntable rotatable with the grounding switch are further formed on the limiting plate. A plurality of circuit connection indication marks are formed on the turntable, and different indication marks can be made to face the observation hole as the switch rotates to reflect the circuit connection condition.

[0010] Preferably, the grounding switch and the disconnecting switch are connected through a gear set. When the disconnecting switch rotates, the grounding switch can drive the turntable to rotate accordingly through the gear set.

[0011] Preferably, the distance from the bottom support plate to the grounding operation hole is less than the distance from the grounding operation hole to the observation hole, and a relief hole for the turntable to pass through is formed on the web.

[0012] Preferably, the distribution directions of the limiting grooves on the grounding operation hole and the isolating operation hole are opposite to each other.

[0013] Preferably, mounting holes adapted to the shape of the operation handle are formed inside the grounding switch and the disconnecting switch. An installation groove for the limiting block to extend into is formed by extending outward from the mounting hole. A clamping block is further formed on the inner wall of the mounting hole, and a clamping groove corresponding to the clamping block is formed by inward depression on the end face of the operation handle. And the limiting block and the clamping block can respectively extend into the installation groove and the clamping groove at the same time.

[0014] As can be seen from the above description of the present invention, compared with the prior art, the beneficial effects of the present invention are as follows: By the fixed wing plate and the bottom support plate respectively close to the isolating operation hole and the grounding operation hole, the structural strength of the limiting plate at this place is improved, the stability of the limiting plate at the operation hole is improved, the handle slipping caused by the instability of the limiting plate when the operation handle rotates is prevented, the excessive rotation of the operation handle for controlling the switch is avoided, and the safety is improved;

[0015] By setting a limit groove on the limit plate to limit the rotation amplitude of the limit block therein, the rotation amplitude of the operating handle is restricted.

[0016] When the earthing switch and the disconnector rotate, they drive the turntable to rotate. The indication mark can be observed through the observation hole provided on the limit plate, enabling the rapid identification of the circuit connection status inside the ring main unit at this time and avoiding misoperation by the staff.

[0017] The limit block can extend into the installation groove, and the clamping block can extend into the clamping groove, which can ensure that the operating handle is correctly connected to the disconnector or the earthing switch to ensure the correct rotation of the earthing switch and the disconnector. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the present utility model;

[0019] Figure 2 is Figure 1 a partial enlarged view of part A in

[0020] Figure 3 It is a schematic diagram of the present utility model installed in a ring main unit;

[0021] Figure 4 It is a schematic structural diagram of the limit plate of the present utility model;

[0022] Figure 5 It is a partial schematic structural diagram of the operating handle of the present utility model;

[0023] In the figure: 1 - earthing switch; 2 - disconnector; 3 - limit plate; 31 - earthing operation hole; 32 - disconnection operation hole; 33 - observation hole; 34 - turntable; 35 - indication mark; 4 - operating handle; 41 - installation hole; 42 - installation groove; 43 - clamping block; 44 - clamping groove; 5 - limit mechanism; 51 - limit groove; 52 - limit block; 6 - fixing mechanism; 61 - fixing wing plate; 611 - extension section; 612 - fixing section; 62 - bottom support plate; 621 - web; 622 - flange plate; 623 - relief hole; 63 - fixing hole; 7 - gear set. Detailed Embodiment

[0024] The following further describes the present utility model through specific embodiments.

[0025] Referring to Figures 1 to 5 as shown, an operating limit device for an environmentally friendly gas ring main unit is provided outside the earthing switch 1 and the disconnector 2 of the ring main unit, and includes a limit plate 3, an operating handle 4, a limit mechanism 5, and a fixing mechanism 6.

[0026] The limiting plate 3 is arranged outside the earthing switch 1 and the disconnector 2, and is formed with an earthing operation hole 31 and a disconnection operation hole 32 corresponding to the earthing switch 1 and the disconnector 2 respectively. The limiting plate 3 is rectangular and arranged vertically. The earthing operation hole 31 is located below the limiting plate 3, and the disconnection operation hole 32 is located above the limiting plate 3. Specifically, the limiting plate 3 is also formed with an observation hole 33 located between the earthing operation hole 31 and the disconnection operation hole 32, and a turntable 34 that can rotate with the earthing switch 1. A number of circuit connection indication marks 35 are formed on the turntable 34. Different indication marks 35 can be made to face the observation hole 33 as the switch rotates to reflect the circuit connection situation. When the earthing switch 1 and the disconnector 2 rotate, they drive the turntable 34 to rotate. The indication marks 35 can be observed through the observation hole 33 provided on the limiting plate 3, enabling the rapid identification of the circuit connection situation inside the ring main unit at this time and avoiding misoperation by the staff. Further, the earthing switch 1 and the disconnector 2 are connected by a gear set 7. When the disconnector 2 rotates, the earthing switch 1 can drive the turntable 34 to rotate accordingly through the gear set 7.

[0027] The operating handle 4 can extend into the earthing operation hole 31 and the disconnection operation hole 32 respectively and be connected to the earthing switch 1 and the disconnector 2 to drive the switch to rotate.

[0028] The limiting mechanism 5 includes a limiting groove 51 and a limiting block 52. The limiting grooves 51 are formed on the sides of the earthing operation hole 31 and the disconnection operation hole 32 respectively; the limiting block 52 protrudes outward from the side of the operating handle 4 and can move in the limiting groove 51 as the operating handle 4 rotates to limit the rotation amplitude of the operating handle 4. By setting the limiting groove 51 on the limiting plate 3 to limit the rotation amplitude of the limiting block 52 therein, the rotation amplitude of the operating handle 4 is restricted, preventing the operating handle 4 from controlling the switch to rotate excessively and improving safety. Specifically, the distribution directions of the limiting grooves 51 on the earthing operation hole 31 and the disconnection operation hole 32 are opposite to each other. The limiting block 52 can extend into the installation groove 42, and the clamping block 43 can extend into the clamping groove 44, which can ensure that the operating handle 4 is correctly connected to the disconnector 2 or the earthing switch 1 to ensure the correct rotation of the earthing switch 1 and the disconnector 2. Further, installation holes 41 adapted to the shape of the operating handle 4 are formed in the earthing switch 1 and the disconnector 2. The installation holes 41 extend outward to form installation grooves 42 for the limiting blocks 52 to extend into. Clamping blocks 43 are also formed on the inner walls of the installation holes 41. The end face of the operating handle 4 is recessed inward to form clamping grooves 44 corresponding to the clamping blocks 43. The limiting blocks 52 and the clamping blocks 43 can simultaneously extend into the installation grooves 42 and the clamping grooves 44 respectively. The width of the limiting block 52 gradually increases from inside to outside, making it easier for the limiting block 52 to be clamped in the installation hole 41. Figure 5It is a structural schematic diagram of the head of the operating handle 4 that can be inserted into the operating hole. The gripping part is not drawn. The gripping part is a common handle in the prior art that is easy to hold to drive the operating handle 4 to rotate around its axis.

[0029] The fixing mechanism 6 is arranged on the limit plate 3 to fix the limit plate 3 in the ring network cabinet. The fixing mechanism 6 includes a fixing wing plate 61 and a bottom support plate 62. The fixing wing plate 61 is arranged on the limit plate 3 and is located on both sides of the isolation operation hole 32. It extends backward and is fixed on the plate-like structure in the ring network cabinet (such as Figure 3 As shown); the bottom support plate 62 is arranged on the limit plate 3 and is located on the side close to the grounding operation hole 31, extending backward and connected to the plate-like structure in the ring network cabinet. The structural strength of the limit plate 3 at this location is improved by the fixed wing plate 61 and the bottom support plate 62 respectively close to the isolation operation hole 32 and the grounding operation hole 31, and the stability of the limit plate 3 at the operation hole is improved to prevent the handle 4 from slipping due to the loose limit plate 3 when the operating handle 4 is rotated, and to avoid excessive rotation of the operating handle control switch. Specifically, the fixed wing plate 61 includes an extension section 611 vertically connected to the limit plate 3 and a fixed section 612 extending vertically outward from the end of the extension section 611. The fixed section 612 is formed with a plurality of fixing holes 63, which can be fixed to the plate-like structure in the ring network cabinet by a bolt and nut pair (as shown in FIG. Figure 3 As shown). Furthermore, the bottom support plate 62 is a U-shaped steel, including a web 621 and a flange plate 622, the web 621 is connected between the two flange plates 622, one side of the flange plate 622 is horizontally connected to the limit plate 3, and the web 621 extends vertically inward, and the two side flange plates 622 are formed with fixing holes 63, which can be fixed to the plate-like structure in the ring network cabinet by a pair of bolts and nuts. By fixing the wing plate 61 and the bottom support plate 62 close to the isolation operation hole 32 and the grounding operation hole 31 respectively, the structural strength of the limit plate 3 at this location is improved, the stability of the limit plate 3 at the operation hole is improved, the parts are fixed more securely, and the service life is increased. Preferably, the distance from the bottom support plate 62 to the grounding operation hole 31 is smaller than the distance from the grounding operation hole 31 to the observation hole 33, and a clearance hole 623 for the turntable 34 to pass through is formed on the web 621.

[0030] When power is supplied, first insert the operating handle 4 into the earthing switch 1, rotate the earthing switch 1 so that it rotates completely from one end to the other end to complete the disconnection of the earthing, then withdraw the operating handle 4 and insert it into the disconnector 2 to drive the disconnector 2 to rotate from one end to the other end to complete the closing. The turntable 34 can rotate respectively with the rotation of the two during the operation process, and make different indicating marks 35 face the observation hole 33, and quickly judge the state of the ring main unit according to the indication. In this application, a limiting groove 51 is added to the earthing operation hole 31 and the isolating operation hole 32 on the limiting plate 3 opposite to the earthing switch 1 and the disconnector 2 to limit the rotation of the operating handle 4, so that the operating handle 4 can effectively avoid excessive rotation of the switch when controlling the rotation of the switch, improving safety. At the same time, a fixed wing plate 61 and a bottom support plate 62 are added to the limiting plate 3 to respectively improve the structural strength at the isolating operation hole 32 and the earthing operation hole 31, improving the service life, and having high practicability.

[0031] The above is only a preferred embodiment of the present utility model, and thus cannot limit the scope of implementation of the present utility model. That is, equivalent changes and modifications made according to the scope of the patent application of the present utility model and the content of the specification should still fall within the scope covered by the patent of the present utility model.

Claims

1. An environmentally friendly gas ring main unit operation limit device is arranged outside the earthing switch and disconnector of the ring main unit, and is characterized in that: It includes a limit plate, an operating handle, a limiting mechanism and a fixing mechanism. The limit plate is arranged on the outside of the earthing switch and the disconnector. Earthing operation holes and isolation operation holes corresponding to the earthing switch and the disconnector respectively are formed thereon. The operating handle can extend into and be connected with the earthing switch and the disconnector respectively from the earthing operation hole and the isolation operation hole to drive the switch to rotate. The limiting mechanism is arranged on the limit plate to limit the rotation range of the operating handle. The fixing mechanism is arranged on the limit plate to fix the limit plate in the ring main unit. The fixing mechanism includes a fixing wing plate and a bottom support plate. The fixing wing plate is arranged on the limit plate and on both sides of the isolation operation hole, extends backward and is fixed on the plate-like structure in the ring main unit. The bottom support plate is arranged on the limit plate and on the side close to the earthing operation hole, extends backward and is connected with the plate-like structure in the ring main unit.

2. The operating limit device for an environmentally friendly gas ring main unit according to claim 1, wherein: The limiting mechanism includes a limiting groove and a limiting block. The limiting grooves are respectively formed on the sides of the earthing operation hole and the isolation operation hole. The limiting block protrudes outward from the side of the operating handle and can move in the limiting groove as the operating handle rotates to limit the rotation range of the operating handle.

3. The operation limit device of an environmentally friendly gas ring main unit according to claim 2, characterized in that: The fixing wing plate includes an extension section vertically connected to the limit plate and a fixing section vertically extending outward from the end of the extension section. A number of fixing holes are formed on the fixing section and can be fixed on the plate-like structure in the ring main unit through a bolt-nut pair.

4. An environmental protection gas ring main unit operation limit device according to claim 2, characterized in that: The bottom support plate is a U-shaped steel, including a web plate and flange plates. The web plate is connected between the two flange plates. One flange plate is horizontally connected to the limit plate and makes the web plate extend vertically inward. Fixing holes are formed on both flange plates and can be fixed on the plate-like structure in the ring main unit through a bolt-nut pair.

5. An environmental protection gas ring main unit operation limit device according to claim 4, characterized in that: An observation hole is also formed on the limit plate between the earthing operation hole and the isolation operation hole, and a turntable that can rotate with the earthing switch is arranged on the earthing switch. A number of circuit connection indication marks are formed on the turntable and can rotate with the switch to make different indication marks face the observation hole to reflect the circuit connection condition.

6. The operation limit device for an environmentally friendly gas ring main unit according to claim 5, characterized in that: The earthing switch and the disconnector are connected through a gear set. When the disconnector rotates, the earthing switch can drive the turntable to rotate through the gear set.

7. An environmentally friendly gas ring main unit operation limit device according to claim 5, characterized in that: The distance from the bottom support plate to the earthing operation hole is less than the distance from the earthing operation hole to the observation hole, and a relief hole for the turntable to pass through is formed on the web plate.

8. The operation limit device for an environmentally friendly gas ring main unit according to claim 2, characterized in that: The distribution directions of the limiting grooves on the earthing operation hole and the isolation operation hole are opposite to each other.

9. The operation limit device for an environmentally friendly gas ring main unit according to claim 2, characterized in that: Installation holes adapted to the shape of the operating handle are formed in the earthing switch and the disconnector. An installation groove for the limiting block to extend into is formed by extending the installation hole outward. A clamping block is also formed on the inner wall of the installation hole. A clamping groove corresponding to the clamping block is formed by inwards recessing the end face of the operating handle. And the limiting block and the clamping block can respectively extend into the installation groove and the clamping groove at the same time.

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