Ring main unit three-station isolation device

Abstract

The utility model relates to the field of ring main units, in particular to a three-station isolating device of a ring main unit, which comprises a mounting seat. A transmission shaft, supporting rods, a connecting rod, a first rotating shaft, a connecting seat, a second rotating shaft, a fixing seat, a gear and a rack are further included, the transmission shaft is rotationally connected to the right side surface of the mounting seat in a penetrating mode, and the outer surface of the transmission shaft is connected with three sets of symmetrical supporting rods; by arranging the rack, the rack can drive the gear to rotate when moving front and back, the gear can drive the transmission shaft to rotate, the transmission shaft can enable the supporting rod to drive the connecting rod to rotate when rotating, and the upper end of the connecting rod can pull the connecting base to rotate along the second rotating shaft through the first rotating shaft; therefore, the upper end of the connecting seat is in contact with the corrugated pipe compensator at the rear side of the disconnecting switch, the purposes of opening and closing are achieved, the overall structure adopts a symmetrical design, the layout is compact, the service life of the device is prolonged, the reliability of the device is improved, the occupied space is reduced, and the cost of the device is reduced.

Description

Technical Field

[0001] This utility model relates to the field of ring main units, and in particular to a three-station isolation device for ring main units. Background Technology

[0002] The three-position isolation device in a ring main unit is a mechanical switch that integrates three functional states. It is mainly used in power systems to realize circuit isolation, grounding and connection control. Its core feature is that it can switch between three fixed positions through a single operating mechanism to ensure operational safety and reliability.

[0003] The existing three-position isolation device for ring main units has a complex structure with many small parts. During operation, it is prone to deformation due to insufficient structural strength. The overall size is large, and the installation space is limited, which is not conducive to installation, adjustment and maintenance. The interlocking and indication are transmitted through multiple stages, which is complex and the position is inaccurate. When the mechanism is in the open position, the open limit holding structure is complex and is prone to significant wear during frequent operation.

[0004] Therefore, in view of the problems of the existing three-station isolation device being complex in structure, insufficient in strength and heavy in wear, there is an urgent need to design a new type of ring main unit three-station isolation device. Utility Model Content

[0005] In order to overcome the problems of existing three-station isolation devices having complex structures, insufficient strength, and heavy wear.

[0006] The technical solution of this utility model is as follows: a three-position isolation device for a ring main unit, including a mounting base; it also includes a drive shaft, support rods, connecting rods, a first rotating shaft, a connecting seat, a second rotating shaft, a fixed seat, a gear, and a rack. The right side surface of the mounting base is rotatably connected to the drive shaft. The outer surface of the drive shaft is connected to three sets of symmetrical support rods. The upper end of the support rods is rotatably connected to a connecting rod. The upper position of the outer surface of the connecting rod is rotatably connected to the first rotating shaft. The left and right ends of the first rotating shaft are rotatably connected to the connecting seat. The front side of the inner surface of the connecting seat is rotatably connected to the second rotating shaft. The outer surface of the second rotating shaft is rotatably connected to the fixed seat. The fixed seat is connected to the bellows compensator of the disconnect switch. A gear is provided at the right end of the drive shaft. A rack meshes with the lower side of the outer surface of the gear.

[0007] Preferably, by setting a rack, the rack can drive the gear to rotate when it moves back and forth. The gear will then drive the transmission shaft to rotate. When the transmission shaft rotates, the support rod will drive the connecting rod to rotate. The upper end of the connecting rod will pull the connecting seat to rotate along the second rotating shaft through the first rotating shaft, so that the upper end of the connecting seat contacts the bellows compensator on the back side of the disconnecting switch, thereby achieving the purpose of opening and closing the switch. The overall structure adopts a symmetrical design and compact layout, which improves the service life and reliability of the device, reduces the space occupied, and reduces the cost of the device. This solves the problems of existing ring main unit three-position isolation devices, which have complex structures, many small parts, are prone to deformation due to insufficient structural strength during operation, have a large overall volume, limited installation space, and are not conducive to installation, adjustment and maintenance. The locking and indication are complex and inaccurate in position due to multi-stage transmission. When the mechanism is in the open position, the opening limit holding structure is complex and prone to large wear during frequent operation.

[0008] Preferably, a guide rail is installed on the upper surface of the mounting base corresponding to the position of the rack, and the rack and the guide rail are slidably connected.

[0009] Preferably, a slider is installed on the bottom surface of the rack, and the rack is slidably connected to the guide rail through the slider.

[0010] Preferably, baffles are provided at both the front and rear ends of the guide rail, and two symmetrical fixing screws are installed on the side of the baffle away from the guide rail. The baffles are fixed to the guide rail by the fixing screws.

[0011] Preferably, a positioning seat is provided on the upper surface of the mounting base located behind the guide rail. A threaded tube is connected to the inner surface of the positioning seat, and a lead screw is rotatably connected to the inner surface of the threaded tube. The front end of the lead screw is rotatably connected to the rear surface of the rack.

[0012] Preferably, one end of a connecting rod is fixed to the rear end of the lead screw, and a knob is provided at the other end of the connecting rod.

[0013] Preferably, the lead screw and the connecting rod are fixed by welding, and the knob and the connecting rod are fixed by adhesive backing.

[0014] The beneficial effects of this utility model are:

[0015] 1. By setting a rack, when the moving rack moves linearly, the meshing gear rotates accordingly, driving the transmission shaft to rotate synchronously. The support rod fixed on the transmission shaft swings accordingly, pushing the connecting rod to rotate around the first rotating shaft. Then, the upper end of the connecting rod pulls the connecting seat to rotate around the second rotating shaft as a fulcrum. Finally, the upper end of the connecting seat contacts the bellows compensator on the rear side of the disconnecting switch, completing the opening or closing operation. The overall structure adopts a symmetrical design and compact layout, which improves the service life and reliability of the device, reduces the space occupied, and reduces the cost of the device. This solves the problems of existing ring main unit three-position isolation devices, which have complex structures, many small parts, are prone to deformation due to insufficient structural strength during operation, have a large overall volume, limited installation space, are not conducive to installation, adjustment and maintenance, and have complex structures and inaccurate positions due to multi-stage transmission for locking and indication. When the mechanism is in the open position, the opening limit holding structure is complex and prone to significant wear during frequent operation. Attached Figure Description

[0016] Figure 1 The diagram shown is a three-dimensional structural schematic of the three-position isolation device for the ring main unit of this utility model.

[0017] Figure 2 The diagram shown is a three-dimensional structural schematic of the connecting rod of the three-position isolation device for the ring main unit of this utility model.

[0018] Figure 3 The diagram shown is a three-dimensional structural schematic of the rack and pinion structure of the three-position isolation device for the ring main unit of this utility model.

[0019] Figure 4 The diagram shown is a three-dimensional structural schematic of the slider of the three-position isolation device for the ring main unit of this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1. Mounting base; 2. Drive shaft; 3. Support rod; 4. Connecting rod; 5. First rotating shaft; 6. Connecting seat; 7. Second rotating shaft; 8. Fixed seat; 9. Gear; 10. Rack; 11. Guide rail; 12. Slider; 13. Baffle; 14. Fixing screw; 15. Positioning seat; 16. Threaded tube; 17. Lead screw; 18. Connecting rod; 19. Knob. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Please see Figures 1-4This utility model provides an embodiment of a three-position isolation device for a ring main unit, including a mounting base 1; it also includes a drive shaft 2, support rods 3, connecting rods 4, a first rotating shaft 5, a connecting seat 6, a second rotating shaft 7, a fixed seat 8, a gear 9, and a rack 10. The drive shaft 2 is rotatably connected through the right side surface of the mounting base 1. Three sets of symmetrical support rods 3 are connected to the outer surface of the drive shaft 2. The upper end of the support rods 3 is rotatably connected to the connecting rod 4. The first rotating shaft 5 is rotatably connected through the upper part of the outer surface of the connecting rod 4. The left and right ends of the first rotating shaft 5 are rotatably connected to the connecting seat 6. The front side of the inner surface of the connecting seat 6 is rotatably connected to the second rotating shaft 7. The outer surface of the second rotating shaft 7 is rotatably connected to the fixed seat 8. The fixed seat 8 and the isolating switch are connected by a wave... The bellows compensator is connected to the transmission shaft 2. A gear 9 is provided on the right end of the transmission shaft 2. A rack 10 meshes with the lower side of the outer surface of the gear 9. By setting the rack 10, the rack 10 can drive the gear 9 to rotate when it moves back and forth. The gear 9 will drive the transmission shaft 2 to rotate. When the transmission shaft 2 rotates, the support rod 3 will drive the connecting rod 4 to rotate. The upper end of the connecting rod 4 will pull the connecting seat 6 to rotate along the second rotating shaft 7 through the first rotating shaft 5. This will make the upper end of the connecting seat 6 contact the bellows compensator on the back side of the disconnecting switch, thereby realizing the purpose of opening and closing the switch. The overall structure adopts a symmetrical design and compact layout, which improves the service life and reliability of the device, reduces the space occupied, and reduces the cost of the device.

[0023] Please see Figures 1-4 In this embodiment, a guide rail 11 is installed on the upper surface of the mounting base 1 at the position corresponding to the rack 10. The rack 10 is slidably connected to the guide rail 11. By setting the guide rail 11, the rack 10 can be assisted to move, improving the stability of the rack 10's movement. A slider 12 is installed on the bottom surface of the rack 10. The rack 10 is slidably connected to the guide rail 11 through the slider 12. By setting the slider 12, it can cooperate with the groove of the guide rail 11 to limit the sliding direction of the rack 10, thereby improving the accuracy of the device operation. Baffles 13 are set at both the front and rear ends of the guide rail 11. Two symmetrical fixing screws 14 are installed on the side surface of the baffle 13 away from the guide rail 11. The baffle 13 is fixed to the guide rail 11 by the fixing screws 14. By setting the baffle 13, the displacement distance of the rack 10 can be limited, preventing the rack 10 from detaching from the guide rail 11.

[0024] Please see Figures 1-4In this embodiment, a positioning seat 15 is provided on the upper surface of the mounting base 1, located behind the guide rail 11. A threaded tube 16 is connected to the inner surface of the positioning seat 15, and a lead screw 17 is rotatably connected to the inner surface of the threaded tube 16. The front end of the lead screw 17 is rotatably connected to the rear surface of the rack 10. By setting the lead screw 17, when the lead screw 17 is rotated, the lead screw 17 can move back and forth in the threaded engagement with the threaded tube 16, thereby driving the rack 10 to move back and forth. One end of a connecting rod 18 is fixed to the rear end of the lead screw 17, and a knob 19 is provided at the other end of the connecting rod 18. By setting the knob 19, it is easy for the operator to rotate the connecting rod 18, thereby driving the lead screw 17 to rotate. The lead screw 17 and the connecting rod 18 are fixed by welding, and the knob 19 and the connecting rod 18 are fixed by adhesive backing. By using welding to fix the lead screw 17 and the connecting rod 18, the fixing strength can be improved and loosening can be avoided. The knob 19 is made of insulating rubber and has high insulation, thereby improving the safety of operation.

[0025] During operation, the guide rail 11 assists the rack 10 in moving, improving the smoothness of its movement. The slider 12 engages with the groove of the guide rail 11, limiting the sliding direction of the rack 10 and thus improving the accuracy of the device's operation. The baffle 13 limits the displacement distance of the rack 10, preventing it from disengaging from the guide rail 11. The lead screw 17 engages with the threaded tube 16 when rotated, moving back and forth and driving the rack 10 to move back and forth. The knob 19 allows the operator to easily rotate the connecting rod 18, which in turn rotates the lead screw 17. Welding is used to fix the lead screw 17 and the connecting rod 18, increasing the fixing strength and preventing loosening. The knob 19 is made of insulating rubber, providing high insulation and improving operational safety.

[0026] Through the above steps, by setting rack 10, when the moving rack 10 moves linearly, the meshing gear 9 rotates accordingly, driving the transmission shaft 2 to rotate synchronously. The support rod 3 fixed on the transmission shaft 2 swings accordingly, pushing the connecting rod 4 to rotate around the first rotating shaft 5. Then, the upper end of the connecting rod 4 pulls the connecting seat 6 to rotate around the second rotating shaft 7 as the fulcrum. Finally, the upper end of the connecting seat 6 contacts the bellows compensator on the rear side of the disconnecting switch, completing the opening or closing operation. The overall structure adopts a symmetrical design and a compact layout, which improves the service life and reliability of the device, reduces the space occupied, and reduces the cost of the device. This solves the problems of the existing three-position isolation device of the ring main unit, which has a complex structure, many small parts, and is prone to deformation due to insufficient strength of the mechanism during operation. The overall volume is large, the installation space is limited, and it is not conducive to installation, adjustment and maintenance. The locking and indication are through multiple transmission stages, which are complex in structure and inaccurate in position. When the mechanism is in the opening position, the opening limit holding structure is complex and prone to large wear during frequent operation.

[0027] It should be understood that this embodiment is for illustrative purposes only and is not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A three-position isolation device for a ring main unit, comprising a mounting base (1); characterized in that: It also includes a drive shaft (2), a support rod (3), a connecting rod (4), a first rotating shaft (5), a connecting seat (6), a second rotating shaft (7), a fixed seat (8), a gear (9), and a rack (10). The right side surface of the mounting seat (1) is rotatably connected to the drive shaft (2). The outer surface of the drive shaft (2) is connected to three sets of symmetrical support rods (3). The upper end of the support rod (3) is rotatably connected to the connecting rod (4). The upper position of the outer surface of the connecting rod (4) is rotatably connected to the first rotating shaft (5). The left and right ends of the first rotating shaft (5) are rotatably connected to the connecting seat (6). The front side of the inner surface of the connecting seat (6) is rotatably connected to the second rotating shaft (7). The outer surface of the second rotating shaft (7) is rotatably connected to the fixed seat (8). The fixed seat (8) is connected to the bellows compensator of the disconnecting switch. The right end of the drive shaft (2) is provided with a gear (9). The lower side of the outer surface of the gear (9) is meshed with a rack (10).

2. The ring main unit three-station isolation device according to claim 1, characterized in that: A guide rail (11) is installed on the upper surface of the mounting base (1) at the position corresponding to the rack (10), and the rack (10) and the guide rail (11) are slidably connected.

3. The ring main unit three-station isolation device according to claim 2, characterized in that: A slider (12) is mounted on the bottom surface of the rack (10), and the rack (10) is slidably connected to the guide rail (11) through the slider (12).

4. The ring main unit three-station isolation device according to claim 2, characterized in that: Both ends of the guide rail (11) are provided with baffles (13). Two symmetrical fixing screws (14) are installed on the side of the baffle (13) away from the guide rail (11). The baffle (13) is fixed to the guide rail (11) by the fixing screws (14).

5. The three-position isolation device for ring main units according to claim 1, characterized in that: The upper surface of the mounting base (1) is provided with a positioning seat (15) located behind the guide rail (11). The inner surface of the positioning seat (15) is connected to a threaded tube (16). The inner surface of the threaded tube (16) is rotatably connected to a lead screw (17). The front end of the lead screw (17) is rotatably connected to the rear surface of the rack (10).

6. The three-station isolation device for ring main units according to claim 5, characterized in that: One end of a connecting rod (18) is fixed to the rear end of the lead screw (17), and a knob (19) is provided at the other end of the connecting rod (18).

7. The three-station isolation device for a ring main unit according to claim 6, characterized in that: The lead screw (17) and the connecting rod (18) are fixed together by welding, and the knob (19) and the connecting rod (18) are fixed together by adhesive backing.

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