CN104167678B - Device and the application process thereof of 110 kilovolts of isolating switches of charged for replacement - Google Patents

Abstract

The invention discloses a device for replacing a 110 kV isolating switch with electricity and its application method. The device includes a connecting rod assembly and a supporting rod assembly connected below it. Wire fastening card. The operation steps of short-circuiting the drain wire before replacing the isolation switch are as follows: first assemble the support rod assembly and the connecting rod assembly on the ground, then hang the shunt wire fastening clips at both ends of the connecting rod assembly on the shunt wire respectively, The shunt line is clamped by the shunt line fastening card through the electric insulating operating rod on the ground, and the connecting bolt between the drain line and the isolating switch pile head is withdrawn through the electric insulating operating rod, and the middle section of the connecting rod is moved upward through the supporting rod assembly. Top, until the horizontal sides of the middle section and the left and right sections are on the same horizontal line, fix the vertical pole of the support rod assembly, and then the replacement operation of the disconnector can be started. There is no need for staff to enter the equipotential operation, and it has the advantages of simple operation and high safety.

Description

Device for replacing 110 kV isolating switch with electricity and its application method

technical field

The invention relates to a device for replacing an isolating switch in a substation, in particular to a device for replacing a 110 kV isolating switch with electricity and an application method thereof.

Background technique

With the development of society, the demand for power supply is increasing year by year, and the requirements for power supply reliability are also getting higher and higher. The substation is the central station of power supply, which plays a vital role in ensuring the reliability of power supply, and the primary electrical equipment of our substation is affected by electromechanical load, construction quality, climate and environment for a long time during the power supply process, and there will be differences After detailed understanding, the failure rate of isolating switches in Hunan Province is higher than that of other primary equipment, and it is prone to overheating of connection points, oxidation and corrosion of operating mechanical parts, resulting in poor contact or insensitive operation, and even more isolating switches. If there is a fault, the above defects directly endanger the normal power supply of our equipment. In the past, we relied on the transfer of loads for power outages for maintenance. When transferring loads, it involves scheduling and the work of multiple teams. The operation is complicated and the maintenance time is too long, which reduces the system. Power supply reliability, and even misuse accidents may occur.

Contents of the invention

The object of the present invention is to provide a device for replacing a 110 kV isolating switch with electricity with simple operation and high safety.

The invention discloses a device for replacing a 110 kV isolating switch with electricity, which comprises a connecting rod assembly and a supporting rod assembly connected below the connecting rod assembly. The connecting rod includes three sections of left, middle and right, the shape of the left and right sections is an L-shaped bar, the middle section is a straight bar, and the left and right sections are hinged to the middle section; the support rod assembly is connected below the middle section, The shunt line fastening clips are respectively connected to the outer ends of the left and right sections of the connecting rod.

Both ends of the middle section of the connecting rod are provided with a U-shaped groove along its length, the upper side of the groove is the blind side, and the inner ends of the left and right sections of the connecting rod extend into the groove. They are hinged by a pin perpendicular to the groove.

The shunt line fastening clip includes a snap ring fixedly connected to the outer ends of the left and right sections of the connecting rod. The snap ring is surrounded by an arc edge and an L-shaped edge. The threaded through hole in the direction, the threaded through hole is equipped with a corresponding connecting screw rod, and the inner end of the connecting screw rod is connected with an arc ring arranged symmetrically with the arc edge of the snap ring.

The support rod assembly includes two vertical upright rods and a pull rod connected between the upright rods. The upper ends of the two upright rods are connected with parallel horizontal connecting rods, and the outer walls of the inner ends of the horizontal connecting rods are connected with reinforced enclosures.

The vertical rod is a round rod, including upper and lower sections connected by threads and sleeves. The horizontal connecting rod is a square rod. The upper end of the vertical rod is connected with a square collar, and the horizontal connecting rod passes through the collar and passes through the Bolt tight.

The upper, lower and left and right sides of the horizontal connecting rod are provided with paired perforations, and the left and right sides of the collar have corresponding paired perforations corresponding to the left and right sides of the horizontal connecting rod.

The upper and lower sides of the reinforcing frame are provided with paired perforations corresponding to the upper and lower sides of the horizontal connecting rod.

The lower side of the middle section of the connecting rod is connected with a connecting stud, and the connecting stud passes through the reinforcing frame and the horizontal connecting rod from top to bottom and is fastened by a nut.

The invention also discloses a method for replacing the isolating switch by using the above-mentioned device, which includes the following steps:

(1) Assemble the connecting rod assembly and the supporting rod assembly on the ground, and at the same time adjust the distance between the vertical rod of the supporting rod assembly and the connecting rod to meet the removal space of the lower metal parts of the disconnector;

(2) The operator moves along the insulating ladder to the grounding knife switch and removes the grounding knife switch;

(3) The ground operator uses the electric insulating operating rod to hang the shunt line fastening cards at both ends of the connecting rod assembly on the shunt line respectively, and then pushes the connecting screw on the shunt line fastening card through the electric insulating operating rod, so that The arc ring connected to its inner end and the arc edge on the clasp fasten the shunt line together;

(4) The ground operator pushes up the vertical rod of the support rod assembly, and at the same time adjusts the height of the vertical rod until the middle section of the connecting rod and the horizontal sides of the left and right sections are on the same horizontal line, then fix the vertical rod;

(5) The ground operators use the electric insulating operating rod to withdraw the connecting bolts between the drain wire and the pile head of the isolating switch, and use the electric insulating operating rod to separate the drain wire from the pile head;

(6) The ground operator adjusts the height of the pole, and raises the connecting rod holding the drainage line upward until a sufficient safety distance is met between the connecting rod and the drainage line and the isolation switch frame platform;

(7) The operator goes to the horizontal position of the isolating switch frame, and cooperates with the ground operators to replace the isolating switch with a forklift or an insulating pole.

The working principle of the device disclosed in the present invention is as follows: first assemble the support rod assembly and the connecting rod assembly on the ground, then hang the shunt line fastening clips at both ends of the connecting rod assembly on the shunt line respectively, and then pass the electric insulation operation rod Push the connecting screw on the fastening card of the shunt line, so that the connected arc ring and the arc edge of the snap ring will block the shunt line together. Pull out the connection bolts between the drain wire and the isolating switch pile head through the electric insulating operating rod, and then push up the middle section of the connecting rod through the support rod assembly until the middle section of the connecting rod and the horizontal sides of the left and right sections are on the same horizontal line After fixing the pole, the replacement operation of the isolating switch can be started.

Before using the device to replace the isolating switch, the short-circuiting operation of the shunt line can be performed on the ground, without the need for staff to enter the equipotential operation, and has the advantages of simple operation and high safety.

Description of drawings

Fig. 1 is a schematic structural diagram of a preferred embodiment of the present invention.

FIG. 2 is a schematic top view of FIG. 1 .

FIG. 3 is an enlarged schematic diagram of part A in FIG. 2 .

detailed description

Preferred embodiment, as shown in FIGS. 1 to 3 , the present invention discloses a device for live replacement of a 110 kV isolating switch, including a connecting rod assembly 1 and a supporting rod assembly 2 .

The connecting rod assembly 1 includes a connecting rod 11 and two shunt wire fastening clips 12 . The connecting rod 11 includes three sections of left, middle and right, the left and right sections are hingedly connected with the middle section, the support rod assembly 2 is connected under the middle section of the connecting rod, and two shunt line fastening clips 12 are respectively connected to the connecting rod 11 the outer ends of the left and right sections. Both ends of the middle section of the connecting rod 11 are provided with a U-shaped groove along its length direction, the upper side of the groove is the blind side, and the inner ends of the left and right sections of the connecting rod 11 extend into the groove. They are hinged by a pin perpendicular to the groove. The shape of the left and right sections of the connecting rod 11 is an L-shaped bar, and the middle section is a straight bar. The shunt line fastening clip 12 includes a snap ring 121 fixedly connected to the outer ends of the left and right sections of the connecting rod 11. The snap ring 121 is surrounded by an arc edge and an L-shaped edge. The threaded through hole in the direction, the threaded through hole is equipped with a corresponding connecting screw 122, and the inner end of the connecting screw 122 is connected with an arc ring 123 arranged symmetrically with the arc edge of the snap ring 121.

The support rod assembly 2 includes two vertically arranged vertical rods 21 and a pull rod 22 connected between the vertical rods 21. The upper ends of the two vertical rods 21 are connected with parallel horizontal connecting rods 23, and the inner ends and outer walls of the horizontal connecting rods 23 are connected. There is a reinforced surrounding frame 24 . The vertical rod 21 is a round rod, including upper and lower sections connected by threads and sleeves, the horizontal connecting rod 23 is a square rod, and the upper end of the vertical rod 21 is connected with a square collar 25 . The upper, lower and left and right sides of the horizontal connecting rod 23 are provided with paired perforations, and the left and right sides of the collar 25 have corresponding paired perforations with the left and right sides of the horizontal connecting rod 23. Fasten by bolts after passing through the collar 25 .

The lower side of the middle section of the connecting rod 11 is connected with a connecting stud 13, and the upper and lower sides of the reinforcing frame 24 are provided with corresponding perforations corresponding to the upper and lower sides of the horizontal connecting rod 23, and the connecting stud 13 passes through from top to bottom After strengthening the surrounding frame 24 and the horizontal connecting rod 23, it is tightened by nuts.

The support rod assembly 2 is made of insulating material except for the reinforced frame 24, and the connecting rod assembly 1 is made of metal material.

The present invention utilizes the above device to replace a 110 kV isolating switch with electricity, and the method for replacing the isolating switch comprises the following steps:

(1) Assemble the connecting rod assembly 1 and the supporting rod assembly 2 on the ground, and at the same time adjust the distance between the vertical rod 21 of the supporting rod assembly 2 and the connecting rod 11, so as to satisfy the removal space of the lower metal parts of the isolation switch ;

(2) The operator moves along the insulating ladder to the grounding knife switch and removes the grounding knife switch;

(3) The ground operator uses the electric insulating operating rod to hang the shunt line fastening cards 2 at both ends of the connecting rod assembly 1 on the shunt line respectively, and then pushes the connection on the shunt line fastening card 2 through the electric insulating operating rod. The screw 122, the arc ring 123 connected to its inner end and the arc edge on the snap ring 121 fasten the shunt line together;

(4) The ground operator pushes up the vertical rod 21 of the support rod assembly 2, and at the same time adjusts the height of the vertical rod 21 until the middle section of the connecting rod 11 and the horizontal sides of the left and right sections are on the same horizontal line, and then the vertical rod 21 fixed;

(5) The ground operators use the electric insulating operating rod to withdraw the connecting bolts between the drain wire and the pile head of the isolating switch, and use the electric insulating operating rod to separate the drain wire from the pile head;

(6) The ground operator adjusts the height of the vertical pole, and raises the connecting rod 11 holding the drainage line upward until a sufficient safety distance is satisfied between the connecting rod 11 and the drainage line and the isolation switch frame platform;

(7) The operator goes to the horizontal position of the isolating switch frame, and cooperates with the ground operators to replace the isolating switch with a forklift or an insulating pole.

Claims (9)

1. a device for 110 kilovolts of isolating switches of charged for replacement, is characterized in that: this device comprises connecting rod assembly and the support bar assembly that is connected in its below, and connecting rod assembly comprises connecting rod and is connected to the shunt line fastener at its two ends; Connecting rod comprises three sections of left, center, right, left and right section be shaped as L-type bar, interlude is straight-bar, left and right two sections hinged with interlude; Support bar assembly is connected in the below of connecting rod interlude, and shunt line fastener is connected to the outer end of left and right two sections of connecting rod.

2. the device of 110 kilovolts of isolating switches of charged for replacement as claimed in claim 1, it is characterized in that: the two ends of described connecting rod interlude all offer groove along its length, the upside of groove is blind side, the inner that connecting rod is left and right two sections is stretched in this groove, between the two by hinged perpendicular to the bearing pin of this groove.

3. the device of 110 kilovolts of isolating switches of charged for replacement as claimed in claim 2, it is characterized in that: described shunt line fastener comprises the snap ring that is fixedly connected on left and right section of outer end of described connecting rod, snap ring is surrounded by arc-shaped side and L-type limit, on the relative edge of arc-shaped side, offer the tapped through hole along its thickness direction, supporting in tapped through hole have a corresponding connecting screw rod, and the inner of connecting screw rod is connected with the arc ring being arranged symmetrically with snap ring arc-shaped side.

4. the device of 110 kilovolts of isolating switches of charged for replacement as claimed in claim 1, it is characterized in that: described support bar assembly comprises two vertical rods that vertically arrange and is connected in the pull bar between vertical rod, the upper end of two vertical rods is connected with parallel waling stripe, and the inner outer wall of waling stripe is connected with strengthens enclosing frame.

5. the device of 110 kilovolts of isolating switches of charged for replacement as claimed in claim 4, it is characterized in that: described vertical rod is round bar, comprise upper and lower two sections that connect by screw thread and sleeve pipe, waling stripe is square bar, the upper end of vertical rod is connected with the square collar, and waling stripe passes through bolted after passing from the collar.

6. the device of 110 kilovolts of isolating switches of charged for replacement as claimed in claim 5, it is characterized in that: the upper and lower side of described waling stripe and left and right side are provided with perforation, the arranged on left and right sides of the described collar has with waling stripe arranged on left and right sides accordingly to perforation.

7. the device of 110 kilovolts of isolating switches of charged for replacement as claimed in claim 4, is characterized in that: the upper and lower side that frame is enclosed in described reinforcement is provided with the upper and lower side of described waling stripe accordingly to perforation.

8. the device of 110 kilovolts of isolating switches of charged for replacement as claimed in claim 4, is characterized in that: the downside of described connecting rod interlude is connected with connecting stud, and connecting stud passes through fastening nuts after enclosing frame and waling stripe through described reinforcement from top to bottom.

9. utilize the device of the 110 kilovolts of isolating switches of charged for replacement described in claim 1 to change a method for isolating switch, comprise the following steps:

(1) connecting rod assembly and support bar assembly are assembled on ground, adjust the distance between vertical rod and the connecting rod of support bar assembly simultaneously, be as the criterion with the dismounting space that meets isolating switch lower metal part;

(2) operating personnel arrives grounding switch place along insulation double ladder and removes grounding switch;

(3) Ground Operation personnel adopt electronic insulating bar that the shunt line fastener at connecting rod assembly two ends is hung on respectively on shunt line, promote the connecting screw rod on shunt line fastener by electronic insulating bar again, make its inner arc ring connecting with shunt line is fastening together with arc-shaped side on snap ring;

(4) Ground Operation personnel up push up the vertical rod of support bar assembly, regulate the height of vertical rod simultaneously, until the horizontal sides of the interlude of connecting rod and left and right section is fixed vertical rod after on same level line;

(5) the electronic insulating bar of Ground Operation librarian use exits the connecting bolt of drainage thread and isolating switch pile crown, by electronic insulating bar, drainage thread and pile crown is departed from;

(6) Ground Operation personnel adjustment vertical rod height, upwards level promotes and blocks the connecting rod of drainage thread, until meet enough safe distances between connecting rod and drainage thread and isolating switch framework platform;

(7) operating personnel, to isolating switch framework horizontal level, cooperatively interacts and utilizes fork truck or insulating mast assembly that isolating switch is changed with Ground Operation personnel.