Extra-high voltage strain tower end porcelain bottle replacement auxiliary device and use method thereof

Abstract

The utility model provides an extra -high voltage strain tower end porcelain bottle replacement auxiliary device, including M arc type link plate and parallel hanging plate, two pieces of M arc type link plate are symmetrically arranged in the utility model discloses, and a plurality of bolt holes for connecting are equipped on M arc type link plate, one end of parallel hanging plate is fixed in the middle of two pieces of M arc type link plate, is connected through high -strength bolt, and the other end is stretched out M arc type link plate outside, and the stretched out end is equipped with construction hole, parallel hanging plate is equipped with four pieces of parallel hanging plate, and is sequentially arranged in the inner arc end portion of M arc type link plate, the utility model discloses still include the use method of extra -high voltage strain tower end porcelain bottle replacement auxiliary device, utilize the utility model, can effectively realize porcelain bottle special fixture and auxiliary device connection, and installation, disassembly is convenient, reduces construction safety risk and labour intensity, reduces manpower, material resources investment, shortens construction cycle.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of power transmission line construction, and particularly relates to an auxiliary device for replacing end porcelain bottles of a UHV tension tower and a method for using the same. BACKGROUND

[0002] The UHV DC power transmission line has the characteristics of high voltage level, long transmission distance and high construction technical requirement. In the Shanbei-Hubei ±800kV UHV DC power transmission line project (YU2 section), the tension tower uses 550kN suspension porcelain bottle four series double hanging point tension string, each series has 89 porcelain bottles, the string length is 25m, the tension string self weight is 127kN, and the wire uses 6xJL1 / G2A-1250 / 100 type steel core aluminum stranded wire, and the operating tension of each phase wire is up to 468kN.

[0003] Due to external environment, improper construction and other factors, the installed end porcelain bottles are damaged, which affects the operation and maintenance safety of the power transmission line, and therefore it is necessary to design an auxiliary device for replacing the end porcelain bottles.

[0004] At present, there is a mature special fixture for replacing the tension porcelain bottles, but due to the special position and large stress of the end porcelain bottles of the UHV line, there is no reliable supporting point for the fixture near the end porcelain bottles of the wire, the special porcelain bottle fixture cannot be fixed, and in the current engineering practice, the method of replacing the end porcelain bottles after tightening the whole phase porcelain bottle string by using hand hoists is usually adopted, and the existing technology has the following shortcomings:

[0005] (1) More material and manpower are consumed, and the replacement period is long; 6 sets of 12t hand hoists, 12 GJ-180 temporary anchor ropes and φ24 steel wire rope sleeves, 1 set of working platform, 1 set of winch, 300m grinding rope and 5 tool trolleys are required for replacing the end porcelain bottles; at least 8 high-altitude workers and 5 ground auxiliary personnel are required; the 6 sets of hand hoists need to be synchronously and evenly stressed during the tightening of the porcelain bottle string, and after relaxation, the whole string of porcelain bottles need to be reliably fixed on the temporary anchor ropes at multiple points to avoid the porcelain bottles from falling; according to the previous construction experience, it takes 1.5 days to complete the replacement of a single end porcelain bottle.

[0006] (2) There are many high-altitude personnel, high labor intensity, long stress time of tools and high safety risk; according to the design drawing parameters, the operating tension of a single phase wire is up to 468kN, and the tension string self weight is 127kN; considering the wire over traction, the porcelain bottle string self weight and the 1.2 times coefficient of uneven stress of tools, the stress of the 6 sets of 12t hand hoists has reached the rated load. SUMMARY

[0007] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art, and to provide an auxiliary device for replacing the end porcelain bottles of a UHV tension tower and a method for using the same, which has low construction safety risk and cost and short construction period.

[0008] The technical scheme adopted by the present application to solve its technical problems is:

[0009] An auxiliary device for replacing end porcelain bottles of extra-high voltage strain tower, comprising M-arc connecting plates and parallel hanging plates, the M-arc connecting plates are symmetrically arranged in upper and lower positions, the M-arc connecting plates are provided with a plurality of bolt holes for connection, one end of the parallel hanging plate is fixed to the middle of the two M-arc connecting plates and is connected by high-strength bolts, the other end of the parallel hanging plate extends out of the M-arc connecting plate, and the extending end is provided with a construction hole; the parallel hanging plate is provided with four parallel hanging plates arranged in sequence at the inner arc end of the M-arc connecting plate.

[0010] Further, the M-arc connecting plates are installed on the upper and lower surfaces of the triangular connecting plate adjacent to the end porcelain bottle and are connected by high-strength bolts.

[0011] Further, the special porcelain bottle clamp uses a gear screw to connect the four parallel hanging plates through four high-strength bolts.

[0012] Further, the thickness of the M-arc connecting plate and the parallel hanging plate is 20-25 mm, and Q345 low-alloy high-strength steel is used.

[0013] A method for using an auxiliary device for replacing end porcelain bottles of extra-high voltage strain tower, the method comprising the following steps:

[0014] 1) According to the actual situation of the triangular connecting plate adjacent to the end porcelain bottle, the preliminary work for replacing the end porcelain bottle is arranged, including removing the grading ring and the shielding ring of the rectangular connecting plate on the triangular connecting plate.

[0015] 2) M-arc connecting plates are installed on the upper and lower surfaces of the triangular connecting plate, and are connected by two M38 high-strength bolts.

[0016] 3) Four M20 high-strength bolts are used to connect the top ends of the M-arc connecting plates into a whole, so that the upper and lower M-arc connecting plates are balanced in stress.

[0017] 4) Four parallel hanging plates are installed between the upper and lower M-arc connecting plates and are connected by four M20 high-strength bolts to form the support points of the special porcelain bottle clamp.

[0018] 5) The special porcelain bottle clamp is installed near the fourth porcelain bottle steel anchor of the end, and two sets of special clamps are required for two strings of porcelain bottles to ensure balanced stress of the auxiliary device.

[0019] 6) The special porcelain bottle clamp is connected to the four parallel hanging plates by a gear screw.

[0020] 7) The φ24 steel wire rope sleeve is connected on both sides of the end porcelain bottle to be replaced to provide double insurance and prevent accidents.

[0021] 8) Four high-altitude personnel slowly tighten the gear screw to ensure balanced stress of the two strings of porcelain bottles.

[0022] 9) After the porcelain bottle is loosened, one person holds the bottle and pulls out the pin. The broken bottle is then removed from the string of bottles and lowered to the ground using a rope. A good bottle is then placed in its place.

[0023] 10) Slowly loosen the gear screw, the porcelain insulator string will be under force, and remove the special clamps, auxiliary devices and the second safety rope for the porcelain insulator.

[0024] Using this invention, it is possible to effectively connect the special clamps for porcelain bottles with auxiliary devices, making installation and disassembly convenient, reducing construction safety risks and labor intensity, reducing manpower and material input, and shortening the construction cycle. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0026] Figure 2 for Figure 1 The schematic diagram of the M-shaped connecting plate in the embodiment shown;

[0027] Figure 3 for Figure 1 The schematic diagram of the parallel hanging plate in the embodiment shown;

[0028] Figure 4 This is an application effect diagram of an embodiment of the present invention;

[0029] Figure 5 for Figure 4 Enlarged schematic diagram of part A in the middle.

[0030] In the diagram: 1—M-shaped connecting plate, 2—parallel hanging plate, 3—gear screw, 4—special clamp for porcelain insulator, 5—triangular connecting plate, 6—end porcelain insulator, 7—equalizing ring, 8—shielding ring. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0032] See attached document Figures 1-5 This embodiment includes an M-shaped connecting plate 1 and a parallel hanging plate 2. There are two M-shaped connecting plates 1, which are arranged symmetrically from top to bottom. Each M-shaped connecting plate 1 has multiple bolt holes, and the two M-shaped connecting plates 1 arranged symmetrically from top to bottom are connected and fixed by four bolts.

[0033] One end of the parallel hanging plate 2 is fixed to the middle of two M-shaped arc-shaped connecting plates 1, and the other end extends out of the M-shaped arc-shaped connecting plate 1 by high-strength bolts. Four parallel hanging plates 2 are arranged in parallel to each other, and are arranged sequentially at the inner arc end of the M-shaped arc-shaped connecting plate 1. The extended end of the parallel hanging plate 2 is provided with a construction hole.

[0034] In this embodiment, the thickness of both the M-shaped connecting plate 1 and the parallel hanging plate 2 is 20-25mm, and they are made of Q345 low-alloy high-strength steel.

[0035] The method of using the auxiliary device for replacing the porcelain insulator at the end of the ultra-high voltage tension tower in this embodiment is as follows:

[0036] Figure 4 In the process, M-shaped connecting plates 1 are installed on the upper and lower surfaces of the triangular connecting plate 5 near the end of the porcelain bottle, and connected by two M38 high-strength bolts. Four parallel hanging plates 2 are installed between the upper and lower M-shaped connecting plates 1 and connected by four M20 high-strength bolts to form the support point of the porcelain bottle special clamp 4. The porcelain bottle special clamp 4 is installed at the steel anchor near the fourth porcelain bottle at the end. To ensure balanced force on the auxiliary device, two sets of special clamps 4 are required for the two strings of porcelain bottles. The porcelain bottle special clamp 4 is connected to the four parallel hanging plates 2 by a gear screw 3 and four M20 high-strength bolts.

[0037] Arrange the preliminary work for replacing the end porcelain insulator 6, such as removing the equalizing ring 7 and the shielding ring 8 when installing the M-shaped connecting plate 1.

[0038] Four high-altitude personnel slowly tightened the lead screw 3 to ensure that the two sets of porcelain insulators were subjected to balanced forces.

[0039] After the replaced porcelain bottle is loosened, one person holds the porcelain bottle and pulls out the porcelain bottle pin. The broken end of the porcelain bottle 6 is taken out from the porcelain bottle string and lowered to the ground using a tool rope. When replacing it, the new porcelain bottle is inserted along the porcelain bottle slot and the porcelain bottle pin is installed.

[0040] Slowly loosen the lead screw 3, the porcelain insulator string is under force, and remove the special clamp 4 for the porcelain insulator, the auxiliary device and the second safety rope.

[0041] This invention patent provides an auxiliary device for replacing porcelain insulators at the end of tension towers in ultra-high voltage direct current transmission lines and its usage method. It can effectively connect the special clamp 4 for porcelain insulators with the auxiliary device, making installation and disassembly convenient, reducing construction safety risks and labor intensity, reducing manpower and material input, and shortening the construction cycle.

[0042] Those skilled in the art can make various modifications and variations to this invention. If such modifications and variations are within the scope of the claims of this invention and their equivalents, then such modifications and variations are also within the protection scope of this invention.

[0043] The contents not described in detail in the specification are prior art known to those skilled in the art.

Claims

1. An auxiliary device for replacing porcelain insulators at the end of an ultra-high voltage tension tower, characterized in that, It includes an M-shaped connecting plate and a parallel hanging plate. The M-shaped connecting plate has two pieces arranged symmetrically at the top and bottom. The M-shaped connecting plate has multiple bolt holes for connection. One end of the parallel hanging plate is fixed to the middle of the two M-shaped connecting plates and connected by high-strength bolts. The other end extends out of the M-shaped connecting plate and has a construction hole. The parallel hanging plate has four pieces arranged in parallel to each other and is arranged sequentially at the inner arc end of the M-shaped connecting plate. It also includes the method for using porcelain insulators based on the auxiliary device for replacing porcelain insulators at the end of ultra-high voltage tension towers, with the specific steps as follows: S1: Arrange the preliminary work for replacing the end porcelain bottle according to the actual situation of the triangular connecting plate of the adjacent end porcelain bottle, including removing the equalizing ring on the triangular connecting plate and the shielding ring of the rectangular connecting plate. S2: Install M-shaped arc-shaped connecting plates on the upper and lower surfaces of the triangular connecting plate respectively, and connect them with two high-strength bolts; S3: Four high-strength bolts are used to connect the top of the M-shaped connecting plate into a whole, so that the upper and lower M-shaped connecting plates are subjected to force evenly. S4: Install four parallel hanging plates between the upper and lower two M-shaped connecting plates and connect them with four high-strength bolts to form the support points of the special clamp for porcelain bottles; S5: Install a special clamp for porcelain insulators at the steel anchor near the fourth porcelain insulator at the end. To ensure that the auxiliary device is subjected to balanced force, two sets of special clamps are required for the two strings of porcelain insulators. S6: The special clamp for porcelain bottles uses a gear screw and four parallel hanging plates for connection. S7: Use φ24 steel wire ropes to connect both sides of the porcelain insulator to be replaced as a double safety measure to prevent accidents; S8: Four high-altitude personnel slowly tighten the gear screw to ensure that the two sets of porcelain insulators are subjected to equal force. S9: After the replaced porcelain bottle is loosened, one person holds the porcelain bottle and pulls out the porcelain bottle pin, removes the broken porcelain bottle from the porcelain bottle string, uses a tool rope to lower it to the ground, and replaces it with a good porcelain bottle. S10: Slowly release the porcelain insulator clamps, the porcelain insulator string is under force, and remove the special clamps, auxiliary devices and the second safety rope for the porcelain insulators.

2. The auxiliary device for replacing porcelain insulators at the end of an ultra-high voltage tension tower according to claim 1, characterized in that, The M-shaped connecting plate is installed above and below the triangular connecting plate near the end of the porcelain bottle and is connected with high-strength bolts.

3. The auxiliary device for replacing porcelain insulators at the end of an ultra-high voltage tension tower according to claim 2, characterized in that, The special clamp for porcelain bottles uses a gear screw to connect the four parallel hanging plates with four high-strength bolts.

4. The auxiliary device for replacing porcelain insulators at the end of an ultra-high voltage tension tower according to any one of claims 1-3, characterized in that, The thickness of the M-shaped connecting plate and the parallel hanging plate is 20-25mm, and they are made of Q345 low-alloy high-strength steel.

5. The auxiliary device for replacing porcelain insulators at the end of an ultra-high voltage tension tower according to claim 1, characterized in that, In step S9, when replacing the porcelain bottle, insert the new porcelain bottle along the porcelain bottle slot and install the porcelain bottle pin.

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