CN105464456A - Method and lifting sling for assembling extra-high voltage transmission iron tower through helicopter - Google Patents

Abstract

The invention provides a method and lifting sling for assembling an extra-high voltage transmission iron tower through a helicopter. The method for assembling the extra-high voltage transmission iron tower through the helicopter comprises the following steps that 1, the helicopter hoists and fixes an iron tower leg section of the extra-high voltage transmission iron tower to a predetermined area; 2, the helicopter hoists and fixes an iron tower body of the extra-high voltage transmission iron tower to the iron tower leg section; 3, the helicopter hoists and fixes outside cross arms of the extra-high voltage transmission iron tower to the two sides of the iron tower body. According to the method and lifting sling for assembling the extra-high voltage transmission iron tower through the helicopter, the difficulties in a extra-high voltage construction peak season are solved, and the difficulties of difficult construction in special areas are further solved. By means of a success of assembling the extra-high voltage transmission iron tower through the helicopter, the construction technology of applying the helicopter to hoist an iron tower is pushed to a higher level, the range of types of hoisted towers is enlarged, and the demonstration effect and social influence both have great significance.

Description

Method and spreader for erecting UHV transmission towers by helicopter

technical field

The invention relates to the field of UHV power transmission equipment, in particular to a method for erecting UHV power transmission towers by helicopters, and a spreader used when erecting UHV power transmission towers by helicopters.

Background technique

Steel pipe towers for UHV lines above 1000kV have the characteristics of heavy tower sections and large geometric dimensions of frame structures. According to research data, at present, only Russia has engineering examples of using Mi-26 to hoist large-scale TV towers, and there is no information on hoisting UHV towers by other models. In the face of large-scale construction of UHV projects, helicopters have become an important choice to solve extreme construction problems in engineering construction, and to deal with outstanding problems such as environmental protection, construction safety, and construction schedule pressure. It is necessary to promote the deepening application of helicopters in UHV engineering construction.

Contents of the invention

In order to solve the problem of difficulty in erecting UHV transmission towers, the present invention provides a method and spreader for erecting UHV transmission towers by helicopter, which solves the peak of UHV construction It also solved the difficult construction problems in special areas.

The technical solution adopted by the present invention to solve its technical problems is:

A method for a helicopter to assemble an ultra-high voltage transmission tower, comprising the following steps:

Step 1. The helicopter lifts and fixes the tower leg section of the UHV transmission tower assembled by the helicopter to a predetermined location;

Step 2, the helicopter lifts and fixes the tower body of the UHV power transmission tower assembled by the helicopter on the leg section of the tower;

Step 3. Helicopter hoisting and fixing the outer cross arms of the UHV power transmission tower assembled by the helicopter to both sides of the tower body.

A sling used when a helicopter assembles an ultra-high voltage transmission tower, the sling is the sling used in the above step 1, and the sling includes ribs, a shoulder stretcher and a plurality of chain hoists sequentially connected from top to bottom .

The beneficial effect of the present invention is that the method for erecting UHV power transmission towers by helicopter and the spreader solve the problems faced in the peak period of UHV construction, and also solve the difficult problems of difficult construction in special locations. The success of the UHV power transmission tower erected by the helicopter pushes the construction technology of lifting the tower to a higher level and expands the range of hoisting towers. Its demonstration effect and social impact are of great significance.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide a further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the attached picture:

Figure 1 is the front view of the UHV transmission tower assembled by helicopter.

Fig. 2 is a schematic diagram of a complete tower leg hoisted by a helicopter.

Fig. 3 is a schematic diagram when the helicopter lifts the No. 23 tower body.

Figure 4 is a top view of the hanger.

Fig. 5 is a front view of the hook.

Fig. 6 is a front view of the first state when the helicopter is laterally docked and assembled with the outer cross arms.

Fig. 7 is a front view of the second state when the helicopter is laterally docked and assembled with the outer cross arm.

Fig. 8 is a front view of the third state when the helicopter is laterally docked and assembled with the outer cross arm.

Fig. 9 is a front view of the fourth state when the helicopter is laterally docked and assembled with the outer cross arm.

Fig. 10 is a front view of state five when the helicopter is laterally docked and assembled with the outer cross arm.

Reference signs in the figure: tower figures 5 and 5; tower figures 6 and 6; tower figures 7 and 7; tower figures 8 and 8; tower figures 9 and 9; tower figures 10 and 10; No. 11 tower body; No. 12, No. 12 tower body; No. 13, No. 13 tower body; No. 17, No. 17 tower body; No. 23, No. 23 tower body; No. 24, No. 24 tower body; 26, Tower leg section;

30. Spreader; 31. Rib plate; 32. Stretcher; 33. Chain hoist; 34. Eyebolt; 35. Pull wire;

40. Complete tower legs; 41. Tower legs; 42. Lower tower body unit; 43. Temporary stay wires;

50, outer cross arm; 51, hanger; 52, upper main material; 53, hook; 54, proximal cross arm; 55, upper steel pipe; 56, insertion rod;

detailed description

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

A method for a helicopter to assemble an ultra-high voltage transmission tower, comprising the following steps:

Step 1. The helicopter lifts and fixes the tower leg section of the UHV transmission tower assembled by the helicopter to a predetermined location;

Step 2, the helicopter lifts and fixes the tower body of the UHV power transmission tower assembled by the helicopter on the leg section of the tower;

Step 3, the helicopter is hoisting and fixing the outer cross arm of the UHV transmission tower assembled by the helicopter on both sides of the tower body;

The UHV transmission tower completed by the helicopter assembly is shown in Figure 1.

In this embodiment, the tower leg section of the UHV power transmission tower assembled by the helicopter contains four tower legs 41. In order to improve the hoisting efficiency, in step 1, the tower body section at the bottom of the tower body (that is, tower No. 24) Figure 24) is evenly divided into four lower tower body units 42 corresponding to four tower legs 41 one by one, so that four tower legs 41 and four lower tower body units 42 (i.e. 1/4 of No. 24 tower body section 24) ) are connected into four complete tower legs (40) in one-to-one correspondence, so that the helicopter can hoist a complete tower leg 40 at a predetermined location at a time, and complete the tower leg section 26 and the No. 24 tower body section by reciprocating the helicopter many times 24 hoisting. That is to say, when the helicopter finishes hoisting the tower leg section 26, it can simultaneously complete the hoisting of the tower leg section 26 and the lowermost tower body section in the tower body. Preferably, the size and shape of each complete tower leg 40 are exactly the same, and the weight of each complete tower leg 40 is 7 tons to 8 tons.

In this embodiment, in step 1, the helicopter hoisting and fixing a complete tower leg 40 to a predetermined location includes the following steps:

Step 1.1, the helicopter carries a complete tower leg 40 to the predetermined location;

Step 1.2, the helicopter carries the complete tower leg 40 to hover over the predetermined location, directs the helicopter to descend, and when the complete tower leg 40 descends to the predetermined location, releases the temporary stay wire bound on the complete tower leg 40 Open, pull the complete tower leg 40 to the prepared position for initial connection;

Step 1.3: Use push-pull or crowbar to align the eyelets of the anchor flange at the lower end of the complete tower leg 40 with the anchor bolts at the predetermined location, and the helicopter continues to descend, so that the complete tower leg 40 is set on the predetermined location. The outer block guide rail falls and penetrates the anchor bolt;

Step 1.4. After the complete tower leg 40 is in place, temporarily fix the complete tower leg 40, as shown in FIG. 2 .

Specifically, the helicopter hoisting and fixing a complete tower leg 40 to a predetermined location includes the following steps:

The helicopter flies to the top of the hanger in the material yard, slowly descends until the working hook is close to the ground, and the construction workers hang the hanger.

Step 1.1, command the helicopter to rise, and fly to the construction point (that is, the tower position) with the lifting parts;

Step 1.2. The helicopter carries the hanger to hover over the tower position, and the ground commands the helicopter to lower its height. When the hanger is close to the foundation, the construction personnel will untie the temporary stay wire tied to the hanger, and pull it to the ground to be ready. Good guy wires for preliminary connections;

Step 1.3. The construction personnel use push-pull or crowbar method (the crowbar can penetrate into the hole on the flange plate) to turn the main column of the tower leg, so that the eye holes of the flange plate of the foundation are aligned with the anchor bolts. The person in charge informs the helicopter to descend, and the hoisting section falls and penetrates the anchor bolts with the help of the outer guide rail set on the foundation;

Step 1.4, after the tower legs are in place, the construction workers quickly fix the temporary stay wire 43;

Step 1.5, the helicopter disengages the working hook and returns to the stockyard;

Step 1.6, repeat the above steps 1.1 to 1.5 four times, after completing the hoisting of 4 complete tower legs 40, the construction personnel climb the tower to complete the overall assembly work.

Notes for Step 1:

1. When the tower leg section is assembled in the stock yard, the site should be flat. The fulcrums of the tower section are leveled with instruments, and the ground assembly bolts are fastened intact to ensure that the deformation of the main column of the tower section is small and meets the regulations.

2. This plan gives the preliminary length of the lifting point rope, the actual length of the lifting point rope is determined by the true type test, and the construction operation instruction is executed according to the length determined by the test. In the true type test, the center of gravity is adjusted by the crane, the length of the point rope is determined, and the influence of the flange stiffener plate at the tower foot on the screwing in of the nut is checked, and the in-place test is carried out.

3. Temporary guy wires should be laid out and the pulleys should be connected to prepare for quick installation of the guy wires; manual coordination operations should be trained in advance to meet the completion of the tower leg hoisting operation within the specified time; after the 1/4 tower leg section is hoisted, Adjust the cable so that there is a gap of 100mm to 200mm at the central connection point to avoid the phenomenon of hanging and colliding with the lower section during installation.

4. When assembling in the stock yard, install guide rails on the upper end of the No. 24 tower body section 24. Bottom flange eyelets and corresponding anchor bolts should be clearly marked.

5. A floor plan should be drawn for the construction site of the tower, and the placement of supplementary materials and various machines and tools for manual installation should be arranged according to the drawing.

In this embodiment, the tower body of the UHV power transmission tower contains multiple tower body sections. In step 2, the helicopter lifts each tower body section sequentially according to the obedience from bottom to top. The helicopter includes the following when hoisting a tower body section step:

Step 2.1, the helicopter carries the tower body to hover over the predetermined location, and directs the helicopter to descend, so that the limit rope enclosure at the lower end of the tower body enters the upper guide rail of the part to be connected, and continues to fall so that the tower body passes through the guide rail Slide into the positioning pin on the flange plate of the part to be connected, so that the flange eyelets at the lower end of the tower body and the eyeholes on the flange plate of the part to be connected are accurately aligned, as shown in Figure 3.

Specifically, in step 2, the helicopter includes the following steps when hoisting a tower body section (only taking the installation of No. 23 tower body section 23 as an example):

The helicopter flies to the top of the hanger in the material yard, slowly descends until the working hook is close to the ground, and the construction workers hang the hanger;

Step 2.1. After the hoisting section flies from the material yard to the construction point and above the sky, it slowly descends to the sky above the tower leg section. The pilot and the ground command cooperate to order the limit rope enclosure of section 23 of tower 23 to enter section 24 of tower 24. The upper guide rail, and then the falling lifting section slides down through the guide rail to the positioning pin on the flange plate of No. 24 tower body section 24, so that the eye holes of the upper and lower flanges are accurately aligned;

Step 2.2, after the ground command lifting point rope falls off, the helicopter returns to the stockyard;

Step 2.3, complete the rods and bolts, measure the geometric dimensions of the upper flat opening, and check the deformation of the lifting section;

Step 2.4, measure the inclination of the whole tower, and tighten the bolts after correctness;

Step 2.5, remove auxiliary components and devices.

Step 2.6, repeat the above steps 2.1 to 2.5 several times until the overall assembly of the tower body is completed.

Notes for step 2:

1. After the lifting section is assembled in the stock yard, use a crane to lift it to check whether the dimensions of each part are accurate, and check that the deformation of the tower section after lifting meets the regulations.

2. After the tower section is hoisted automatically in place through the inner guide rail, the bolts are manually installed on the tower; the weight-reducing rods are installed in time, and the reinforcing rods are removed.

3. After the tower section is in place, if the bolt holes are not concentric on the flange plate, you can use the eye punch to penetrate into the bolt hole with better concentricity, and manually hammer with the hand hammer to make the tower section gradually return to its position. Insert bolts into the bolt holes, and finally pull out the eye punch, and replace the eye punch with bolts.

In this embodiment, the tower body of the UHV transmission tower contains multiple tower body sections, and the multiple tower body sections include No. 5 tower body section 5, No. 6 tower body section 6, and No. 7 tower body section 7 connected sequentially from top to bottom. , No. 8 tower body 8, No. 9 tower body 9, No. 10 tower body 10, No. 11 tower body 11, No. 12 tower body 12, No. 13 tower body 13, No. 17 tower body 17, No. 23 tower body 23 and 24 Tower No. 24, No. 24 Tower No. 24 is the lowest tower body; No. 5 Tower No. 5, No. 7 Tower No. 8, No. 9 Tower No. 9, No. 10 Tower No. 10, No. 11 Tower No. 11 , No. 12 tower body 12, No. 13 tower body 13, No. 17 tower body 17 and No. 23 tower body 23 adopt vertical assembly; No. 6 tower body 6, No. 8 tower body 8, complete tower leg 40 and the cross arm adopt Horizontal assembly.

Vertical assembly introduction: When the tower is assembled on the ground, the two main materials are hung on the skids, and the auxiliary materials are assembled so that the inner side of the tower faces upward. When lifting, use a crane to hoist the two pieces of tower materials assembled on the ground to the height of the tower section, and use the control rope to control the inclination angle of the tower pieces and make the lower end of the main material of the tower pieces coincide with the marking on the ground to adjust the inclination angle of the tower materials. Temporary ground anchors set the stay wires to stabilize the tower, and the crane slowly unhooks. Note that the tower should not leave the ground when lifting. Use the crane to assist in the installation of side auxiliary materials. After the tower section is assembled, measure the root opening, inclination and other related data.

Horizontal assembly introduction: Assemble one side of the tower on the ground, and use a crane to assist in the installation of the side inclined iron. After the inclined iron is installed, temporary stay wires need to be laid for stabilization to prevent the assembled tower section from tilting. The other piece of the opposite side tower that has been assembled on the ground is hoisted by a crane and connected to the assembled tower section on the ground. After the tower section is assembled, measure root opening, inclination and other relevant data.

In step 3 of this embodiment, the helicopter hoisting of the outer cross arm 50 includes the following steps:

Step 3.1, install the two hangers 51 one by one on the ends to be connected of the two upper main materials 52 of the outer cross arm 50, and install the two hooks 53 on the proximal cross arm outside the tower body in one-to-one correspondence The outer ends of the two upper steel pipes 55 of 54 are to be connected. The hanger 51 contains an insertion rod 56 arranged in the horizontal direction. The hook 53 contains a draw-in groove plate 57 and a V-shaped guide rail 58. The notch, the mounting position of the hanger 51 and the hook 53 need to satisfy that when the insertion rod 56 is inserted downward along the V-shaped guide rail 58 into the hook-shaped notch of the draw-in plate 57 and when the outer cross-arm 50 is rotated, the outer cross-arm 50 The to-be-connected ends of the two upper main materials 52 and the outer ends to be connected of the two upper steel pipes 55 of the proximal cross arm 54 can be connected correspondingly, as shown in FIGS. 4 and 5 ;

Step 3.2: Use a helicopter to suspend the horizontally placed outer cross arm 50 above the near side cross arm 54. When the helicopter is suspended, the ends to be connected of the two upper main materials 52 of the outer cross arm 50 are located at the outer cross arm 50 Above the ends to be connected of the two lower main materials, the outer cross arm 50 is lowered until the insertion rod 56 is inserted downward along the V-shaped guide rail 58 into the hook-shaped notch of the slot plate 57, as shown in Figure 6 and As shown in Figure 7;

Step 3.3, continue to lower the outer cross arm 50, and make the outer cross arm 50 rotate downward with the insertion rod 56 as the axis, until the two ends to be connected of the two lower main materials of the outer cross arm 50 and the two ends of the proximal cross arm 54 The parts to be connected at the outer ends of the lower steel pipes are correspondingly connected, and at the same time, the parts to be connected at the outer ends of the two upper main materials 52 of the outer cross arm 50 and the outer ends of the two upper steel pipes 55 of the proximal cross arm 54 are also connected correspondingly, as shown in Figure 8 As shown in FIG. 10 , the outer cross arm 50 and the proximal cross arm 54 are fixed by bolt connection.

Step 3.4, repeat steps 3.1 to 3.3 for several times until the assembly of the outer cross arm 50 is completed.

The following introduces a kind of spreader used when a helicopter assembles an ultra-high voltage transmission tower. The spreader is the spreader 30 used in step 1, that is, the helicopter lifts the tower leg through the spreader 30. The ribs 31, the shoulder stretcher 32 and a plurality of chain hoists 33 connected in sequence downwards, of course, the helicopter can hoist the tower body section and the outer cross arm 50 through the spreader 30 .

In this embodiment, two eyebolts 34 are provided on the rib 31 , and the ring heads of the eyebolts 34 face upward. Rib 31 is circular. Along the circumferential direction of the rib plate 31 , a plurality of through holes are provided between the inner circle and the outer circle of the rib plate 31 , and the axes of the through holes are parallel to the axis of the rib plate 31 . The eyebolt 34 is connected and fixed with the rib plate 31 through the through hole. On the surface of the rib 31 , a reinforcing plate is arranged between two adjacent through holes, and the reinforcing plate is arranged along the radial direction of the rib 31 . The outer diameter of the rib plate 31 is about 1000mm, the inner diameter of the rib plate 31 is about 840mm, and the weight of the rib plate 31 is about 100kg. The effect of the rib plate 31 is to prevent torsion.

In this embodiment, the ribs 31 and the pole 32 are connected by four stay wires 35 . The rib 31 is connected to the helicopter through two slings, and the rated load of the stay wire 35 is 80kN-120kN. The shoulder stretcher 32 is rectangular, and the shoulder stretcher 32 is formed by connecting four beams and two oblique beams. The lower part of the shoulder stretcher 32 is connected with four chain hoists 33, and the rated load of the chain hoists 33 is 25kN～40kN. The shoulder stretcher 32 is connected with the suspended part through a chain hoist 33 .

The above is only a specific embodiment of the present invention, and cannot limit the scope of the invention, so the replacement of its equivalent components, or the equivalent changes and modifications made according to the patent protection scope of the present invention, should still fall within the scope of this patent. category. In addition, the technical features and technical features, technical features and technical solutions, and technical solutions and technical solutions in the present invention can be used in free combination.

Claims (10)

1. go straight up to the method that unit founds UHV transmission steel tower, it is characterized in that, described in go straight up to the method that unit founds UHV transmission steel tower and comprise the following steps:

Step 1, helicopter this is gone straight up to unit stand UHV transmission steel tower tower leg section lifting be fixed on the predetermined area;

Step 2, helicopter this is gone straight up to unit stand UHV transmission steel tower tower body lifting be fixed in this tower leg section;

This is gone straight up to the both sides that this tower body is fixed in outside cross-arm lifting that unit founds UHV transmission steel tower by step 3, helicopter.

2. according to claim 1ly go straight up to the method that unit founds UHV transmission steel tower, it is characterized in that, in step 1, this helicopter lifts described tower leg by suspender (30), and this suspender (30) comprises the gusset (31), shoulder pole frame (32) and the multiple Chain block (33) that connect successively from the top down.

3. according to claim 1ly go straight up to the method that unit founds UHV transmission steel tower, it is characterized in that, this is gone straight up to the tower leg section that unit founds UHV transmission steel tower and contains four tower legs (41), in step 1, tower body section bottom in this tower body is divided into and four tower legs (41), four lower tower body unit (42) one to one, four tower legs (41) are made to connect one to one into four complete tower legs (40) with four lower tower body unit (42), complete tower leg (40) lifting is fixed on the predetermined area by this helicopter at every turn, by repeatedly back and forth this helicopter complete the lifting of this tower leg section.

4. according to claim 3ly go straight up to the method that unit founds UHV transmission steel tower, it is characterized in that, the size and shape of each complete tower leg (40) is identical, and the weight of each complete tower leg (40) is 7 tons ~ 8 tons.

5. according to claim 3ly go straight up to the method that unit founds UHV transmission steel tower, it is characterized in that, in step 1, complete tower leg (40) lifting is fixed on the predetermined area and is comprised the following steps by this helicopter:

Step 1.1, this helicopter are taken a complete tower leg (40) and are flown to this predetermined area;

Step 1.2, this helicopter are taken this complete tower leg (40) and are hovered to this overhead, predetermined area, this helicopter is commanded to decline, when this complete tower leg (40) drops to this predetermined area, the temporary guy of colligation on this complete tower leg (40) is untied, this complete tower leg (40) is pulled to ready position and tentatively connects;

Step 1.3, push-and-pull or crowbar mode is adopted to make the lower margin flange eyelet of complete tower leg (40) lower end aim at stone bolt on this predetermined area, this helicopter continues to decline, make complete tower leg (40) by the outer gear guide rail that this predetermined area is arranged, fall to penetrating this stone bolt;

Step 1.4, complete tower leg (40) in place safe after, carry out temporary fixed to complete tower leg (40).

6. according to claim 1ly go straight up to the method that unit founds UHV transmission steel tower, it is characterized in that, the tower body of this UHV transmission steel tower contains multiple tower body section, in step 2, this helicopter lifts each tower body section successively according to being obedient to from bottom to top, and this helicopter comprises the following steps when a lifting tower body section:

Step 2.1, this helicopter are taken this tower body section and are hovered to this overhead, predetermined area, this helicopter is commanded to decline, make the limit rope of the lower end of this tower body section enclose frame and enter position to be connected upper rall, continue to fall to making this tower body section through this guide rail landing in the alignment pin on the flange at this position to be connected, make the eyelet accurate contraposition on the flange eyelet of the lower end of this tower body section and the flange at this position to be connected.

7. according to claim 3ly go straight up to the method that unit founds UHV transmission steel tower, it is characterized in that, the tower body of this UHV transmission steel tower contains multiple tower body section, the plurality of tower body section comprises No. 5 tower body sections (5) connected successively from the top down, No. 6 tower body sections (6), No. 7 tower body sections (7), No. 8 tower body sections (8), No. 9 tower body sections (9), No. 10 tower body sections (10), No. 11 tower body sections (11), No. 12 tower body sections (12), No. 13 tower body sections (13), No. 17 tower body sections (17), No. 23 tower body sections (23) and No. 24 tower body sections (24), No. 24 tower body sections (24) are tower body section bottom in this tower body,

No. 5 tower body sections (5), No. 7 tower body sections (8), No. 9 tower body sections (9), No. 10 tower body sections (10), No. 11 tower body sections (11), No. 12 tower body sections (12), No. 13 tower body sections (13), No. 17 tower body sections (17) and No. 23 tower body sections (23) adopt vertical assembled;

No. 6 tower body sections (6), No. 8 tower body sections (8), complete tower leg (40) and this cross-arms adopt horizontal assembling.

8. according to claim 1ly go straight up to the method that unit founds UHV transmission steel tower, it is characterized in that, in step 3, described in helicopter, outside cross-arm (50) comprises lower step:

Step 3.1, two hangers (51) are arranged on one to one the end to be connected of two upper main materials (52) of cross-arm outside this (50), two hooks (53) are arranged on one to one the position to be connected, outer end of two upper steel pipes (55) of the nearside cross-arm (54) outside tower body, hanger (51) is containing the insertion rod (56) arranged in the horizontal direction, hook (53) is containing clamping groove plate (57) and V-way (58), clamping groove plate (57) upper containing opening towards hook-type notch, the installation site demand fulfillment of hanger (51) and hook (53) is when insertion rod (56) to be inserted into downwards in the hook-type notch of clamping groove plate (57) along V-way (58) and to rotate cross-arm outside this (50), outside this, the end to be connected of two of cross-arm (50) upper main materials (52) can correspondingly connect with the position to be connected, outer end of two upper steel pipes (55) of nearside cross-arm (54),

Step 3.2, with helicopter, the outside cross-arm (50) of traverse is suspended to the top of nearside cross-arm (54), this helicopter is when suspending in midair, the end to be connected of the upper main materials (52) of outside cross-arm (50) two is positioned at the top of the end to be connected of main material under two of outside cross-arm (50), cross-arm outside this (50) is made to decline again, until insertion rod (56) is inserted in the hook-type notch of clamping groove plate (57) downwards along V-way (58) downwards;

Step 3.3, continue to transfer cross-arm outside this (50), make outside cross-arm (50) with insertion rod (56) for axle rotates, until the end to be connected of main material and the position to be connected, outer end of two lower steel pipes of nearside cross-arm (54) is corresponding connects under two of outside cross-arm (50), the end to be connected of two of outside cross-arm (50) upper main materials (52) and two of nearside cross-arm (54) go up that the position to be connected, outer end of steel pipes (55) is also corresponding to be connected simultaneously.

9. go straight up to the suspender used when unit founds UHV transmission steel tower for one kind, it is characterized in that, this suspender is the suspender (30) used in the step 1 of claim 1, and this suspender (30) comprises the gusset (31), shoulder pole frame (32) and the multiple Chain block (33) that connect successively from the top down.

10. according to claim 9ly go straight up to the suspender used when unit founds UHV transmission steel tower, it is characterized in that, gusset (31) is provided with two lifting bolts (34), connected by four bracing wires (35) between gusset (31) and shoulder pole frame (32), shoulder pole frame (32) is rectangular, and the bottom of shoulder pole frame (32) is connected with four Chain blocks (33).