CN210188135U

CN210188135U - Section bending machine for transmission tower

Info

Publication number: CN210188135U
Application number: CN201920971909.XU
Authority: CN
Inventors: Zhenghong Gong; 龚正洪; Haiying Dai; 戴海英
Original assignee: JIANGSU XIANGYU POWER EQUIPMENT MANUFACTURING Co Ltd
Current assignee: JIANGSU XIANGYU POWER EQUIPMENT MANUFACTURING Co Ltd
Priority date: 2019-06-26
Filing date: 2019-06-26
Publication date: 2020-03-27
Anticipated expiration: 2029-06-26

Abstract

The utility model discloses a section bar bending machine for steel pylons, be fixed with the roof-rack directly over the base, swing joint has horizontal compression bar from top to bottom between roof-rack and the base, the top of base, the both sides that are located horizontal compression bar are symmetrical respectively and are equipped with the slide, the slide top, rotate towards one side of horizontal compression bar and be connected with the commentaries on classics roller, the top surface of roof-rack has the horizontal track of a set of parallel, the slide slides along horizontal track, it is connected with horizontal lead screw to rotate along horizontal orbital direction in the base, horizontal lead screw surface, the screw lead that is located horizontal compression bar both sides equals, opposite direction, the slide passes through the nut pair and is connected with horizontal lead screw's corresponding side. According to the structure, the utility model discloses a section bar bending machine for steel pylons, change roller itself and follow the both sides of section bar department of buckling and rotate owing to buckling deformation, the effect through changeing the roller has changed the whole frock seat that needs to place the work piece before and overturns to make the effort of horizontal compression bar all be used for the bending of section bar as far as possible, reduce the energy consumption.

Description

Section bending machine for transmission tower

Technical Field

The utility model relates to a steel pylons is with technical field of section bar bending apparatus, concretely relates to steel pylons is with section bar bending machine.

Background

The transmission tower is a supporting point of an overhead line, a single-loop transmission tower is erected on the transmission tower, and a double-loop transmission tower is erected on the transmission tower. The single loop is a loop with a load provided with a power supply; the double-loop is a loop with 2 power supplies in a load. Generally, enterprises or regional important substations with high requirements on power supply reliability adopt double-circuit power supply, so that one power supply can be protected from power failure due to reasons, and the other power supply can continue to supply power. But the medium and small users with low requirement on power supply reliability usually adopt single power supply.

Power transmission towers are very common in power transmission, and are formed by splicing sectional materials, wherein some sectional materials are bent and formed by bending the sectional materials through a bending machine.

The applicant has filed a number of patents on bending apparatus. But among the bending equipment before, the work piece both ends need place on the frock seat, then along with the bending of section bar, the section bar both ends drive the frock seat and rotate around the department of bending, because frock seat structure itself is great, weight is also great, so its rotation need can go on under the effect of certain moment of torsion, this just needs the bending device to provide extra effort and makes the frock seat rotate, leads to the energy consumption great. In addition, the workpiece needs to be heated to a red hot state during heating and bending, and the bent workpiece still needs to be cooled, so that a large amount of energy used for heating the bow and the arrow is completely wasted, and the production energy consumption is high. In addition, when the prior patent is used for bending workpieces of different types, the operation of replacement is complicated, the heating device needs to be cooled, and the waiting time is long and has certain dangerousness.

Disclosure of Invention

The utility model aims to provide a: the defects of the prior art are overcome, the rotating roller rotates along with two sides of the bending position of the section due to bending deformation, the whole tool seat for placing a workpiece is turned over before is changed through the action of the rotating roller, so that the acting force of the horizontal compression bar is fully used for bending the section as much as possible, and the energy consumption is reduced; through the action of the limiting notch and the U-shaped plate, the sectional material can be limited on the rotating roller, so that the bending position of the sectional material is accurate; under the action of the positioning beads of the U-shaped plate, the section can be positioned more accurately, and the section can move relative to the rotating roller in the bending process conveniently; through the action of the rollers of the U-shaped plate, the friction force between the profile and the U-shaped plate is reduced, and the movement between the profile and the U-shaped plate is further facilitated; through the action of the U-shaped plates, the section bars can be accurately positioned, and different U-shaped plates can be replaced according to different section bars, so that the applicability of the bending machine is improved; the puller bolt is positioned on one side of the rotary roller, which is back to the horizontal compression bar, so that the puller bolt is convenient to screw and is prevented from interfering with the bending of the section; the U-shaped plate is pushed to the horizontal compression bar by the jacking bolt, so that the distance between the U-shaped plate and the horizontal compression bar is reduced, and the bending machine can be suitable for bending shorter sections; by the special structure of the screw rod, the painting on two sides of the horizontal pressure rod can synchronously and reversely move; through the plurality of cylindrical cambered surface structures with different diameters arranged on the horizontal compression bar, the bending machine can bend the section into different radiuses, and the applicability of the bending machine is improved; through the action of the positioning convex strips, the cylindrical cambered surface at the bottom of the horizontal pressure rod can be accurately positioned, and the bending effect is ensured; through the action of the limiting roller, the shapes of the profiles on two sides of the bending part of the profile can be ensured, and the friction force between the profiles and the limiting roller can be reduced; through the spacing groove between two adjacent cylinder cambered surfaces on the horizontal compression bar, the profile is prevented from being in contact with the adjacent cylinder cambered surfaces when being bent, so that abrasion is avoided.

The utility model adopts the technical proposal that:

a section bending machine for a power transmission tower comprises a base, wherein an upper frame is fixed right above the base through a support column, a horizontal compression rod is movably connected between the upper frame and the base from top to bottom, sliding seats are symmetrically arranged on the top of the base and on two sides of the horizontal compression rod respectively, a rotating roller is rotatably connected on one side of the top of each sliding seat and facing the horizontal compression rod and is parallel to the horizontal compression rod, a group of parallel horizontal rails are fixedly connected on the top surface of the upper frame, the horizontal rails are perpendicular to the horizontal compression rod, the sliding seats slide along the horizontal rails, a horizontal lead screw is rotatably connected in the base along the direction of the horizontal rails, the thread leads on the surface of the horizontal lead screw and on the two sides of the horizontal compression rod are equal and opposite in direction, the sliding seats are respectively in transmission connection with corresponding sides of the horizontal lead screw through nut pairs, and one end of the, the horizontal compression bar moves up and down through a hydraulic piston, and the hydraulic piston is fixed on the top frame.

The utility model discloses the further improvement scheme is, the direction of changeing the roller along the perpendicular to in lateral wall one side of changeing the roller is equipped with spacing notch, the spacing notch internal fixation has "U" template, the bottom plate of "U" template and the tank bottom contact of spacing notch, the curb plate of "U" template and the cell wall laminating of spacing notch, evenly distributed has many rollers that are parallel to each other on the bottom plate in "U" template, the roller is parallel with the horizontal compression bar, the roller rotates around respective axle center respectively and connects in "U" template, distance between the both sides board of "U" template equals with the width of section bar for transmission tower.

The utility model discloses further improve the scheme and be, spacing notch is equipped with a plurality ofly, follows the axis of changeing the roller respectively and evenly distributes in proper order.

The utility model discloses further improve the scheme and be, the both ends of changeing the roller are rotated with the slide through the bracing piece respectively and are connected, the bracing piece is fixed in the slide, change the roller and rotate to be connected in the bracing piece.

The utility model discloses a further improvement is, the lateral wall symmetry in "U" template is equipped with the location pearl, the location pearl is along the spacing groove removal of locating "U" template lateral wall, the diameter and the location pearl of spacing groove match, through the spring that is equipped with pre-compaction stress between the tank bottom of location pearl and spacing groove, the coaxial retaining ring that is fixed with in groove of spacing groove, the internal diameter of retaining ring is less than the diameter of location pearl.

The utility model discloses a further improvement scheme is, the line of location pearl and the axle center of commentaries on classics roller is perpendicular with the tank bottom of spacing notch.

The utility model discloses a further improvement scheme is, the distance between location pearl and the roller is less than the thickness of section bar for steel pylons.

The utility model discloses further improve the scheme and be, the tank bottom of spacing notch is less than and follows at the bottom of the notch corresponding to position department between "U" template both sides board, highly be less than or equal to the bottom plate top surface height of "U" template at the bottom of the notch along, "U" template is fixed in spacing notch through the tight bolt in top.

The utility model discloses a further improvement is, the spacing notch is kept away from at the bottom of the notch of horizontal depression bar one side along being equipped with the screw hole that matches with the tight bolt in top, the tight bolt in top passes at the bottom of the notch of screw hole with "U" template and opposite side along the top tightly fixed.

The utility model discloses a further improvement is, the both ends of horizontal compression bar are fixed in hydraulic piston's tailpiece of the piston rod portion, horizontal compression bar's lateral wall surface has set gradually the cylinder cambered surface of a plurality of different diameters, the piston rod is equipped with the spacing roller of one row of parallel towards the bilateral symmetry of commentaries on classics roller, the both ends of spacing roller are rotated respectively and are connected in the link, the link is fixed in the piston rod, spacing roller is tangent to the public tangent line of commentaries on classics roller one side and the cylinder cambered surface of horizontal compression bar bottom.

The utility model discloses further improve the scheme and be, the pivot that establishes with the axle center at spacing roller both ends rotates with the link to be connected.

The utility model discloses a further improvement is, the piston rod is equipped with the cylinder arc concave surface towards the one end of horizontal depression bar, the cylinder arc concave surface is separated from the cylinder cambered surface that is located the horizontal depression bar top.

The utility model discloses further improve the scheme and be, horizontal depression bar's surface, be located and be equipped with the spacer groove along the axis direction between two adjacent cylinder cambered surfaces.

The utility model discloses a further improvement is, it is fixed with the piston rod that the connecting rod is passed through at the both ends of horizontal depression bar, the connecting rod is equipped with the through-hole, the horizontal depression bar tip is equipped with the threaded rod parallel with horizontal depression bar axle center, the threaded rod external diameter matches with the through-hole to the both sides that the threaded rod is located the connecting rod are equipped with the nut of matching respectively, and it is fixed with horizontal depression bar and connecting rod through the nut.

The utility model discloses a further improvement is, the connecting rod is equipped with the constant head tank respectively towards a side end face of horizontal depression bar on, be located the upper and lower side of through-hole, horizontal depression bar is equipped with the location sand grip that corresponds respectively with every cylinder cambered surface on towards the terminal surface of connecting rod respectively, the structure and the constant head tank matching of location sand grip, when a certain cylinder cambered surface is located horizontal depression bar under, location sand grip and constant head tank accordant connection that this cylinder cambered surface corresponds.

The utility model discloses a further improvement scheme is, driving motor is servo motor.

The beneficial effects of the utility model reside in that:

first, the utility model discloses a section bar bending machine for steel pylons, change roller itself and follow the both sides of section bar department of buckling and rotate owing to buckling deformation, the effect through changeing the roller has changed the whole frock seat that needs to place the work piece before and overturns to make the effort of horizontal compression bar all be used for the bending of section bar as far as possible, reduce the energy consumption.

Second, the utility model discloses a section bar bending machine for steel pylons through the effect of spacing notch and "U" shaped plate to can make the section bar spacing on changeing the roller, thereby guarantee that the position of buckling of section bar is accurate.

Third, the utility model discloses a section bar bending machine for steel pylons, the effect through the location pearl of "U" shaped plate not only can make the location of section bar more accurate, the section bar of also being convenient for takes place relative movement between the in-process of bending and the live-rollers moreover.

Fourth, the utility model discloses a section bar bending machine for steel pylons through the effect of the roller of "U" shaped plate to reduce the frictional force between section bar and the "U" shaped plate, the removal between further the section bar of being convenient for and "U" shaped plate.

Fifth, the utility model discloses a section bar bending machine for steel pylons through the effect of "U" shaped plate, not only can carry out the accurate positioning to the section bar, but also can change different "U" shaped plates according to the section bar of difference to improve the suitability of bending machine.

Sixth, the utility model discloses a section bar bending machine for transmission tower, puller bolt is located the roller and backs to one side of horizontal depression bar, not only is convenient for twist of puller bolt, also avoids puller bolt to interfere the bending of section bar; and the U-shaped plate is pushed to the horizontal compression bar by the puller bolt, so that the distance between the U-shaped plate and the horizontal compression bar is reduced, and the bending machine can be suitable for bending shorter sections.

Seventh, the utility model discloses a section bar bending machine for steel pylons passes through the special construction of lead screw to can realize the synchronous reverse movement of drawing of horizontal depression bar both sides.

Eighth, the utility model discloses a section bar bending machine for steel pylons, the cylinder cambered surface structure of a plurality of different diameters that establish through the horizontal compression pole to can make the bending machine can buckle out different radiuses with the section bar, improve the suitability of bending machine.

Ninth, the utility model discloses a section bar bending machine for steel pylons through the effect of location sand grip, can guarantee that the cylinder cambered surface of horizontal depression bar bottom fixes a position accurately, has guaranteed the effect of buckling.

Tenth, the utility model discloses a section bar bending machine for steel pylons through the effect of spacing roller, not only can guarantee the section bar shape of section bar department of buckling both sides, but also can reduce the frictional force with the section bar.

Eleventh, the utility model discloses a section bar bending machine for steel pylons through the space groove between two adjacent cylinder cambered surfaces on the horizontal compression pole, prevents that the section bar from causing wearing and tearing with adjacent cylinder cambered surface contact when buckling.

Description of the drawings:

FIG. 1 is a schematic side view of the present application.

Fig. 2 is a front view of the present application with the front support post removed.

Fig. 3 is a front enlarged view of the present application at the position of the horizontal strut.

Fig. 4 is an enlarged schematic top view of the roller of the present application.

Fig. 5 is an enlarged top view of the roller at the position of the limit notch.

The specific implementation mode is as follows:

as can be known from the figures 1 to 5, the utility model relates to a section bending machine for a power transmission tower, which comprises a base 1, an upper frame 2 is fixed right above the base 1 through a support column 10, a horizontal compression bar 3 is movably connected between the upper frame 2 and the base 1 from top to bottom, two sides of the top of the base 1 and the horizontal compression bar 3 are respectively and symmetrically provided with a slide seat 5, one side of the top of the slide seat 5 facing the horizontal compression bar 3 is rotatably connected with a rotary roller 8, the rotary roller 8 is parallel to the horizontal compression bar 3, the top surface of the upper frame 2 is fixedly connected with a group of parallel horizontal rails 6, the horizontal rails 6 are perpendicular to the horizontal compression bar 3, the slide seat 5 slides along the horizontal rails 6, the horizontal lead screw is rotatably connected in the base 1 along the direction of the horizontal rails 6, the surface of the horizontal lead screw and the screw threads on two sides of the horizontal compression bar 3, the sliding base 5 is in transmission connection with the corresponding side of the horizontal screw rod through a nut pair, one end of the horizontal screw rod provides driving force through a driving motor 7, the horizontal pressing rod 3 moves up and down through a hydraulic piston 4, and the hydraulic piston 4 is fixed on the top frame 2.

The utility model discloses a steel wire rope drawing machine, including the roller 8, the lateral wall one side of changeing the roller is equipped with spacing notch 9 along the direction of perpendicular to commentaries on classics roller 8, spacing notch 9 internal fixation has "U" template 12, "U" template 12's bottom plate and the tank bottom contact of spacing notch 9, "U" template 12's curb plate and the laminating of spacing notch 9's cell wall, evenly distributed has many rollers 23 that are parallel to each other on the bottom plate in "U" template 12, roller 23 is parallel with horizontal depression bar 3, roller 23 rotates around respective axle center and connects in "U" template 12 respectively, the distance between the both sides board of "U" template 12 equals with the width of section bar for transmission tower.

The limiting notches 9 are arranged in a plurality and are respectively and uniformly distributed along the axis of the rotary roller 8 in sequence.

The two ends of the rotating roller 8 are respectively connected with the sliding seat 5 in a rotating mode through a supporting rod 16, the supporting rod 16 is fixed on the sliding seat 5, and the rotating roller 8 is connected to the supporting rod 16 in a rotating mode.

The lateral wall symmetry in "U" template 12 is equipped with location pearl 24, location pearl 24 removes along the spacing groove of locating "U" template 12 lateral wall, the diameter and the location pearl 24 of spacing groove match, through the spring that is equipped with pre-compressive stress between the tank bottom of location pearl 24 and spacing groove, the coaxial retaining ring that is fixed with in groove of spacing groove, the internal diameter of retaining ring is less than the diameter of location pearl 24.

The connecting line of the positioning bead 24 and the axle center of the rotary roller 8 is vertical to the groove bottom of the limiting notch 9.

The distance between the positioning beads 24 and the rollers 23 is smaller than the thickness of the section bar for the power transmission tower.

The groove bottom of the limiting groove opening 9 is lower than the groove opening bottom edge at the position corresponding to the position between the two side plates of the U-shaped plate 12, the height of the groove opening bottom edge is lower than or equal to the height of the top surface of the bottom plate of the U-shaped plate 12, and the U-shaped plate 12 is fixed in the limiting groove opening 9 through a puller bolt 13.

The bottom edge of the notch on one side of the limiting notch 9, which is far away from the horizontal compression bar 3, is provided with a threaded hole matched with a puller bolt 13, and the puller bolt 13 penetrates through the threaded hole to tightly fix the U-shaped plate 12 and the notch on the other side.

The both ends of horizontal depression bar 3 are fixed in the 14 tip of piston rod of hydraulic piston 4, the lateral wall surface of horizontal depression bar 3 has set gradually the cylinder cambered surface 20 of a plurality of different diameters, piston rod 14 is equipped with one row of parallel spacing roller 11 towards the bilateral symmetry of commentaries on classics roller 8, the both ends of spacing roller 11 are rotated respectively and are connected in link 18, link 18 is fixed in piston rod 14, spacing roller 11 is tangent with the cylinder cambered surface 20 of horizontal depression bar 3 bottom towards the common tangent line of commentaries on classics roller 8 one side.

And rotating shafts 22 arranged at the two ends of the limiting roller 11 and coaxially are rotatably connected with the connecting frame 18.

One end of the piston rod 14 facing the horizontal compression bar 3 is provided with a cylindrical arc concave surface 21, and the cylindrical arc concave surface 21 is separated from a cylindrical arc surface 20 positioned at the top of the horizontal compression bar 3.

And a spacing groove is formed on the surface of the horizontal compression bar 3 between two adjacent cylindrical cambered surfaces 20 along the axis direction.

The both ends of horizontal depression bar 3 are fixed with piston rod 14 through connecting rod 17, connecting rod 17 is equipped with the through-hole, horizontal depression bar 3 tip is equipped with the threaded rod 19 parallel with horizontal depression bar 3 axle center, 19 external diameters of threaded rod match with the through-hole to threaded rod 19 is located the both sides of connecting rod 17 and is equipped with the nut that matches respectively, and it is fixed with connecting rod 17 with horizontal depression bar 3 through the nut.

Connecting rod 17 is equipped with the constant head tank respectively towards on the terminal surface of one side of horizontal depression bar 3, the upper and lower side that is located the through-hole, horizontal depression bar 3 is equipped with the location sand grip 15 that corresponds respectively with every cylinder cambered surface 20 on towards the terminal surface of connecting rod 17, the structure and the constant head tank matching of location sand grip 15, when a certain cylinder cambered surface 20 is located horizontal depression bar 3 under, the location sand grip 15 and the constant head tank accordant connection that this cylinder cambered surface 20 corresponds.

The driving motor 7 is a servo motor.

When the device is used, the horizontal compression bar 3 and the connecting rod 17 are loosened through the nut, the appropriate cylindrical cambered surface 20 is selected to be positioned at the bottom of the horizontal compression bar 3 according to the radius of a bending part to be formed by the section bar for the power transmission tower, then the horizontal compression bar 3 and the connecting rod 17 are fixed through the nut, the appropriate limiting rollers 11 are fixed on two sides of the piston rod 14 facing the rotating rollers 8, and the common tangent line of the limiting rollers 11 facing the corresponding side rotating rollers 8 is tangent to the cylindrical cambered surface 20 positioned at the bottom of the horizontal compression bar 3; then, according to the length of the section bar for the power transmission iron tower, the distance between the sliding seats 5 is adjusted through the driving motor 7, so that the distance between the axes of the rotating rollers 8 is equal to the length of the section bar for the power transmission iron tower; the two ends of the section bar for the power transmission iron tower are respectively placed in the U-shaped plates 12, and the two ends of the section bar for the power transmission iron tower are respectively positioned through the positioning beads 24 under the action of the positioning beads 24; and then starting the hydraulic piston 4 to enable the horizontal compression rod 3 to move downwards, when the horizontal compression rod 3 moves downwards to be in contact with the section bar for the power transmission tower, starting the driving motor 7, enabling the sliding seat 5 to move towards one side of the horizontal compression rod 3 along the horizontal rail 6, enabling the U-shaped plate 12 to be in contact with the section bar for the power transmission tower all the time by using the driving motor 7 as a servo motor until the horizontal compression rod 3 moves downwards to the maximum stroke position, stopping the driving motor 7 from rotating, enabling the horizontal compression rod 3 to move upwards to the maximum stroke position through the hydraulic piston 4, taking out the section bar for the power transmission tower after being bent by an operator, and finally starting the driving motor 7 to enable the sliding seat 5 to return to the initial position along the horizontal rail 6.

Claims

1. The utility model provides a section bar bending machine for steel pylons which characterized in that: including base (1), be fixed with roof-rack (2) through support column (10) directly over base (1), swing joint has horizontal depression bar (3) about between roof-rack (2) and base (1), the top of base (1), the both sides that are located horizontal depression bar (3) are symmetry respectively and are equipped with slide (5), slide (5) top, rotate towards one side of horizontal depression bar (3) and be connected with and change roller (8), it is parallel with horizontal depression bar (3) to change roller (8), the top surface fixedly connected with horizontal track (6) of a set of parallel of roof-rack (2), horizontal track (6) are perpendicular with horizontal depression bar (3), slide (5) slide along horizontal track (6), the direction rotation along horizontal track (6) in base (1) is connected with horizontal lead screw, horizontal lead screw surface, the screw lead that is located horizontal depression bar (3) both sides equal, The direction is opposite, the slide (5) is in transmission connection with the corresponding side of the horizontal screw rod through the nut pair, one end of the horizontal screw rod provides driving force through the driving motor (7), the horizontal pressing rod (3) moves up and down through the hydraulic piston (4), and the hydraulic piston (4) is fixed on the top frame (2).

2. The section bender for the power transmission towers according to claim 1, wherein: the utility model discloses a steel wire rope drawing machine, including the roller, the lateral wall of roller (8) is changeed the direction of roller (8) along the perpendicular to and is equipped with spacing notch (9) on one side, spacing notch (9) internal fixation has "U" template (12), the bottom plate of "U" template (12) and the tank bottom contact of spacing notch (9), the curb plate of "U" template (12) and the cell wall laminating of spacing notch (9), evenly distributed has many rollers (23) that are parallel to each other on the bottom plate in "U" template (12), roller (23) are parallel with horizontal compression bar (3), roller (23) rotate around respective axle center and connect in "U" template (12) respectively, the distance between the both sides board of "U" template (12) equals with the width of section bar for the transmission tower.

3. The section bender for the transmission towers according to claim 2, characterized in that: the utility model discloses a positioning device, including "U" template (12), "U" template (12) inside lateral wall symmetry is equipped with location pearl (24), location pearl (24) are along the spacing groove removal of locating "U" template (12) lateral wall, the diameter and the location pearl (24) of spacing groove match, through the spring that is equipped with pre-stressed between the tank bottom of location pearl (24) and spacing groove, the groove coaxial fixation of spacing groove has the retaining ring, the internal diameter of retaining ring is less than the diameter of location pearl (24).

4. A section bender for transmission towers according to claim 3, characterized in that: and the connecting line of the positioning bead (24) and the axis of the rotary roller (8) is vertical to the groove bottom of the limiting groove opening (9).

5. A section bender for transmission towers according to claim 3, characterized in that: the distance between the positioning beads (24) and the rollers (23) is smaller than the thickness of the section bar for the power transmission tower.

6. The section bender for the transmission towers according to claim 2, characterized in that: the groove bottom of the limiting groove opening (9) is lower than the groove opening bottom edge of the position between the two side plates corresponding to the U-shaped plate (12), the height of the groove opening bottom edge is lower than or equal to the height of the top surface of the bottom plate of the U-shaped plate (12), and the U-shaped plate (12) is fixed in the limiting groove opening (9) through a puller bolt (13).

7. The section bender for the transmission tower according to claim 6, wherein: the limiting notch (9) is far away from the notch bottom edge on one side of the horizontal pressing rod (3) and is provided with a threaded hole matched with the puller bolt (13), and the puller bolt (13) penetrates through the threaded hole to tightly fix the U-shaped plate (12) and the notch bottom edge on the other side.

8. The section bender for the power transmission towers according to claim 1, wherein: the both ends of horizontal depression bar (3) are fixed in piston rod (14) tip of hydraulic piston (4), the lateral wall surface of horizontal depression bar (3) has set gradually cylinder cambered surface (20) of a plurality of different diameters, piston rod (14) are equipped with spacing roller (11) of one row of parallel towards the bilateral symmetry of changeing roller (8), the both ends of spacing roller (11) are rotated respectively and are connected in link (18), link (18) are fixed in piston rod (14), spacing roller (11) are tangent with cylinder cambered surface (20) of horizontal depression bar (3) bottom towards the common tangent line of changeing roller (8) one side.

9. The section bender for transmission towers according to claim 8, wherein: the two ends of the horizontal pressing rod (3) are fixed with the piston rod (14) through the connecting rod (17), the connecting rod (17) is provided with a through hole, the end part of the horizontal pressing rod (3) is provided with a threaded rod (19) parallel to the axis of the horizontal pressing rod (3), the outer diameter of the threaded rod (19) is matched with the through hole, nuts which are matched with each other are arranged on the two sides of the threaded rod (19) which are located on the connecting rod (17), and the horizontal pressing rod (3) is fixed with the connecting rod (17) through the nuts.

10. A section bender for transmission towers according to claim 9, characterized in that: connecting rod (17) are equipped with the constant head tank respectively towards on the side end face of horizontal depression bar (3), the upper and lower side that is located the through-hole, horizontal depression bar (3) are equipped with respectively on the terminal surface towards connecting rod (17) with every cylinder cambered surface (20) location sand grip (15) that correspond respectively, the structure and the constant head tank matching of location sand grip (15), when a certain cylinder cambered surface (20) is located horizontal depression bar (3) under, location sand grip (15) and constant head tank accordant connection that this cylinder cambered surface (20) corresponds.