Internal suspension stay-wire-free derrick iron tower cross arm hoisting device

Abstract

The invention relates to the technical field of transmission tower installation and construction, in particular to an internal suspension stay-wire-free derrick tower cross arm hoisting device. The device comprises a derrick mechanism, a supporting mechanism, a hoisting mechanism and a lifting mechanism, the derrick mechanism is installed on the power transmission tower through the supporting mechanism, the derrick mechanism comprises a suspension derrick and an auxiliary derrick, one side of the auxiliary derrick is fixed to a main material of the power transmission tower in a pulling connection mode through a stable pull rod, and the supporting mechanism comprises a derrick base. The derrick mechanism is beneficial to providing hoisting support and is used for hoisting and hoisting during installation and construction of the power transmission tower, the supporting mechanism is used for supporting the derrick mechanism, the derrick mechanism is beneficial to being suspended in the power transmission tower and is convenient to erect, a traditional tower crane device is effectively replaced, the suspended derrick is used for supporting the auxiliary derrick, and the auxiliary derrick is convenient to adjust the inclination angle; the cross arm can be conveniently hoisted from the side face, and the derrick base is used for connecting the suspension derrick and the auxiliary derrick.

Description

Technical Field

[0001] The invention relates to the technical field of installation and construction of a power transmission iron tower, in particular to a cross arm hoisting device for an internally suspended iron tower without a guy wire holding rod. Background Art

[0002] There are mainly two types of transmission tower erection construction. One is to use a heavy-load pulling vehicle to pull the transmission tower upright after the horizontal assembly on the ground is completed. This method is only suitable for the erection of transmission towers with a narrow width and a small overall size. The other is to use lifting equipment to splice and erect the transmission tower components from low to high in layers. The lifting equipment used includes tower cranes and jib cranes.

[0003] A pole holder is a lifting device that lifts and moves objects by pulling ropes connected to the load-bearing structure through driving mechanisms such as capstans and winches during the assembly of iron towers in overhead power transmission line projects. It is flexible, maneuverable, economical, and less restricted by external conditions. It has always been widely used in power transmission line construction. Suspended pole holder is a traditional equipment for assembling iron towers for overhead power transmission lines. It is flexible and convenient, and mainly includes internal suspension and external guyed pole holder tower assembly and internal suspension and internal guyed pole holder tower assembly.

[0004] Both the internally suspended and externally guyed tower and the internally suspended and internally guyed tower have certain limitations and disadvantages. Since the guying position of the internally suspended and externally guyed tower needs to be set at a position 1.2 times the tower height, it occupies a large area and is greatly affected by the terrain conditions of the construction site. The internally suspended and internally guyed tower has high risks and great safety hazards. Summary of the invention

[0005] In order to solve the problem that the wire drawing occupies a large area and the construction is inflexible during the construction of the suspended pole, the present invention provides an internally suspended pole-free iron tower cross arm hoisting device.

[0006] The invention provides an internally suspended, guy-free, pole-holding iron tower crossarm hoisting device that adopts the following technical solution:

[0007] The invention discloses an internally suspended, guy-wire-free pole-holding iron tower crossarm hoisting device, comprising a pole-holding mechanism, a supporting mechanism, a hoisting mechanism and a lifting mechanism, wherein the pole-holding mechanism is installed on a transmission iron tower through the supporting mechanism, and the hoisting mechanism and the lifting mechanism are respectively installed on the pole-holding mechanism, and the pole-holding mechanism comprises a suspended pole and an auxiliary pole, and the suspended pole and the auxiliary pole are connected and assembled to each other through a pole connecting seat, and one side of the auxiliary pole is fixed to a main material of the transmission iron tower through a stabilizing pull rod, and the supporting mechanism comprises a pole-holding base, and the pole-holding base is fixedly connected to the top of the transmission iron tower through the pole-holding base.

[0008] The pole holding mechanism is conducive to providing lifting support and is used for lifting and hoisting during the installation and construction of the transmission tower. The supporting mechanism is used to support the pole holding mechanism, which is conducive to the pole holding mechanism being suspended in the transmission tower, which is convenient for erection and effectively replaces the traditional tower crane device. The lifting mechanism is used to lift and hoist the cross arm of the transmission tower. The lifting mechanism is used to adjust the height of the pole holding mechanism, which is convenient for rising along with the erection of the transmission tower. The suspended pole is used to support the auxiliary pole. The auxiliary pole is convenient for adjusting the inclination angle, which is conducive to lifting the cross arm from the side. The pole base is used to connect the suspended pole and the auxiliary pole.

[0009] Furthermore, a top connecting seat is provided at the top of the suspension holding pole, and a lifting wire seat is provided at the bottom. The suspension holding pole is connected to a bolt seat on the holding pole connecting seat through the top connecting seat.

[0010] Furthermore, a connecting head is provided at the bottom of the auxiliary holding pole, and a pulling joint is provided at the top. The auxiliary holding pole is connected to the lower holding pole through the connecting head, and the auxiliary holding pole is connected to the holding pole support through the pulling joint. The lower holding pole and the holding pole support are connected at the end. The auxiliary holding pole, the lower holding pole and the holding pole support form a triangular structure, and the connection between the auxiliary holding pole and the lower holding pole is hinged on the hinged seat on the holding pole connecting seat.

[0011] The lower holding pole is used to balance the tilting force of the auxiliary holding pole, which is beneficial to maintain the stable support of the auxiliary holding pole. The holding pole support is used to connect the auxiliary holding pole and the lower holding pole to form a triangular stable structure, which is convenient for double-sided force application and is not easy to deform as a whole.

[0012] Furthermore, a hinged joint is provided at the top end of the stabilizing rod, and a fixing fixture is provided at the bottom end. The stabilizing rod is hinged at the connection between the lower holding rod and the holding rod support through the hinged joint. The stabilizing rod is fixedly connected to the main material of the transmission tower through the fixing fixture. A telescopic arm is provided on the stabilizing rod, and a ground stabilizing wire is connected to the side of the top of the auxiliary holding rod away from the stabilizing rod.

[0013] The ground stabilizing wires and stabilizing rods fix the suspended boom and auxiliary boom in four directions on both sides. The stabilizing rods replace the ground stabilizing wires on the same side, saving construction area and being suitable for construction in narrow areas. The telescopic arms facilitate the adjustment of the length of the stabilizing rods and are used to adjust the angle of the auxiliary boom.

[0014] Furthermore, the pole base is supported by a connecting frame at a position close to the top of the main material of the power transmission tower, and is fixed to the main material of the power transmission tower by a base material clamp.

[0015] Furthermore, the supporting mechanism also includes a main material bracket and a suspension bracket, one end of the main material bracket is provided with a pole clamp, and the other end is provided with a main material clamp, and multiple main material brackets are arranged in a circle around the bottom of the auxiliary pole, one end of the main material bracket is connected and fixed to the auxiliary pole through the pole clamp, and the other end is connected and fixed to the main material of the transmission tower through the main material clamp, one end of the suspension bracket is provided with a suspension clamp, and the other end is provided with a supporting clamp, and multiple suspension brackets are arranged in a circle around the bottom of the suspension pole, one end of the suspension bracket is connected and fixed to the suspension pole through the suspension clamp, and the other end is connected and fixed to the main material of the transmission tower through the supporting clamp.

[0016] The main material bracket is used to assist in supporting the auxiliary holding pole to reduce the shaking of the auxiliary holding pole. The suspension bracket is used to auxiliary connect and fix the suspension bracket to increase the supporting load of the suspension bracket.

[0017] Furthermore, the lifting mechanism includes a lifting pulley, a lifting rope and a pulling mechanism. The lifting pulley is installed on the top of the auxiliary holding rod. One end of the lifting rope is passed around the lifting pulley and suspended, and the other end is connected to the pulling mechanism.

[0018] Furthermore, a guide pulley is installed on the suspended holding boom, and a bottom pulley is installed on the ground directly below the suspended holding boom. The lifting rope is passed around the lifting pulley, the guide pulley and the bottom pulley in sequence and is finally wrapped around the pulling mechanism. The hanging end of the lifting rope is divided into multiple forked tethers, and the forked tethers are bolted to the crossarm of the hoisted tower in a dispersed manner. The crossarm of the tower is also stabilized by a stabilizing pull rope. The pulling mechanism includes a capstan and a pulling motor. The rotating shaft of the capstan is connected to the main shaft of the pulling motor.

[0019] The guide pulley and the bottom pulley are used to guide the winding of the lifting rope to prevent the lifting rope from interfering with the erection of the transmission tower. The forked tying rope is used to connect the tower crossarm to improve the stability of the tower crossarm during hoisting and reduce shaking and rotation. The stabilizing rope further improves the stability of the tower crossarm during hoisting.

[0020] Furthermore, the lifting mechanism includes a waist ring and a lifting cable. The waist ring surrounds and is sleeved on the suspension arm and fixed on the main material of the transmission tower. One end of the lifting cable is connected to the lifting cable seat of the suspension arm, and the other end is connected to the capstan.

[0021] The waist ring is used to fix the position of the suspension pole and reduce the shaking and deflection of the suspension pole when it is lifted or fixed.

[0022] Furthermore, one circle of the waist ring is radially connected and fixed to the main material of the transmission tower through multiple waist ring cables, and a waist ring is respectively sleeved on the upper and lower parts of the suspension bracket, and the waist ring cables are connected and fixed to the main material of the transmission tower through cable clamps, and a guide gasket is provided at the contact between the waist ring and the suspension bracket. Four lifting cables are bolted evenly spaced on the lifting cable seat, and each of the lifting cables passes around the lifting seat pulley, the top pulley and the ground pulley in turn, and is bundled into one at the end through a bundling sleeve and connected to the capstan. The top pulley is installed at the top position of the main material of the transmission tower, the lifting seat pulley is installed on the lifting cable seat, and the ground pulley is installed at the bottom support point of the main material of the transmission tower.

[0023] The guide gasket helps to reduce the friction between the waist ring and the suspension pole. The four lifting cables are pulled at the same time, which effectively improves the stable ascent of the suspension pole.

[0024] In summary, the present invention has the following beneficial technical effects:

[0025] 1. The holding rod mechanism is conducive to providing lifting support and is used for lifting and hoisting during the installation and construction of the transmission tower. The supporting mechanism is used to support the holding rod mechanism, which is conducive to the holding rod mechanism being suspended in the transmission tower, which is convenient for erection and effectively replaces the traditional tower crane device. The lifting mechanism is used to lift and hoist the cross arm of the transmission tower. The lifting mechanism is used to adjust the height of the holding rod mechanism, which is convenient for rising with the erection of the transmission tower. The suspended holding rod is used to support the auxiliary holding rod. The auxiliary holding rod is convenient for adjusting the inclination angle, which is conducive to lifting the cross arm from the side. The holding rod base is used to connect the suspended holding rod and the auxiliary holding rod.

[0026] 2. The lower holding pole is used to balance the tilting force of the auxiliary holding pole, which is conducive to maintaining the stable support of the auxiliary holding pole. The holding pole support is used to connect the auxiliary holding pole and the lower holding pole to form a triangular stable structure, which is convenient for double-sided force application and is not easy to deform as a whole.

[0027] 3. The ground stabilizing wire and stabilizing rod fix the suspended boom and auxiliary boom in four directions on both sides. The stabilizing rod replaces the ground stabilizing wire on the same side, saving construction area and is suitable for construction in narrow areas. The telescopic arm facilitates the adjustment of the length of the stabilizing rod and is used to adjust the angle of the auxiliary boom.

[0028] 4. The main material bracket is used to assist in supporting the auxiliary holding rod to reduce the shaking of the auxiliary holding rod. The suspension bracket is used to auxiliary connect and fix the suspension bracket to increase the supporting load of the suspension bracket.

[0029] 5. The guide pulley and bottom pulley are used to guide the winding of the lifting rope to prevent the lifting rope from interfering with the erection of the transmission tower. The forked tying rope is used to connect the tower crossarm to improve the stability of the tower crossarm during hoisting and reduce shaking and rotation. The stabilizing rope further improves the stability of the tower crossarm during hoisting.

[0030] 6. The waist ring is used to fix the position of the suspension pole and reduce the shaking and deflection of the suspension pole when it is lifted or fixed. The guide gasket is helpful to reduce the friction between the waist ring and the suspension pole. The four lifting cables are pulled at the same time, which effectively improves the stable rise of the suspension pole when it is lifted. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the construction and use status of the present invention;

[0032] Figure 2 for Figure 1 A local enlarged schematic diagram of point A;

[0033] Figure 3 for Figure 1 A local enlarged schematic diagram of point B;

[0034] Figure 4 for Figure 1 A local enlarged schematic diagram of point C;

[0035] Figure 5 for Figure 1 A local enlarged schematic diagram of point D.

[0036] Description of reference numerals:

[0037] 1. Pole holding mechanism, 11. Suspended pole, 111. Top connecting seat, 112. Lifting wire seat, 12. Auxiliary pole, 121. Lower pole, 122. Pole support, 123. Connector, 124. Pull joint, 125. Ground stabilizing wire, 13. Pole connecting seat, 131. Articulated seat, 132. Bolt seat, 14. Stabilizing pull rod, 141. Articulated head, 142. Fixing fixture, 143. Telescopic arm;

[0038] 2. Support mechanism, 21. Pole base, 211. Connecting frame, 212. Base material fixture, 22. Main material bracket, 221. Pole fixture, 222. Main material fixture, 23. Suspension bracket, 231. Suspension fixture, 232. Support fixture;

[0039] 3. Hoisting mechanism, 31. Lifting pulley, 311. Guide pulley, 312. Bottom pulley, 32. Lifting rope, 321. Forked tether rope, 322. Stabilizing pull rope, 33. Wire pulling mechanism, 331. Capstan, 332. Wire pulling motor;

[0040] 4. Lifting mechanism, 41. Waist ring, 411. Waist ring pull wire, 412. Pull wire clamp, 413. Guide gasket, 42. Lifting pull wire, 421. Top pulley, 422. Lifting seat pulley, 423. Anchor pulley, 424. Cluster sleeve. DETAILED DESCRIPTION

[0041] The following will be combined with the attached Figure 1-Figure 5 , the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0043] Embodiment 1:

[0044] The embodiment of the present invention discloses a cross arm hoisting device for an internally suspended iron tower without a guy wire, referring to Figure 1-Figure 3 , including a pole holding mechanism 1, a supporting mechanism 2, a hoisting mechanism 3 and a lifting mechanism 4, the pole holding mechanism 1 is installed on the transmission tower through the supporting mechanism 2, the hoisting mechanism 3 and the lifting mechanism 4 are respectively installed on the pole holding mechanism 1, the pole holding mechanism 1 includes a suspended pole 11 and an auxiliary pole 12, the suspended pole 11 and the auxiliary pole 12 are connected and assembled to each other through a pole connecting seat 13, one side of the auxiliary pole 12 is pulled and fixed to the main material of the transmission tower through a stabilizing pull rod 14, the supporting mechanism 2 includes a pole base 21, and the pole connecting seat 13 is fixedly connected to the top of the transmission tower through the pole base 21.

[0045] During installation, the holding mechanism 1 is transported to the construction site and then assembled. The holding mechanism 1 is lifted by a crane and transported to the transmission tower. The holding mechanism 1 is then fixed to the transmission tower by the supporting mechanism 2, and the hoisting mechanism 3 and the lifting mechanism 4 are respectively connected to the holding mechanism 1.

[0046] When the pole mechanism 1 is spliced, the suspension pole 11 and the auxiliary pole 12 are firstly installed and fixed on the pole connecting seat 13 respectively. After the suspension pole 11 and the auxiliary pole 12 are hoisted in place as a whole, the auxiliary pole 12 is fixed by the stabilizing rod 14.

[0047] When in use, the auxiliary holding rod 12 is adjusted to a suitable tilt angle, and then the stabilizing rod 14 is fixed, and the tower cross arm is suspended to a position by the hoisting mechanism 3 and then installed on the transmission tower.

[0048] When installing a transmission tower, the lifting mechanism 4 is used to continuously adjust the height of the holding mechanism 1 according to the installation height of the transmission tower.

[0049] Embodiment 2:

[0050] On the basis of Example 1, add:

[0051] Reference Figure 1 and Figure 2 The top of the suspension holding pole 11 is provided with a top connecting seat 111, and the bottom is provided with a lifting wire seat 112. The suspension holding pole 11 is connected to the bolt seat 132 on the holding pole connecting seat 13 through the top connecting seat 111.

[0052] Reference Figure 1 and Figure 2 A connector 123 is provided at the bottom of the auxiliary holding pole 12, and a pull joint 124 is provided at the top. The auxiliary holding pole 12 is connected to the lower holding pole 121 through the connector 123. The auxiliary holding pole 12 is connected to the holding pole support 122 through the pull joint 124. The lower holding pole 121 and the holding pole support 122 are connected at the end. The auxiliary holding pole 12, the lower holding pole 121 and the holding pole support 122 form a triangular structure. The connection between the auxiliary holding pole 12 and the lower holding pole 121 is hinged on the hinged seat 131 on the holding pole connecting seat 13.

[0053] Reference Figure 1 and Figure 3 The top of the stabilizing rod 14 is provided with a hinge joint 141, and the bottom end is provided with a fixing fixture 142. The stabilizing rod 14 is hinged at the connection between the lower holding rod 121 and the holding rod support 122 through the hinge joint 141. The stabilizing rod 14 is fixedly connected to the main material of the transmission tower through the fixing fixture 142. The stabilizing rod 14 is provided with a telescopic arm 143. The top of the auxiliary holding rod 12 is connected to a ground stabilizing wire 125 on the side away from the stabilizing rod 14.

[0054] Embodiment 3:

[0055] On the basis of Example 1, add:

[0056] Reference Figure 1 and Figure 2 The pole base 21 is supported by a connecting frame 211 at a position close to the top of the main material of the power transmission tower, and is fixed on the main material of the power transmission tower by a base material fixture 212.

[0057] Reference Figure 1 and Figure 2 , the support mechanism 2 also includes a main material support 22 and a suspension support 23;

[0058] One end of the main material bracket 22 is provided with a pole clamp 221, and the other end is provided with a main material clamp 222. A plurality of main material brackets 22 are arranged in a circle around the bottom of the auxiliary pole 12. One end of the main material bracket 22 is connected and fixed to the auxiliary pole 12 through the pole clamp 221, and the other end is connected and fixed to the main material of the transmission tower through the main material clamp 222.

[0059] One end of the suspension bracket 23 is provided with a suspension fixture 231, and the other end is provided with a support fixture 232. Multiple suspension brackets 23 are arranged in a circle around the bottom of the suspension pole 11. One end of the suspension bracket 23 is connected and fixed to the suspension pole 11 through the suspension fixture 231, and the other end is connected and fixed to the main material of the transmission tower through the support fixture 232.

[0060] Embodiment 4:

[0061] On the basis of Example 1, add:

[0062] Reference Figure 1 , Figure 4 and Figure 5 The lifting mechanism 3 includes a lifting pulley 31, a lifting rope 32 and a pulling mechanism 33. The lifting pulley 31 is installed at the top of the auxiliary holding rod 12. One end of the lifting rope 32 is passed around the lifting pulley 31 and suspended, and the other end is connected to the pulling mechanism 33.

[0063] Reference Figure 1 , Figure 4 and Figure 5 A guide pulley 311 is installed on the suspension holding rod 11, and a bottom pulley 312 is installed on the ground directly below the suspension holding rod 11. The suspension rope 32 passes through the lifting pulley 31, the guide pulley 311 and the bottom pulley 312 in sequence and is finally wound around the wire pulling mechanism 33;

[0064] The suspension end of the suspension rope 32 is divided into a plurality of forked tethers 321, and the forked tethers 321 are bolted to the cross arm of the hoisted iron tower in a dispersed manner, and the cross arm of the iron tower is also pulled and stabilized by a stabilizing rope 322;

[0065] The wire pulling mechanism 33 includes a capstan 331 and a wire pulling motor 332 , and the rotating shaft of the capstan 331 is connected to the main shaft of the wire pulling motor 332 .

[0066] Embodiment 5:

[0067] On the basis of Example 1, add:

[0068] Reference Figure 1 , Figure 3 and Figure 5The lifting mechanism 4 includes a waist ring 41 and a lifting cable 42. The waist ring 41 surrounds and is sleeved on the suspension pole 11 and is fixed on the main material of the transmission tower. One end of the lifting cable 42 is connected to the lifting cable seat 112 of the suspension pole 11, and the other end is connected to the capstan 331.

[0069] Reference Figure 3 and Figure 4 The waist ring 41 is radially connected and fixed to the main material of the power transmission tower through multiple waist ring cables 411, and the upper and lower parts of the suspension pole 11 are respectively covered with a waist ring 41, and the waist ring cables 411 are connected and fixed to the main material of the power transmission tower through cable clamps 412. A guide gasket 413 is provided at the contact between the waist ring 41 and the suspension pole 11;

[0070] Four lifting cables 42 are bolted evenly spaced in a circle on the lifting cable seat 112, and each of the lifting cables 42 passes through a lifting seat pulley 422, a top pulley 421 and a ground pulley 423 in turn, and is bundled into one at the end through a bundling sleeve 424 and connected to the capstan 331. The top pulley 421 is installed at the top position of the main material of the transmission tower, the lifting seat pulley 422 is installed on the lifting cable seat 112, and the ground pulley 423 is installed at the bottom support point of the main material of the transmission tower.

[0071] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A cross arm hoisting device for an internally suspended, guy-free pole-holding iron tower, comprising a pole-holding mechanism (1), a supporting mechanism (2), a hoisting mechanism (3) and a lifting mechanism (4), wherein the pole-holding mechanism (1) is mounted on a transmission iron tower via the supporting mechanism (2), and the hoisting mechanism (3) and the lifting mechanism (4) are respectively mounted on the pole-holding mechanism (1), characterized in that: The pole holding mechanism (1) comprises a suspended pole holding mechanism (11) and an auxiliary pole holding mechanism (12); the suspended pole holding mechanism (11) and the auxiliary pole holding mechanism (12) are connected and assembled to each other via a pole holding mechanism connection seat (13); one side of the auxiliary pole holding mechanism (12) is connected and fixed to the main material of the power transmission tower via a stabilizing pull rod (14); The support mechanism (2) comprises a pole base (21), and the pole connecting seat (13) is fixedly connected to the top of the transmission tower via the pole base (21).

2. According to claim 1, the internally suspended, guy-free iron tower cross arm hoisting device is characterized by: The top of the suspended holding pole (11) is provided with a top connecting seat (111), and the bottom is provided with a lifting wire seat (112); the suspended holding pole (11) is connected to a bolt seat (132) on the holding pole connecting seat (13) via the top connecting seat (111).

3. The cross arm hoisting device for an internally suspended iron tower without a guy wire according to claim 1 or 2, characterized in that: The auxiliary holding pole (12) is provided with a connecting head (123) at the bottom and a pulling joint (124) at the top; the auxiliary holding pole (12) is connected to a lower holding pole (121) via the connecting head (123); the auxiliary holding pole (12) is connected to a holding pole support (122) via the pulling joint (124); the lower holding pole (121) and the holding pole support (122) are connected at the ends; the auxiliary holding pole (12), the lower holding pole (121) and the holding pole support (122) form a triangular structure; the connection between the auxiliary holding pole (12) and the lower holding pole (121) is hinged on a hinged seat (131) on a holding pole connecting seat (13).

4. According to claim 3, the internally suspended, guy-free iron tower cross arm hoisting device is characterized by: The top of the stabilizing rod (14) is provided with a hinge joint (141), and the bottom is provided with a fixing fixture (142); the stabilizing rod (14) is hinged to the connection between the lower holding rod (121) and the holding rod support (122) through the hinge joint (141); the stabilizing rod (14) is fixedly connected to the main material of the transmission tower through the fixing fixture (142); a telescopic arm (143) is provided on the stabilizing rod (14); and a ground stabilizing wire (125) is connected to the top of the auxiliary holding rod (12) away from the stabilizing rod (14).

5. According to claim 1, the internally suspended, guy-free iron tower cross arm hoisting device is characterized by: The pole base (21) is supported at a position close to the top of the main material of the power transmission tower via a connecting frame (211), and is fixed on the main material of the power transmission tower via a base material fixture (212).

6. The cross arm hoisting device for an internally suspended iron tower without guy wires according to claim 1 or 5, characterized in that: The support mechanism (2) further comprises a main material support (22) and a suspension support (23); One end of the main material support (22) is provided with a pole clamp (221), and the other end is provided with a main material clamp (222); a plurality of main material supports (22) are arranged in a circle around the bottom of the auxiliary pole (12); one end of the main material support (22) is connected and fixed to the auxiliary pole (12) through the pole clamp (221), and the other end is connected and fixed to the main material of the transmission tower through the main material clamp (222); One end of the suspension bracket (23) is provided with a suspension fixture (231), and the other end is provided with a support fixture (232); a plurality of the suspension brackets (23) are arranged in a circle around the bottom of the suspension pole (11); one end of the suspension bracket (23) is connected and fixed to the suspension pole (11) through the suspension fixture (231), and the other end is connected and fixed to the main material of the transmission tower through the support fixture (232).

7. The cross arm hoisting device for an internally suspended iron tower without a guy wire according to claim 1 is characterized in that: The hoisting mechanism (3) comprises a lifting pulley (31), a lifting rope (32) and a pulling wire mechanism (33); the lifting pulley (31) is installed at the top of the auxiliary holding rod (12); one end of the lifting rope (32) is passed around the lifting pulley (31) and is suspended, and the other end is connected to the pulling wire mechanism (33).

8. The cross arm hoisting device for an internally suspended iron tower without a guy wire as claimed in claim 7 is characterized in that: A guide pulley (311) is installed on the suspension holding rod (11), a bottom pulley (312) is installed on the ground directly below the suspension holding rod (11), and the suspension rope (32) is passed through the lifting pulley (31), the guide pulley (311) and the bottom pulley (312) in sequence and finally wound around the wire pulling mechanism (33); The hanging end of the hoist rope (32) is divided into a plurality of forked tether ropes (321), and the forked tether ropes (321) are bolted to the cross arm of the hoisted iron tower in a dispersed manner, and the cross arm of the iron tower is also pulled and stabilized by a stabilizing pull rope (322); The wire pulling mechanism (33) comprises a capstan (331) and a wire pulling motor (332), and the rotating shaft of the capstan (331) is connected to the main shaft of the wire pulling motor (332).

9. The cross arm hoisting device for an internally suspended iron tower without guy wires according to claim 1 is characterized in that: The lifting mechanism (4) comprises a waist ring (41) and a lifting cable (42); the waist ring (41) surrounds and is sleeved on the suspension pole (11) and is fixed on the main material of the transmission tower; one end of the lifting cable (42) is connected to the lifting cable seat (112) of the suspension pole (11), and the other end is connected to the capstan (331).

10. The cross arm hoisting device for an internally suspended iron tower without a guy wire as claimed in claim 9, characterized in that: The waist ring (41) is radially connected and fixed to the main material of the power transmission tower through a plurality of waist ring pull wires (411), and the upper and lower parts of the suspension holding rod (11) are respectively sleeved with a waist ring (41), and the waist ring pull wires (411) are connected and fixed to the main material of the power transmission tower through pull wire clamps (412), and a guide gasket (413) is provided at the contact point between the waist ring (41) and the suspension holding rod (11); Four lifting cables (42) are bolted evenly spaced in a circle on the lifting cable seat (112), and each of the lifting cables (42) is passed through a lifting seat pulley (422), a top pulley (421) and a ground pulley (423) in sequence, and is bundled into one at the end through a bundling sleeve (424) and connected to a capstan (331). The top pulley (421) is installed at the top position of the main material of the transmission tower, the lifting seat pulley (422) is installed on the lifting cable seat (112), and the ground pulley (423) is installed at the bottom support point of the main material of the transmission tower.

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