CN218560915U - Onshore wind driven generator installation and maintenance crane - Google Patents

Abstract

The utility model discloses an installation and maintenance crane of a land wind driven generator, which is characterized by comprising a telescopic tower column, wherein the bottom section of the telescopic tower column is articulated on a trailer; the top end of the top section of the telescopic tower column is provided with a cantilever arm, a balance arm and an oil cylinder; and a guide hoop and a flexible hoop which can be switched between a closed state and an open state are arranged on the second section of the telescopic tower column. The utility model provides a pair of land aerogenerator installation, maintenance hoist possess transport facility, on-the-spot installation time is short, convenient operation, maintenance low cost, to advantages such as domestic existing aerogenerator universality height. The utility model discloses can be used for each topography, various model land aerogenerator's installation, maintenance work.

Description

Crane for installing and maintaining land wind driven generator

Technical Field

The utility model relates to a land aerogenerator installs, maintains hoist for realize land aerogenerator's installation, maintenance work, belong to wind power generation technical field.

Background

With the proposition of the goals of carbon peak reaching and carbon neutralization, the wind power generation industry is vigorously developed under the situation of greatly promoting green, low carbon and scientific innovation. Nowadays, the world energy structure is undergoing a great revolution, and wind energy is increasingly important as a renewable energy source. In recent years, the installed capacity of domestic wind power occupies the first place of the world, and with the rapid increase of the demand of the domestic wind power installed, the installation and maintenance work of derived large-scale wind power equipment is also increased unprecedentedly. The height of large-scale wind power equipment can reach hundreds of meters, the weight of the large-scale wind power equipment can reach hundreds of tons, a large-scale crawler crane is generally used as main hoisting equipment in a wind power construction project, and an automobile crane is equipped as auxiliary hoisting equipment, so that the installation and maintenance cost is high. Under the situation, the development of novel wind driven generator installation and maintenance hoisting equipment with high safety factor, convenient construction and strong adaptability is imperative in wind driven generator installation and maintenance engineering.

At present, large-scale crawler cranes are adopted for maintenance of domestic wind power generation equipment, the large-scale cranes are long in self-assembly period and complex in installation, and a large number of auxiliary vehicles enter a field. The maintenance cost of the 1.5-2.5 MW wind driven generator is about 60-70 ten thousand yuan per platform on average, the energy consumption is high, the required space is large, the operation area is wide, the maintenance efficiency is low, the wind driven generator is not easy to be unfolded to work in a wind power equipment field, and particularly, large crane machinery is difficult to reach an installation place under complex terrains such as a mountain top, a mud flat and the like, so that great obstruction is brought to the installation and maintenance work of the wind driven generator. If the maintenance crane is fixedly installed on the wind driven generator, all the wind driven generator sets of the wind power plant need to be equipped with one maintenance crane, the utilization rate of the maintenance crane is extremely low, the cost is greatly increased, and the maintenance crane cannot be realized in reality.

A climbing type wind power maintenance hoisting device exists in foreign wind power maintenance work, but drilling needs to be carried out on a tower barrel of a wind driven generator, and the climbing type wind power maintenance hoisting device carries out climbing operation by taking a hole as a fulcrum. The technical scheme relates to the change of the production and processing of the tower drum, and has low adaptability.

Disclosure of Invention

The utility model aims at: make up the deficiencies in the aspects of maintenance equipment cost and transportation of the large-scale crawler crane.

In order to achieve the aim, the technical scheme of the utility model is to provide a crane for installing and maintaining a land wind driven generator, which is characterized by comprising a telescopic tower column, wherein the bottom section of the telescopic tower column is hinged on a trailer; a tower column turning oil cylinder is arranged on the trailer, and the telescopic tower column is driven to change between a horizontal state and a vertical state through the tower column turning oil cylinder;

the top end of the top section of the telescopic tower column is provided with a telescopic arm, a balance arm and an oil cylinder, the telescopic end of the oil cylinder is hinged with the balance arm, and the balance arm is hinged with the telescopic arm; after the telescopic tower column is jacked in place, a tail rope synchronous rotating device is arranged at the bottom section of the telescopic tower column, and a tail rope led out from the boom is connected with the tail rope synchronous rotating device;

a guide hoop and a flexible hoop which can be switched between a closed state and an open state are arranged on the second section of the telescopic tower column, when the guide hoop is in the open state, a guide hoop opening of the guide hoop is exposed outside, and when the guide hoop is in the closed state, the guide hoop opening is closed; the guide hoop in a closed state surrounds the outside of the wind driven generator tower, the guide hoop is provided with a hydraulic system, and the extrusion force of the guide hoop on the wind driven generator tower is always kept at a set value through the hydraulic system; in the process of jacking the telescopic tower column, the guide hoop plays a role in guiding;

when the flexible anchor ear is in an open state, the opening of the flexible anchor ear is exposed outside, and when the flexible anchor ear is in a closed state, the opening of the flexible anchor ear is closed; the flexible hoop in a closed state surrounds the wind driven generator tower, the flexible hoop has variable roundness, and when the roundness of the flexible hoop is the maximum designed roundness, no friction force exists between the flexible hoop and the wind driven generator tower; the roundness of the flexible hoop is reduced to be attached to the wind driven generator tower until enough friction force is generated between the flexible hoop and the wind driven generator tower so as to support the operation of installing and maintaining the crane of the onshore wind driven generator.

Preferably, the guide hoop comprises a guide hoop bracket fixed on the telescopic tower column; the hydraulic system is arranged on the guide hoop support and comprises a hydraulic subsystem I and a hydraulic subsystem II; the hydraulic subsystem unit and the hydraulic subsystem unit are respectively connected to one end of the hoop bracket I and one end of the hoop bracket II; a gap is formed between the other ends of the first hoop bracket and the second hoop bracket, and the gap is a guide hoop opening; the other ends of the first hoop bracket and the second hoop bracket are also provided with locking devices driven by the opening and closing oil cylinders, and the locking devices are driven by the opening and closing oil cylinders to open or close a gap between the first hoop bracket and the other end of the second hoop bracket, so that the state of the guide hoop is switched between an open state and a closed state; the locking device and the hydraulic subsystem are simultaneously tensioned, so that the hoop bracket I and the hoop bracket II are deformed, and the deformed hoop bracket I and the deformed hoop bracket II extrude the wind driven generator tower at a set pressure, so that the hoop bracket I and the hoop bracket II can always surround the wind driven generator tower under the condition that the diameter of the wind driven generator tower is changed; and guide wheels are arranged on the inner sides of the hoop bracket I and the hoop bracket II, and the guide wheels are tightly attached to the wind driven generator tower after the wind driven generator tower is encircled by the guide hoops, so that a guide effect is achieved.

Preferably, the flexible hoop comprises a flexible hoop support with a flexible hoop opening, and the flexible hoop support is fixedly connected with the telescopic tower column; the flexible hoop support is connected with the hoop bracket which can be opened and closed, when the hoop bracket is opened, the opening of the flexible hoop is exposed outside, and the flexible hoop is in an open state; when the hoop bracket is closed, the opening of the flexible hoop is closed, and the flexible hoop is in a closed state;

the flexible hoop support is provided with a jacking oil cylinder, and the jacking oil cylinder is connected with the guide frame; one end of each of the two support rods is hinged with the guide frame, the other end of each of the two support rods is respectively connected with two ends of the short half-cycle elastic hoop, and the jacking oil cylinder drives the short half-cycle elastic hoop to extend and shorten through the guide frame and the support rods;

the inner side of the hoop bracket is provided with a long semi-circle elastic hoop which is fixedly connected with a telescopic supporting rod, and the telescopic supporting rod is fixed on the hoop bracket; one end of the long semi-circle elastic hoop is connected with the telescopic rod of the first tensioning oil cylinder, and the other end of the long semi-circle elastic hoop is detachably connected with the telescopic rod of the second tensioning oil cylinder through a hook structure; the long half-cycle elastic hoop is extended and shortened through the tensioning oil cylinder I and the tensioning oil cylinder II;

the short half-cycle elastic hoop is matched with the long half-cycle elastic hoop to form an equivalent whole circle encircling the wind driven generator tower, and after the short half-cycle elastic hoop and the long half-cycle elastic hoop are correspondingly extended and shortened, the roundness of the equivalent whole circle is changed.

Preferably, the cylinder bodies of the tensioning cylinder I and the tensioning cylinder II are fixed on the flexible hoop bracket and hinged with the flexible hoop bracket; two ends of the return tension spring are respectively connected and fixed with the cylinder body of the tensioning oil cylinder I or the tensioning oil cylinder II and the flexible hoop bracket; and a stop block is arranged beside the cylinder body of the tensioning cylinder II and used for limiting the swing amplitude of the tensioning cylinder II.

Preferably, the hook structure comprises a drag hook, a rotating shaft is arranged at the end part of a telescopic rod of the tensioning oil cylinder II, and the drag hook is sleeved on the rotating shaft through a torsion spring, so that the drag hook can rotate around the rotating shaft; the end part of the long semi-circle elastic hoop is provided with a hoop shaft pin which can be hooked by the draw hook; an ejector block is fixed on the draw hook, and the ejector block is matched with a stop pin fixed on the flexible hoop support, so that the draw hook rotates.

Preferably, the end of the long half-cycle elastic hoop is connected with the hoop bracket through a releasable and clamping hoop fixing device.

Preferably, the short half-cycle elastic hoop and the long half-cycle elastic hoop have the same structure and comprise a plurality of hoop blocks which are connected in series through a steel wire rope, and two adjacent hoop blocks are mutually locked through an elastic locking mechanism; after the first tensioning oil cylinder and the second tensioning oil cylinder or the jacking oil cylinder pulls the steel wire rope, a gap delta is formed between every two adjacent hoop blocks by using the elastic locking mechanism, and the gap delta is changed under the action of the first tensioning oil cylinder and the second tensioning oil cylinder or the jacking oil cylinder, so that the aim of changing the roundness is fulfilled.

Preferably, each hoop block is provided with rubber on one side facing the wind driven generator tower.

Preferably, the elastic locking mechanism comprises a bolt, a spherical washer, a spring and a nut; the bolts penetrate through the two adjacent hoop blocks and are locked through the nuts; a spherical washer and a spring are sleeved outside the bolt; the spherical washer is abutted against the hoop block; the spring is positioned between the spherical washer and the nut, and two ends of the spring are respectively abutted against the spherical washer and the nut.

The utility model provides a pair of land aerogenerator installation, maintenance hoist possess transport facility, on-the-spot installation time is short, convenient operation, maintenance low cost, to advantages such as domestic existing aerogenerator universality height. The utility model discloses can be used for each topography, various model land aerogenerator's installation, maintenance work.

Drawings

Fig. 1A is a schematic view (front view) of an overall structure of a crane for installing and maintaining a land wind turbine generator provided by the present invention before a telescopic tower column is raised;

fig. 1B is a schematic general structural diagram (top view) of a crane for installing and maintaining a land wind turbine provided by the present invention before the telescopic tower column is turned up;

fig. 1C is a schematic view (front view) of the general structure of the crane for installing and maintaining the onshore wind turbine provided by the present invention after the telescopic tower column is turned up and before the telescopic tower column is lifted;

fig. 1D is a schematic view (front view) of the general structure of the crane for installing and maintaining the onshore wind turbine generator, which is provided by the present invention, after the telescopic tower column is lifted in place;

FIG. 2 is an enlarged partial view of portion B of FIG. 1C;

fig. 3A is a schematic structural view of the guide hoop in a closed state;

FIG. 3B is an enlarged view of a portion A of FIG. 3A;

fig. 4A is a schematic structural diagram (closed state) of the flexible hoop;

fig. 4B is a schematic structural view (open state) of the flexible hoop;

FIG. 5 is a schematic view of a hook structure;

FIG. 6 is a schematic view of the hoop fixture;

FIG. 7 is a partial schematic view of portion C of FIG. 4A;

FIG. 8A is a schematic structural view of the elastic hoop when not under tension;

FIG. 8B isbase:Sub>A cross-sectional view taken along line A-A of FIG. 8A;

fig. 9 is a schematic structural view of the elastic hoop after being subjected to tension;

fig. 10 is a schematic structural view of the elastic locking mechanism.

Detailed Description

The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.

As shown in fig. 1A to fig. 1D and fig. 2, the utility model discloses an installation and maintenance crane for land wind driven generator includes a telescopic tower column 5, and the bottom section of the telescopic tower column 5 is articulated on the trailer 1. The trailer 1 is provided with a tower column turning oil cylinder 3, the cylinder body of the tower column turning oil cylinder 3 is hinged with the trailer 1, the telescopic end is hinged with a telescopic tower column 5, and the telescopic tower column 5 is driven by the tower column turning oil cylinder 3 to change between a horizontal state and a vertical state. During transportation, the telescopic tower column 5 is in a horizontal state and is horizontally laid on the trailer 1; when the telescopic tower column lifting device works, the tower column lifting oil cylinder 3 jacks up the telescopic tower column 5, so that the telescopic tower column 5 is in a vertical state. Carry the transportation by trailer 1 the utility model discloses, compare current large-scale crawler crane and controlled volume and quality, it is more convenient to transport, overcomes complicated topography can the reinforce.

The top end of the top section of the telescopic tower column 5 is provided with a boom 6, a balance arm 7 and an oil cylinder 10, the telescopic end of the oil cylinder 10 is hinged with the balance arm 7, and the balance arm 7 is hinged with the boom 6. During transportation, the extending arm 6 and the balance arm 7 are positioned on the same straight line; when the lifting device works, the oil cylinder 10 turns up the balance arm 7, so that the balance arm 7 is perpendicular to the extending arm 6.

After the telescopic tower column 5 is jacked in place, a tail rope synchronous rotating device 9 is fixed at the bottom section of the telescopic tower column 5, and a tail rope 11 led out from the boom 6 is connected with the tail rope synchronous rotating device 9.

It should be noted that the boom 6, the balance arm 7, the cylinder 10, the tail rope synchronous rotating device 9 and the tail rope 11 are conventional components well known to those skilled in the art, and will not be described herein.

A guiding hoop 2 and a flexible hoop 4 are installed on the second section of the telescopic tower column 5.

The state of the guide hoop 2 can be switched between a closed state and an open state. The guide hoop 2 in the opening state is provided with a guide hoop opening, after the guide hoop opening is aligned with the wind driven generator tower, the wind driven generator tower is placed in the guide hoop 2, finally, the state of the guide hoop 2 is switched to the closing state, and the guide hoop 2 surrounds the wind driven generator tower while the guide hoop opening is closed. The utility model provides an among the maintenance hoist jacking process, because the aerogenerator pylon is the toper structure, aerogenerator pylon diameter is by supreme gradual reduction down, and the direction staple bolt 2 that is located 5 top festivals of flexible pylon encircles the aerogenerator pylon all the time under hydraulic system's effect, makes flexible pylon 5 and aerogenerator pylon keep parallel, keeps the utility model discloses the stability of jacking process after upset to vertical state.

As shown in fig. 3A and 3B, the guide hoop 2 includes a guide hoop support 2-2, and the guide hoop support 2-2 has a mounting hole for mounting the guide hoop on the telescopic tower 5. The guide hoop support 2-2 is provided with a front side hydraulic subsystem and a rear side hydraulic subsystem, and the front side hydraulic subsystem and the rear side hydraulic subsystem are respectively connected with one end of the front side hoop bracket 2-3-1 and one end of the rear side hoop bracket 2-3-2. A gap is formed between the other end of the front hoop bracket 2-3-1 and the other end of the rear hoop bracket 2-3-2, and the gap is a guide hoop opening. The other ends of the front hoop bracket 2-3-1 and the rear hoop bracket 2-3-2 are also provided with locking devices 2-4 driven by opening and closing oil cylinders 2-7. The locking device 2-4 is driven by the opening and closing oil cylinder 2-7 to open or close a gap between the front hoop bracket 2-3-1 and the other end of the rear hoop bracket 2-3-2, so that the guide hoop 2 is switched between an open state and a closed state. In the embodiment, the rear end of the locking device 2-4 is hinged with the rear hoop bracket 2-3-2, and the opening and closing oil cylinder 2-7 is also fixed on the rear hoop bracket 2-3-2. The output end of the opening and closing oil cylinder 2-7 is connected with the locking device 2-4. The front end of the locking device 2-4 is driven by the opening and closing oil cylinder 2-7 to be locked with the hoop bracket 2-3-1 at the front side, so that the guide hoop 2 is in a closed state; meanwhile, the front end of the locking device 2-4 is driven by the opening and closing oil cylinder 2-7 to be separated from the hoop bracket 2-3-1 at the front side, so that the guide hoop 2 is in an opening state. The locking device 2-4, the front side hydraulic subsystem and the rear side hydraulic subsystem are simultaneously tensioned, so that the front side hoop bracket 2-3-1 and the rear side hoop bracket 2-3-2 are deformed. The deformed front side hoop bracket 2-3-1 and the rear side hoop bracket 2-3-2 extrude the wind driven generator tower frame with set pressure, so that the front side hoop bracket 2-3-1 and the rear side hoop bracket 2-3-2 can always encircle the outside of the wind driven generator tower frame under the condition that the diameter of the wind driven generator tower frame is changed. The guide wheels 2-5 are arranged on the inner sides of the front hoop bracket 2-3-1 and the rear hoop bracket 2-3-2, and after the guide hoop 2 encircles the wind driven generator tower, the guide wheels 2-5 are tightly attached to the wind driven generator tower, so that a guide effect is achieved. In the embodiment, the front side hydraulic subsystem and the rear side hydraulic subsystem are identical in structure and comprise a hydraulic cylinder 2-1 and a connecting rod device 2-6, the hydraulic cylinder 2-1 is fixed on the guide hoop support 2-2, and the connecting rod device 2-6 drives the front side hoop bracket 2-3-1 or the rear side hoop bracket 2-3-2 to deform.

The state of the flexible hoop 4 can be switched between a closed state and an open state. The flexible hoop 4 in the opening state is provided with a flexible hoop opening, after the flexible hoop opening is aligned with the wind driven generator tower, the wind driven generator tower is placed in the flexible hoop 4, finally, the state of the flexible hoop 4 is switched to the closing state, and the flexible hoop 4 surrounds the wind driven generator tower while the flexible hoop opening is closed. If the flexible anchor ear 4 keeps the maximum design roundness, no friction force exists between the flexible anchor ear 4 and the wind driven generator tower. When the roundness of the flexible hoop 4 is reduced to be attached to the wind driven generator tower, enough friction force is generated between the flexible hoop and the wind driven generator tower so as to support the operation of the maintenance crane.

As shown in fig. 4A and 4B, the flexible hoop 4 includes a flexible hoop support 4-1 having a flexible hoop opening, and the flexible hoop support 4-1 has a mounting hole for mounting the flexible hoop support on the telescopic tower 5. The flexible hoop support 4-1 is connected with the openable flexible hoop bracket 4-12, and the opening and closing oil cylinder 4-13 drives the flexible hoop bracket 4-12 to open and close. When the flexible hoop brackets 4-12 are opened, the openings of the flexible hoops are exposed outside, and the flexible hoops 4 are in an opened state; when the flexible hoop brackets 4-12 are closed, the flexible hoop openings are closed, and the flexible hoops 4 are in a closed state.

The flexible hoop support 4-1 is provided with a jacking oil cylinder 4-2, and the jacking oil cylinder 4-2 is connected with the guide frame 4-4. One end of each of the two support rods 4-24 is hinged with the guide frame 4-4, and the other end is respectively connected with the two ends of the short half-cycle elastic hoop 4-9. The jacking oil cylinder 4-2 drives the short half-cycle elastic hoop 4-9 to extend and shorten through the guide frame 4-4 and the support rod 4-24.

The inner side of the flexible hoop bracket 4-12 is provided with a long semi-circle elastic hoop 4-10, the long semi-circle elastic hoop 4-10 is fixedly connected with a telescopic supporting rod 4-11, and the telescopic supporting rod 4-11 is positioned at the center of the long semi-circle elastic hoop 4-10. The telescopic supporting rods 4-11 are fixed on the flexible hoop brackets 4-12. One end of the long semi-circle elastic hoop 4-10 is connected with the telescopic rod of the tensioning oil cylinder I4-3-1, and the other end of the long semi-circle elastic hoop 4-10 is detachably connected with the telescopic rod of the tensioning oil cylinder II 4-3-2 through a hook structure. The long half-cycle elastic hoop 4-10 is extended and shortened through the tensioning oil cylinder I4-3-1 and the tensioning oil cylinder II 4-3-2. The cylinder bodies of the first tensioning oil cylinder 4-3-1 and the second tensioning oil cylinder 4-3-2 are fixed on the flexible hoop support 4-1 and hinged with the flexible hoop support 4-1. Two ends of the return tension spring 4-5 are respectively connected and fixed with the cylinder body of the first tensioning oil cylinder 4-3-1 or the second tensioning oil cylinder 4-3-2 and the flexible hoop support 4-1, so that the first tensioning oil cylinder 4-3-1 and the second tensioning oil cylinder 4-3-2 can be quickly reset after swinging. And a stop block 4-6 is arranged beside the cylinder body of the tensioning cylinder II 4-3-2 and used for limiting the swing amplitude of the tensioning cylinder II 4-3-2.

The short half-cycle elastic hoop 4-9 is matched with the long half-cycle elastic hoop 4-10 to form an equivalent whole circle encircling the wind driven generator tower, and after the short half-cycle elastic hoop 4-9 and the long half-cycle elastic hoop 4-10 are correspondingly extended and shortened, the roundness of the equivalent whole circle is changed.

Referring to fig. 5, the hook structure comprises a drag hook 4-7, a rotating shaft is arranged at the end part of a telescopic rod for tensioning the second oil cylinder 4-3-2, and the drag hook 4-7 is sleeved on the rotating shaft through a torsion spring 4-22, so that the drag hook 4-7 can rotate around the rotating shaft. The end part of the long semi-circle elastic hoop 4-10 is provided with a hoop shaft pin 4-23 which can be hooked by the draw hook 4-7. An ejector block 4-25 is fixed on the draw hook 4-7, and the ejector block 4-25 is matched with a stop pin 4-21 fixed on the flexible hoop support 4-1 so as to rotate the draw hook 4-7. When the end part of the long semi-circle elastic hoop 4-10 needs to be combined with the tensioning oil cylinder II 4-3-2, the telescopic rod of the tensioning oil cylinder II 4-3-2 extends to the top block 4-25 to abut against the stop pin 4-21, and at the moment, the telescopic rod of the tensioning oil cylinder II 4-3-2 continues to extend by a micro delta, so that the top block 4-25 drives the draw hook 4-7 to rotate by an angle alpha. And then, the telescopic rod of the tensioning oil cylinder II 4-3-2 contracts by a small amount delta, and the hoop shaft pin 4-23 is hooked by the drag hook 4-7 after the drag hook rotates by a rotation angle alpha. When the end part of the long half-cycle elastic hoop 4-10 needs to be separated from the tensioning oil cylinder II 4-3-2, the telescopic rod of the tensioning oil cylinder II 4-3-2 extends by a slight amount delta, so that the top block 4-25 drives the draw hook 4-7 to rotate by an angle alpha, and at the moment, the flexible hoop bracket 4-12 is opened, so that the end part of the long half-cycle elastic hoop 4-10 is separated from the tensioning oil cylinder II 4-3-2.

Referring to fig. 6, the ends of the long half-cycle resilient hoops 4-10 are connected to the flexible hoop brackets 4-12 by a releasable and clampable hoop fixture 4-8. The hoop fixing devices 4-8 are outsourcing members, and the specific structure thereof is not described in detail. When the flexible hoop bracket 4-12 is opened, the other end of the long half-cycle elastic hoop 4-10 is separated from the telescopic rod of the tensioning oil cylinder II 4-3-2, and at the moment, the hoop fixing device 4-8 clamps the end part of the long half-cycle elastic hoop 4-10. When the flexible hoop bracket 4-12 is closed, the other end of the long half-cycle elastic hoop 4-10 is combined with the telescopic rod of the tensioning oil cylinder II 4-3-2, and at the moment, the hoop fixing device 4-8 loosens the end part of the long half-cycle elastic hoop 4-10.

Referring to fig. 8A, 8B and 9, the short half-cycle elastic anchor ear 4-9 and the long half-cycle elastic anchor ear 4-10 have the same structure, and comprise a plurality of hoop blocks 4-14 connected in series through steel wire ropes 4-15, and two adjacent hoop blocks 4-14 are locked with each other through an elastic locking mechanism. After a steel wire rope 4-15 is pulled through the tensioning oil cylinder I4-3-1 and the tensioning oil cylinder II 4-3-2 or through the jacking oil cylinder 4-2, a gap delta is formed between two adjacent hoop blocks 4-14 by using the elastic locking mechanism, and the gap delta is changed under the action of the tensioning oil cylinder I4-3-1, the tensioning oil cylinder II 4-3-2 or the jacking oil cylinder 4-2, so that the aim of changing the roundness is fulfilled.

And rubber 4-16 is arranged on one side of each anchor ear 4-14, which faces the wind driven generator tower, and the friction between the short half-cycle elastic anchor ear 4-9 or the long half-cycle elastic anchor ear 4-10 and the wind driven generator tower is increased by utilizing the rubber 4-16.

In this embodiment, the resilient locking mechanism includes a bolt 4-17, a spherical washer 4-18, a spring 4-19, and a nut 4-20. The bolts 4-17 are arranged on the two adjacent hoop blocks 4-14 in a penetrating way and are locked by the nuts 4-20. The bolts 4-17 are sleeved with spherical washers 4-18 and springs 4-19, the spherical washers 4-18 are abutted against the hoop blocks 4-14, the springs 4-19 are positioned between the spherical washers 4-18 and the nuts 4-20, and two ends of the springs 4-19 are abutted against the spherical washers 4-18 and the nuts 4-20 respectively. After the steel wire rope 4-15 is pulled through the tensioning oil cylinder I4-3-1 and the tensioning oil cylinder II 4-3-2 or through the jacking oil cylinder 4-2, the spring 4-19 is stressed and compressed, and therefore the gap delta is formed. When the external force F acting on the steel wire rope 4-15 by the tensioning oil cylinder I4-3-1 and the tensioning oil cylinder II 4-3-2 or the jacking oil cylinder 4-2 is removed, the spring 4-19 is restored to the original shape, the gap delta disappears, and the roundness of the equivalent full circle reaches the maximum designed roundness.

During operation, the tail of the trailer 1 is aligned with the wind driven generator tower and stops at a specified position. The trailer 1 is equipped with four hydraulic support frames 8, and 4 landing legs 8 of trailer 1 are stretched out, jack-up automobile body, and it is unsettled to jack-up the trailer 1. The tower column turning cylinder 3 jacks up the telescopic tower column 5. The guide hoop 2 and the flexible hoop 4 in the opening state slowly draw close to the wind driven generator tower, and after the guide hoop 2 is in place, the guide hoop is switched to the closing state and tightly holds the wind driven generator tower. And lifting the oil cylinder 10, erecting the balance arm 7, and then rotating the extending arm 6, wherein the extending arm 6 outwards has the same direction as the trailer 1. The telescopic tower column 5 starts to be jacked, the guide hoop 4 is gradually folded along the conical wind driven generator tower to guide, and the jacking process of the telescopic tower column 5 is ensured to be parallel to the wind driven generator tower. After the crane is jacked to a preset position, the flexible anchor ear 4 is switched to a closed state, and the tower of the wind driven generator is tightly held to generate enough friction force so that the crane can work reliably. The oil cylinder 10 is contracted, and the balance arm 7 is laid flat. The tail rope 11 is mounted to the tail rope synchronous rotating device 9, and the crane can work.

The utility model provides an advantage of land aerogenerator installation, maintenance hoist is the utility model discloses the advantage of device is that the transportation is convenient, self equipment is simple labour saving and time saving, overcome complicated topography can reinforce, low cost, extensive applicability, safe and reliable.

Claims (9)

1. A crane for installing and maintaining a land wind driven generator is characterized by comprising a telescopic tower column, wherein the bottom section of the telescopic tower column is hinged on a trailer; a tower column turning oil cylinder is arranged on the trailer, and the telescopic tower column is driven to change between a horizontal state and a vertical state through the tower column turning oil cylinder;

the top end of the top section of the telescopic tower column is provided with a cantilever arm, a balance arm and an oil cylinder, the telescopic end of the oil cylinder is hinged with the balance arm, and the balance arm is hinged with the cantilever arm; after the telescopic tower column is jacked in place, a tail rope synchronous rotating device is arranged at the bottom section of the telescopic tower column, and a tail rope led out from the telescopic boom is connected with the tail rope synchronous rotating device;

a guide hoop and a flexible hoop which can be switched between a closed state and an open state are arranged on the second section of the telescopic tower column, when the guide hoop is in the open state, a guide hoop opening of the guide hoop is exposed outside, and when the guide hoop is in the closed state, the guide hoop opening is closed; the guide hoop in a closed state surrounds the outside of the wind driven generator tower, the guide hoop is provided with a hydraulic system, and the extrusion force of the guide hoop on the wind driven generator tower is always kept at a set value through the hydraulic system; in the process of jacking the telescopic tower column, the guide hoop plays a role in guiding;

when the flexible hoop is in an open state, the flexible hoop opening of the flexible hoop is exposed outside, and when the flexible hoop is in a closed state, the flexible hoop opening is closed; the flexible hoop in a closed state surrounds the wind driven generator tower, the flexible hoop has variable roundness, and when the roundness of the flexible hoop is the maximum designed roundness, no friction force exists between the flexible hoop and the wind driven generator tower; the roundness of the flexible hoop is reduced to be attached to the wind driven generator tower until enough friction force is generated between the flexible hoop and the wind driven generator tower so as to support the operation of installing and maintaining the crane of the onshore wind driven generator.

2. The onshore wind turbine installation and maintenance crane of claim 1, wherein the guide hoop comprises a guide hoop bracket fixed on the telescopic tower column; the hydraulic system is arranged on the guide hoop support and comprises a hydraulic subsystem I and a hydraulic subsystem II; the hydraulic subsystem I and the hydraulic subsystem II are respectively connected to one ends of the hoop bracket I and the hoop bracket II; a gap is formed between the other ends of the first hoop bracket and the second hoop bracket, and the gap is a guide hoop opening; the other ends of the first hoop bracket and the second hoop bracket are also provided with locking devices driven by the opening and closing oil cylinders, and the locking devices are driven by the opening and closing oil cylinders to open or close a gap between the first hoop bracket and the other end of the second hoop bracket, so that the state of the guide hoop is switched between an open state and a closed state; the locking device and the hydraulic subsystem are simultaneously tensioned, so that the hoop bracket I and the hoop bracket II are deformed, and the deformed hoop bracket I and the deformed hoop bracket II extrude the wind driven generator tower with set pressure, so that the hoop bracket I and the hoop bracket II can always encircle the outside of the wind driven generator tower under the condition that the diameter of the wind driven generator tower is changed; and guide wheels are arranged on the inner sides of the first hoop bracket and the second hoop bracket, and the guide wheels are tightly attached to the wind driven generator tower after the wind driven generator tower is encircled by the guide hoops, so that a guide effect is achieved.

3. The onshore wind turbine installation and maintenance crane of claim 1, wherein the flexible hoop comprises a flexible hoop bracket having a flexible hoop opening, the flexible hoop bracket being fixedly connected to the telescopic tower; the flexible hoop support is connected with the hoop bracket which can be opened and closed, when the hoop bracket is opened, the opening of the flexible hoop is exposed outside, and the flexible hoop is in an open state; when the hoop bracket is closed, the opening of the flexible hoop is closed, and the flexible hoop is in a closed state;

the flexible hoop support is provided with a jacking oil cylinder, and the jacking oil cylinder is connected with the guide frame; one end of each of the two support rods is hinged with the guide frame, the other end of each of the two support rods is connected with two ends of the short half-cycle elastic hoop, and the jacking oil cylinder drives the short half-cycle elastic hoop to extend and shorten through the guide frame and the support rods;

the inner side of the hoop bracket is provided with a long half-circumference elastic hoop, the long half-circumference elastic hoop is fixedly connected with a telescopic supporting rod, and the telescopic supporting rod is fixed on the hoop bracket; one end of the long semi-circle elastic hoop is connected with the telescopic rod of the first tensioning oil cylinder, and the other end of the long semi-circle elastic hoop is detachably connected with the telescopic rod of the second tensioning oil cylinder through a hook structure; the long half-cycle elastic hoop is extended and shortened through the tensioning oil cylinder I and the tensioning oil cylinder II;

the short half-cycle elastic hoop and the long half-cycle elastic hoop are matched to form an equivalent whole circle surrounding the wind driven generator tower, and after the short half-cycle elastic hoop and the long half-cycle elastic hoop are correspondingly extended and shortened, the roundness of the equivalent whole circle is changed.

4. The crane for installing and repairing the land wind turbine as claimed in claim 3, wherein the first tensioning cylinder and the second tensioning cylinder are fixed on the flexible hoop bracket and hinged to the flexible hoop bracket; two ends of the return tension spring are respectively connected and fixed with the cylinder body of the tensioning oil cylinder I or the tensioning oil cylinder II and the flexible hoop bracket; and a stop block is arranged beside the cylinder body of the tensioning cylinder II and used for limiting the swing amplitude of the tensioning cylinder II.

5. The crane for installing and maintaining the onshore wind turbine generator as claimed in claim 3, wherein the hook structure comprises a drag hook, the end of the telescopic rod of the second tensioning cylinder is provided with a rotating shaft, and the drag hook is sleeved on the rotating shaft through a torsion spring, so that the drag hook can rotate around the rotating shaft; the end part of the long semi-circle elastic hoop is provided with a hoop shaft pin which can be hooked by the draw hook; an ejector block is fixed on the draw hook, and the ejector block is matched with a stop pin fixed on the flexible hoop support, so that the draw hook rotates.

6. A onshore wind turbine installation and maintenance crane as claimed in claim 3, wherein the ends of the long half-cycle elastic hoops are connected to the hoop brackets by a releasable and clamping hoop fixing device.

7. The onshore wind turbine installation and maintenance crane of claim 3, wherein the short half-cycle elastic hoop and the long half-cycle elastic hoop are identical in structure and comprise a plurality of hoop blocks which are connected in series through steel cables, and two adjacent hoop blocks are locked with each other through an elastic locking mechanism; after the steel wire rope is pulled through the tensioning oil cylinder I and the tensioning oil cylinder II or through the jacking oil cylinder, a gap delta is formed between two adjacent hoop blocks by utilizing the elastic locking mechanism, and the gap delta is changed under the action of the tensioning oil cylinder I and the tensioning oil cylinder II or the jacking oil cylinder, so that the aim of changing the roundness is fulfilled.

8. An onshore wind turbine installation and maintenance crane as claimed in claim 7, wherein each hoop block is provided with rubber on the side facing the wind turbine tower.

9. The onshore wind turbine installation and maintenance crane of claim 7, wherein the elastic locking mechanism comprises a bolt, a spherical washer, a spring and a nut; the bolts penetrate through the two adjacent hoop blocks and are locked by the nuts; a spherical washer and a spring are sleeved outside the bolt; the spherical washer is abutted against the hoop block; the spring is positioned between the spherical washer and the nut, and two ends of the spring are respectively abutted against the spherical washer and the nut.

Images