Cleaning device for overflowing mortar outside tower drum of wind power mixing tower and construction method

Abstract

The invention relates to the technical field of wind power mixed tower construction, in particular to a wind power mixed tower tube outer overflowing mortar cleaning device and a construction method.The cleaning device comprises a mounting base detachably mounted on the top edge of a prefabricated tower tube section, and an operation handle is rotationally connected to the mounting base; a positioning seat is installed at the end, located outside the prefabricated tower tube section, of the operation handle, a connecting rod is installed at the bottom of the positioning seat in a suspended mode, and a mortar shovel used for scraping exposed mortar is arranged at the bottom end of the connecting rod. Compared with construction by matching a crane with a hanging frame, the construction is performed on the temporary operation platform in the tower drum, so that safety is ensured, the cost of a large crane is saved and cost is reduced; compared with hanging basket construction, aerial work is reduced, and safety is guaranteed; the cleaning device can use local materials, can be reused and is green and environment-friendly; the cleaning device utilizes the lever principle, saves time and labor and is easy to operate.

Description

Technical Field

[0001] This invention relates to the field of wind power hybrid tower construction technology, and in particular to a device and construction method for cleaning grout overflowing from the outside of a wind power hybrid tower. Background Technology

[0002] With the country's promotion of the new energy field, especially the inherent durability of concrete towers, which can maintain their performance under extreme conditions and have low maintenance costs, the investment cost of concrete towers is lower than that of pure steel towers. In particular, steel hybrid towers, which combine concrete and steel towers, are gradually increasing their share in the ultra-high tower wind power market, and their advantages are becoming more and more obvious.

[0003] The hybrid tower is assembled by stacking O-shaped pipe sections (composed of C-shaped pipe segments) and connecting them with prestressed steel strands to form a whole. Each pipe section is about 4 meters high. Before the upper tower pipe section is installed and lowered, thixotropic mortar or structural adhesive is applied to the top of the lower pipe section. To ensure that the horizontal joints between the pipe sections are filled tightly, the mortar should be applied slightly excessively to ensure that air can be smoothly discharged during the grouting process of the upper pipe section. Generally, overflowing mortar is considered as filling tightly.

[0004] The grout overflowing from inside the tower can be handled by construction workers standing on a temporary operating platform inside the tower. However, the grout overflowing from outside the tower is located approximately 4 meters below the construction workers and is suspended in mid-air, making it impossible to remove directly and affecting the quality of the tower's outer wall. Using a crane with a lifting frame, with construction workers positioned inside the frame for cleaning, is not only highly dangerous due to the height of the work but also incurs significant costs for large machinery. Furthermore, using a hanging basket method is prone to swaying at height, posing a safety risk to personnel. Summary of the Invention

[0005] In order to solve the problems existing in the prior art, the present invention provides a device and construction method for cleaning grout overflow from the outside of a wind power hybrid tower.

[0006] In a first aspect, the present invention provides a device for cleaning slurry overflow from the outside of a wind power hybrid tower, comprising a mounting base detachably installed on the top edge of a precast tower section, an operating handle rotatably connected to the mounting base, a positioning seat installed at one end of the operating handle located outside the precast tower section, a connecting rod suspended at the bottom of the positioning seat, and a shovel for scraping out the exposed slurry at the bottom end of the connecting rod.

[0007] By adopting the above technical solutions, compared with using cranes and suspended frames for construction, construction can be carried out on a temporary operating platform inside the tower, ensuring safety, saving the cost of large cranes, and reducing costs; compared with using suspended baskets for construction, it reduces high-altitude work and ensures safety; the cleaning device can use locally sourced materials, can be reused, and is green and environmentally friendly; the cleaning device uses the lever principle, which saves time and effort and is easy to operate.

[0008] Preferably, the mounting base includes a U-shaped base clamp that can be detachably fastened to the top edge of the precast tower tube section, and the operating handle is hinged and supported on the top of the U-shaped base clamp.

[0009] Preferably, the two side plates of the U-shaped base clamp are threaded with locking screws for abutting against the inner or outer wall of the precast tower pipe section.

[0010] Preferably, the side plate of the U-shaped base clamp has holes and a locking nut is fixed to the corresponding position on the outer wall of the side plate, and the locking screw is threaded into the locking nut.

[0011] Preferably, two ear plates are vertically fixed to the top plate of the U-shaped base clamp, and a rotating shaft is rotatably connected between the two ear plates. The operating handle is vertically fixed to the rotating shaft.

[0012] Preferably, the positioning seat includes a sleeve that is slidably sleeved on the outside of the operating handle, and a positioning screw for abutting the operating handle is threaded on the sleeve.

[0013] Preferably, the connecting rod and the sleeve are flexibly or rigidly connected.

[0014] Preferably, when the connecting rod and the sleeve are flexibly connected, a hook is fixedly installed at the top of the connecting rod, and a hanging ear plate is fixedly connected to the bottom of the sleeve, with the hook hooked into the hole of the hanging ear plate; when the connecting rod and the sleeve are rigidly connected, a connecting plate is fixedly connected to the top of the connecting rod, and a hanging plate is fixedly connected to the bottom of the sleeve, with the connecting plate connected to the hanging plate by bolts.

[0015] Secondly, the present invention provides a method for cleaning grout overflowing from the exterior of a wind turbine hybrid tower, comprising the following steps: S1. Apply mortar to the top surface of the lower precast tower section, and then place the upper section onto the lower section. S2. Fix the mounting base to the top edge of the upper pipe section, so that the connecting rod and ash shovel are suspended outside the upper pipe section; S3. The construction worker stands on the temporary operating platform inside the tower, holds the connecting rod with his hand to make the mortar shovel fit tightly against the outer wall of the pipe section, and at the same time presses the operating handle downward. Using the lever principle, the connecting rod and mortar shovel are lifted up to remove the exposed mortar from the bottom up. This is repeated several times to scrape off the exposed mortar on the outside of the pipe section. After the exposed mortar is cleaned, the mounting base is released, the cleaning device is moved to the next position, the mounting base is fixed again, and the above operation is repeated.

[0016] Preferably, when the connecting rod is rigidly connected to the positioning seat, pressing down the operating handle drives the connecting rod and the shovel to lift upwards to chisel the exposed mortar from bottom to top. When the operating handle is pried upwards, it drives the connecting rod and the shovel to chisel and clean the mortar from top to bottom. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the installation of the cleaning device according to an embodiment of the present invention.

[0018] Figure 2 This is a schematic diagram of the cleaning device according to an embodiment of the present invention.

[0019] Figure 3 This is a top view of the mounting base according to an embodiment of the present invention.

[0020] Figure 4 This is a schematic diagram of the connection method between the connecting rod and the positioning seat according to an embodiment of the present invention.

[0021] Figure 5 This is a schematic diagram of a second connection method between the connecting rod and the positioning seat according to an embodiment of the present invention.

[0022] Explanation of reference numerals in the attached drawings: 1. Precast tower section; 2. Temporary operating platform inside the tower; 3. Exposed mortar; 4. Cleaning device; 41. Mounting base; 411. U-shaped base clamp; 412. Locking nut; 413. Locking screw; 414. Ear plate; 415. Rotating shaft; 42. Operating handle; 43. Positioning seat; 431. Sleeve; 432. Positioning screw; 44. Connecting rod; 441. Hook; 442. Connecting plate; 45. Mortar shovel. Detailed Implementation

[0023] The following combination Figures 1-5 The present invention will be described in further detail below.

[0024] This invention discloses a device and construction method for cleaning grout overflow from the exterior of a wind turbine hybrid tower. A temporary operating platform 2 is erected inside the precast tower section 1 for construction personnel to stand and operate. Thixotropic mortar is applied between two adjacent precast tower sections 1. The thixotropic mortar is squeezed out to the outside of the precast tower section 1, forming exposed grout 3. The cleaning device 4 is detachably installed on the upper precast tower section 1.

[0025] The cleaning device 4 includes a mounting base 41 that can be detachably installed on the top edge of the precast tower tube section 1. An operating handle 42, which is used as a lever, is hinged on the mounting base 41. A positioning seat 43 that can move axially along the operating handle 42 is provided at one end of the operating handle 42 located outside the precast tower tube section 1. A connecting rod 44 is suspended and installed below the positioning seat 43. The connecting rod 44 can be made of angle steel, steel pipe or square tube. A shovel 45 for scraping out exposed mortar 3 is welded and fixed at the bottom end of the connecting rod 44. The shovel 45 is made of 10mm thick steel plate and matches the arc shape of the tube section.

[0026] Mounting base 41 includes a U-shaped base clamp 411, which is formed by welding three steel plates into an inverted "U" shape. The steel plates are 10-20mm thick and the length and width are controlled between 300-500mm for easy operation. The width of the top plate is 30-50mm larger than the thickness of the precast tower pipe section 1. The shape of the U-shaped base clamp 411 is adapted to the precast tower pipe section 1. Two parallel holes are opened on the two side plates of the U-shaped base clamp 411, and locking nuts 412 are welded to the corresponding holes on the outer wall of the side plates. Locking screws 413 are installed in the internal threads of the locking nuts 412. The locking screws 413 are used to press against the inner or outer wall of the precast tower pipe section 1 to firmly fix the entire mounting base 41 on the top edge of the precast tower pipe section 1.

[0027] Two ear plates 414 are vertically fixed to the top surface of the top plate of the U-shaped base clamp 411. A rotating shaft 415 is rotatably installed between the two ear plates 414. The operating handle 42 is long and rod-shaped and is vertically fixed to the rotating shaft 415. The positioning seat 43 includes a sleeve 431 that is slidably sleeved on the outside of the operating handle 42. A positioning screw 432 for pressing against the outer wall of the operating handle 42 is threaded on the sleeve 431.

[0028] The connecting rod 44 and the sleeve 431 can be connected by a hook 441 or a connecting plate 442. When the hook 441 is used, the hook 441 is fixedly installed on the top of the connecting rod 44, and the bottom of the sleeve 431 is fixedly connected to a hanging ear plate. The hook 441 is hooked into the hole of the hanging ear plate. When the connecting plate 442 is used, the connecting plate 442 is fixedly installed on the top of the connecting rod 44, and the bottom of the sleeve 431 is fixedly connected to a hanging plate. The connecting plate 442 is connected to the hanging plate by bolts.

[0029] The method for cleaning overflow mortar from the exterior of a wind turbine hybrid tower according to an embodiment of the present invention includes the following steps: S1. Pipe section placement, specifically including: applying thixotropic mortar to the top surface of the precast tower pipe section 1 located below, and then placing the upper pipe section in place; to ensure that the horizontal joint is filled tightly, first check whether the thickness of the mortar joint layer is sufficient to ensure that the horizontal joint is without gaps; when the upper pipe section is lifted to about 50cm above the lower pipe section, the construction personnel stand on the temporary operating platform 2 inside the tower and ensure that the upper pipe section is in the correct position in the air so as to correctly position the pipe section, and then slowly lower the lifted pipe section and use the positioning rod to guide it to the correct final position; when the pipe section is placed, carefully check the gaps. If any looseness is found, use a trowel to remove the excess material from the joint surface and refill the gaps to make the joint surface flat and uniform.

[0030] S2. Installation of cleaning device 4, specifically including: after the upper pipe section is seated, mortar may overflow inside and outside the pipe section. The mortar overflowing horizontally in the inside of the pipe section is cleaned with a mud shovel, and the mortar outside the pipe section is cleaned with cleaning device 4; first, the U-shaped base clamp 411 is fastened on the top edge of the upper pipe section, and the locking screw 413 is tightened to be pressed against the inner and outer walls of the pipe section. The operating handle 42 is rotated with the rotating shaft 415 as the fulcrum. The position of the sleeve 431 on the operating handle 42 is adjusted and the positioning screw 432 is tightened to fix it. The connecting rod 44 and the sleeve 431 are connected by a flexible hinge such as hook 441 or a bolt rigid connection such as connecting plate 442.

[0031] S3. Cleaning of exposed mortar 3, specifically including: holding the connecting rod 44 with your hand so that the mortar scraper 45 below it is in close contact with the outer wall of the pipe section, while pressing the operating handle 42 downwards, using the rotating shaft 415 as a fulcrum, driving the connecting rod 44 and mortar scraper 45 upwards to remove the exposed mortar 3 from bottom to top, repeating multiple times to scrape off the exposed mortar 3 on the outside of the pipe section; after the exposed mortar 3 is cleaned here, loosen the locking screw 413, move the cleaning device 4 to the next position, and then tighten the locking screw 413, repeating the above operation to clean the exposed mortar 3 on the entire outer wall of the pipe section.

[0032] When the connecting rod 44 and the sleeve 431 are rigidly connected by bolts, pressing down the operating handle 42 will drive the connecting rod 44 and the ash shovel 45 to lift upwards and chip away at the exposed mortar 3 from bottom to top; when the operating handle 42 is pried upwards, the connecting rod 44 and the ash shovel 45 can be driven to chip away and clean the mortar from top to bottom.

[0033] The wind turbine hybrid tower external overflow mortar cleaning device and construction method of the present invention have the following advantages: 1. Compared with using a crane in conjunction with a lifting frame for construction, construction is carried out on a temporary operating platform 2 inside the tower, which ensures safety, saves the cost of large cranes, and reduces costs; 2. Compared with suspended platform construction, it reduces high-altitude work and ensures safety; 3. The cleaning device 4 can use locally sourced materials, which can be reused and is environmentally friendly; 4. The cleaning device 4 utilizes the lever principle, saving time and effort, and is easy to operate.

[0034] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A device for cleaning overflow slurry from the outside of a wind turbine hybrid tower, characterized in that: It includes a mounting base (41) that can be detachably installed on the top edge of the precast tower pipe section (1). An operating handle (42) is rotatably connected to the mounting base (41). A positioning seat (43) is installed at one end of the operating handle (42) located outside the precast tower pipe section (1). A connecting rod (44) is suspended at the bottom of the positioning seat (43). A shovel (45) for scraping out exposed mortar (3) is provided at the bottom end of the connecting rod (44).

2. The wind turbine hybrid tower external overflow slurry cleaning device according to claim 1, characterized in that: The mounting base (41) includes a U-shaped base clamp (411) that is detachably fastened to the top edge of the precast tower pipe section (1), and an operating handle (42) is hinged to the top of the U-shaped base clamp (411).

3. The wind turbine hybrid tower external overflow slurry cleaning device according to claim 2, characterized in that: The two side plates of the U-shaped base clamp (411) are threaded with locking screws (413) for abutting against the inner or outer wall of the prefabricated tower pipe section (1).

4. The wind turbine hybrid tower external overflow slurry cleaning device according to claim 3, characterized in that: The side plate of the U-shaped base clamp (411) has holes and a locking nut (412) is fixed to the corresponding hole on the outer wall of the side plate. The locking screw (413) is threaded into the locking nut (412).

5. The wind turbine hybrid tower external overflow slurry cleaning device according to claim 2, characterized in that: Two ear plates (414) are vertically fixed to the top plate of the U-shaped base clamp (411), and a rotating shaft (415) is rotatably connected between the two ear plates (414). The operating handle (42) is vertically fixed to the rotating shaft (415).

6. The wind turbine hybrid tower external overflow slurry cleaning device according to claim 1, characterized in that: The positioning seat (43) includes a sleeve (431) that is slidably sleeved on the outside of the operating handle (42), and a positioning screw (432) for abutting the operating handle (42) is threaded on the sleeve (431).

7. The wind turbine hybrid tower external overflow slurry cleaning device according to claim 6, characterized in that: The connecting rod (44) is flexibly or rigidly connected to the sleeve (431).

8. The wind turbine hybrid tower external overflow slurry cleaning device according to claim 7, characterized in that: When the connecting rod (44) is flexibly connected to the sleeve (431), a hook (441) is fixedly installed on the top of the connecting rod (44), and a hanging ear plate is fixedly connected to the bottom of the sleeve (431). The hook (441) is hooked into the hole of the hanging ear plate. When the connecting rod (44) is rigidly connected to the sleeve (431), a connecting plate (442) is fixedly connected to the top of the connecting rod (44), and a hanging plate is fixedly connected to the bottom of the sleeve (431). The connecting plate (442) is connected to the hanging plate by bolts.

9. A construction method for a wind power hybrid tower external overflow mortar cleaning device as described in any one of claims 1-8, characterized in that, Includes the following steps: S1. Apply mortar to the top surface of the lower precast tower section (1), and then place the upper section on the lower section. S2. Fix the mounting base (41) to the top edge of the upper pipe section, so that the connecting rod (44) and the ash shovel (45) are suspended outside the upper pipe section; S3. The construction worker stands on the temporary operating platform (2) inside the tower, holds the connecting rod (44) with his hand, and makes the shovel (45) stick to the outer wall of the pipe section. At the same time, he presses the operating handle (42) down and uses the lever principle to drive the connecting rod (44) and the shovel (45) to lift up and remove the exposed mortar (3) from the bottom up. Repeat this several times to scrape off the exposed mortar (3) outside the pipe section. After the exposed mortar (3) is cleaned, release the mounting seat (41), move the cleaning device (4) to the next position, fix the mounting seat (41) again, and repeat the above operation.

10. The construction method according to claim 9, characterized in that: When the connecting rod (44) is rigidly connected to the positioning seat (43), the operating handle (42) is pressed down to drive the connecting rod (44) and the ash shovel (45) to be lifted up to chip away the exposed mortar (3) from bottom to top. When the operating handle (42) is pried up, the connecting rod (44) and the ash shovel (45) are driven to chip away and clean the mortar from top to bottom.

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