Automatic paint spraying device for inner surface of wind power tower drum

Abstract

The invention relates to the technical field of wind power tower drum paint spraying, in particular to a wind power tower drum inner surface automatic paint spraying device which comprises a walking machine and a paint spraying system, and the paint spraying system comprises a spraying pipe and a spraying head; the rotating cover is rotationally arranged at the end of the spraying pipe in a sleeving mode, an opening is formed in the top of the rotating cover, the diameter of the rotating cover is gradually increased from top to bottom, the spraying head is located in the rotating cover, and the rotating cover rotates anticlockwise around the central axis of the rotating cover; the multiple blades are arranged in the circumferential direction and connected to the top of the inner side wall of the rotating cover, and the front blade inclines rightwards from top to bottom. The plurality of ventilation holes are arranged in the circumferential direction and are formed in the bottom surface of the rotating cover; one end of the paint pumping pipe communicates with a paint pumping system assembled on the walking machine, and the other end of the paint pumping pipe communicates with the bottom of the inner cavity of the rotating cover through a connecting piece. The paint flying problem in the spraying process can be effectively solved, flying paint particles are collected, and the spraying effect of the spraying device is improved.

Description

Technical Field

[0001] The invention relates to the technical field of wind power tower painting, and in particular to an automatic painting device for the inner surface of a wind power tower. Background Art

[0002] Wind turbine towers are an important part of wind turbines. They are usually made of steel and are easily corroded when exposed to harsh environments such as moisture and salt spray for a long time. The inner surface of the tower needs to be painted to isolate the steel from the external environment and effectively prevent corrosion, thereby extending the service life of the tower and reducing maintenance and replacement costs.

[0003] Reference Figure 1 When spraying paint, the wind turbine tower is placed horizontally, and the spraying robot moves inside the tower and sprays the inner surface of the tower. The spraying robot consists of a walking machine and a painting system. The walking machine can adapt to the curved surface of the inner wall of the tower and move stably along the axial direction of the tower; the painting system uses an air spray gun or a high-pressure airless spray gun. The high-pressure airless spray gun pressurizes the paint through a high-pressure pump, and then sprays it out through a nozzle; the air spray gun atomizes and sprays the paint through compressed air.

[0004] During the spraying process, there is a situation where the paint fails to effectively adhere to the surface of the workpiece after atomization, and the atomized paint floats in the air or falls on non-target areas. This phenomenon is called flying paint. Flying paint not only causes waste of paint, but also pollutes the environment, affects the spraying quality, and harms the health of operators.

[0005] At present, in addition to reducing the generation of flying paint by optimizing the spraying process, the problem of flying paint can also be solved by using a water curtain spray room and setting up an exhaust filtration system. Among them, the water curtain spray room captures flying paint particles through a water curtain, and requires continuous water supply to maintain the water curtain, resulting in a large consumption of water resources. The water after capturing the flying paint will contain paint particles and chemicals, forming wastewater. The wastewater needs to be treated before it can be discharged, which increases the treatment cost and environmental burden. The equipment maintenance is complicated. The water curtain will increase the humidity of the environment, which may affect the drying effect of the paint and the coating quality. It is suitable for spraying operations in fixed places, but not suitable for mobile or outdoor spraying operations. The exhaust filtration system separates and collects flying paint particles from the air through exhaust and filtration devices. After long-term use, the filter material may be blocked, resulting in a decrease in the filtration effect. The exhaust system needs to run continuously to maintain the negative pressure environment inside the tower, with high energy consumption and noise during operation. The exhaust system may also change the air flow distribution in the spraying environment, affecting the spraying effect.

[0006] Therefore, there is an urgent need for an automatic spray painting device for the inner surface of a wind turbine tower, which can stably and comprehensively spray the inner surface of the wind turbine tower while effectively solving the problem of flying paint. Summary of the invention

[0007] In view of this, the present invention provides an automatic painting device for the inner surface of a wind turbine tower, aiming to solve the technical problem that the existing technology has an unsatisfactory effect in solving the problem of paint flying during the painting process.

[0008] In order to solve the above technical problems, the present invention provides an automatic painting device for the inner surface of a wind turbine tower, which adopts the following technical solutions: an automatic painting device for the inner surface of a wind turbine tower, comprising a walking machine and a painting system, the painting system comprising a spray pipe mounted on the walking machine, the end of the spray pipe being connected to a spray head; a rotating cover, which is rotatably sleeved on the end of the spray pipe, the top of the rotating cover is provided with an opening, the diameter of the rotating cover gradually increases from top to bottom, and the spray head is located inside the rotating cover; a driving member, which is arranged on the spray pipe and is used to drive the rotating cover to rotate counterclockwise around its own central axis; a plurality of blades, which are arranged circumferentially and connected to the top of the inner side wall of the rotating cover, and the blades located in the front are arranged to be inclined to the right from top to bottom; a plurality of ventilation holes, which are arranged circumferentially and opened on the bottom surface of the rotating cover; a paint extraction pipe, one end of which is connected to the paint extraction system mounted on the walking machine, and the other end is connected to the bottom of the inner cavity of the rotating cover through a connecting member.

[0009] By adopting the above technical solution, the spray head sprays paint toward the inner surface of the tower. During the spraying process, the driving member drives the rotating cover to rotate counterclockwise around its own central axis, and the blades rotate synchronously with the rotating cover. Since the blades are tilted and rotate, an aerodynamic effect is generated, so that the gas at the top of the rotating cover has a tendency to flow to the inside of the rotating cover, thereby forming a wind flow from the top of the rotating cover to the inside of the rotating cover, and is restricted by the spraying of the spray head. The wind flow flows along the side wall of the rotating cover to the bottom and flows out through the ventilation holes. The flying paint particles outside the rotating cover enter the inside of the rotating cover with the wind flow. Further, under the action of the centrifugal force of the rotating cover, the flying paint particles are pushed to the side wall of the rotating cover, and then the flying paint particles flow along the side wall of the rotating cover to the bottom of the rotating cover, and are finally collected by the paint extraction tube.

[0010] The spray head is arranged inside the rotating cover, and the high-speed paint particles sprayed by the spray head are sprayed toward the inner surface of the tower through the opening at the top of the rotating cover, and the flying paint particles near the spray head are confined inside the rotating cover; at the same time, the flying paint particles outside the rotating cover enter the inside of the rotating cover under the action of the wind flow and are collected. Since the distance between the opening of the rotating cover and the flying paint particles outside the rotating cover is relatively close, a weak wind flow can drive the flying paint particles outside the rotating cover into the inside of the rotating cover, thereby weakening the negative impact of the wind flow on the spraying effect of the spray head. In addition, when the rotating cover rotates, the flying paint particles are affected by the centrifugal force, and the flying paint particles are pushed to the side wall of the rotating cover, which is convenient for the centralized collection of the flying paint.

[0011] Optionally, a connecting ring 1 is connected to the bottom surface of the interior of the rotating cover, and the connecting ring 1 divides the bottom of the internal cavity of the rotating cover into a paint flow area and an air extraction area.

[0012] By adopting the above technical solution, the connecting ring 1 divides the bottom of the internal cavity of the rotating cover into a paint flow area and an exhaust area, thereby optimizing the flow path and collection efficiency of the flying paint particles inside the rotating cover, reducing the flying paint particles flowing to the outside of the rotating cover through the ventilation holes, and limiting the flying paint particles in the paint flow area to facilitate collection by the paint extraction tube.

[0013] Optionally, the bottom surface of the rotating cover is connected to a connecting ring 2, the diameter of the connecting ring 2 is smaller than the diameter of the connecting ring 1, the ventilation hole is located between the inner wall of the connecting ring 1 and the outer wall of the connecting ring 2, the top of the connecting ring 2 is connected to a connecting ring 1, the outer wall of the connecting ring 1 is connected to the connecting ring 2, the connecting ring 1 is placed horizontally, and the bottom of the connecting ring 2 extends downward to be lower than the top surface of the connecting ring 1.

[0014] By adopting the above technical solution, the connecting ring 2, the connecting ring 1 and the connecting ring 2 cooperate with each other to form a semi-closed cavity, further reducing the possibility of flying paint particles being discharged through the ventilation holes.

[0015] Optionally, a connecting ring three is connected to the bottom surface of the rotating cover, and the outer diameter of the connecting ring three is greater than the outer diameter of the connecting ring two.

[0016] Optionally, the inner wall of the connecting ring three is inclined from top to bottom towards the connecting ring one.

[0017] By adopting the above technical solution, the wind flow is guided, so that the wind flow can flow along the inclined surface of the connecting ring three to between the connecting ring two and the connecting ring one, and be discharged through the ventilation holes.

[0018] Optionally, a detachable filter is provided between the top of the connecting ring three and the bottom of the connecting ring two.

[0019] By adopting the above technical solution, the filter can filter the flying paint particles and avoid the flying paint particles from being discharged through the ventilation holes as much as possible. At the same time, the filter is arranged between the connecting ring 2 and the connecting ring 3, which can avoid the flying paint particles from contaminating the connecting ring 1 as much as possible, and facilitate the subsequent cleaning of the device. The position is convenient for disassembling and replacing the filter to ensure the filtering effect of the filter.

[0020] Optionally, the driving member includes a fixed block rotatably connected to the middle of the bottom surface of the rotating cover, the fixed block is sleeved on the spray pipe, the top surface of the fixed block is hinged with a scraper rod, and the top of the scraper rod can be connected to the upper half of the inner side wall of the rotating cover.

[0021] By adopting the above technical solution, as the rotating cover rotates, the scraper rod cleans the side wall of the rotating cover, reducing the residual flying paint particles on the side wall of the rotating cover, and facilitating the collection of flying paint particles inside the rotating cover.

[0022] Optionally, the center of gravity of the scraper rod is offset, and when the rotating cover is open upward, the scraper rod is connected to the inner side wall of the rotating cover, and when the rotating cover is open downward, the scraper rod is separated from the inner side wall of the rotating cover.

[0023] By adopting the above technical solution, the center of gravity of the scraper rod is changed. When the opening of the rotating cover faces upward, the scraper rod is connected to the side wall inside the rotating cover and cleans the side wall. If the scraper rod is still connected to the side wall inside the rotating cover when the opening of the rotating cover faces downward, the flying paint particles will gather into agglomerates, and there is a situation where the agglomerated flying paint falls downward under the action of its own gravity. The falling agglomerated flying paint will affect the uniform spraying of the inner surface of the tower. Therefore, when the opening of the rotating cover faces downward, the scraper rod is separated from the side wall inside the rotating cover.

[0024] Optionally, the driving member also includes a driving motor, a connecting gear and a rotating gear ring, the driving motor is connected to the bottom surface of the fixed block, the connecting gear is fixedly sleeved on the output end of the driving motor, the rotating gear ring is fixedly connected to the inner bottom surface of the rotating cover, and the rotating gear ring is meshed with the connecting gear.

[0025] By adopting the above technical solution, the driving motor drives the connecting gear to rotate, and then drives the rotating gear ring to rotate, so that the rotating cover rotates around the fixed block.

[0026] Optionally, the connecting part includes a leakage hole, a guide pipe and a connecting pipe. There are multiple leakage holes and they are arranged circumferentially. The leakage holes are opened on the bottom surface of the rotating cover and are close to the bottom of the inner side wall of the rotating cover. The guide pipe is annular and is arranged on the bottom surface outside the rotating cover. The guide pipe is composed of two coaxially arranged annular vertical plates and a ring plate rotatably connected between the two vertical plates. The leakage hole is connected to the inside of the guide pipe. One end of the connecting pipe is connected to the ring plate and connected to the guide pipe, and the other end is connected to the paint extraction pipe.

[0027] By adopting the above technical solution, the leakage hole is set at the outer edge of the bottom of the rotating cover, so that the flying paint particles flowing along the side wall of the rotating cover to the bottom can enter the guide tube along the leakage hole, reducing the flow of flying paint particles on the bottom surface of the rotating cover, thereby reducing the accumulation of flying paint particles. The ring plate is rotatably connected to the two vertical plates, so that when the rotating cover rotates, the ring plate and the connecting pipe are stationary relative to the paint extraction pipe, which facilitates the connecting pipe to collect the flying paint particles in the guide tube.

[0028] In summary, the present invention includes the following beneficial technical effects: 1. The high-speed paint particles sprayed from the spray head are sprayed toward the inner surface of the tower through the opening at the top of the rotating cover. The flying paint particles near the spray head are confined inside the rotating cover. The flying paint particles outside the rotating cover enter the interior of the rotating cover under the action of wind flow and are collected. The flying paint is captured and collected. The structure of this scheme is simple and can be promoted on a large scale. Moreover, since the distance between the opening of the rotating cover and the flying paint particles outside the rotating cover is relatively close, a weak wind flow can drive the flying paint particles outside the rotating cover into the interior of the rotating cover, thereby weakening the negative impact of wind flow on the spraying effect of the spray head.

[0029] 2. The filter screen has a filtering effect on flying paint particles, avoiding the flying paint particles from being discharged through the ventilation holes as much as possible. At the same time, the filter screen is arranged between the connecting ring 2 and the connecting ring 3, which can avoid the flying paint particles from contaminating the connecting ring 1 as much as possible, and facilitate the subsequent cleaning of the device.

[0030] 3. As the rotating cover rotates, the scraper rod cleans the side wall of the rotating cover to reduce the residual flying paint particles on the side wall of the rotating cover, making it easier to collect the flying paint particles inside the rotating cover.

[0031] 4. The leakage hole is set at the outer edge of the bottom of the rotating cover, so that the flying paint particles flowing along the side wall of the rotating cover to the bottom can enter the guide tube along the leakage hole, reducing the flow of flying paint particles on the bottom surface of the rotating cover, thereby reducing the accumulation of flying paint particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of a spraying device and a tower commonly used in the prior art; Figure 2 Schematic diagram of a walking machine and a rotating cover in an embodiment of the present invention Figure 1 ; Figure 3 Schematic diagram of a walking machine and a rotating cover in an embodiment of the present invention Figure 2 ; Figure 4 is a cross-sectional schematic diagram of a rotating cover in an embodiment of the present invention; Figure 5 It is a structural schematic diagram of a fixing block and a connecting pipe in an embodiment of the present invention; Figure 6 It is a schematic diagram of the structure of the rotating cover and the scraper rod in an embodiment of the present invention; Figure 7 for Figure 6 A partial enlarged schematic diagram of part A; Figure 8 Schematic diagram of the structure of the rotating gear ring and the filter screen in an embodiment of the present invention.

[0033] Explanation of the accompanying drawings: 1. walking machine; 2. paint spraying system; 21. spray pipe; 22. spray head; 3. rotating cover; 4. driving member; 41. fixing block; 42. driving motor; 43. connecting gear; 44. rotating gear ring; 5. blade; 6. ventilation hole; 7. paint extraction pipe; 71. connecting member; 711. leakage hole; 712. guide pipe; 713. connecting pipe; 8. connecting ring one; 9. connecting ring two; 91. connecting ring one; 92. connecting ring two; 10. connecting ring three; 101. filter screen; 11. scraper rod; 12. tower. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described in conjunction with the accompanying drawings of the embodiment of the present invention. In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "install", "connect" and "connect" should be understood in a broad sense. Figure 2 -Attached Figure 8 The present invention is described in further detail.

[0035] The embodiment of the present invention discloses an automatic painting device for the inner surface of a wind power tower. Figures 2 to 8 , an automatic painting device for the inner surface of a wind power tower, comprising a walking machine 1, a painting system 2 and a flying paint collection system.

[0036] Reference Figure 2 The walking machine 1 is composed of a walking mechanism, a driving device, a positioning and navigation system, and a supporting device. The walking mechanism adopts a crawler or wheel design, which can adapt to the curved and irregular surfaces of the inner wall of the wind turbine tower 12. The crawler or wheel is usually made of wear-resistant material to ensure long-term stable operation in the spraying environment. The driving device includes a motor, and is also equipped with a reducer and an encoder to achieve precise speed and position control. The positioning and navigation system uses a laser sensor, an ultrasonic sensor or a visual system to detect the distance and position between the walking machine 1 and the inner wall of the tower 12. Through the navigation algorithm, it ensures that the walking machine 1 walks stably along a predetermined path inside the tower 12. The supporting device adopts an adjustable support arm or a stabilizing wheel to ensure that the walking machine 1 maintains balance during walking, avoids tilting or shaking of the walking machine 1 as much as possible, and improves the stability of the device.

[0037] Reference Figure 2 and Figure 3The paint spraying system 2 includes two sets of symmetrically arranged paint spraying parts and a paint supply system for stably supplying paint to the two sets of paint spraying parts. The paint spraying parts include a spraying pipe 21 and a spraying head 22. The spraying pipe 21 is mounted on the walking machine 1. The spraying head 22 is connected to the end of the spraying pipe 21. The two spraying heads 22 simultaneously spray paint on the inner surface of the tower 12. The paint supply system includes a paint pipe and a pressure pump mounted on the walking machine 1 to ensure that the paint is stably and continuously sprayed through the spraying pipe 21 and the spraying head 22.

[0038] The paint flying collection system is provided with two groups and corresponds to the two spray heads 22 one by one, so as to solve the paint flying problem at the spray heads 22. The paint flying collection system comprises a rotating cover 3, a driving member 4, a plurality of blades 5, a plurality of ventilation holes 6 and a paint extraction pipe 7.

[0039] Reference Figure 3 and Figure 4 The rotating cover 3 is rotatably sleeved on the end of the spray pipe 21. An opening is provided on the top of the rotating cover 3, which extends downward to form a cavity. The diameter of the rotating cover 3 gradually increases from top to bottom. The spray head 22 is located at the bottom of the cavity inside the rotating cover 3.

[0040] The rotating cover 3 forms a semi-enclosed space, which limits the flying paint particles overflowing near the spray head 22 to the inside of the rotating cover 3, which can reduce the probability of the flying paint particles diffusing into the surrounding environment, thereby reducing the pollution of the environment by the flying paint, reducing the risk of operators inhaling the flying paint particles, and improving the working environment. The rotating cover 3 also has a certain protective effect on the spray head 22, extending the service life of the spray head 22. The rotating cover 3 can also absorb part of the noise generated during the spraying process, reduce noise pollution, and improve the working environment of the operator.

[0041] Reference Figure 4 and Figure 7 The driving member 4 is used to drive the rotating cover 3 to rotate counterclockwise around its own central axis. The "counterclockwise" direction mentioned in the text refers to Figure 4 and Figure 6 The description made is that in actual use, the operator should make adjustments according to the specific structure so that the rotation direction of the rotating cover 3 and the inclination direction of the blades 5 can match to form a wind flow from the outside of the rotating cover 3 to the inside of the rotating cover 3.

[0042] When the rotating cover 3 rotates, the flying paint particles inside the rotating cover 3 will be affected by the centrifugal force. The direction of the centrifugal force is from the inside of the rotating cover 3 to the outside and perpendicular to the rotating cover 3, so that the flying paint particles inside the rotating cover 3 are pushed toward the side wall of the rotating cover 3 under the action of the centrifugal force, so that the flying paint particles adhere to the inner side wall of the rotating cover 3 and flow to the bottom of the internal cavity of the rotating cover 3, which helps to improve the collection efficiency of the flying paint particles.

[0043] Reference Figure 4and Figure 7 Specifically, the driving member 4 includes a fixed block 41 , a driving motor 42 , a connecting gear 43 and a rotating gear ring 44 .

[0044] The fixed block 41 is arranged in the middle of the bottom of the rotating cover 3. The fixed block 41 is coaxially arranged with the rotating cover 3. The fixed block 41 is rotatably connected with the rotating cover 3. The fixed block 41 plays a supporting role, which is convenient for installing other components. The spray pipe 21 passes through the fixed block 41 and is connected with the spray head 22. The driving motor 42 is fixedly connected to the bottom surface of the fixed block 41. The output end of the driving motor 42 extends upward and passes through the fixed block 41. The output end of the driving motor 42 is rotatably connected with the fixed block 41. The connecting gear 43 is fixedly sleeved on the output end of the driving motor 42. When the driving motor 42 rotates, it drives the connecting gear 43 to rotate. The rotating gear ring 44 is connected to the bottom surface of the internal cavity of the rotating cover 3, and the inner wall of the rotating gear ring 44 is provided with a plurality of teeth that can mesh with the connecting gear 43.

[0045] The driving motor 42 is started to drive the connecting gear 43 to rotate, thereby driving the rotating gear ring 44 and the rotating cover 3 to rotate. The structure is compact, easy to set up, mature technology, and easy to control the rotation speed of the rotating cover 3.

[0046] Reference Figure 4 and Figure 6 A plurality of blades 5 are arranged circumferentially and connected to the top of the inner side wall of the rotating cover 3, and the blade 5 located in the front is tilted rightward from top to bottom.

[0047] The blades 5 rotate synchronously with the rotating cover 3. Since the blades 5 are tilted and rotate, an aerodynamic effect is generated, so that the gas at the top of the rotating cover 3 tends to flow to the inside of the rotating cover 3, forming a wind flow from the top of the rotating cover 3 to the inside of the rotating cover 3. Restricted by the paint spraying of the spray head 22 inside the rotating cover 3, the wind flow flows along the side wall inside the rotating cover 3, bringing the flying paint particles outside the rotating cover 3 into the inside of the rotating cover 3, so that the flying paint particles move along the side wall inside the rotating cover 3 toward the bottom surface of the inside of the rotating cover 3.

[0048] Reference Figure 5 and Figure 7 A plurality of ventilation holes 6 are arranged circumferentially and opened on the bottom surface of the rotating cover 3 .

[0049] The wind flow brings the flying paint particles from the outside of the rotating cover 3 into the inside of the rotating cover 3 , and the wind flow flows along the side wall inside the rotating cover 3 and is discharged through the ventilation holes 6 .

[0050] Reference Figure 5 One end of the paint extraction pipe 7 is connected to the paint extraction system assembled on the walking machine 1, and the other end of the paint extraction pipe 7 is connected to the bottom of the internal cavity of the rotating cover 3 through a connecting piece 71.

[0051] The paint extraction pipe 7 can extract the flying paint particles that are clustered inside the rotating cover 3, reducing the accumulation of flying paint particles inside the rotating cover 3. The paint extraction system enables the paint extraction pipe 7 to have suction force on the flying paint particles inside the rotating cover. The paint extraction system can adopt a combination structure of a storage box and a pressure pump, etc. Since the structure belongs to the technical content well known to those skilled in the art, it will not be described in detail here.

[0052] When the spray head 22 sprays paint onto the inner surface of the tower 12, the driving motor 42 is started to rotate the rotating cover 3 around the fixed block 41, and the blades 5 rotate synchronously with the rotating cover 3 to form a wind flow. The flying paint particles outside the rotating cover 3 enter the inside of the rotating cover 3 with the wind flow, and under the action of the centrifugal force of the rotating cover 3, the flying paint particles are pushed to the side wall of the rotating cover 3, and then the flying paint particles flow along the side wall of the rotating cover 3 to the bottom of the rotating cover 3, and are finally collected by the paint extraction pipe 7.

[0053] The purpose of collecting the flying paint particles is achieved, and the negative impact of the flying paint particles on the spraying effect and the environment is reduced. Since the distance between the opening of the rotating cover 3 and the flying paint particles outside the rotating cover 3 is relatively close, the weak wind flow can drive the flying paint particles outside the rotating cover 3 into the inside of the rotating cover 3, thereby weakening the negative impact of the wind flow on the spraying effect of the spray head 22. In addition, the structure is relatively simple, has a wide range of applications, and is convenient for large-scale use.

[0054] Reference Figure 5 and Figure 7 Specifically, the connecting member 71 includes a plurality of leak holes 711, a guide tube 712 and a connecting tube 713. The plurality of leak holes 711 are arranged circumferentially and are opened on the bottom surface of the rotating cover 3, and are located at the outer edge of the bottom surface of the rotating cover 3; the leak holes 711 are arranged at the outer edge of the bottom of the rotating cover 3, so that the flying paint particles flowing along the side wall of the rotating cover 3 to the bottom can enter the guide tube 712 along the leak holes 711, thereby reducing the flow of the flying paint particles on the bottom surface of the rotating cover 3. The guide tube 712 is composed of two coaxially arranged annular vertical plates and a ring plate rotatably connected between the two vertical plates, that is, the bottom surface of the rotating cover 3, the opposite surfaces of the two vertical plates and the top surface of the ring plate form an annular cavity, and the cavity is connected to the inside of the rotating cover 3 through the leak holes 711. One end of the connecting tube 713 passes through the ring plate and is connected to the internal cavity of the guide tube 712, and the other end of the connecting tube 713 is connected to the paint extraction tube 7.

[0055] The flying paint particles on the inner side wall of the rotating cover 3 flow to the bottom of the rotating cover 3, and enter the guide pipe 712 through the leakage hole 711, and are finally sucked away by the connecting pipe 713 and the paint extraction pipe 7, so as to facilitate the collection of the flying paint particles and reduce the accumulation of the flying paint particles inside the rotating cover 3.

[0056] Reference Figure 4 and Figure 7Furthermore, the bottom surface of the rotating cover 3 is connected with a connecting ring 1 8, a connecting ring 2 9 and a connecting ring 3 10. The connecting ring 3 10, the connecting ring 1 8 and the connecting ring 2 9 are coaxially arranged and the inner diameters thereof gradually decrease, and all three are connected to the bottom surface of the cavity inside the rotating cover 3. The inner wall of the connecting ring 1 8 is connected to the left side wall of the ventilation hole 6, and the outer wall of the connecting ring 2 9 is connected to the right side wall of the ventilation hole 6.

[0057] Reference Figure 7 and Figure 8 The top surface of the connecting ring 2 9 is connected to the connecting ring 1 91, and the end of the connecting ring 1 91 away from the connecting ring 2 9 is connected to the connecting ring 2 92, and the bottom end of the connecting ring 2 92 extends downward to be lower than the top surface of the connecting ring 1 8. The inner wall of the connecting ring 3 10 is inclined from top to bottom toward the direction close to the connecting ring 1 8. A detachable filter screen 101 is provided between the top of the connecting ring 3 10 and the bottom of the connecting ring 2 92.

[0058] The connecting ring 1 8 divides the bottom of the internal cavity of the rotating cover 3 into a paint flow area and an exhaust area, optimizes the flow path and collection efficiency of the flying paint particles inside the rotating cover 3, and makes the flying paint particles gather between the inner side wall of the rotating cover 3 and the outer wall of the connecting ring 1 8, reducing the impact of the flying paint particles on the ventilation hole 6, facilitating the gathering of the flying paint particles, and facilitating the extraction of the paint extraction tube 7. The setting of the connecting ring 1 91 and the connecting ring 2 92 can further prevent the flying paint particles from moving to the ventilation hole 6. The inner wall of the connecting ring 3 10 is inclined, which has a guiding effect on the wind flow, facilitating the wind flow to flow between the connecting ring 2 92 and the connecting ring 1 8 along the inclined surface of the connecting ring 3 10, and be discharged through the ventilation hole 6.

[0059] The filter screen 101 has a filtering effect on the flying paint particles, and avoids the flying paint particles from being discharged through the ventilation hole 6 as much as possible. At the same time, the filter screen 101 is arranged between the connecting ring 2 92 and the connecting ring 3 10, which can avoid the flying paint particles from polluting the connecting ring 1 8 as much as possible, and facilitate the subsequent cleaning of the device. After the device has been used for a period of time, the filter screen 101 can be disassembled and replaced.

[0060] Reference Figure 4 and Figure 6 Furthermore, two scraper rods 11 are hingedly connected to the top surface of the fixed block 41. The two scraper rods 11 are symmetrically arranged, and the tops of the scraper rods 11 can be connected to the upper half of the inner side wall of the rotating cover 3. The center of the scraper rods 11 is offset. When the rotating cover 3 is open upward, the scraper rods 11 are connected to the inner side wall of the rotating cover 3. When the rotating cover 3 is open downward, the scraper rods 11 are offset under the action of gravity and separated from the inner side wall of the rotating cover 3.

[0061] When the opening of the rotating cover 3 faces upward, the scraper rod 11 cleans the side wall of the rotating cover 3 to reduce the residual flying paint particles on the side wall of the rotating cover 3, so as to facilitate the collection of flying paint particles inside the rotating cover 3. When the opening of the rotating cover 3 faces downward, if the scraper rod 11 is still in contact with the inner wall of the rotating cover 3, the flying paint particles in agglomerates will fall downward onto the inner surface of the tower 12 under the action of their own gravity, and the falling flying paint agglomerates will affect the uniform spraying of the inner surface of the tower 12. Therefore, when the opening of the rotating cover 3 faces downward, the scraper rod 11 is tilted under the action of its own gravity, and the scraper rod 11 is separated from the side wall inside the rotating cover 3.

[0062] The implementation principle of an automatic painting device for the inner surface of a wind turbine tower according to an embodiment of the present invention is as follows: The spray head 22 sprays paint on the inner surface of the tower 12, and the driving motor 42 is started to rotate the rotating cover 3 around the fixed block 41, and the blades 5 rotate synchronously with the rotating cover 3 to form a wind flow. The flying paint particles near the spray head 22 are confined inside the rotating cover 3, and the flying paint particles outside the rotating cover 3 enter the inside of the rotating cover 3 with the wind flow. Under the action of the centrifugal force of the rotating cover 3, the flying paint particles inside the rotating cover 3 are all pushed to the side wall of the rotating cover 3, and then the flying paint particles flow along the side wall of the rotating cover 3 to the bottom of the rotating cover 3, and enter the guide pipe 712 through the leak hole 711, and are finally collected through the connecting pipe 713 and the paint extraction pipe 7.

[0063] When the opening of the rotating cover 3 is facing upward, the scraper rod 11 is connected to the side wall inside the rotating cover 3, accelerating the agglomeration and collection of flying paint particles; when the opening of the rotating cover 3 is facing downward, the scraper rod 11 is separated from the side wall inside the rotating cover 3, improving the stability of the device operation.

Claims

1. An automatic painting device for the inner surface of a wind turbine tower, comprising a traveling machine (1) and a painting system (2), wherein the painting system (2) comprises a painting pipe (21) mounted on the traveling machine (1), and the end of the painting pipe (21) is connected to a painting head (22), characterized in that: Also includes: A rotating cover (3) is rotatably sleeved on the end of the spray pipe (21), the top of the rotating cover (3) is provided with an opening, the diameter of the rotating cover (3) gradually increases from top to bottom, and the spray head (22) is located inside the rotating cover (3); A driving member (4) is provided on the spray pipe (21) and is used to drive the rotating cover (3) to rotate counterclockwise around its own central axis; A plurality of blades (5) are arranged in a circumferential direction and connected to the top of the inner side wall of the rotating cover (3), wherein the blades (5) located in the front are arranged to be inclined to the right from top to bottom; A plurality of ventilation holes (6) arranged in a circumferential direction and provided on the bottom surface of the rotating cover (3); The paint extraction pipe (7) has one end connected to a paint extraction system mounted on the walking machine (1), and the other end connected to the bottom of the internal cavity of the rotating cover (3) through a connecting piece (71).

2. The automatic spray painting device for the inner surface of a wind turbine tower according to claim 1, characterized in that: The bottom surface of the interior of the rotating cover (3) is connected to a connecting ring 1 (8), and the connecting ring 1 (8) divides the bottom of the internal cavity of the rotating cover (3) into a paint flow area and an air extraction area.

3. The automatic spray painting device for the inner surface of a wind turbine tower according to claim 2, characterized in that: The bottom surface of the interior of the rotating cover (3) is connected to a second connecting ring (9), the diameter of the second connecting ring (9) is smaller than the diameter of the first connecting ring (8), the ventilation hole (6) is located between the inner wall of the first connecting ring (8) and the outer wall of the second connecting ring (9), the top of the second connecting ring (9) is connected to a first connecting ring (91), the outer wall of the first connecting ring (91) is connected to a second connecting ring (92), the first connecting ring (91) is placed horizontally, and the bottom of the second connecting ring (92) extends downward to be lower than the top surface of the first connecting ring (8).

4. The automatic spray painting device for the inner surface of a wind turbine tower according to claim 3 is characterized in that: The bottom surface inside the rotating cover (3) is connected to a connecting ring three (10), and the outer diameter of the connecting ring three (10) is greater than the outer diameter of the connecting ring two (92).

5. The automatic spray painting device for the inner surface of a wind turbine tower according to claim 4, characterized in that: The inner wall of the connecting ring three (10) is inclined from top to bottom towards the connecting ring one (8).

6. The automatic spray painting device for the inner surface of a wind turbine tower according to claim 5, characterized in that: A detachable filter screen (101) is provided between the top of the connecting ring three (10) and the bottom of the connecting ring two (92).

7. The automatic spray painting device for the inner surface of a wind turbine tower according to claim 1, characterized in that: The driving member (4) comprises a fixed block (41) rotatably connected to the middle part of the bottom surface of the rotating cover (3), the fixed block (41) being sleeved on the spray pipe (21), a scraper rod (11) being hingedly connected to the top surface of the fixed block (41), and the top of the scraper rod (11) being able to connect to the upper half of the inner side wall of the rotating cover (3).

8. The automatic painting device for the inner surface of a wind turbine tower according to claim 7, characterized in that: The center of gravity of the scraper rod (11) is offset, and when the rotating cover (3) is open upward, the scraper rod (11) is connected to the inner side wall of the rotating cover (3), and when the rotating cover (3) is open downward, the scraper rod (11) is separated from the inner side wall of the rotating cover (3).

9. The automatic spray painting device for the inner surface of a wind turbine tower according to claim 7, characterized in that: The driving member (4) further comprises a driving motor (42), a connecting gear (43) and a rotating gear ring (44); the driving motor (42) is connected to the bottom surface of the fixed block (41); the connecting gear (43) is fixedly sleeved on the output end of the driving motor (42); the rotating gear ring (44) is fixedly connected to the inner bottom surface of the rotating cover (3); and the rotating gear ring (44) is meshed with the connecting gear (43).

10. The automatic spray painting device for the inner surface of a wind turbine tower according to claim 1, characterized in that: The connecting member (71) comprises a leak hole (711), a flow guide tube (712) and a connecting tube (713). A plurality of leak holes (711) are provided and arranged in a circumferential direction. The leak holes (711) are provided on the bottom surface of the rotating cover (3) and are close to the bottom of the inner side wall of the rotating cover (3). The flow guide tube (712) is annular and is provided on the outer bottom surface of the rotating cover (3). The flow guide tube (712) is composed of two coaxially arranged annular vertical plates and an annular plate rotatably connected between the two vertical plates. The leak hole (711) is connected to the inside of the flow guide tube (712). One end of the connecting tube (713) is connected to the annular plate and connected to the flow guide tube (712), and the other end is connected to the paint extraction tube (7).

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