A device special for cleaning FAST ring beam round pipe

Abstract

The utility model discloses a special device for cleaning FAST ring beam round pipe, which comprises two semicircular hollow fixing frames (1) connected into a ring frame through a connecting mechanism, an adjustable gap mechanism (2) provided on the inner wall of the ring frame for adapting to the curved surface of the round steel pipe, a plurality of universal high-pressure nozzles (5) evenly distributed on the inner periphery of the frame, and the water outlet direction of the nozzles is inclined to the axial direction of the round pipe. The device is driven by the reaction force of the universal high-pressure nozzles (5) to move along the axial direction of the round pipe. The utility model realizes the self-adaptive clamping and fluid self-driving of the device on the surface of the round pipe through the openable and closable ring frame, the circumferential elastic top bead mechanism and the spiral inclination angle nozzle system. The universal nozzles generate a tangential driving force by spraying at an inclination angle, combined with the spiral overlapping spraying with an overlap of greater than or equal to 30%, to achieve efficient and dead angle-free cleaning, and completely avoid the risk of high-altitude manual work.

Description

Technical Field

[0001] This utility model relates to the technical field of FAST radio telescope equipment, and in particular to a special device for cleaning the circular tube of the FAST ring beam. Background Technology

[0002] The FAST (Five-hundred-meter Aperture Spherical Radio Telescope) ring beam is the peripheral support structure for the spherical main cable net, providing effective support conditions for the main cable net. The ring beam is a truss with a cross-section of 5.5 meters × 11 meters, arranged around a circumference with a diameter of 500 meters, divided into five sections: A, B, C, D, and E. The structure of each section is rotationally symmetrical about the center of the circle. The two end members of the upper chord of the ring beam have irregular box-shaped cross-sections, on which reserved tracks for the reflector panel hoisting equipment are installed. The remaining chord members are round steel tubes, and the web members are mainly round steel tubes, with some I-beams used. Φ325×14 round steel tubes are installed at the two corner points of the column tops and at the ball joints of the lower chord of the truss.

[0003] The ring beam is located in an exposed, high-altitude environment. Long-term exposure to rainwater, dust, and moss and microbial growth accelerates corrosion, posing reliability issues and affecting its overall aesthetics. The FAST ring beam requires cleaning and maintenance approximately every 5 years. The ring beam has a surface area of ​​9267 square meters, with the transverse circular pipes accounting for about half of the total area.

[0004] The cleaning of ring beams involves a large workload. The surface of the transverse circular pipes is curved, and there is no place for the cleaning personnel to stand, making the cleaning of the circular pipes a difficult point in the ring beam cleaning process. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of this utility model is to provide a specially designed device with an improved structure for cleaning the circular tubes of the FAST ring beam.

[0006] To achieve the above objectives, this utility model provides a special device for cleaning the circular tubes of the FAST ring beam, comprising: Two semi-circular hollow fixing frames (1) are connected in an openable and closable manner to form a ring frame through a connecting mechanism; The inner wall of the annular frame is provided with an adjustable gap mechanism (2) to adapt to the curved surface of the round steel pipe; Several omnidirectional high-pressure nozzles (5) are evenly distributed around the inner circumference of the frame, with the nozzles tilted towards the axis of the circular pipe. The device is driven by the reaction force of the universal high-pressure nozzle (5) to move along the axial direction of the circular tube.

[0007] Furthermore, the connecting mechanism includes a hinge (6) and a butterfly nut locking member (7), with the hinge located at the axial end of the frame and the butterfly nut locking member located at the axial end of the other side of the frame.

[0008] Furthermore, the adjustable gap mechanism (2) is a ball positioning screw array, which includes at least 3 sets of elastic ball components (8) evenly distributed along the circumference, and the ball extension length is adjustable in the range of 0-10mm.

[0009] Furthermore, the universal high-pressure nozzles (5) are arranged in a spiral pattern, with the nozzle axis forming an angle of 15°-45° with the radial direction of the circular tube, and the overlap rate of the spray areas of adjacent nozzles is ≥30%.

[0010] Furthermore, the outer wall of the frame is provided with a high-pressure water inlet (3) and a ring-shaped water supply pipeline (4), and the universal high-pressure nozzles (5) are distributed and installed on the ring-shaped water supply pipeline (4).

[0011] Furthermore, the semi-circular hollow fixing frame (1) includes two parallel semi-circular hollow tubes, which serve as both a frame structure and an internal hollow cavity as a ring-shaped water supply pipeline (4).

[0012] Furthermore, a number of fixing nuts (9) are evenly distributed along the circumference of the semi-circular hollow fixing frame (1), and a screw (10) is provided on the fixing nut (9).

[0013] Furthermore, the elastic ball assembly (8) includes the screw (10), stainless steel ball (21), silicon spring (22) and PTFE wear-resistant gasket (23), with a ball diameter of Φ8mm and a contact pressure adjustment range of 5-20N.

[0014] Furthermore, the end of the screw (10) is a hollow structure, and the stainless steel ball (21), silicon spring (22) and PTFE wear-resistant gasket (23) are installed inside the hollow structure.

[0015] Furthermore, the hollow fixing frame (1) is made of 6061-T6 aluminum alloy casting with a wall thickness ≥8mm.

[0016] This utility model discloses a special device for cleaning FAST ring beam circular pipes. Through an openable and closable annular frame, a circumferentially distributed elastic top ball mechanism, and a spiral tilting nozzle system, the device achieves adaptive clamping and fluid self-drive on the surface of the circular pipe. The omnidirectional nozzle generates tangential driving force through tilting spray, combined with ≥30% spiral overlapping spray, to achieve efficient cleaning without dead angles and completely avoid the risks of high-altitude manual operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention in its open state; Figure 2 This is another structural diagram of the present invention in its open state; Figure 3 This is a schematic diagram of the closed-state structure of this utility model; Figure 4This is another structural diagram of the present invention in its closed state; Figure 5 This is a cross-sectional schematic diagram of the present invention; Figure 6 for Figure 5 Enlarged structural diagram of section A in the middle; Figure 7 This is a side view of the structure of this utility model. Detailed Implementation

[0018] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0019] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] The following combination Figures 1-7 The specific embodiments of this utility model will be described in detail below. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0022] This utility model discloses a special device for cleaning the circular tubes of the FAST ring beam. It is a ring-shaped cleaning device based on the principle of fluid self-drive. Through an openable frame structure, an adaptive gap adjustment system and a spiral spray module, it can achieve efficient and non-destructive cleaning of the surface of the circular tube.

[0023] This utility model discloses a special device for cleaning the circular tubes of the FAST ring beam, comprising: Two semi-circular hollow fixing frames 1 are connected in an openable and closable manner to form a ring frame through a connecting mechanism; the two semi-circular hollow fixing frames 1 are hinged by hinges 6 and locked by butterfly nuts 7 to form a closed ring frame, which also serves as a water supply pipeline made of 6061-T6 aluminum alloy with a wall thickness of 8-10mm.

[0024] An adjustable gap mechanism 2 is provided on the inner wall of the annular frame to adapt to the curved surface of the round steel pipe; three sets of elastic top ball assemblies 8 are evenly distributed along the inner circumference of the frame, and the extension of the top ball is adjusted by screws 10 to 0-10mm.

[0025] Several omnidirectional high-pressure nozzles 5 are evenly distributed around the inner circumference of the frame, with the nozzles tilted towards the axis of the circular pipe. The omnidirectional high-pressure nozzles 5 are arranged in a spiral pattern on the annular water supply pipeline 4, with the nozzle axis forming an angle of 30°±5° with the radial direction. The annular water supply pipeline 4 is integrated into the internal cavity of the semi-circular hollow fixing frame 1 with an equivalent diameter of Φ40mm.

[0026] This utility model device is driven by the reaction force of the universal high-pressure nozzle 5 to move along the axial direction of the circular tube.

[0027] The core frame structure of this utility model consists of two semi-circular hollow fixing frames 1 connected by hinges 6 at their axial ends, forming an openable and closable annular frame body. At the opposite axial end of the hinges 6, a butterfly nut locking element 7 is provided; tightening the butterfly nut locking element closes and locks the two semi-circular frames. The internal cavity of the semi-circular hollow fixing frame 1 forms an annular water supply pipeline 4, and its outer wall is welded with a high-pressure water inlet 3 for connecting an external water pump.

[0028] Gap Adjustment System: At least three sets of adjustable gap mechanisms 2 are evenly distributed along the inner circumference of the annular frame. Each set of mechanisms includes a fixing nut 9, a screw 10, and an elastic ball assembly 8. The fixing nut 9 is welded to the side wall of the fixing frame 1. The screw 10 is screwed into the fixing nut 9 and its position can be adjusted axially. A PTFE wear-resistant gasket 23, a silicon spring 22, and a stainless steel ball 21 are sequentially installed in the hollow cavity at the end of the screw 10. The extension length of the stainless steel ball 21 can be adjusted from 0-10mm by rotating the screw 10.

[0029] Spraying system: Several universal high-pressure nozzles 5 are arranged along the spiral line on the annular water supply pipeline 4. The nozzles are sealed to the annular water supply pipeline 4 through threaded interfaces. The nozzle axis forms an angle of 30°±5° with the radial direction of the circular pipe, preferably 30°. The overlap rate of the spraying areas of adjacent nozzles is ≥30%.

[0030] During installation: 1. Frame assembly: Loosen the butterfly nut locking piece 7, rotate around the hinge 6 to unfold the two semi-arc fixing frame 1 to the open state; put the device into the outer wall of the Φ325×14 steel pipe of the ring beam to be cleaned; close the two semi-arc frames, align the locking end and tighten the butterfly nut locking piece 7, so that the device forms a closed loop and is fixed to the outside of the round pipe.

[0031] 2. Gap adjustment: Rotate each screw 10 in sequence to push the stainless steel ball 21 inward until all stainless steel balls 21 contact the outer wall of the round tube and generate a pre-pressure of 5-20N; by fine-tuning the screw 10, a uniform gap of 1.5±0.3mm is formed between the device and the round tube to ensure that the device can slide axially but without radial wobbling.

[0032] 3. Pipeline connection: Connect the outlet of the high-pressure water pump to the high-pressure inlet 3 on the frame via a quick-connect hose.

[0033] During work: 1. Cleaning start-up phase: The high-pressure water pump is started at a working pressure of 20MPa and a flow rate of 30L / min. The water flows through the high-pressure inlet 3 and into the ring water pipeline 4. The water flow is evenly distributed to each of the universal high-pressure nozzles 5, and the high-pressure water jet is sprayed out at an angle of 30° from the nozzle.

[0034] 2. Self-movement driven mechanism: When the water jet impacts the surface of the circular pipe, it generates a reaction force F in the opposite direction to the nozzle axis. The reaction force is decomposed into radial and tangential components. The tangential component drives the entire device to move at a speed of about 0.8 m / min along the axial direction of the circular pipe, without the need for external power.

[0035] 3. Adaptive adjustment function: When the round tube has a diameter deviation or an uneven surface, the stainless steel ball 21 automatically expands and contracts under the action of the silicon spring 22 to compensate and maintain a constant contact pressure; the PTFE wear-resistant gasket 23 reduces the sliding friction coefficient μ≤0.15 to ensure smooth movement.

[0036] 4. Full-coverage cleaning process: The nozzles are arranged in a spiral with a pitch of 120mm, and adjacent spray areas have a 35% overlap. When the device moves, the water column impacts the pipe wall at a 30° angle, stripping away contaminants and forming a vortex to thoroughly clean the curved surface.

[0037] 5. Homework completed: After cleaning a single section of the circular pipe, stop the pump to release the water pressure; loosen the butterfly nut locking piece 7, open the frame removal device, and move to the next work section.

[0038] The technical effects of this utility model are as follows: 1. Connection reliability: The symmetrical layout of the hinge 6 and the wing nut locking part 7 ensures that the force is evenly distributed when the frame is closed; 2. Adaptive capability: The elastic top ball assembly 8 compensates for the pipe diameter tolerance of ±2mm in real time, adapting to the manufacturing error of the FAST ring beam; 3. High-efficiency drive: The 30° tilt nozzle maximizes tangential driving force, improving energy utilization by 40%; 4. Thorough cleaning: The spiral-arranged nozzles, combined with self-moving mechanism, achieve 100% circumferential coverage of the circular tube, resulting in high cleaning efficiency.

[0039] Any process or method described in the flowcharts of this utility model or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, which can be implemented in any computer-readable medium for use by an instruction execution system, apparatus, or device. The computer-readable medium can be any medium containing a program for storage, communication, propagation, or transmission for use by the execution system, apparatus, or device, including read-only memory, magnetic disks, or optical disks.

[0040] In the description of this specification, the references to terms such as "embodiment," "example," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, those skilled in the art can combine or combine the different embodiments or examples described in this specification and their features therein without creating contradiction.

[0041] While embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and alterations to the above embodiments within the scope of the present invention.

Claims

1. A special device for cleaning the circular tubes of the FAST ring beam, characterized in that, include: Two semi-circular hollow fixing frames (1) are connected to form a ring frame by a connecting mechanism; The inner wall of the annular frame is provided with an adjustable gap mechanism (2) to adapt to the curved surface of the round steel pipe; Several omnidirectional high-pressure nozzles (5) are evenly distributed around the inner circumference of the frame, and the nozzles are inclined to the direction of the water outlet pointing towards the axis of the circular pipe; The device is driven by the reaction force of the universal high-pressure nozzle (5) to move along the axial direction of the circular tube.

2. The special device for cleaning the circular tube of the FAST ring beam as described in claim 1, characterized in that, The connecting mechanism includes a hinge (6) and a butterfly nut locking member (7). The hinge is located at the axial end of the frame, and the butterfly nut locking member is located at the axial end of the other side of the frame.

3. The special device for cleaning the circular tubes of the FAST ring beam as described in claim 1, characterized in that, The adjustable gap mechanism (2) is a ball positioning screw array, which includes at least 3 sets of elastic ball components (8) evenly distributed along the circumference, and the ball extension length is adjustable in the range of 0-10mm.

4. The special device for cleaning the circular tubes of the FAST ring beam as described in claim 1, characterized in that, The universal high-pressure nozzles (5) are arranged in a spiral pattern, with the nozzle axis forming an angle of 15°-45° with the radial direction of the circular pipe, and the overlap rate of the spray areas of adjacent nozzles is ≥30%.

5. The special device for cleaning the circular tubes of the FAST ring beam as described in claim 1, characterized in that, The outer wall of the frame is provided with a high-pressure water inlet (3) and a ring-shaped water supply pipeline (4), and the universal high-pressure nozzles (5) are distributed and installed on the ring-shaped water supply pipeline (4).

6. The special device for cleaning the circular tubes of the FAST ring beam as described in claim 1, characterized in that, The semi-circular hollow fixing frame (1) includes two parallel semi-circular hollow tubes, which serve as both a frame structure and an internal hollow cavity as a ring-shaped water supply pipeline (4).

7. The special device for cleaning the circular tubes of the FAST ring beam as described in claim 3, characterized in that, A semi-circular hollow fixing frame (1) has several fixing nuts (9) evenly distributed along the circumference, and a screw (10) is provided on the fixing nut (9).

8. The special device for cleaning the circular tubes of the FAST ring beam as described in claim 7, characterized in that, The elastic ball assembly (8) includes the screw (10), stainless steel ball (21), silicon spring (22) and PTFE wear-resistant gasket (23), with a ball diameter of Φ8mm and a contact pressure adjustment range of 5-20N.

9. The special device for cleaning the circular tube of the FAST ring beam as described in claim 8, characterized in that, The end of the screw (10) is a hollow structure, and the stainless steel ball (21), silicon spring (22) and PTFE wear-resistant gasket (23) are installed inside the hollow structure.

10. The apparatus as claimed in claim 1, characterized in that, The hollow fixing frame (1) is made of 6061-T6 aluminum alloy casting with a wall thickness ≥8mm.

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