A mobile adsorption device for use in high flow rate water areas

Abstract

The application discloses a mobile adsorption device for high flow velocity water area. The adsorption module is fixedly installed in the middle of the fluid guide module, and the rolling contact module is fixedly connected to the bottom of the fluid guide module. The cyclone vane in the adsorption module is used for guiding water flow to form high-speed cyclone, and the water under the wall surface to be adsorbed is adsorbed by the pressure difference caused by the cyclone. When the mobile adsorption device is adsorbed to the wall surface to be adsorbed, the rolling contact module can be rollingly attached to the wall surface to be adsorbed. The fluid guide module is provided with a flow guide area, which is used for offsetting external water flow and maintaining the stability of the cyclone flow field generated by the cyclone vane in the high flow velocity water area, so that the mobile adsorption device can stably adsorb the wall surface to be adsorbed. The device is simple in structure, convenient to install and high in durability, and is especially suitable for rivers, lakes and coastal areas with high water flow velocity, and can generate sufficient suction force in the high flow velocity water area.

Description

Technical Field

[0001] The invention belongs to the technical field of underwater adsorption, and in particular relates to a mobile adsorption device used in high-velocity waters. Background Art

[0002] my country has thousands of large and medium-sized hydropower stations in operation. Maintenance and overhaul of these stations, particularly the diversion and tailrace tunnels of large hydropower stations, has long been a challenge plaguing the hydropower industry. Existing tunnel overhauls have all been conducted under static water conditions, with some successful cases demonstrating the feasibility of overhauling long tunnels under static water conditions. However, due to technical limitations, tunnel overhauls under flowing water have yet to be implemented in China.

[0003] For various reasons, many power plants are unable to shut down for tunnel maintenance, preventing them from complying with national hydropower dam safety inspection requirements. For example, the tailrace tunnels of some hydropower plants have not been inspected since their construction due to this reason. Huadian's other power plants in the Wujiang River Basin face similar challenges.

[0004] Currently, traditional underwater operating equipment is primarily used in still water or low-flow environments. Existing equipment struggles to operate reliably under high flow rates. Therefore, the development or modification of an adsorption device suitable for high-flow conditions is crucial to addressing this challenge. Such an adsorption device must be able to securely adhere to the tunnel wall in high-flow environments, providing a stable working platform for the operating equipment. This technological breakthrough will not only meet the daily maintenance needs of hydropower stations but also ensure their safe operation. Summary of the Invention

[0005] In order to solve the problems existing in the background technology, the purpose of the present invention is to provide a mobile adsorption device for use in high-flow waters, which can solve the problem of low working efficiency of adsorption devices in high-flow waters in the prior art.

[0006] The technical solutions adopted in the present invention are as follows:

[0007] The mobile adsorption device includes an adsorption module, a rolling contact module and a fluid guide module; the adsorption module is fixedly installed in the middle of the fluid guide module, and the rolling contact module is fixedly connected to the bottom of the fluid guide module. The swirl blades in the adsorption module are used to guide the flow of water to form a high-speed swirl, and underwater adsorption of the wall to be adsorbed is performed through the pressure difference caused by the swirl. When the mobile adsorption device is adsorbed on the wall to be adsorbed, the rolling contact module can be rolledly attached to the wall to be adsorbed. A guide area is provided in the fluid guide module, which is used to offset the external water flow and maintain the stability of the swirl flow field generated by the swirl blades in high-flow waters, thereby realizing stable adsorption of the mobile adsorption device on the wall to be adsorbed.

[0008] The fluid guide module includes a guide ring, a suction cup shell and a spring pin fixing plate; the spring pin fixing plate is connected to the suction cup shell, and the guide ring is movably connected to the outer periphery of the suction cup shell through an adjustable spring pin, and the outer wall of the suction cup shell is recessed inward, so that the outer wall of the suction cup shell is an inwardly concave arc surface, the wall surface of the guide ring close to the suction cup shell is an outwardly convex arc surface, and the wall surface of the guide ring away from the suction cup shell is a plane, the inwardly concave arc surface of the suction cup shell and the outwardly convex arc surface of the guide ring are consistent in curvature, and the suction cup shell A semi-annular guide area is formed between the inwardly concave arc surface and the outwardly convex arc surface of the guide ring. When the mobile adsorption device performs the adsorption process on the wall surface to be adsorbed, a part of the water flowing into the mobile adsorption device flows to the swirl blades, and a swirl flow field for adsorbing the wall surface is formed near the swirl blades. The other part of the water flows into the guide area. After passing through the guide area, the water flow direction is changed to form a water flow opposite to the external water flow, thereby offsetting the flow velocity of the external water flow, maintaining the stability of the swirl flow field, and thus realizing the stable adsorption of the mobile adsorption device on the wall surface to be adsorbed.

[0009] The rolling contact module includes a sponge gasket and inner and outer ball groups. Both ball groups are connected to the lower surface of the outer periphery of the suction cup shell. Each ball group is mainly formed by a number of round balls tightly arranged along the circumference of the suction cup shell, and the round balls in the outer ball group and the round balls in the inner ball group are staggered. The sponge gasket is located on the outside of the ball group and is connected to the lower surface of the outer periphery of the suction cup shell. The sponge gasket and the ball group are both used to isolate the external water flow flowing toward the vicinity of the swirl blade. When the mobile adsorption device is adsorbed on the wall to be adsorbed, the inner and outer round balls can be rolled and attached to the wall to be adsorbed.

[0010] The adsorption module includes an underwater sealed motor and a swirl blade. The shell of the underwater sealed motor is fixedly installed on the upper surface of the suction cup shell. The swirl blade is located inside the suction cup shell, and the output shaft of the underwater sealed motor is fixedly connected to the swirl blade. The underwater sealed motor is used to drive the swirl blade to rotate. After the swirl blade rotates, the water flow flowing into the suction cup shell is guided to form a high-speed swirl, and then the wall surface to be adsorbed is underwater adsorbed through the swirl flow field.

[0011] The spring pin fixing plate is arranged parallel to the upper surface of the suction cup shell. The outer periphery of the spring pin fixing plate is mounted on the upper surface of the suction cup shell movably up and down through a circle of spring pins. The spring pins are used to provide buffering force during the movement of the adsorption device.

[0012] The two-circle ball groups in the rolling contact module are arranged outside the swirl blades in the adsorption module to isolate the external water flow flowing near the swirl blades.

[0013] The guide ring and the suction cup housing are coaxially or eccentrically arranged, and the adjustable spring pin is used to adjust the eccentricity between the guide ring and the suction cup housing to adapt to the water flow field under different working conditions.

[0014] In the diversion area, the flow direction of the incoming water flow is parallel to the upper surface of the suction cup shell, and the angle between the flow direction of the outgoing water flow and the lower surface of the suction cup shell is 10°~20°.

[0015] The guide area is the cavity formed between the guide ring and the suction cup shell. When a large external water flow flows toward the adsorption device, part of the water flow will flow into the guide area. After passing through the guide area, a water flow in the opposite direction of the external interference flow field is formed, thereby offsetting the flow rate of the external water flow to protect the swirl flow field generated by the rotation of the internal swirl blades. The shape of the guide area has been specially designed. The edge shape of the guide ring of the suction cup shell will allow as much water flow as possible to enter the guide area. It is a semi-circular ring, and the angle between the flow rate of the water flowing out of the guide area and the horizontal direction will also be reduced, thereby offsetting the external water flow to a greater extent. Through multiple simulations, it was found that within a certain range, the larger the guide area, the more water can flow through the guide area, and the protective effect of the guide area on the central flow field of the blade is more obvious.

[0016] Multiple fluid simulations show that the effectiveness of the diversion area in protecting the internal vortex flow field and the suction force generated by the suction cup are primarily related to the water flow exit angle θ within the diversion area and the diversion area width d. If the water flow exit angle θ is too large, the water flowing out of the diversion area will impact the wall surface where the suction cup is attached, causing a recoil effect on the suction cup, reducing suction and significantly reducing adsorption stability. Simulations found that a water flow exit angle θ of 10°-20° is most effective. If the diversion area is too small, the protection effect is not obvious, while if it is too large, the power consumption of the entire machine will be significantly increased. Generally, the protection effect is best when the diversion area width d is 20-50mm.

[0017] The gap between the guide ring and the suction cup housing is adaptively adjusted: the guide ring is fixed to the outer frame, and the guide ring and suction cup housing are connected by an adjustable spring pin, allowing the width d of the diversion area to be adjusted. When water flows from one side, the outer guide ring, fixed to the frame, does not move, while the suction cup housing will move in the direction of the water flow due to the impact. This allows the suction cup gap to automatically adjust the diversion area width d based on the direction and force of the water flow, creating a larger diversion gap while maintaining the total outer diameter of the suction cup.

[0018] The beneficial effects of the present invention are:

[0019] 1. The adsorption module of the present invention uses rotating blades to create a high-speed rotating water flow, thereby generating a negative pressure area to form an adsorption effect. The rolling contact module is used to contact the entire adsorption device with the ground, so that the adsorption device can move while adsorbing underwater, making the adsorption device more flexible.

[0020] 2. The fluid guide module of this invention is designed to optimize the water flow path through the adsorption device, improving adsorption efficiency and reducing the impact of water flow on the adsorption module. This device has a simple structure, is easy to install, and is highly durable. It is particularly suitable for fast-flowing rivers, lakes, and coastal areas, and can generate sufficient suction in high-velocity waters.

[0021] 3. This device can provide good protection for the flow field in the central area and is suitable for various scenarios where flow field protection is required in high flow rate situations. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a cross-sectional view of the adsorption device housing;

[0023] Figure 2 Schematic diagram of the adsorption device resisting water flow interference;

[0024] Figure 3 This is a bottom view of the adsorption device;

[0025] Figure 4 This is the overall main view of the adsorption device;

[0026] Figure 5 This is an exploded diagram of the adsorption device structure;

[0027] Figure 6 Schematic diagram of changing the guide area for the locking pin.

[0028] In the figure: 1. Guide ring; 2. Guide area; 3. Suction cup housing; 4. Underwater sealed motor; 5. Swirl blade; 6. Round ball; 7. Sponge washer; 8. Spring pin fixing plate; 9. Spring pin; 10. Adjustable spring pin. DETAILED DESCRIPTION

[0029] The present invention is described in detail below with reference to specific implementation cases. The following implementation cases will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form.

[0030] like Figure 1As shown, the device includes an adsorption module, a rolling contact module and a fluid guide module; the adsorption module is fixedly installed in the middle of the fluid guide module, and the rolling contact module is fixedly connected to the bottom of the fluid guide module. The swirl blade 5 in the adsorption module is used to guide the water flow to form a high-speed swirl, and underwater adsorption of the wall to be adsorbed is performed through the pressure difference caused by the swirl. When the mobile adsorption device is adsorbed on the wall to be adsorbed, the rolling contact module can be rolled and attached to the wall to be adsorbed. A guide area 2 is provided in the fluid guide module. The guide area 2 is used to offset the external water flow and maintain the stability of the swirl flow field generated by the swirl blade 5 in the high-velocity water area, thereby realizing stable adsorption of the mobile adsorption device on the wall to be adsorbed.

[0031] like Figure 2 and Figure 5 As shown, the fluid guide module includes a guide ring 1, a suction cup shell 3 and a spring pin fixing plate 8; the spring pin fixing plate 8 is connected to the suction cup shell 3, and the guide ring 1 is connected to the outer periphery of the suction cup shell 3 through an adjustable spring pin 10. The outer wall of the suction cup shell 3 is recessed inward, so that the outer wall of the suction cup shell 3 is an inwardly concave arc surface, the wall surface of the guide ring 1 close to the suction cup shell 3 is an outwardly convex arc surface, and the wall surface of the guide ring 1 away from the suction cup shell 3 is a plane, the inwardly concave arc surface of the suction cup shell 3 and the outwardly convex arc surface of the guide ring 1 are consistent in curvature, and the suction cup outer wall is concave. A semi-annular guide area 2 is formed between the concave arc surface of the shell 3 and the convex arc surface of the guide ring 1. When the mobile adsorption device performs the adsorption process on the wall surface to be adsorbed, a part of the water flowing into the mobile adsorption device flows to the swirl blade 5, and a swirl flow field for adsorbing the wall surface is formed near the swirl blade 5. The other part of the water flows into the guide area 2. After passing through the guide area 2, the water flow direction is changed to form a water flow opposite to the external water flow, thereby offsetting the flow velocity of the external water flow, maintaining the stability of the swirl flow field, and further realizing the stable adsorption of the mobile adsorption device on the wall surface to be adsorbed.

[0032] like Figure 3 As shown, the rolling contact module includes a sponge gasket 7 and inner and outer ball groups. The two ball groups are connected to the lower surface of the outer periphery of the suction cup shell 3. Each ball group is mainly composed of a number of round balls 6 tightly arranged along the circumference of the suction cup shell 3, and the round balls 6 in the outer ball group and the round balls 6 in the inner ball group are staggered. The sponge gasket 7 is located on the outside of the ball group, and the sponge gasket 7 is connected to the lower surface of the outer periphery of the suction cup shell 3. The sponge gasket 7 and the ball group are both used to isolate the external water flow flowing toward the vicinity of the swirl blade 5. When the mobile adsorption device is adsorbed on the wall to be adsorbed, the inner and outer round balls 6 can be rolled and attached to the wall to be adsorbed.

[0033] The adsorption module includes an underwater sealed motor 4 and a swirl blade 5. The shell of the underwater sealed motor 4 is fixedly mounted on the upper surface of the suction cup shell 3. The swirl blade 5 is located inside the suction cup shell 3, and the output shaft of the underwater sealed motor 4 is fixedly connected to the swirl blade 5. The underwater sealed motor 4 is used to drive the swirl blade 5 to rotate. After the swirl blade 5 rotates, it guides the water flow flowing into the suction cup shell 3 to form a high-speed swirl, and then performs underwater adsorption on the wall surface to be adsorbed through the swirl flow field.

[0034] like Figure 4 As shown, the spring pin fixing plate 8 is arranged parallel to the suction cup housing 3, and the outer periphery of the spring pin fixing plate 8 is mounted on the upper surface of the suction cup housing 3 through a circle of spring pins 9 so as to be movable up and down. The spring pins 9 are used to provide a buffering force during the movement of the adsorption device.

[0035] The two-circle ball group in the rolling contact module is arranged outside the swirl blade 5 in the adsorption module to isolate the external water flow flowing near the swirl blade 5.

[0036] The guide ring 1 and the suction cup housing 3 are coaxially or eccentrically arranged, and the adjustable spring pin 10 is used to adjust the distance d between the guide ring 1 and the suction cup housing 3, as well as the eccentricity between the guide ring 1 and the suction cup housing 3 to adapt to the water flow field under different working conditions.

[0037] In the diversion area 2, the flow direction of the incoming water flow is parallel to the upper surface of the suction cup shell 3, and the angle between the flow direction of the outgoing water flow and the lower surface of the suction cup shell 3 is 10°~20°.

[0038] The fluid guide module includes a guide ring 1 and a suction cup housing 3. The guide area 2 is the cavity area formed between the guide ring 1 and the suction cup housing 3. The working principle of the guide area 2 is as follows: Figure 2 As shown, when a large external water flow flows toward the adsorption device, a portion of the water flow will flow into the guide area 2. After passing through the guide area 2, a water flow in the opposite direction of the external interference flow field is formed, thereby offsetting the flow velocity of the external water flow to protect the swirl flow field generated by the rotation of the internal swirl blades 5. The shape of the guide area 2 has been specially designed. The edge shape of the guide ring 2 of the suction cup housing 3 will allow as much water as possible to enter the guide area, which is a semi-circular ring. The angle between the flow velocity of the water flowing out of the guide area 2 and the horizontal direction will also be reduced, thereby offsetting the external water flow to a greater extent. Through multiple simulations, it was found that within a certain range, the larger the guide area, the more water can flow through the guide area, and the protective effect of the guide area on the central flow field of the blade is more obvious.

[0039] The rolling contact module mainly arranges two circles of staggered circular balls 6 on the suction cup housing 3 not far from the swirl blades 5. The ordinary single-circle circular ball arrangement will leave gaps for water to flow in no matter how it is arranged, but the alternating arrangement of circular balls can completely block the radial direction of the swirl blades. The two circles of circular balls are densely arranged around the blades, and the bottom of the circular balls are in direct contact with the wall to be adsorbed. The densely distributed circular balls can further withstand part of the interfering water flow and protect the rotating flow field formed by the swirl blades. Another major function of the circular balls is to enable the adsorption device to achieve flexible movement through the rotation of the circular balls while being in adsorption contact with the ground / wall. A circle of sponge gaskets 7 is also arranged on the outer ring of the circular balls 6 to further isolate the external water flow rate.

[0040] The spring pin fixing plate 8 is connected to the swirl blades 5 and the sealing motor 4, and is connected to the suction cup housing 3 via spring pins 9. The installation of spring pins 9 here serves multiple purposes. First, after the spring pins 9 are tightened, if the mobile suction device encounters uneven ground, the spring pins 9 act as an adaptive device to keep the circular ball 6 in close contact with the ground. Second, when the suction device is subjected to a transient upward load, the spring pins 9 will cause the housing to remain in close contact with the wall for a short time before separating. The buffer time provided by the spring pins 9 allows the external suction cup control system to adjust the speed to respond to the external load. Increasing the gap in the diversion area 2 allows more water to be introduced, achieving a better diversion effect. However, increasing the gap by increasing the diameter of the suction cup housing 3 will increase the power load on the suction cup, which is not worth the cost. The guide ring 1 and the suction cup housing 3 are also connected by a set of adjustable spring pins 10. When the mobile suction device is disturbed by the uniform flow rate around the circumference, the guide ring 1 can be fixed concentrically with the suction cup housing 3 via the adjustable spring pins 10. Figure 6 However, when the mobile adsorption device is only subjected to a unidirectional load, the guide ring 1 and the suction cup housing 3 can be eccentrically fixed by the adjustable spring pin 10. Figure 6 Right, this can make the gap of the guide area 2 on the side affected by the flow field larger, achieving a better effect of protecting the flow field. The design of the adjustable spring pin 10 is to enable the mobile adsorption device to adjust the guide area according to the environment and adapt to different working conditions.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A mobile adsorption device for use in high-velocity waters, characterized by: The invention comprises an adsorption module, a rolling contact module and a fluid guide module; the adsorption module is fixedly installed in the middle of the fluid guide module, the rolling contact module is fixedly connected to the bottom of the fluid guide module, the swirl blade (5) in the adsorption module is used to guide the water flow to form a swirl, and underwater adsorption is performed on the wall surface to be adsorbed by the pressure difference caused by the swirl, when the mobile adsorption device is adsorbed on the wall surface to be adsorbed, the rolling contact module can be rolled and attached to the wall surface to be adsorbed, and a guide area (2) is provided in the fluid guide module, the guide area (2) is used to offset the external water flow, maintain the stability of the swirl flow field generated by the swirl blade (5), and thus realize the stable adsorption of the mobile adsorption device on the wall surface to be adsorbed; The fluid guide module comprises a guide ring (1), a suction cup housing (3) and a spring pin fixing plate (8); the spring pin fixing plate (8) is connected to the suction cup housing (3); the guide ring (1) is movably connected to the outer periphery of the suction cup housing (3) through an adjustable spring pin (10); the outer wall of the suction cup housing (3) is recessed inward, so that the outer wall of the suction cup housing (3) is an inwardly concave arc surface; the wall surface of the guide ring (1) close to the suction cup housing (3) is an outwardly convex arc surface; the wall surface of the guide ring (1) away from the suction cup housing (3) is a plane; the inwardly concave arc surface of the suction cup housing (3) and the outwardly convex arc surface of the guide ring (1) are The curvature of the arc surface is consistent, and a semi-circular guide area (2) is formed between the inner concave arc surface of the suction cup shell (3) and the outer convex arc surface of the guide ring (1). When the mobile adsorption device performs an adsorption process on the wall surface to be adsorbed, a part of the water flowing into the mobile adsorption device flows to the swirl blade (5), and a swirl flow field for adsorbing the wall surface is formed near the swirl blade (5). The other part of the water flows into the guide area (2). After passing through the guide area (2), the water flow direction is changed to form a water flow opposite to the external water flow, thereby offsetting the flow velocity of the external water flow, maintaining the stability of the swirl flow field, and further realizing the stable adsorption of the mobile adsorption device on the wall surface to be adsorbed.

2. The mobile adsorption device for use in high-velocity waters according to claim 1, characterized in that: The rolling contact module comprises a sponge washer (7) and an inner and outer ball group, both of which are connected to the lower surface of the outer periphery of the suction cup shell (3), and each ball group is mainly formed by a plurality of round balls (6) arranged closely along the circumference of the suction cup shell (3), and the round balls (6) in the outer ball group and the round balls (6) in the inner ball group are staggered, the sponge washer (7) is located on the outside of the ball group, and the sponge washer (7) is connected to the lower surface of the outer periphery of the suction cup shell (3), the sponge washer (7) and the ball group are used to isolate the external water flow flowing to the vicinity of the swirl blade (5), and when the mobile adsorption device is adsorbed on the wall to be adsorbed, the inner and outer round balls (6) can be rolled and attached to the wall to be adsorbed.

3. The mobile adsorption device for use in high-velocity waters according to claim 1, characterized in that: The adsorption module comprises an underwater sealed motor (4) and a swirl blade (5), wherein the housing of the underwater sealed motor (4) is fixedly mounted on the upper surface of the suction cup housing (3), the swirl blade (5) is located inside the suction cup housing (3), and the output shaft of the underwater sealed motor (4) and the swirl blade (5) are fixedly connected, and the underwater sealed motor (4) is used to drive the swirl blade (5) to rotate. After the swirl blade (5) rotates, it guides the water flow flowing into the suction cup housing (3) to form a swirl, and then performs underwater adsorption on the wall surface to be adsorbed through the swirl flow field.

4. The mobile adsorption device for use in high-velocity waters according to claim 1, characterized in that: The spring pin fixing plate (8) is arranged parallel to the upper surface of the suction cup housing (3). The outer periphery of the spring pin fixing plate (8) is mounted on the upper surface of the suction cup housing (3) via a circle of spring pins (9) so as to be movable up and down. The spring pins (9) are used to provide a buffering force during the movement of the adsorption device.

5. The mobile adsorption device for use in high-velocity waters according to claim 1, characterized in that: The two-ring ball groups in the rolling contact module are arranged outside the swirl blade (5) in the adsorption module to isolate the external water flow flowing near the swirl blade (5).

6. The mobile adsorption device for use in high-velocity waters according to claim 1, characterized in that: The guide ring (1) and the suction cup housing (3) are coaxially or eccentrically arranged, and the adjustable spring pin (10) is used to adjust the eccentricity between the guide ring (1) and the suction cup housing (3) to adapt to the water flow field under different working conditions.

7. The mobile adsorption device for use in high-velocity waters according to claim 1, characterized in that: In the diversion area (2), the inflow direction of the water flow is parallel to the upper surface of the suction cup shell (3), and the angle between the outflow direction of the water flow and the lower surface of the suction cup shell (3) is 10° to 20°.

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