Mobile adsorption device used under high-flow-speed water area

Abstract

The invention discloses a mobile adsorption device used under a high-flow-velocity water area. The adsorption module is fixedly installed in the middle of the fluid guiding module, the rolling contact module is fixedly connected to the bottom of the fluid guiding module, and swirl vanes in the adsorption module are used for guiding water flow to flow to form high-speed swirl and performing underwater adsorption on a wall surface to be adsorbed through pressure difference caused by the swirl. When the mobile adsorption device is adsorbed on a to-be-adsorbed wall surface, the rolling contact module is attached to the to-be-adsorbed wall surface in a rolling manner, and a flow guide area is arranged in the fluid guide module and is used for counteracting external water flow and maintaining the stability of a rotational flow field generated by the rotational flow blades in a high-flow-speed water area; and therefore, stable adsorption of the to-be-adsorbed wall surface by the movable adsorption device is realized. The device is simple in structure, convenient to install, high in durability, particularly suitable for rivers, lakes and coastal areas with high water flow speed, and capable of generating enough suction force in large-flow-speed water areas.

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] There are thousands of large and medium-sized hydropower stations in operation in my country, and the maintenance and overhaul of hydropower stations, especially the maintenance of water diversion and tailwater tunnels of large hydropower stations, has always been a difficult problem that has plagued the hydropower industry. The tunnel overhauls that have been carried out so far are all carried out under static water conditions. For example, some successful cases have shown the feasibility of long tunnel overhauls under static water conditions. However, due to technical limitations, there have been no cases of tunnel overhauls under flowing water conditions in China.

[0003] Many power stations cannot be shut down for tunnel maintenance due to various reasons, which makes it impossible to carry out maintenance in accordance with the national hydropower dam safety inspection requirements. For example, the tailwater tunnels of some hydropower stations have not been inspected since they were built for this reason. The rest of Huadian's power stations in the Wujiang River Basin are also facing similar problems.

[0004] At present, the mature application environment of traditional underwater operation equipment is mostly still water or low flow rate environment. Under high flow rate, existing equipment is difficult to work stably. Therefore, it is urgent to develop or modify an adsorption device that can be used under high flow rate conditions, which has become the key to solving this problem. Such an adsorption device needs to be able to firmly adhere to the tunnel wall in a high flow rate environment, thereby providing a stable working platform for the operation equipment. This technological breakthrough can not only meet the needs of daily maintenance of hydropower stations, but also ensure the safe operation of hydropower stations. 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-velocity waters, which can solve the problem of low working efficiency of adsorption devices in high-velocity waters in the prior art.

[0006] The technical solution adopted by the present invention is as follows:

[0007] The mobile adsorption device 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 blades in the adsorption module are used to guide the water flow to form a high-speed swirl, and the wall surface to be adsorbed is underwater adsorbed through 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 rolledly attached to the wall surface to be adsorbed, and a guide area is provided in the fluid guide module. The guide area is used to offset the external water flow and maintain the stability of the swirl flow field generated by the swirl blades in high-velocity waters, thereby realizing the stable adsorption of the mobile adsorption device on the wall surface to be adsorbed.

[0008] The fluid guide module comprises 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, the guide ring is movably connected to the outer periphery of the suction cup shell through an adjustable spring pin, the outer wall of the suction cup shell is recessed inwardly, 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 convex outwardly, 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-circular guide area is formed between the inner concave arc surface and the outer 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, and the other part of the water flows to the guide area. After passing through the guide area, the water flow changes its flow direction 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.

[0009] The rolling contact module includes a sponge gasket and inner and outer ball groups, both of which are connected to the lower surface of the outer circumference 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 inner ball group are staggered. The sponge gasket is located on the outside of the ball group, and the sponge gasket is connected to the lower surface of the outer circumference 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 blades. 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 swirl blades. The shell of the underwater sealed motor is fixedly installed on the upper surface of the suction cup shell. The swirl blades are located inside the suction cup shell, and the output shaft of the underwater sealed motor is fixedly connected to the swirl blades. The underwater sealed motor is used to drive the swirl blades to rotate. After the swirl blades rotate, 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 suction cup housing, and the outer periphery of the spring pin fixing plate is movably mounted on the upper surface of the suction cup housing through a circle of spring pins, and 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 eccentric distance 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 inflow water flow is parallel to the upper surface of the suction cup shell, and the angle between the flow direction of the outflow water flow and the lower surface of the suction cup shell is 10° to 20°.

[0015] The guide area is the cavity area 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 velocity 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 as possible to enter the guide area, which is a semicircular ring. The angle between the flow velocity 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 more obvious the protection of the guide area on the central flow field of the blade.

[0016] Through multiple fluid simulations, it can be seen that the protection effect of the diversion area on the internal vortex flow field and the suction force generated by the suction cup are mainly related to the water flow exit angle θ in the diversion area and the width d of the diversion area. If the water flow exit angle θ is too large, the water flow out of the diversion area will impact the wall surface adsorbed by the suction cup, thereby generating a recoil effect on the suction cup, reducing the suction force while also greatly reducing the adsorption stability. The simulation found that the effect is better when the water flow exit angle θ is 10°-20°. If the diversion area is too small, the protection effect is not obvious, and if it is too large, it will significantly increase the power consumption of the whole machine. Generally, the protection effect is better when the diversion area width d is 20-50mm.

[0017] The gap between the guide ring and the suction cup shell is adaptively adjusted: the guide ring is relatively fixed to the external frame, and the guide ring and the suction cup shell are connected by an adjustable spring pin, so that the width d of the guide area can be adjusted. When the water flow hits from one side, the external guide ring will not move because it is fixed to the frame, while the suction cup shell will move to a certain extent in the direction of the water flow due to the impact of the water flow. In this way, the suction cup gap can automatically adjust the width d of the guide area according to the impact direction and impact force of the water flow, and expand a larger guide gap when the total outer diameter of the suction cup is constant.

[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 to generate 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 of the device more flexible.

[0020] 2. The fluid guide module of the present invention is designed to optimize the path of water flow through the adsorption device, improve the adsorption efficiency and reduce the impact of water flow on the adsorption module. The device has a simple structure, is easy to install, and has strong durability. It is particularly suitable for rivers, lakes and coastal areas with fast water flow, and can generate sufficient suction in high-flow 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 is a cross-sectional view of the outer shell of the adsorption device;

[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 front 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 in conjunction with specific implementation cases. The following implementation cases will help those skilled in the art to further understand the present invention, but will 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, 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 the wall surface to be adsorbed is underwater adsorbed through 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. A guide area 2 is provided in the fluid guide module, and 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 the stable adsorption of the mobile adsorption device on the wall surface 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, 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 inwardly, 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 convex outwardly, 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-circular 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, and the other part of the water flows into the guide area 2. After passing through the guide area 2, the water flow changes its flow direction 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, both of which are connected to the lower surface of the outer periphery of the suction cup shell 3. Each ball group is mainly formed by 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 installed 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 movably mounted on the upper surface of the suction cup housing 3 through a circle of spring pins 9, and 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 on the outer side of 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, so as to adapt to the water flow field under different working conditions.

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

[0038] The fluid guide module includes a guide ring 1 and a suction cup housing 3. The guide area 2 is a 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 part of the water flow will flow to the guide area 2, and after passing through the guide area 2, a water flow in the opposite direction of the external interference flow field will be 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 blade 5. The shape of the guide area 2 has been specially designed, and the edge shape of the guide ring 2 of the suction cup housing 3 will allow as much water flow as possible to enter the guide area, which is a semicircular ring, and the angle between the flow velocity of the water flow 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 flow 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. No matter how the ordinary single-circle circular ball arrangement is arranged, there will be gaps that cause water to flow in. However, 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 is in direct contact with the wall to be adsorbed. The densely distributed circular balls can resist 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 a flexible movement effect 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 velocity.

[0040] The spring pin fixing plate 8 is connected to the swirl blade 5 and the sealing motor 4, and is connected to the suction cup housing 3 through the spring pin 9. The spring pin 9 installed here has multiple functions. First, after the spring pin 9 is pressed, if an uneven ground is encountered during the mobile adsorption process, the spring pin 9 can be used as an adaptive device to keep the round ball 6 close to the ground. Second, when the adsorption device is subjected to an instantaneous upward load, due to the presence of the spring pin 9, the housing will continue to be close to the wall for a short time before separating. The buffer time provided by the spring pin 9 can provide response time for the external suction cup control system to adjust the speed to cope with the external load. The gap in the diversion area 2 is increased, and more water flow is introduced, which can achieve a better diversion effect. However, if the gap is increased by increasing the diameter of the suction cup housing 3, it will cause the suction cup power load to increase, which is not worth the loss. The guide ring 1 and the suction cup housing 3 are also connected through a set of adjustable pins 10. When the mobile adsorption device is disturbed by a circumferentially uniform flow velocity, the guide ring 1 can be fixed concentrically with the suction cup housing 3 through the adjustable pin 10. Figure 6 However, when the mobile adsorption device is subjected to only one-way load, the guide ring 1 and the suction cup housing 3 can be eccentrically fixed by the adjustable pin 10. Figure 6 Right, this can make the gap of the guide area 2 on the side affected by the flow field larger, so as to achieve a better effect of protecting the flow field. The design of the adjustable 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions 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 in that: 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 the pressure difference caused by the swirl is used to perform underwater adsorption on the wall surface to be adsorbed; 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; a guide area (2) is provided in the fluid guide module, and 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), thereby realizing stable adsorption of the mobile adsorption device on the wall surface to be adsorbed.

2. A mobile adsorption device for use in high-velocity waters according to claim 1, characterized in that: The fluid guide module comprises 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); the guide ring (1) is movably 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 inwardly, 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 protruding outwardly; 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 The curvature of the arc-shaped surfaces is consistent, and a semi-circular guide area (2) is formed between the inner concave arc-shaped surface of the suction cup shell (3) and the outer convex arc-shaped 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 blades (5), and a swirl flow field for adsorbing the wall surface is formed near the swirl blades (5). The other part of the water flows to the guide area (2). After passing through the guide area (2), the water flow changes its flow direction 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 achieving stable adsorption of the mobile adsorption device on the wall surface to be adsorbed.

3. The mobile adsorption device for use in high-velocity waters according to claim 2, characterized in that: The rolling contact module comprises a sponge washer (7) and inner and outer ball groups, both of which are connected to the lower surface of the outer periphery of the suction cup shell (3), each ball group is mainly formed by a plurality of round balls (6) closely 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 arranged in a staggered manner, 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 both 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.

4. The mobile adsorption device for use in high-velocity waters according to claim 2, 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) is fixedly connected to the swirl blade (5), 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.

5. The mobile adsorption device for use in high-velocity waters according to claim 2, characterized in that: The spring pin fixing plate (8) is arranged parallel to the upper part 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.

6. The mobile adsorption device for use in high-velocity waters according to claim 2, characterized in that: The two-circle 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).

7. The mobile adsorption device for use in high-velocity waters according to claim 2, 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.

8. The mobile adsorption device for use in high-velocity waters according to claim 2, 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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