Rubber ball collecting net

Abstract

The utility model provides a rubber ball collecting net. Comprising a barrel, a gear set arranged on the outer side of the barrel and used for power transmission, and two rotating shaft assemblies connected with the gear set, penetrating through the barrel and used for transmitting rotating motion of the gear set to a grid mesh. The driving structure is connected with the other end of the rotating shaft assembly and used for driving the rotating shaft assembly to rotate; and the grid mesh is arranged on the rotating shaft assembly, located in the barrel and used for intercepting rubber balls and conveying the rubber balls to a ball collecting opening. According to the utility model, the driving mode is changed, the synchronism is stronger due to the meshed gear set, and the opening degree of the grid mesh is consistent; meanwhile, the grid mesh rotates flexibly, and the ball collecting rate is effectively improved.

Description

Technical Field

[0001] This utility model belongs to the field of power generation equipment manufacturing technology, and relates to a ball collection net for a continuous cleaning system of rubber balls in the circulating cooling water system of the condenser in the steam turbine island of a thermal power plant. Background Technology

[0002] The condenser is a key component for condensing exhaust steam from a steam turbine and must maintain a high vacuum to ensure power generation efficiency. If its internal structure is blocked by scale, corrosion, or biological sludge, the heat exchange efficiency will decrease, leading to increased turbine back pressure, increased energy consumption, and even threatening the safe operation of the unit.

[0003] The ball cleaning system removes scale by introducing balls into the condenser circulating water system and utilizing the friction between the balls and the inner wall of the heat exchange tubes. The balls are then collected by a ball collection net and reused. As a critical node in the ball circulation process, the ball collection net must efficiently collect the balls (recovery rate ≥95%) while preventing ball escape or blockage, ensuring long-term stable system operation. If the two grids do not close consistently or tightly, or if the rotating shaft becomes sluggish due to corrosion or impurity buildup, the ball retention rate will increase.

[0004] Therefore, it is crucial to provide a ball-collecting net that ensures consistent grid opening and flexible grid rotation. Utility Model Content

[0005] In view of the problems existing in the prior art, this utility model provides a ball-catching net.

[0006] One type of ball-catching net includes:

[0007] cylindrical body;

[0008] A gear set for power transmission is provided on the outside of the cylinder;

[0009] Two rotating shaft assemblies connected to the gear set and passing through the cylinder are used to transmit the rotational motion of the gear set to the grid.

[0010] A drive structure connected to the other end of the rotating shaft assembly for driving the rotating shaft assembly to rotate;

[0011] And a grid set on the rotating shaft assembly and located inside the cylinder for intercepting rubber balls and conveying them to the ball receiving port.

[0012] Based on the above scheme, the gear set includes:

[0013] The first and second gears are meshed.

[0014] Based on the above scheme, the gear set further includes a gear cover provided on the cylinder to protect the first gear and the second gear.

[0015] Based on the above solution, the rotating shaft assembly includes:

[0016] Shaft;

[0017] A first bearing seat is provided at one end of the rotating shaft near the gear set for mounting the rotating shaft onto the cylinder;

[0018] A second bearing seat is provided at one end of the rotating shaft near the drive structure for mounting the rotating shaft onto the cylinder.

[0019] Based on the above scheme, the grid includes:

[0020] The first and second screen plates are set relative to each other;

[0021] A ball-collecting funnel is provided at the bottom of the first and second net plates for collecting balls;

[0022] A funnel-shaped ball-receiving opening is provided at the bottom of the ball-receiving funnel;

[0023] And a volleyball outlet tube connected to the ball inlet of the funnel.

[0024] Based on the above scheme, a grid connecting sleeve for connecting the rotating shaft is provided on the back plate of both the first and second grid plates.

[0025] Based on the above scheme, the ball receiving funnel includes a first funnel and a second funnel, and the bottoms of the first funnel and the second funnel are connected to the ball receiving port of the funnel.

[0026] Based on the above scheme, it also includes: a sensor installed on the cylinder for monitoring the ball recovery rate or grid resistance.

[0027] Based on the above scheme, the number of the rubber ball outlet tubes is two, and the two rubber ball outlet tubes are arranged in the same direction or opposite to each other on the ball receiving port of the funnel.

[0028] Compared with existing technologies, this invention changes the driving method through the arrangement of gear sets and drive structures. The meshing gear sets result in stronger synchronization, ensuring consistent grid opening. Simultaneously, the grid rotates flexibly, with equal gaps on both sides. Furthermore, the ball-collecting funnel of this invention is multi-zoned, effectively improving the ball-collecting rate and smoothness. In addition, the systems and components included in this invention are easy to purchase and assemble, resulting in low production costs. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the ball-collecting net of this utility model;

[0030] Figure 2 for Figure 1Sectional view along axis AA;

[0031] Figure 3 This is a top view of the ball-collecting net of this utility model;

[0032] Figure 4 This is a schematic diagram of the structure of the ball-collecting net of this utility model (the cylinder is not shown).

[0033] Figure 5 This is a schematic diagram of the structure of the ball-collecting net of the present invention (the cylinder is not shown, but the first gear and the second gear are shown).

[0034] Figure 6 This is a schematic diagram of the structure of the ball-collecting net of this utility model (showing the rotating shaft assembly).

[0035] Figure 7 This is a schematic diagram of the structure of the ball-collecting net of this utility model (showing two ball-out tubes).

[0036] Figure 8 This is a schematic diagram of the structure of the ball-collecting net of this utility model (showing a top view of two ball-outlet tubes). Detailed Implementation

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments described below are intended to facilitate the understanding of the present invention and do not limit it in any way.

[0038] like Figures 1-4 As shown, this utility model provides a ball-collecting net, including a cylinder 1, a gear set 2 disposed on the outside of the cylinder 1 for power transmission (transmitting the rotational power of the drive device to the rotating shaft through gear meshing to achieve torque and speed matching, such as deceleration or acceleration), two rotating shaft assemblies 3 connected to the gear set 2 and passing through the cylinder 1 for transmitting the rotational motion of the gear set to the grid, a drive structure 4 connected to the other end of the rotating shaft assembly 3 for driving the rotating shaft assembly 3 to rotate, and a grid 5 disposed on the rotating shaft assembly 3 and located inside the cylinder 1 for intercepting the ball and conveying it to the ball-collecting port.

[0039] In use, the drive structure 4 drives the far end (non-gear end) of the shaft assembly 3, and transmits power to the near end of the shaft assembly 3 through the gear set 2. After the gear set 2 adjusts the speed and direction, it drives the shaft assembly 3 to rotate. The shaft assembly 3 drives the grid 5 to rotate, intercepting the rubber balls through the mesh and transporting them to the ball receiving port.

[0040] like Figure 5As shown, in a specific embodiment, the gear set 2 includes a first gear 2-1 and a second gear 2-2 meshing together. Preferably, high-precision gears (such as involute gears) are used to reduce meshing clearance and avoid transmission jamming or slippage. Furthermore, to protect the first gear 2-1 and the second gear 2-2, a gear cover 2-3 is also included on the cylinder 1 to protect the first gear 2-1 and the second gear 2-2.

[0041] like Figure 6 As shown in the illustration, in a specific embodiment, the rotating shaft assembly 3 includes a rotating shaft 3-1, a first bearing seat 3-2 disposed at one end of the rotating shaft 3-1 near the gear set 2 for mounting the rotating shaft 3-1 onto the cylinder 1, and a second bearing seat 3-3 disposed at one end of the rotating shaft 3-1 near the drive structure 4 for mounting the rotating shaft 3-1 onto the cylinder 1. One end of the rotating shaft 3-1 is connected to either the first gear 2-1 or the second gear 2-2, and the other end of the rotating shaft 3-1 is connected to the drive structure 4.

[0042] As a specific implementation, the drive structure 4 can be a motor actuator or a hydraulic actuator to drive the rotating shaft and adjust the speed of the grid 5 (e.g., start / stop, forward / reverse rotation). The motor actuator or hydraulic actuator can receive control system signals (e.g., timing or differential pressure feedback) to precisely control the rotation frequency of the grid 5 and match the cleaning cycle of the rubber balls. To protect the drive structure 4, an overload protection mechanism can also be built in to prevent the motor from burning out due to grid jamming.

[0043] In one specific implementation, the grid 5 includes a first grid plate 5-1 and a second grid plate 5-2 arranged opposite to each other, a ball-collecting funnel 5-3 for collecting balls disposed at the bottom of the first grid plate 5-1 and the second grid plate 5-2, a funnel ball-receiving port 5-4 disposed at the bottom of the ball-collecting funnel 5-3, and a ball-out tube 5-5 for volleyballs connected to the funnel ball-receiving port 5-4. The back plates of both the first grid plate 5-1 and the second grid plate 5-2 are provided with grid connecting sleeves 5-6 for connecting to the rotating shaft 3-1. To improve the support of the first grid plate 5-1 and the second grid plate 5-2, several ribs are provided at their rear.

[0044] To improve the ball collection rate, the ball collection funnel 5-3 includes a first funnel 5-3-1 and a second funnel 5-3-2, the bottoms of the first funnel 5-3-1 and the second funnel 5-3-2 are connected to the ball receiving port 5-4 of the funnel.

[0045] like Figures 7-8As shown, depending on the specific setup, four or eight funnels can be added to improve the ball collection rate and flow rate. To further improve the ball recovery rate, two ball outlet pipes 5-5 are also provided on the ball receiving port 5-4 of the funnel, either in the same direction or opposite directions. This design allows the two ball outlet pipes 5-5 to cover a wider ball collection area, reducing the retention or accumulation of balls in the ball collection net, especially for high-flow or complex flow conditions. Moreover, the multi-outlet pipe layout can match the water flow direction, reducing the circulation resistance of the balls in the ball collection net. The multi-outlet pipes allow the balls to be discharged from different positions, adapting to the limitations of on-site pipeline layout. The dispersed outlet pipes can avoid single-point blockage, and together with the forced recovery mechanism (such as a screw conveyor), the balls can be directly pushed to the pump inlet, reducing the dependence on the ball pump output and extending the equipment life. It can also improve the backwashing effect. The multi-outlet pipe structure is usually combined with the movable screen design to form a backwashing channel in the non-ball collection state, removing impurities from the screen and maintaining cleanliness.

[0046] To further improve the automatic control of the device, it also includes: a sensor installed on the cylinder 1 to monitor the ball recovery rate or grid resistance, which feeds back to the control system to adjust the speed of the drive structure 4.

[0047] In use, the rubber balls and water flow enter the cylinder 1 through the ball inlet 6. The gap between the first mesh plate 5-1 and the second mesh plate 5-2 is only wide enough for water to pass through, but the rubber balls cannot. After the water flows through the first mesh plate 5-1 and the second mesh plate 5-2, the rubber balls will be filtered onto the first mesh plate 5-1 and the second mesh plate 5-2, and then carried by the water flow into the ball collection funnel 5-3. When the drive structure 4 drives the rotating shaft 3-1 to rotate, it transports the rubber balls to the rubber ball outlet pipe 5-5. The tops of the first mesh plate 5-1 and the second mesh plate 5-2 are in close contact with the inner wall of the cylinder 1 when in the working position. There are two rotating shafts 3-1, both located at the center of the symmetrically arranged first mesh plate 5-1 and second mesh plate 5-2. Two drive structures 4 are connected to two rotating shafts 3-1 respectively, used to drive the first net plate 5-1 and the second net plate 5-2 to rotate. During the operation of the ball-collecting net, water flows from top to bottom inside the net, generating a large fluid thrust. The first net plate 5-1 and the second net plate 5-2 require a large power of drive structure 4 during opening and closing. By setting the rotating shaft 3-1 in the middle of the first net plate 5-1 and the second net plate 5-2, the fluid thrust of the upper and lower parts of the first net plate 5-1 and the second net plate 5-2 divided by the rotating shaft 3-1 can be balanced by calculation. The force-bearing area is symmetrical. When the rotating shaft 3-1 is set in this position, the required drive power is smaller.

[0048] The ball outlet pipe 5-5 is set on the ball collection funnel 5-3 and located at one end outside the cylinder 1. This setting allows the ball outlet pipe 5-5 to be arranged in any direction according to the site requirements. At the same time, it can reduce the height of the ball collection net, reduce the actual cost, and make it easier to arrange the ball collection net on site.

[0049] The first mesh plate 5-1 and the second mesh plate 5-2 have the same inclination angle. When the fluid enters the ball collection net area from upstream, it can smoothly enter the funnel area formed by the symmetrically arranged first mesh plate 5-1 and second mesh plate 5-2.

[0050] like Figure 4 As shown, the distance A between the bottom of the water-facing surfaces of the symmetrically arranged first net plate 5-1 and second net plate 5-2 is less than the opening distance B (i.e. the length of the wide side of the strip-shaped ball inlet) on the first net plate 5-1 and second net plate 5-2. This arrangement allows the rubber balls on the first net plate 5-1 and second net plate 5-2 to reliably enter the ball collecting funnel 5-3 and be sent to the rubber ball outlet tube 5-5 under the action of the drive structure 4.

[0051] Working principle: When the system is running, the first net plate 5-1 and the second net plate 5-2 are in the ball collection position. At this time, the upper parts of the first net plate 5-1 and the second net plate 5-2 are close to the inner wall of the cylinder 1. The symmetrically arranged first net plate 5-1 and the second net plate 5-2 form a common water-facing surface, forming a ball collection area. The balls are blocked by the first net plate 5-1 and the second net plate 5-2 and enter the ball collection funnel 5-3 from the strip-shaped ball inlet below the first net plate 5-1 and the second net plate 5-2. The balls are pushed into the ball outlet pipe 5-5, and then the balls will be recycled back into the cleaning system for reuse.

[0052] When not collecting balls, the drive structure 4 drives the two rotating shafts 3-1 to move. The action on the rotating shafts 3-1 causes the first mesh plate 5-1 and the second mesh plate 5-2 to move towards each other. At this time, the symmetrically arranged first mesh plate 5-1 and second mesh plate 5-2 are aligned with the axis of the cylinder 1. This can reduce water flow resistance and use water flow to backwash the first mesh plate 5-1 and second mesh plate 5-2, achieving a clean flow field on the working surface of the grid plate and ensuring ball collection efficiency.

[0053] The design of the ball collection net of this utility model is more reasonable, with a theoretical ball recovery rate of 100%. The ball circulation speed in the cleaning system is faster, the ball outlet arrangement is more flexible, greatly simplifying the on-site layout. The selection of external actuators is more flexible, and the movable mesh plate automatically completes the cleaning when not in operation.

[0054] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A ball-catching net, characterized in that, The utility model relates to a kind of ball recovery device, including: Cylinder (1); Gear set (2) for power transmission is arranged outside the cylinder (1); Two rotating shaft assemblies (3) for transmitting the rotating motion of gear set to grid are connected with gear set (2) and pass through cylinder (1); Drive structure (4) for driving rotating shaft assembly (3) rotation is connected with the other end of rotating shaft assembly (3); And grid (5) for intercepting rubber ball and conveying it to ball collecting port is arranged on rotating shaft assembly (3) and located in cylinder (1).

2. The pinball catch net of claim 1, wherein, The gear set (2) includes: Meshing arranged first gear (2-1) and second gear (2-2).

3. The pinball catch net of claim 2 wherein, The gear set (2) further includes: gear cover (2-3) for protecting first gear (2-1) and second gear (2-2) is arranged on cylinder (1).

4. The rubber ball collection net according to claim 1, wherein The rotating shaft assembly (3) includes: Rotating shaft (3-1); First shaft seat (3-2) for mounting rotating shaft (3-1) on cylinder (1) is arranged on the end of rotating shaft (3-1) close to gear set (2); And second shaft seat (3-3) for mounting rotating shaft (3-1) on cylinder (1) is arranged on the end of rotating shaft (3-1) close to drive structure (4).

5. The rubber ball collection net according to claim 3, wherein The grid (5) includes: Oppositely arranged first screen plate (5-1) and second screen plate (5-2); Ball collecting funnel (5-3) for collecting ball is arranged at the bottom of first screen plate (5-1) and second screen plate (5-2); Funnel ball collecting port (5-4) is arranged at the bottom of ball collecting funnel (5-3); And rubber ball leading pipe (5-5) for ball discharge is connected with the funnel ball collecting port (5-4).

6. The rubber ball collection net according to claim 5, wherein Grid connecting sleeve (5-6) for connecting rotating shaft (3-1) is arranged on the back plate of first screen plate (5-1) and second screen plate (5-2).

7. The rubber ball collection net according to claim 5, wherein The ball collecting funnel (5-3) includes first funnel (5-3-1) and second funnel (5-3-2), and the bottom of the first funnel (5-3-1) and the second funnel (5-3-2) is communicated with the funnel ball collecting port (5-4).

8. The rubber ball collection net according to claim 1, wherein Further including: Sensor for monitoring rubber ball recovery rate or grid resistance is arranged on the cylinder (1).

9. The rubber ball collection net according to claim 5, wherein The number of rubber ball leading pipe (5-5) is two, two rubber ball leading pipes (5-5) are arranged on the funnel ball collecting port (5-4) in the same direction or opposite directions.

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