A flow guide cone capable of self-adjusting the inlet flow state of a water pump and a method for adjusting the inlet flow state

Abstract

The present invention relates to a flow guide cone capable of self - adjusting the inlet flow pattern of a water pump and a method for adjusting the inlet flow pattern, including a flow guide cone arranged on a bulb tubular turbine pump; the flow guide cone includes a water - carrying ball, a flow guide plate slot, a flow guide plate, and a flow guide cone housing. The inner wall of the flow guide cone housing is provided with a plurality of flow guide plate slots, and each flow guide plate slot is inserted with a flow guide plate. The flow guide plate can move on the flow guide plate slot and can partially move outside the flow guide cone housing; the water - carrying ball is placed inside the flow guide cone housing and is located between a plurality of flow guide plates; one end of the flow guide cone housing is open, and the inlet of the water - carrying ball is connected to the opening of the flow guide cone housing. Through the present invention, the flow pattern of the inlet flow passage of the bulb tubular turbine pump device can be improved, and the noise and vibration caused by the increase in flow rate when the water pump is started can be reduced. The present invention can be used to guide the flow field of the fluid when passing through the elbow according to different opening degrees of the water pump start - up valve, weaken the range and intensity of the vortex area, and inhibit the generation of shedding vortices.

Description

Technical Field

[0001] The present invention relates to a flow guide cone capable of self - adjusting the flow state at the water pump inlet and a method for adjusting the inlet flow state, belonging to the technical field of water conservancy engineering. Background Art

[0002] The bulb tubular pump device can achieve a relatively high device efficiency in low - lift and large - flow pumping stations. The quality of the flow state in the inlet passage of the bulb tubular pump is directly related to the operation state of the unit. Turbulent flow in the inlet passage will significantly reduce the energy performance and cavitation performance of the water pump, and may also cause vibration and noise of the water pump unit. Prolonged like this will shorten the service life of the equipment.

[0003] Regarding the problem of increased vibration caused by the deterioration of the flow field at the water pump inlet, there are usually methods such as optimizing the inlet passage. Existing literature mostly studies the external shape of the inlet passage of the pumping station. Reasonable shape design can improve the uniformity of the flow field at the water pump inlet and prevent cavitation of the water pump.

[0004] The flow guide cone is a key water - inlet flow - through component of the bulb tubular pump device, and its function is to adjust the flow state of the water flowing forward to the water pump and provide good water - inlet conditions for the water pump. The quality of the flow guide cone performance has an important impact on the hydrodynamic characteristics such as the hydraulic performance and energy characteristics of the bulb tubular pump device.

[0005] At present, with the change of climate, the water - inlet water level, incoming flow rate and incoming flow state of the pumping station have changed greatly. The original flow guide cone can no longer meet the requirements of the current stage and cannot effectively improve the flow state. Therefore, there is an urgent need for a water - guide cone device that can actively adjust the water flow state according to the incoming flow conditions. Summary of the Invention

[0006] The purpose of the present invention is to solve the deficiencies of the existing technology and provide a flow guide cone capable of self - adjusting the flow state at the water pump inlet and a method for adjusting the inlet flow state.

[0007] In order to achieve the above - mentioned invention purpose, the technical solution adopted by the present invention is as follows: A flow guide cone capable of self - adjusting the flow state at the water pump inlet, including a flow guide cone arranged on the bulb tubular pump; characterized in that:

[0008] The flow guide cone includes a water - carrying ball, a guide - plate slot, a guide plate, and a flow - guide - cone housing. The inner wall of the flow - guide - cone housing is provided with a number of guide - plate slots, and each guide - plate slot is inserted with a guide plate. The guide plate can move on the guide - plate slot and can partially move outside the flow - guide - cone housing; the water - carrying ball is placed inside the flow - guide - cone housing and is located between a number of guide plates; one end of the flow - guide - cone housing is open, and the inlet of the water - carrying ball is connected to the opening of the flow - guide - cone housing.

[0009] The flow deflector is a semi-circular crescent-shaped flow deflector; the flow deflector slot is a semi-circular crescent-shaped flow deflector slot that matches the flow deflector.

[0010] The water-carrying ball is a silicone water-carrying ball.

[0011] The width of the flow deflector is 0.135D to 0.165D, where D is the bottom diameter of the flow guiding cone; the thickness of the flow deflector is 5 mm to 10 mm, and the thickness of the flow deflector slot is 2 mm larger than the thickness of the flow deflector.

[0012] The number of the flow deflector slots is 4. The 4 flow deflector slots are evenly arranged on the inner wall of the flow guiding cone housing, and 1 flow deflector is inserted into each flow deflector slot.

[0013] A method for adjusting the inlet flow state of a flow guiding cone that can self-adjust the inlet flow state of a water pump, characterized in that:

[0014] Install the flow guiding cone that can self-adjust the inlet flow state of the water pump on the bulb tubular turbine pump. There is a bulb tubular turbine pump motor in the bulb tubular turbine pump. There is a bulb tubular turbine pump motor shaft on the bulb tubular turbine pump motor. A sealing waterproof ring is arranged at the connection between the flow guiding cone housing and the bulb tubular turbine pump motor shaft to prevent water flow from entering the inside of the bulb tubular turbine pump;

[0015] When the incoming water pressure is high, the water flow enters the water-carrying ball and squeezes and expands, pushing the flow deflector in the flow deflector slot outwards along the flow deflector slot. Several flow deflectors are pushed to the outside of the flow guiding cone housing, thereby optimizing the incoming flow state and making the water flow transition smoothly;

[0016] When the incoming flow rate decreases, the internal water pressure of the water-carrying ball decreases to its pressure resistance strength and below. The water pressure borne by the flow deflector is greater than the internal water pressure of the water-carrying ball. The flow deflector is pushed back into the flow deflector slot by the incoming flow, and the self-retraction and release of the flow deflector are realized by using the water pressure, so as to achieve optimized operation.

[0017] The semi-circular crescent-shaped flow deflector has a streamlined shape for adjusting the incoming flow state and improving the overall efficiency of the water pump.

[0018] The water-carrying ball is a silicone water-carrying ball, and the silicone water-carrying ball can absorb a certain volume of pressurized water flow according to its water resistance and pressure resistance.

[0019] There are also pre-guide vanes and an impeller. After the incoming flow is made uniform by the flow deflector, it passes through the pre-guide vanes for further rectification and then flows to the impeller to improve the impeller efficiency.

[0020] The structure of the present invention is simple, easy to manufacture and convenient to use. Through the present invention, a flow guide cone capable of self-adjusting the flow state at the inlet of a water pump and a method for adjusting the flow state at the inlet are provided. The structure includes a bulb tubular turbine pump, and a flow guide cone is arranged on the bulb tubular turbine pump. Four semi-circular flow guide plates and a water-carrying ball made of silica gel material are arranged inside the flow guide cone. The inlet of the water-carrying ball made of silica gel material is connected to the outer shell of the flow guide cone.

[0021] The silica gel water-carrying ball changes its volume according to the flow rate change. It has high water resistance, adsorption, pressure resistance and a long service life.

[0022] When the flow rate of the incoming water at the pumping station is large and the incoming water pressure is high, the water flow enters the water-carrying ball and squeezes and expands, pushing the semi-circular flow guide plates in the card slots outwards along the card slots. The four semi-circular flow guide plates are pushed to the outside of the outer shell of the flow guide cone.

[0023] The width of the semi-circular flow guide plate can be set in the range of 0.135D to 0.165D, where D is the bottom diameter of the flow guide cone; the thickness can be set in the range of 5 mm to 10 mm, and the thickness of the card slot is processed to be the thickness of the semi-circular flow guide plate + 2 mm.

[0024] The streamline of the semi-circular flow guide plate is used to adjust the incoming water flow state and improve the overall efficiency of the water pump. Beneficial effects

[0025] The present invention can improve the flow state at the inlet of the water pump of the bulb tubular turbine pump device and reduce the noise and vibration caused by the increase in flow rate when the water pump is started. The present invention can improve the flow field at the inlet of the water pump according to different incoming water levels and flow rates, weaken the range and intensity of the vortex area, and inhibit the generation of shedding vortices.

[0026] It can realize the optimized start-up operation of the bulb tubular turbine pump, effectively change the velocity triangle at the inlet of the impeller, improve the water flow velocity circulation, and play a rectifying role. At the same time, it will also reduce the appearance of vortices around the inlet section, inhibit the occurrence of cavitation, and improve the efficiency of the pump device. The present invention is applied to the bulb tubular turbine pump, which can effectively improve the operation efficiency of the pump device. Description of the drawings

[0027] Figure 1 is the structural schematic diagram of the present invention;

[0028] Figure 2 is the structural schematic diagram of the flow guide plate in the present invention.

[0029] In the figure: 1 water-carrying ball, 2 flow guide plate card slot, 3 flow guide plate, 4 flow guide cone outer shell, 5 pre-guide vane, 6 bulb tubular turbine pump motor shaft, 7 impeller, 8 sealing waterproof ring. Embodiment

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] Please refer to Figure 1 As shown, a flow guide cone capable of self-adjusting the flow state at the inlet of a water pump includes a flow guide cone arranged on a bulb tubular turbine pump; the flow guide cone includes a water-carrying ball 1, a flow guide plate slot 2, a flow guide plate 3, and a flow guide cone housing 4. A plurality of flow guide plate slots 2 are arranged on the inner wall of the flow guide cone housing 4, and a flow guide plate 3 is inserted into each flow guide plate slot 2. The flow guide plate 3 can move on the flow guide plate slot 2 and can partially move outside the flow guide cone housing 4; the water-carrying ball 1 is placed inside the flow guide cone housing 4 and is located between a plurality of flow guide plates 3; one end of the flow guide cone housing 4 is open, and the inlet of the water-carrying ball 1 is connected to the opening of the flow guide cone housing 4.

[0032] Among them, the flow guide plate 3 is a semi-circular flow guide plate; the flow guide plate slot 2 is a semi-circular flow guide plate slot matching the flow guide plate 3. The water-carrying ball 1 is a silica gel water-carrying ball. The width of the flow guide plate 3 is 0.135D to 0.165D, where D is the bottom diameter of the flow guide cone; the thickness of the flow guide plate 3 is 5 mm to 10 mm, and the thickness of the flow guide plate slot 2 is 2 mm larger than the thickness of the flow guide plate 3. The number of the flow guide plate slots 2 is 4, and the 4 flow guide plate slots 2 are evenly arranged on the inner wall of the flow guide cone housing 4, and 1 flow guide plate 3 is inserted into each flow guide plate slot 2.

[0033] Four flow guide plate slots 2 are arranged on the flow guide cone housing 4, and four flow guide plates 3 are clamped in the 4 flow guide plate slots 2.

[0034] A water-carrying ball 1 is arranged inside the flow guide cone, and its water inlet is connected to the flow guide cone housing 4. The silica gel water-carrying ball can absorb a certain volume of pressurized water flow according to its water resistance and pressure resistance.

[0035] A sealing waterproof ring 8 is arranged at the connection between the flow guide cone housing 4 and the pump motor shaft 6 of the bulb tubular turbine pump to prevent water flow from entering the inside of the bulb tubular turbine pump.

[0036] The incoming flow is evenly distributed by the semi-circular flow guide plate 3 and then passes through the pre-guide vane 5 for further rectification and flows towards the impeller 7, improving the impeller efficiency.

[0037] Please refer to Figure 1 、 2 As shown, the working process of a flow guide cone capable of self-adjusting the flow state at the inlet of a water pump in this embodiment is as follows:

[0038] At different opening degrees of the water pump starting valve:

[0039] When the valve opening is large, according to the relatively high water pressure of the incoming flow, the water-carrying ball 1 is filled with the incoming flow inside. The internal pressure causes the water-carrying ball 1 to expand, squeezing the flow guide plate 3 located in the flow guide plate slot 2. The flow guide plate 3 is pressed out of the flow guide cone housing 4, optimizing the flow pattern of the incoming flow and enabling the water flow to transition smoothly. When the valve opening is reduced according to the operating conditions of the water pump, the incoming flow rate decreases, and the internal water pressure of the water-carrying ball 1 decreases to its pressure resistance strength and below. The water pressure borne by the flow guide plate 3 is greater than the internal water pressure of the water-carrying ball 1, and the flow guide plate 3 is pushed back into the flow guide plate slot 2 by the incoming flow. The self-retraction and extension of the flow guide plate can be achieved by using the water pressure, realizing optimized operation, effectively improving the flow pattern at the water pump inlet of the bulb tubular pump device, reducing the noise and vibration caused by the increased flow rate during the start-up of the water pump, and improving the efficiency of the pump device.

Claims

1. A flow guide cone capable of self - adjusting the inlet flow state of a water pump, including a flow guide cone arranged on a bulb tubular turbine pump; characterized in that: The flow guide cone includes a water - carrying ball (1), a flow guide plate slot (2), a flow guide plate (3), and a flow guide cone housing (4). On the inner wall of the flow guide cone housing (4), there are several flow guide plate slots (2). Each flow guide plate slot (2) is inserted with a flow guide plate (3). The flow guide plate (3) can move on the flow guide plate slot (2) and can partially move outside the flow guide cone housing (4). The water - carrying ball (1) is placed inside the flow guide cone housing (4) and is located between several flow guide plates (3). One end of the flow guide cone housing (4) is open, and the inlet of the water - carrying ball (1) is connected to the opening of the flow guide cone housing (4).

2. The flow guiding cone capable of self-adjusting the inlet flow pattern of a water pump according to claim 1, wherein: The flow guide plate (3) is a semi - lunar - shaped flow guide plate; the flow guide plate slot (2) is a semi - lunar - shaped flow guide plate slot matching the flow guide plate (3).

3. A flow guiding cone capable of automatically adjusting the inlet flow pattern of a water pump according to claim 1, characterized in that: The water - carrying ball (1) is a silica gel water - carrying ball.

4. A flow guiding cone capable of self-adjusting the inlet flow pattern of a water pump according to claim 2, characterized in that: The width of the flow guide plate (3) is 0.135D - 0.165D, where D is the bottom diameter of the flow guide cone; the thickness of the flow guide plate (3) is 5 mm - 10 mm, and the thickness of the flow guide plate slot (2) is 2 mm larger than the thickness of the flow guide plate (3).

5. The flow guiding cone capable of self-adjusting the inlet flow pattern of the water pump according to claim 2, characterized in that: The number of the flow guide plate slots (2) is 4. The 4 flow guide plate slots (2) are evenly arranged on the inner wall of the flow guide cone housing (4), and each flow guide plate slot (2) is inserted with 1 flow guide plate (3).

6. A method for adjusting the inlet flow state by using the flow guide cone capable of self - adjusting the inlet flow state of a water pump according to any one of claims 1 - 5, characterized in that: Install the flow guide cone capable of self - adjusting the inlet flow state of a water pump on a bulb tubular turbine pump. There is a bulb tubular turbine pump motor inside the bulb tubular turbine pump, and a bulb tubular turbine pump motor shaft (6) is arranged on the bulb tubular turbine pump motor. A sealing waterproof ring (8) is arranged at the connection between the flow guide cone housing (4) and the bulb tubular turbine pump motor shaft (6) to prevent water flow from entering the inside of the bulb tubular turbine pump. When the incoming water pressure is high, the water flow enters the water - carrying ball (1) and squeezes and expands, pushing the flow guide plate (3) in the flow guide plate slot (2) outward along the flow guide plate slot (2). Several flow guide plates (3) are pushed outside the flow guide cone housing (4), thereby optimizing the incoming flow state and enabling the water flow to transition smoothly. When the incoming flow rate decreases, the internal water pressure of the water - carrying ball (1) decreases to its pressure resistance strength and below. The water pressure borne by the flow guide plate (3) is greater than the internal water pressure of the water - carrying ball (1). The flow guide plate (3) is pushed back into the flow guide plate slot (2) by the incoming flow, realizing the self - retraction and extension of the flow guide plate by using water pressure and achieving optimized operation.

7. The method according to claim 6, characterized in that: The flow guide plate (3) is a semi - lunar - shaped flow guide plate, and its streamline shape is used to adjust the inlet flow state and improve the overall efficiency of the water pump.

8. The method according to claim 6, wherein: The water - carrying ball (1) is a silica gel water - carrying ball, and the silica gel water - carrying ball can absorb a certain volume of pressurized water flow according to its water resistance and pressure resistance.

9. The method according to claim 6, characterized in that: There is also a pre - guide vane (5) and an impeller (7). The incoming flow passes through the flow guide plate (3) and is evenly distributed, then passes through the pre - guide vane (5) for further rectification and flows to the impeller (7) to improve the efficiency of the impeller (7).

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