Water inlet ball valve of pumped storage power station

Abstract

The utility model provides a water inlet ball valve of a pumped storage power station, which relates to the technical field of water inlet ball valves and comprises a ball valve body, the right side of the ball valve body is communicated with a pressure compensation joint, the right side of the pressure compensation joint is communicated with a downstream connecting pipe, and the left side of the ball valve body is communicated with an upstream connecting pipe. A desilting tank, a four-way valve, a filter and a cut-off valve are arranged on the front side of the upstream connecting pipe, the desilting tank is communicated with the upstream connecting pipe and the downstream connecting pipe through a water taking pipe, the desilting tank is communicated with the water inlet end of the filter, and the liquid outlet end of the filter is communicated with the left side of the cut-off valve; the right side of the block valve communicates with the water inlet end of the four-way valve, a valve body is arranged in the ball valve body, and valve water sealing rings are arranged on the two sides of the valve body. According to the water inlet ball valve of the pumped storage power station, the situation that the service life of the water inlet ball valve is shortened under high-frequency opening and closing can be avoided.

Description

Technical Field

[0001] This utility model relates to the field of water inlet ball valve technology, and in particular to a water inlet ball valve for a pumped storage power station. Background Technology

[0002] With the continuous growth of energy demand and the increasing emphasis on clean energy, pumped storage hydroelectric power stations are playing an increasingly crucial role in the power system. They can pump water from the lower reservoir to the upper reservoir to store energy during off-peak hours, and release the water to generate electricity during peak hours, effectively regulating the balance of power supply and demand and improving the stability and reliability of the power grid.

[0003] In the operation of pumped storage power stations, the inlet ball valve plays a crucial role. Unlike other types of hydropower stations, pumped storage power stations operate under unique conditions, requiring their inlet ball valves to be opened and closed frequently. This frequent operation places stringent requirements on the inlet ball valves, particularly in terms of their switching performance and service life, which must be significantly superior to those of ordinary valves. However, current inlet ball valves still face many challenges in terms of durability.

[0004] In traditional inlet ball valve designs, the sealing structure is prone to wear and aging during frequent opening and closing, leading to decreased sealing performance and potential leakage, which can affect the normal operation of the entire pumped storage system. Furthermore, frequent opening and closing operations subject internal valve components to significant impact and friction, accelerating component damage and reducing the valve's overall lifespan. In addition, impurities such as silt may be present in the water flow, entering the valve and causing erosion and wear on the sealing surfaces and valve body, further exacerbating the risk of valve damage.

[0005] Therefore, it is necessary to provide a new inlet ball valve for pumped storage power stations to solve the above-mentioned technical problems. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides an inlet ball valve for a pumped storage power station.

[0007] This utility model provides an inlet ball valve for a pumped storage power station, comprising: a ball valve body; a pressure compensation connector connected to the right side of the ball valve body; a downstream connecting pipe connected to the right side of the pressure compensation connector; an upstream connecting pipe connected to the left side of the ball valve body; a sedimentation tank, a four-way valve, a filter, and a shut-off valve disposed on the front side of the upstream connecting pipe; the sedimentation tank being connected to the upstream and downstream connecting pipes via a water intake pipe; the sedimentation tank being connected to the inlet end of the filter; the outlet end of the filter being connected to the left side of the shut-off valve; the right side of the shut-off valve being connected to the inlet end of the four-way valve; a valve body disposed within the ball valve body; valve sealing rings disposed on both sides of the valve body; an annular groove disposed on the inner wall of the ball valve body; a sealing ring disposed in each of the two annular grooves; the sealing rings dividing the annular grooves into a first sealing cavity and a second sealing cavity; the four-way valve being connected to the two first sealing cavities via two first connecting pipes; and the four-way valve being connected to the two second sealing cavities via two second connecting pipes.

[0008] Preferably, a valve switch is provided on the front side of the ball valve body, a rocker arm is fixedly connected to the valve switch, and a hydraulic cylinder is provided on the front side of the ball valve body, with the telescopic end of the hydraulic cylinder rotatably connected to the rocker arm.

[0009] Preferably, both the downstream connecting pipe and the upstream connecting pipe are equipped with an exhaust valve.

[0010] Preferably, the downstream connecting pipe and the upstream connecting pipe are connected by a bypass pipe.

[0011] Preferably, a drain valve is installed at the lower end of the settling tank.

[0012] Preferably, both water intake pipes are equipped with pressure gauges.

[0013] Preferably, the sealing ring is slidably connected to the inner wall of the annular groove and the inner wall of the ball valve body. The sealing ring has a T-shaped cross-section and is a forging made of 06Cr13Ni4Mo with a hardness of 221-285HB. The inner wall of the annular groove is overlaid with wear-resistant stainless steel. The valve sealing ring is made of wear-resistant stainless steel forging 04Cr13Ni5Mo with a hardness of 280-310HB.

[0014] Compared with related technologies, the water inlet ball valve for pumped storage power stations provided by this utility model has the following beneficial effects:

[0015] 1. This utility model provides an inlet ball valve for a pumped storage power station. An auxiliary system consisting of a sedimentation tank, a four-way valve, a filter, and a shut-off valve is installed on the left side of the ball valve body. The sedimentation tank effectively collects sediment from the water flow, reducing wear on internal valve components and extending valve life. The filter finely filters the liquid entering the sealing cavity, preventing impurities from damaging the sealing ring and ensuring a good sealing effect. This reduces the risk of leakage and greatly improves the reliability and stability of the entire ball valve in complex water flow environments.

[0016] 2. This utility model provides an inlet ball valve for a pumped storage power station. Its unique double-valve body design, along with the matching valve sealing ring and sealing ring structure, divides the annular groove into a first sealing chamber and a second sealing chamber. A four-way valve is connected to the two sealing chambers via a connecting pipe to achieve pressure compensation. This structure not only enhances the multiple layers of sealing protection and better adapts to pressure changes during frequent opening and closing operations, effectively buffering the impact of water flow on the sealing components, but also effectively prevents serious leakage problems caused by the failure of a single seal, improving the overall durability and sealing longevity of the valve.

[0017] 3. This utility model provides an inlet ball valve for a pumped storage power station. A linkage device between a valve switch, a rocker arm, and a hydraulic cylinder is equipped on the front side of the valve body, making the opening and closing of the valve body more precise, convenient, and efficient. The hydraulic cylinder provides stable and powerful power output, and through the ingenious transmission of the rocker arm, the opening degree of the valve body can be precisely controlled, reducing jamming and wear during operation, further improving valve opening and closing performance, adapting to the needs of frequent operating condition switching in pumped storage power stations, and simultaneously reducing maintenance costs and failure risks. Attached Figure Description

[0018] Figure 1 A schematic diagram of a preferred embodiment of a pumped storage power station inlet ball valve provided by this utility model;

[0019] Figure 2 for Figure 1 A structural schematic diagram from another perspective is shown;

[0020] Figure 3 for Figure 1 Internal structure diagram;

[0021] Figure 4 for Figure 3 A magnified structural diagram of point A in the middle.

[0022] The following are the labels in the diagram: 1. Ball valve body; 2. Downstream connecting pipe; 3. Upstream connecting pipe; 4. Sedimentation tank; 5. Hydraulic cylinder; 6. Rocker arm; 7. Valve switch; 8. Pressure compensation connector; 9. Water intake pipe; 10. Air vent valve; 11. Filter; 12. Four-way valve; 13. Shut-off valve; 14. Bypass pipe; 15. Drain valve; 16. First connecting pipe; 17. Second connecting pipe; 18. First sealing cavity; 19. Second sealing cavity; 20. Sealing ring; 21. Valve body; 22. Valve sealing ring. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Please refer to the following: Figures 1 to 4 A ball valve for the inlet of a pumped storage power station includes: a ball valve body 1; a pressure compensation connector 8 connected to the right side of the ball valve body 1; a downstream connecting pipe 2 connected to the right side of the pressure compensation connector 8; an upstream connecting pipe 3 connected to the left side of the ball valve body 1; both the downstream connecting pipe 2 and the upstream connecting pipe 3 are equipped with air vent valves 10; the downstream connecting pipe 2 and the upstream connecting pipe 3 are connected through a bypass pipe 14; a sedimentation tank 4, a four-way valve 12, a filter 11, and a shut-off valve 13 are provided at the front of the upstream connecting pipe 3; a drain valve 15 is installed and connected at the lower end of the sedimentation tank 4; the sedimentation tank 4 is connected to the upstream connecting pipe 3 and the downstream connecting pipe 2 through water intake pipes 9; pressure gauges are provided on both water intake pipes 9; the sedimentation tank 4 is connected to the inlet end of the filter 11; and the outlet end of the filter 11 is connected to the shut-off valve 13. The left side of the shut-off valve 13 is connected, and the right side of the shut-off valve 13 is connected to the inlet end of the four-way valve 12. The ball valve body 1 is provided with a valve body 21. Both sides of the valve body 21 are provided with valve sealing rings 22. The inner wall of the ball valve body 1 is provided with two annular grooves. Each of the two annular grooves is provided with a sealing ring 20. The sealing ring 20 divides the annular groove into a first sealing cavity 18 and a second sealing cavity 19. The four-way valve 12 is connected to the two first sealing cavities 18 through two first connecting pipes 16. The four-way valve 12 is connected to the two second sealing cavities 19 through two second connecting pipes 17. The sealing ring 20 is in a sealing sliding connection with the inner wall of the annular groove and the inner wall of the ball valve body 1. The cross-section of the sealing ring 20 is T-shaped. The sealing ring 20 is made of hard alloy. The inner wall of the annular groove is welded with stainless steel.

[0025] It should be noted that: a bypass valve is installed on the bypass pipeline 14. When the ball valve body 1 is opened, it reduces the water pressure between the downstream connecting pipe 2 and the upstream connecting pipe 3, preventing water hammer caused by opening and closing the ball valve under high pressure. Simultaneously, the valve body 21 is opened and closed using an external hydraulic cylinder 5, and the movement of the sealing ring 20 is achieved by water pressure, ensuring segmented valve closure and preventing the mixing of operating oil and water. The two vent valves 10 allow for timely discharge of gas from the downstream connecting pipe 2 and the upstream connecting pipe 3 when the ball valve is opened and closed. Additionally, a drain valve 15 is installed at the lower end of the sedimentation tank 4, allowing for drainage of the sedimentation tank 4 after prolonged operation. The sealing ring 20 is a forging made of 06Cr13Ni4Mo with a hardness of [missing information]. The inner wall of the annular groove is welded with wear-resistant stainless steel, and the valve sealing ring 22 is made of wear-resistant stainless steel forging 04Cr13Ni5Mo with a hardness of 280-310HB, ensuring that the moving surface is wear-resistant and corrosion-resistant. The hardness difference between the valve sealing ring 22 and the sealing ring 20 is not less than 35HB, ensuring that no indentation marks will be generated on the sealing surface after long-term opening and closing. The hydraulic cylinder 5 is a high-pressure hydraulic cylinder to ensure reliable opening and closing of the water inlet ball valve, segmented closing, fast closing and slow closing, and to ensure a smooth valve closing process. The four-way valve 12 can not only press the water into the first sealing chamber 18 or the second sealing chamber 19, but also press the water in the first sealing chamber 18 or the second sealing chamber 19 back into the sedimentation tank 4.

[0026] Among them, a valve switch 7 is provided on the front side of the ball valve body 1, and a rocker arm 6 is fixedly connected to the valve switch 7. A hydraulic cylinder 5 is provided on the front side of the ball valve body 1, and the telescopic end of the hydraulic cylinder 5 is rotatably connected to the rocker arm 6.

[0027] It should be noted that the connection between the valve switch 7 and the valve body 21 is the existing structure within the ball valve.

[0028] The working principle of the inlet ball valve of the pumped storage power station provided by this utility model is as follows: When the valve is opened, the four-way valve 12 is controlled to operate, so that the water in the sedimentation tank 4 enters the two second sealing chambers 19 through the two second connecting pipes 17, thereby causing the two sealing rings 20 to move away from the corresponding valve sealing rings 22, thus opening the initial seal. Then, the operator controls the hydraulic cylinder 5 to drive the rocker arm 6 to rotate the valve switch 7, so that the valve body 21 and the valve sealing ring 22 rotate, thereby opening the ball valve body 1.

[0029] When the valve is closed, the hydraulic cylinder 5 drives the rocker arm 6 to rotate in the opposite direction, which causes the valve switch 7 to drive the valve body 21 and the valve sealing ring 22 to rotate in the opposite direction, so that the ball valve body 1 is closed. The four-way valve 12 is controlled to operate again, so that water is injected into the two first sealing chambers 18 through the two first connecting pipes 16, causing the two sealing rings 20 to move towards the valve sealing ring 22, thus closing the entire valve.

[0030] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A pumped storage power plant intake ball valve characterized by, The utility model relates to a ball valve, which comprises a ball valve body (1), a pressure compensation joint (8) communicated with the right side of the ball valve body (1), a downstream connecting pipe (2) communicated with the right side of the pressure compensation joint (8), an upstream connecting pipe (3) communicated with the left side of the ball valve body (1), a sand tank (4), a four-way valve (12), a filter (11) and a cut-off valve (13) arranged on the front side of the upstream connecting pipe (3), the sand tank (4) being communicated with the upstream connecting pipe (3) and the downstream connecting pipe (2) through water taking pipes (9), the sand tank (4) being communicated with the water inlet end of the filter (11), the liquid outlet end of the filter (11) being communicated with the left side of the cut-off valve (13), the water inlet end of the four-way valve (12) being communicated with the right side of the cut-off valve (13), a valve body (21) being arranged in the ball valve body (1), valve seal rings (22) being arranged on both sides of the valve body (21), annular grooves being arranged on the inner walls of the ball valve body (1), sealing rings (20) being arranged in the two annular grooves, the sealing rings (20) dividing the annular grooves into first sealing cavities (18) and second sealing cavities (19), the four-way valve (12) being communicated with the two first sealing cavities (18) through two first connecting pipes (16), and the four-way valve (12) being communicated with the two second sealing cavities (19) through two second connecting pipes (17). A valve switch (7) is arranged on the front side of the ball valve body (1), a rocker arm (6) is fixedly connected to the valve switch (7), a hydraulic cylinder (5) is arranged on the front side of the ball valve body (1), and the telescopic end of the hydraulic cylinder (5) is rotationally connected to the rocker arm (6).

2. A ball valve for a pumped storage power plant according to claim 1, characterized in that An exhaust valve (10) is arranged on each of the downstream connecting pipe (2) and the upstream connecting pipe (3).

3. A ball valve for a pumped storage power plant according to claim 1, characterized in that The downstream connecting pipe (2) and the upstream connecting pipe (3) are communicated through a bypass pipeline (14).

4. A ball valve for pumped storage power plants according to claim 1, characterized in that, A blowdown valve (15) is arranged at the lower end of the sand tank (4).

5. A ball valve for pumped storage power plants according to claim 1, characterized in that, Pressure gauges are arranged on the two water taking pipes (9).

6. A ball valve for pumped storage power plants according to claim 1, characterized in that, The sealing ring (20) is sealingly and slidably connected to the inner wall of the annular groove and the inner wall of the ball valve body (1), the cross section of the sealing ring (20) is T-shaped, the sealing ring (20) is a forged piece, the material of the sealing ring (20) is 06Cr13Ni4Mo, the hardness of the sealing ring (20) is 221-285 HB, the inner wall of the annular groove is stacked with wear-resistant stainless steel, and the valve seal ring (22) is a wear-resistant stainless steel forged piece 04Cr13Ni5Mo with a hardness of 280-310 HB.

7. A ball valve for a pumped storage power plant according to claim 3, characterized in that ​

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