Waterproof hammer water level flow control valve

Abstract

The utility model relates to a waterproof hammer water level control flow control valve, including valve body, valve seat, piston and valve cover, and valve body both ends are connected valve seat and valve cover respectively, and municipal water inlet pipeline is connected valve seat port, and the end face of vertical water flow channel is set up in valve seat, and valve seat end face movable contact connection piston top surface, and the wall surface perpendicular to piston top surface vicinity is provided with water inlet hole, and piston is connected valve body and valve cover respectively, and the water outlet of valve cover is connected with water inlet pipe, and water inlet pipe is connected water tank, and the utility model discloses utilize the pressure difference of water level and open and close water injection, and completely rely on hydraulic automatic control, safe and reliable, and the volume of water tank is fully utilized, and the piston sliding process is gentle in the process of not frequent opening and closing, and there is no water hammer pressure rise when closing valve, when the water hammer breaks out, and pipeline high pressure automatically promotes piston forward displacement pressure relief, and eliminates the pressure peak, and the impact to municipal pipe network is small.

Description

Technical Field

[0001] This utility model relates to the field of mechanical design technology, specifically a water level control valve for preventing water hammer. Background Technology

[0002] With the increasing number of high-rise buildings in my country, the scale of secondary pressurization and regulation water supply construction is gradually expanding. Secondary water supply now covers more than 60% of urban areas and accounts for more than half of the total urban water supply. Ensuring the safety of secondary water supply and effectively addressing the "last mile" of urban water supply is closely related to public health. As an important component of secondary water supply, "low-level water tank / pool + frequency conversion" regulation and pressurization water supply commonly uses float-type water level control valves when water from the municipal water network is introduced into the water tanks of secondary water supply pump stations.

[0003] Traditional float-type water level control valves have significant drawbacks in secondary water supply systems. In practical use, these valves are prone to the following problems: large municipal water inflows and frequent opening and closing of the float valve during pump pressurization can cause the float to detach and damage the valve; frequent opening and closing of the float valve can cause water hammer impacts on the municipal pipe network, threatening network safety; the limited stroke of the float results in low effective volume utilization of the water tank, with dead storage exceeding 30%, leading to a smaller actual usable volume and affecting water quality. Therefore, there is an urgent need for an innovative valve that can solve the problems of frequent operation, water hammer, and low volume utilization. Utility Model Content

[0004] The purpose of this utility model is to provide a water level control valve that prevents water hammer, a hydraulic self-control valve that is non-frequency-controlled, prevents water hammer, and allows for customizable water level ranges. It is used for water level control in secondary water supply systems. Through a piston-diaphragm linkage structure and a drain pipe control logic, it completely eliminates water hammer caused by frequent opening and closing, realizes a water level control valve that achieves non-frequency-controlled water level regulation, and achieves efficient utilization of water tank volume. It is suitable for precise water level control between municipal pipe networks and secondary water supply tanks.

[0005] To achieve the above objectives, this utility model provides the following technical solution: The water level control valve for preventing water hammer includes a valve body, valve seat, piston, and valve cover. The valve body is connected to the valve seat and valve cover at both ends. The municipal water supply pipeline connects to the valve seat port. The valve seat has a vertical water flow channel end face. The valve seat end face is movably connected to the top surface of the piston. A water inlet hole is opened on the vertical wall near the top surface of the piston. The piston passes through and connects to the valve body and valve cover. The outlet of the valve cover is connected to the water inlet pipe, which is connected to the water tank. The water tank is equipped with a float valve and a drain pipe. The float valve is located at the lowest water level in the water tank and is connected to the drain pipe. A diaphragm is also connected between the valve body and the piston. The piston and diaphragm divide the inside of the valve body into a sealed front chamber and a rear chamber. A vent pipe connecting the inside and outside is provided on the valve body where the rear chamber is located. The front chamber is connected to the float valve through the drain pipe. The upper end of the drain pipe extends to the highest water level in the water tank and is connected to the water inlet funnel.

[0006] In the aforementioned water level control valve for preventing water hammer, a diaphragm front pressure plate is connected between the piston and the diaphragm; and a diaphragm rear pressure plate is connected between the diaphragm and the valve body.

[0007] In the aforementioned water level control valve for preventing water hammer, a rear sealing ring is also connected at the connection between the valve body, valve seat, and piston.

[0008] In the aforementioned water level control valve for preventing water hammer, a front sealing ring is also connected between the valve body and the piston.

[0009] In the aforementioned water level control valve for preventing water hammer, the piston inlet is also fitted with a porous mesh sleeve for filtration.

[0010] In the above-mentioned water level control valve for preventing water hammer, the triggering error and opening / closing control accuracy of the float valve in response to water level changes is ±50mm.

[0011] The beneficial effects of this utility model are: (1) This utility model utilizes the pressure difference generated by the water level to open and close the water injection. Its hydraulic self-control mechanism achieves precise water level control of ±50mm, improving the water tank volume utilization rate by more than 30%, making full use of the water tank volume, and helping to realize peak-shaving regulation of the water tank. By storing water resources during the low water consumption period and supplying them during the peak water consumption period, it effectively balances the peak and valley differences in water demand, reduces the instantaneous pressure of the water supply system, avoids water pressure drop and water outages in some areas due to concentrated water consumption during the peak water consumption period, and ensures the stability and reliability of water supply.

[0012] (2) The opening and closing of this utility model is infrequent, only once at extreme water levels, completely eliminating frequent actions; the piston sliding process is smooth, and there is no water hammer pressure rise when the valve is closed; in the event of a sudden water hammer, the high pressure in the pipeline automatically pushes the piston forward to release pressure, eliminating the pressure peak drop of >90%. It has a small impact on the municipal pipe network, effectively solving the problem of pipeline pressure oscillation caused by the frequent opening and closing of traditional hydraulic water level control valves when controlling water levels, reducing the public safety risks caused by accidents such as pipeline rupture and water tank overflow, such as avoiding casualties and property losses caused by flooding of the work area.

[0013] (3) This utility model relies entirely on hydraulic self-control, making it safe and reliable. It requires no external power supply, avoiding potential safety hazards such as fires and electrical leaks caused by electrical faults, further improving the safety and stability of the entire water supply system. In places with extremely high electrical safety requirements, such as flammable and explosive chemical plants, this no-electricity characteristic provides strong protection for production safety. Attached Figure Description

[0014] Figure 1 This is a schematic diagram illustrating the structural principle of this utility model; Figure 2 for Figure 1 Enlarged structural diagram of point A in this utility model; In the picture: 1—Valve body; 2—Valve seat; 3—Rear sealing ring; 4—Piston; 5—Diaphragm; 6—Diaphragm front pressure plate; 7—Drain pipe; 8—Float valve; 9—Valve cover; 10—Front sealing ring; 11—Inlet pipe; 12—Perforated mesh sleeve; 13—Diaphragm rear pressure plate; 14—Vent pipe; 15—Inlet funnel; 16—Water tank. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this utility model.

[0016] refer to Figure 1 and Figure 2This utility model relates to a water level control valve for preventing water hammer, comprising a valve body 1, a valve seat 2, a piston 4, and a valve cover 9. The valve body 1 is connected to the valve seat 2 and the valve cover 9 at both ends, respectively. A municipal water supply pipeline connects to the port of the valve seat 2. The valve seat 2 has an end face with a vertical water flow channel. The end face of the valve seat 2 is movably connected to the top surface of the piston 4. A water inlet hole is provided on a vertical wall near the top surface of the piston 4. The piston 4 penetrates and connects the valve body 1 and the valve cover 9. The outlet of the valve cover 9 is connected to a water inlet pipe 11, which connects to a water tank 16. A float is provided inside the water tank 16. The ball valve 8 and the drain pipe 7 are provided. The float valve 8 is located at the lowest water level of the water tank 16 and is connected to the drain pipe 7. A diaphragm 5 is also connected between the valve body 1 and the piston 4. The piston 4 and the diaphragm 5 divide the interior of the valve body 1 into a sealed front chamber and a rear chamber. A vent pipe 14 connecting the inside and outside is provided on the valve body 1 where the rear chamber is located. The front chamber is connected to the float valve 8 through the drain pipe 7. The upper end of the drain pipe 7 extends to the highest water level of the water tank 16 and is connected to the inlet funnel 15. The inlet funnel 15 is strictly aligned with the highest water level line of the water tank 16 to ensure the accuracy of pressure transmission. Piston 4 and diaphragm 5 work together to form a water flow channel opening and closing assembly. The outer wall of piston 4 slides against the inner wall of valve seat 2 to open and close the water inlet channel. When piston 4 is pushed forward, its outer wall slides against the inner wall of valve seat 2 to open the water inlet channel. Water flows into water tank 16 through valve seat 2, piston 4 and water inlet pipe 11 in sequence. When piston 4 is pushed backward, its outer wall slides against the inner wall of valve seat 2 to close the water inlet channel. The upper end of drain pipe 7 extends to the highest water level in water tank 16 and is connected to water inlet funnel 15. The lower end of drain pipe 7 passes through valve body 1 and connects to the front cavity. Float valve 8 senses the water level change in water tank through drain pipe 7 and controls the pressure state of the front cavity.

[0017] To enhance sealing and facilitate connection, a diaphragm front pressure plate 6 is connected between the piston 4 and the diaphragm 5; a diaphragm rear pressure plate 13 is also connected between the diaphragm 5 and the valve body 1.

[0018] To enhance sealing, a rear sealing ring 3 is also connected at the connection between the valve body 1, valve seat 2, and piston 4. A front sealing ring 10 is also connected between the valve body 1 and piston 4.

[0019] To prevent clogging, in addition to checking the sealing of the diaphragm 5 and the sliding flexibility of the piston 4 in a timely manner, the inlet of the piston 4 is also fitted with a porous mesh sleeve 12 for filtration.

[0020] The effective force-bearing area of ​​piston 4 ensures that the thrust of the rear chamber water pressure on piston 4 is greater than the thrust of the front chamber water pressure on piston 4. The opening and closing stroke of float valve 8 is adjustable, achieving valve opening with a minimum water level accuracy of ±50mm and valve closing with a maximum water level accuracy of ±50mm. The drain pipe 7 and the inlet funnel 15 form a water column pressure transmission structure. When the water level in the tank rises to the highest level, water flows through the funnel 15 into the drain pipe 7 to pressurize the front chamber, forcing piston 4 to move backward and close the inlet channel.

[0021] When the float valve 8 is at the lowest water level, the drain pipe 7 is connected to the atmosphere, the front chamber is depressurized, and the water pressure in the pipeline pushes the piston 4 forward to open the water flow channel; when the float valve 8 is at the highest water level, the drain pipe 7 is closed and water is injected to increase the pressure, and the piston 4 moves backward to close the valve.

[0022] Piston 4 also has a water hammer relief function: when a sudden water hammer impact occurs, the pipeline pressure increases sharply and breaks the piston balance. Piston 4 automatically moves forward to open the discharge channel to release the high pressure. After the pressure is restored, it slowly resets.

[0023] The fully hydraulic automatic control system has no electrical components. The valve body 1 must be installed vertically, and the flared end of the drain pipe 7 should be aligned with the highest water level line of the water tank. The edge of the diaphragm 5 is pressed between the valve body 1 and the piston 4 to form a dynamic seal in the upper and rear chambers.

[0024] This utility model is used for water level control in secondary water supply systems. It is a flow control and position control valve that can eliminate water hammer effect and achieve frequency-free water level regulation. It is suitable for precise water level control between municipal pipe networks and secondary water supply tanks.

[0025] Working principle of this utility model: The connection between the end face of valve seat 2 and the top face of piston 4 is opened and closed by water pressure. When the municipal water pressure is greater than the water pressure in the front chamber, the connection between the end face of valve seat 2 and the top face of piston 4 separates, opening the water flow channel of valve seat 2. The municipal water passes through valve seat 2 and enters piston 4 through the water inlet hole, flowing into the water inlet pipe 11 from piston 4. When the municipal water pressure is less than the water pressure in the front chamber, the end face of valve seat 2 and the top face of piston 4 are pressed together to block the water flow channel of valve seat 2, thereby stopping the injection of water into water tank 16.

[0026] Municipal water flows in through valve inlet 11. When the water level in the tank drops to the set minimum level, the float valve 8 falls, allowing the front chamber to connect to the atmosphere via the drain pipe 7, causing a sudden drop in pressure in the front chamber. The municipal water supply exerts pressure on the top surface of piston 4, and the water pressure in the pipeline pushes piston 4 and diaphragm 5 forward, allowing water to flow through valve seat 2 into the water tank. When the water level rises between the minimum and maximum levels, as the water level in the tank increases, the float will first rise and close, the drain pipe 7 will close, and the front chamber will maintain pressure balance, allowing the system to continuously replenish water. When the water level rises to the maximum level, exceeding the inlet funnel 15, due to the presence of a certain height of water column, water from the tank flows through the inlet funnel 15 into the drain pipe 7 and into the front chamber. The front chamber will exert a downward pressure on the piston, and the increased water pressure will cause piston 4 and diaphragm 5 to move backward, closing the inlet channel and stopping water from entering the tank. This invention is only opened and closed at extreme water levels, and the piston 4 slides smoothly to avoid sudden pressure changes; when a sudden water hammer occurs in the pipeline, the hydraulic impact automatically pushes the piston 4 forward to release pressure and eliminate the pressure peak.

[0027] When the secondary water supply pump is running, the water level in the water tank 16 begins to drop. Because there is always a certain height of water column in the drain pipe 7, this utility model remains closed until the water level in the water tank 16 is lower than the lowest water level where the float valve 8 is located. The float falls and opens the float valve 8, the front chamber begins to depressurize, and the water in the drain pipe 7 and part of the front chamber flows out. At this time, the pressure of the municipal water supply causes the piston to move forward, and water begins to enter the water tank again.

[0028] It is known that the opening and closing of this utility model relies on the hydraulic difference between the valve seat 2 end face and the piston 4 top face within the valve body 1, eliminating the need for manual adjustment. This utility model only opens when the water level in the water tank 16 is below the minimum water level and only closes when the water level in the pool is above the maximum water level, thus eliminating wear on the internal structure caused by frequent valve opening and closing and extending the valve's lifespan. When this utility model opens and closes, the piston 4 slides smoothly, preventing water hammer pressure rise due to violent movements that could endanger the safe operation of the pipeline network. When water hammer occurs in the pipeline, the piston 4 and diaphragm 5 move forward rapidly, and this utility model opens to discharge water into the pool to release the water hammer pressure, thereby eliminating water hammer and protecting the safe operation of the pipeline network.

[0029] This invention utilizes municipal water pressure to drive the piston 4, with the entire process relying on hydraulic differential and requiring no electrical components. In the event of a sudden water hammer, the high pressure in the pipeline breaks the balance of piston 4, automatically moving forward to open the discharge channel. After releasing the pressure, the piston slowly returns to its original position.

[0030] This invention achieves precise water level control of ±50mm through a hydraulic self-control mechanism, increasing the water tank's volume utilization rate by over 30%. A single water replenishment cycle involves only one opening and closing, completely eliminating frequent operations and reducing water hammer pressure peaks by over 90%. Its design, free of electrical components, makes it suitable for flammable and explosive environments, ensuring high inherent safety. The piston-diaphragm linkage structure reduces wear by 80%, and accelerated testing has verified a service life exceeding 10 years, significantly reducing maintenance costs. This invention is suitable for secondary water supply pump room tanks, fire-fighting water tanks, industrial water storage facilities, and explosion-proof locations.

[0031] This utility model features a water level sensor with precise accuracy settings that accurately detects changes in water level. In actual use, the average error in water level sensing is within ±50mm under varying water quality and temperature conditions. This ensures precise opening and closing only within the set water level range, effectively avoiding frequent operation.

[0032] Water hammer elimination effect: There is virtually no water hammer pressure rise during the valve closing process, which can reduce the peak water hammer pressure to a safe range, far exceeding the technical requirements. This effectively ensures the safe and stable operation of the pipeline system and saves users a lot of potential pipeline maintenance costs.

[0033] Through accelerated life testing and actual operation monitoring, no structural damage was found, and the sealing performance was good. Based on the current wear rate, the service life will far exceed the design specifications, greatly reducing the user's replacement costs and maintenance frequency.

[0034] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A water hammer arrestor water level flow control valve, comprising: The valve includes a valve body (1), a valve seat (2), a piston (4), and a valve cover (9). The valve body (1) is connected to the valve seat (2) and the valve cover (9) at both ends. A municipal water supply pipeline is connected to the port of the valve seat (2). The valve seat (2) has a vertical water flow channel at its end face. The end face of the valve seat (2) is movably connected to the top surface of the piston (4). A water inlet hole is opened on the vertical wall near the top surface of the piston (4). The piston (4) is connected to the valve body (1) and the valve cover (9) respectively. The outlet of the valve cover (9) is connected to a water inlet pipe (11), and the water inlet pipe (11) is connected to a water tank (16). A float valve (8) and a drain pipe (7) are installed inside the water tank (16). The float valve (8) is located at the lowest water level in the water tank (16) and is connected to the drain pipe (7). A diaphragm (5) is also connected between the valve body (1) and the piston (4). The piston (4) and the diaphragm (5) divide the inside of the valve body (1) into a sealed front cavity and a rear cavity. A vent pipe (14) connecting the inside and outside is installed on the valve body (1) where the rear cavity is located. The front cavity is connected to the float valve (8) through the drain pipe (7). The upper end of the drain pipe (7) extends to the highest water level in the water tank (16) and is connected to the inlet funnel (15).

2. The water hammer arrestor water level flow control valve according to claim 1, wherein, A diaphragm front pressure plate (6) is also connected between the piston (4) and the diaphragm (5); a diaphragm rear pressure plate (13) is also connected between the diaphragm (5) and the valve body (1).

3. The water hammer arrestor water level flow control valve according to claim 1, wherein, A rear sealing ring (3) is also connected at the connection between the valve body (1), valve seat (2) and piston (4).

4. The water hammer arrestor water level flow control valve according to claim 1, wherein, A front sealing ring (10) is also connected between the valve body (1) and the piston (4).

5. The water level control valve for preventing water hammer according to claim 1, characterized in that: The piston (4) inlet is also fitted with a porous mesh sleeve (12) for filtration.

6. The water level control valve for preventing water hammer according to claim 1, characterized in that, The trigger error control accuracy of the float valve (8) in response to water level changes is ±50mm.

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