Multifunctional control valve for water pump

Abstract

This invention relates to the field of valve technology, specifically to a multifunctional control valve for water pumps, comprising a valve body, an upper pump cover, a main shaft, a valve seat, a valve mechanism, a moving mechanism, and a buffer mechanism. The valve body is disposed in a pipeline transporting liquid. A sealing element is fixedly installed inside the valve body. The main shaft element passes through the sealing element and is fixedly installed inside the valve body. The valve seat is fixedly installed inside the valve body. The moving mechanism passes through the main shaft element and is installed on the valve mechanism. When the water pump is turned on, the moving mechanism can rotate and rise along the main shaft element with the help of water flow. Thus, the moving mechanism can cooperate with the buffer mechanism to slow down the descent speed and reduce water hammer. The buffer mechanism passes through the main shaft element and is fixedly installed at the lower end of the sealing element. By setting up the moving mechanism and the buffer mechanism, the present invention effectively reduces water hammer by slowing down the descent speed of the valve mechanism.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and more specifically to a multifunctional control valve for water pumps. Background Technology

[0002] The control valve consists of a main valve and a piping system. The new multi-functional control valve combines the functions of a gate valve, check valve, and water hammer eliminator. It is a valve body used in water supply systems of high-rise buildings, typically installed on the pump outlet pipeline to prevent and reduce water hammer impact during pump start-up and shutdown, prevent backflow, and thus protect the pump and maintain pipeline safety. To automate pump operation, simplify management, reduce labor, and improve reliability, hydraulic and electric valves have replaced manual valves. Multiple technical improvements have been made to individual valves, resulting in a new type of valve: the multi-functional control valve.

[0003] In existing multi-functional control valves for water pumps used in high-rise building water supply systems, the flow rate and pressure suddenly decrease when the pump stops. The main valve plate begins to slide downwards under gravity, and the sudden impact force of the water in the pipeline causes noise and vibration in the pipes or containers carrying the flow—a phenomenon known as water hammer. Water hammer occurs when the working fluid does not flow smoothly in the pipeline, resulting in loud noises and strong vibrations, and can even cause serious damage to equipment.

[0004] To address this, existing technologies have provided some solutions. For example, Chinese invention patent (application number: CN201710901946.9, publication date: 2018-08-31) discloses a multi-functional water pump control valve for pond sewage. This device includes a sludge filter tank, with an inlet pipe fixedly connected to one side of the top of the sludge filter tank. A solid filter head is threaded onto one end of the inlet pipe. A conical filter tank is fixedly installed at the bottom of the sludge filter tank, with a silt trough fixedly connected to the bottom of the conical filter tank. A silt pipe is fixedly connected to one side of the silt trough, and the silt trough and silt pipe are internally connected. A rotating suction pipe is fixedly inserted into the top of the sludge filter tank, with a silt filter head threaded onto the bottom end of the rotating suction pipe. A rotating shaft is fixedly installed at the top of the rotating suction pipe. This device changes the traditional control valve that does not have a sewage filtration device. When used in a pond environment, due to the large amount of sludge in the pond, the valve is easily blocked by sludge, causing damage to the equipment. Furthermore, when there is a large amount of sludge, it will affect the pumping efficiency. During use, water hammer can occur when the valve is switched on or off due to sudden changes in water flow, which can damage the device and reduce its service life.

[0005] In view of the above, in order to overcome the above technical problems, the present invention designs a multifunctional control valve for water pumps, which solves the above technical problems. Summary of the Invention

[0006] The technical problem to be solved by this invention is that water hammer caused by rapidly closing the valve may cause certain damage to the control valve of the multi-functional water pump, affecting the use of the water supply system, or even damaging the device in the water supply system.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] This invention provides a multifunctional control valve for a water pump, comprising a valve body, an upper pump cover, a main shaft, a valve seat, a valve mechanism, a movable mechanism, and a buffer mechanism. The valve body is disposed in a pipeline transporting liquid, and both ends of the valve body are fixedly connected to the water pump outlet pipeline, with the valve body and pipeline connected by flanges. The upper pump cover is fixedly installed inside the valve body and is used to seal the valve body. The main shaft passes through the upper pump cover and is fixedly installed inside the valve body, and is used to install the buffer mechanism and the movable mechanism. The valve seat is fixedly installed inside the valve body and is used to support the movable mechanism. The valve mechanism is fixedly installed on the valve seat, and the valve mechanism... The mechanism is controlled by the movable mechanism, which drives the valve mechanism to rise, thereby quickly opening the control valve. The movable mechanism is installed on the valve mechanism through the main shaft. When the water pump is turned on, the movable mechanism rotates and rises along the main shaft with the help of water flow. Thus, the movable mechanism and the buffer mechanism cooperate to slow down the descent speed and reduce the water hammer effect when the water pump is turned off. The buffer mechanism is fixedly installed at the lower end of the upper pump cover through the main shaft. The buffer mechanism is used to cooperate with the movable mechanism to fix it when the water pump is turned on, restricting the position of the movable mechanism. When the water pump is turned off, the buffer mechanism slows down the descent speed of the movable mechanism, thereby reducing the water hammer effect.

[0009] In the operation of a control valve, the valve itself is the most crucial component. The quality of the valve determines whether the control valve can completely block the water flow during operation, thus preventing water overflow from the pipeline. The valve mechanism includes a sealing plate, a pressure plate, a main valve, spiral blades, and a bushing. The main valve mates with the valve seat, and the pressure plate and the main valve are bolted together. The sealing plate is fixedly installed on the upper end of the main valve using laser welding or flame welding. The sealing plate prevents leakage and foreign object intrusion. The bushing reduces friction generated during rotation between the valve mechanism and the main shaft. The bushing is made of fluororubber, which has excellent corrosion resistance and wear resistance, allowing it to be used in extreme temperature and chemical environments. Its excellent friction resistance makes it suitable for high-speed and high-temperature friction, thus avoiding direct contact between the valve mechanism and the main shaft.

[0010] Valve operation is typically controlled manually or electronically. This invention offers a novel approach: leveraging the high pressure from a pump's activation to lift the movable mechanism, eliminating the need for traditional switching systems and avoiding unnecessary components. The movable mechanism comprises a control plate, a claw-shaped element, a return spring, a fixing block, and a fixing bolt. The claw-shaped element is made of 321 stainless steel, which possesses excellent corrosion resistance, high strength, and good ductility. The return spring can be made of spring steel, allowing for repeated use and operating in less demanding environments, including humid conditions, without rusting. The fixing block is made of 316 stainless steel and is installed using gas shielded welding and argon arc welding. The fixing bolt is mounted on the control plate using brazing, allowing the claw-shaped element to move around it. When the movable mechanism rotates, the claw-shaped element experiences centrifugal force, overcoming the elastic force of the return spring and displacing outwards. The claw-shaped element engages with the keycap, locking itself and achieving relative locking between the movable mechanism and the buffer mechanism.

[0011] Furthermore, the main valve has a through hole in the middle for installation with the main shaft. A ring array of through holes surrounds the main valve's through hole, and this ring array is equipped with hexagonal reinforcing rods. This ring array configuration allows for comprehensive machining of the main valve from all sides, enhancing its durability and ensuring strength. The hexagonal reinforcing rods reinforce the main valve's body structure, ensuring long-term use under high-pressure environments, guaranteeing strength and service life. The main valve also features an annular protrusion and an annular groove on its lower end face for mounting the spiral blades. When water flows through the annular groove... The different water flow rates on both sides of the spiral blades cause the spiral blades to rotate, driving the main valve upward and generating centrifugal force, which allows the movable mechanism to lock tightly with the buffer mechanism. The main valve is made of silicon bronze. The annular hexagonal reinforcing rod on the main valve effectively strengthens its structural strength. The main valve has through holes arranged in an outer annular array. When the water pump is turned off, the main valve falls and is fixed on the valve seat, and water can flow through the through holes. The area of ​​all through holes is 10% of the cross-sectional area of ​​the main valve. That is, when the main valve is closed, the flow rate is immediately reduced by 90% before being completely closed, which can effectively reduce water hammer.

[0012] For the spiral blades, a fixed-distance design was chosen. Fixed-distance blades have a simpler structure, are lighter, have lower manufacturing costs, and are easier to maintain, making them suitable for low-power applications. The spiral blades are designed in a willow-blade shape. According to Bernoulli's principle, in fluid mechanics, the flow velocity is lower on the side with higher pressure and higher on the side with lower pressure. The willow-blade shape allows for the rapid generation of upward motion by utilizing the difference in water pressure on both sides, especially in the high-pressure, high-velocity environment inside the control valve. The willow-blade shape maximizes the utilization of the water's potential energy, converting it into the kinetic energy of the main valve to drive its upward movement.

[0013] Analysis of the number of helical blades: Ten blades are required to provide sufficient power for the main valve to overcome gravity and rise. The blade solidity is 0.4, a crucial parameter for measuring power output. A solidity of 0.4 effectively ensures the control valve receives greater power in the environment. The blade diameter is 8-12cm. A large diameter depends on the size of the main valve; a larger diameter maximizes lift and theoretically achieves maximum power. The helical blade pitch is 10-15cm. This pitch ensures sufficient water flow from both sides, guaranteeing stable power output. Therefore, it should be at least 0.9 times the diameter and at most 1.5 times the diameter. Within this range, a greater power output can be achieved. To ensure the stability of the output power, the spiral blades are made of glass fiber reinforced polymer. Glass fiber reinforced polymer is lightweight and has good physical strength, which reduces its own weight, allowing for greater power output to the main valve. Furthermore, it is not easily deformed under high-intensity water flow, ensuring stable rotation. The spiral blades have a streamlined curved surface design. When the water pump is working, the water flow below the main valve increases, and water flows over both sides of the spiral blades. Because the spiral blades have a streamlined curved surface design and are equipped with water flow grooves, the limited space of the annular groove allows for further acceleration of the water flow speed on both sides of the spiral blades, thus ensuring its power. The different shapes on both sides result in different water flow rates, generating thrust that pushes the main valve upward. The movable mechanism is installed on the main valve, and the main valve drives the movable mechanism to rise.

[0014] Regarding the structural arrangement for the connection and separation between the main shaft and the control plate, the lower part of the main shaft has a spiral groove that can engage with the spiral protrusion of the control plate. When the control plate falls and contacts the groove, its gravity is decomposed into two forces: downward movement and movement along the groove. In this situation, the control plate rotates counterclockwise along the groove's texture, thereby disengaging the movable mechanism from the buffer mechanism. The buffer mechanism then resets under the elastic force of the return spring. Simultaneously, due to the spiral groove design, the gravity of the control plate is decomposed, slowing its descent speed and further decelerating it, thus achieving a slow-closing effect for the movable mechanism. The groove is coated with a ceramic coating material, specifically silicon nitride and aluminum oxide. This coating improves the hardness, wear resistance, and corrosion resistance of the groove. Furthermore, it avoids replacing the entire control plate material; coating is only applied to easily worn areas, saving manufacturing costs and reducing material waste.

[0015] During the closing process of the control valve, a buffer is needed to prevent rapid closure and water hammer. The buffer mechanism includes a buffer spring, a connecting block, and a keycap. The buffer spring is fixedly installed at the lower end of the upper pump cover using a combination of integrated brazing and argon arc welding. The connecting block is also fixedly installed at the lower end of the buffer spring, using a combination of integrated brazing and argon arc welding. To ensure the secure fixing of the buffer spring, connecting block, and upper pump cover, the welding must be strong. Integrated brazing is a good welding method in existing technology, but it is costly and requires separate molds and fixtures. If production capacity is low in actual production, argon arc welding can be used. Welding is used instead, which can basically meet the usage requirements; the keycap is fixedly installed on the lower end face of the connecting block, and the installation method is set to adhesive bonding and brazing; 3-4 buffer springs are set, and the buffer springs are arranged in a circumferential array. The 3-4 buffer springs further enhance stability and increase its multi-dimensional buffering capacity, which is conducive to the smooth descent of the buffer mechanism; the buffer springs will extend under the gravity of the movable mechanism, and the extension distance is greater than the distance between the threaded groove of the main shaft and the connecting block. In this way, the downward displacement driven by the movable mechanism meets the usage conditions, thereby completing the cooperation between the main shaft and the movable mechanism.

[0016] Regarding the locking process of the movable mechanism and the buffer mechanism, the keycap has an inwardly facing groove for locking the claw-shaped element. Inside the groove is an arc-shaped protrusion for limiting the position of the claw-shaped element, which can cooperate with the arc-shaped groove on the claw-shaped element for further locking. This reduces friction while ensuring a tight fit between the claw-shaped element and the keycap, guaranteeing performance. The keycap is made of silicon carbide, a high-strength, corrosion-resistant material. When the keycap and the claw-shaped element lock together, collisions, compression, and friction are inevitable. Using a high-strength material facilitates normal operation and ensures a long service life. The claw-shaped element overcomes the elastic force of the return spring and displaces outward, locking itself to the keycap, thus fixing the movable mechanism relative to the buffer. At this point, the movable mechanism and the buffer mechanism are a single unit; when the movable mechanism descends, it will cause the buffer mechanism to descend as well.

[0017] In the humid operating environment of water pump control valves, the surface of the buffer spring needs to undergo heat treatment and sandblasting. Heat treatment can make the material structure denser and the grains finer, thereby improving the material's strength and hardness. The buffer spring operates in a harsh environment, constantly exposed to humidity, and the high-pressure water flow inside the control valve will impact its structure. If it is not sandblasted, the outer surface of the buffer spring is easily broken under the action of high-pressure water flow, and may even flow into the water flow, causing damage to the water supply system.

[0018] The beneficial effects of this invention are as follows:

[0019] 1. This invention, by installing a movable mechanism and a buffer mechanism, divides the closing process of the control valve into two parts: first, most of the valve is closed, causing the water flow to stop significantly, thus achieving a rapid valve closure effect; then, with the delayed closing effect of the buffer mechanism, the movable mechanism descends as slowly as possible. The control plate, in cooperation with the buffer mechanism, closes slowly, effectively reducing water hammer and ensuring the safety and stability of the equipment.

[0020] 2. This invention utilizes the thrust generated by the difference in flow rate on both sides of the spiral blades to drive the main valve to rotate and rise, thereby enabling the moving mechanism to obtain centrifugal force. The claw-shaped element and keycap are locked and jammed, enhancing the stability of the control valve during operation. When the control valve is closed, the moving mechanism and the buffer mechanism are fixed, and the buffer mechanism delays the falling time of the locking mechanism, making the falling time of the moving mechanism and the main valve different, thereby reducing the water hammer phenomenon. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a cross-sectional view of the overall structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the valve mechanism of the present invention;

[0025] Figure 4 This is a schematic diagram of the active mechanism of the present invention;

[0026] Figure 5 This is a schematic diagram of the main valve of the present invention;

[0027] Figure 6 This is a schematic diagram of the position of the helical blades in this invention;

[0028] Figure 7 This is a schematic diagram showing the direction of water flow on both sides when the spiral blade of the present invention is working;

[0029] Figure 8 This is a schematic diagram of the cooperation between the spindle and the control board of the present invention;

[0030] Figure 9 This is a schematic diagram showing the location of the buffer mechanism of the present invention;

[0031] Figure 10 This is a structural diagram of the buffer mechanism of the present invention;

[0032] Figure 11 This is a schematic diagram of the claw-shaped element of the present invention;

[0033] Figure 12 This is a cross-sectional view of the keycap of the present invention.

[0034] In the diagram: 1. Upper pump cover; 2. Main shaft; 3. Valve seat; 4. Movable mechanism; 41. Control panel; 42. Claw-shaped element; 43. Return spring; 44. Fixing block; 45. Fixing bolt; 46. Arc-shaped groove; 5. Buffer mechanism; 51. Buffer spring; 52. Connecting block; 53. Keycap; 54. Arc-shaped protrusion; 6. Valve mechanism; 61. Sealing plate; 62. Pressure plate; 63. Main valve; 64. Helical blade; 65. Bushing; 66. Annular hexagonal reinforcing rod; 67. Slow flow hole; 68. Annular groove; 69. Helical groove. Detailed Implementation

[0035] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0036] Example 1: As Figure 1 , Figure 2 As shown, a multi-functional control valve for water pumps includes a valve body, an upper pump cover 1, a main shaft 2, a valve seat 3, a valve mechanism 6, a movable mechanism 4, and a buffer mechanism 5. The valve body is typically installed in water intake, delivery, pressurization, submersible, and sewage pumping stations, as well as in petroleum and chemical fluid transport systems in municipal, construction, steel, metallurgy, petroleum, chemical, water conservancy, and irrigation fields. Both ends of the valve body are fixedly connected to the water pump outlet pipe, with a flange connection between the valve body and the pipe. The upper pump cover 1 is fixedly installed inside the valve body using bolt mounting, and it seals the valve body. The main shaft 2 passes through the upper pump cover 1 and is fixedly installed inside the valve body using vacuum brazing, and it mounts the buffer mechanism 5 and the movable mechanism 4. The valve mechanism 6 is fixedly installed on the valve seat 3 using laser brazing, and it is used to realize… The water flow is controlled by a rapid start-up mechanism that first quickly shuts off 90% of the flow, then slowly shuts off the remaining 10% to prevent backflow, thus achieving unidirectional control. A buffer mechanism 5 is fixedly installed at the lower end of the upper pump cover 1, passing through the main shaft 2 and bonded together. The buffer mechanism 5 works in conjunction with the movable mechanism 4 when the pump is on, restricting the position of the movable mechanism 4. When the pump is off, the buffer mechanism 5 slows the descent speed of the movable mechanism 4, thereby reducing water hammer. A valve seat 3 is fixedly installed on the valve body, using brazing. The valve seat 3 supports the movable mechanism 4, which passes through the main shaft 2 and is mounted on the valve seat 3. When the pump is on, the movable mechanism 4 can rotate and rise along the main shaft 2 with the help of the water flow, thus working with the buffer mechanism 5 to slow the descent speed and reduce water hammer when the pump is off.

[0037] After the valve body is installed, it needs to be primed for the first use. At this time, the operator turns on the water pump in the pipeline. The valve mechanism 6 is subjected to the pressure of the water flow below. When the pressure is greater than the weight of the valve mechanism 6, the valve mechanism 6 will detach from the valve seat 3 under the action of water pressure and rotate upward with the movable mechanism 4. When the movable mechanism 4 contacts the buffer mechanism 5, the movable mechanism 4 stops moving. At this time, the water flow reaches the maximum. When the water pump is turned off, the valve mechanism 6 falls down quickly to close. The movable mechanism 4 drives the buffer mechanism 5 to move downward. When it moves to a certain position, the buffer mechanism 5 disengages, the movable mechanism 4 contacts the valve seat 3, and the control valve is fully closed.

[0038] The valve mechanism 6 achieves a staged descent, quickly blocking most of the water flow while leaving some through holes to allow some water to continue flowing. The buffer mechanism 5 cushions the descent of the movable mechanism 4, thus achieving the staged descent of the valve mechanism 6 and greatly reducing water hammer. It is highly safe and reliable, and its actions are fully interlocked, preventing malfunctions. No manual control is required; when the water pump starts or stops, the pressure changes of the medium before and after the valve are cleverly used to control the power, ensuring the valve operates according to the operating procedures. No professional debugging is required; the valve's action is unaffected by changes in the pump's head and flow rate, making it widely adaptable, virtually maintenance-free, and long-lasting.

[0039] like Figure 3 As shown, the main valve 63 is mounted on the main shaft 2. The main valve 63 is equipped with a ring-shaped hexagonal reinforcing rod 66 to strengthen the mechanical structure and ensure service life. It can rotate around the main shaft 2. The spiral blade 64 is fixedly mounted on the lower end of the main valve 63 and is installed by oxygen-free soldering. The sealing plate 61 is fixedly mounted on the upper end of the main valve 63 and is installed by bolts. The pressure plate 62 is fixedly mounted on the upper end of the sealing plate 61 and is installed by bolts. The movable mechanism 4 is mounted on the upper end of the pressure plate 62. The bushing 65 is fixedly mounted between the main shaft 2 and the main valve 63.

[0040] When the pump is stopped, the main valve 63 and connecting block 52 are fixed to the valve seat 3 under their own weight, and the entire movable mechanism 4 is completely closed. When the pump starts, the water pressure at the inlet reaches more than 50% of the nominal pressure, pushing the valve mechanism 6 and the movable mechanism 4 upward. The movable mechanism 4 is fixed on the main shaft 2 and moves upward. During operation, when the pump is turned on, the main valve 63 is pushed upward by the impact pressure of the water flow below, pushing the sealing plate 61 and the movable mechanism 4. The spiral blade 64 rotates upward in the water flow, thereby driving the main valve 63 to rotate upward. As a result, the claw-shaped element 42 on the movable mechanism 4 is subjected to centrifugal force and moves outward. When the pump is turned off, the main valve 63 falls along the main shaft 2 under the action of gravity, and the movable mechanism 4 falls slowly due to the elastic force of the buffer mechanism 5. The pressure plate 62 is used to enhance the strength of the moving mechanism 4 and reduce the requirements of the operating environment. The sealing plate 61 can achieve a seal in the closed state, so that the water above cannot flow back through the moving mechanism 4, thus achieving the effect of a check valve. The main valve 63 can quickly reduce most of the water flow and then slowly close completely, which can effectively avoid water hammer.

[0041] like Figure 4As shown, the active mechanism 4 includes a control plate 41, a claw-shaped element 42, a return spring 43, a fixing block 44, and fixing bolts 45. The control plate 41 has a through hole in the center for mounting the spindle 2. The radius of the through hole is 4cm, which is the same as the size of the spindle 2. A spiral protrusion is provided at the through hole of the control plate 41. The control plate 41 is rotatably mounted on the main valve 63. The fixing bolts 45 are fixedly mounted on the control plate 41 in a ring array. The mounting method can be welding or bonding. The claw-shaped element 42 has a through hole for fixing the fixing bolts 45. The fixing block 44 is fixedly mounted on the control plate 41. The mounting method is welding. One end of the return spring 43 is fixedly mounted on the fixing block 44, and the other end of the return spring 43 is fixedly connected to the claw-shaped element 42. The mounting method is bonding. The return spring 43 can be a spring and can be made of spring steel.

[0042] During the rotation of the claw-shaped element 42, it will have an outward displacement tendency due to the centrifugal force. Under the fixing action of the fixing bolt 45, it can only rotate around the fixing bolt 45, thereby driving the movable mechanism 4 to move outward. The movable mechanism 4 will generate an inward elastic force due to deformation. When the rotation speed reaches a certain value, the claw-shaped element 42 can lock and jam with the keycap 53, thereby fixing the movable mechanism 4 and the buffer mechanism 5 relatively.

[0043] The moving mechanism 4 utilizes the centrifugal force exerted on the object during rotation to lock and jam the buffer mechanism 5. Through the cooperation of the return spring 43, the fixing block 44 and the fixing bolt 45, the movement of the claw-shaped element 42 can be restricted to outward swinging, thus cooperating with the buffer mechanism 5 to complete the locking and jamming.

[0044] like Figure 5 , Figure 6 As shown, the spiral blades 64 are arranged in a ring array in the annular groove 68 on the lower end face of the main valve 63. One end of the spiral blades 64 is fixedly installed on the main valve 63, and the installation method can be brazing. The fixed-pitch structure is relatively simple, lightweight, low in manufacturing cost, and easy to maintain, making it widely applicable in low-power scenarios. The spiral blades 64 have 10 blades. It can be assumed that the tension coefficient and power coefficient of the spiral blades 64 are proportional to the number of blades. The solidity of the spiral blades 64 is 0.4. Solidity is the ratio of blade area to the rotational area of ​​the spiral blades 64. Its influence is similar to that of the number of blades. As the solidity increases, the tension coefficient and power coefficient increase. However, a larger solidity is not always better. This is determined by the rotational speed and airspeed. A larger solidity of the spiral blades 64 will also result in a larger water-facing area. Water viscosity will reduce efficiency. A solidity of 0.4 can well meet the working requirements, ensuring the water-facing area while also ensuring that the water viscosity effect is small, so that it will not interfere too much with the rotation of the spiral blades 64.

[0045] The diameter of the spiral blade 64 is set to 8cm. The diameter of the spiral blade 64 depends largely on the size of the annular groove 68 of the main valve 63. Within a relative space, the diameter of the spiral blade 64 should be as large as possible so that the spiral blade 64 can obtain a large enough lift force from the water flow, reduce the valve opening time, and improve working efficiency.

[0046] During operation, when the main valve 63 is continuously impacted by the force of the water flow, the spiral blade 64 will generate an upward thrust and a clockwise rotational force. Since the spiral blade 64 and the main valve 63 are fixedly connected by welding, the spiral blade 64 will drive the main valve 63 to rotate and rise.

[0047] For example Figure 7 As shown, when water passes through the helical blade 64, the helical blade 64 is designed with a streamlined curved surface, with a flat upper end and a protruding lower end, thus achieving different water flow rates on both sides of the helical blade 64. During operation, the water flow continuously impacts the helical blade 64, causing the two sides of the helical blade 64 to be subjected to unbalanced forces, generating a counterclockwise downward thrust, which drives the entire moving mechanism 4 to rotate clockwise and rise on the main shaft 2.

[0048] like Figure 8 As shown, the lower part of the main shaft 2 has a spiral groove 69, which can cooperate with the spiral protrusion of the control plate 41. The spiral groove 69 is designed so that when the movable mechanism 4 is subjected to gravity and falls, it contacts the groove, and the gravity is decomposed into forces in two directions, thereby causing the movable mechanism 4 to move along the direction of the groove. The thread diameter is the same as the diameter of the main shaft 2. The height of the groove should not be too long, otherwise the closing process will take too long, and the possibility of the movable mechanism 4 getting stuck in the groove will increase, compromising the stability of the mechanism.

[0049] The groove is coated, and silicon carbide can be used as the coating material. Silicon carbide coating can improve the hardness, wear resistance, and corrosion resistance of the material. Every time the valve is opened or closed, the control plate 41 needs to cooperate with the main shaft 2. The friction will cause some damage to the control plate 41. If ordinary materials are used, it will lead to changes in shape and structure, short service life, and failure of the mechanism. If all are replaced with high-strength materials, the cost will be high and materials will be wasted. Therefore, coating the friction area can strengthen the structural strength and save materials, thus controlling costs while meeting the usage requirements.

[0050] During operation, when the water pump is turned off, the water pressure below the control plate 41 decreases, and the control plate 41 descends under the action of gravity. At this time, the control plate 41 is connected to the buffer mechanism 5. The buffer spring 51 in the buffer mechanism 5 slows down the descent speed of the control plate 41. When the through hole of the control plate 41 contacts the spiral protrusion of the spindle 2, the downward movement under the action of gravity is converted into rotational downward movement. Since the thread is designed to be counterclockwise, the control plate 41 also rotates and descends counterclockwise. At this time, the claw-shaped element 42 will disengage from the keycap 53 and reset under the action of the reset spring 43, thereby realizing the disengagement of the control plate 41 and the buffer mechanism 5. The buffer mechanism 5 resets under the action of the buffer spring 51.

[0051] For example Figure 9 , Figure 10 , Figure 11 As shown, the buffer mechanism 5 includes a buffer spring 51, a connecting block 52, and a keycap 53. The buffer spring 51 is fixedly installed at the lower end of the upper pump cover 1, and the installation method can be set to adhesive bonding. The buffer spring 51 can be made of cobalt-chromium-molybdenum alloy steel. Cobalt-chromium-molybdenum alloy steel has excellent corrosion resistance, good machinability, high strength and rigidity, and can withstand high-intensity and high-stress working environments. The connecting block 52 is fixedly installed at the lower end of the buffer spring 51, and the installation method can be set to adhesive bonding. The keycap 53 is fixedly installed on the lower end face of the connecting block 52, and the installation method is set to adhesive bonding. The keycap 53 has an arc-shaped groove 46 on its inner side for locking the claw-shaped element 42.

[0052] When the water pump is turned on, the movable mechanism 4 rotates under the drive of the spiral blade 64, which causes the claw-shaped element 42 to be displaced outward by centrifugal force. The distance from the keycap 53 to the center of the main shaft 2 is 4mm larger than the distance from the claw-shaped element 42 to the center of the main shaft 2. When the speed of the movable mechanism 4 is greater than 2r / s, it overcomes the return spring 43 and displaces outward by 4mm. At this time, the claw-shaped element 42 and the keycap 53 are locked and stuck. When the water pump is turned off, the main valve 63 descends rapidly under the action of gravity, which promptly stops most of the water flow. At this time, the slow flow holes 67 of the annular array on the main valve 63 can still allow a small amount of water to pass through, reducing the water hammer phenomenon. When the movable mechanism 4 descends, it is pulled by the buffer mechanism 5 and its speed is slower than that of the main valve 63.

[0053] The buffer mechanism 5, in cooperation with the movable mechanism 4, enables the valve mechanism 6 to fall in stages. Utilizing the elastic force of the buffer spring 51, it can be reset, ensuring that each use does not affect the next use, thereby effectively reducing water hammer and protecting equipment safety. The buffer spring 51 can be set to 4, arranged in a circular array. Setting 4 buffer springs 51 can further enhance the stability of the buffer mechanism 5, making its falling process more stable.

[0054] like Figure 10 , Figure 12 As shown, the keycap 53 is made of silicon carbide, which is lighter than many metals. It is a very hard material, with a hardness of 9.5 on the Mohs scale, much harder than traditional materials such as steel. Silicon carbide has excellent thermal stability, maintaining its mechanical properties and chemical stability at high temperatures. Its melting point is approximately 2700 degrees Celsius. Silicon carbide has good corrosion resistance, withstanding the erosion of many acids and alkalis. During operation, the moving mechanism 4 is pushed upward by the rotation of the main valve 63. The claw-shaped element 42 on the moving mechanism 4 is subjected to centrifugal force and moves outward. When the rotation speed of the moving mechanism 4 reaches a certain value, the outward displacement of the claw-shaped element 42 is sufficient to contact the keycap 53, thereby locking it in place. After the water pump is turned off, the keycap 53 restricts the displacement tendency of the claw-shaped element 42, so that the moving mechanism 4 is buffered by the elastic force of the moving mechanism 4 during its descent, thus avoiding the effect of water hammer.

[0055] Example 2: The number of blades of the helical blade 64 can be set to 8, and the solidity can be set to 0.35. The number of blades is directly proportional to its power, while the solidity is inversely proportional to the power. Reducing the number of blades while reducing the solidity can achieve the same effect. When the helical blade 64 is subjected to a certain water pressure, the power of the two examples is basically the same. A smaller number of blades can reduce costs and the probability of damage, but a smaller solidity will cause the helical blade 64 to be prone to clogging. Therefore, in pipelines used to supply water to high-rise buildings in cities, a smaller number of blades and a smaller solidity can be set, because the water supply in this case often has fewer impurities, and the waterworks will clean and filter it in advance, which can reduce cost investment. In sewage treatment plants or oil transportation pipelines, it is recommended to set a larger number of blades and a larger solidity. This helical blade 64 is not prone to clogging, has better output continuity, and a longer service life.

[0056] In operation, the valve body is installed in the middle of the pipeline using a flange connection. For first-time use, priming water needs to be added to the pipeline to prevent the device from running dry. The operator turns on the water pump, and the valve mechanism 6 is pressurized. When the pressure reaches the set value, the valve mechanism 6 disengages from the valve seat 3 and moves upwards. At this time, the spiral blades 64 are impacted by the water flow, causing the movable mechanism 4 to rotate. When the movable mechanism 4 on the connecting block 52 contacts the buffer mechanism 5, the movable mechanism 4 stops moving. At this point, the centrifugal force on the claw-shaped element 42 causes it to overcome the elastic force of the return spring 43 and displace outwards. When the displacement reaches a certain level... When the claw-shaped element 42 and the keycap 53 come into contact, the arc-shaped protrusion 54 and the arc-shaped groove 46 cooperate to lock the movable mechanism 4 in place. When the operator turns off the water pump, the weight of the movable mechanism 4 is greater than the pressure, and the movable mechanism 4 falls onto the valve seat 3. The slow flow hole 67 on the main valve 63 allows a small amount of water to continue to flow through, reducing the water hammer effect. The movable mechanism 4 moves slowly downward against the elastic force of the buffer spring 51. When the movable mechanism 4 comes into contact with the spiral groove 69 on the main shaft 2, the movable mechanism 4 begins to rotate, thereby disengaging the claw-shaped element 42 and the keycap 53. The movable mechanism 4 falls onto the main valve 63, at which point the control valve is completely closed.

[0057] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multi-functional control valve for a water pump, comprising a valve body, an upper pump cover (1), a main shaft (2), and a valve seat (3), characterized in that, The valve body is installed in the pipeline for transporting liquid, and both ends of the valve body are fixedly connected to the water pump outlet pipeline. The valve body and the pipeline are connected by flanges. The upper pump cover (1) is fixedly installed inside the valve body to seal the valve body. The main shaft (2) passes through the upper pump cover (1) and is fixedly installed inside the valve body. A buffer mechanism (5) and a movable mechanism (4) are installed on the main shaft (2). The buffer mechanism (5) is used to clamp and limit the centrifugal force generated by the rotation of the movable mechanism (4) by the flow of water in the pump when the pump is turned on, so that when the pump is turned off, the movable mechanism (4) can overcome the elastic force of the buffer mechanism (5) under the action of gravity and slowly descend, thereby reducing water hammer and extending the service life of the pump. The valve seat ( 3) Fixedly installed inside the valve body, the valve seat (3) is used to support the movable mechanism (4); a valve mechanism (6) is fixedly installed on the valve seat (3), the valve mechanism (6) is controlled by the movable mechanism (4), the movable mechanism (4) drives the valve mechanism (6) to rise, realizing the rapid opening of the control valve; the movable mechanism (4) passes through the main shaft (2) and is installed on the valve mechanism (6), the movable mechanism (4) rotates and rises along the main shaft (2), so that the movable mechanism (4) and the buffer mechanism (5) cooperate, and through the cooperation of the movable mechanism (4) and the buffer mechanism (5), the descent speed of the valve mechanism (6) is slowed down, thereby reducing the water hammer effect; the buffer mechanism (5) passes through the main shaft (2) and is fixedly installed at the lower end of the upper pump cover (1); The movable mechanism (4) includes a control plate (41), a claw-shaped element (42), a return spring (43), a fixing block (44), and fixing bolts (45). The control plate (41) has a through hole in its center, and a spiral protrusion is provided at the through hole. The control plate (41) is rotatably mounted on the main valve (63) of the valve mechanism (6) to achieve rotational connection and separation with the main valve (63). The fixing bolts (45) are fixedly mounted on the control plate (41) in a ring array to realize the rotation of the claw-shaped element (42) during operation. At a fixed angle, the claw-shaped element (42) has an arc-shaped groove (46) and a through hole. The claw-shaped element (42) is fixedly installed on the fixing bolt (45) through the through hole. The fixing block (44) is fixedly installed on the control plate (41) to limit the position of the reset spring (43). One end of the reset spring (43) is fixedly installed on the fixing block (44), and the other end of the reset spring (43) is fixedly connected to the claw-shaped element (42) to overcome centrifugal force and reset the claw-shaped element (42).

2. The multi-functional control valve for a water pump according to claim 1, characterized in that: The buffer mechanism (5) includes a buffer spring (51), a connecting block (52), and a keycap (53). The buffer spring (51) is fixedly installed at the lower end of the upper pump cover (1) to slow down the falling speed of the movable mechanism (4) under the gravity of its downward movement, thereby achieving the slow closing of the main valve (63). The connecting block (52) is fixedly installed at the lower end of the buffer spring (51). The keycap (53) is fixedly installed on the lower end face of the connecting block (52) and engages with the claw-shaped element (42) under the centrifugal force provided by the water flow to lock the movable mechanism (4) and the buffer mechanism (5).

3. A multi-functional control valve for a water pump according to claim 2, characterized in that: The keycap (53) is designed with a hollow interior. The keycap (53) has an arc-shaped protrusion (54) inside to cooperate with the arc-shaped groove (46) of the claw-shaped element (42) to achieve a locking fit and limit the claw-shaped element (42). This can further strengthen the locking effect and extend the service life of the claw-shaped element (42).

4. A multi-functional control valve for a water pump according to claim 3, characterized in that: The valve mechanism (6) includes a sealing plate (61), a pressure plate (62), a main valve (63), a spiral blade (64), and a bushing (65); the sealing plate (61), the pressure plate (62), and the main valve (63) are fixedly installed on the main shaft (2); when the main valve (63) is working, it rotates around the main shaft (2) to realize the opening and closing control of the passage; the spiral blade (64) is fixedly installed at the lower end of the main valve (63) and rotates upward under the drive of the water flow, thereby driving the main valve (63) to rise; the sealing plate (61) is fixedly installed The upper end of the main valve (63) is used to further improve the sealing effect and ensure that water flow is difficult to pass through the valve mechanism (6) during use. The pressure plate (62) is fixedly installed on the upper end of the sealing plate (61) to strengthen the sealing plate (61). The main valve (63) has a spiral groove (69) for cooperating with the main shaft (2) to achieve locking and disengagement. The bushing (65) is fixedly installed between the main shaft (2) and the main valve (63) to reduce friction between the two during movement and extend service life.

5. A multi-functional control valve for a water pump according to claim 4, characterized in that: The main valve (63) has a through hole in the middle for installation with the main shaft (2). The main valve (63) has a ring array of slow-flow holes (67). The main valve (63) has a ring array of hexagonal reinforcing rods (66) to strengthen the mechanical structure of the main valve (63) and extend its service life. The lower end face of the main valve (63) has a ring groove (68).

6. A multi-functional control valve for a water pump according to claim 5, characterized in that: The spiral blades (64) are arranged in an annular array in the annular groove opened on the lower end face of the main valve (63), and the spiral blades (64) are set in the shape of willow leaves.

7. A multi-functional control valve for a water pump according to claim 6, characterized in that: The spiral blade (64) is of fixed spacing and is provided with a water flow channel to further accelerate the flow velocity of the water on both sides to obtain sufficient power; the number of blades of the spiral blade (64) is set to 8-10, and the material of the spiral blade (64) is glass fiber reinforced polymer.

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