Control valve of high-precision automatic flow balance valve

Abstract

The utility model discloses a control valve of a high-precision automatic flow balance valve, which belongs to the technical field of valves, and comprises a valve sleeve component, an inner valve sleeve is arranged in the valve sleeve component, a valve plug component is inserted in the inner valve sleeve, and a valve plug is arranged in the valve plug component. A balance assembly used for balancing water pressure is arranged at the bottom of the valve sleeve assembly. A pressure adjusting assembly used for adjusting the pressure of the water outlet end is arranged at the bottom of the balance assembly, and a flow adjusting assembly used for controlling the water flow is arranged at the top of the valve sleeve assembly. By arranging the flow adjusting assembly, accurate adjustment and stable locking of water flow can be achieved, the adjusting plug can be driven to synchronously rotate by rotating the adjusting wheel, the flow is accurately adjusted by the fact that the water passing hole corresponds to different through-flow areas, meanwhile, the limiting block is matched with the limiting groove in a clamped mode, and an adjusting gear is fixed under the action of the reset spring. And displacement after adjustment is effectively avoided, and the precision and stability of flow output are guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology, specifically relating to a control valve for a high-precision automatic flow balancing valve. Background Technology

[0002] Automatic flow balancing valves are key control components in fluid transport systems. Their core function is to automatically adapt to pressure fluctuations within the system, maintain the stability of the set flow rate in the pipeline, and avoid local overflow or underflow. Through their built-in pressure sensing and flow regulation structure, they can dynamically balance fluid pressure without continuous manual intervention, ensuring uniform flow distribution in each branch of the system. This not only improves system operating efficiency but also reduces energy waste, making them core equipment for ensuring stable, efficient, and energy-saving operation of fluid systems.

[0003] Existing automatic flow balancing valves have some drawbacks. Traditional automatic flow balancing valves lack sufficient flow regulation accuracy and stability. Most valves lack a reliable position locking structure, and after flow regulation, they are prone to displacement due to system pressure fluctuations, resulting in a large deviation between the actual flow and the set value. This fails to meet the requirements of high-precision fluid control. At the same time, the operation of adjusting the outlet pipeline pressure of some automatic flow balancing valves is cumbersome. Some valves do not have the function of directly adjusting the outlet pressure. If it is necessary to adjust the outlet pressure threshold according to the working conditions, the valve must be disassembled and internal components replaced. This is not only complicated and time-consuming, but may also affect the normal operation of the system. The flexibility to adapt to different working conditions is extremely poor. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a control valve for a high-precision automatic flow balancing valve.

[0005] The technical solution adopted to solve the above technical problems is: a control valve for a high-precision automatic flow balancing valve, including a valve sleeve assembly, an inner valve sleeve is provided inside the valve sleeve assembly, a valve plug assembly for controlling water flow is inserted inside the inner valve sleeve, and a balancing component for balancing water pressure is provided at the bottom of the valve sleeve assembly.

[0006] The bottom of the balancing assembly is provided with a pressure regulating component for adjusting the pressure at the outlet, and the top of the valve sleeve assembly is provided with a flow regulating component for controlling the water flow.

[0007] Furthermore, the valve sleeve assembly includes a housing, with a water inlet on one side and a water outlet on the other side. A branch pipe is provided on the inner wall of the housing through the water inlet and the water inlet is connected to a cavity in the pressure regulating assembly through the branch pipe. A water inlet located inside the water inlet is provided on the housing.

[0008] Through the above technical solution, the valve sleeve assembly uses the outer shell as the main carrier and integrates structures such as inlet interface, outlet interface and branch pipe. The water flow from the inlet interface can enter the valve through the inlet, and at the same time, the inlet pressure is transmitted to the cavity of the pressure regulating component through the branch pipe. This structure allows the inlet pressure to participate in the pressure regulation process synchronously, providing a precise pressure signal for subsequent pressure balance and flow control, and ensuring the accuracy of the valve's perception and control of the water flow status.

[0009] Furthermore, the flow regulating component includes a top cover disposed on the top of the housing, a connecting rod inserted into the top cover, an adjusting plug located inside the housing at the bottom of the connecting rod, a water passage hole formed on the side wall of the adjusting plug, a plurality of limiting grooves circumferentially disposed on the outer wall of the connecting rod, a limiting block slidably disposed on the top cover, a return spring disposed on one side surface of the limiting block, the limiting block being engaged in the limiting groove, and an adjusting wheel disposed on the top of the connecting rod.

[0010] Through the above technical solution, the flow regulation component consists of a top cover, a connecting rod, an adjusting plug, and a limiting structure. Rotating the adjusting wheel can drive the connecting rod and the adjusting plug to rotate synchronously. The water passage holes on the side wall of the adjusting plug will correspond to different flow areas. At the same time, the limiting block is locked into the limiting groove of the connecting rod under the action of the return spring, thereby fixing the adjustment level. This structure can not only accurately control the flow size of the water passage holes through the adjusting wheel to regulate the water flow, but also prevent displacement after adjustment by means of the limiting structure, thus ensuring the accuracy and stability of flow regulation.

[0011] Furthermore, the balancing component includes a rubber diaphragm disposed at the bottom of the housing, with diaphragm pads disposed on both the upper and lower surfaces of the rubber diaphragm, a spring bracket disposed on the bottom surface of the inner valve sleeve, and a balancing spring disposed between the rubber diaphragm and the spring bracket.

[0012] Through the above technical solution, the balancing component is mainly composed of a rubber diaphragm, a diaphragm gasket, a spring support, and a balancing spring. The rubber diaphragm can sense the pressure difference between the inlet and outlet. When the pressure fluctuates, the rubber diaphragm will deform, and the elastic force of the balancing spring will drive the valve plug assembly to move. The diaphragm gasket can protect the rubber diaphragm from wear. This structure can automatically balance the pressure fluctuations between the inlet and outlet, keep the water flow stable, and avoid pressure changes interfering with the smooth delivery of the flow.

[0013] Furthermore, the valve plug assembly includes a transmission rod with a plurality of plugs on the transmission rod, a guide plate on the upper surface of the plugs, and one end of the transmission rod fixed to a rubber diaphragm.

[0014] Through the above technical solution, the valve plug assembly consists of a transmission rod, a plug, and a guide plate. The deformation of the rubber diaphragm will drive the transmission rod to move synchronously. The guide plate can limit the movement trajectory of the transmission rod, so that the plug can accurately match the water passage hole of the inner valve sleeve to adjust the flow opening. This structure can automatically adjust the flow on and off and the flow size according to the pressure change, realize the automatic balance of flow, and ensure the stability of the valve output flow.

[0015] Furthermore, the pressure regulating assembly includes a bottom cover disposed on the lower surface of the rubber diaphragm, a top plate disposed inside the bottom cover, a pressure regulating spring disposed on the upper surface of the top plate, a plurality of protrusions disposed on the edge of the top plate, a plurality of guide grooves disposed on the inner wall of the bottom cover, the protrusions sliding in the guide grooves, a screw disposed at the bottom of the bottom cover, the screw threadedly engaging with the bottom plate of the bottom cover, one end of the screw being fixed to the bottom of the top plate, and the other end of the screw being provided with an internal hexagonal sleeve.

[0016] Through the above technical solution, the pressure regulating component consists of a bottom cover, a top plate, a pressure regulating spring, and a screw. By rotating the screw with the help of an internal hexagonal sleeve, the top plate can be moved along the guide groove and protrusion of the bottom cover, thereby adjusting the compression of the pressure regulating spring to set the outlet pressure threshold. This structure can accurately adjust the outlet pressure according to actual needs, and the guide structure ensures the stability of the top plate movement, improving the accuracy and reliability of pressure regulation.

[0017] Furthermore, the inner valve sleeve includes an inner valve core disposed inside the outer shell. Both the upper and lower end faces of the inner valve core are provided with water passage holes. A sealing ring is provided at the lower end of the water passage hole. A water outlet is provided on one side of the inner valve core. The inner valve core is connected to the water outlet interface through the water outlet.

[0018] Through the above technical solution, the inner valve sleeve takes the internal valve core as its core, and the water passage holes at its upper and lower ends, together with the plug of the valve plug assembly, control the flow of water. The sealing ring can prevent water leakage, and the outlet connects the inner valve core with the outlet interface. This structure can regulate the flow path of water in the valve, improve the sealing performance of the valve, and at the same time ensure that the water flow is stably delivered to the outlet end according to the control requirements, thereby enhancing the reliability of the valve's water flow control.

[0019] The beneficial effects of this utility model are as follows: (1) By setting a flow rate adjustment component, this utility model can achieve precise control and stable locking of water flow. Rotating the adjustment wheel can drive the adjustment plug to rotate synchronously. By using the water passage hole to correspond to different flow areas, the flow rate can be precisely adjusted. At the same time, the locking cooperation between the limit block and the limit groove can fix the adjustment position under the action of the reset spring, effectively avoiding displacement after adjustment and ensuring the accuracy and stability of the flow output; (2) By setting a pressure adjustment component, this utility model can flexibly adapt to different water pressure requirements and ensure the reliability of adjustment. By using the internal hexagonal sleeve to rotate the screw, the top plate can be driven to move smoothly along the guide groove, accurately Adjust the compression of the pressure regulating spring to set the pressure threshold at the outlet end. The guide structure prevents the top plate from shifting, making the pressure regulation more accurate, adapting to the pressure regulation requirements of the water supply system, and improving the stability of the system operation; (3) This utility model can sense the pressure difference in real time through the rubber diaphragm of the balance component, and drive the valve plug component to move in conjunction with the balance spring, automatically adjusting the flow opening to balance the pressure fluctuation. The water passage hole of the inner valve sleeve and the plug are precisely matched, and the sealing ring ensures the sealing and prevents leakage, standardizing the water flow path. The whole structure can automatically adapt to pressure changes without manual intervention, avoid water flow fluctuation, and at the same time improve the valve sealing performance and water flow control reliability, and extend the service life. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural view of the present invention;

[0021] Figure 2 This is a structural cross-sectional view of the present invention;

[0022] Figure 3 This is a cross-sectional view of the valve sleeve assembly structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the balancing component structure of this utility model;

[0024] Figure 5 This is a schematic diagram of the flow regulation component structure of this utility model.

[0025] Reference numerals: 1. Valve sleeve assembly; 101. Housing; 102. Inlet port; 103. Outlet port; 104. Inlet; 105. Branch pipe; 2. Flow regulating assembly; 201. Top cover; 202. Connecting rod; 203. Adjusting plug; 204. Water passage hole; 205. Limiting groove; 206. Limiting block; 207. Return spring; 208. Adjusting wheel; 3. Pressure regulating assembly; 301. Base cover; 302. Pressure regulating spring 303. Top plate; 304. Guide groove; 305. Screw; 306. Protrusion; 307. Socket sleeve; 4. Inner valve sleeve; 401. Inner valve core; 402. Water passage hole; 403. Sealing ring; 404. Water outlet; 5. Valve plug assembly; 501. Transmission rod; 502. Guide plate; 503. Plug; 6. Balance assembly; 601. Rubber diaphragm; 602. Balance spring; 603. Spring bracket; 604. Diaphragm gasket. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0027] like Figures 1-5 As shown, the control valve of a high-precision automatic flow balancing valve in this embodiment includes a valve sleeve assembly 1. The valve sleeve assembly 1 includes a housing 101, which is integrally cast from QT450 ductile iron, resulting in high strength and corrosion resistance. The inner wall is precision machined to reduce water flow resistance and turbulence. A water inlet 102 is provided on one side of the housing 101, and a water outlet 103 is provided on the other side. Both the water inlet 102 and the water outlet 103 adopt a flange design to adapt to standard pipe connections. A sealing gasket is built into the interface to prevent leakage. A branch pipe 105 is provided on the inner wall of the outer casing 101. The branch pipe 105 is a pressure sensing channel. One end is connected to the water inlet 104 of the water inlet interface 102, and the other end reaches the bottom of the rubber diaphragm 601 of the balancing component 6. It can transmit the water inlet pressure in real time and provide a signal basis for automatic balancing. The water inlet interface 102 is connected to the cavity in the pressure regulating component 3 through the branch pipe 105. The outer casing 101 is provided with a water inlet 104 located in the water inlet interface 102. The water inlet 104 is designed in a funnel shape to reduce the water inlet resistance and reduce pressure loss.

[0028] like Figures 2-3As shown, the valve sleeve assembly 1 of this embodiment is provided with an inner valve sleeve 4. The inner valve sleeve 4 includes an inner valve core 401 disposed inside the outer shell 101. Water passage holes 402 are provided on both the upper and lower end faces of the inner valve core 401. The water passage holes 402 at the upper and lower end faces are symmetrically distributed. A sealing ring 403 is provided at the lower end of the water passage hole 402. The sealing ring 403 at the lower end of the water passage hole 402 is made of nitrile rubber to ensure a tight fit with the plug 503 of the valve plug assembly 5 to achieve a sealed stop. A water outlet 404 is provided on one side of the inner valve core 401. The inner valve core 401 is connected to the water outlet interface 103 through the inner water outlet 404. The water outlet 404 and the water outlet interface 103 are precisely aligned. The flow channel is designed to be streamlined to reduce the resistance along the flow path.

[0029] like Figures 2-4 As shown, this embodiment includes an internally inserted valve plug assembly 5 for controlling water flow. The valve plug assembly 5 includes a transmission rod 501, which is made of 45# steel with high strength after heat treatment. Several plugs 503 are provided on the transmission rod 501, and the number of plugs 503 is adapted to the water passage hole 402. The plugs 503 are made of wear-resistant polyurethane material with a smooth surface. Their cooperation with the water passage hole 402 can accurately control the water flow cross-sectional area. A guide plate 502 is provided on the upper surface of the plug 503. The guide plate 502 has a cross-shaped structure and slides against the inner wall of the outlet 404 to prevent the transmission rod 501 from deviating. One end of the transmission rod 501 is fixed to the rubber diaphragm 601 by a pressure ring, which is firmly connected to ensure that the pressure change of the rubber diaphragm 601 can be synchronously transmitted to the plug 503.

[0030] like Figures 2-4 As shown, the bottom of the valve sleeve assembly 1 in this embodiment is provided with a balancing component 6 for balancing water pressure. The balancing component 6 includes a rubber diaphragm 601 disposed at the bottom of the outer shell 101. The rubber diaphragm 601 is made of nylon-reinforced nitrile rubber and can accurately sense the pressure difference between the upper and lower surfaces. The upper and lower surfaces of the rubber diaphragm 601 are provided with diaphragm gaskets 604. The diaphragm gaskets 604 are made of stainless steel thin plates to protect the diaphragm from wear and to uniformly transmit pressure. The bottom surface of the inner valve sleeve 4 is provided with a spring bracket 603. The spring bracket 603 provides stable support for the balancing spring 602 and has a certain limiting and guiding effect on the transmission rod 501. The balancing spring 602 is disposed between the rubber diaphragm 601 and the spring bracket 603. The balancing spring 602 is a cylindrical helical spring. The initial preload can be preset according to the pipeline conditions. The pressure fluctuation is offset by elastic deformation, which drives the valve plug assembly 5 to dynamically adjust and maintain stable flow.

[0031] like Figure 3As shown, the bottom of the balancing component 6 in this embodiment is provided with a pressure regulating component 3 for adjusting the pressure at the outlet end. The pressure regulating component 3 includes a bottom cover 301 disposed on the lower surface of the rubber diaphragm 601. The bottom cover 301 is made of ductile iron. A top plate 303 is disposed inside the bottom cover 301. The top plate 303 is a circular steel plate. A pressure regulating spring 302 is disposed on the upper surface of the top plate 303. The pressure regulating spring 302 works in conjunction with the balancing spring 602 to set the outlet end pressure threshold by adjusting the preload. Several protrusions 306 are disposed on the edge of the top plate 303. Several guide grooves 304 are disposed on the inner wall of the bottom cover 301. Block 306 slides within guide groove 304. The protrusion 306 on the edge of top plate 303 slides in conjunction with guide groove 304 on inner wall of bottom cover 301 to ensure vertical lifting and lowering of top plate 303 and prevent displacement. Bottom of bottom cover 301 is provided with screw 305, which has a trapezoidal thread design and is threaded in conjunction with bottom plate of bottom cover 301. By rotating screw 305, the height of top plate 303 can be precisely adjusted, thereby changing the preload of pressure regulating spring 302 to adjust water pressure. One end of screw 305 is fixed to bottom of top plate 303, and the other end of screw 305 is provided with internal hex socket 307, which is easy to operate with a wrench.

[0032] like Figure 5 As shown, the valve sleeve assembly 1 of this embodiment is provided with a flow regulating assembly 2 for controlling the water flow rate at its top. The flow regulating assembly 2 includes a top cover 201 provided on the top of the outer shell 101. The top cover 201 is fixed to the outer shell 101 by bolts, providing excellent sealing performance. A connecting rod 202 is inserted into the top cover 201. An adjusting plug 203 located inside the outer shell 101 is provided at the bottom of the connecting rod 202. A water passage hole 204 is provided on the side wall of the adjusting plug 203. The water passage hole 204 corresponds to the water passage hole 402 of the inner valve core 401. A plurality of limiting grooves 205 are provided circumferentially on the outer wall of the connecting rod 202. A limiting block 206 is slidably provided on the top cover 201. A return spring 207 is provided on one side of the surface. The return spring 207 on one side of the limiting block 206 provides a preload force to ensure that the limiting block 206 is tightly engaged in the limiting groove 205. The limiting block 206 is engaged in the limiting groove 205. The limiting groove 205 cooperates with the limiting block 206 on the top cover 201 to lock the flow rate and prevent flow deviation caused by misoperation. An adjusting wheel 208 is provided on the top of the connecting rod 202. Rotating the top adjusting wheel 208 can drive the adjusting plug 203 to rotate, changing the conduction area of ​​the water passage 204 to achieve flow preset. The surface of the adjusting wheel 208 is provided with anti-slip texture for easy manual operation and is marked with flow scale to intuitively display the preset value.

[0033] Working principle: Rotating the adjusting wheel 208 drives the adjusting plug 203 to rotate. Based on the target flow rate required by the pipeline, the conduction area of ​​the water passage hole 204 is adjusted according to the scale on the adjusting wheel 208. After adjustment, the limit block 206 automatically engages in the corresponding limit groove 205, locking the preset flow value. Then, a wrench is inserted into the internal hexagonal socket 307 of the pressure regulating component 3, and the screw 305 is rotated, causing the top plate 303 to rise and fall, adjusting the preload of the pressure regulating spring 302. According to the designed pressure at the outlet, rotating the screw 305 clockwise increases the preload, and rotating it counterclockwise decreases it. After setting, the pipeline valve is opened, and water flows through the inlet 104 of the inlet interface 102 into the valve sleeve assembly 1. The water flows through the water passage hole 402 and outlet 404 of the inner valve sleeve 4 to the outlet interface 103. Another portion of the water flows through the branch... The flow tube 105 transmits the pressure to the rubber diaphragm 601 below the balancing component 6, providing real-time feedback on the inlet pressure. The rubber diaphragm 601 senses the pressure difference between the upper and lower surfaces. When the inlet pressure increases, the diaphragm deforms upward, compressing the balancing spring 602 and driving the transmission rod 501 to rise. This causes the plug 503 to block part of the water passage 402, reducing the conduction area and limiting the increase in flow. When the inlet pressure decreases, the balancing spring 602 rebounds, driving the transmission rod 501 to fall. The plug 503 opens the water passage 402, increasing the conduction area and supplementing the flow, ensuring that the flow is stable at the preset value. When the pipeline system pressure fluctuates, the balancing component 6 continuously senses the pressure change, and the valve plug component 5 adjusts the position of the plug 503 in real time to maintain flow balance. If it is necessary to adjust the outlet pressure, the screw 305 can be rotated again to fine-tighten the pressure regulating spring 302.

[0034] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model.

Claims

1. A control valve for a high-precision automatic flow balancing valve, comprising a valve sleeve assembly (1), characterized in that: The valve sleeve assembly (1) is provided with an inner valve sleeve (4), and a valve plug assembly (5) for controlling water flow is inserted into the inner valve sleeve (4). A balancing assembly (6) for balancing water pressure is provided at the bottom of the valve sleeve assembly (1). The bottom of the balancing component (6) is provided with a pressure regulating component (3) for adjusting the pressure at the outlet end, and the top of the valve sleeve component (1) is provided with a flow regulating component (2) for controlling the water flow.

2. The control valve of the high-precision automatic flow balancing valve according to claim 1, characterized in that, The valve sleeve assembly (1) includes a housing (101), with a water inlet (102) on one side of the housing (101) and a water outlet (103) on the other side of the housing (101). A branch pipe (105) is provided on the inner wall of the water inlet (102) and the water inlet (102). The water inlet (102) is connected to the cavity in the pressure regulating assembly (3) through the branch pipe (105). A water inlet (104) is provided on the housing (101) located in the water inlet (102).

3. The control valve of the high-precision automatic flow balancing valve according to claim 2, characterized in that, The flow regulating component (2) includes a top cover (201) disposed on the top of the housing (101), a connecting rod (202) inserted into the top cover (201), an adjusting plug (203) disposed at the bottom of the connecting rod (202) and located inside the housing (101), a water passage hole (204) being opened on the side wall of the adjusting plug (203), a plurality of limiting grooves (205) being disposed around the outer wall of the connecting rod (202), a limiting block (206) being slidably disposed on the top cover (201), a return spring (207) being disposed on one side surface of the limiting block (206), the limiting block (206) being engaged in the limiting groove (205), and an adjusting wheel (208) being disposed at the top of the connecting rod (202).

4. The control valve of the high-precision automatic flow balancing valve according to claim 2, characterized in that, The balancing component (6) includes a rubber diaphragm (601) disposed at the bottom of the outer shell (101), with diaphragm pads (604) disposed on both the upper and lower surfaces of the rubber diaphragm (601), a spring bracket (603) disposed on the bottom surface of the inner valve sleeve (4), and a balancing spring (602) disposed between the rubber diaphragm (601) and the spring bracket (603).

5. The control valve of the high-precision automatic flow balancing valve according to claim 4, characterized in that, The valve plug assembly (5) includes a transmission rod (501), on which a plurality of plugs (503) are provided. A guide plate (502) is provided on the upper surface of the plugs (503). One end of the transmission rod (501) is fixed on a rubber diaphragm (601).

6. The control valve of the high-precision automatic flow balancing valve according to claim 4, characterized in that, The pressure regulating assembly (3) includes a bottom cover (301) disposed on the lower surface of a rubber diaphragm (601), a top plate (303) disposed inside the bottom cover (301), a pressure regulating spring (302) disposed on the upper surface of the top plate (303), a plurality of protrusions (306) disposed on the edge of the top plate (303), a plurality of guide grooves (304) disposed on the inner wall of the bottom cover (301), the protrusions (306) sliding in the guide grooves (304), a screw (305) disposed at the bottom of the bottom cover (301), the screw (305) being threadedly engaged with the bottom plate of the bottom cover (301), one end of the screw (305) being fixed to the bottom of the top plate (303), and the other end of the screw (305) being provided with an internal hexagonal sleeve (307).

7. The control valve of the high-precision automatic flow balancing valve according to claim 2, characterized in that, The inner valve sleeve (4) includes an inner valve core (401) disposed inside the outer shell (101). The inner valve core (401) has water passage holes (402) on both its upper and lower end faces. A sealing ring (403) is provided at the lower end of the water passage hole (402). A water outlet (404) is provided on one side of the inner valve core (401). The inner valve core (401) is connected to the water outlet interface (103) through the water outlet (404).

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