Bidirectional flow regulating valve

Abstract

The invention discloses a bidirectional flow regulating valve, and relates to the technical field of flow regulating valves, the bidirectional flow regulating valve comprises a left valve body, a rocker arm is arranged on one side of the left valve body, a spacer bush is arranged on the other side of the rocker arm, a shaft sleeve is arranged on the inner wall of the spacer bush, a valve rod is arranged in the shaft sleeve, and a connecting rod is arranged at the bottom of the valve rod; by arranging a series of adjusting assemblies such as the valve body, the valve shaft, the crank rocker arm mechanism, the connecting rod, the piston, the sleeve and the piston sealing plate, the valve body of the piston type flow and pressure adjusting valve is divided into an inner layer and an outer layer, and a medium flows in a valve cavity between the inner layer and the outer layer of the valve body.

Description

Technical Field

[0001] The invention relates to the technical field of flow regulating valves, in particular to a bidirectional flow regulating valve. Background Art

[0002] The flow regulating valve controls the flow of the medium through the regulating device. Its working principle is as follows: when the medium passes through the flow regulating valve, the pressure gauge and differential pressure sensor are arranged before and after the flow regulating valve to collect data and transmit it to the PLC control system. The system automatically adjusts the valve opening by collecting the changes in the differential pressure signal before and after the valve. The position and opening of the valve core can be adjusted by the electric actuator. The flow regulating valve has the advantages of high adjustment accuracy, fast response speed, and strong reliability. It can improve production efficiency, reduce energy consumption and cost, and is widely used in various flow control scenarios, such as water plants, sewage treatment plants, and drainage pipe management12.

[0003] Existing flow regulating valves are mostly unidirectional due to structural limitations of the outlet form, and the medium can only flow in one direction. Once used in the reverse direction, they lose their unique properties such as anti-cavitation and shock absorption.

[0004] Therefore, we designed a two-way flow regulating valve to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a two-way flow regulating valve to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides a two-way flow regulating valve, including a left valve body, a rocker arm is provided on one side of the left valve body, a spacer sleeve is provided on the other side of the rocker arm, a shaft sleeve is provided on the inner wall of the spacer sleeve, a valve stem is provided inside the shaft sleeve, and a connecting rod is provided at the bottom of the valve stem.

[0007] Furthermore, a connecting pad is overlapped at the bottom and top of the other end of the connecting rod, a sliding sleeve is provided on the other side of the connecting pad, a spring washer and a connecting pin are respectively provided at the top and bottom of the sliding sleeve, a rocker arm is fixedly connected to one side of the sliding sleeve, a hexagonal nut is provided on the top of the spring washer, and a cotter pin is inserted at the top of the hexagonal nut.

[0008] Furthermore, an actuator is arranged on the top of the valve stem, and a packing gland is arranged on the bottom of one side of the actuator.

[0009] Furthermore, a sleeve is provided at the bottom of the sliding sleeve, a sealing ring is provided at the bottom of the sleeve, a piston sealing plate is provided on one side of the sealing ring, and a right valve body is provided on the other side of the sealing ring.

[0010] Furthermore, a valve shaft O-ring is arranged between the valve stem and the top of the sleeve.

[0011] Furthermore, an O-ring is provided at the bottom of one side of the piston sealing plate.

[0012] Furthermore, a pipeline is provided on the other side of the sealing ring, and the other end of the pipeline is connected to the bottom of the right valve body.

[0013] Furthermore, the piston sealing plate, the sealing ring and the sleeve are arranged symmetrically in the upper and lower parts.

[0014] Compared with the prior art, the beneficial effects of the present invention are: by setting a series of adjusting components such as valve body, valve shaft, crank rocker arm mechanism, connecting rod, piston, sleeve, piston sealing plate, etc., the valve body of the piston-type flow and pressure regulating valve is divided into inner and outer layers, and the medium flows in the valve cavity between the inner and outer layers of the valve body.

[0015] Compared with the prior art, the invention has the following beneficial effects: when the pressure in the pipeline changes direction, the piston sealing plate is pushed from the high-pressure side to the low-pressure side, the electric actuator receives the standard flow signal to act, drives the valve shaft to rotate through the gear box, and the valve shaft drives the piston in the valve cavity to move forward and backward along the pipeline axis through the crank mechanism, changing the flow channel area and achieving the purpose of flow regulation and pressure regulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the full cross-section structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the connecting structure of the connecting rod and the sliding sleeve of the present invention;

[0018] Figure 3 It is a schematic diagram of the connecting structure of the connecting rod and the rocker arm of the present invention.

[0019] In the figure: 1. left valve body; 2. connecting rod; 3. rocker arm; 4. spacer; 5. piston sealing plate; 6. sealing ring; 7. sleeve; 8. sliding sleeve; 9. right valve body; 10. valve stem; 11. shaft sleeve; 12. valve shaft O-ring; 13. packing gland; 14. actuator; 15. O-ring; 16. connecting pin; 17. connecting stopper; 18. spring washer; 19. hexagonal nut; 20. cotter pin. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 1-3The present invention provides a technical solution: a two-way flow regulating valve, comprising a left valve body 1, a rocker arm 3 is arranged on one side of the left valve body 1, a spacer sleeve 4 is arranged on the other side of the rocker arm 3, a shaft sleeve 11 is arranged on the inner wall of the spacer sleeve 4, a valve stem 10 is arranged inside the shaft sleeve 11, a connecting rod 2 is arranged at the bottom of the valve stem 10, a connecting washer 17 is overlapped at the bottom and top of the other end of the connecting rod 2, a sliding sleeve 8 is arranged on the other side of the connecting washer 17, a spring washer 18 and a connecting pin 16 are respectively arranged at the top and bottom of the sliding sleeve 8, a rocker arm 3 is fixedly connected to one side of the sliding sleeve 8, a hexagonal nut 19 is arranged on the top of the spring washer 18, and a cotter pin 20 is inserted at the top of the hexagonal nut 19.

[0022] In specific implementation, the two-way flow regulating valve is provided with a series of regulating components such as a valve body, a valve shaft, a crank rocker mechanism, a connecting rod 2, a piston, a sleeve 7, a piston sealing plate 5, etc. The valve body of the piston-type flow regulating and pressure regulating valve is divided into two layers, an inner layer and an outer layer, and the medium flows in the valve cavity between the inner and outer layers of the valve body. The interior of the valve core is divided into a left cavity and a right cavity, which are divided by a piston sealing plate 5. A piston cylinder is formed between the piston sealing plate 5 and the inner wall of the right valve body 9, and a sleeve 7 is fixed on the piston cavity. The structure of the sleeve 7 can be divided into: slotted type, fan blade ring type, hole type, multi-stage circular hole type, etc.

[0023] See also Figure 1-3 As shown, an actuator 14 is provided on the top of the valve stem 10, a packing gland 13 is provided on the bottom of one side of the actuator 14, a sleeve 7 is provided on the bottom of the sliding sleeve 8, a sealing ring 6 is provided on the bottom of the sleeve 7, a piston sealing plate 5 is provided on one side of the sealing ring 6, and a right valve body 9 is provided on the other side of the sealing ring 6. A valve shaft O-ring 12 is provided between the valve stem 10 and the top of the sleeve 11, an O-ring 15 is provided on the bottom of one side of the piston sealing plate 5, and a pipeline is provided on the other side of the sealing ring 6, and the other end of the pipeline is connected to the bottom of the right valve body 9. The piston sealing plate 5, the sealing ring 6 and the sleeve 7 are symmetrically arranged up and down.

[0024] During specific implementation, when the medium pressure in the pipeline increases, the piston sealing plate 5 is pushed from the high-pressure side to the low-pressure side, and the electric actuator receives the standard signal to act, driving the valve shaft to rotate through the gear box. The valve shaft drives the piston in the valve chamber to move forward and backward along the axial direction of the pipeline through the crank mechanism, thereby changing the flow channel area and achieving the purpose of flow regulation and pressure regulation.

[0025] The flow regulating valve adopts axial flow design, guiding the medium to flow smoothly around the piston in the valve. The annular flow channel area decreases continuously from the inlet to the contraction section, and the flow rate gradually increases, without generating local low pressure, thus avoiding cavitation. Due to the axial flow design, the medium at the outlet will perform a mutual offset and energy dissipation, and the bubbles formed by cavitation are confined to the center of the pipe and surrounded by water; even if the bubbles collapse, they will not cause any cavitation damage because they are far away from the pipe and valve wall, thus extending the service life of the pipe.

[0026] The piston sealing plate 5 structure of the two-way flow regulating valve enables the valve to achieve two-way adjustment. When the valve is fully closed, the two sealing rings 6 are in working state at the same time to ensure the sealing performance of the valve. Therefore, the greater the pressure difference before and after the pipeline, the better the sealing effect of the piston sealing plate 5. Generally, pressure gauges and pressure difference sensors are arranged before and after the flow regulating valve in the pipeline, and the collected data is transmitted to the PLC control system. The system automatically adjusts the valve opening by collecting the changes in the pressure difference signal before and after the valve.

[0027] In addition, the two-way flow regulating valve has been widely used in large-scale water delivery projects due to its high regulation accuracy, low cavitation, noise and vibration, and good energy dissipation effect. The two-way flow regulating valve has the advantages of high regulation accuracy, fast response speed, and strong reliability. It can improve production efficiency, reduce energy consumption and costs. The two-way flow regulating valve is widely used in various flow control scenarios. By adjusting the position of the valve core, the flow and pressure can be accurately controlled. When the medium flow or pressure changes, the valve core will automatically adjust the opening to keep the set flow or pressure unchanged, realizing the two-way regulation function.

[0028] In addition, the valve body is divided into a left valve body 1 and a right valve body 9. The main function of the valve body is to connect pipelines, realize fluid passages, and withstand fluid pressure. It not only contacts various media, but also withstands the pressure from the fluid. Therefore, it must meet the requirements of various aspects such as use pressure, temperature, erosion, and corrosion conditions. Therefore, the valve body needs to be manufactured with high-precision manufacturing technology and use high-quality materials to ensure its stability and durability during use.

[0029] In addition, the valve shaft mainly plays a role of connection and transmission in the valve. It is an important part of the valve, responsible for connecting the valve's opening and closing parts and the operating mechanism, and transmitting the operating force so that the opening and closing parts can open or close according to the operating requirements. Through the valve shaft, the operating force can be transmitted to the valve to realize the valve's opening and closing functions, thereby controlling the flow of the fluid.

[0030] In addition, the crank rocker mechanism mainly plays the role of connection, transmission and realization of specific mechanical actions. It transmits power to the rocker arm 3 through the rotation of the crank, and then drives the valve opening and closing piston to move axially to achieve flow regulation and control. The design of the crank rocker mechanism enables the two-way flow regulating valve to flexibly and accurately adjust the fluid flow to meet different process requirements. At the same time, the material and manufacturing process of the crank rocker mechanism also directly affect the performance and life of the valve.

[0031] In addition, the connecting rod 2 mainly plays the role of transmission and regulation in the two-way flow regulating valve. As an important component of the two-way flow regulating valve, the connecting rod 2 is responsible for connecting the piston and the driving device of the valve. It transmits the operating force to enable the piston to open or close, thereby adjusting the flow of the pipeline medium. The connecting rod 2 is combined with the crank rocker arm mechanism of the two-way flow regulating valve, so that the valve opening and flow are linearly related. This design enables the connecting rod 2 to achieve precise adjustment during the adjustment process to meet different process requirements.

[0032] The adjusting sleeve 7 is designed according to the user's working conditions to meet different use requirements. The sleeve 7 is designed to consider the continuity of flow rate change to avoid sudden changes, which can effectively reduce noise and vibration.

[0033] In addition, the piston sealing plate 5 mainly plays the role of sealing and changing the regulating direction in the two-way flow regulating valve. The piston sealing plate 5 maintains the seal between the high-pressure side and the low-pressure side of the valve body outside the flow regulating valve to ensure that the water on the high-pressure side enters the low-pressure side through the throttle hole. The piston sealing plate 5 is combined with the crank rocker arm mechanism of the two-way flow regulating valve to achieve flow regulation through the axial movement of the piston. Since the valve opening and flow are linearly related, precise regulation can be achieved.

[0034] In addition, the valve shaft O-ring 12 mainly plays a sealing role in the two-way flow regulating valve. The valve shaft O-ring 12 produces a sealing effect by axially or radially compressing the cross-section. When the fluid pressure increases, the deformation of the valve shaft O-ring will enhance the sealing function. To obtain the best sealing effect, a valve shaft O-ring with a ring diameter as large as possible should be selected to ensure the reliability and stability of the seal.

[0035] In addition, the packing gland 13 mainly plays a sealing role in the two-way flow regulating valve. The main function of the packing gland 13 is to compress the packing to ensure a good sealing contact between the packing and the valve stem 10 or the shaft. By compressing the packing, the packing gland 13 helps to maintain the sealing state of the packing and prevent the medium from leaking due to the movement of the valve stem 10. A good sealing effect helps to prevent the medium from leaking out and ensure the normal operation of the valve and the stability of the process.

[0036] In addition, the actuator 14 plays a vital role in the two-way flow regulating valve: 1. It can change the fluid flow rate. The actuator 14 changes the fluid flow rate with the help of power operation by receiving the control signal output by the regulating control unit. This is its most basic and most important function; 2. It can realize automatic control. In the automation system, the actuator 14 can respond to the requirements of downstream flow or pressure and automatically adjust the valve core position to balance the downstream flow or pressure and realize precise flow control; 3. It can adapt to a variety of working conditions. The actuator 14 can adapt to different working conditions.

[0037] In addition, the valve stem 10 plays a connecting and transmission role in the two-way flow regulating valve. The lower end of the valve stem 10 is fixedly connected to the gate cylinder plate through a valve stem hinge structure to ensure a stable connection between the valve stem 10 and the gate cylinder. The valve stem 10, as a transmission component, is responsible for transmitting the operating force so that the gate cylinder can move in the valve body, thereby changing the flow area between the valve core and the valve seat to achieve the purpose of regulating the flow of the measured medium.

[0038] In addition, the O-ring 15 mainly plays a sealing role in the two-way flow regulating valve. The O-ring 15 is installed in the sealing groove of the two-way flow regulating valve to prevent leakage of liquid or gaseous media by pressing, thereby ensuring the sealing performance of the valve. Within the working pressure and a certain temperature range, the O-ring 15 should have good sealing performance and can automatically improve the sealing performance as the pressure increases. The O-ring 15 has strong corrosion resistance, does not corrode the contact surface, does not pollute the medium, is not easy to age, has a long working life, has good wear resistance, has a simple structure, and is easy to use and maintain, so that the O-ring 15 has a longer service life and has good self-lubricating properties and can be used as an oil-free lubricated seal.

[0039] In addition, the connecting gasket 17 can also cushion the impact of the valve core movement to a certain extent, protect the internal structure of the valve, and extend the service life. The material and performance of the connecting gasket 17 need to be selected according to the specific working environment and fluid medium to ensure its sealing and durability.

[0040] In addition, the spring washer 18 mainly plays an anti-loosening role in the two-way flow regulating valve. The spring washer 18 generates a force to resist loosening through its elastic part when the bolt or nut is tightened, thereby preventing the two-way flow regulating valve from loosening due to vibration or other stresses during operation, thereby improving the reliability and safety of the equipment. In the two-way flow regulating valve with high air tightness requirements, the spring washer 18 not only improves the valve's fastening performance and stability, but also helps to ensure air tightness and prevent gas leakage.

[0041] Working principle: The two-way flow regulating valve is provided with a series of regulating components such as valve body, valve shaft, crank rocker mechanism, connecting rod 2, piston, sleeve 7, piston sealing plate 5, etc. The valve body of the piston flow regulating and pressure regulating valve is divided into two layers, inner and outer, and the medium flows in the valve cavity between the inner and outer layers of the valve body. The interior of the valve core is divided into a left cavity and a right cavity, which are divided by the piston sealing plate 5. A piston cylinder is formed between the piston sealing plate 5 and the inner wall of the right valve body 9, and a sleeve 7 is fixed on the piston cavity. The structure of the sleeve 7 can be divided into: slotted type, fan blade ring type, hole type, multi-stage round hole type, etc.

[0042] When the medium pressure in the pipeline increases, the piston sealing plate 5 is pushed from the high-pressure side to the low-pressure side, and the electric actuator receives the standard signal to act, driving the valve shaft to rotate through the gear box. The valve shaft drives the piston in the valve cavity to move forward and backward along the axial direction of the pipeline through the crank mechanism, changing the flow channel area to achieve the purpose of flow regulation and pressure regulation.

[0043] The flow regulating valve adopts axial flow design, guiding the medium to flow smoothly around the piston in the valve. The annular flow channel area decreases continuously from the inlet to the contraction section, and the flow rate gradually increases, without generating local low pressure, thus avoiding cavitation. Due to the axial flow design, the medium at the outlet will perform a mutual offset and energy dissipation, and the bubbles formed by cavitation are confined to the center of the pipe and surrounded by water; even if the bubbles collapse, they will not cause any cavitation damage because they are far away from the pipe and valve wall, thus extending the service life of the pipe.

[0044] The piston sealing plate 5 structure of the two-way flow regulating valve enables the valve to achieve two-way adjustment. When the valve is fully closed, the two sealing rings 6 are in working state at the same time to ensure the sealing performance of the valve. Therefore, the greater the pressure difference before and after the pipeline, the better the sealing effect of the piston sealing plate 5. Generally, pressure gauges and pressure difference sensors are arranged before and after the flow regulating valve in the pipeline, and the collected data is transmitted to the PLC control system. The system automatically adjusts the valve opening by collecting the changes in the pressure difference signal before and after the valve.

Claims

1. A two-way flow regulating valve, comprising a left valve body (1), characterized in that: A rocker arm (3) is arranged on one side of the left valve body (1), a spacer sleeve (4) is arranged on the other side of the rocker arm (3), a shaft sleeve (11) is arranged on the inner wall of the spacer sleeve (4), a valve stem (10) is arranged inside the shaft sleeve (11), and a connecting rod (2) is arranged at the bottom of the valve stem (10).

2. A two-way flow regulating valve according to claim 1, characterized in that: A connecting washer (17) is overlapped at the bottom and top of the other end of the connecting rod (2); a sliding sleeve (8) is arranged on the other side of the connecting washer (17); a spring washer (18) and a connecting pin (16) are arranged at the top and bottom of the sliding sleeve (8), respectively; a rocker arm (3) is fixedly connected to one side of the sliding sleeve (8); a hexagonal nut (19) is arranged at the top of the spring washer (18); and a cotter pin (20) is inserted at the top of the hexagonal nut (19).

3. A two-way flow regulating valve according to claim 1, characterized in that: An actuator (14) is arranged at the top of the valve stem (10), and a packing gland (13) is arranged at the bottom of one side of the actuator (14).

4. A two-way flow regulating valve as claimed in claim 2, characterized in that: A sleeve (7) is arranged at the bottom of the sliding sleeve (8), a sealing ring (6) is arranged at the bottom of the sleeve (7), a piston sealing plate (5) is arranged on one side of the sealing ring (6), and a right valve body (9) is arranged on the other side of the sealing ring (6).

5. A two-way flow regulating valve according to claim 1, characterized in that: A valve shaft O-ring (12) is arranged between the valve stem (10) and the top of the shaft sleeve (11).

6. A two-way flow regulating valve as claimed in claim 4, characterized in that: An O-type sealing ring (15) is provided at the bottom of one side of the piston sealing plate (5).

7. A two-way flow regulating valve according to claim 4, characterized in that: A pipeline is arranged on the other side of the sealing ring (6), and the other end of the pipeline is connected to the bottom of the right valve body (9).

8. A two-way flow regulating valve as claimed in claim 4, characterized in that: The piston sealing plate (5), the sealing ring (6) and the sleeve (7) are arranged symmetrically in the upper and lower parts.

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