Intelligent multi-functional shut-off valve and its control method

Abstract

This application discloses an intelligent control multi-functional shut-off valve and its control method. The shut-off valve includes a main valve body and a secondary valve body. The main valve body has a flow channel, and a main valve plate is installed in the flow channel. A main valve stem is eccentrically inserted through the main valve plate and connected to a drive mechanism. The secondary valve body is installed on the main valve body and is equipped with a reversing chamber, a discharge chamber, and a control chamber. The discharge chamber is connected to the flow channel through the reversing chamber. A diaphragm structure is installed in the control chamber to separate an upper chamber and a lower chamber. The upper chamber is connected to the liquid inlet end of the flow channel, and the lower chamber is connected to the liquid outlet end of the flow channel. The diaphragm structure is connected to the secondary valve stem, and the movement of the diaphragm structure drives the secondary valve stem to rise and fall. The secondary valve stem is connected to the secondary valve plate, which is installed in the reversing chamber to control the opening and closing of the discharge chamber and the flow channel. The control component acquires the rotation angle signal of the main valve stem and controls the drive mechanism to operate. The intelligent control multi-functional shut-off valve of this embodiment has a high degree of automation and can further reduce pump start-up water hammer and pump stop water hammer.

Description

Technical Field

[0001] This application relates to the field of pipeline control valve technology, and in particular to an intelligent control multifunctional shut-off valve and its control method. Background Technology

[0002] Currently, check valves installed at pump outlets for backflow prevention and water hammer reduction are primarily designed for water hammer during pump shutdown, with relatively little attention paid to water hammer during pump startup. However, in actual operation, water hammer during pump startup can lead to accidents such as expansion joint detachment and pipeline displacement.

[0003] To effectively reduce pump start-up water hammer, a patent application with application number 202211212640.X discloses a self-controlled intelligent multi-functional shut-off valve for pipelines. This valve can reduce pump start-up water hammer while also reducing pump shutdown water hammer. However, this solution has the problem of insufficient automation, which limits its effectiveness in reducing pump start-up and pump shutdown water hammer. Summary of the Invention

[0004] To address the aforementioned technical issues, this application proposes an intelligent control multi-functional shut-off valve with a high degree of automation, which can further reduce water hammer during pump start-up and pump shutdown.

[0005] This application also proposes a control method applicable to the above-mentioned intelligent multi-functional shut-off valve.

[0006] The intelligent control multi-functional shut-off valve of the first aspect of this application includes: The main valve body is equipped with a flow passage; A main valve plate is disposed within the flow channel. The main valve plate cooperates with the main valve body to control the opening and closing of the flow channel. The main valve stem is eccentrically inserted through the main valve plate and connected to a drive mechanism; A secondary valve body is installed on the main valve body; the secondary valve body is configured with a reversing chamber, a venting chamber and a control chamber, the venting chamber is disposed between the reversing chamber and the control chamber, and the venting chamber is connected to the flow passage through the reversing chamber; A diaphragm structure is installed in the control cavity to divide the control cavity into an upper chamber and a lower chamber. The upper chamber is connected to the liquid inlet end of the flow channel, and the lower chamber is connected to the liquid outlet end of the flow channel. A secondary valve stem is installed on the secondary valve body and connected to the diaphragm structure; the movement of the diaphragm structure drives the secondary valve stem to rise and fall. A secondary valve plate is installed in the reversing cavity and connected to the secondary valve stem. The raising and lowering of the secondary valve stem drives the raising and lowering of the secondary valve plate. The secondary valve plate cooperates with the secondary valve body to control the opening and closing of the venting cavity and the flow passage. The control component acquires the rotation angle signal of the main valve stem and controls the drive mechanism to operate.

[0007] In some embodiments of this application, the intelligent control multi-functional shut-off valve further includes a pressure relief pipe, which is connected to the upper chamber and is equipped with a solenoid valve. The control component acquires the rotation angle signal of the main valve stem and controls the solenoid valve to operate.

[0008] In some embodiments of this application, the pressure relief pipe is also equipped with a regulating valve.

[0009] In some embodiments of this application, the secondary valve body includes a secondary valve body and a diaphragm cover, the diaphragm cover being connected to the top end of the secondary valve body, and the control cavity being formed between the top end of the secondary valve body and the diaphragm cover; An elastic element is installed in the upper cavity, and the two ends of the elastic element abut against the diaphragm structure and the diaphragm cover, respectively.

[0010] In some embodiments of this application, a marker rod is connected to the top of the secondary valve stem, and the raising and lowering of the secondary valve stem drives the marker rod to rise and fall synchronously. The marker rod is movably and vertically installed inside the diaphragm cover, and the diaphragm cover is equipped with a position sensing mechanism. The position sensing mechanism indicates the position of the marker rod to monitor the position of the secondary valve rod.

[0011] In some embodiments of this application, the main valve body is equipped with a guide member, the guide member is provided with a second guide hole, and the second end of the auxiliary valve stem passes through the second guide hole.

[0012] The intelligent control multi-functional shut-off valve control method of the second aspect of this application is applicable to the above-mentioned intelligent control multi-functional shut-off valve, including: the control component controls the drive mechanism to drive the main valve stem to move through the reversing valve; The reversing valve has a first valve position, a second valve position, and a third valve position. When the reversing valve is in the first valve position, the driving mechanism drives the main valve stem to rotate forward, thereby causing the main valve plate to rotate in the valve opening direction. When the reversing valve is in the second valve position, the driving mechanism stops operating. When the reversing valve is in the third valve position, the driving mechanism drives the main valve stem to rotate in reverse, thereby causing the main valve plate to rotate in the valve closing direction.

[0013] When the valve is opened, water is supplied to the inlet end of the flow channel, which pushes the main valve plate to rotate in the valve opening direction and drives the main valve stem to rotate. The control component acquires the rotation angle signal of the main valve stem. When the rotation angle of the main valve stem is within a first set angle range, the control component controls the reversing valve to switch to the third valve position. When the rotation angle of the main valve stem is between the first set angle and the second set angle, the control component controls the reversing valve to switch to the second valve position; When the main valve stem rotates at an angle exceeding a second set angle, the control component controls the reversing valve to switch to the first valve position.

[0014] In some embodiments of this application, when the main valve stem rotates at an angle exceeding a second preset angle and reaches a maximum preset angle, the control component controls the reversing valve to switch to the second valve position.

[0015] In some embodiments of this application, when the valve is closed, the control component controls the reversing valve to switch to the third valve position.

[0016] In some embodiments of this application, the intelligent control multi-functional shut-off valve further includes a pressure relief pipe, which is connected to the upper chamber and is equipped with a solenoid valve. When the valve is closed, the main valve plate rotates to engage with the main valve body to close the flow passage, and the control component controls the solenoid valve to open.

[0017] The intelligent control multi-functional shut-off valve and its control method according to the embodiments of this application have at least the following beneficial effects: By adding a drive mechanism and control components, the control components can control the drive mechanism to apply a closing force to the main valve plate through the main valve stem when the valve is opened, thereby reducing or avoiding pump start-up water hammer and avoiding motor overload caused by excessive flow. At the same time, the control components can control the drive mechanism to assist the main valve plate to open to the maximum preset angle, avoiding main valve plate vibration and improving the service life of the equipment. The control components can also control the drive mechanism to assist the main valve plate to close quickly when the valve is closed, and reduce pump stop water hammer through the secondary valve body, effectively improving the service life of the equipment. The control components control the drive mechanism through a reversing valve, which has a simple structure, high degree of automation, and can achieve more precise control of the main valve plate, further reducing pump start-up and pump stop water hammer while also adjusting the opening degree of the main valve plate according to flow requirements.

[0018] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0019] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a cross-sectional view of the intelligent multi-functional shut-off valve according to an embodiment of this application in the first direction; Figure 2 This is a cross-sectional view of the main valve plate of the intelligent multi-functional shut-off valve in the embodiment of this application when the valve is in the closed position; Figure 3This is a cross-sectional view of the main valve stem of the intelligent multi-functional shut-off valve in this embodiment of the application when the rotation angle is at the first set angle position; Figure 4 This is a cross-sectional view of the main valve plate of the intelligent multi-functional shut-off valve in the embodiment of this application when it is in the maximum preset angle position; Figure 5 This is a cross-sectional view of the main valve plate of the intelligent control multi-functional shut-off valve in the embodiment of this application when it switches to the valve-off position; Figure 6 for Figure 1 Schematic diagram of the drive mechanism and directional valve; Figure 7 for Figure 1 Enlarged view of point A in the middle; Figure 8 for Figure 1 Enlarged view of point B in the middle.

[0020] Icon labels: Main valve body 100, flow passage 110, main valve plate 111, main valve stem 112, liquid inlet end 113, liquid outlet end 114, guide component 120, second guide hole 121; Sub-valve body 200, reversing chamber 210, first guide hole 211, venting chamber 220, control chamber 230, diaphragm structure 231, upper chamber 232, lower chamber 233, elastic element 234, sub-valve stem 240, sub-valve plate 241, marking rod 242, diaphragm cover 250, sub-valve body 260, position sensing mechanism 270; Pressure relief pipe 300, solenoid valve 310, regulating valve 320; Drive mechanism 400; Directional control valve 500, first valve position 501, second valve position 502, third valve position 503, angle sensor 510. Detailed Implementation

[0021] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0022] In the description of this application, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0023] In the description of this application, "multiple" refers to two or more. The use of "first" and "second" is for the purpose of distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or the order in which the technical features are indicated.

[0024] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. The embodiments of this application may omit unnecessary detailed descriptions. For example, detailed descriptions of well-known matters and repeated descriptions of actually identical structures may be omitted. This is to avoid making the following description unnecessarily lengthy and to facilitate understanding by those skilled in the art.

[0026] In this application, the technical features described in an open-ended manner include both closed technical solutions consisting of the listed features and open technical solutions that include the listed features.

[0027] Reference Figures 1 to 8 As shown, this application discloses in detail an intelligent control multi-functional shut-off valve, which mainly includes two parts: a main valve body 100 and a secondary valve body 200. The secondary valve body 200 is securely installed on the main valve body 100, and the two work together to achieve precise control of the fluid passage.

[0028] Specifically, refer to Figure 1 , Figure 2 As shown, the main valve body 100 has a flow passage 110 inside, and the flow passage 110 is equipped with a main valve seat. At the same time, a main valve plate 111 is installed in the flow passage 110. The main valve plate 111 can be tightly fitted with the main valve seat to realize the on-off control of the flow passage 110.

[0029] It should be noted that the main valve plate 111 is arranged at an angle within the flow channel 110. When the main valve plate 111 is in a state of... Figure 2 When the position is shown, the main valve plate 111 forms a sealed connection with the main valve seat in the flow channel 110, thereby completely isolating the liquid inlet end 113 and the liquid outlet end 114 of the flow channel 110, thus achieving the cut-off of the flow channel 110.

[0030] by Figure 2 As a reference example, the main valve plate 111 can rotate clockwise to open the valve and counterclockwise to close the valve. When the main valve plate 111 is in... Figure 2 At the position shown, the medium pressure remaining in the outlet pipe system 114 can exert a counterclockwise rotation force on the main valve plate 111 to cause the valve to close, ensuring that the main valve plate 111 and the main valve seat can maintain a reliable sealing connection.

[0031] The main valve body 100 is also equipped with a main valve stem 112 that can rotate around its own axis. The main valve stem 112 passes through the main valve plate 111 and is connected to it by means of transmission, such as by key connection or fastener connection. At the same time, the main valve stem 112 is also connected to a drive mechanism 400. The drive mechanism 400 can drive the main valve stem 112 to rotate around its axis, thereby driving the main valve plate 111 connected to it to rotate, thereby assisting in realizing the opening or closing operation of the valve.

[0032] It is worth noting that, such as Figure 1 and Figure 2 As shown, the main valve stem 112 is eccentrically mounted through the main valve plate 111. This design results in the following effect: when the main valve plate 111 is in... Figure 3 or Figure 4 When the main valve plate 111 is in the position shown, if it is not subjected to external driving force, the main valve plate 111 can automatically rotate in the direction of closing the valve under the influence of its own gravity.

[0033] In some specific embodiments provided in this application, such as Figure 1 As shown, the drive mechanism 400 can be flexibly selected from any one of the hydraulic drive mechanism 400, pneumatic drive mechanism 400, or electric drive mechanism 400 according to actual application requirements; this embodiment does not limit this. The drive mechanism 400 can drive the main valve stem 112 to rotate in either the forward or reverse direction. For example, the drive mechanism 400 can drive the main valve stem 112 to rotate forward, thereby causing the main valve plate 111 to rotate in the direction of opening the valve; conversely, when the drive mechanism 400 drives the main valve stem 112 to rotate in the reverse direction, it will cause the main valve plate 111 to rotate in the direction of closing the valve.

[0034] In some embodiments of this application, reference is made to Figure 6 As shown, the main valve stem 112 can be equipped with an angle sensor 510 for accurately detecting the real-time rotation angle of the main valve stem 112.

[0035] In some embodiments of this application, the drive mechanism 400 is controlled by a reversing valve 500. For example... Figure 6As shown, the directional valve 500 is designed with three different working positions: a first valve position 501, a second valve position 502, and a third valve position 503. When the directional valve 500 is in the first valve position 501, the drive mechanism 400 drives the main valve stem 112 to rotate forward, causing the main valve plate 111 to rotate in the opening direction. When the directional valve 500 is in the second valve position 502, the drive mechanism 400 stops operating, and the main valve stem 112 remains stationary. When the directional valve 500 is in the third valve position 503, the drive mechanism 400 drives the main valve stem 112 to rotate in reverse, thereby causing the main valve plate 111 to rotate in the closing direction.

[0036] In some embodiments of this application, reference is made to Figure 1 , Figure 2 and Figure 7 As shown, the secondary valve body 200 includes a secondary valve body 260 and a diaphragm cover 250, with the diaphragm cover 250 connected to the top of the secondary valve body 260. The secondary valve body 200 internally comprises a reversing chamber 210, a drain chamber 220, and a control chamber 230. The drain chamber 220 is located between the reversing chamber 210 and the control chamber 230, and is connected to the flow passage 110 of the main valve body 100 via the reversing chamber 210. The control chamber 230 is formed between the top of the secondary valve body 260 and the diaphragm cover 250. A diaphragm structure 231 is installed within the control chamber 230, dividing it into two independent spaces: an upper chamber 232 and a lower chamber 233. The upper chamber 232 is connected to the inlet end 113 of the flow passage 110, and the lower chamber 233 is connected to the outlet end 114 of the flow passage 110. Changes in the internal volume of the upper chamber 232 and the lower chamber 233 can cause the diaphragm structure 231 to rise or fall.

[0037] In some embodiments of this application, reference is made to Figures 2 to 5 As shown, the secondary valve body 200 is provided with a first guide hole 251, which is formed between the control chamber 230 and the discharge chamber 220. The secondary valve body 200 is also equipped with a secondary valve stem 240, which passes through the first guide hole 251. The first guide hole 251 guides the lifting and lowering movement of the secondary valve stem 240, ensuring the stability of its trajectory.

[0038] Furthermore, the upper part of the secondary valve stem 240 is connected to the diaphragm structure 231. The movement of the diaphragm structure 231 can directly drive the secondary valve stem 240 to move up and down relative to the secondary valve body 200. A secondary valve plate 241 is installed on the secondary valve stem 240 and is disposed in the reversing cavity 210. The up and down movement of the secondary valve stem 240 will synchronously drive the secondary valve plate 241 to move up and down within the reversing cavity 210.

[0039] Reference Figure 8As shown, the reversing chamber 210 is designed with an inlet end and an outlet end. The inlet end is connected to the flow passage 110, and the outlet end is connected to the drain chamber 220. The drain chamber 220 is ultimately connected to the atmospheric environment or the low-pressure area of ​​the water pump inlet. The auxiliary valve plate 241 can form a sealed connection with the inlet end or the outlet end of the reversing chamber 210.

[0040] Specifically, such as Figure 8 As shown, when the secondary valve stem 240 drives the secondary valve plate 241 to descend until it contacts the inlet end of the reversing chamber 210, the secondary valve plate 241 forms a sealed connection with the inlet end, thereby cutting off the communication between the flow passage 110 and the reversing chamber 210, and indirectly cutting off the communication between the flow passage 110 and the drain chamber 220. Conversely, when the secondary valve stem 240 drives the secondary valve plate 241 to rise until it contacts the outlet end of the reversing chamber 210, the secondary valve plate 241 forms a sealed connection with the outlet end, thereby cutting off the communication between the reversing chamber 210 and the drain chamber 220, and similarly indirectly cutting off the communication between the flow passage 110 and the drain chamber 220.

[0041] In some embodiments of this application, such as Figure 7 As shown, an elastic element 234 is installed in the upper chamber 232, and the two ends of the elastic element 234 abut against the inner walls of the diaphragm structure 231 and the diaphragm cover 250, respectively. Specifically, the elastic element 234 is preferably a spring, which can apply a downward force to the diaphragm structure 231, thereby assisting in pushing the secondary valve stem 240 downward.

[0042] In some embodiments of this application, reference is made to Figure 7 As shown, an indicator rod 242 is connected to the top of the secondary valve stem 240. The indicator rod 242 is coaxially arranged with the secondary valve stem 240. The raising and lowering of the secondary valve stem 240 drives the indicator rod 242 to rise and fall synchronously. The indicator rod 242 is movably mounted inside the diaphragm cover 250. A position sensing mechanism 270 is installed on the top of the diaphragm cover 250. The position sensing mechanism 270 senses the position of the indicator rod 242 to achieve real-time monitoring of the position of the secondary valve stem 240, thereby facilitating the operator to determine whether the secondary valve plate 241 has reached the contact position with the inlet or outlet end of the reversing chamber 210. The position sensing mechanism 270 can be a displacement sensor, proximity switch, or other devices, and is not limited in this embodiment.

[0043] In some embodiments of this application, such as Figure 8As shown, a guide member 120 is also installed on the main valve body 100. The guide member 120 has a second guide hole 121, the size of which matches the secondary valve stem 240. The bottom end of the secondary valve stem 240 passes precisely into the second guide hole 121. The guide member 120 can also be used to provide precise and stable linear guidance for the lifting and lowering movement of the secondary valve stem 240, limiting the radial offset or sway that the secondary valve stem 240 may produce during the movement, thereby ensuring that the running trajectory of the secondary valve stem 240 and even the entire valve body under the drive of the actuator is accurate.

[0044] In some embodiments of this application, the intelligent control multi-functional shut-off valve also includes a pressure relief pipe 300. One end of the pressure relief pipe 300 is connected to the upper chamber 232 of the valve, and the other end is connected to the external environment or a designated pressure relief area. A solenoid valve 310 and a regulating valve 320 are sequentially installed on the pressure relief pipe 300. The solenoid valve 310, as a fast-acting switching element, can quickly and accurately control the on / off state of the pressure relief pipe 300 according to the control signal. The regulating valve 320, as a fine-tuning element, is used to precisely control the flow opening of the pressure relief pipe 300 in the open state, thereby realizing stepless or graded adjustment of the discharge speed of the medium passing through the pressure relief pipe 300 to meet the pressure relief requirements under different working conditions. When the solenoid valve 310 receives an opening command, the pressure relief pipe 300 is connected, and the internal space of the upper chamber 232 can be directly connected to the external atmospheric environment or low-pressure area through the pressure relief pipe 300, providing a controllable release path for the medium pressure in the upper chamber 232.

[0045] In some embodiments of this application, the intelligent multi-functional shut-off valve further includes a control component, which has signal acquisition and logic processing capabilities. For example... Figure 6 As shown, on the one hand, the control component acquires and processes the rotation angle signal of the main valve stem 112 collected by the angle sensor 510, and drives the directional valve 500 to precisely switch between its working first valve position 501, second valve position 502, and third valve position 503 based on this angle signal. On the other hand, the control component can also integrate the real-time rotation angle signal of the main valve stem 112 and the precise position signal of the auxiliary valve stem 240 collected by the position sensing mechanism 270 to control the solenoid valve 310 to perform corresponding opening or closing actions, thereby realizing active and intelligent control of the on / off state of the pressure relief pipe 300.

[0046] The following will describe in detail the specific working process of the intelligent multi-functional shut-off valve and its corresponding control method according to the embodiments of this application: Step 1, Initial Valve Closure and Preset State: In the initial state, the main valve plate 111 is in the position shown in the attached... Figure 2The diagram shows the fully closed position. At this time, the drive pump has not yet started, and there is basically no medium pressure at the inlet end 113 of the flow channel 110. Since the upper chamber 232 is connected to the inlet end 113 through the internal flow channel, the pressure inside the upper chamber 232 is also at a low level. At the same time, the pipeline connected to the outlet end 114 may contain previously delivered or pre-filled medium, which has a certain static pressure. Since the lower chamber 233 is connected to the outlet end 114, the medium pressure in the lower chamber 233 will be higher than the pressure in the upper chamber 232. Under the action of this pressure difference, the flexible diaphragm structure 231 will be subjected to an upward force, thereby driving the auxiliary valve stem 240 rigidly connected to it and the auxiliary valve plate 241 fixed on the auxiliary valve stem 240 to move upward together. Although an elastic element 234 is provided in the upper chamber 232, this elastic element 234 is designed to have a low elastic coefficient. Therefore, the elastic force provided by the elastic element 234 is insufficient to overcome the pressure difference between the upper chamber 232 and the lower chamber 233 under this operating condition. As a result, the auxiliary valve stem 240 and the auxiliary valve plate 241 will continue to move upward until the sealing surface of the auxiliary valve plate 241 forms a tight sealing connection with the outlet end of the reversing chamber 210. At this time, the passage between the reversing chamber 210 and the venting chamber 220 is completely blocked, no medium is discharged from the venting chamber 220, and the entire valve is in a closed standby state.

[0047] In this initial stage, the directional valve 500 is preset or controlled to be in the second valve position 502. The main valve plate 111, under its own weight, tends to rotate in the closing direction; on the other hand, the pressure of the residual medium in the outlet pipe system 114 also exerts an additional force on the main valve plate 111 in the closing direction. Under the combined action of these two forces, the main valve plate 111 is stably maintained in the closed position.

[0048] Step 2, Pump Start-up and Controllable Opening Process: After the pump starts, the medium pressure at the inlet end 113 of the flow channel 110 begins to rise rapidly. As the pressure is transmitted, the pressure in the upper chamber 232 also increases. When the combined force of the increasing pressure in the upper chamber 232 and the downward elastic force provided by the elastic element 234 eventually exceeds the medium pressure in the lower chamber 233, the combined force acting on the diaphragm structure 231 becomes downward, and the diaphragm structure 231 begins to move downward, thereby driving the auxiliary valve stem 240 and the auxiliary valve plate 241 to move downward together. The auxiliary valve plate 241 gradually disengages from the sealing connection with the outlet end of the reversing chamber 210, connecting the reversing chamber 210 with the discharge chamber 220, allowing the medium in the flow channel 110 to flow into the discharge chamber 220 through the reversing chamber 210.

[0049] After the flow passage 110 is connected to the discharge chamber 220 through the reversing chamber 210, a portion of the medium at the outlet 114 is diverted to the discharge chamber 220 for discharge, preventing abnormal pressure increases in the medium at the outlet 114. The pressure relief process at the outlet 114 effectively buffers and reduces the severe pressure fluctuations that may occur at the moment of pump startup, thus reducing the so-called "pump start-up water hammer" and protecting the pipeline system.

[0050] Simultaneously, due to the pressure leakage at the outlet 114, the force exerted by the medium remaining in the outlet 114 piping system on the main valve plate 111 in the closing direction also weakens. When the force generated by the continuously rising medium pressure at the inlet 113 exceeds the resultant force of the main valve plate 111's own weight and the force exerted by the medium remaining at the outlet 114, the main valve plate 111 begins to overcome resistance and rotate in the opening direction. Specifically, the main valve plate 111 moves from the attached... Figure 2 The indicated closed position is gradually rotated to the attached position. Figure 3 In the open position shown, the flow channel 110 is opened, allowing the medium to pass through smoothly.

[0051] During the startup and opening phases, the control component plays a crucial regulatory role. The control component first controls the directional valve 500 to switch to the third operating position, and then switches it to the second operating position. The specific control logic is as follows: If, after the water pump starts, the pressure rises too quickly or other factors cause the main valve plate 111 to rotate too rapidly in the opening direction, it may cause a sharp increase in pump flow rate within a very short time. This flow surge can easily cause the water pump to trip due to overload, and may even damage the water pump or related equipment.

[0052] To prevent such risks, when the control component detects that the rotation angle of the main valve stem 112 falls within the preset first set angle range, the control component controls the directional valve 500 to switch to the third valve position 503, so that the drive mechanism 400 applies an additional torque or force to the main valve plate 111 through the main valve stem 112, rotating in the direction of closing the valve. This additional resistance torque is intended to actively suppress the opening speed of the main valve plate 111, thereby avoiding the valve from causing a large pressure shock in the pipeline due to rapid opening, and effectively protecting downstream pipelines and equipment from damage.

[0053] As the pressure at the inlet 113 further stabilizes and the main valve plate 111 continues to open slowly, when the rotation angle of the main valve stem 112 increases and enters the range between the first set angle and a larger second set angle, the control component determines that the initial impact risk has been reduced and controls the directional valve 500 to switch back to the second working position. When the directional valve 500 is in the second valve position 502, the additional intervention of the drive mechanism 400 on the main valve plate 111 is released, and the main valve plate 111 then mainly adjusts and maintains its opening based on the real-time pressure difference between the inlet 113 and the outlet 114, realizing a pressure feedback-type balance regulation.

[0054] It should be noted that the value of the second set angle is greater than that of the first set angle; and when the rotation angle of the main valve stem 112 exceeds the first set angle for the first time, and the directional valve 500 has switched from the third valve position 503 to the second valve position 502, as long as the water pump is still running, even if the rotation angle of the main valve stem 112 temporarily drops back due to fluctuations in operating conditions and re-enters the first set angle range, the control component will determine that the system has passed the most sensitive start-up phase, so that the directional valve 500 will remain in the second valve position 502 and will not switch back to the third valve position 503, so as to ensure the smooth operation of the valve.

[0055] Step 3, Stable Operation and Optimized Control Stage: After the water pump has been running for a period of time, the flow and pressure of the entire pipeline system gradually become stable, the pressure fluctuation at the inlet 113 is significantly reduced, the auxiliary valve stem 240 drives the auxiliary valve plate 241 to descend slowly until the auxiliary valve plate 241 descends to the position where it forms a sealed connection with the inlet of the reversing chamber 210, thereby cutting off the connection between the reversing chamber 210 and the upstream flow channel 110, and the discharge chamber 220 no longer discharges any medium, and the valve enters the full flow state.

[0056] During this stable operation phase, when the directional valve 500 is in the second valve position 502, the main valve plate 111 will theoretically automatically fine-tune its opening according to the pressure difference between the inlet end 113 and the outlet end 114 to maintain balance. However, in actual operation, the medium pressure in the flow channel 110 may fluctuate slightly, which will cause the main valve plate 111 to produce unnecessary slight shaking or oscillation. This continuous shaking will not only accelerate the wear of key components such as the main valve plate 111 shaft bearing and sealing ring, shortening their service life, but also, since the main valve plate 111's own weight is always acting as part of the load on the flowing medium, it will also additionally increase the valve's water loss and reduce the system's energy efficiency.

[0057] To optimize operation, when the control component detects that the rotation angle of the main valve stem 112 exceeds the second preset angle, the control component drives the reversing valve 500 to switch from the second valve position 502 to the first valve position 501. This causes the drive mechanism 400 to rotate the main valve plate 111 in the direction of opening the valve via the main valve stem 112, until the main valve plate 111 rotates to the maximum preset angle position, that is, the main valve plate 111 reaches... Figure 4 The state shown in the figure. In this state, the cross-sectional area of ​​the flow passage 110 that allows the medium to flow reaches its maximum value, and the main valve plate 111 is approximately parallel to the flow direction of the medium, thereby minimizing the water loss during the flow process.

[0058] After the main valve plate 111 rotates to the maximum preset angle, the control component controls the reversing valve 500 to switch to the second valve position 502 to ensure that the main valve plate 111 can be stably maintained in the current position.

[0059] Step four, pump shutdown stage: When the water pump stops running, the pressure at the inlet 113 disappears, the pressure in the upper chamber 232 decreases accordingly, while the pressure in the lower chamber 233 increases accordingly. (Refer to...) Figure 5 As shown, the diaphragm structure 231 will move upward, causing the auxiliary valve stem 240 and the auxiliary valve plate 241 to rise together. The auxiliary valve plate 241 will disengage from the sealed connection with the inlet end of the reversing chamber 210, allowing the flow passage 110 to connect with the pressure relief chamber through the reversing chamber 210, thereby effectively avoiding the valve-closing water hammer phenomenon that may occur when the pump stops.

[0060] At the same time, the control component switches the reversing valve 500 to the third valve position 503, so that the drive mechanism 400 applies a rotational torque to the main valve plate 111 in the direction of closing the valve through the main valve stem 112. This force, together with the gravity of the main valve plate 111 itself and the external force applied to the main valve plate 111 by the liquid outlet 114, jointly promotes the main valve plate 111 to close quickly.

[0061] To further improve the valve closing speed and reduce the impact of water hammer during pump shutdown, the control assembly simultaneously activates solenoid valve 310 after the pump stops, allowing the upper chamber 232 to quickly release pressure through the inlet end 113 and the pressure relief pipe 300. The regulating valve 320 can adjust the opening of the pressure relief pipe 300 according to actual operating conditions, thereby precisely controlling the pressure relief rate of the upper chamber 232 during valve closing.

[0062] Step 5: After the water pump stops, the auxiliary valve stem 240 and the auxiliary valve plate 241 continue to move upward until the auxiliary valve plate 241 forms a sealed connection with the outlet end of the reversing chamber 210. The reversing chamber 210 and the discharge chamber 220 are no longer connected, and no medium is discharged from the discharge chamber 220. The main valve plate 111 then switches to... Figure 2The position shown is the one where the valve is sealed to the main valve seat. After the control component receives the signal that the main valve stem 112 has rotated back to its initial angle and the position sensing mechanism 270 detects the signal that the auxiliary valve stem 240 has risen to the end of its stroke, the control component controls the directional valve 500 to switch back to the second valve position 502 and simultaneously closes the solenoid valve 310.

[0063] In some embodiments of this application, the first and second preset angles can be specifically set according to actual conditions, and are not limited in this embodiment. For example, the first angle can be set to 30 degrees and the second preset angle can be set to 50 degrees.

[0064] In summary, the intelligent multi-functional shut-off valve and its control method provided in this application, by adding a drive mechanism 400 and a control component, enable the control component to control the drive mechanism 400 to apply a force towards the closing direction to the main valve plate 111 via the main valve stem 112 when the valve is opened, thereby effectively reducing or avoiding the occurrence of pump start-up water hammer. Simultaneously, the control component can also control the drive mechanism 400 to assist the main valve plate 111 in opening to the maximum preset angle, preventing the main valve plate 111 from vibrating during operation and extending the service life of the equipment. During pump operation, if it is necessary to adjust the water supply flow, the drive mechanism 400 can also be controlled to apply a force towards the closing direction to the main valve plate 111 via the main valve stem 112, and the opening degree of the main valve plate 111 can be fed back in real time by the angle sensor 510, achieving a more precise flow regulation function. Furthermore, when closing the valve, the control component can control the drive mechanism 400 to assist the main valve plate 111 in quickly closing to prevent pump reversal, and, combined with the structure of the secondary valve body 200, reduce pump stop water hammer, thereby significantly improving the overall durability of the equipment. The control component operates the drive mechanism 400 through the reversing valve 500. It has a simple structure and a high degree of automation, and can achieve more precise control of the main valve plate 111, further reducing the impact of pump start-up water hammer and pump stop water hammer on the equipment.

[0065] Throughout this specification, references to "implementation method," "partial implementation method," "one implementation method," "another method," "specific method," or "partial method" mean that at least one implementation method or embodiment in this application includes the specific features, structures, materials, or characteristics described in that implementation method or embodiment.

[0066] In this application, numerical ranges are involved. Unless otherwise specified, the numerical ranges mentioned above are considered continuous and include the minimum and maximum values ​​of the range, as well as every value between the minimum and maximum values. Any lower limit can be combined with any upper limit to form an unspecified range; and any lower limit can be combined with other lower limits to form an unspecified range, just as any upper limit can be combined with any other upper limit to form an unspecified range. Furthermore, each individually disclosed point or single value can itself serve as a lower or upper limit and be combined with any other point or single value or with other lower or upper limits to form an unspecified range.

[0067] Although illustrative embodiments have been demonstrated and described, those skilled in the art should understand that the above embodiments should not be construed as limiting the present application, and that changes, substitutions and modifications can be made to the embodiments without departing from the spirit, principles and scope of the present application.

Claims

1. A smart control multi-functional shut-off valve, characterized in that, include: The main valve body is equipped with a flow passage; A main valve plate is disposed within the flow channel. The main valve plate cooperates with the main valve body to control the opening and closing of the flow channel. The main valve stem is eccentrically inserted through the main valve plate and connected to a drive mechanism; A secondary valve body is installed on the main valve body; the secondary valve body is configured with a reversing chamber, a venting chamber and a control chamber, the venting chamber is disposed between the reversing chamber and the control chamber, and the venting chamber is connected to the flow passage through the reversing chamber; A diaphragm structure is installed in the control cavity to divide the control cavity into an upper chamber and a lower chamber. The upper chamber is connected to the liquid inlet end of the flow channel, and the lower chamber is connected to the liquid outlet end of the flow channel. A secondary valve stem is installed on the secondary valve body and connected to the diaphragm structure; the movement of the diaphragm structure drives the secondary valve stem to rise and fall. A secondary valve plate is installed in the reversing cavity and connected to the secondary valve stem. The raising and lowering of the secondary valve stem drives the raising and lowering of the secondary valve plate. The secondary valve plate cooperates with the secondary valve body to control the opening and closing of the venting cavity and the flow passage. The control component acquires the rotation angle signal of the main valve stem and controls the drive mechanism to operate.

2. The intelligent control multi-functional shut-off valve according to claim 1, characterized in that, The intelligent control multi-functional shut-off valve also includes a pressure relief pipe, which is connected to the upper chamber and is equipped with a solenoid valve. The control component acquires the rotation angle signal of the main valve stem and controls the solenoid valve to operate.

3. The intelligent control multi-functional shut-off valve according to claim 2, characterized in that, The pressure relief pipe is also equipped with a regulating valve.

4. The intelligent control multi-functional shut-off valve according to claim 1, characterized in that, The secondary valve body includes a secondary valve body and a diaphragm cover, the diaphragm cover being connected to the top end of the secondary valve body, and the control cavity being formed between the top end of the secondary valve body and the diaphragm cover; An elastic element is installed in the upper cavity, and the two ends of the elastic element abut against the diaphragm structure and the diaphragm cover, respectively.

5. The intelligent control multi-functional shut-off valve according to claim 4, characterized in that, The top of the secondary valve stem is connected to an indicator rod, and the raising and lowering of the secondary valve stem drives the indicator rod to rise and fall synchronously. The marker rod is movably and vertically installed inside the diaphragm cover, and the diaphragm cover is equipped with a position sensing mechanism. The position sensing mechanism indicates the position of the marker rod to monitor the position of the secondary valve rod.

6. The intelligent control multi-functional shut-off valve according to claim 1, characterized in that, The main valve body is equipped with a guide member, the guide member is provided with a second guide hole, and the second end of the auxiliary valve stem passes through the second guide hole.

7. A control method for an intelligent multi-functional shut-off valve, applicable to the intelligent multi-functional shut-off valve as described in any one of claims 1 to 6; characterized in that, The control component controls the drive mechanism to drive the main valve stem through a reversing valve; The reversing valve has a first valve position, a second valve position, and a third valve position. When the reversing valve is in the first valve position, the driving mechanism drives the main valve stem to rotate forward, thereby causing the main valve plate to rotate in the valve opening direction. When the reversing valve is in the second valve position, the driving mechanism stops operating. When the reversing valve is in the third valve position, the driving mechanism drives the main valve stem to rotate in reverse, thereby causing the main valve plate to rotate in the valve closing direction. When the valve is opened, water is supplied to the inlet end of the flow channel, which pushes the main valve plate to rotate in the valve opening direction and drives the main valve stem to rotate. The control component acquires the rotation angle signal of the main valve stem. When the rotation angle of the main valve stem is within a first set angle range, the control component controls the reversing valve to switch to the third valve position. When the rotation angle of the main valve stem is between the first set angle and the second set angle, the control component controls the reversing valve to switch to the second valve position; When the main valve stem rotates at an angle exceeding a second set angle, the control component controls the reversing valve to switch to the first valve position.

8. The intelligent control multi-functional shut-off valve control method according to claim 7, characterized in that, When the main valve stem rotates at an angle exceeding the second preset angle and reaches the maximum preset angle, the control component controls the reversing valve to switch to the second valve position.

9. The intelligent control multi-functional shut-off valve control method according to claim 7, characterized in that, When the valve is closed, the control component controls the reversing valve to switch to the third valve position.

10. The intelligent control multi-functional shut-off valve control method according to claim 7, characterized in that, The intelligent control multi-functional shut-off valve also includes a pressure relief pipe, which is connected to the upper chamber and is equipped with a solenoid valve. When the valve is closed, the main valve plate rotates to engage with the main valve body to close the flow passage, and the control component controls the solenoid valve to open.

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