An intelligent leak-proof water supply valve

Abstract

The present invention relates to the field of valves, and is an intelligent anti-leakage water supply valve, comprising a valve body, provided with a fluid medium inlet and a fluid medium outlet, a medium channel formed between the fluid medium inlet and the fluid medium outlet; a one-way valve assembly, placed in the medium channel downstream of the valve core assembly, automatically adjusting its opening angle according to the medium pressure upstream and downstream thereof; a flow sensor, placed in the medium channel downstream of the valve core assembly, for detecting the flow parameter of the fluid; the flow sensor comprises an impeller, the wheel center of the impeller is eccentrically arranged with the center line of the medium channel; the one-way valve assembly, in the open state, guides the fluid obliquely to the outer edge of the impeller blades. The intelligent anti-leakage water supply valve can automatically adjust the effective pipe diameter of the medium channel, thereby concentrating the medium flow to the outer edge of the impeller blades, and can accurately measure even at a small flow rate, with high accuracy.

Description

Technical Field

[0001] The invention relates to the field of valves, and in particular to an intelligent leak-proof water-supplying valve. Background Art

[0002] The valve is a control component in the fluid delivery system, which has the functions of cutoff, regulation, diversion, backflow prevention, pressure stabilization, diversion or overflow pressure relief. At present, the flow measurement method in the valve is the impeller or turbine flow measurement, which relies on the power of the fluid or gas to drive the impeller or turbine to rotate, thereby generating changes in the electrical signal for measurement. In order to have enough power to drive the rotation of the impeller or turbine at a small flow rate, the measuring device will add a baffle in front of the impeller or turbine so that the limited power of the fluid acts on its edge to drive its rotation. The position of the baffle can usually only be fixed at a certain point. When the baffle area is large, it can better measure small flow data, but it will generate great resistance at large flow. When the baffle area is small, the resistance is small, but it cannot measure small flow data well.

[0003] In addition, the pressure measurement in the existing valve is to set a pressure hole on the pipe shell, and measure the pressure of the fluid or gas through the pressure hole. This pressure measurement method has two necessary conditions: 1. The pipe fluid is full; 2. The fluid or gas before and after the pressure point is non-turbulent. Therefore, the measurement accuracy of low-pressure (power) fluids and fluids or gases with large turbulence is obviously not up to the expected value. Summary of the invention

[0004] In order to solve the above problems, the purpose of the present invention is to provide an intelligent leak-proof water-supplying valve, which can automatically adjust the effective pipe diameter of the medium channel, thereby concentrating the medium flow to the outer edge of the impeller blades, and can accurately measure even at a small flow rate with high accuracy.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0006] An intelligent leak-proof water supply valve, characterized in that: it comprises a valve body, provided with a fluid medium inlet and a fluid medium outlet, and a medium channel is formed between the fluid medium inlet and the fluid medium outlet;

[0007] The one-way valve assembly is placed in the medium channel downstream of the valve core assembly and automatically adjusts its opening angle according to the medium pressure upstream and downstream thereof;

[0008] A flow sensor is placed in the medium channel downstream of the valve core assembly and is used to detect the flow parameters of the fluid; the flow sensor includes an impeller, the center of the impeller is eccentrically arranged with respect to the center line of the medium channel; when the one-way valve assembly is in an open state, the fluid is obliquely guided to the outer edge of the impeller blade.

[0009] Preferably, the one-way valve assembly includes a one-way valve disc and a torsion spring, and a one-way valve port is provided inside the valve body; one end of the one-way valve disc is hinged on one side of the one-way valve port, and the torsion spring is arranged on the hinged end of the one-way valve disc; the force of the torsion spring on the one-way valve disc drives the one-way valve disc to close the one-way valve port. In the above technical scheme, the one-way valve disc is driven by the torsion spring, but the elasticity of the torsion spring is relatively small, so under the condition of fluid pressure difference at the one-way valve port, the fluid will act on the one-way valve disc, thereby automatically adjusting the opening; when the fluid pressure downstream of the one-way valve port is less than or equal to the fluid pressure upstream of the one-way valve port, the one-way valve disc is driven by the power of the fluid to rotate and open. When the fluid pressure downstream of the one-way valve port is greater than or equal to the fluid pressure upstream of the one-way valve port, the reverse pressure of the fluid or the elastic force of the torsion spring will drive the one-way valve disc to close the one-way valve port; thereby preventing the fluid from flowing back and limiting the medium to flow in only one direction.

[0010] Preferably, the maximum opening angle of the one-way valve is 75°.

[0011] Preferably, a flow chamber is provided inside the valve body downstream of the one-way valve port, and the impeller is rotatably disposed in the flow chamber.

[0012] Preferably, a pressure sensor is also included, which is placed in the medium channel downstream of the valve core assembly and is used to detect fluid pressure parameters, which can characterize the medium characteristics in the closed circulation system. In this technical solution, the fluid pressure parameter detected by the pressure sensor is the fluid pressure; when the fluid pressure is at a normal pressure value, it means that the closed circulation system is in a normal working state; and when the fluid pressure value decreases rapidly, it means that the closed circulation system is in a water leakage state; and when the fluid pressure value drops slightly frequently and multiple times, it means that the closed circulation system is in a micro-leakage state.

[0013] Preferably, the pressure point of the pressure sensor is arranged in the non-turbulent area on the downstream side of the valve core assembly and the one-way valve; further, the pressure point of the pressure sensor is within the opening inner diameter of the one-way valve. In this solution, when the one-way valve is in a closed state, the pressure point of the pressure sensor is in a closed circulation system, and the pressure of the fluid medium in the closed circulation system can be monitored; and when the one-way valve is in an open state, the pressure point of the pressure sensor is in the guiding area of ​​the one-way valve for the medium, and the performance parameters of the fluid medium can be accurately monitored in real time.

[0014] The present invention adopts the above-mentioned technical solution, which relates to an intelligent leak-proof water supply valve. The one-way valve component in the intelligent leak-proof water supply valve can automatically adjust its opening angle according to the medium pressure upstream and downstream thereof. Specifically, under the condition of the fluid pressure difference at the valve port of the one-way valve, the fluid will act on the one-way valve plate, thereby automatically adjusting the opening. The one-way valve plate has a guiding effect on the fluid in the open state, so that the fluid is focused on one side of the medium channel, and at the same time guides it to flow to the outer edge of the impeller blades, thereby increasing the power to drive the impeller to rotate. Therefore, the intelligent leak-proof water supply valve in this solution can automatically adjust the effective pipe diameter of the medium channel, thereby concentrating the medium flow to the outer edge of the impeller blades, and can accurately measure even at a small flow rate with high accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the leak-proof water supply valve.

[0016] Figure 2 It is a side sectional view of the leak-proof water supply valve.

[0017] Figure 3 It is a cross-sectional view of the bottom surface of the leak-proof water supply valve.

[0018] Figure 4 A partial cross-sectional view of a leak-proof water supply valve. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] Embodiment 1:

[0022] like Figures 1 to 4The leak-proof water-replenishing valve of a closed circulation system shown in the figure comprises a valve body 1, a valve core assembly 2, a pressure sensor 3, a one-way valve assembly 4, a flow sensor 5 and a controller 6. The closed circulation system refers to a medium in a closed circulation loop during operation. The closed circulation system suitable for the leak-proof water-replenishing valve includes a cold (heat) agent system in an air-conditioning system. In the leak-proof water-replenishing valve, a fluid medium inlet 11 and a fluid medium outlet 12 are provided on the valve body 1, and a medium channel 13 is formed between the fluid medium inlet 11 and the fluid medium outlet 12; connecting threads are usually arranged on the side walls of the pipe orifices of the fluid medium inlet 11 and the fluid medium outlet 12 to facilitate pipeline connection. After the leak-proof water-replenishing valve is connected to the waterway, the closed circulation system is downstream of the fluid medium outlet 12, and the external supply system is upstream of the fluid medium inlet 11. A filter screen 14 is provided on the fluid medium inlet 11 of the valve body 1 to prevent foreign matter from entering the closed circulation system.

[0023] The valve core assembly 2 is placed in the valve body 1, and controls the flow and disconnection of the medium channel 13. In one embodiment, the valve core assembly 2 includes a spherical valve core, a drive rod, and a reducer connected to the drive rod, a drive motor, a control panel, and sealing rings on both sides of the spherical valve core. The spherical valve core can rotate 360°, and the ball valve can control the flow and disconnection of the medium when it rotates to different positions. In other embodiments, the valve core assembly 2 can also be set as a solenoid valve structure, a gate valve structure, a three-way ball valve structure, etc.; such as the valve core assembly includes a diaphragm core, a valve stem connected to the diaphragm core, and a coil, spring and magnet that drive the valve stem and the diaphragm core.

[0024] The pressure sensor 3 is placed on the medium channel 13 downstream of the valve core assembly 2, and is used to detect fluid pressure parameters, which can characterize the medium pressure in the closed circulation system. Specifically, under a constant working state, the characteristics of the medium can be characterized by the medium pressure. In this technical solution, the fluid pressure parameter detected by the pressure sensor is the fluid pressure; when the fluid pressure is at a normal pressure value, it means that the closed circulation system is in a normal working state; and when the fluid pressure value decreases rapidly, it means that the closed circulation system may be in a leaking state; and when the fluid pressure value drops slightly frequently and multiple times, it means that the closed circulation system may be in a micro-leakage state; further combined with the action of the valve core assembly, it can be determined whether the system is actually leaking.

[0025] The one-way valve assembly 4 is placed in the medium channel 13 downstream of the valve core assembly 2, and automatically adjusts its opening angle according to the medium pressure upstream and downstream thereof. The one-way valve assembly 4 includes a one-way valve disc 41 and a torsion spring 42, and a one-way valve port 15 is arranged inside the valve body 1; one end of the one-way valve disc 41 is hinged on one side of the one-way valve port 15, and the torsion spring 42 is arranged on the hinged end of the one-way valve disc 41; the force of the torsion spring 42 on the one-way valve disc 41 drives the one-way valve disc 41 to close the one-way valve port 15. In the above technical solution, the one-way valve disc 41 is driven by the torsion spring 42, but the elasticity of the torsion spring 42 is relatively small, so under the condition of the fluid pressure difference of the one-way valve port 15, the fluid will act on the one-way valve disc 41, thereby automatically adjusting the opening; when the fluid pressure downstream of the one-way valve port 15 is less than or equal to the fluid pressure upstream of the one-way valve port 15, the one-way valve disc 41 is driven by the power of the fluid to rotate and open. When the fluid pressure downstream of the one-way valve port 15 is greater than or equal to the fluid pressure upstream of the one-way valve port 15, the fluid reverse pressure and the elastic force of the torsion spring 42 will drive the one-way valve plate 41 to close the one-way valve port 15, thereby preventing the fluid from flowing back and limiting the medium to flow in one direction only.

[0026] In addition, the maximum opening angle of the one-way valve plate 41 is 75°, and the pressure point 31 of the sensor 3 is within the opening inner diameter of the one-way valve plate 41; in this scheme, when the one-way valve plate 41 is in a closed state, the pressure point of the sensor is in the closed circulation system, and the fluid medium pressure in the closed circulation system can be monitored; and when the one-way valve plate 41 is in an open state, the pressure point of the sensor 3 is in the guiding area of ​​the one-way valve plate 41 for the medium, and the performance parameters of the fluid medium can be monitored in real time.

[0027] The flow sensor 5 is placed in the medium channel 13 downstream of the valve core assembly 2, and is used to detect the flow rate of the fluid, the fluid velocity of the replenished medium, and the cumulative mass parameter. The flow sensor 5 is realized for its detection function, and there is no need to limit its setting position; it can be arranged at the front end of the valve core assembly or at the rear end of the valve core assembly. However, in a preferred embodiment, the flow sensor includes an impeller 51, and a flow chamber 16 is provided inside the valve body 1 downstream of the one-way valve port 15. The impeller 51 is rotatably arranged in the flow chamber, and the wheel center of the impeller 51 is eccentrically arranged with the center line of the medium channel 13; the one-way valve disc 41 guides the fluid obliquely to the outer edge of the blade of the impeller 51 in the open state. In this technical solution, the one-way valve disc 41 has a guiding effect on the fluid in the open state, so that the fluid is focused on one side of the medium channel 13, and at the same time guides it to flow to the outer edge of the blade of the impeller 51, thereby increasing the power to drive the impeller 51 to rotate. The impeller assembly is equipped with electronic components 52. The rotation of the impeller causes the electrical signal of the component to change. The signal is output to the single-chip CPU and is used as the measured value of the flow sensor for control after data processing. In addition, the flow sensor can be a flow metering detection method in the form of an impeller, and of course, it can also be a flow metering detection method such as a turbine, vortex street, and ultrasonic wave.

[0028] The controller 6 compares the feedback data of the sensor 3 and the sensor 5 with the preset data of the system, and controls the action of the valve core assembly 2 based on the comparison result. It includes a control circuit board with a single-chip microcomputer, which is mainly composed of five parts: a power supply part, a signal acquisition input part, a central data processing part, a display operation part, and an output execution part.

[0029] Based on the above implementation, the purpose is to design the pressure measurement, flow measurement, and fluid flow control of the closed circulation system in a trinity. On the one hand, the pressure sensor 3 in the leak-proof water supply valve is used to monitor the medium pressure in the closed circulation system, and the flow sensor 5 is used to monitor the total amount of medium supplemented in the closed circulation system, and the controller 6 automatically controls the action of the valve core component 2 according to the monitoring result. When the medium pressure of the closed circulation system is detected to be reduced, the valve core component 2 is opened to supplement the medium (such as water, gas, oil or other fluid medium) from the outside to the closed circulation system; when the amount of supplemented medium exceeds the preset value, the combined action of the valve core component 2 and the pressure sensor 3 is started, and it can be clearly determined that the system is in a state of large leakage, medium leakage, slight leakage, etc. or is still in a normal state. Thereby achieving the purpose of automatically supplementing the medium and distinguishing the leakage. On the other hand, the leak-proof water supply valve is provided with a movable one-way valve plate 41. When the fluid power is very small, its opening is appropriately reduced to increase the fluid power, overcome the turbulent state, make the pressure measurement and flow measurement of the fluid more accurate, and at the same time expand its small flow measurement range or lower limit range value. When the fluid power is large, the valve plate will automatically increase its opening to reduce its resistance. For the fluid of the same pipe diameter, the maximum range or upper limit range value can be expanded. When the fluid flows in the reverse direction, the valve body 1 will be closed under the action of the fluid power and spring force to prevent the fluid from flowing back and play the function of one-way flow.

[0030] Embodiment 2:

[0031] This embodiment relates to a closed circulation system leak-proof water replenishment detection method, which uses the leak-proof water replenishment valve described in Example 1; and adopts the following comparison method:

[0032] 1) Compare the fluid pressure parameter detected by the pressure sensor 3 with the fluid pressure parameter of the closed circulation system under normal conditions,

[0033] 2) When the fluid pressure parameter is higher than the normal value, the controller 6 drives the valve core assembly 2 to close.

[0034] 3) When the fluid pressure parameter is lower than the normal value, the controller 6 drives the valve core assembly 2 to add medium from the outside; if the fluid pressure parameter is restored, the added medium is considered normal. If too much medium is added or the value of the sensor 3 does not return to normal, the controller 6 drives the valve core assembly 2 to operate and monitor the measured value of the sensor 3. If it continues to be an abnormal value, it is determined to be a leak.

[0035] 4) When there is a leakage, the controller 6 distinguishes between a large leakage, a small leakage, etc. according to the data of the flow sensor 5.

[0036] 5) When there is a leakage, the controller 6 starts the valve core assembly 2 to operate, gives a fault contact signal and triggers an alarm.

[0037] 6) When a small leak occurs in the system and the controller sounds an alarm, but the user cannot find the leak point after verification and confirms that the leak has not caused intolerable losses, the user can press the "fault tolerance button" and the intelligent leak-proof water supply valve will ignore the small leak and allow the system to work normally.

[0038] Embodiment 3:

[0039] This embodiment relates to a closed circulation system leak-proof water replenishment detection method, which uses the leak-proof water replenishment valve described in Example 1; and adopts the following comparison method:

[0040] 1) The controller 6 drives the valve core assembly 2 to operate, so that the system is always in a state of preparing to add medium; if the amount of medium added is within the control value, it is considered normal.

[0041] 2) If too much medium is added, the controller 6 drives the valve core assembly 2 to operate, and monitors the measured value of the sensor 3, and compares the fluid pressure parameter detected by the sensor 3 with the fluid pressure parameter of the closed circulation system under normal conditions. If it continues to be at an abnormal value, it is determined to be a leak. If it returns to the normal value range, it is determined that the system is still normal, and the action of 1) is continued.

[0042] 3) When there is a leakage, the controller 6 distinguishes between a large leakage, a small leakage, etc. according to the data of the flow sensor 5.

[0043] 4) When there is a leakage, the controller 6 starts the valve core assembly 2 to operate, gives a fault contact signal and triggers an alarm.

[0044] 5) When a small leak occurs in the system and the controller sounds an alarm, but the user cannot find the leak point after verification and confirms that the leak has not caused intolerable losses, the user can press the "fault tolerance button" and the intelligent leak-proof water supply valve will ignore the small leak and allow the system to work normally.

[0045] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An intelligent leak-proof water supply valve, characterized in that: include The valve body is provided with a fluid medium inlet and a fluid medium outlet, and a medium channel is formed between the fluid medium inlet and the fluid medium outlet; The one-way valve assembly is placed in the medium channel downstream of the valve core assembly and automatically adjusts the opening angle according to the medium pressure upstream and downstream thereof; A flow sensor is placed in the medium channel downstream of the valve core assembly and is used to detect the flow parameters of the fluid; the flow sensor includes an impeller, the center of the impeller is eccentrically arranged with respect to the center line of the medium channel; the one-way valve assembly, when in an open state, obliquely guides the fluid to the outer edge of the impeller blade; A one-way valve port is arranged inside the valve body, a flow cavity is arranged inside the valve body downstream of the one-way valve port, and an impeller is rotatably arranged in the flow cavity; It also includes a pressure sensor, which is placed in the medium channel downstream of the valve core assembly and is used to detect fluid pressure parameters, which can characterize the medium characteristics in the closed circulation system; the pressure taking point of the pressure sensor is arranged in the non-turbulent area on the downstream side of the valve core assembly and the one-way valve assembly.

2. The intelligent leak-proof water supply valve according to claim 1 is characterized in that: The one-way valve assembly includes a one-way valve plate and a torsion spring, one end of the one-way valve plate is hinged to one side of the one-way valve port, and the torsion spring is arranged on the hinged end of the one-way valve plate; the force of the torsion spring on the one-way valve plate drives the one-way valve plate to close the one-way valve port.

3. The intelligent leak-proof water supply valve according to claim 2 is characterized in that: The maximum opening angle of the one-way valve is 75°.

4. The intelligent leak-proof water supply valve according to claim 1, characterized in that: The pressure point of the pressure sensor is located within the opening inner diameter of the one-way valve plate.

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