High-precision flow measurement and regulation integrated device

Abstract

The present invention discloses a high-precision integrated flow measurement and regulation device. It includes a housing, a measuring cavity, electrodes, a baffle, an electrode outlet, a flow channel inlet, and a flow channel outlet; the housing forms a cavity connecting the flow channel inlet and the flow channel outlet, and the measuring cavity is located in the cavity and fixed; the measuring cavity connects the flow channel inlet and the flow channel outlet of the housing, thereby forming a flow channel through which the fluid medium passes; electrodes are arranged on the side of the measuring cavity, and the electrodes are in contact with the fluid medium in the measuring cavity, and are used to measure the induced potential generated by the fluid medium; a movable baffle is arranged at the flow channel outlet. The device is used for a balanced heat meter, a heating measurement and control terminal, a household heat meter with a valve, and a balanced valve with flow measurement. When the flow rate is adjusted, the electrode does not move, thereby reducing the flow rate measurement error during the adjustment process.

Description

Technical Field

[0001] The high-precision flow measurement and regulation integrated device described in the present invention relates to the technical fields of electromagnetic flow sensors, control valves, accurate flow measurement, accurate flow control, quantitative control, integrated meter and valve, heat metering, etc., and particularly to the fields of accurate measurement, heat metering, flow and heat balance of central heating systems and water system air conditioners, as well as urban water supply and drainage, agricultural irrigation, flow metering, quantitative control in production processes, etc. The present invention is applicable to balanced heat meters, heat metering devices with built-in control valves, heating measurement and control terminals with integrated flow sensors and control valves, electromagnetic flow meters, water meters, balancing valves, regulating valves, control valves, etc. Background Art

[0002] Electromagnetic flowmeter is a flow measurement instrument based on Faraday's electromagnetic induction principle. Its basic principle is: when a fluid with a conductive medium passes through a magnetic field, the fluid cuts the magnetic lines of force and generates an induced potential in the vertical direction of the magnetic field. The amplitude of the induced potential is proportional to the flow rate of the fluid, thereby obtaining the flow rate of the fluid and then the flow rate of the fluid. In order to generate a magnetic field, an excitation coil is installed around the measuring cavity. The generated magnetic field passes through the fluid, thereby generating an induced potential in the fluid. Electrodes are installed at the positive and negative positions of the induced potential to measure the magnitude of the induced potential. Electromagnetic flowmeters are widely used in flow measurement and have the advantages of high measurement accuracy, good linearity, no structural parts in the measuring cavity, and resistance to pollutants.

[0003] A control valve is a device used to control the flow rate of a fluid. Depending on the structure, there are single-seat regulating valves, double-seat regulating valves, ball valves, hemispherical valves, butterfly valves, gate valves, etc. The main components of a control valve include a valve core and a valve body. The valve core is located in the valve body and can rotate or move relative to the valve body to adjust the opening of the control valve. In order to achieve different flow control characteristic curves such as equal percentage and linear, the valve core is designed into various curve shapes, such as V-shaped or W-shaped, to meet different flow regulation requirements. For valves that rotate horizontally, the V-shaped or W-shaped through holes of the valve core are all set in the horizontal direction.

[0004] The electromagnetic flowmeter and the control valve are combined to form a control valve with a built-in electromagnetic flow sensor, thereby realizing flow measurement and regulation at the same time. In the prior art, a cylindrical valve core is arranged in the valve body, and a through hole is arranged in the valve core to connect the inlet and outlet of the valve body. An electrode is arranged in the valve core for collecting the potential signal of the flow sensor. The valve core can be rotated to adjust the flow area of ​​the flow channel of the control valve to achieve the purpose of flow rate regulation.

[0005] The integrated device of electromagnetic flow sensor and valve in the prior art, patent ZL201210301767.9 "Electromagnetic flow measurement and control integrated device" discloses an arrangement structure, including a valve body, a valve core and a valve stem; the valve body includes an inlet pipe, a cavity, an outlet pipe, a cavity cover, and a coil, the cavity is located between the inlet pipe and the outlet pipe, the cavity and the cavity cover form a cavity with a top opening, and the valve core is installed in the cavity; the valve core is provided with a through hole connecting the inlet pipe and the outlet pipe, the valve core includes a second magnetic core, a first electrode, a second electrode, and a lead wire; the second magnetic core is located above the through hole of the valve core, the first electrode and the second electrode are symmetrically distributed on the inner walls on both sides of the through hole, the lead wire is in the shape of an inverted fork, the two ends of the fork head of the lead wire are respectively connected to the first electrode and the second electrode, and the fork rod of the lead wire extends from the valve stem; the valve stem is located at the top of the valve core, extends from a cavity with a top opening formed by the cavity and the cavity cover, and a sealing ring is provided between the valve stem and the cavity cover. Patent ZL201210301750.3 "A flow measurement and control integrated device" discloses another arrangement structure, including a valve body, a valve core and a valve stem; the valve body includes an inlet pipe, a cavity body, an outlet pipe, and a cavity cover, the cavity is located between the inlet pipe and the outlet pipe, the cavity and the cavity cover form a cavity with an open top, and the valve core is installed in the cavity; the valve core is provided with a through hole connecting the inlet pipe and the outlet pipe, the valve core includes a coil, a first electrode, a second electrode, and a lead wire; the first electrode and the second electrode are symmetrically arranged at both ends of the through hole, the lead wire is an inverted fork shape, the two ends of the fork head of the lead wire are respectively connected to the first electrode and the second electrode, and the fork rod of the lead wire extends from the valve stem; the valve stem is located at the top of the valve core, and extends from a cavity with an open top formed by the cavity body and the cavity cover, and a sealing ring is provided between the valve stem and the cavity cover. Patent ZL201310196992.5 "Integrated device of valve and electromagnetic flowmeter and its application" discloses another arrangement structure, including a valve core, a magnetic conductive plate, a first electrode, a second electrode, a first lead, a second lead, a circuit board, a valve body, a valve cover, a coil, a magnetic core, a skeleton, and a U-shaped steel sleeve. The valve body and the valve cover form a cavity with a top and a horizontal opening, and the valve core is located in the cavity. The valve core includes a through hole connecting the horizontal opening of the cavity, and is divided into an upper through hole and a lower through hole by a magnetic conductive plate. The first electrode and the second electrode are respectively located on the left and right sides of the lower through hole. The first electrode is connected to the circuit board through the first lead, and the second electrode is connected to the circuit board through the second lead. The coil surrounds the magnetic core, is located below the valve core, and is placed in a U-shaped steel sleeve. The magnetic conductive plate, the magnetic core, and the U-shaped steel sleeve are all magnetic conductors. The present invention places the sensor for measuring the electromagnetic flowmeter in the valve core, and divides the through hole of the valve core into an upper through hole and a lower through hole by a magnetic conductive plate. The magnetic field is concentrated in the lower through hole, the electrodes are arranged on both sides of the lower through hole, and the coil is located below the valve core, thereby realizing the integration of the valve and the electromagnetic flowmeter.Patent ZL201910471279.4 "An integrated device of an electromagnetic flow sensor and a valve" discloses an arrangement structure, including a valve core, a valve body, a coil, a W-shaped steel sleeve, a first magnetic conductive column and a second magnetic conductive column; the valve body forms a cavity with a top and front and rear openings, the valve core is located in the cavity and can be horizontally rotated and moved; the valve core is provided with a horizontal through hole connecting the front and rear openings of the valve body; the valve core includes a U-shaped first electrode and a second electrode placed opposite to each other, and is electrically connected to the printed circuit board through a first conductive plastic and a second conductive plastic; the coil is placed in the W-shaped cavity of the W-shaped steel sleeve, located below the valve body, with a magnetic conductive plate provided between them; the first magnetic conductive column and the second magnetic conductive column are respectively located on the left and right sides of the valve body, the lower part is respectively connected to the left and right sides of the W-shaped steel sleeve, and the upper part is connected to the left and right sides of the magnetic conductive cover above the valve body.

[0006] In the above prior art, the electrodes are arranged in the valve core and are integrated with the valve core. When the valve core rotates, the electrodes also rotate. The valve cores of the prior art are all cylindrical. When the valve core rotates a certain angle, the valve core through hole and the flow channel inlet and flow channel outlet of the valve body are misaligned, forming an irregular S-shaped flow channel, which causes a large change in the flow shape of the fluid medium, thereby causing measurement errors. Therefore, the prior art needs to correct the influence of the flow shape at different valve core positions. This correction cannot completely eliminate the influence of the flow shape on the measurement accuracy, resulting in the inability to achieve accurate measurement.

[0007] In the control valve with built-in electromagnetic flow sensor in the prior art, the magnetic conductor cannot be evenly distributed along the circumference of the valve core rotation. When the valve core rotates, the distributed magnetic field in the valve core through hole changes. Since the induced potential on the electrode is proportional to the magnetic field strength, the change of the magnetic field strength in the valve core through hole will cause the change of the electrode signal. Therefore, the prior art needs to correct the flow rate according to the magnetic field strength at different valve core positions. Since the valve core position is not precise, the magnetic field strength in the valve core through hole has a certain uncertainty, which affects the accurate measurement of the flow rate.

[0008] In the prior art control valve with built-in electromagnetic flow sensor, the electrode is made of metal material, and the contact area between the electrode and the fluid medium is point-shaped, with a small contact area, large resistance, and large random noise. The electrode surface needs to be passivated, and the plastic material of the electrode and the valve core cannot be tightly combined, requiring additional waterproof sealing, such as using conductive plastic for secondary injection molding sealing, and the manufacturing process and assembly process are complicated.

[0009] In the prior art control valve with built-in electromagnetic flow sensor, the electrodes are arranged in the valve core, which causes the flow field and magnetic field to change when the valve core rotates, and it is impossible to accurately measure the flow rate of the fluid medium. Therefore, the flow control of the prior art cannot achieve synchronous measurement of the flow rate when the valve core rotates, and adjust the movement of the valve core according to the measured flow rate. As a result, the flow control accuracy of the prior art is poor, the adjustment speed is slow, the adjustment times are large, and the action is frequent.

[0010] With the development of smart heating systems and the need for energy management, thermal energy measurement, digital management and precise scheduling have become the key to energy conservation. Invent a device that can achieve high-precision flow and heat measurement, as well as high-precision flow and heat regulation, to meet the needs of smart heating systems for heat metering, digital management and scheduling. The existing technology has not yet seen an integrated solution that can achieve high-precision flow measurement and regulation.

[0011] In summary, the conventional control valve with built-in electromagnetic flow sensor has the following problems:

[0012] 1) The electrode rotates with the valve core, causing the flow shape to change, affecting the flow measurement accuracy;

[0013] 2) The electrode rotates with the valve core, and the distributed magnetic field changes, affecting the flow measurement accuracy;

[0014] 3) Using point electrodes, the signal noise is large and it is not easy to seal;

[0015] 4) When adjusting the flow rate, the flow rate cannot be collected synchronously with high precision, resulting in poor adjustment accuracy, slow speed and frequent actions. Summary of the invention

[0016] The purpose of the present invention is to provide a high-precision integrated flow measurement and regulation device to solve the problems of low measurement accuracy caused by changes in flow shape and magnetic field after the valve core rotates in the prior art, large noise caused by point electrodes, poor flow rate regulation accuracy, slow regulation speed and frequent actions, especially to solve the technical problems of high-precision flow measurement and precise and rapid control of valves in balanced heat meters, heating measurement and control terminal equipment, and intelligent balancing valves.

[0017] A high-precision flow measurement and regulation integrated device comprises a shell, a measuring cavity, electrodes, a baffle, a flow channel inlet and a flow channel outlet; the shell forms a cavity connecting the flow channel inlet and the flow channel outlet, the measuring cavity is located in the cavity and is fixed, the measuring cavity is arranged with a through hole, connecting the flow channel inlet and the flow channel outlet of the shell, thereby forming a flow channel through which a fluid medium passes; electrodes are arranged on the side of the through hole of the measuring cavity, the electrodes are in contact with the fluid medium in the measuring cavity, and are used to measure the induced potential generated by the fluid medium; a movable baffle is arranged between the measuring cavity and the flow channel outlet.

[0018] The baffle is arranged on one side of the measuring cavity, one end of which can move or rotate, and the other end can move to the other side of the measuring cavity, so as to adjust the flow area of ​​the flow channel.

[0019] When the baffle moves, the movement tracks of one end and the other end thereof are both arcs or straight lines.

[0020] The baffle contacts the surface of the measuring cavity, or the surface of the flow channel outlet, and is provided with elastic sealing materials, such as polytetrafluoroethylene, rubber, silicone, thermoplastic elastomer and the like, to facilitate sealing after the baffle is closed.

[0021] The shell is made of conductive material, such as metal, conductive plastic, etc.

[0022] The measuring cavity is made of insulating plastic, the electrode is made of conductive plastic, and the insulating plastic and the conductive plastic are tightly combined by a secondary injection molding process.

[0023] The vertical height of the contact surface of the electrode with the fluid medium is greater than the horizontal width, so as to reduce the electrode noise and facilitate the high-precision measurement of the flow rate.

[0024] While the baffle is moving, the potential of the electrode is measured to obtain the flow rate of the fluid medium, so as to facilitate high-precision regulation of the flow rate.

[0025] The measuring cavity comprises an electrode outlet, the measuring cavity surrounds the electrode with insulating material and extends to the outside of the shell.

[0026] The present invention provides a method for reducing the influence of manifold on flow measurement accuracy when the flow velocity is adjusted. A fixed measuring cavity is arranged in the cavity of the valve body of the present invention, and the electrodes of the built-in electromagnetic flow sensor are used to measure the velocity of the fluid. The flow channel inlet of the valve body is connected to the measuring cavity as the inlet of the fluid medium. When the fluid is adjusted, the measuring cavity is fixed, so there is no change in the flow channel, and the measuring cavity will not cause the change of the manifold. At the same time, the present invention sets a baffle between the measuring cavity and the housing, and the baffle moves to adjust the flow velocity. Since the measuring cavity does not move when the baffle moves, the manifold of the fluid changes slightly, and the influence on the measurement accuracy can be ignored. Therefore, when the flow is adjusted, the change of the manifold of the present invention is extremely small, thereby improving the accuracy of flow measurement.

[0027] The present invention provides a method for reducing the influence of magnetic field on flow measurement accuracy when adjusting flow rate. A fixed measuring cavity is arranged in the cavity of the valve body of the present invention, and an electrode of an electromagnetic flow sensor is built in, which is used to measure the velocity of the fluid. At the same time, a baffle is arranged between the measuring cavity and the housing, and the baffle moves to adjust the flow rate. Since the measuring cavity does not move when the baffle moves, it will not affect the magnetic field distribution of the measuring cavity, so when the flow rate is adjusted, it has no influence on the flow measurement accuracy.

[0028] The present invention provides a low-noise electrode structure and an electrode sealing method for an electromagnetic flow sensor. The present invention sets an electrode in the measuring cavity, the measuring cavity adopts insulating plastic, the electrode adopts conductive plastic, and the insulating plastic and the conductive plastic are tightly combined by a secondary injection molding process. Secondary injection molding is a commonly used process for the production of plastic parts. Two plastics that are easy to combine are selected, and the tight combination of the two plastics can be ensured by secondary injection molding. By adopting secondary injection molding, the water tightness of the electrode can be directly provided so as to collect the potential signal of the electrode. The contact surface between the electrode of the present invention and the fluid medium extends to the top and bottom of the measuring cavity, and is symmetrical on both sides, with a large contact area, so that the noise on the electrode is reduced. Since the conductivity of conductive plastic is low, such an electrode with a large contact area can ensure that the electrode of the conductive plastic material has good low-noise characteristics.

[0029] The present invention provides a high-precision flow rate regulation method for synchronously collecting flow rate. A fixed measuring chamber is arranged in the cavity of the valve body of the present invention, and the electrodes of the built-in electromagnetic flow sensor are used to measure the velocity of the fluid. At the same time, the present invention respectively arranges movable baffles between the measuring chamber and the outer shell to achieve flow rate regulation. Since the present invention has little effect on the flow shape and magnetic field when regulating the flow rate, high-precision flow measurement can be achieved. Therefore, the present invention also provides high-precision regulation of the flow rate by using high-precision synchronous flow rate sampling as a feedback signal in flow regulation.

[0030] Therefore, compared with the prior art, the present invention has the following advantages:

[0031] 1) When the baffle moves to adjust the flow rate, the measuring chamber and the electrode are fixed, and the flow channel at the inlet of the measuring chamber is fixed, so there will be no flow shape change, and the impact on the measurement accuracy can be ignored, so high-precision flow measurement can be achieved.

[0032] 2) When the baffle moves to adjust the flow rate, the measuring cavity and the electrode are fixed, and the magnetic field distribution in the measuring cavity does not change, which can achieve high-precision flow measurement;

[0033] 3) The electrode sampling conductive plastic has a large contact area, and the measurement cavity is sealed by secondary injection molding, the electrode signal noise is low, and the sealing process is simple;

[0034] 4) High-precision synchronous flow velocity sampling is used as the feedback signal for flow regulation to achieve high-precision regulation of flow velocity.

[0035] Of course, any technical solution of the present invention may not be able to achieve all of the above beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a cross-sectional view of an embodiment of the high-precision flow measurement and regulation integrated device of the present invention.

[0037] In the figure, there is a housing 1, a measuring cavity 2, an electrode 3, a baffle 4, an electrode outlet 5, a flow channel inlet 6, and a flow channel outlet 7.

[0038] Figure 2 It is a cross-sectional view of two other embodiments of the high-precision flow measurement and regulation integrated device of the present invention.

[0039] In the figure, there is a housing 1, a measuring cavity 2, an electrode 3, a baffle 4, an electrode outlet 5, a flow channel inlet 6, and a flow channel outlet 7. DETAILED DESCRIPTION

[0040] The present invention is further described below in conjunction with the accompanying drawings.

[0041] See also Figure 1 , is a cross-sectional view of an embodiment of the high-precision flow measurement and regulation integrated device of the present invention. This embodiment includes a housing 1, a measurement chamber 2, an electrode 3, a baffle 4, an electrode outlet 5, a flow channel inlet 6, and a flow channel outlet 7.

[0042] Inside the housing 1, a rectangular cavity is formed connecting the flow channel inlet 6 and the flow channel outlet 7. The measuring cavity 2 is arranged in the rectangular cavity. The fluid medium passes through the flow channel inlet 6, the measuring cavity 2, and the flow channel outlet 7 in sequence to measure the flow rate of the fluid medium. The cross-sections of the flow channel inlet 6, the measuring cavity 2, and the flow channel outlet 7 are rounded rectangles, and they are smoothly connected in sequence so that the flow shape of the fluid medium remains stable. The electrode 3 is arranged vertically on the side of the measuring cavity. The contact surface between the electrode and the fluid medium is a vertical rectangle and forms a large contact area to reduce the noise caused by the impact of the fluid medium. The electrode is injection molded with conductive plastic, and the measuring cavity 2 is secondary injection molded with insulating plastic and the electrode so that the electrode and the measuring cavity wall are tightly combined to avoid water seepage. The housing 1 is made of conductive materials, such as stainless steel, conductive plastic, etc., to achieve electromagnetic shielding.

[0043] A baffle 4 is arranged between the housing 1 and the measuring chamber 2. The upper end of the baffle 4 is an arc and can rotate, thereby driving the lower end to move. When the lower end of the baffle 4 moves toward the measuring chamber 2 until they are in contact with each other, the valve is in a closed state. When the lower end of the baffle 4 leaves the measuring chamber 2 to a horizontal direction, the valve is in an open state. The contact surface between the baffle 4 and the measuring chamber 2 has an elastic material to enhance the sealing between the baffle 4 and the measuring chamber 2 when the valve is closed. The elastic material is a thermoplastic elastomer, which is integrated with the baffle by a secondary injection molding process.

[0044] When the baffle 4 moves, high-precision flow measurement can be achieved simultaneously, and it can serve as a real-time feedback signal for valve adjustment, so that the flow rate can be adjusted with high precision. Figure 1 The baffle 4 shown is a position where the valve is at a certain opening, which is only an example of the valve position.

[0045] See also Figure 2 , is a cross-sectional view of another embodiment of the high-precision flow measurement and regulation integrated device of the present invention. This embodiment includes a housing 1, a measuring chamber 2, an electrode 3, a baffle 4, an electrode outlet 5, a flow channel inlet 6, and a flow channel outlet 7.

[0046] Inside the housing 1, a rectangular cavity is formed connecting the flow channel inlet 6 and the flow channel outlet 7. The measuring cavity 2 is arranged in the rectangular cavity. The fluid medium passes through the flow channel inlet 6, the measuring cavity 2, and the flow channel outlet 7 in sequence to measure the flow rate of the fluid medium. The cross-sections of the flow channel inlet 6, the measuring cavity 2, and the flow channel outlet 7 are rounded rectangles, and they are smoothly connected in sequence so that the flow shape of the fluid medium remains stable. The electrode 3 is arranged vertically on the side of the measuring cavity. The contact surface between the electrode and the fluid medium is a vertical rectangle and forms a large contact area to reduce the noise caused by the impact of the fluid medium. The electrode is injection molded with conductive plastic, and the measuring cavity 2 is secondary injection molded with insulating plastic and the electrode so that the electrode and the measuring cavity wall are tightly combined to avoid water seepage. The housing 1 is made of conductive materials, such as stainless steel, conductive plastic, etc., to achieve electromagnetic shielding.

[0047] A baffle 4 is arranged between the housing 1 and the measuring chamber 2. The cross section of the baffle 4 is a wedge-shaped one that is wide at the top and narrow at the bottom, and can move up and down. When the lower end of the baffle 4 moves downward to contact the housing 1, the valve is in a closed state. When the baffle 4 moves upward, the valve is opened. An elastic material can be arranged on the contact surface between the baffle 4 and the flow channel outlet 7 to enhance the sealing between the baffle 4 and the housing 1 when the valve is closed. The elastic material can be a thermoplastic elastomer, which is combined with the baffle by a secondary injection molding process.

[0048] When the baffle 4 moves, high-precision flow measurement can be achieved simultaneously, and it can serve as a real-time feedback signal for valve adjustment, so that the flow rate can be adjusted with high precision. Figure 2 The baffle 4 shown is a position where the valve is at a certain opening, which is only an example of the valve position.

[0049] The present embodiment is a high-precision integrated flow measurement and regulation device, the inner cavity of the shell is approximately a cube, the baffle is rotated or moved linearly, and the use of an arc-shaped baffle, moving along the arc, is also an arrangement method, and does not affect the characteristics of the present device. This technology is well known to those skilled in the art, and such situations are also within the scope of protection of the present invention.

[0050] The present embodiment is a high-precision integrated flow measurement and regulation device, the inner cavity of the shell is approximately cubic, and can also be designed as a cubic cone to facilitate sealing and assembly. These shape changes do not affect the characteristics of the device. This technology is well known to those skilled in the art, and such situations are also within the protection scope of the present invention.

[0051] The present embodiment is a high-precision integrated flow measurement and regulation device. In order to ensure the movement of the baffle, limiting mechanisms such as guide rails and sliders can be further provided. The provision of these limiting mechanisms does not affect the substantial performance of the present device and is a technology well known to those skilled in the art. Such situations are also within the protection scope of the present invention.

[0052] The present embodiment is a high-precision integrated flow measurement and regulation device, which can use gears, push rods, connecting rods, rocker arms, etc. to drive the movement of the baffle. The settings of these mechanisms do not affect the actual performance of the device and are technologies well known to those skilled in the art. Such situations are also within the scope of protection of the present invention.

[0053] The present embodiment is a high-precision integrated flow measurement and regulation device, in which the electrode is made of conductive plastic, and can also be made of a composite of metal and conductive plastic, that is, the contact part with the fluid medium is made of metal material to reduce electrode noise, and the electrode signal is led out using conductive plastic to achieve sealing of the electrode. This technology is a public technology and is well known to those skilled in the art. Such situations are also within the scope of protection of the present invention.

[0054] The present embodiment is a high-precision integrated flow measurement and regulation device, which does not include the technology of the excitation device. The relevant excitation device can adopt the currently disclosed general technology, which does not affect the characteristics of the present device and is a technology well known to those skilled in the art. Such situations are also within the protection scope of the present invention.

[0055] The present embodiment is a high-precision integrated flow measurement and regulation device, which does not include the technology of the baffle motor drive mechanism. The relevant baffle motor drive mechanism can adopt the currently disclosed general technology, which does not affect the characteristics of the present device and is a technology well known to those skilled in the art. Such situations are also within the scope of protection of the present invention.

[0056] The present embodiment is a high-precision integrated flow measurement and regulation device. The baffle can also move or rotate in the vertical direction. The baffle can move or rotate in the horizontal direction. This mirroring and / or rotating the baffle to any angle is only one arrangement of the baffle. The best baffle arrangement can be selected for different excitation methods. These do not affect the essential characteristics of the present device and are technologies well known to those skilled in the art. Such situations are also within the scope of protection of the present invention.

[0057] The present embodiment is a high-precision integrated flow measurement and regulation device, which forms a combined baffle by combining a larger number of baffles, sealing parts, driving parts, etc. However, the change in this simple combination form does not affect the essential characteristics of the present device, which is a technology well known to those skilled in the art, and such situations are also within the scope of protection of the present invention.

[0058] The present embodiment is a high-precision integrated flow measurement and regulation device. Mirroring and / or rotating the device at any angle does not affect the characteristics of the device. This is a technology well known to those skilled in the art, and such situations are also within the protection scope of the present invention.

[0059] The above disclosures are only several specific embodiments of the present invention, but the present invention is not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A high-precision flow measurement and regulation integrated device, characterized in that: The device comprises a housing (1), a measuring cavity (2), an electrode (3), a baffle (4), a flow channel inlet (6), and a flow channel outlet (7); the housing (1) forms a cavity connecting the flow channel inlet (6) and the flow channel outlet (7); the measuring cavity (2) is located in the cavity and is fixed; the measuring cavity (2) is provided with a through hole connecting the flow channel inlet (6) and the flow channel outlet (7) of the housing (1), thereby forming a flow channel through which a fluid medium passes; an electrode (3) is arranged on a side surface of the through hole of the measuring cavity (2); the electrode (3) contacts the fluid medium in the measuring cavity (2) and is used to measure the induced potential generated by the fluid medium; a movable baffle (4) is arranged between the measuring cavity (2) and the flow channel outlet (7); The baffle (4) is arranged on one side of the measuring chamber (2), one end of which is movable, and the other end of which is movable toward the other side of the measuring chamber (2), thereby adjusting the flow area of ​​the flow channel; When the baffle (4) moves, the movement trajectories of one end and the other end thereof are both arcs or straight lines; The baffle (4) contacts the surface of the measuring cavity (2) or the surface of the flow channel outlet (7), and is provided with an elastic sealing material, wherein the elastic sealing material includes a thermoplastic elastomer, so as to facilitate sealing after the baffle is closed; The housing (1) is made of conductive material, including metal or conductive plastic; The measuring cavity (2) is made of insulating plastic, the electrode (3) is made of conductive plastic, and the insulating plastic and the conductive plastic are tightly combined using a secondary injection molding process.

2. A high-precision flow measurement and regulation integrated device as claimed in claim 1, characterized in that: The contact surface of the electrode (3) with the fluid medium has a vertical height greater than a horizontal width, so as to reduce electrode noise and facilitate high-precision measurement of flow.

3. A high-precision flow measurement and regulation integrated device as claimed in claim 1, characterized in that: While the baffle (4) is moving, the electric potential of the electrode (3) is measured to obtain the flow rate of the fluid medium, thereby facilitating high-precision regulation of the flow rate.

4. A high-precision flow measurement and regulation integrated device as claimed in claim 1, characterized in that: The measuring cavity (2) comprises an electrode outlet (5); the measuring cavity (2) surrounds the electrode (3) with insulating material and extends to the outside of the housing (1).

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