Integrated flow measurement and regulation device with split structure

Abstract

The present invention discloses an integrated flow measurement and regulation device of a split structure, including a shell, a left wall of a measuring chamber, a right wall of the measuring chamber, a first electrode, a second electrode, a first baffle, and a second baffle; the shell forms a cavity with a flow channel inlet and a flow channel outlet, the left wall of the measuring chamber is located on one side of the cavity and is fixed, and the right wall of the measuring chamber is located on the other side of the cavity and is fixed; the space between the left wall of the measuring chamber and the right wall of the measuring chamber forms a measuring chamber, and the measuring chamber connects the flow channel inlet and the flow channel outlet of the shell; the first electrode is arranged on the left wall of the measuring chamber, and the second electrode is arranged on the right wall of the measuring chamber; a movable first baffle and a second baffle are 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 in the present invention, the baffle movement adopts a symmetrical arrangement to reduce the flow rate measurement error in the adjustment process; the arrangement of the drive shaft realizes low-torque drive of the valve baffle.

Description

Technical Field

[0001] The integrated flow measurement and regulation device of a split structure 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 of 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 velocity of the fluid, thereby obtaining the flow velocity and 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, 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 measured flow rate according to the magnetic field strength at different valve core positions. Since the valve core position is not accurate, 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, when the valve core rotates, there is friction between the valve core and the valve body, and a large torque is required to rotate the valve core. In the prior art, the rotation of the valve core is driven by the valve stem. When the diameter of the valve core is large, such as the torque of a large-diameter control valve, the valve stem needs to provide a large driving torque to drive the valve core, which makes the flow regulation inaccurate.

[0009] 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.

[0010] 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.

[0011] The flow regulation characteristic curve of the valve core of the existing control valve with built-in electromagnetic flow sensor is close to linear. When adjusting small flow, its sensitivity is low and it is impossible to achieve high-precision small flow regulation. The V-shaped or W-shaped opening of the valve core of the ordinary rotary structure valve is set in the horizontal direction. The combination with the flow sensor will seriously affect the flow measurement accuracy, so it cannot be integrated and used together.

[0012] 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. There is an urgent need for a device that can achieve both high-precision flow and heat measurement and high-precision flow and heat regulation to meet the needs of smart heating systems for heat metering, digital management and scheduling, but the existing technology has not yet seen an integrated solution that can achieve high-precision flow measurement and regulation.

[0013] In summary, the conventional control valve with built-in electromagnetic flow sensor has the following problems:

[0014] 1) The electrode rotates with the valve core, causing the flow shape to change, affecting the flow measurement accuracy;

[0015] 2) The electrode rotates with the valve core, and the distributed magnetic field changes, affecting the flow measurement accuracy;

[0016] 3) The valve core rotation is driven by the valve stem, and the torque is large, resulting in inaccurate valve core movement;

[0017] 4) Using point electrodes, the signal noise is large and it is not easy to seal;

[0018] 5) The flow rate cannot be collected synchronously with high precision during flow rate adjustment, resulting in poor adjustment accuracy, slow speed and frequent actions;

[0019] 6) The flow regulation characteristic curve of the valve core is close to linear, and the sensitivity is low when adjusting small flow. Summary of the invention

[0020] The purpose of the present invention is to provide an integrated flow measurement and regulation device with a split structure to solve the problems of low measurement accuracy caused by changes in flow shape and magnetic field after the valve core rotates, inaccurate valve core movement caused by large driving torque, large noise caused by point electrodes, poor flow rate regulation accuracy, slow regulation speed and frequent movements, low sensitivity for small flow regulation, and especially to solve technical problems such as 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.

[0021] An integrated flow measurement and regulation device with a split structure comprises a shell, a left wall of a measuring cavity, a right wall of the measuring cavity, a first electrode, a second electrode, a first baffle, a second 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 left wall of the measuring cavity is located on one side of the cavity and is fixed, and the right wall of the measuring cavity is located on the other side of the cavity and is fixed; the space between the left wall of the measuring cavity and the right wall of the measuring cavity forms a measuring cavity, and the measuring cavity connects the flow channel inlet and the flow channel outlet of the shell, thereby forming a flow channel through which a fluid medium passes; a first electrode is arranged on the left wall of the measuring cavity, and a second electrode is arranged on the right wall of the measuring cavity, the first electrode and the second electrode 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 first baffle is arranged on one side close to the flow channel outlet, and a movable second baffle is arranged on the other side close to the flow channel outlet.

[0022] The left wall and the right wall of the measuring cavity, the first electrode and the second electrode, the first baffle and the second baffle are all symmetrically distributed along the central axis of the flow channel to facilitate high-precision measurement of the flow rate.

[0023] One end of the first baffle and the second baffle can move toward the central axis of the flow channel, and the other end can move or rotate, so as to adjust the flow area of ​​the flow channel.

[0024] The movement tracks of the first baffle and the second baffle are symmetrical arcs.

[0025] A first driving shaft and a second driving shaft are arranged between the measuring cavity and the housing. When the first driving shaft rotates, it pushes the first baffle plate to move. When the second driving shaft rotates, it pushes the second baffle plate to move.

[0026] The first driving shaft and the first baffle are provided with gears that fit together, and the second driving shaft and the second baffle are provided with gears that fit together.

[0027] The flow channel outlet of the shell is provided with an annular sealing gasket, and the contact surface between the sealing gasket and the first baffle plate and the second baffle plate is arranged with elastic sealing materials, such as polytetrafluoroethylene, rubber, silicone, thermoplastic elastomer and other materials, so as to enhance the sealing of the first baffle plate and the second baffle plate relative to the shell.

[0028] A vertical column is further arranged in the middle of the flow channel outlet 11 of the shell 1, and the contact surface between the column and the first baffle plate and the second baffle plate is arranged with elastic sealing materials, such as polytetrafluoroethylene, rubber, silicone, thermoplastic elastomer and the like, to enhance the sealing between the first baffle plate and the second baffle plate.

[0029] The first baffle is provided with a first elastic body on one side surface close to the flow channel outlet; the second baffle is provided with a second elastic body on one side surface close to the flow channel outlet. The first elastic body and the second elastic body are made of elastic sealing materials, such as polytetrafluoroethylene, rubber, silicone, thermoplastic elastomer, etc., to facilitate sealing after the baffle is closed.

[0030] The first elastic body is attached to the surface of the first baffle plate by adopting a secondary injection molding process; the second elastic body is attached to the surface of the second baffle plate by adopting a secondary injection molding process.

[0031] The cross-section of the end faces where the first baffle plate and the second baffle plate contact each other is provided with a first curve and a second curve with W-shaped or V-shaped features, forming a vertical V-shaped or W-shaped opening, so as to improve the flow regulation characteristics under small opening.

[0032] A protruding first stop block is provided on one side surface of the cavity of the shell, a first U-shaped groove is provided on the outer side of the first baffle plate, the first stop block is located in the first U-shaped groove, and is used for limiting the first baffle plate when it moves; a protruding second stop block is provided on the other side surface of the cavity of the shell, a second U-shaped groove is provided on the outer side of the second baffle plate, the second stop block is located in the second U-shaped groove, and is used for limiting the second baffle plate when it moves.

[0033] The cavity of the shell is provided with a protruding first stop block on one side surface close to the flow channel inlet for limiting the position of the first baffle when it moves; and a protruding second stop block is provided on the other side surface close to the flow channel inlet for limiting the position of the second baffle when it moves.

[0034] The left wall of the measuring cavity is provided with a protruding first stop block on the outer side near the flow channel inlet for limiting the position of the first baffle when moving. The right wall of the measuring cavity is provided with a protruding second stop block on the outer side near the flow channel inlet for limiting the position of the second baffle when moving.

[0035] The shell is made of conductive material, such as metal, conductive plastic, etc.

[0036] The left wall and the right wall of the measuring cavity are made of insulating plastic, the first electrode and the second electrode are made of conductive plastic, and the insulating plastic and the conductive plastic are tightly combined by a secondary injection molding process.

[0037] The vertical height of the contact surface between the first electrode and the second electrode and 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.

[0038] While the first baffle plate and the second baffle plate are moving, the potential of the first electrode and the second electrode are measured to obtain the flow rate of the fluid medium, so as to facilitate high-precision regulation of the flow rate.

[0039] The present invention provides a method for reducing the influence of manifold on flow measurement accuracy when the flow rate is regulated. A fixed measuring cavity is arranged in the cavity of the valve body of the present invention, and the electrodes of the electromagnetic flow sensor are built in 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 regulated, 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 symmetrical first baffle and a second baffle between the measuring cavity and the housing, which are driven by the first drive shaft and the second drive shaft at the same time to achieve the regulation of the flow rate. Since the first baffle and the second baffle move symmetrically, when the flow is regulated, the outlet of the measuring cavity is a symmetrical indentation structure, and the flow shape of the fluid changes less. According to the characteristics of the electromagnetic flow sensor, the outlet of the measuring cavity adopts a symmetrical taper indentation design, and the influence on the measurement accuracy can be ignored. Therefore, when the flow is regulated, the change of the manifold is extremely small, which improves the accuracy of the flow measurement.

[0040] 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 the electrodes of the electromagnetic flow sensor are built in to measure the velocity of the fluid. At the same time, the present invention arranges a symmetrical first baffle and a second baffle between the measuring cavity and the housing, which are driven by a first drive shaft and a second drive shaft at the same time to adjust the flow rate. Since the magnetic field distribution of the measuring cavity is not affected when the first baffle and the second baffle move, the flow measurement accuracy is not affected when the flow rate is adjusted.

[0041] The present invention provides a method for driving a valve with high precision at low torque. The present invention respectively arranges a first baffle and a second baffle, and a first drive shaft and a second drive shaft between a measuring chamber and a housing. The first drive shaft and the first baffle are provided with gears that fit each other, and the second drive shaft and the second baffle are provided with gears that fit each other. When the first drive shaft and the second drive shaft rotate, the first baffle and the second baffle are driven to move, so as to adjust the flow rate. The baffle and the drive shaft form a reduction gear structure, which has a smaller driving torque compared with the valve stem drive. The fitting gear between the drive shaft and the baffle of the present invention is arranged near the center line of the baffle, and the baffle will only be subjected to the thrust in the moving direction. Compared with the valve stem drive, it will not be affected by the torque, so that the movement is more stable, and high-precision flow rate adjustment can be achieved.

[0042] The present invention provides a low-noise electrode structure and an electrode sealing method for an electromagnetic flow sensor. In the present invention, electrodes are respectively arranged on the left wall and the right wall of the measuring chamber, the measuring chamber wall 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. 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 first electrode and the second electrode of the present invention and the fluid medium extends to the top and bottom of the measuring chamber, 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.

[0043] 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 a movable first baffle and a second baffle between the measuring chamber and the housing to achieve flow rate regulation. Since the present invention has little effect on the flow shape and the 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.

[0044] The present invention provides a method for improving the precision of micro flow control by setting a V-shaped or W-shaped groove in a vertical direction. The present invention sets V-shaped or W-shaped curves in a vertical direction and mutually engaged openings on the end faces of the first baffle and the second baffle. When the end faces of the first baffle and the second baffle are close, the flow area change rate of the flow channel is reduced due to the presence of the opening, so that the valve has higher sensitivity at the same baffle movement speed.

[0045] Therefore, compared with the prior art, the present invention has the following advantages:

[0046] 1) When the baffle moves to adjust the flow rate, the measuring chamber and the electrode are fixed, the flow channel at the inlet of the measuring chamber is fixed, and the flow shape will not change. The outlet of the measuring chamber is designed with a symmetrical taper indentation. The influence of the flow shape change on the measurement accuracy can be ignored, and high-precision flow measurement can be achieved.

[0047] 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;

[0048] 3) The baffle and the drive shaft form a reduction gear structure, which has a smaller driving torque than the valve stem drive, and the baffle is only subjected to thrust in the moving direction, so the movement is more stable and high-precision valve adjustment can be achieved;

[0049] 4) 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;

[0050] 5) High-precision synchronous flow velocity sampling is used as the feedback signal for flow regulation to achieve high-precision regulation of flow velocity.

[0051] 6) The V-shaped or W-shaped grooves set in the vertical direction improve the adjustment accuracy at small openings.

[0052] 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

[0053] Figure 1 It is a cross-sectional view of a first embodiment of the integrated flow measurement and regulation device of the split structure of the present invention.

[0054] In the figure, the outer shell 1, the left wall 2a of the measuring chamber, the right wall 2b of the measuring chamber, the first electrode 3a, the second electrode 3b, the first baffle 4a, the second baffle 4b, the first driving shaft 5a, the second driving shaft 5b, the first elastomer 8a, the second elastomer 8b, the flow channel inlet 10, the flow channel outlet 11, the first curve 12a, the second curve 12b, the first stop block 13a, the second stop block 13b, the first U-shaped groove 14a, the second U-shaped groove 14b, and the insulating gasket 16.

[0055] Figure 2 It is a cross-sectional view of a second embodiment of the integrated flow measurement and regulation device of the split structure of the present invention.

[0056] In the figure, the outer shell 1, the left wall 2a of the measuring chamber, the right wall 2b of the measuring chamber, the first electrode 3a, the second electrode 3b, the first baffle 4a, the second baffle 4b, the first driving shaft 5a, the second driving shaft 5b, the sealing gasket 6, the sealing bracket 7, the flow channel inlet 10, the flow channel outlet 11, the first stop block 13a, the second stop block 13b, the sealing ring 15, and the insulating gasket 16.

[0057] Figure 3 It is a cross-sectional view of a third embodiment of the integrated flow measurement and regulation device of the split structure of the present invention.

[0058] In the figure, the outer shell 1, the left wall 2a of the measuring chamber, the right wall 2b of the measuring chamber, the first electrode 3a, the second electrode 3b, the first baffle 4a, the second baffle 4b, the first drive shaft 5a, the second drive shaft 5b, the first elastomer 8a, the second elastomer 8b, the first pulley 9a, the second pulley 9b, the flow channel inlet 10, the flow channel outlet 11, the first stop block 13a, the second stop block 13b, and the insulating gasket 16.

[0059] Figure 4It is a cross-sectional view of a fourth embodiment of the integrated flow measurement and regulation device of the split structure of the present invention.

[0060] In the figure, the housing 1, the left wall 2a of the measuring chamber, the right wall 2b of the measuring chamber, the first electrode 3a, the second electrode 3b, the first baffle 4a, the second baffle 4b, the flow channel inlet 10, the flow channel outlet 11, and the insulating gasket 16. DETAILED DESCRIPTION

[0061] The present invention is further described below in conjunction with the accompanying drawings.

[0062] See also Figure 1 , which is a cross-sectional view of the first embodiment of the integrated flow measurement and regulation device with a split structure of the present invention.

[0063] This embodiment includes a housing 1, a left wall 2a of a measuring chamber, a right wall 2b of a measuring chamber, a first electrode 3a, a second electrode 3b, a first baffle 4a, a second baffle 4b, a first drive shaft 5a, a second drive shaft 5b, a first elastomer 8a, a second elastomer 8b, a flow channel inlet 10, a flow channel outlet 11, a first curve 12a, a second curve 12b, a first stop block 13a, a second stop block 13b, a first U-shaped groove 14a, a second U-shaped groove 14b, and an insulating gasket 16.

[0064] Inside the housing 1, a cylindrical cavity is formed connecting the flow channel inlet 10 and the flow channel outlet 11, wherein the fluid medium passes through the flow channel inlet 10, the cylindrical cavity, and the flow channel outlet 11 in sequence, and the cross-sections of the flow channel inlet 10 and the flow channel outlet 11 are rounded rectangles. The measuring cavity wall, electrodes, baffles, drive shafts, etc. in the cylindrical cavity are all arranged symmetrically according to the central axis of the flow channel. The left wall 2a of the measuring cavity is located on the left side of the cylindrical cavity, and the right wall 2b of the measuring cavity is located on the right side of the cylindrical cavity. The space between the left wall 2a of the measuring cavity and the right wall 2b of the measuring cavity forms a measuring cavity with a cross-section of a rounded rectangle, which is used to measure the flow of the fluid medium. The flow channel inlet 10, the measuring cavity, and the flow channel outlet 11 are smoothly connected in sequence, so that the flow shape of the fluid medium remains stable. The first electrode 3a is arranged on the left wall 2a of the measuring cavity in a vertical direction, and the second electrode 3b is arranged on the right wall 2b of the measuring cavity in a vertical direction. The contact surface between the electrode and the fluid medium is a vertical rectangle, and a large contact area is formed to reduce the noise caused by the impact of the fluid medium. The first electrode 3a and the second electrode 3b are injection molded with conductive plastic, and the left wall 2a and the right wall 2b of the measuring cavity are secondary injection molded with insulating plastic and electrodes, so that the electrodes and the measuring cavity wall are tightly combined to prevent water seepage. The housing 1 is made of conductive materials, such as stainless steel, conductive plastic, etc., to achieve electromagnetic shielding. An insulating gasket 16 is arranged at the bottom of the measuring cavity of this embodiment to prevent the electrode induced potential from being attenuated. The insulating gasket 16 is integrated with the measuring cavity wall, which can simplify the manufacturing process.

[0065] A first arc-shaped baffle 4a is provided between the housing 1 and the left wall 2a of the measuring cavity, and a first drive shaft 5a is provided at the same time. The outer arc surface of the first baffle 4a is consistent with the inner arc surface of the cylindrical cavity of the housing 1, and moves along the arc. An internal gear is provided in a partial area of ​​the inner arc surface of the first baffle 4a, and fits with the outer gear of the first drive shaft 5a. A first U-shaped groove 14a is provided in a partial area of ​​the outer arc surface of the first baffle 4a, and a first stopper 13a is provided at a corresponding position of the first U-shaped groove 14a in the cylindrical cavity of the housing 1, for limiting the moving position of the first baffle 4a. A second arc-shaped baffle 4b is provided between the housing 1 and the right wall 2b of the measuring cavity, and a second drive shaft 5b is provided at the same time. The outer arc surface of the second baffle 4b is consistent with the inner arc surface of the cylindrical cavity of the housing 1, and moves along the arc. An internal gear is provided in a partial area of ​​the inner arc surface of the second baffle 4b, and fits with the outer gear of the second drive shaft 5b. A second U-shaped groove 14b is provided in the outer arc surface area of ​​the second baffle 4b, and a second stopper 13b is provided in the cylindrical cavity of the housing 1 at the corresponding position of the second U-shaped groove 14b to limit the moving position of the second baffle 4b. With the central axis of the flow channel as the symmetry axis, the first baffle 4a and the second baffle 4b are arranged symmetrically, and the first drive shaft 5a and the second drive shaft 5b are also arranged symmetrically, and the modulus of the gears is consistent. When the first drive shaft 5a and the second drive shaft 5b rotate at the same speed and in opposite directions, the first baffle 4a and the second baffle 4b are driven to move, and the first baffle 4a and the second baffle 4b are kept in a symmetrical state, so that when the baffle moves, the change of the flow shape has the least effect on the flow measurement. When the first baffle 4a and the second baffle 4b move toward the flow channel outlet 11 to contact each other, the valve is in a closed state, and when the first baffle 4a and the second baffle 4b move toward the flow channel inlet 10 to be flush with the measuring cavity, the valve is in an open state.

[0066] The first baffle 4a is provided with a first elastic body 8a on the outer arc surface and end surface close to the flow channel outlet 11, and the cross section of the end surface is provided as a W-shaped first curve 12a; the second baffle 4b is provided with a second elastic body 8b on the outer arc surface and end surface close to the flow channel outlet 11, and the cross section of the end surface is provided as a W-shaped second curve 12b, and the first curve 12a and the second curve 12b are complementary curves to ensure that the first baffle 4a and the second baffle 4b are sealed when the valve is closed. The first elastomer 8a and the second elastomer 8b are made of thermoplastic elastomer material and are compounded to the baffle by a secondary injection molding process. When the valve is in a closed state, the end surfaces of the first baffle 4a and the second baffle 4b are in contact, and the outer side surface is in contact with the inner wall of the cavity of the shell 1, covering and sealing the flow channel outlet 11, thereby cutting off the flow channel. Since the flow channel inlet pressure is higher than the outlet pressure, the baffle can provide additional pressure on the shell, thereby obtaining better sealing. Since the first curve 12a and the second curve 12b are complementary W-shaped curves, when the baffle moves to a close fit, the flow channel presents a gradually decreasing S-shape, similar to the flow characteristics of an equal percentage control valve, thereby improving the sensitivity of valve adjustment. The W-shaped curve can be designed with different curve shapes according to the required flow adjustment characteristics.

[0067] The first drive shaft 5a and the second drive shaft 5b are driven by a stepper motor or a reduction motor and operate at a low speed to reduce the interference of the flow shape change on the measurement when the first baffle 4a and the second baffle 4b move, so that the flow rate can still be measured with high precision when the baffle moves. When the first baffle 4a and the second baffle 4b move, the flow rate of the fluid is measured at the same time as the feedback signal for adjusting the rotation speed of the first drive shaft 5a and the second drive shaft 5b, so that the flow rate can be adjusted with high precision. Figure 1 The first baffle 4a and the second baffle 4b shown are positions where the valve is at a certain opening, which is only an example of the valve position.

[0068] See also Figure 2 , which is a cross-sectional view of a second embodiment of the integrated flow measurement and regulation device with a split structure of the present invention.

[0069] This embodiment includes a housing 1, a left wall 2a of a measuring chamber, a right wall 2b of a measuring chamber, a first electrode 3a, a second electrode 3b, a first baffle 4a, a second baffle 4b, a first drive shaft 5a, a second drive shaft 5b, a sealing gasket 6, a sealing bracket 7, a flow channel inlet 10, a flow channel outlet 11, a first stop block 13a, a second stop block 13b, a sealing ring 15, and an insulating gasket 16.

[0070] Inside the housing 1, a cavity of approximately cylindrical shape connecting the flow channel inlet 10 and the flow channel outlet 11 is formed, wherein the fluid medium passes through the flow channel inlet 10, the cavity, and the flow channel outlet 11 in sequence, and the cross-sections of the flow channel inlet 10 and the flow channel outlet 11 are rectangular. The measuring cavity wall, electrodes, baffles, drive shafts, etc. in the cavity are arranged symmetrically about the central axis of the flow channel. The left wall 2a of the measuring cavity is located on one side of the cavity, and the right wall 2b of the measuring cavity is located on the other side of the cavity. The left wall 2a of the measuring cavity and the right wall 2b of the measuring cavity form a measuring cavity with a rectangular cross-section for flow measurement of the fluid medium. The flow channel inlet 10, the measuring cavity, and the flow channel outlet 11 are smoothly connected in sequence, so that the flow shape of the fluid medium remains stable. The first electrode 3a is arranged on the left wall 2a of the measuring cavity in a vertical direction, and the second electrode 3b is arranged on the right wall 2b of the measuring cavity in a vertical direction. The contact surface between the first electrode 3a and the second electrode 3b and the fluid medium is a vertical rectangle with a large contact area to reduce electrode noise. The left wall 2a and the right wall 2b of the measuring cavity are made of insulating plastic material, and the first electrode 3a and the second electrode 3b are made of metal. The housing 1 is made of metal, such as stainless steel, etc. At the same time, an insulating gasket 16 is arranged at the bottom of the measuring cavity of this embodiment to prevent the induced potential of the electrode from being attenuated.

[0071] A first arc-shaped baffle 4a is arranged between the housing 1 and the left wall 2a of the measuring chamber, and a first drive shaft 5a is also arranged. An internal gear is arranged on the inner arc surface of the first baffle 4a, and fits with the outer gear of the first drive shaft 5a. A second arc-shaped baffle 4b is arranged between the housing 1 and the right wall 2b of the measuring chamber, and a second drive shaft 5b is also arranged. An internal gear is arranged on the inner arc surface of the second baffle 4b, and fits with the outer gear of the second drive shaft 5b. The first baffle 4a and the second baffle 4b are arranged symmetrically, and can move toward the center of the flow channel under the drive of the drive shaft, thereby realizing the opening and closing of the valve. The first drive shaft 5a and the second drive shaft 5b rotate at the same speed and in opposite directions to ensure the symmetrical movement of the first baffle 4a and the second baffle 4b, so that the influence of the flow shape change on the flow measurement is minimized. The left wall 2a of the measuring chamber comprises a first stop block 13a near the flow channel inlet 10 for limiting the movement position of the first baffle 4a, and the right wall 2b of the measuring chamber comprises a second stop block 13b near the flow channel inlet 10 for limiting the movement position of the second baffle 4b.

[0072] The flow channel outlet 11 of the housing 1 is provided with an annular sealing gasket 6 with an intermediate column and a sealing bracket 7. The sealing bracket 7 is made of a material with high rigidity to provide support for the sealing gasket 6. The sealing gasket 6 is made of a thermoplastic elastomer material and is compounded to the sealing bracket 7 by an injection molding process to form a rigid-flexible composite sealing element. The outer side surfaces of the first baffle 4a and the second baffle 4b are in contact with the sealing gasket 6. Relying on the elastic properties of the sealing gasket 6 material, the first baffle 4a and the second baffle 4b are sealed with the housing 1, and the first baffle 4a and the second baffle 4b are sealed with the left wall 2a and the right wall 2b of the measuring chamber. When the first baffle 4a and the second baffle 4b approach the center of the flow channel, they fit with the intermediate column of the annular sealing gasket 6. At the same time, by utilizing the characteristic that the inlet pressure of the fluid medium is greater than the outlet pressure, the first baffle 4a and the second baffle 4b are further pressed against the annular sealing gasket 6 to achieve complete closure of the valve. An annular sealing ring 15 is provided at the flow channel inlet 10 of the housing 1 to provide a seal between the housing 1 and the measuring chamber wall to prevent the fluid medium from forming a flow channel outside the measuring chamber and affecting the flow measurement accuracy. At the same time, relying on the sealing gasket 6 and the sealing ring 15, the first drive shaft 5a and the second drive shaft 5b are sealed in the rotation space, which is beneficial to prevent foreign matter from entering the rotation space and improve the reliability of valve movement.

[0073] The first drive shaft 5a and the second drive shaft 5b use a stepper motor or a reduction motor and operate at a low speed to reduce the interference of the flow shape on the measurement when the first baffle 4a and the second baffle 4b move, so that the flow rate can be measured with high precision. When the first baffle 4a and the second baffle 4b move, the flow velocity of the fluid is measured at the same time as the feedback signal for adjusting the rotation speed of the first drive shaft 5a and the second drive shaft 5b, so that the flow velocity can be adjusted with high precision. Figure 2 The first baffle 4a and the second baffle 4b shown are positions where the valve is at a certain opening, which is only an example of the valve position.

[0074] See also Figure 3 , which is a cross-sectional view of a third embodiment of the integrated flow measurement and regulation device with a split structure of the present invention.

[0075] This embodiment includes a housing 1, a left wall 2a of a measuring chamber, a right wall 2b of a measuring chamber, a first electrode 3a, a second electrode 3b, a first baffle 4a, a second baffle 4b, a first drive shaft 5a, a second drive shaft 5b, a first elastomer 8a, a second elastomer 8b, a first pulley 9a, a second pulley 9b, a flow channel inlet 10, a flow channel outlet 11, a first stop block 13a, a second stop block 13b, and an insulating gasket 16.

[0076] Inside the housing 1, a cylindrical cavity is formed connecting the flow channel inlet 10 and the flow channel outlet 11, wherein the fluid medium passes through the flow channel inlet 10, the cylindrical cavity, and the flow channel outlet 11 in sequence, and the cross-sections of the flow channel inlet 10 and the flow channel outlet 11 are rounded rectangles. The measuring cavity wall, electrodes, baffles, drive shafts, pulleys, etc. in the cylindrical cavity are arranged symmetrically about the central axis of the flow channel. The left wall 2a of the measuring cavity is located on the left side of the cylindrical cavity, and the right wall 2b of the measuring cavity is located on the right side of the cylindrical cavity. The space between the left wall 2a of the measuring cavity and the right wall 2b of the measuring cavity forms a measuring cavity with a rounded rectangle cross-section, which is used to measure the flow rate of the fluid medium. The flow channel inlet 10, the measuring cavity, and the flow channel outlet 11 are smoothly connected in sequence, so that the flow shape of the fluid medium remains stable. The first electrode 3a is arranged vertically on the left wall 2a of the measuring cavity, and the second electrode 3b is arranged vertically on the right wall 2b of the measuring cavity, and they are arranged symmetrically. The contact surface between the first electrode 3a and the second electrode 3b and the fluid medium is a vertical rectangle with a large contact area to reduce the electrode noise caused by the fluid impact. The measuring cavity wall is made of insulating plastic, and the first electrode 3a and the second electrode 3b are made of conductive plastic. The insulating plastic and the conductive plastic of this embodiment use the same substrate and are manufactured by a secondary injection molding process to ensure the sealing between the two, so as to facilitate the transmission of electrode signals. Secondary injection molding is a commonly used injection molding process. In this embodiment, the electrode parts are first formed by a conventional injection molding process, and then the electrode parts are used as inserts for a second injection molding to form the entire measuring cavity. Using the same substrate is conducive to increasing the bonding degree of the two parts. In order to reduce the interference of external electromagnetic signals on the electrode signals and simplify the manufacturing process, the housing 1 of this embodiment is made of conductive plastic. An insulating gasket 16 is arranged at the bottom of the measuring cavity of this embodiment to prevent the electrode induced potential from being attenuated. The insulating gasket 16 is integrated with the measuring cavity wall to simplify the manufacturing process.

[0077] A first arc-shaped baffle 4a is arranged between the housing 1 and the left wall 2a of the measuring chamber, and a first drive shaft 5a is arranged on the outer side of the first baffle 4a, and a first pulley 9a is arranged on the inner side. A first elastic body 8a is arranged on the outer arc surface of the first baffle 4a near the flow channel outlet 11, and an external gear is arranged near the flow channel inlet 10, and the gears of the external gear and the first drive shaft 5a are matched; a second arc-shaped baffle 4b is arranged between the housing 1 and the right wall 2b of the measuring chamber, and a second drive shaft 5b is arranged on the outer side of the second baffle 4b, and a second pulley 9b is arranged on the inner side, and a second elastic body 8b is arranged on the outer arc surface of the second baffle 4b near the flow channel outlet 11, and an external gear is arranged near the flow channel inlet 10, and the gears of the external gear and the second drive shaft 5b are matched. The outer arc lines of the first baffle 4a and the second baffle 4b are consistent with the arc lines of the cylindrical cavity of the housing 1, and can move along the arc lines. The housing 1 is provided with a protruding stop block on both sides near the flow channel inlet 10, the first stop block 13a and the second stop block 13b, which are used for limiting the movement of the first baffle 4a and the second baffle 4b. The first baffle 4a and the second baffle 4b are arranged symmetrically and can move symmetrically under the drive of the drive shaft, so as to realize the opening and closing of the valve. The first drive shaft 5a and the second drive shaft 5b have the same module. When the shaft rotates at the same speed and in opposite directions, the symmetrical movement of the first baffle 4a and the second baffle 4b can be ensured, so that the influence of the change of the flow shape on the flow measurement is minimized. In order to ensure that the first baffle 4a and the second baffle 4b move along the arc and ensure the stable fitting of the first drive shaft 5a and the second drive shaft 5b, the first pulley 9a and the second pulley 9b are provided in this embodiment for limiting the movement of the first baffle 4a and the second baffle 4b. The first pulley 9a and the second pulley 9b can rotate to reduce the friction when the baffle moves.

[0078] The first elastic body 8a and the second elastic body 8b are made of thermoplastic elastomer material and are respectively compounded to the first baffle 4a and the second baffle 4b by injection molding process to form a rigid-flexible composite sealing element. The first elastic body 8a and the second elastic body 8b are in contact with the housing 1, and rely on the elastic properties of the material to provide sealing between the first baffle 4a and the second baffle 4b and the housing 1, and between the first baffle 4a and the second baffle 4b.

[0079] The first drive shaft 5a and the second drive shaft 5b use a stepper motor or a reduction motor and operate at a low speed to reduce the interference of the flow shape on the measurement when the first baffle 4a and the second baffle 4b move, so that the flow rate can be measured with high precision. When the first baffle 4a and the second baffle 4b move, the flow velocity of the fluid is measured at the same time as the feedback signal for adjusting the rotation speed of the first drive shaft 5a and the second drive shaft 5b, so that the flow velocity can be adjusted with high precision. Figure 3The first baffle 4a and the second baffle 4b shown are positions where the valve is at a certain opening, which is only an example of the valve position.

[0080] See also Figure 4 , which is a cross-sectional view of the fourth embodiment of the integrated flow measurement and regulation device with a split structure of the present invention.

[0081] This embodiment includes a housing 1 , a left wall 2 a of the measuring chamber, a right wall 2 b of the measuring chamber, a first electrode 3 a , a second electrode 3 b , a first baffle 4 a , a second baffle 4 b , a flow channel inlet 10 , a flow channel outlet 11 , and an insulating gasket 16 .

[0082] Inside the housing 1, an approximately cubic cavity connecting the flow channel inlet 10 and the flow channel outlet 11 is formed, wherein the fluid medium passes through the flow channel inlet 10, the cavity, and the flow channel outlet 11 in sequence, and the cross-sections of the flow channel inlet 10 and the flow channel outlet 11 are rounded rectangles. The measuring cavity wall, electrodes, baffles, etc. in the cavity are arranged symmetrically about the central axis of the flow channel. The left wall 2a of the measuring cavity is located on the left side of the cavity, and the right wall 2b of the measuring cavity is located on the right side of the cavity. The space between the left wall 2a of the measuring cavity and the right wall 2b of the measuring cavity forms a measuring cavity with a cross-section of a rounded rectangle, which is used to measure the flow rate of the fluid medium. The flow channel inlet 10, the measuring cavity, and the flow channel outlet 11 are smoothly connected in sequence, so that the flow shape of the fluid medium remains stable. The first electrode 3a is arranged vertically on the left wall 2a of the measuring cavity, and the second electrode 3b is arranged vertically on the right wall 2b of the measuring cavity. The contact surface between the electrode and the fluid medium is a vertical rectangle, and a large contact area is formed to reduce the noise caused by the impact of the fluid medium. The first electrode 3a and the second electrode 3b are formed by injection molding of conductive plastic, and the left wall 2a and the right wall 2b of the measuring cavity are formed by insulating plastic, and the electrodes are subjected to secondary injection molding, so that the electrodes and the measuring cavity wall are closely combined to prevent water from seeping outward from the electrode position. The housing 1 is made of conductive materials, such as stainless steel, conductive plastic, etc., to achieve electromagnetic shielding. An insulating gasket 16 is arranged at the bottom of the measuring cavity of this embodiment to prevent the electrode induced potential from being attenuated. The insulating gasket 16 is integrated with the measuring cavity wall, which can simplify the manufacturing process.

[0083] A first baffle 4a is provided on the left side of the flow channel outlet 11 of the housing 1, and one end of the first baffle 4a close to the left wall 2a of the measuring chamber can rotate, thereby driving the other end to move. A second baffle 4b is provided on the right side of the flow channel outlet 11 of the housing 1, and one end of the second baffle 4b close to the right wall 2b of the measuring chamber can rotate, thereby driving the other end to move. The first baffle 4a and the second baffle 4b are arranged symmetrically, and can move toward the center of the flow channel when rotating, thereby realizing the opening and closing of the valve. If the moving speeds of the first baffle 4a and the second baffle 4b are the same, the symmetrical state of the baffles can be maintained, so that the influence of the flow shape change when the valve is opened and closed on the flow measurement is minimized.

[0084] The first baffle 4a and the second baffle 4b use a stepper motor or a reduction motor and operate at a low speed to reduce the interference of the flow shape when the first baffle 4a and the second baffle 4b move on the measurement, so that the flow rate can be measured with high precision. When the first baffle 4a and the second baffle 4b move, the flow velocity of the fluid is measured at the same time as the feedback signal for adjusting the rotation speed, so that the flow velocity can be adjusted with high precision. Figure 4 The first baffle 4a and the second baffle 4b shown are positions where the valve is at a certain opening, which is only an example of the valve position.

[0085] The present embodiment is an integrated flow measurement and regulation device with a split structure. The inner cavity of the shell is cylindrical or approximately cylindrical, and the baffle is in an arc shape that is consistent with or approximately the arc surface of the cylinder to reduce the size of the valve body. This is only an optimized arrangement. The inner cavity of the shell of the present embodiment is approximately a cube, and the baffle is in a wedge shape. Although it increases the volume of the valve, it can further reduce the impact of flow shape changes, which is another optimized arrangement. The use of an arc that is approximately a straight line is also a method of reducing the impact of the flow shape and reducing the volume. It 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.

[0086] The present embodiment is an integrated flow measurement and regulation device with a split structure. The inner cavity of the shell is cylindrical, approximately cylindrical, and approximately cubic. It can also be designed to be conical and cubical to facilitate sealing and assembly. These changes in shape 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 scope of protection of the present invention.

[0087] The present embodiment is an integrated flow measurement and regulation device with a split structure. In order to ensure the movement of the baffle, a pulley mechanism is provided. Limiting mechanisms such as guide rails and sliders may be further provided. The provision of these limiting mechanisms does not affect the substantial performance of the device and is a technology well known to those skilled in the art. Such situations also fall within the scope of protection of the present invention.

[0088] The present embodiment is an integrated flow measurement and regulation device with a split structure, which uses a gear fitting method to drive the movement of the baffle, and may also use other driving methods such as a push rod, a connecting rod, a rocker arm, etc. The settings of these mechanisms do not affect the substantial 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.

[0089] This embodiment is an integrated flow measurement and regulation device with a split structure, one end of the baffle moves along an arc toward the central axis of the flow channel, and the other end also moves or rotates along the same arc. The movement of the baffle can also be designed to move toward the central axis of the flow channel along other paths, and one end and the other end of the baffle can move along different paths. The setting of these mechanisms does not affect the flow measurement and regulation characteristics of the 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.

[0090] The present embodiment is an integrated flow measurement and regulation device with a split structure. A symmetrical arrangement is adopted in the cavity only to achieve the best flow measurement accuracy. An asymmetrical arrangement may also be adopted to also meet the flow measurement requirements of a certain accuracy. The design of such an asymmetrical flow channel only has a certain impact on the flow measurement accuracy, but does not affect the ability of the device to improve the flow measurement accuracy. 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.

[0091] The present embodiment is an integrated flow measurement and regulation device with a split structure, wherein the electrodes are made of metal material or conductive plastic, or 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 lead-out is made of conductive plastic to achieve sealing of the electrode. This technology is a public technology and is well known to those skilled in the art, and such situations are also within the scope of protection of the present invention.

[0092] The present embodiment is an integrated flow measurement and regulation device with a split structure. The end face in contact with the baffle adopts a W-shaped curve, and can also be other types of curves to achieve various flow regulation characteristics. 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.

[0093] The present embodiment is an integrated flow measurement and regulation device with a split structure, 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.

[0094] The present embodiment is an integrated flow measurement and regulation device with a split structure, which does not include the technology for electrode signal extraction. The relevant electrode signal extraction 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.

[0095] The present embodiment is an integrated flow measurement and regulation device with a split structure, which does not include the structure of the upper cover part of the measuring chamber. The mechanism of the upper cover part of the measuring chamber 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.

[0096] The present embodiment is an integrated flow measurement and regulation device with a split structure, 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.

[0097] The present embodiment is an integrated flow measurement and regulation device with a split structure. The baffle moves or rotates in the horizontal direction, and the baffle can also move or rotate in the vertical 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 device and are technologies well known to those skilled in the art. Such situations are also within the protection scope of the present invention.

[0098] The present embodiment is an integrated flow measurement and regulation device with a split structure, 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 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.

[0099] The present embodiment is an integrated flow measurement and regulation device with a split structure. 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 scope of protection of the present invention.

[0100] 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. An integrated flow measurement and regulation device with a split structure, characterized in that: The invention comprises a housing (1), a left wall (2a) of the measuring cavity, a right wall (2b) of the measuring cavity, a first electrode (3a), a second electrode (3b), a first baffle (4a), a second baffle (4b), a flow channel inlet (10), and a flow channel outlet (11); the housing (1) forms a cavity connecting the flow channel inlet (10) and the flow channel outlet (11); the left wall (2a) of the measuring cavity is located on one side of the cavity and is fixed; the right wall (2b) of the measuring cavity is located on the other side of the cavity and is fixed; the space between the left wall (2a) of the measuring cavity and the right wall (2b) of the measuring cavity forms a measuring cavity; the measuring cavity is connected to the flow channel inlet of the housing (1). The measuring cavity has a first opening (10) and a flow channel outlet (11), thereby forming a flow channel through which a fluid medium passes; a first electrode (3a) is arranged on the left wall (2a) of the measuring cavity, and a second electrode (3b) is arranged on the right wall (2b) of the measuring cavity; the first electrode (3a) and the second electrode (3b) 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 first baffle (4a) is arranged on one side close to the flow channel outlet (11), and a movable second baffle (4b) is arranged on the other side close to the flow channel outlet (11); the housing (1) is made of a conductive material, including metal or conductive plastic; The left wall (2a) and the right wall (2b) of the measuring cavity are made of insulating plastic, the first electrode (3a) and the second electrode (3b) are made of conductive plastic, and the insulating plastic and the conductive plastic are tightly combined by a secondary injection molding process.

2. The integrated flow measurement and regulation device of a split structure as claimed in claim 1, characterized in that: The left wall (2a) and right wall (2b) of the measuring chamber, the first electrode (3a) and the second electrode (3b), the first baffle (4a) and the second baffle (4b) are all symmetrically distributed along the central axis of the flow channel, so as to facilitate high-precision measurement of the flow rate.

3. The integrated flow measurement and regulation device of a split structure as claimed in claim 1, characterized in that: One end of the first baffle (4a) and the second baffle (4b) can move toward the central axis of the flow channel, and the other end can move, thereby adjusting the flow area of ​​the flow channel.

4. The integrated flow measurement and regulation device of a split structure as claimed in claim 1, characterized in that: The movement trajectories of the first baffle (4a) and the second baffle (4b) are symmetrical arcs.

5. The integrated flow measurement and regulation device of a split structure as claimed in claim 1, characterized in that: A first drive shaft (5a) and a second drive shaft (5b) are arranged between the measuring cavity and the housing (1); when the first drive shaft (5a) rotates, it pushes the first baffle (4a) to move; when the second drive shaft (5b) rotates, it pushes the second baffle (4b) to move.

6. The integrated flow measurement and regulation device of a split structure as claimed in claim 5, characterized in that: The first drive shaft (5a) and the first baffle plate (4a) are provided with gears meshing with each other, and the second drive shaft (5b) and the second baffle plate (4b) are provided with gears meshing with each other.

7. The integrated flow measurement and regulation device of a split structure as claimed in claim 1, characterized in that: The flow channel outlet (11) of the housing (1) is provided with an annular sealing gasket (6), and the contact surfaces between the sealing gasket (6) and the first baffle plate (4a) and the second baffle plate (4b) are provided with elastic sealing material, wherein the elastic sealing material comprises a thermoplastic elastomer, so as to enhance the sealing performance of the first baffle plate (4a) and the second baffle plate (4b) relative to the housing (1).

8. An integrated flow measurement and regulation device with a split structure as claimed in claim 1 or 7, characterized in that: A vertical column (7) is further provided in the middle of the flow channel outlet (11) of the housing (1), and elastic sealing material is arranged on the contact surface between the column (7) and the first baffle (4a) and the second baffle (4b) to enhance the sealing performance between the first baffle (4a) and the second baffle (4b).

9. The integrated flow measurement and regulation device of a split structure as claimed in claim 1, characterized in that: The first baffle (4a) is provided with a first elastic body (8a) on a surface of one side close to the flow channel outlet (11); the second baffle (4b) is provided with a second elastic body (8b) on a surface of one side close to the flow channel outlet (11); the first elastic body (8a) and the second elastic body (8b) are made of elastic sealing material to facilitate sealing after the baffle is closed.

10. The integrated flow measurement and regulation device of a split structure as claimed in claim 9, characterized in that: The first elastic body (8a) is attached to the surface of the first baffle (4a) by using a secondary injection molding process; the second elastic body (8b) is attached to the surface of the second baffle (4b) by using a secondary injection molding process.

11. The integrated flow measurement and regulation device of a split structure as claimed in claim 1, characterized in that: The end surfaces of the first baffle plate (4a) and the second baffle plate (4b) that contact each other are provided with a first curve (12a) and a second curve (12b) having W-shaped or V-shaped characteristics in cross section, forming a V-shaped or W-shaped opening in a vertical direction, so as to improve the flow regulation characteristics under a small opening degree.

12. The integrated flow measurement and regulation device of a split structure as claimed in claim 1, characterized in that: A protruding first stop block (13a) is provided on one side surface of the cavity of the shell (1), a first U-shaped groove (14a) is provided on the outer side of the first baffle (4a), the first stop block (13a) is located in the first U-shaped groove (14a), and is used to limit the position of the first baffle (4a) when it moves; a protruding second stop block (13b) is provided on the other side surface of the cavity of the shell (1), a second U-shaped groove (14b) is provided on the outer side of the second baffle (4b), the second stop block (13b) is located in the second U-shaped groove (14b), and is used to limit the position of the second baffle (4b) when it moves.

13. The integrated flow measurement and regulation device of a split structure as claimed in claim 1, characterized in that: The cavity of the housing (1) is provided with a protruding first stop block (13a) on one side surface close to the flow channel inlet (10) for limiting the position of the first baffle plate (4a) when it moves; and a protruding second stop block (13b) is provided on the other side surface close to the flow channel inlet (10) for limiting the position of the second baffle plate (4b) when it moves.

14. The integrated flow measurement and regulation device of a split structure as claimed in claim 1, characterized in that: The left wall (2a) of the measuring chamber is provided with a protruding first stop block (13a) on the outer side close to the flow channel inlet (10) for limiting the position of the first baffle plate (4a) when it moves; the right wall (2b) of the measuring chamber is provided with a protruding second stop block (13b) on the outer side close to the flow channel inlet (10) for limiting the position of the second baffle plate (4b) when it moves.

15. The integrated flow measurement and regulation device of a split structure as claimed in claim 1, characterized in that: The vertical height of the contact surface between the first electrode (3a) and the second electrode (3b) and the fluid medium is greater than the horizontal width, so as to reduce electrode noise and facilitate high-precision measurement of flow.

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