CN116772953A - Mass flowmeter and measuring system thereof - Google Patents
Mass flowmeter and measuring system thereof Download PDFInfo
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- CN116772953A CN116772953A CN202210422846.9A CN202210422846A CN116772953A CN 116772953 A CN116772953 A CN 116772953A CN 202210422846 A CN202210422846 A CN 202210422846A CN 116772953 A CN116772953 A CN 116772953A
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Abstract
The invention discloses a mass flowmeter and a measuring system thereof, which relate to the field of mass flowmeters and comprise a mass flowmeter device, wherein a quantitative pressing-in box is arranged for solving the problem of small precision in flow regulation of the mass flowmeter, when the rotation precision of a driving shaft is required to be realized, a group of piston heads can be pressed into the bottom of a compression cavity by a pushing unit, so that fluid filling media stored in the compression cavity are pressed into a sixty-degree annular groove, the volume of the fluid filling media in the sixty-degree annular groove is far greater than the volume of the fluid filling media pressed into the sixty-degree annular groove, therefore, the pressed fluid filling media in the sixty-degree annular groove only pushes a movable plate to rotate at an accurate value angle below seconds, and the movable plate and the driving shaft synchronously rotate, thereby realizing the rotation of the driving shaft at an accurate value angle below seconds, realizing the purpose of high-precision regulation of the opening size of an annular notch, and further accurately regulating the flow in the flowmeter.
Description
Technical Field
The invention relates to the field of mass flow meters, in particular to a mass flow meter and a measuring system thereof.
Background
Mass flowmeter, the volume of fluid is a function of fluid temperature and pressure, is a dependent variable, and the mass of fluid is a quantity that does not change over time, space temperature, pressure. As described above, among commonly used flow meters, flow measurement values such as an orifice plate flow meter, a laminar flow mass flow meter, a turbine flow meter, a vortex shedding flow meter, an electromagnetic flow meter, a rotameter, an ultrasonic flow meter, an elliptical gear flow meter, and the like are volume flow rates of fluids. The amount of fluid involved in scientific research, process control, quality management, economic accounting, and trade delivery activities is generally mass. Measuring only the volumetric flow rate of a fluid using such a flow meter often fails to meet human requirements and it is often desirable to try to obtain a mass flow rate of the fluid. In the past, the quality of the fluid can only be indirectly obtained through correction, conversion, compensation and other methods after measuring parameters such as temperature, pressure, density, volume and the like of the fluid. The measuring method has a plurality of intermediate links, and the accuracy of mass flow measurement is difficult to ensure and improve. With the development of modern science and technology, several metering methods and devices for directly measuring mass flow rate are developed in succession, so that the progress of the flow measurement technology is promoted.
But the mass flowmeter cannot further reduce the accuracy of flow regulation during actual use. Therefore, it is necessary to invent a mass flowmeter and a measuring system thereof to solve the above problems.
Disclosure of Invention
The present invention is directed to a mass flowmeter and a measuring system thereof, which solve the problems set forth in the background art.
In order to achieve the above purpose, the present invention provides the following technical solutions: the mass flowmeter comprises a mass flowmeter device, wherein the mass flowmeter device comprises a driving box and a driving shaft, a stress mechanism is arranged in the driving box, the stress mechanism comprises a movable plate, the movable plate is fixed on the outer ring of the driving shaft, a rubber sealing gasket is fixedly arranged at one end of the movable plate, which is far away from the driving shaft, and is in sealing fit with the inner wall of the driving box;
the upper end of the driving box is provided with a discharge pipeline, a first control valve is arranged in the discharge pipeline, and one side of the driving box is provided with an output assembly.
Preferably, the output assembly comprises a matching box fixed on one side of the driving box, an inlet pipeline is arranged at the end part of the matching box, a second control valve is arranged in the inlet pipeline, an annular notch is arranged on one side, close to the matching box, of the driving box, the annular notch is distributed along the moving direction of the movable plate, and the annular notch is communicated between the three hundred-degree annular groove and the inside of the matching box.
In order to solve the problem of small precision in flow regulation of a mass flowmeter, a quantitative pressing-in box is arranged, the diameter of a compression cavity in the quantitative pressing-in box is smaller, the capacity of a sixty-degree annular groove is fifty to five hundred times larger than that in the compression cavity, when the rotation precision of a driving shaft below seconds is required to be realized, a group of piston heads can be pressed into the bottom of the compression cavity by using a pushing unit, so that fluid filling media stored in the compression cavity are pressed into the sixty-degree annular groove, the capacity in the sixty-degree annular groove is far larger than the volume of the fluid filling media pressed in the part, therefore, the part of fluid filling media pressed in the sixty-degree annular groove only pushes a movable plate to rotate at an accurate value angle below seconds, and the movable plate and the driving shaft rotate synchronously, so that the driving shaft rotates at an accurate value angle below seconds, the purpose of high-precision regulation of the opening size of an annular notch is realized, and the flow in the flowmeter is more accurately regulated.
It should be noted that, in order to solve the phenomenon that the rotation precision is low in the mechanical rotation process, a quantitative pressing-in box is provided, the diameter of a compression cavity in the quantitative pressing-in box is smaller, the capacity of a sixty-degree annular groove is fifty times to five hundred times larger than the capacity in the compression cavity, when the rotation precision below the second of a driving shaft is required to be achieved, a group of piston heads can be pressed into the bottom of the compression cavity by using a pushing unit, so that the fluid filling medium stored in the compression cavity is pressed into the sixty-degree annular groove, the capacity in the sixty-degree annular groove is far larger than the volume of the fluid filling medium pressed into the sixty-degree annular groove, therefore, the part of the fluid filling medium pressed into the sixty-degree annular groove only pushes a movable plate to rotate at an accurate value angle below the second, and the movable plate and the driving shaft rotate synchronously, so that the driving shaft rotates at an accurate value angle below the second is achieved.
The pushing unit can use an electric push rod, an air cylinder and the like.
Preferably, the middle top surface of the matching box is fixedly welded with a vertical middle partition plate, a lower gap is arranged between the lower end of the vertical middle partition plate and the bottom of the matching box, and an eliminating plate is arranged between one far side of the vertical middle partition plate and the inner wall of the matching box.
Further, the mass flowmeter device itself enters liquid through the entering pipeline, the liquid enters the annular notch from the position of the lower gap after defoaming at the eliminating plate, the liquid entering the annular notch does not contain foam or has little foam content, the liquid passing through the annular notch eliminates the influence of air bubbles to reduce the purpose of flow metering accuracy, that is, the liquid passing through the face area in the annular notch does not contain air bubbles and is compact, and the inlet amount of the liquid can be accurately controlled.
Preferably, the eliminating plate is provided with a plurality of groups of honeycomb through holes, the matching box above the eliminating plate is integrally provided with an exhaust pipeline, a third control valve is arranged in the exhaust pipeline, and the exhaust pipeline is communicated with the inside of the matching box at one side of the vertical middle partition plate.
Specifically, the bubbles are filtered out from the liquid through a plurality of groups of honeycomb holes, the bubbles are accumulated above the eliminating plate, the third control valve is opened periodically, so that the bubbles are released from the exhaust pipeline, and the third control valve, the second control valve and the first control valve can all use devices such as electromagnetic valves.
The invention also discloses a measuring system of the mass flowmeter, which is suitable for the mass flowmeter, and comprises a measuring and adjusting device, wherein the measuring and adjusting device comprises a quantitative pressing-in box, a centralized cavity is arranged at the bottom of the quantitative pressing-in box, a fluid filling medium which is pressed into the driving box to push the driving shaft to rotate relative to the axis of the driving shaft to be an axis is stored in the centralized cavity, a compression cavity penetrating through the upper surface of the driving shaft is also arranged in the quantitative pressing-in box, the bottom of the compression cavity is communicated with the centralized cavity, a piston head is movably arranged at the upper end of the compression cavity, an inverted L-shaped supporting plate is fixedly welded at the top of the quantitative pressing-in box, a pushing unit for pushing the piston head to move downwards along the compression cavity is welded at the top of the supporting plate, the end part of the fluid filling medium is communicated with the inside of the driving box through a communicating pipe, and sixty-degree annular grooves, the communicating pipe, the centralized cavity and the compression cavity are filled with the fluid filling medium.
Specifically, the rubber sealing gasket at the end part of the movable plate is always attached and sealed between the inner wall of the driving box and the movable plate through the magnetic attraction piece, so that the sealing performance is strong.
Preferably, the compression chambers are provided with a plurality of groups at equal distances in the quantitative pressing box.
The compression cavity is provided with a plurality of groups, so that fluid filling media in the plurality of groups of compression cavities are conveniently pressed into the sixty-degree annular groove simultaneously when the driving shaft is required to be rotated in a large range, the driving shaft can be rotated in a large range once, then the driving shaft is accurately regulated, and the fluid filling media can be water and other media.
Preferably, the piston head has a circular plate-like structure.
Preferably, the reset mechanism is arranged in the three hundred degree ring grooves, the reset mechanism comprises a guide telescopic rod, a sliding block, a guide cylinder and a reset spring, the guide telescopic rod is of an arc rod-shaped structure, the guide cylinder is of an arc tubular structure, the sliding block is fixed at one end of the guide telescopic rod, the other end of the guide telescopic rod is fixed on the inner wall of one side of the movable plate, which is far away from the fixed plate, of the movable plate, the sliding block is movably telescopic in the guide cylinder, one end of the guide cylinder, which is far away from the sliding block, is fixed on the inner wall of the fixed plate, and the sliding block which pushes the sliding block to rotate towards one side of the guide telescopic rod is fixedly welded at the bottom end of the guide cylinder, and the guide cylinder and the driving shaft are coaxial.
When the driving shaft needs to be reset, the corresponding piston head is moved to the upper part of the compression cavity, at the moment, the fluid filling medium in the sixty-degree annular groove is released, the reset spring can push the sliding block to move towards the direction of the guiding telescopic rod, so that the movable plate and the driving shaft are reset, and the reset spring is in a compressed state when the sixty-degree annular groove is at the sixty-degree angle.
Preferably, one side of the driving box is provided with a stabilizing mechanism, the stabilizing mechanism comprises a stabilizing cylinder integrally arranged on the side surface of the driving box, a round hole which is communicated with the inside of the driving box and is used for the end part of the driving shaft to movably extend in is formed in the stabilizing cylinder, a guide adjusting groove is formed in the side surface and the bottom of the round hole, a pressing block is movably arranged in the guide adjusting groove in a sliding manner, balls which are movably attached to the periphery and the end surface of the driving shaft are movably inlaid on the pressing block, a compression screw is further connected onto the stabilizing cylinder through threaded fit, one end of the compression screw is located outside the stabilizing cylinder, and the other end of the compression screw is movably attached to one surface of the pressing block, which is far away from the balls.
It should be noted that, in order to increase the stability when the drive shaft rotates, be provided with steady cylinder in the one end of driving box, the drive shaft is located the tip side and the terminal surface of round hole and is pressed together by the ball all the time, both guaranteed the steady rotation of drive shaft, restricted the drive shaft again and not produced eccentric phenomenon, when drive shaft or ball wearing and tearing, rotate and screw hold-down screw and can promote the briquetting and remove towards the drive shaft, thereby it is steady to carry out the maintenance once more, make things convenient for the continuation of drive shaft to maintain steadily, and the briquetting can adopt the magnetic block, direction adjustment tank inner wall can adopt the stainless steel face, the briquetting adsorbs to fix in the direction adjustment tank, be convenient for fix.
Preferably, the driving box is cylindrical shell structure, the driving shaft is coaxial with the driving box, the driving shaft is movably arranged at the axis position of the driving box, one end of the driving shaft, which is far away from the round hole, is movably extended out of the driving box, a sealing mechanism is arranged on the driving shaft, the sealing mechanism comprises a first rubber sealing ring and a second rubber sealing ring which are fixed on the outer ring of the driving shaft, a first magnetic suction plate which is adsorbed and fixed on the inner wall of the driving box is arranged in the first rubber sealing ring, the first rubber sealing ring is sealed at the position inside the driving box through the round hole, rubber covered edges which are covered and attached on the inner surface and the outer surface of the driving box are respectively integrally arranged on two sides of the outer ring of the second rubber sealing ring, a second magnetic suction plate is fixedly arranged in the rubber covered edges, and the second magnetic suction plates in the two groups of the rubber covered edges are mutually adsorbed and fixed.
The first rubber sealing ring is adsorbed and fixed on the inner wall of the driving box through the first magnetic suction plate, so that the driving box is convenient to seal between the round hole and the inner wall of the driving box in real time, and the second magnetic suction plates in the two groups of rubber covered edges are mutually adsorbed and fixed, so that the driving shaft can be conveniently and movably limited and sealed at the position where the driving shaft penetrates out of the driving box;
in the equipment, the drive shaft passes the position of joining in marriage the case and passes through movable rubber circle sealing connection, and guarantees that the drive shaft can normally rotate, and both sides all pass through rubber seal gasket fixed connection around between fly leaf and the fixed plate, and communicating pipe intercommunication is two sets of rubber seal gasket's inside around, and two sets of rubber seal gasket block both sides around fluid filling medium.
The invention has the technical effects and advantages that:
1. in order to solve the problem of small precision in flow regulation of the mass flowmeter, the quantitative pressing-in box is arranged, the diameter of a compression cavity in the quantitative pressing-in box is smaller, the capacity of a sixty-degree annular groove is fifty to five hundred times larger than the capacity in the compression cavity, when the rotation precision of a driving shaft below seconds is required to be realized, a group of piston heads can be pressed into the bottom of the compression cavity by using a pushing unit, so that a fluid filling medium stored in the compression cavity is pressed into the sixty-degree annular groove, the capacity in the sixty-degree annular groove is far larger than the volume of the part of the pressed fluid filling medium, therefore, the part of the pressed fluid filling medium in the sixty-degree annular groove only pushes a movable plate to rotate at an accurate value angle below seconds, and the movable plate and the driving shaft synchronously rotate, so that the driving shaft rotates at an accurate value angle below seconds, the purpose of high-precision adjustment of the opening size of an annular notch is realized, and the flow in the flowmeter is more precisely adjusted;
2. in order to solve the problem of low rotation precision in the mechanical rotation process, the quantitative pressing-in box is arranged, the diameter of a compression cavity in the quantitative pressing-in box is smaller, the capacity of a sixty-degree annular groove is fifty to five hundred times larger than the capacity in the compression cavity, when the rotation precision of a driving shaft below seconds is required to be realized, a group of piston heads can be pressed into the bottom of the compression cavity by using a pushing unit, so that fluid filling media stored in the compression cavity are pressed into the sixty-degree annular groove, the capacity in the sixty-degree annular groove is far larger than the volume of the pressed fluid filling media, and therefore, the pressed fluid filling media in the sixty-degree annular groove only pushes a movable plate to rotate at an accurate value angle below seconds, and the movable plate and the driving shaft synchronously rotate, and therefore, the driving shaft rotates at an accurate value angle below seconds;
3. according to the mass flowmeter and the measuring system thereof, the mass flowmeter device enters liquid through the entering pipeline, the liquid enters the annular notch from the position of the lower gap after defoaming at the eliminating plate, and the liquid entering the annular notch does not contain foam or has little foam content, so that the liquid passing through the annular notch eliminates the influence of the foam to reduce the flow metering accuracy of the liquid, namely, the liquid passing through the face area in the annular notch does not contain the foam and is compact, and the liquid inlet amount can be accurately controlled;
4. according to the mass flowmeter and the measuring system thereof, bubbles are filtered out from liquid through a plurality of groups of honeycomb holes, the bubbles are gathered above the eliminating plate, and the third control valve is opened periodically, so that the bubbles are released from the exhaust pipeline;
5. according to the mass flowmeter and the measuring system thereof, when the driving shaft is required to be reset, the corresponding piston head is moved to the upper part of the compression cavity, at the moment, the fluid filling medium in the sixty-degree annular groove is released, the reset spring can push the sliding block to move towards the direction of the guiding telescopic rod, so that the movable plate and the driving shaft are reset, and the reset spring is in a compression state when the sixty-degree annular groove is at a sixty-degree angle;
6. in order to increase the stability of the driving shaft during rotation, one end of the driving box is provided with the stabilizing cylinder, the side surface and the end surface of the driving shaft, which are positioned at the end part of the round hole, are always pressed by the balls, so that the stable rotation of the driving shaft is ensured, the eccentric phenomenon of the driving shaft is also limited, when the driving shaft or the balls are worn, the rotating tightening compression screw can push the pressing block to move towards the driving shaft, so that the driving shaft is maintained and stabilized again, the continuous maintenance and stabilization of the driving shaft are facilitated, the pressing block can adopt a magnetic block, the inner wall of the guide adjusting groove can adopt a stainless steel surface, and the pressing block is adsorbed and fixed in the guide adjusting groove, so that the fixing is facilitated;
7. according to the mass flowmeter and the measuring system thereof, the first rubber sealing ring is adsorbed and fixed on the inner wall of the driving box through the first magnetic suction plate, so that the driving box is conveniently sealed between the round hole and the inner wall of the driving box in real time, and the second magnetic suction plates in the two groups of rubber covered edges are mutually adsorbed and fixed, so that the position of the driving shaft penetrating out of the driving box is conveniently subjected to movable limiting and sealing;
8. according to the mass flowmeter and the measuring system thereof, the position of the driving shaft penetrating through the matching box is in sealing connection through the movable rubber ring, the driving shaft can rotate normally, the front side and the rear side of the movable plate and the fixed plate are fixedly connected through the rubber sealing gaskets, the communicating pipe is communicated with the inside of the front rubber sealing gasket and the rear rubber sealing gasket, and the front rubber sealing gasket and the rear rubber sealing gasket are blocked on the front side and the rear side of the fluid filling medium.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention.
Fig. 2 is a radial cross-sectional view of the drive housing of the present invention.
Fig. 3 is an axial cross-sectional view of the drive housing of the present invention.
Fig. 4 is an enlarged schematic view of the structure a in fig. 3 according to the present invention.
In the figure: the mass flowmeter device 1, the measurement adjusting device 2, the vertical intermediate partition 3, the eliminating plate 4, the lower gap 5, the exhaust pipe 6, the first control valve 7, the second control valve 8, the inlet pipe 9, the third control valve 10, the movable rubber ring 11, the fitting tank 12, the exhaust pipe 13, the annular notch 14, the drive tank 15, the drive shaft 16, the stabilizer tube 17, the communication pipe 18, the fluid filling medium 19, the concentration chamber 20, the compression chamber 21, the piston head 22, the pushing unit 23, the support plate 24, the first magnetic suction plate 25, the first rubber seal 26, the pressing screw 27, the guide adjusting groove 28, the pressing block 29, the round hole 30, the ball 31, the rubber seal gasket 32, the second rubber seal 33, the second magnetic suction plate 34, the rubber packing 35, the guide telescopic rod 36, the movable plate 37, the rubber seal 38, the magnetic suction plate 39, the fixed plate 40, the guide tube 41, the return spring 42, and the slider 43.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a mass flowmeter as shown in figures 1-4, which comprises a mass flowmeter device 1, wherein the mass flowmeter device 1 comprises a driving box 15 and a driving shaft 16, a stress mechanism is arranged in the driving box 15, the stress mechanism comprises a movable plate 37, the movable plate 37 is fixed on the outer ring of the driving shaft 16, one end of the movable plate 37, which is far away from the driving shaft 16, is fixedly provided with a rubber sealing gasket 38, the rubber sealing gasket 38 is in sealing fit with the inner wall of the driving box 15, the rubber sealing gasket 38 is fixedly provided with a magnetic suction sheet 39 which is adsorbed and fixed on the inner wall of the driving box 15, the inner wall of the driving box 15 is fixedly provided with a fixed plate 40, the end part of the fixed plate 40 keeps sealing with the driving shaft 16, the inside of the driving box 15 is partitioned into a sixty-degree annular groove and a three-hundred-degree annular groove by the movable plate 37, and the end part of a communicating pipe 18 is communicated into the sixty-degree annular groove;
the upper end of the drive box 15 is provided with a discharge pipe 13, a first control valve 7 is provided in the discharge pipe 13, and one side of the drive box 15 is provided with an output assembly.
The output assembly comprises a matching box 12 fixed on one side of a driving box 15, an inlet pipeline 9 is arranged at the end part of the matching box 12, a second control valve 8 is arranged in the inlet pipeline 9, an annular notch 14 is arranged on one side, close to the matching box 12, of the driving box 15, the annular notch 14 is distributed along the moving direction of a movable plate 37, and the annular notch 14 is communicated between a three hundred-degree annular groove and the inside of the matching box 12.
In order to solve the problem of small precision in flow adjustment of a mass flowmeter, a quantitative pressing-in box is arranged, the pipe diameter of a compression cavity 21 in the quantitative pressing-in box is smaller, the capacity of a sixty-degree annular groove is fifty to five hundred times larger than that in the compression cavity 21, when the rotation precision of a driving shaft below 16 seconds is required to be achieved, a group of piston heads 22 can be pressed into the bottom of the compression cavity 21 by using a pushing unit 23, so that a fluid filling medium 19 stored in the compression cavity 21 is pressed into the sixty-degree annular groove, the capacity in the sixty-degree annular groove is far larger than the volume of the pressed fluid filling medium 19, therefore, the pressed fluid filling medium 19 in the sixty-degree annular groove only pushes a movable plate 37 to rotate at an accurate value angle below seconds, and the movable plate 37 rotates synchronously with the driving shaft 16, the purpose of adjusting the opening size of an annular notch 14 with high precision is achieved, and accordingly the flow in the flowmeter is adjusted more accurately.
It should be noted that, in order to solve the problem of low rotation precision in the mechanical rotation process, a quantitative pressing-in box is provided, the diameter of the compression chamber 21 in the quantitative pressing-in box is smaller, the capacity of the sixty-degree ring groove is fifty times to five hundred times larger than the capacity in the compression chamber 21, when the rotation precision of the drive shaft below 16 seconds is required to be achieved, a group of piston heads 22 can be pressed into the bottom of the compression chamber 21 by using the pushing unit 23, so that the fluid filling medium 19 stored in the compression chamber 21 is pressed into the sixty-degree ring groove, and the capacity in the sixty-degree ring groove is far larger than the volume of the fluid filling medium 19 pressed into the sixty-degree ring groove, therefore, the part of the fluid filling medium 19 pressed into the sixty-degree ring groove only pushes the movable plate 37 to rotate at an accurate value angle below seconds, and the movable plate 37 rotates synchronously with the drive shaft 16, thus, the rotation of the drive shaft 16 at an accurate value angle below seconds is achieved.
The pushing unit 23 may use an electric push rod, an air cylinder, or the like.
The middle top surface of the matching box 12 is fixedly welded with a vertical middle partition plate 3, a lower gap 5 is arranged between the lower end of the vertical middle partition plate 3 and the bottom of the matching box 12, and an eliminating plate 4 is arranged between one side, far from 15, of the vertical middle partition plate 3 and the inner wall of the matching box 12.
Further, the mass flowmeter device 1 enters liquid through the entering pipeline 9, the liquid enters the annular notch 14 from the position of the lower gap 5 after defoaming at the eliminating plate 4, and the liquid entering the annular notch 14 does not contain foam or has little foam content, so that the liquid passing through the annular notch 14 eliminates the influence of the foam to reduce the flow metering accuracy, that is, the liquid passing through the face area of the annular notch 14 does not contain the foam and is compact, and the liquid inlet amount can be accurately controlled.
The eliminating plate 4 is provided with a plurality of groups of honeycomb-shaped through holes, the matching box 12 above the eliminating plate 4 is integrally provided with an exhaust pipeline 6, a third control valve 10 is arranged in the exhaust pipeline 6, and the exhaust pipeline 6 is communicated with the inside of the matching box 12 at one side of the vertical middle partition plate 3.
Specifically, the bubbles are filtered out from the liquid through a plurality of groups of honeycomb-shaped holes, the bubbles are accumulated above the eliminating plate 4, the third control valve 10 is opened periodically, so that the bubbles are released from the exhaust pipeline 6, and the third control valve 10, the second control valve 8 and the first control valve 7 can all use electromagnetic valves and other devices.
The invention also discloses a measuring system of the mass flowmeter, which is suitable for the mass flowmeter, the measuring system comprises a measuring and adjusting device 2, the measuring and adjusting device 2 comprises a quantitative pressing-in box, a centralized cavity 20 is arranged at the bottom of the quantitative pressing-in box, a fluid filling medium 19 which is pressed into the driving box 15 to push the driving shaft 16 to rotate relative to the axis of the driving shaft to be a shaft is stored in the centralized cavity 20, a compression cavity 21 penetrating through the upper surface of the driving shaft is also arranged in the quantitative pressing-in box, the bottom of the compression cavity 21 is communicated with the centralized cavity 20, a piston head 22 is movably arranged at the upper end of the compression cavity 21, an inverted L-shaped supporting plate 24 is fixedly welded at the top of the quantitative pressing-in box, a pushing unit 23 which pushes the piston head 22 to move downwards along the compression cavity 21 is welded at the top of the supporting plate 24, the end of the fluid filling medium 19 is communicated with the inside of the driving box 15 through a communicating pipe 18, and the fluid filling medium 19 is filled in sixty-degree ring grooves, the communicating pipe 18, the centralized cavity 20 and the compression cavity 21.
Specifically, the rubber gasket 38 at the end of the movable plate 37 is always bonded and sealed between the inner wall of the drive box 15 and the movable plate 37 by the magnetic attraction piece 39, so that the sealing performance is strong.
The compression chambers 21 are provided with a plurality of groups at equal distances in the constant pressure tank.
The compression chambers 21 are provided with a plurality of groups, so that when the driving shaft 16 needs to be rotated in a large range, fluid filling media 19 in the plurality of groups of compression chambers 21 are conveniently pressed into sixty-degree ring grooves at the same time, thereby realizing one-time large-range rotation of the driving shaft 16, and then, the fluid filling media 19 can be precisely regulated, and the media such as water can be used.
The piston head 22 has a circular plate-like structure.
The three hundred degree ring grooves are internally provided with reset mechanisms, each reset mechanism comprises a guide telescopic rod 36, a sliding block 43, a guide cylinder 41 and a reset spring 42, each guide telescopic rod 36 is of an arc-shaped rod-shaped structure, each guide cylinder 41 is of an arc-shaped tubular structure, each sliding block 43 is fixed at one end of each guide telescopic rod 36, the other end of each guide telescopic rod 36 is fixed on the inner wall of one side of the movable plate 37 far away from the corresponding fixed plate 40, each sliding block 43 movably stretches into each guide cylinder 41, one end of each guide cylinder 41 far away from each sliding block 43 is fixed on the inner wall of the corresponding fixed plate 40, each guide cylinder 41 is fixedly welded at the bottom end of the corresponding guide cylinder 41, each guide cylinder 41 pushes the corresponding sliding block 43 to rotate towards one side of the corresponding guide telescopic rod 36, and each guide telescopic rod 36 is coaxial with the driving shaft 16.
When it is desired to reset the drive shaft 16, the corresponding piston head 22 is moved above the compression chamber 21, at which time the fluid-filled medium 19 in the sixty-degree ring groove is released, and the return spring 42 may urge the slider 43 toward the guide extension rod 36, thereby resetting the movable plate 37 and the drive shaft 16, while the return spring 42 is in a compressed state when the sixty-degree ring groove is at the sixty-degree angle.
One side of the driving box 15 is provided with a maintenance mechanism, the maintenance mechanism comprises a stabilizing cylinder 17 integrally arranged on the side surface of the driving box 15, a round hole 30 which is communicated with the inside of the driving box 15 and is used for the end part of the driving shaft 16 to movably extend in is arranged in the stabilizing cylinder 17, guide adjusting grooves 28 are formed in the side surface and the bottom of the round hole 30, a pressing block 29 is movably arranged in the guide adjusting grooves 28 in a sliding manner, balls 31 which are movably attached to the periphery and the end surface of the driving shaft 16 are movably inlaid on the pressing block 29, a pressing screw 27 is further connected to the stabilizing cylinder 17 through threaded fit, one end of the pressing screw 27 is located outside the stabilizing cylinder 17, and the other end of the pressing screw is movably attached to one surface, far away from the balls 31, of the pressing block 29.
It should be noted that, in order to increase the stability of the rotation of the driving shaft 16, a stabilizing cylinder 17 is disposed at one end of the driving box 15, the side surface and the end surface of the end portion of the driving shaft 16 located in the round hole 30 are pressed by the balls 31 all the time, so that the stable rotation of the driving shaft 16 is ensured, the driving shaft 16 is limited not to generate eccentric phenomenon, when the driving shaft 16 or the balls 31 are worn, the rotating tightening compression screw 27 can push the pressing block 29 to move towards the driving shaft 16, so as to perform maintenance again, the driving shaft 16 is convenient to maintain and stabilize, the pressing block 29 can adopt a magnetic block, the inner wall of the guiding adjustment groove 28 can adopt a stainless steel surface, and the pressing block 29 is fixed in the guiding adjustment groove 28 in an adsorption manner, so that the fixing is convenient.
The driving box 15 is of a cylindrical shell structure, the driving shaft 16 is coaxial with the driving box 15, the driving shaft 16 is movably arranged at the axis position of the driving box 15, one end, far away from the round hole 30, of the driving shaft 16 movably extends out of the driving box 15, a sealing mechanism is arranged on the driving shaft 16 and comprises a first rubber sealing ring 26 and a second rubber sealing ring 33 which are fixed on the outer ring of the driving shaft 16, a first magnetic suction plate 25 which is adsorbed and fixed on the inner wall of the driving box 15 is arranged in the first rubber sealing ring 26, the first rubber sealing ring 26 is sealed at the position where the round hole 30 is communicated with the inside of the driving box 15, rubber binding 35 which is coated and attached to the inner surface and the outer surface of the driving box 15 are integrally arranged on two sides of the outer ring of the second rubber sealing ring 33 respectively, a second magnetic suction plate 34 is fixedly arranged in the rubber binding 35, and the second magnetic suction plates 34 in the two groups of the rubber binding 35 are adsorbed and fixed.
The first rubber sealing ring 26 is adsorbed and fixed on the inner wall of the driving box 15 through the first magnetic adsorption plate 25, so that the driving box is convenient to seal between the round hole 30 and the inner wall of the driving box 15 in real time, and the second magnetic adsorption plates 34 in the two groups of rubber covered edges 35 are adsorbed and fixed mutually, so that the position of the driving shaft 16 penetrating out of the driving box 15 is convenient to movably limit and seal;
in the device, the driving shaft 16 passes through the matching box 12 and is in sealing connection with the movable rubber ring 11, and the driving shaft 16 can rotate normally, the front side and the rear side between the movable plate 37 and the fixed plate 40 are fixedly connected through the rubber sealing gaskets 32, the communicating pipe 18 is communicated with the inside of the front and the rear sets of rubber sealing gaskets 32, and the front and the rear sets of rubber sealing gaskets 32 are blocked on the front side and the rear side of the fluid filling medium 19.
Working principle: in order to solve the problem of small precision in flow adjustment of a mass flowmeter, a quantitative pressing-in box is arranged, the pipe diameter of a compression cavity 21 in the quantitative pressing-in box is smaller, the capacity of a sixty-degree annular groove is fifty to five hundred times larger than that in the compression cavity 21, when the rotation precision of a driving shaft below 16 seconds is required to be achieved, a group of piston heads 22 can be pressed into the bottom of the compression cavity 21 by using a pushing unit 23, so that a fluid filling medium 19 stored in the compression cavity 21 is pressed into the sixty-degree annular groove, the capacity in the sixty-degree annular groove is far larger than the volume of the pressed fluid filling medium 19, therefore, the pressed fluid filling medium 19 in the sixty-degree annular groove only pushes a movable plate 37 to rotate at an accurate value angle below seconds, and the movable plate 37 rotates synchronously with the driving shaft 16, the purpose of adjusting the opening size of an annular notch 14 with high precision is achieved, and accordingly the flow in the flowmeter is adjusted more accurately.
It should be noted that, in order to solve the problem of low rotation precision in the mechanical rotation process, a quantitative pressing-in box is provided, the diameter of the compression chamber 21 in the quantitative pressing-in box is smaller, the capacity of the sixty-degree ring groove is fifty times to five hundred times larger than the capacity in the compression chamber 21, when the rotation precision of the drive shaft below 16 seconds is required to be achieved, a group of piston heads 22 can be pressed into the bottom of the compression chamber 21 by using the pushing unit 23, so that the fluid filling medium 19 stored in the compression chamber 21 is pressed into the sixty-degree ring groove, and the capacity in the sixty-degree ring groove is far larger than the volume of the fluid filling medium 19 pressed into the sixty-degree ring groove, therefore, the part of the fluid filling medium 19 pressed into the sixty-degree ring groove only pushes the movable plate 37 to rotate at an accurate value angle below seconds, and the movable plate 37 rotates synchronously with the drive shaft 16, thus, the rotation of the drive shaft 16 at an accurate value angle below seconds is achieved.
The pushing unit 23 may use an electric push rod, an air cylinder, or the like.
The mass flowmeter device 1 enters liquid through the entering pipeline 9, the liquid enters the annular notch 14 from the position of the lower gap 5 after defoaming at the eliminating plate 4, and the liquid entering the annular notch 14 does not contain foam or has little foam content, so that the liquid passing through the annular notch 14 eliminates the influence of the foam to reduce the flow metering accuracy, that is, the liquid passing through the face area in the annular notch 14 does not contain the foam and is compact, and the inlet amount of the liquid can be accurately controlled.
The liquid is filtered to remove bubbles through a plurality of groups of honeycomb-shaped holes, the bubbles are accumulated above the eliminating plate 4, the third control valve 10 is opened periodically, so that the bubbles are released from the exhaust pipeline 6, and the third control valve 10, the second control valve 8 and the first control valve 7 can all use electromagnetic valves and other devices.
The rubber gasket 38 at the end of the movable plate 37 is always attached and sealed between the inner wall of the driving box 15 and the movable plate 37 through the magnetic attraction piece 39, so that the tightness is strong.
The compression chambers 21 are provided with a plurality of groups, so that when the driving shaft 16 needs to be rotated in a large range, fluid filling media 19 in the plurality of groups of compression chambers 21 are conveniently pressed into sixty-degree ring grooves at the same time, thereby realizing one-time large-range rotation of the driving shaft 16, and then, the fluid filling media 19 can be precisely regulated, and the media such as water can be used.
When it is desired to reset the drive shaft 16, the corresponding piston head 22 is moved above the compression chamber 21, at which time the fluid-filled medium 19 in the sixty-degree ring groove is released, and the return spring 42 may urge the slider 43 toward the guide extension rod 36, thereby resetting the movable plate 37 and the drive shaft 16, while the return spring 42 is in a compressed state when the sixty-degree ring groove is at the sixty-degree angle.
In order to increase the stability of the driving shaft 16 during rotation, a stabilizing cylinder 17 is arranged at one end of the driving box 15, the side surface and the end surface of the driving shaft 16, which are positioned at the end part of the round hole 30, are always pressed by the balls 31, so that the stable rotation of the driving shaft 16 is ensured, the driving shaft 16 is limited not to generate eccentric phenomenon, when the driving shaft 16 or the balls 31 are worn, the rotating tightening compression screw 27 can push the pressing block 29 to move towards the driving shaft 16, so that the driving shaft 16 is stabilized again, the continuous maintenance of the driving shaft 16 is facilitated, the pressing block 29 can adopt a magnetic block, the inner wall of the guide adjusting groove 28 can adopt a stainless steel surface, and the pressing block 29 is adsorbed and fixed in the guide adjusting groove 28, so that the fixing is facilitated.
The first rubber sealing ring 26 is adsorbed and fixed on the inner wall of the driving box 15 through the first magnetic adsorption plate 25, so that the driving box is convenient to seal between the round hole 30 and the inner wall of the driving box 15 in real time, and the second magnetic adsorption plates 34 in the two groups of rubber covered edges 35 are adsorbed and fixed mutually, so that the position of the driving shaft 16 penetrating out of the driving box 15 is convenient to movably limit and seal;
in the device, the driving shaft 16 passes through the matching box 12 and is in sealing connection with the movable rubber ring 11, and the driving shaft 16 can rotate normally, the front side and the rear side between the movable plate 37 and the fixed plate 40 are fixedly connected through the rubber sealing gaskets 32, the communicating pipe 18 is communicated with the inside of the front and the rear sets of rubber sealing gaskets 32, and the front and the rear sets of rubber sealing gaskets 32 are blocked on the front side and the rear side of the fluid filling medium 19.
Claims (10)
1. A mass flowmeter comprising a mass flowmeter device (1), characterized in that: the mass flowmeter device (1) comprises a driving box (15) and a driving shaft (16), wherein a stress mechanism is arranged in the driving box (15), the stress mechanism comprises a movable plate (37), the movable plate (37) is fixed on the outer ring of the driving shaft (16), a rubber sealing gasket (38) is fixedly arranged at one end, far away from the driving shaft (16), of the movable plate (37), the rubber sealing gasket (38) is tightly attached to the inner wall of the driving box (15), a magnetic attraction sheet (39) which is fixedly adsorbed and fixed on the inner wall of the driving box (15) is fixedly arranged in the rubber sealing gasket (38), a fixing plate (40) is fixedly arranged on the inner wall of the driving box (15), sealing is kept between the end part of the fixing plate (40) and the driving shaft (16), the inside of the driving box (15) is separated into a sixty-degree annular groove and a three-hundred-degree annular groove, and the end part of a communicating pipe (18) is led into the sixty-degree annular groove;
the upper end of the driving box (15) is provided with a discharge pipeline (13), a first control valve (7) is arranged in the discharge pipeline (13), and one side of the driving box (15) is provided with an output assembly.
2. A mass flow meter as claimed in claim 1, wherein: the output assembly comprises a matching box (12) fixed on one side of a driving box (15), an inlet pipeline (9) is arranged at the end part of the matching box (12), a second control valve (8) is arranged in the inlet pipeline (9), an annular notch (14) is arranged on one side, close to the matching box (12), of the driving box (15), the annular notch (14) is distributed along the moving direction of a movable plate (37), and the annular notch (14) is communicated between a three-hundred-degree annular groove and the inside of the matching box (12).
3. A mass flow meter as claimed in claim 2, wherein: the middle top surface of the matching box (12) is fixedly welded with a vertical middle partition plate (3), a lower gap (5) is arranged between the lower end of the vertical middle partition plate (3) and the bottom of the matching box (12), and an eliminating plate (4) is arranged between one side, far away from (15), of the vertical middle partition plate (3) and the inner wall of the matching box (12).
4. A mass flow meter as claimed in claim 3, wherein: the utility model discloses a vertical middle baffle plate, including baffle plate (3), baffle plate (4), cooperation case (12) of baffle plate (4) top is provided with the through-hole of multiunit cellular, be provided with exhaust duct (6) on the cooperation case (12) of baffle plate (4) top an organic whole, be provided with third control valve (10) in exhaust duct (6), inside cooperation case (12) of vertical middle baffle plate (3) one side is linked together to exhaust duct (6).
5. A measurement system for a mass flow meter, characterized by: a mass flowmeter suitable for claim 4, the measurement system includes measurement adjusting device (2), measurement adjusting device (2) is including quantitative pressing in the case, quantitative pressing in case bottom is provided with centralization chamber (20), centralization chamber (20) are stored in and are pushed into drive case (15) and drive shaft (16) are fluid filling medium (19) of rotation for the axle with self axis, still be provided with compression chamber (21) that runs through its upper surface in the ration pressing in case, compression chamber (21) bottom and centralization chamber (20) intercommunication, compression chamber (21) upper end activity is provided with piston head (22), quantitative pressing in case top fixed welding has backup pad (24) of inverted L font, the top welding of backup pad (24) has promotion piston head (22) along compression chamber (21) pushing unit (23) that moves down, fluid filling medium (19)'s tip is through communicating pipe (18) and the inside intercommunication of drive case (15), and sixty degrees annular groove, communicating pipe (18), centralization chamber (20), compression chamber (21) are filled fluid filling medium (19) fully.
6. A mass flowmeter measurement system as set forth in claim 5 wherein: the compression chambers (21) are provided with a plurality of groups at equal distances in the quantitative pressing-in box.
7. A mass flowmeter measurement system as set forth in claim 6 wherein: the piston head (22) has a circular plate-like structure.
8. A mass flowmeter measurement system as set forth in claim 7 wherein: the three hundred degree ring grooves are internally provided with reset mechanisms, each reset mechanism comprises a guide telescopic rod (36), a sliding block (43), a guide cylinder (41) and a reset spring (42), each guide telescopic rod (36) is of an arc-shaped rod-shaped structure, each guide cylinder (41) is of an arc-shaped tubular structure, each sliding block (43) is fixed at one end of each guide telescopic rod (36), the other end of each guide telescopic rod (36) is fixed on one side inner wall of a movable plate (37) away from a fixed plate (40), each sliding block (43) movably stretches into each guide cylinder (41), one end of each guide cylinder (41) away from each sliding block (43) is fixed on the inner wall of the corresponding fixed plate (40), each guide cylinder (41) is fixedly welded with a sliding block (43) which pushes the corresponding sliding block (43) to one side of each guide telescopic rod (36), and each guide cylinder (41) and each guide telescopic rod (36) are coaxial with a driving shaft (16).
9. A mass flowmeter measurement system as set forth in claim 8 wherein: one side of driving case (15) is provided with dimension steady mechanism, dimension steady mechanism including an organic whole set up in the stable section of thick bamboo (17) of driving case (15) side, be provided with in the stable section of thick bamboo (17) with driving case (15) inside intercommunication and supply tip activity of driving shaft (16) to stretch into round hole (30), the side and the bottom of round hole (30) all are provided with direction adjustment groove (28), the activity slides in direction adjustment groove (28) and is provided with briquetting (29), and the activity is inlayed on briquetting (29) has ball (31) of activity laminating in driving shaft (16) periphery and terminal surface, still be connected with compression screw (27) through screw-thread fit on stable section of thick bamboo (17), the one end of compression screw (27) is located the outside of stable section of thick bamboo (17), and the other end activity laminating is kept away from the one side of ball (31) at briquetting (29).
10. A mass flowmeter measurement system as claimed in claim 9, wherein: the driving box (15) is of a cylindrical shell structure, the driving shaft (16) is coaxial with the driving box (15), the driving shaft (16) is movably arranged at the axis position of the driving box (15), one end of the driving shaft (16) away from the round hole (30) is movably extended out of the driving box (15), a sealing mechanism is arranged on the driving shaft (16), the sealing mechanism comprises a first rubber sealing ring (26) and a second rubber sealing ring (33) which are fixed on the outer ring of the driving shaft (16), a first magnetic suction plate (25) which is fixed on the inner wall of the driving box (15) in an adsorption mode is arranged in the first rubber sealing ring (26), the first rubber sealing ring (26) is sealed at the position inside the driving box (15) through the round hole (30), rubber wrapping edges (35) which are wrapped and attached to the inner surface and the outer ring of the driving box (15) are integrally arranged on two sides of the outer ring of the second rubber sealing ring (33), the second magnetic suction plate (34) are fixed in the rubber wrapping edges (35), and the second magnetic suction plate (34) in the two groups of the rubber wrapping edges are fixed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210422846.9A CN116772953A (en) | 2022-04-21 | 2022-04-21 | Mass flowmeter and measuring system thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210422846.9A CN116772953A (en) | 2022-04-21 | 2022-04-21 | Mass flowmeter and measuring system thereof |
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| CN202210422846.9A Pending CN116772953A (en) | 2022-04-21 | 2022-04-21 | Mass flowmeter and measuring system thereof |
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