CN219975518U - Gas pressure stabilizing device and gas mass flow regulating device - Google Patents
Gas pressure stabilizing device and gas mass flow regulating device Download PDFInfo
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- CN219975518U CN219975518U CN202321294385.8U CN202321294385U CN219975518U CN 219975518 U CN219975518 U CN 219975518U CN 202321294385 U CN202321294385 U CN 202321294385U CN 219975518 U CN219975518 U CN 219975518U
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- 230000000087 stabilizing effect Effects 0.000 title claims abstract description 160
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 121
- 230000006641 stabilisation Effects 0.000 claims abstract description 5
- 238000011105 stabilization Methods 0.000 claims abstract description 5
- 239000012528 membrane Substances 0.000 claims description 10
- 238000005259 measurement Methods 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 6
- 238000012546 transfer Methods 0.000 claims description 4
- 238000007707 calorimetry Methods 0.000 claims description 3
- 230000002596 correlated effect Effects 0.000 claims description 3
- 230000033228 biological regulation Effects 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 164
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 24
- 239000001301 oxygen Substances 0.000 description 24
- 229910052760 oxygen Inorganic materials 0.000 description 24
- 238000006213 oxygenation reaction Methods 0.000 description 18
- 238000000034 method Methods 0.000 description 12
- 230000000875 corresponding effect Effects 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000003993 interaction Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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Abstract
The utility model provides a gas pressure stabilizing device and a gas mass flow regulating device, and relates to the technical field of gas mass flow regulation. The gas pressure stabilizing device comprises a valve body, a valve core and a pressure stabilizing coil, wherein the valve body is provided with a valve cavity, a pressure stabilizing air inlet flow channel and a pressure stabilizing air outlet flow channel; the valve core comprises a pressure stabilizing diaphragm, the pressure stabilizing diaphragm divides the valve cavity into a first cavity and a second cavity which are mutually independent, and the first cavity can be communicated with an air inlet channel of a part needing pressure stabilization; the pressure-stabilizing air inlet flow passage, the second chamber and the pressure-stabilizing air outlet flow passage are sequentially communicated, and the pressure-stabilizing air inlet flow passage can be communicated with the air outlet flow passage of the part needing pressure stabilization; the valve core also comprises a movable magnet and a valve needle, wherein the movable magnet and the valve needle are fixedly connected and are respectively arranged in the first cavity and the second cavity, and the voltage stabilizing coil is wound around the movable magnet. The gas pressure stabilizing device has the advantages of wide pressure stabilizing range, multiple application occasions, capability of ensuring pressure stabilizing precision and automatic adjustment.
Description
Technical Field
The utility model relates to the technical field of gas mass flow regulation, in particular to a gas pressure stabilizing device and a gas mass flow regulating device.
Background
The boiler feed water oxygenation treatment is the optimal feed water treatment working condition of the supercritical unit, and can solve the problems of flow acceleration corrosion and the problems brought by the flow acceleration corrosion of a feed water system and a condensate system. However, in the process, the unit has higher requirements on the oxygen content in the water vapor system, and not only is the oxygen content required to be low, but also the accuracy requirement is higher, so that the control is difficult.
The oxygen regulation mode in the prior art is as follows: according to the working pressure or the design pressure of the boiler pipeline, the oxygen pressure is regulated to a corresponding range through the pressure reducing valve, and a back pressure valve is arranged between the pressure reducing valve and the oxygen adding point, so that the pressure difference value of the gas at the inlet and the outlet of the pressure reducing valve is kept stable, the output precision of the pressure reducing valve is improved, and the oxygen adding precision is further improved.
However, the back pressure valve carries out differential pressure adjustment by means of the elastic force of the spiral spring, the adjustment range depends on the physical property of the spiral spring, the application range is limited, moreover, the elastic force of the spiral spring is difficult to control, the pressure stabilizing precision is low, the compression degree of the spiral spring is adjusted by screwing the valve rod which is abutted to the spiral spring, so that the size of the elastic force is controlled, and automatic pressure stabilizing adjustment cannot be realized.
Disclosure of Invention
The first object of the present utility model is to provide a gas pressure stabilizing device, which solves the technical problems of the prior art that the application range of the back pressure valve is small, the pressure stabilizing precision is low, and the oxygenation precision is low.
The utility model provides a gas pressure stabilizing device which comprises a valve body, a valve core and a pressure stabilizing coil, wherein the valve body is provided with a valve cavity, a pressure stabilizing air inlet flow channel and a pressure stabilizing air outlet flow channel; the valve core comprises a pressure stabilizing diaphragm, the pressure stabilizing diaphragm divides the valve cavity into a first cavity and a second cavity which are mutually independent, and the first cavity can be communicated with an air inlet channel of a part needing pressure stabilizing; the pressure-stabilizing air inlet flow passage, the second chamber and the pressure-stabilizing air outlet flow passage are sequentially communicated, and the pressure-stabilizing air inlet flow passage can be communicated with the air outlet flow passage of the pressure-stabilizing part; the valve core further comprises a movable magnet and a valve needle, the movable magnet is fixedly connected with the valve needle and is arranged in the first cavity and the second cavity respectively, and the valve needle can seal the stable-pressure air outlet flow channel; the voltage stabilizing coil is wound around the movable magnet and used for driving the movable magnet to move.
Further, the gas pressure stabilizing device further comprises a data processor, and a gas source pressure sensor and a pressure stabilizing pressure sensor which are connected with the data processor, wherein the gas source pressure sensor is used for detecting the gas pressure in the gas inlet flow channel of the part needing pressure stabilizing, and the pressure stabilizing pressure sensor is used for detecting the gas pressure in the gas outlet flow channel of the part needing pressure stabilizing; the data processor can compare the difference value of the gas pressure measured by the gas source pressure sensor and the pressure stabilizing pressure sensor with a preset pressure difference, and adjust the energizing current of the pressure stabilizing coil according to the comparison result.
Further, the preset pressure difference is in the range of 0.2-0.6 Mpa, and the preset pressure difference is positively correlated with the calibrated flow of the gas.
The gas pressure stabilizing device provided by the utility model has the following beneficial effects:
the gas pressure stabilizing device provided by the utility model can stabilize the gas pressure difference of the inlet and outlet of the part to be stabilized at a preset pressure difference, when the gas pressure stabilizing device is used, the first chamber is communicated with the air inlet flow channel of the part to be stabilized, the second chamber is communicated with the air outlet flow channel of the part to be stabilized, the electromagnetic force acting on the moving magnet can be regulated by regulating the power-on current of the pressure stabilizing coil of the pressure stabilizing device, so that the valve needle opens the pressure stabilizing air outlet flow channel to give out air, and the pressure of the gas in the first chamber is equal to the sum of the acting forces of the valve core and the gas in the second chamber, which are applied to the pressure stabilizing membrane, so that the gas pressure difference in the first chamber and the second chamber is the preset pressure difference, and the pressure stabilizing membrane is in a balanced state, namely the effect of stabilizing the inlet and outlet gas pressure difference of the part to be stabilized at the preset pressure difference is achieved.
Compared with the traditional back pressure valve, the adjusting range of the electromagnetic force of the gas pressure stabilizing device is wider than the adjusting range of the elastic force of the spiral spring in the back pressure valve, the electromagnetic force can be accurately adjusted by adjusting the energizing current of the pressure stabilizing coil, namely, the adjusting precision of the electromagnetic force is higher, so that the adjusting precision of the gas pressure difference of an inlet and an outlet of a part to be stabilized is also higher, namely, the pressure stabilizing precision is also higher. Namely, the gas pressure stabilizing device provided by the utility model has wide pressure stabilizing range, so that the device is applicable to a plurality of occasions; the pressure stabilizing precision can be ensured no matter the pressure and the flow of the gas, so that the output precision of the part to be stabilized can be ensured, and the oxygen adding precision can be improved when the device is applied to an oxygen adding occasion; moreover, can realize automatically regulated, labour saving and time saving.
The second object of the present utility model is to provide a gas mass flow rate adjusting device, so as to solve the technical problems of small application range, low pressure stabilizing precision and low oxygenation precision of the back pressure valve in the prior art.
The utility model provides a gas mass flow regulating device, which comprises an electronic regulating valve, the gas pressure stabilizing device and a controller, wherein the electronic regulating valve and the gas pressure stabilizing device are sequentially communicated with a gas flow passage, the electronic regulating valve and the gas pressure stabilizing device are both connected with the controller, and the controller can control the electronic regulating valve to act according to set mass flow and control the gas pressure stabilizing device to act according to preset pressure difference.
Further, the electronic regulating valve comprises a needle type electric regulating valve or an electromagnetic regulating valve.
Further, a mass flow sensor is arranged between the electronic regulating valve and the gas pressure stabilizing device, an air inlet runner of the mass flow sensor is communicated with an air outlet runner of the electronic regulating valve, and an air outlet runner of the mass flow sensor is communicated with a pressure stabilizing air inlet runner of the gas pressure stabilizing device and is used for measuring the mass flow of gas output by the electronic regulating valve; the mass flow sensor is also connected with the controller, and the controller can correct the action of the electronic regulating valve according to the measurement result of the mass flow sensor so as to ensure that the mass flow of the gas output by the electronic regulating valve is within a preset error range.
Further, the mass flow sensor measures the mass flow of the gas by adopting a capillary heat transfer temperature difference calorimeter principle or by adopting a coriolis force principle.
Further, the gas mass flow rate regulating device further comprises a valve seat and a shell covered on the valve seat, the electronic regulating valve, the mass flow sensor and the gas pressure stabilizing device are all located in the shell, and the valve seat is provided with a gas flow passage required by the three components, and the valve seat is shared by the three components.
Further, the shell is provided with a data connector, and the controller is also arranged in the shell and performs data interaction with the outside through the data connector.
The gas mass flow regulating device provided by the utility model has the following beneficial effects:
according to the gas mass flow regulating device provided by the utility model, through the arrangement of the gas pressure stabilizing device, the gas pressure difference of the inlet and the outlet of the electronic regulating valve can be stabilized at the preset pressure difference, so that the output precision of the electronic regulating valve is improved. When the valve is used, the first cavity is communicated with the air inlet flow passage of the electronic regulating valve, the second cavity is communicated with the air outlet flow passage of the electronic regulating valve, the electromagnetic force acting on the movable magnet can be regulated by regulating the energizing current of the pressure stabilizing coil of the pressure stabilizing device, so that the valve needle opens the pressure stabilizing air outlet flow passage to give vent to anger, the pressure of the air in the first cavity applied to the pressure stabilizing diaphragm is equal to the sum of the acting forces of the valve core and the air in the second cavity applied to the pressure stabilizing diaphragm, the air pressure difference in the first cavity and the air pressure difference in the second cavity are preset pressure differences, and the pressure stabilizing diaphragm is in a balanced state, namely the effect of stabilizing the air pressure difference of the inlet and the outlet of the electronic regulating valve at the preset pressure difference is achieved.
Compared with the traditional back pressure valve, the gas mass flow regulating device provided by the utility model uses the gas pressure stabilizing device, the regulating range of electromagnetic force of the gas pressure stabilizing device is wider than the regulating range of elastic force of the spiral spring in the back pressure valve, and the electromagnetic force can be accurately regulated by regulating the energizing current of the pressure stabilizing coil, namely, the regulating precision of the electromagnetic force is higher, so that the regulating precision of the gas pressure difference at the inlet and outlet of the electronic regulating valve is higher, namely, the pressure stabilizing precision is higher, and the output precision of the electronic regulating valve can be improved; in addition, according to the gas mass flow regulating device provided by the utility model, the gas pressure stabilizing device can automatically regulate the electrified current according to the preset pressure difference, so that the electronic regulating valve can automatically and accurately regulate, and time and labor are saved. Namely, the gas mass flow regulating device provided by the utility model has a wide pressure stabilizing range, so that the regulating range of the electronic regulating valve is also enlarged; the gas pressure stabilizing device has high pressure stabilizing precision, can ensure the output precision of the electronic regulating valve, and can improve the oxygenation precision when being applied to oxygenation occasions; the gas pressure stabilizing device can realize automatic adjustment according to preset pressure difference corresponding to the set mass flow, so that the device can automatically and accurately output gas, and time and labor are saved.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic cross-sectional view of a gas pressure stabilizer according to an embodiment of the present utility model;
fig. 2 is a schematic cross-sectional view of a gas mass flow rate adjusting device according to an embodiment of the present utility model.
Reference numerals illustrate:
100-a gas pressure stabilizing device; 110-valve body; 111-a pressure stabilizing air inlet channel; 112-pressure stabilizing air outlet flow passage; 113-a first chamber; 114-a second chamber; 120-valve core; 121-a pressure stabilizing membrane; 122-moving magnet; 123-valve needle; 130-a voltage stabilizing coil; 140-a data processor; 150-an air source pressure sensor; 160-a pressure stabilizing sensor; 170-a flow guide pipe; 181-a first sealing ring; 182-a second seal ring; 183-seal;
200-an electronic regulating valve;
300-mass flow sensor; 310-throttling the flow passage; 320-measuring the flow channel;
400-a controller;
500-valve seat; 510-air inlet; 520-outlet; 530-long bolts; 600-shell; 700-data connector; 810-a third sealing ring; 820-fourth seal ring.
Detailed Description
In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
The embodiment provides a gas pressure stabilizing device 100, fig. 1 shows a schematic cross-sectional structure of the gas pressure stabilizing device 100, as shown in fig. 1, the gas pressure stabilizing device 100 includes a valve body 110, a valve core 120 and a pressure stabilizing coil 130, the valve body 110 is provided with a valve cavity, a pressure stabilizing air inlet channel 111 and a pressure stabilizing air outlet channel 112; the valve core 120 comprises a pressure stabilizing membrane 121, the pressure stabilizing membrane 121 divides the valve cavity into a first chamber 113 and a second chamber 114 which are mutually independent, and the first chamber 113 can be communicated with an air inlet channel of a part needing pressure stabilization; the pressure-stabilizing air inlet flow passage 111, the second chamber 114 and the pressure-stabilizing air outlet flow passage 112 are sequentially communicated, and the pressure-stabilizing air inlet flow passage 111 can be communicated with an air outlet flow passage of a part needing pressure stabilization; the valve core 120 further comprises a moving magnet 122 and a valve needle 123, the moving magnet 122 and the valve needle 123 are fixedly connected and are respectively arranged in the first chamber 113 and the second chamber 114, and the valve needle 123 can seal the steady-pressure air outlet flow passage 112; the voltage stabilizing coil 130 is wound around the moving magnet 122 and is used for driving the moving magnet 122 to move.
The gas pressure stabilizing device 100 provided in this embodiment can stabilize the gas pressure difference at the inlet and outlet of the part to be stabilized at a preset pressure difference, when in use, the first chamber 113 is communicated with the gas inlet channel of the part to be stabilized, the second chamber 114 is communicated with the gas outlet channel of the part to be stabilized, the electromagnetic force acting on the moving magnet 122 can be regulated by regulating the energizing current of the pressure stabilizing coil 130 of the pressure stabilizing device, so that the valve needle 123 opens the pressure stabilizing gas outlet channel 112 to discharge gas, and the pressure of the gas in the first chamber 113 applied to the pressure stabilizing membrane 121 is equal to the sum of the acting forces of the valve core 120 and the gas in the second chamber 114 applied to the Yu Wenya membrane 121, so that the gas pressure difference in the first chamber 113 and the second chamber 114 is at a preset pressure difference, and the pressure stabilizing membrane 121 is in a balanced state, i.e. the effect of stabilizing the gas pressure difference at the inlet and outlet of the part to be stabilized at the preset pressure difference is achieved.
Compared with the traditional back pressure valve, the adjusting range of the electromagnetic force of the gas pressure stabilizing device 100 provided by the embodiment is wider than the adjusting range of the elastic force of the spiral spring in the back pressure valve, and the electromagnetic force can be accurately adjusted by adjusting the energizing current of the pressure stabilizing coil 130, namely, the adjusting precision of the electromagnetic force is higher, so that the adjusting precision of the gas pressure difference of the inlet and outlet of the part to be stabilized is also higher, namely, the pressure stabilizing precision is also higher, and moreover, the gas pressure stabilizing device 100 provided by the embodiment can automatically adjust the energizing current according to the preset pressure difference, so that time and labor are saved. That is, the gas pressure stabilizing device 100 provided in this embodiment has a wide pressure stabilizing range, so that the device is suitable for many occasions; the pressure stabilizing precision can be ensured no matter the pressure and the flow of the gas, so that the output precision of the part to be stabilized can be ensured, and the oxygen adding precision can be improved when the device is applied to an oxygen adding occasion; moreover, can realize automatically regulated, labour saving and time saving.
Specifically, in this embodiment, as further shown in fig. 1, the gas pressure stabilizing device 100 further includes a data processor 140, and a gas source pressure sensor 150 and a pressure stabilizing pressure sensor 160 both connected to the data processor 140, where the gas source pressure sensor 150 is used to detect the gas pressure in the gas inlet channel of the component to be stabilized, and the pressure stabilizing pressure sensor 160 is used to detect the gas pressure in the gas outlet channel of the component to be stabilized; the voltage stabilizing coil 130 is also connected to the data processor 140, and the data processor 140 can compare the difference between the gas pressures measured by the gas source pressure sensor 150 and the voltage stabilizing pressure sensor 160 with a preset pressure difference, and adjust the energizing current of the voltage stabilizing coil 130 according to the comparison result. The actual pressure difference of the inlet and outlet gases of the part to be stabilized can be obtained through the measurement results of the gas source pressure sensor 150 and the stabilized pressure sensor 160, so that the magnitude of the electromagnetic force can be corrected to make the actual pressure difference consistent with the preset pressure difference or within the allowable error range.
Specifically, in this embodiment, the preset pressure difference ranges from 0.2 Mpa to 0.6Mpa, and the preset pressure difference is positively correlated with the calibrated flow of the gas. That is, the greater the nominal flow of gas, the greater the preset pressure differential.
Specifically, in this embodiment, as shown in fig. 1, the first chamber 113 is connected to a flow guiding pipe 170, and the other end of the flow guiding pipe 170 is used to communicate with an air inlet channel of a component to be stabilized.
Specifically, in the present embodiment, continuing to fig. 1, the valve body 110 includes a lower valve body and an upper valve body, the upper valve body being mounted to the lower valve body while pressing the pressure stabilizing diaphragm 121 to the lower valve body; a first sealing ring 181 is arranged between the side of the pressure stabilizing diaphragm 121 facing the second chamber 114 and the lower valve body so as to ensure the tightness of the second chamber 114; a second sealing ring 182 is provided between the upper side of the pressure stabilizing diaphragm 121 and the component parts of the upper valve body, for ensuring the tightness of the first chamber 113.
Further, as further shown in fig. 1, the end of the needle 123 remote from the moving magnet 122 is provided with a seal 183, and the needle 123 is in contact with the air inlet of the regulated outlet flow path 112 via the seal 183 to close the regulated outlet flow path 112.
The embodiment further provides a gas mass flow rate adjusting device, as shown in fig. 2, where the gas mass flow rate adjusting device includes an electronic adjusting valve 200 and the gas pressure stabilizing device 100 that are sequentially communicated with each other through a gas flow channel, and further includes a controller 400, where the electronic adjusting valve 200 and the gas pressure stabilizing device 100 are both connected to the controller 400, and the controller 400 can control the electronic adjusting valve 200 to act according to a set mass flow rate, and control the gas pressure stabilizing device 100 to act according to a preset pressure difference.
According to the gas mass flow regulating device provided by the embodiment, by arranging the gas pressure stabilizing device 100, the gas pressure difference of the inlet and the outlet of the electronic regulating valve 200 can be stabilized at the preset pressure difference, so that the output precision of the electronic regulating valve 200 is improved. When the valve is used, the first chamber 113 is communicated with the air inlet flow channel of the electronic regulating valve 200, the second chamber 114 is communicated with the air outlet flow channel of the electronic regulating valve 200, the electromagnetic force acting on the moving magnet 122 can be regulated by regulating the energizing current of the pressure stabilizing coil 130 of the pressure stabilizing device, so that the valve needle 123 opens the pressure stabilizing air outlet flow channel 112 to give air, the pressure of the air in the first chamber 113 applied to the pressure stabilizing diaphragm 121 is equal to the sum of the acting forces of the valve core 120 and the air in the second chamber 114 applied to the Yu Wenya diaphragm 121, so that the air pressure difference in the first chamber 113 and the second chamber 114 is a preset pressure difference, and the pressure stabilizing diaphragm 121 is in a balanced state, namely the effect of stabilizing the air pressure difference at the inlet and the outlet of the electronic regulating valve 200 to the preset pressure difference is achieved.
Compared with the use of the conventional back pressure valve, the gas mass flow regulating device provided by the embodiment uses the gas pressure regulating device 100, and the regulating range of the electromagnetic force of the gas pressure regulating device 100 is wider than the regulating range of the elastic force of the spiral spring in the back pressure valve, and the electromagnetic force can be accurately regulated by regulating the energizing current of the pressure regulating coil 130, namely, the regulating precision of the electromagnetic force is higher, so that the regulating precision of the gas pressure difference at the inlet and outlet of the electronic regulating valve 200 is also higher, namely, the regulating precision of the pressure regulating precision is also higher, and the output precision of the electronic regulating valve 200 can be improved; moreover, in the gas mass flow rate adjusting device provided in this embodiment, since the gas pressure stabilizing device 100 can automatically adjust the current according to the preset pressure difference, the electronic adjusting valve 200 can also automatically and accurately adjust, so that time and labor are saved. That is, in the gas mass flow rate adjusting device provided in the present embodiment, the pressure stabilizing range of the gas pressure stabilizing device 100 is wide, so that the adjusting range of the electronic adjusting valve 200 is also increased; the gas pressure stabilizing device 100 has high pressure stabilizing precision, can ensure the output precision of the electronic regulating valve 200, and can improve the oxygenation precision when being applied to oxygenation occasions; the gas pressure stabilizing device 100 can automatically adjust according to a preset pressure difference corresponding to the set mass flow, so that the device can automatically and accurately output gas, and time and labor are saved.
Specifically, in the present embodiment, the controller 400 integrates the functions of the data processor 140 of the gas pressure stabilizing device 100.
Specifically, in the present embodiment, the electronic control valve 200 is a needle-type electric control valve. Of course, in other embodiments of the present utility model, the electronic control valve 200 may also be a solenoid control valve, so long as the controller 400 can control the electronic control valve 200 according to the set mass flow rate to achieve automatic adjustment of the gas mass flow rate.
Specifically, in this embodiment, as shown in fig. 2, a mass flow sensor 300 is further disposed between the electronic regulator 200 and the gas pressure-stabilizing device 100, an air inlet channel of the mass flow sensor 300 is communicated with an air outlet channel of the electronic regulator 200, and the air outlet channel of the mass flow sensor 300 is communicated with a pressure-stabilizing air inlet channel 111 of the gas pressure-stabilizing device 100 for measuring the mass flow of the gas output by the electronic regulator 200; the mass flow sensor 300 is also connected to the controller 400, and the controller 400 can correct the action of the electronic regulator 200 according to the measurement result of the mass flow sensor 300, so that the mass flow of the gas output by the electronic regulator is within a preset error range. The mass flow sensor 300 can timely measure the mass flow of the actual output gas of the electronic regulating valve 200, so that the mass of the actual output gas can be further obtained, and the electronic regulating valve 200 can be timely adjusted after the actual oxygen is dissolved in a boiler pipeline by the dissolved oxygen analyzer when the electronic regulating valve 200 is applied to an oxygen adding occasion, so that the regulation lag of the electronic regulating valve 200 can be effectively avoided, and the oxygen adding precision can be ensured. Typically, the actual oxygenation can be measured in the boiler tubes after at least 20 minutes of oxygenation.
Specifically, in this embodiment, continuing to refer to FIG. 2, the mass flow sensor 300 measures the mass flow of gas using capillary heat transfer, temperature differential calorimetry principles. Capillary heat transfer differential calorimetry principle: two groups of thermistor wires are wound on the capillary tube, the two groups of thermistor wires and the two precision resistors form a measuring bridge, and the thermistor wires are electrified and heated during operation. When no gas flows in the capillary tube, the two groups of thermistor wires have the same temperature, the bridge is balanced, no signal is output, and the corresponding flow value is zero; when gas flows through the capillary tube, the temperature of the upstream thermistor wire and the temperature of the downstream thermistor wire change differently, so that the resistance of the thermistor changes differently, and the measuring bridge outputs a difference signal, and the magnitude of the difference signal is proportional to the mass flow rate flowing through the sensor.
Specifically, in other embodiments of the present utility model, the mass flow sensor 300 may also measure the mass flow of gas using the coriolis force principle. The fluid to be measured is passed through a measuring tube in rotation or vibration, the flow of the fluid in the tube corresponds to a linear motion, the rotation or vibration of the measuring tube generates an angular velocity, and since the rotation or vibration is driven by an applied electromagnetic field and has a fixed frequency, the coriolis force of the fluid in the tube is only related to the mass and the motion velocity, and the product of the mass and the motion velocity, i.e. the flow velocity, is the mass flow to be measured, so that the mass flow can be measured by measuring the coriolis force of the fluid in the tube.
Specifically, in this embodiment, as shown in fig. 2, the gas flow channel of the mass flow sensor 300 includes a throttling flow channel 310 and a measuring flow channel 320, where the gas inlets of the throttling flow channel 310 and the measuring flow channel are mutually communicated, and the gas outlets of the throttling flow channel and the measuring flow channel are mutually communicated, that is, after the gas enters the gas flow channel of the mass flow sensor 300, the gas is split into two flows, one flow passes through the measuring flow channel 320 and is used for measuring the mass flow of the output gas of the electronic regulating valve 200, and the other flow passes through the throttling flow channel 310, and finally, the two flows are converged and then flow out of the flow channel of the mass flow sensor 300. The diameter of the throttling flow passage 310 is reduced and then increased, so that the throttling flow passage is beneficial to blocking gas, and the gas is distributed into the two branch flow passages in proportion, so that the accuracy of mass flow measurement is ensured.
Specifically, in this embodiment, the gas mass flow rate adjusting device further includes a valve seat 500 and a housing 600 covering the valve seat 500, wherein the electronic adjusting valve 200, the mass flow sensor 300 and the gas pressure stabilizing device 100 are all located in the housing 600, the valve seat 500 is provided with gas flow channels required by the three components, and the three components share the valve seat 500; the air inlet of the air inlet flow channel of the electronic regulating valve 200 is the air inlet 510 of the whole gas mass flow regulating device, and the air outlet of the regulated air outlet flow channel 112 of the gas regulating device 100 is the air outlet 520 of the whole gas mass flow regulating device.
More specifically, in the present embodiment, as shown in fig. 2, the valve seat 500 is composed of a seat body of the electronic control valve 200, a base of the mass flow sensor 300, and a lower valve body of the gas pressure stabilizing device 100, and an air inlet channel of the mass flow sensor 300 is communicated with an air outlet channel of the electronic control valve 200, and is sealed with a third seal ring 810; the outlet flow channel of the mass flow sensor 300 is communicated with the pressure-stabilizing inlet flow channel 111 of the gas pressure-stabilizing device 100, and is sealed with a fourth sealing ring 820. The arrangement is convenient for processing the gas flow passages of the electronic regulating valve 200, the mass flow sensor 300 and the gas pressure stabilizing device 100 respectively, and is also convenient for overhauling or replacing the three respectively.
More specifically, in the present embodiment, as shown in fig. 2, the seat body of the electronic regulator valve 200, the base of the mass flow sensor 300, and the lower valve body of the gas pressure stabilizing device 100 are fixedly connected in sequence by the long bolt 530. Of course, in other embodiments of the present utility model, the fixing form is not limited thereto, and it is only necessary to be able to seal and communicate the gas flow passages of the three in order.
Specifically, in the present embodiment, as further shown in fig. 2, the housing 600 is provided with a data connector 700, and the controller 400 is also disposed in the housing 600 and performs data interaction with the outside through the data connector 700.
More specifically, in this embodiment, the data connector 700 is a D-type 7-pin socket. Of course, the form of the data connector 700 is not limited thereto, and the user may select according to specific requirements according to different data interaction requirements.
In summary, the gas mass flow rate adjusting device provided in the embodiment may be applied to an oxygenation occasion, where the gas pressure stabilizing device 100 can ensure that the inlet and outlet of the electronic adjusting valve 200 have a stable oxygen pressure difference, so that the electronic adjusting valve 200 can accurately adjust the mass flow rate of oxygen, and also can ensure that the oxygenation pressure is stable, thereby improving the oxygenation precision; the mass flow sensor 300 can timely measure the mass flow of the oxygen output by the electronic regulating valve 200, so as to obtain the actual oxygen adding amount, and can provide feedback for the electronic regulating valve 200 to correct the mass flow of the oxygen actually output by the electronic regulating valve 200, so as to further improve the oxygen adding precision, that is, the gas mass flow regulating device provided by the embodiment, the electronic regulating valve 200, the mass flow sensor 300 and the gas pressure stabilizing device 100 are mutually matched, so that the mass flow precision of the output gas is greatly improved, and the gas mass flow regulating device provided by the embodiment integrates various functions of regulation, pressure stabilizing, measurement, correction and the like, and can greatly reduce the number of devices arranged on an oxygen adding pipeline.
Of course, the gas mass flow rate adjusting device provided in this embodiment is not limited to application in the oxygenation occasion, but can be applied to other gas supply occasions, and the limitation on the gas pressure, the gas flow rate and the like is relatively small.
The gas mass flow rate can be adjusted by using the gas mass flow rate adjusting device according to the following method, and the method specifically comprises the following steps:
acquiring a set mass flow rate, and adjusting the opening of the electronic regulating valve 200 according to the set mass flow rate;
acquiring a preset pressure difference of an inlet and an outlet of the electronic regulating valve 200 corresponding to the set mass flow and a difference value of gas pressure of the inlet and the outlet of the electronic regulating valve 200, and controlling the energizing current of the pressure stabilizing coil 130 of the gas pressure stabilizing device 100 according to the difference value and the preset pressure difference;
a measurement result of the mass flow sensor 300 is acquired, and the opening degree of the electronic control valve 200 is corrected according to the measurement result.
The gas mass flow rate regulating method is implemented by using the gas mass flow rate regulating device, so that all the beneficial effects of the gas mass flow rate regulating device can be obtained, and the description is omitted.
In addition, the adjusting method also corrects the opening of the electronic adjusting valve 200 according to the measuring result of the mass flow sensor 300, so that the adjusting precision of the electronic adjusting valve 200 can be further improved, and the adjusting method can be applied to the oxygenation occasion, namely, the oxygenation precision can be further improved; and the quality of the actual output gas can be obtained in time and the electronic regulating valve 200 is regulated and corrected, so that the method is applied to the oxygenation occasion, and compared with the method that the oxygenation amount is regulated after the dissolved oxygen in the boiler pipeline is measured through a dissolved oxygen analyzer (usually only after the oxygen is added for at least 20 min), the regulation lag can be effectively avoided, and therefore the oxygenation precision can be ensured.
Finally, it is further noted that relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to the embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. The gas pressure stabilizing device is characterized by comprising a valve body (110), a valve core (120) and a pressure stabilizing coil (130), wherein the valve body (110) is provided with a valve cavity, a pressure stabilizing air inlet flow channel (111) and a pressure stabilizing air outlet flow channel (112); the valve core (120) comprises a pressure stabilizing membrane (121), the pressure stabilizing membrane (121) divides the valve cavity into a first chamber (113) and a second chamber (114) which are mutually independent, and the first chamber (113) can be communicated with an air inlet channel of a part needing pressure stabilizing; the pressure-stabilizing air inlet flow passage (111), the second chamber (114) and the pressure-stabilizing air outlet flow passage (112) are sequentially communicated, and the pressure-stabilizing air inlet flow passage (111) can be communicated with the air outlet flow passage of the part needing pressure stabilization;
the valve core (120) further comprises a movable magnet (122) and a valve needle (123), the movable magnet (122) and the valve needle (123) are fixedly connected and are respectively arranged in the first chamber (113) and the second chamber (114), and the valve needle (123) can seal the stable-pressure air outlet flow channel (112); the voltage stabilizing coil (130) is wound around the moving magnet (122) and is used for driving the moving magnet (122) to move.
2. The gas pressure stabilizing device according to claim 1, wherein the gas pressure stabilizing device (100) further comprises a data processor (140), and a gas source pressure sensor (150) and a pressure stabilizing sensor (160) both connected with the data processor (140), the gas source pressure sensor (150) is used for detecting the gas pressure in the gas inlet channel of the component to be stabilized, and the pressure stabilizing pressure sensor (160) is used for detecting the gas pressure in the gas outlet channel of the component to be stabilized;
the voltage stabilizing coil (130) is also connected with the data processor (140), and the data processor (140) can compare the difference value of the gas pressure measured by the gas source pressure sensor (150) and the voltage stabilizing pressure sensor (160) with a preset pressure difference and adjust the energizing current of the voltage stabilizing coil (130) according to the comparison result.
3. The gas pressure regulating device of claim 2, wherein the predetermined pressure differential is in the range of 0.2-0.6 Mpa and is positively correlated to the nominal flow of gas.
4. A gas mass flow regulating device, characterized by comprising an electronic regulating valve (200) and a gas pressure stabilizing device (100) according to any one of claims 1-3, wherein the gas flow channels are sequentially communicated, and further comprising a controller (400), wherein the electronic regulating valve (200) and the gas pressure stabilizing device (100) are both connected with the controller (400), and the controller (400) can control the electronic regulating valve (200) to act according to a set mass flow and control the gas pressure stabilizing device (100) to act according to a preset pressure difference.
5. The gas mass flow regulating device of claim 4, wherein the electronic regulating valve (200) comprises a needle-type electric regulating valve or an electromagnetic regulating valve.
6. The gas mass flow regulating device according to claim 4 or 5, characterized in that a mass flow sensor (300) is further arranged between the electronic regulating valve (200) and the gas pressure stabilizing device (100), an air inlet flow channel of the mass flow sensor (300) is communicated with an air outlet flow channel of the electronic regulating valve (200), and an air outlet flow channel of the mass flow sensor (300) is communicated with a pressure stabilizing air inlet flow channel (111) of the gas pressure stabilizing device (100) for measuring the mass flow rate of the gas output by the electronic regulating valve (200); the mass flow sensor (300) is also connected with the controller (400), and the controller (400) can correct the action of the electronic regulating valve (200) according to the measurement result of the mass flow sensor (300) so as to ensure that the mass flow of the gas output by the electronic regulating valve is within a preset error range.
7. The gas mass flow regulating device of claim 6, wherein the mass flow sensor (300) measures the mass flow of the gas using capillary heat transfer differential calorimetry principles or the mass flow of the gas using coriolis force principles.
8. The gas mass flow rate regulating device according to claim 6, further comprising a valve seat (500) and a housing (600) covering the valve seat (500), wherein the electronic regulating valve (200), the mass flow sensor (300) and the gas pressure stabilizing device (100) are all located in the housing (600), the valve seat (500) is provided with a gas flow channel required by the three, and the valve seat (500) is shared by the three.
9. The gas mass flow regulating device of claim 8, wherein the housing (600) is provided with a data connector (700), and the controller (400) is also disposed within the housing (600) and is in data communication with the outside via the data connector (700).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321294385.8U CN219975518U (en) | 2023-05-25 | 2023-05-25 | Gas pressure stabilizing device and gas mass flow regulating device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321294385.8U CN219975518U (en) | 2023-05-25 | 2023-05-25 | Gas pressure stabilizing device and gas mass flow regulating device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118423468A (en) * | 2024-07-02 | 2024-08-02 | 湘潭大学 | Electromagnetic valve capable of adjusting outlet flow velocity and pressure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118423468A (en) * | 2024-07-02 | 2024-08-02 | 湘潭大学 | Electromagnetic valve capable of adjusting outlet flow velocity and pressure |
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