Intelligent gas volume flow control device

Abstract

The utility model discloses an intelligent gas volume flow control device, and relates to the technical field of gas volume flow control. The protective device comprises a base body and a mounting plate body clamped at the upper end of the base body, and further comprises a first protective plate clamped at the upper end of the base body, and second protective plates are connected to the left side and the right side of the first protective plate; the locking mechanism is arranged on the upper end face of the base body; the side plate body is fixed to the upper end face of the first protection plate, and a transverse plate body is fixed to the upper end face of the second protection plate. And the gas flow control mechanism is arranged on the upper end face of the mounting plate body. According to the utility model, the gas flow control mechanism is arranged in the case, so that the equipment can detect data such as multi-branch pipeline gas temperature, pipeline gas mass flow, on-site atmospheric pressure, environment temperature and humidity and the like in real time, and the pipeline gas volume flow meeting the set requirement is obtained by adjusting the size of the through hole of the proportional valve in real time; stable gas volume flow is provided for atmosphere detection equipment, and data accuracy of experimental equipment is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas volume flow control, in particular to an intelligent gas volume flow control device. Background Art

[0002] Atmospheric environmental monitoring is the process of measuring the concentration of pollutants in the atmospheric environment, observing and analyzing their changes and impacts on the environment. Atmospheric pollution monitoring is to measure the types and concentrations of pollutants in the atmosphere, and observe their temporal and spatial distribution and change patterns. The molecular pollutants monitored mainly include sulfur oxides, nitrogen oxides, carbon monoxide, ozone, halogenated hydrocarbons, hydrocarbons, etc.; particulate pollutants mainly include dust fall, total suspended particulates, floating dust and acid deposition. Atmospheric quality monitoring is to sample and analyze the main pollutants in the atmosphere of a certain area. Usually, regular monitoring of specified projects is carried out based on factors such as the size of a region, the distribution and source strength of atmospheric pollution sources, meteorological conditions, topography, and landforms.

[0003] A stable sampling flow is required in the atmospheric environment monitoring system. If it is particulate sampling, a certain fixed flow is required to ensure the normal operation of the particulate cutter. In a single-tube to multi-tube monitoring environment, it is necessary to monitor the sample gas volume flow of different branches in real time. In actual monitoring applications, the failure of a branch will cause the entire system to be unable to operate at a normal sampling flow. Due to the continuity and non-repeatability of environmental sampling monitoring, serious losses will be caused. The utility model designs a multi-branch volume flow monitoring system, which can ensure that all application channels can adjust the branch flow in time when unattended, and can automatically enable the backup sampling device when necessary. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the utility model provides an intelligent gas volume flow control device, which can effectively solve the problems of the prior art.

[0005] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] The utility model is an intelligent gas volume flow control device, comprising a base body and a mounting plate body clamped on the upper end of the base body, and also comprising:

[0007] The first protective plate is clamped on the upper end of the base body, and the left and right sides of the first protective plate are connected with the second protective plate;

[0008] A locking mechanism, arranged on the upper end surface of the base body, for locking and limiting the first protective plate and the second protective plate;

[0009] The side plate body is fixed on the upper end surface of the protective plate 1, and the upper end surface of the protective plate 2 is fixed with a transverse plate body, and two sets of the side plate body and the transverse plate body are provided;

[0010] A connecting mechanism, arranged on one side of the protective plate, for connecting the side plate body with the transverse plate body;

[0011] A blocking cover plate is slidably connected to the upper end surfaces of the side plate body and the horizontal plate body to block the two;

[0012] An air inlet is connected to an upper end of one side of the horizontal plate body, and a particle filter is connected to the inner side of the air inlet;

[0013] The gas flow control mechanism is arranged on the upper end surface of the mounting plate and is used to detect and control the gas volume.

[0014] Furthermore, the locking mechanism includes a connecting slide groove, a limiting card groove and a limiting protrusion. The connecting slide groove is a rectangular structure evenly opened on the upper end surface of the base body, and the protective plate one and the protective plate two are embedded in the connecting slide groove. The limiting card groove is opened on the inner side of the connecting slide groove, and the limiting protrusion is fixed on the lower end surface of the protective plate one and the protective plate two and is clamped with the limiting card groove.

[0015] Furthermore, locking pieces are symmetrically arranged on the left and right sides of the upper end surface of the base body, and the lower end surface of the locking piece is connected to a locking rod, and the locking piece can rotate along the locking rod as the axis and clamp the protective plate one and the protective plate two.

[0016] Furthermore, the connecting mechanism includes a locking slot and a connecting protrusion. The locking slot is symmetrically opened at the lower ends of the left and right sides of the protective plate one, and the cross-section of the locking slot is a "T"-shaped structure. The connecting protrusion is fixed on the left and right sides of the protective plate one and the connecting protrusion is slidably embedded in the interior of the protective plate two.

[0017] Furthermore, a connecting screw is fixed to the upper end faces of the protective plate 1 and the protective plate 2, and the connecting screw extends into the interior of the blocking cover plate. The upper end faces of the blocking cover plate are evenly provided with locking nuts, and the locking nuts are fitted on the upper end faces of the blocking cover plate and connected to the connecting screw.

[0018] Furthermore, the inner walls of the protective plate 1 and the protective plate 2 are evenly fixed with reinforcing ribs, and the reinforcing ribs are arc-shaped structures and extend into the interior of the mounting plate body. The mounting plate body is evenly fixed on the lower end surface of the reinforcing rod, and a locking groove is opened at the central position of the upper end surface of the base body, and the locking groove is clamped with the reinforcing rod.

[0019] Furthermore, the gas flow control mechanism includes a three-way connector 1, a mass flow meter, a proportional solenoid valve, a temperature sensor, a three-way connector 2, a pressure sensor, an extended negative pressure pipeline 1, an extended negative pressure pipeline 2, a vacuum pump and a muffler. The three-way connector 1 is connected to one end of the particulate filter, the mass flow meter is connected to one end of the three-way connector 1, the temperature sensor is connected to the other end of the three-way connector 1, the proportional solenoid valve is connected to one end of the mass flow meter, the three-way connector 2 is connected to the tail end of the proportional solenoid valve, the pressure sensor is connected to the other end of the three-way connector 2, the extended negative pressure pipeline 1 and the extended negative pressure pipeline 2 are arranged on the side of one end of the horizontal plate body away from the air inlet, and an instrument is arranged between the extended negative pressure pipeline 1 and the extended negative pressure pipeline 2, the vacuum pump is fixed to the upper end surface of the mounting plate body, and the muffler is connected to one end of the vacuum pump.

[0020] Furthermore, all connecting components in the gas flow control mechanism are connected through air pipes.

[0021] Furthermore, a connection port body is provided at the lower end of the horizontal plate body, an external temperature detection sensor is sleeved on the outer side of the connection port body, and a signal input and output interface is connected to one side of the connection port body.

[0022] Furthermore, a power source is fixed on the upper end surface of the mounting plate body, and a display and control module is arranged on the surface of the other group of horizontal plates.

[0023] The utility model has the following beneficial effects:

[0024] 1. The utility model is installed in a chassis through a gas flow control mechanism, which enables the equipment to detect multi-branch pipeline gas temperature, pipeline gas mass flow, on-site atmospheric pressure, ambient temperature and humidity and other data in real time. By adjusting the through-hole size of the proportional valve in real time, the required pipeline gas volume flow rate is obtained, providing a stable gas volume flow rate for the atmospheric detection equipment, ensuring the data accuracy of the experimental equipment.

[0025] 2. The utility model can limit the position of the protective plate 1 and the protective plate 2 by cooperating with the connecting slide groove and the limiting slot, and then the locking slot can connect the protective plate 1 and the protective plate 2, and at the same time, the protective plate 1 and the protective plate 2 can be locked by the locking member to ensure the subsequent connection effect of the device, and then, the connecting screw rod and the locking nut can cooperate to seal the side plate body and the cross plate body through the blocking cover plate, and the chassis can be quickly disassembled to facilitate the subsequent inspection and maintenance of the various components in the chassis. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 It is a top view schematic diagram of the intelligent gas volume flow control device of the utility model;

[0028] Figure 2 This is a schematic diagram of the chassis connection of the utility model;

[0029] Figure 3 For this utility model Figure 2 A partial enlarged schematic diagram in the middle;

[0030] Figure 4 This is an internal schematic diagram of the intelligent gas volume flow control device of the utility model;

[0031] Figure 5 This is a schematic diagram of the gas flow control mechanism of the utility model;

[0032] Figure 6 This is a bottom view schematic diagram of the intelligent gas volume flow control device of the utility model;

[0033] Figure 7 This is a schematic diagram of the locking member of the utility model;

[0034] Figure 8 This is a flow chart of the gas flow control mechanism of the utility model.

[0035] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0036] 1. Base body; 2. Connecting slide; 3. Limiting card slot; 4. Protective plate 1; 401, limiting protrusion; 5. Locking card slot; 6. Protective plate 2; 7. Side plate body; 8. Connecting protrusion; 9. Horizontal plate body; 10. Connecting screw rod; 11. Blocking cover plate; 12. Locking nut; 13. Locking piece; 1301, Locking rod; 14. Reinforcement rib; 15. Mounting plate body; 16. Reinforcement rod; 17. Locking groove; 18. Air inlet; 19 , particulate filter; 20, three-way connector one; 21, mass flow meter; 22, proportional solenoid valve; 23, temperature sensor; 24, three-way connector two; 25, pressure sensor; 26, extended negative pressure pipeline one; 27, extended negative pressure pipeline two; 28, vacuum pump; 29, silencer; 30, connection port body; 31, external temperature detection sensor; 32, signal input and output interface; 33, power supply; 34, display and control module. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0038] See also Figure 1-8 As shown, the utility model is an intelligent gas volume flow control device, comprising a base body 1 and a mounting plate body 15 clamped on the upper end of the base body 1, and also comprising:

[0039] A protective plate 1 4 is clamped on the upper end of the base body 1, and the left and right sides of the protective plate 1 4 are connected with protective plates 2 6;

[0040] A locking mechanism is provided on the upper end surface of the base body 1 and is used to lock and limit the protective plate 1 4 and the protective plate 2 6;

[0041] The side plate body 7 is fixed on the upper end surface of the protective plate 1 4, and the upper end surface of the protective plate 2 6 is fixed with a horizontal plate body 9, and the side plate body 7 and the horizontal plate body 9 are provided with 2 groups;

[0042] A connecting mechanism, arranged on one side of the protective plate 4, for connecting the side plate body 7 with the horizontal plate body 9;

[0043] The blocking cover plate 11 is slidably engaged with the upper end surfaces of the side plate body 7 and the horizontal plate body 9 to block the two;

[0044] An air inlet 18 is connected to an upper end of one side of the horizontal plate body 9, and a particle filter 19 is connected to the inner side of the air inlet 18;

[0045] The gas flow control mechanism is arranged on the upper end surface of the mounting plate 15 and is used to detect and control the gas volume.

[0046] The locking mechanism includes a connecting slot 2, a limiting card slot 3 and a limiting protrusion 401. The connecting slot 2 is a rectangular structure and is evenly arranged on the upper end surface of the base body 1, and the protective plate 1 4 and the protective plate 2 6 are embedded in the connecting slot 2. The limiting card slot 3 is arranged on the inner side of the connecting slot 2. The limiting protrusion 401 is fixed to the lower end surface of the protective plate 1 4 and the protective plate 2 6 and is engaged with the limiting card slot 3. By setting the connecting slot 2 as a rectangular structure, the protective plate 1 4 and the protective plate 2 6 can be embedded in the connecting slot 2 to ensure the connection effect of the connecting slot 2. Then, the limiting protrusion 401 at the lower end of the protective plate 1 4 and the protective plate 2 6 can be engaged with the limiting card slot 3, which can prevent the protective plate 1 4 and the protective plate 2 6 from shaking, thereby affecting subsequent processing. The left and right sides of the upper end surface of the base body 1 are symmetrically provided with locking pieces 13, and the lower end surface of the locking piece 13 is connected to a locking rod 1301, and the locking piece 13 can rotate along the locking rod 1301 as the axis and snap the protective plate 1 4 with the protective plate 2 6. The locking piece 13 is an elliptical structure, and then the locking rod 1301 can make the locking piece 13 rotate, and the locking piece 13 can snap with the inner wall of the protective plate 2 6, which can ensure the tightness of the connection between the protective plate 2 6 and the connecting slide 2 to prevent the protective plate 2 6 from falling. At the same time, the locking piece 13 can be adjusted to facilitate the subsequent disassembly and installation of the protective plate 2 6. The connecting mechanism includes a locking card slot 5 and a connecting protrusion 8. The locking card slot 5 is symmetrical The locking slot 5 is provided at the lower ends of the left and right sides of the protective plate 1 4, and the cross section of the locking slot 5 is a "T"-shaped structure. The connecting protrusions 8 are fixed on the left and right sides of the protective plate 1 4 and the connecting protrusions 8 are slidably embedded in the inside of the protective plate 2 6. The protective plate 2 6 can be slidably connected from top to bottom in the locking slot 5 inside the protective plate 1 4, which can prevent the protective plate 2 6 from being offset. The cross section of the locking slot 5 is a "T"-shaped structure, which can ensure the connection effect between the protective plate 1 4 and the protective plate 2 6. At the same time, the connecting protrusions 8 can ensure the tightness of the connection between the protective plate 1 4 and the protective plate 2 6, and prevent dust and dirt from entering the protective plate 1 4 and the protective plate 2 6, which may cause damage to the gas flow control mechanism.

[0047] A connecting screw 10 is fixed to the upper end surface of the protective plate 14 and the protective plate 2 6, and the connecting screw 10 extends to the inside of the blocking cover plate 11. The upper end surface of the blocking cover plate 11 is evenly provided with a locking nut 12, and the locking nut 12 fits on the upper end surface of the blocking cover plate 11 and is connected to the connecting screw 10. The connecting screw 10 provided can penetrate into the inside of the blocking cover plate 11, and the blocking cover plate 11 can block the protective plate 14 and the protective plate 2 6. Subsequently, the locking nut 12 can be screwed on the outside of the connecting screw 10, thereby limiting the locking of the blocking cover plate 11, and avoiding the blocking cover plate 11 from deflecting. The blocking cover plate 11 can block and cover the side plate body 7 and the cross plate body 9 to ensure its subsequent processing. The inner walls of the protective plate 14 and the protective plate 2 6 are evenly fixed with reinforcing ribs 14, and the reinforcing ribs 14 are arc-shaped structures and are installed The plate body 15 is extended inside, and the mounting plate body 15 is evenly fixed on the lower end surface of the reinforcing rod 16. A locking groove 17 is provided at the central position of the upper end surface of the base body 1, and the locking groove 17 is clamped with the reinforcing rod 16. The reinforcing ribs 14 are arc-shaped, which can not only strengthen the hardness of the side plate body 7 and the cross plate body 9, but also limit the mounting plate body 15, and avoid the displacement of the mounting plate body 15. At the same time, the reinforcing rod 16 is evenly fixed on the lower end of the mounting plate body 15, and the reinforcing rod 16 can be slidably clamped on the inner side of the locking groove 17, which can further limit the position of the mounting plate body 15. Then, due to the gap between the mounting plate body 15 and the base body 1, the air vents provided on the outer side of the side plate body 7 can make the gas circulate quickly, so as to facilitate the subsequent heat dissipation of the gas flow control mechanism, and avoid the damage of various components caused by overheating.

[0048] The gas flow control mechanism includes a three-way connector 20, a mass flow meter 21, a proportional solenoid valve 22, a temperature sensor 23, a three-way connector 24, a pressure sensor 25, an extended negative pressure pipeline 1 26, an extended negative pressure pipeline 2 27, a vacuum pump 28 and a muffler 29. The three-way connector 20 is connected to one end of the particulate filter 19, the mass flow meter 21 is connected to one end of the three-way connector 20, and is connected in series in the pipeline to detect the mass flow of the gas in the pipeline in real time, and feedback the flow data by outputting a 1-5V analog voltage signal. The temperature sensor 23 is connected to the other end of the three-way connector 20. The lower end of the horizontal plate body 9 is provided with a connection port body 30, and the connection port body 30 The outer sleeve is connected to an external temperature detection sensor 31, and one side of the connection port body 30 is connected to a signal input and output interface 32. The device is equipped with two sets of temperature detection modules. The temperature sensor 23 is installed in the device pipeline to monitor the pipeline gas temperature, and the external temperature detection sensor 31 can be connected to the outdoors to detect the temperature of the outdoor environment. The flow rate is corrected using the temperature at different positions according to actual needs. The proportional solenoid valve 22 is connected to one end of the mass flow meter 21. By adjusting its power supply duty cycle, the valve body pore is controlled to adjust the gas flow rate. This component is a key component for controlling the gas flow rate. The three-way connector 24 is connected to the tail end of the proportional solenoid valve 22. The pressure The force sensor 25 is connected to the other end of the three-way connector 24, and the atmospheric pressure sensor 25 obtains the atmospheric pressure of the environment in which the device is located to ensure its subsequent processing. The extended negative pressure pipeline 1 26 and the extended negative pressure pipeline 2 27 are arranged on the side of the end of the horizontal plate body 9 away from the air inlet 18, and an instrument is arranged between the extended negative pressure pipeline 1 26 and the extended negative pressure pipeline 2 27. The vacuum pump 28 is fixed on the upper end surface of the mounting plate body 15, and is an airflow generating device, which provides a basic airflow source for the atmospheric environment monitoring system. Vacuum pumps with different negative pressure capacities can be configured according to actual application requirements. The muffler 29 is connected to one end of the vacuum pump 28. The set muffler 29 can reduce the vacuum to a certain extent. The noise generated by the pump 28 makes the equipment more energy-saving and environmentally friendly. All the connecting parts in the gas flow control mechanism are connected through air pipes. A power supply 33 is fixed on the upper end surface of the mounting plate 15. The surface of the other group of horizontal plate 9 is provided with a display and control module 34. The main chip in the display and control module 34 uses STM32F103, in which the ADC is used to collect the analog output of the gas mass flow meter 21; PWM is used for the control signal of the proportional solenoid valve 22; and it is matched with several IO ports for controlling the pump and the feedback flow signal, the access of external control signals, etc.; one serial port communicates with the 5-inch screen; the second serial port communicates with the temperature and humidity sensor; and the third serial port is used for external communication of the device. The main control board can set the flow rate of the device, the working time of the device and record relevant data.

[0049] Working principle: First, the base body 1 needs to be placed in the designated position, and the protective plate 2 6 can be slid from top to bottom and clamped in the locking groove 5 inside the protective plate 1 4, and the provided connecting protrusion 8 can make the side plate body 7 and the horizontal plate body 9 connected more tightly, and then, the protective plate 1 4 and the protective plate 2 6 are slid and clamped in the connecting slide groove 2, and the limiting protrusion 401 at the lower end of the protective plate 1 4 and the protective plate 2 6 can be clamped with the limiting groove 3, which can prevent the protective plate 1 4 and the protective plate 2 6 from shaking, and when the locking member 13 is rotated, the locking member 13 can be rotated along the axis of the locking rod 1301, so that the position of the protective plate 1 4 and the protective plate 2 6 can be locked and limited;

[0050] Subsequently, the mounting plate 15 is slidably engaged in the locking groove 17 at the upper end of the base body 1, and the reinforcing rod 16 can limit the position of the mounting plate 15, and the reinforcing rib 14 can ensure the stability of the mounting plate 15, and then the particulate filter 19 is installed in the air inlet 18, and the particulate filter 19, the three-way connector 1 20, the mass flow meter 21, the proportional solenoid valve 22, the three-way connector 24, the extended negative pressure pipeline 1 26, the extended negative pressure pipeline 2 27, the vacuum pump 28 and the muffler 29 are connected in series through the air pipe. At the same time, the instruments are connected in series at the connection between the extended negative pressure pipeline 1 26 and the extended negative pressure pipeline 2 27 for subsequent processing, and then the temperature is The sensor 23 and the pressure sensor 25 are distributed and inserted into the three-way connector 1 20 and the three-way connector 2 24 for subsequent detection. At the same time, the external temperature detection sensor 31 is connected to the connection port body 30. Then, the signal input and output interface 32 can be connected to an external display device to facilitate remote control by the staff. Finally, the upper ends of the side plate body 7 and the horizontal plate body 9 are covered by the blocking cover 11, and the connecting screw 10 can pass through the blocking cover 11, and then the blocking cover 11 can be locked by the locking nut 12. Since the base body 1, the side plate body 7, the horizontal plate body 9 and the blocking cover 11 can be disassembled, it is convenient for subsequent staff to perform maintenance and repair;

[0051] When in use, the vacuum pump 28 can guide the gas from the air inlet 18, and then the particulate filter 19 can filter it. Then, it can be diverted by the three-way connector 20, and the mass flow rate of the gas in the pipeline can be detected in real time by the gas mass flow meter 21, and the flow data can be fed back by outputting a 1-5V analog voltage signal. Then, the temperature sensor 23 connected to one side of the three-way connector 20 can detect the temperature of the gas in the trachea. Then, the proportional solenoid valve 22 connected to the gas mass flow meter 21 adjusts its power supply duty cycle, and then controls the valve body pores to adjust the gas flow. The amount is then connected to the extended negative pressure pipe 1 26 by the three-way connector 24, and is guided to the vacuum pump 28 through the instrument and the extended negative pressure pipe 27. Subsequently, the pressure sensor 25 connected to the three-way connector 24 obtains the atmospheric pressure of the environment in which the device is located to ensure its subsequent processing. At the same time, the external temperature detection sensor 31 can be connected to the outdoors to detect the temperature of the outdoor environment. The temperature at different positions is used to correct the flow according to actual needs. The information is transmitted through the signal input and output interface 32, and the display and control module 34 can display the information.

[0052] Finally, this device also has a multi-connection device, the method is as follows:

[0053] The single-machine flow control device is configured according to the multi-branch requirements, and one branch is usually added at the end for redundant flow adjustment. The working address of each device is set, RS485 is used for communication, and one is designated as the host for overall control, sending the calibration clock, and monitoring the working status of the other extensions.

[0054] The specific working process is as follows:

[0055] Assume that a sampling monitoring system is equipped with four particulate sampling devices. In order to ensure that the samples come from the same inlet, it is equipped with a 16.7L / min particulate cutter. The actual working flow of each device is only 1L / min. To ensure smooth sampling, 5 stand-alone flow control devices are equipped. Different control flows are designed for each branch according to the equal speed requirements of each branch, and the last branch is designated as the host for redundant flow control. In order to ensure that the total sampling flow remains unchanged, the host periodically checks the flow of each device. When the branch flow cannot meet the requirements, the host redundant gas flow is increased in time to ensure the stability of the total sampling flow.

[0056] And the volume flow control method of the device

[0057] 1. Volume flow rate: Volume flow rate refers to the volume of gas passing through a given cross-sectional area per unit time. It is usually expressed in volume units, such as cubic meters per second m³ / s or cubic feet per minute ft³ / min.

[0058] Volume flow rate is related to temperature and atmospheric pressure because the volume of a gas changes at different temperatures and atmospheric pressures.

[0059] Mass flow rate: Mass flow rate is the mass of gas passing through a given cross-sectional area per unit time. It is usually expressed in mass units, such as kilograms per second (kg / s) or pounds per hour (lb / hr). Mass flow rate is not affected by temperature because it depends only on the mass of the gas.

[0060] According to the ideal gas law, the conversion formula between volume flow rate and mass flow rate is as follows:

[0061] Qv = Qm * (T / T0)*(P0 / P)

[0062] in,

[0063] Qv is the volume flow rate, which is the flow rate that the device is trying to control.

[0064] Qm is the mass flow rate, and the device obtains this data through a mass flow meter

[0065] T is the current temperature, expressed in Kelvin, and the device obtains this data through a temperature sensor

[0066] T0 is the reference temperature, which is the temperature under standard conditions, 273.15 K

[0067] P is the current atmospheric pressure, which is obtained through the atmospheric pressure sensor

[0068] P0 standard atmospheric pressure, 101.325 kPa

[0069] According to the formula, volume flow is proportional to temperature and inversely proportional to atmospheric pressure, provided that the mass flow remains constant.

[0070] In short, the relationship between volume flow and mass flow is also related to the temperature and atmospheric pressure of the gas. To convert between the two, you need to know the mass flow, temperature and atmospheric pressure and use the above formula to calculate.

[0071] Therefore, this device uses this principle to obtain the mass flow parameters of the airway through a mass flow meter, combines the temperature and atmospheric pressure parameters to calculate the real-time volume flow, and then changes the gas flow in the airway by adjusting the through-hole size of the proportional solenoid valve, so that the flow in the airway of the device reaches and is maintained at the volume flow set by the user.

[0072] The above are only preferred embodiments of the present invention and do not limit the present invention. Any modification to the technical solutions recorded in the aforementioned embodiments and any equivalent replacement of some of the technical features therein, any modification, equivalent replacement, and improvement made are all within the protection scope of the present invention.

Claims

1. An intelligent gas volume flow control device, comprising a base body (1) and a mounting plate body (15) clamped on the upper end of the base body (1), characterized in that: Also includes: A protective plate 1 (4) is clamped on the upper end of the base body (1), and a protective plate 2 (6) is connected to the left and right sides of the protective plate 1 (4); A locking mechanism, arranged on the upper end surface of the base body (1), used to lock and restrict the first protective plate (4) and the second protective plate (6); The side plate body (7) is fixed to the upper end surface of the first protective plate (4), and the upper end surface of the second protective plate (6) is fixed with a transverse plate body (9), and two groups of the side plate body (7) and the transverse plate body (9) are provided; A connecting mechanism, arranged on one side of the protective plate 1 (4), and used for connecting the side plate body (7) and the transverse plate body (9); A blocking cover plate (11) is slidably engaged with the upper end surfaces of the side plate body (7) and the transverse plate body (9) to block the two; An air inlet (18) is connected to an upper end of one side of the horizontal plate body (9), and a particle filter (19) is connected to the inner side of the air inlet (18); The gas flow control mechanism is arranged on the upper end surface of the mounting plate (15) and is used to detect and control the gas volume.

2. The intelligent gas volume flow control device according to claim 1, characterized in that: The locking mechanism comprises a connecting slide groove (2), a limiting slot (3) and a limiting protrusion (401); the connecting slide groove (2) is a rectangular structure evenly arranged on the upper end surface of the base body (1); the protective plate 1 (4) and the protective plate 2 (6) are embedded in the connecting slide groove (2); the limiting slot (3) is arranged on the inner side of the connecting slide groove (2); and the limiting protrusion (401) is fixed on the lower end surfaces of the protective plate 1 (4) and the protective plate 2 (6) and is clamped with the limiting slot (3).

3. The intelligent gas volume flow control device according to claim 2, characterized in that: The upper end surface of the base body (1) is symmetrically provided with locking pieces (13) on both sides, and the lower end surface of the locking piece (13) is connected to a locking rod (1301). The locking piece (13) can rotate along the locking rod (1301) as the axis and clamp the protective plate 1 (4) and the protective plate 2 (6).

4. The intelligent gas volume flow control device according to claim 2, characterized in that: The connection mechanism comprises a locking slot (5) and a connection protrusion (8); the locking slot (5) is symmetrically arranged at the lower ends of the left and right sides of the protective plate (4); and the cross section of the locking slot (5) is a "T"-shaped structure; the connection protrusion (8) is fixed to the left and right sides of the protective plate (4) and the connection protrusion (8) is slidably embedded in the interior of the protective plate (6).

5. The intelligent gas volume flow control device according to claim 1, characterized in that: A connecting screw (10) is fixed to the upper end surfaces of the protective plate 1 (4) and the protective plate 2 (6), and the connecting screw (10) extends into the interior of the blocking cover plate (11). Locking nuts (12) are evenly arranged on the upper end surface of the blocking cover plate (11), and the locking nuts (12) are fitted on the upper end surface of the blocking cover plate (11) and connected to the connecting screw (10).

6. The intelligent gas volume flow control device according to claim 1, characterized in that: The inner walls of the protective plate 1 (4) and the protective plate 2 (6) are evenly fixed with reinforcing ribs (14), and the reinforcing ribs (14) are arc-shaped structures and extend into the interior of the mounting plate body (15). The mounting plate body (15) is evenly fixed to the lower end surface of the reinforcing rod (16). A locking groove (17) is provided at the center of the upper end surface of the base body (1), and the locking groove (17) is engaged with the reinforcing rod (16).

7. The intelligent gas volume flow control device according to claim 1, characterized in that: The gas flow control mechanism comprises a three-way connector (20), a mass flow meter (21), a proportional solenoid valve (22), a temperature sensor (23), a three-way connector (24), a pressure sensor (25), an extended negative pressure pipeline (26), an extended negative pressure pipeline (27), a vacuum pump (28) and a muffler (29), wherein the three-way connector (20) is connected to one end of the particle filter (19), the mass flow meter (21) is connected to one end of the three-way connector (20), the temperature sensor (23) is connected to the other end of the three-way connector (20), and the proportional solenoid valve (22) is connected to the temperature sensor (23). (22) is connected to one end of the mass flow meter (21), three-way connector 2 (24) is connected to the tail end of the proportional solenoid valve (22), the pressure sensor (25) is connected to the other end of the three-way connector 2 (24), the extended negative pressure pipeline 1 (26) and the extended negative pressure pipeline 2 (27) are arranged on the side of one end of the horizontal plate body (9) away from the air inlet (18), and an instrument is arranged between the extended negative pressure pipeline 1 (26) and the extended negative pressure pipeline 2 (27), the vacuum pump (28) is fixed to the upper end surface of the mounting plate body (15), and the muffler (29) is connected to one end of the vacuum pump (28).

8. The intelligent gas volume flow control device according to claim 7, characterized in that: All the connecting components in the gas flow control mechanism are connected through an air pipe.

9. The intelligent gas volume flow control device according to claim 7, characterized in that: A connection port body (30) is provided at the lower end of the horizontal plate body (9); an external temperature detection sensor (31) is sleeved and connected to the outer side of the connection port body (30); and a signal input and output interface (32) is connected to one side of the connection port body (30).

10. The intelligent gas volume flow control device according to claim 7, characterized in that: A power source (33) is fixed to the upper end surface of the mounting plate body (15), and a display and control module (34) is provided on the surface of the other set of horizontal plate bodies (9).

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