CN209131763U - A kind of explosion-proof digital gas mass flow meter - Google Patents
A kind of explosion-proof digital gas mass flow meter Download PDFInfo
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- CN209131763U CN209131763U CN201822129224.9U CN201822129224U CN209131763U CN 209131763 U CN209131763 U CN 209131763U CN 201822129224 U CN201822129224 U CN 201822129224U CN 209131763 U CN209131763 U CN 209131763U
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Abstract
The utility model relates to a kind of explosion-proof digital gas mass flow meters, including meter body, meter body is equipped with air inlet and air outlet, the measuring pressure passage for air inlet and air outlet to be connected is equipped in meter body, measuring pressure passage includes the first measuring pressure passage set gradually along gas flow direction, second measuring pressure passage and third measuring pressure passage, the internal diameter of first measuring pressure passage is greater than the internal diameter of third measuring pressure passage, first measuring pressure passage is connect with air inlet, meter body is equipped with first pressure sensor at corresponding first measuring pressure passage, meter body is equipped with second pressure sensor at corresponding second measuring pressure passage, meter body is equipped with third pressure sensor at corresponding third measuring pressure passage, meter body is equipped with the deceleration channel for third measuring pressure passage and gas outlet to be connected.By using above scheme, gas flow can be tested, the flow velocity of gas can be reduced after detection again, structure is simple, more compact.
Description
Technical field
The utility model relates to oil gas flow monitoring field, especially a kind of explosion-proof digital gas mass flow meter.
Background technique
In the fuel loading system of gas station, oil storage tank stores gasoline, then carries out refueling operation by fuel charger, is carrying out
When oiling, oil storage tank can be discharged with gasoline in the gas in oil storage tank, in order to be maintained at gas in oil storage tank and gasoline
It in certain data area, needs to recycle the oil gas gas of fuel charger, generallys use gas flowmeter detection fuel charger recycling
Oil gas gas flow, to control the gas flow recycled into oil storage tank, general gas flow flowmeter is designed using venturi principle, when
Gas or liquid flow inside Venturi tube, and at the most narrow place of pipeline, dynamic pressure (velocity head) reaches maximum value, static pressure
Power (Resting Pressure) reaches the speed of minimum value gas (liquid) and rises because through flow cross section area reduces.Entirely shove
Pipe reductions process will be undergone within the same time, thus pressure also reduces in the same time.And then pressure difference is generated, this
Pressure difference is for measuring or providing an external suction to fluid.For perfect fluid (gas or liquid, it is incompressible
Rub with not having), pressure difference is obtained by Bernoulli equation, and then can obtain the flow of gas.
However when gas enters from the entrance of Venturi tube, gas can be discharged by the jet pipe of section very little, at this time gas
The flow velocity of body is very big, if flowed directly into oil storage tank, will cause the variation of air pressure in oil storage tank, generates security risk, usually
It needs to connect longer tracheae in the outlet of Venturi tube, for reducing the flow velocity of gas, so structure is complicated, tracheae meeting
Occupy biggish space.
Summary of the invention
The utility model overcomes the deficiencies in the prior art, provides a kind of explosion-proof digital gas mass flow meter,
It can test gas flow, can reduce the flow velocity of gas after detection again, structure is simple, more compact.
To achieve the goals above, the technical solution adopted in the utility model is: a kind of explosion-proof digital gaseous mass
Flowmeter, including meter body, the meter body are equipped with air inlet and air outlet, are equipped in the meter body for leading
The measuring pressure passage of logical air inlet and air outlet, the measuring pressure passage include that the first survey pressure set gradually along gas flow direction is led to
Road, the second measuring pressure passage and third measuring pressure passage, the internal diameter of the first measuring pressure passage are greater than the internal diameter of third measuring pressure passage, and first surveys
Pressure passageway is connect with air inlet, and the meter body is equipped with first pressure sensor, the stream at corresponding first measuring pressure passage
Meter body is equipped with second pressure sensor at corresponding second measuring pressure passage, and the meter body is at corresponding third measuring pressure passage
Equipped with third pressure sensor, the air inlet and air outlet are arranged on the same side of meter body, set in meter body
There is the deceleration channel for third measuring pressure passage and gas outlet to be connected.
By using above scheme, the first measuring pressure passage and third measuring pressure passage are cylindrical channel, and first, which surveys pressure, leads to
The internal diameter in road is greater than the internal diameter of third measuring pressure passage, the conical setting of the second measuring pressure passage, the both ends point of the second measuring pressure passage
It is not connect with the first measuring pressure passage and third measuring pressure passage, gas flows successively through the first measuring pressure passage, the second measuring pressure passage and
The flow velocity of three measuring pressure passages, gas is getting faster, the gas pressure that first pressure sensor can be used at the first measuring pressure passage, the
The gas pressure that two pressure sensors can be used at the second measuring pressure passage, third pressure sensor can be used at third measuring pressure passage
Gas pressure, measuring pressure passage is designed by the principle of venturi, the pressure difference of measuring pressure passage is obtained by Bernoulli equation
, and then can obtain the flow of gas, since air inlet and air outlet are arranged on the same side of meter body, although gas
The just fast speed of the second measuring pressure passage of outflow, but gas is back to gas outlet by deceleration channel, since deceleration channel has
There is certain stroke, gas can gradually slow down, and speed is greatly lowered when reaching gas outlet, and deceleration channel is integrally disposed upon flow
In vivo, structure is simple, and structure is more compact for meter.
The utility model is further arranged so that the deceleration channel includes storage circulation road, air storing cavity and outlet channel, institute
Storage circulation road is stated into horn-like setting, the osculum for storing up circulation road is connect with third measuring pressure passage, stores up big mouth and the gas storage of circulation road
Chamber connection, outlet channel are equipped with first partition, measuring pressure passage, storage in the meter body for being connected to air storing cavity and gas outlet
Circulation road and air storing cavity are located at the upside of the first isolation board, and outlet channel is located at the downside of the first isolation board, on the first isolation board
Equipped with the flow channels for being connected to air storing cavity Yu outlet channel.
By using above scheme, circulation road is stored up at horn-like setting, when gas flows through, since the bore of storage circulation road is got over
Come bigger, the flow velocity of gas can slow down, and air storing cavity is at cylinder design, and internal diameter is suitable with the internal diameter of the first measuring pressure passage, gas
Know from experience and flow into outlet channel by flow channels, form U-shaped reflux, can not only achieve the effect that deceleration in this way, and it is logical to slow down
Road it is reasonable in design, take full advantage of the space of meter body, structure is also further simplified, easy to process.
The utility model is further arranged so that the meter body is equipped with second partition at outlet channel, described outer
It arranges channel and flat zone and buffer area is divided by second partition, flat zone is connected to air storing cavity, and buffer area is connected to gas outlet, and second
Partition is equipped with the first through hole for flat zone and buffer area to be connected.
By using above scheme, the volume of flat zone and buffer area is larger, when gas flows into when flat zone, passes through second
The effect of partition, the flow velocity of mitigation of gases, gas flow into buffer area from first through hole again, and the flow velocity of gas, which further walks, to be subtracted
It is slow, reach minimum, gas flows out from gas outlet again.
Further being arranged so that in the meter body for the utility model is additionally provided with third partition, the measuring pressure passage position
In the downside of third partition, third partition is equipped with the first mounting plate for the installation of each pressure sensor, sets on third partition
There is the mounting groove with the first mounting plate shape adaptation, third partition is equipped at corresponding first pressure sensor and passes for first pressure
The pressure test head of sensor protrudes into the second through-hole of the first measuring pressure passage, and third partition is equipped at corresponding second pressure sensor
The third through-hole of the second measuring pressure passage is protruded into for the pressure test head of second pressure sensor, third partition is in corresponding third pressure
The fourth hole that third measuring pressure passage is protruded into for the pressure test head of third pressure sensor, the first mounting plate are equipped at sensor
Cooperate with the sealing bottom surface of mounting groove.
By using above scheme, the main part of each pressure sensor is installed on the first mounting plate, Ge Gejian
Gauge head passes through each through-hole respectively and protrudes into measuring pressure passage, is carried out between each pressure sensor and each through-hole by sealing ring
Seal operation avoids gas leakage, and pressure sensor installation is stablized, and assembly is simple.
The utility model is further arranged so that the meter body is fixedly installed circuit board on third partition, electricity
Road plate is connect with each pressure sensor respectively, and temperature sensor, temperature sensor and electricity are also equipped on the third partition
The connection of road plate, the detector of temperature sensor are arranged in third partition and protrude into air storing cavity.
By using above scheme, circuit board is connect with each pressure sensor respectively, and circuit board can acquire each pressure
The detection signal of sensor, to calculate the flow of gas, since gas is after measuring pressure passage, temperature rises, temperature
Sensor can be used for the temperature of detection gas, and Real-time Feedback avoids the gas of higher temperature from flowing into oil storage tank to staff.
The utility model is further arranged so that the temperature sensor is mounted on third partition by the second mounting plate
On, the second mounting plate is fixed on third partition by epoxy resin AB glue, and the first mounting plate is fixed by epoxy resin AB glue
On mounting groove, the third partition is equipped with the stepped hole worn for temperature sensor, is equipped with positioning sleeve at stepped hole, temperature
Degree sensor is arranged in positioning sleeve, and the upper surface of positioning sleeve and the second mounting plate are inconsistent, the lower end surface of positioning sleeve and stepped hole
End face between be folded with sealing ring.
By using above scheme, epoxy resin AB glue is the Bi-component high-temperature resistant adhesive by epoxy resin for base, main
To be suitable for the splicing of refractory metal, ceramics etc., the first mounting plate and the second mounting plate pass through epoxy resin AB glue glue respectively
It connects on third partition, installation is stablized, and positioning sleeve is plastic sheath, and heat resistance is preferable, and will not conduct heat, and positioning sleeve will be close
Seal is pressed on stepped hole, and operation can be sealed to stepped hole, and structure is simple, and installation is stablized.
Further being arranged so that in the meter body for the utility model is additionally provided with waterproof connector, waterproof connector and stream
The sealing of meter body cooperates, and is equipped with cable on waterproof connector, cable is connect with circuit board.
By using above scheme, cable is arranged in waterproof connector, and connect with circuit board, can to circuit board power and
Signal is transmitted, waterproof connector not only seals cooperation between meter body, and cooperates with cable seal, plays good waterproof
Effect.
The utility model is further described with reference to the accompanying drawing.
Detailed description of the invention
Fig. 1 is the schematic diagram of the section structure of the utility model embodiment；
Fig. 2 is the portion the C enlarged diagram of Fig. 1；
Fig. 3 is the side schematic view of the utility model embodiment.
Specific embodiment
As shown in Figure 1-Figure 3, a kind of explosion-proof digital gas mass flow meter, including meter body 1, meter body 1
It is equipped with air inlet 11 and gas outlet 12, the measuring pressure passage for air inlet 11 and gas outlet 12 to be connected is equipped in meter body 1,
Measuring pressure passage includes that the first measuring pressure passage 131, the second measuring pressure passage 132 and third set gradually along gas flow direction surveys pressure
Channel 133, the first measuring pressure passage 131 and third measuring pressure passage 133 are at cylindric setting, the internal diameter of the first measuring pressure passage 131
Greater than the internal diameter of third measuring pressure passage 133, the second measuring pressure passage 132 is at coniform setting, the first measuring pressure passage 131 and air inlet
11 connections, meter body 1 are equipped with first pressure sensor 21 at corresponding first measuring pressure passage 131, and meter body 1 is corresponding the
Second pressure sensor 22 is equipped at two measuring pressure passages 132, meter body 1 is equipped with third at corresponding third measuring pressure passage 133
Pressure sensor 23, air inlet 11 and gas outlet 12 are arranged on the same side of meter body 1, and meter body 1, which is equipped with, to be used
In the deceleration channel of conducting third measuring pressure passage 133 and gas outlet 12, deceleration channel includes storage circulation road 14, air storing cavity 15 and outer
Channel 16 is arranged, storage circulation road 14 is at horn-like setting, and the osculum for storing up circulation road 14 is connect with third measuring pressure passage 133, Chu Liutong
The big mouth in road 14 is connect with air storing cavity 15, and outlet channel 16 is connect with gas outlet, and first partition 17 is equipped in meter body 1, is surveyed
Pressure passageway, storage circulation road 4 and air storing cavity 15 are located at the upside of the first isolation board 17, and outlet channel 16 is located at the first isolation board 17
Downside, the first isolation board 17 are equipped with the flow channels 171 for being connected to air storing cavity 15 Yu outlet channel 16, and gas can pass through
Circulation road 171 flows into outlet channel 16, forms U-shaped reflux, plays the deceleration to gas, then flows out from gas outlet 12.
In the present embodiment, meter body 1 at outlet channel 16 be equipped with second partition 18, outlet channel 16 by second every
Plate 18 is divided into flat zone 161 and buffer area 162, and flat zone 161 is connected to air storing cavity 15, and buffer area 162 is connected to gas outlet 12,
Second partition 18 is equipped with the first through hole 181 for flat zone 161 and buffer area 162 to be connected.Flat zone 161 and buffer area
162 constitute straight outlet channel 16, and certain outlet channel 16 can also camber or irregular shape setting.
In the present embodiment, third partition 19 is additionally provided in meter body 1, measuring pressure passage is located under third partition 19
Side, third partition 19 are equipped with the first mounting plate 3 for the installation of each pressure sensor, and third partition 19 is equipped with and the first peace
The mounting groove 191 of 3 shape adaptation of loading board, third partition 19 are equipped at corresponding first pressure sensor 21 and sense for first pressure
The pressure test head of device 21 protrudes into the second through-hole 192 of the first measuring pressure passage 131, and third partition 19 is in corresponding second pressure sensing
The third through-hole 193 that the second measuring pressure passage 132 is protruded into for the pressure test head of second pressure sensor 22, third are equipped at device 22
Partition 19 protrudes into third equipped with the pressure test head for third pressure sensor 23 at corresponding third pressure sensor 23 and surveys pressure
The underrun sealing ring of the fourth hole 194 in channel 133, the first mounting plate 3 and mounting groove 191, which seals, to be cooperated.
In the present embodiment, meter body 1 is fixedly installed circuit board 4 on third partition 19, and circuit board 4 is respectively and respectively
A pressure sensor connects, and is also equipped with temperature sensor 5 on third partition 19, and temperature sensor 5 is connect with circuit board 4, temperature
The detector of degree sensor 5 is arranged in third partition 19 and protrudes into air storing cavity 15.
In the present embodiment, temperature sensor 5 is mounted on third partition 19 by the second mounting plate 6, the second mounting plate 6
It is fixed on third partition 19 by epoxy resin AB glue 7, the first mounting plate 3 is fixed on mounting groove by epoxy resin AB glue 7
On 191, third partition 19 is equipped with the stepped hole 195 worn for temperature sensor 5, is equipped with positioning sleeve 81 at stepped hole 195,
Temperature sensor 5 is arranged in positioning sleeve 81, and the upper surface of positioning sleeve 81 and the second mounting plate 6 are inconsistent, the lower end of positioning sleeve 81
Sealing ring 82 is folded between face and the end face of stepped hole 195.
In the present embodiment, waterproof connector 91 is additionally provided in meter body 1, waterproof connector 91 is matched with the sealing of meter body 1
It closes, cable 92 is equipped on waterproof connector 91, cable 92 and the sealing of waterproof connector 91 cooperate, and cable 92 is connect with circuit board 4.
Above embodiments, only one kind of the utility model preferably specific embodiment, those skilled in the art are in this reality
It is included in the protection scope of the utility model with the usual variations and alternatives carried out in new technique aspects.
Claims (7)
1. a kind of explosion-proof digital gas mass flow meter, including meter body, the meter body be equipped with air inlet and
Gas outlet, the interior measuring pressure passage being equipped with for air inlet and air outlet to be connected of the meter body, the measuring pressure passage includes edge
The first measuring pressure passage, the second measuring pressure passage and the third measuring pressure passage that gas flow direction is set gradually, the first measuring pressure passage
Internal diameter is greater than the internal diameter of third measuring pressure passage, and the first measuring pressure passage is connect with air inlet, it is characterised in that: the meter body exists
First pressure sensor is equipped at corresponding first measuring pressure passage, the meter body is equipped with second at corresponding second measuring pressure passage
Pressure sensor, the meter body are equipped with third pressure sensor at corresponding third measuring pressure passage, the air inlet and go out
Port is arranged on the same side of meter body, and meter body is equipped with for subtracting for third measuring pressure passage and gas outlet to be connected
Fast channel.
2. the explosion-proof digital gas mass flow meter of one kind according to claim 1, it is characterised in that: described slow down is led to
Road includes that storage circulation road, air storing cavity and outlet channel, the storage circulation road store up the osculum and third of circulation road at horn-like setting
Measuring pressure passage connection, the big mouth for storing up circulation road are connect with air storing cavity, and outlet channel is for being connected to air storing cavity and gas outlet, the stream
First partition is equipped in meter body, measuring pressure passage, storage circulation road and air storing cavity are located at the upside of the first isolation board, outlet channel position
In the downside of the first isolation board, the first isolation board is equipped with the flow channels for being connected to air storing cavity Yu outlet channel.
3. the explosion-proof digital gas mass flow meter of one kind according to claim 2, it is characterised in that: the flowmeter
Body is equipped with second partition at outlet channel, and the outlet channel is divided into flat zone and buffer area by second partition, flat zone with
Air storing cavity connection, buffer area are connected to gas outlet, and second partition is equipped with the first through hole for flat zone and buffer area to be connected.
4. the explosion-proof digital gas mass flow meter of one kind according to claim 2, it is characterised in that: the flowmeter
It is additionally provided with third partition in vivo, the measuring pressure passage is located at the downside of third partition, and third partition is equipped with to be passed for each pressure
First mounting plate of sensor installation, third partition are equipped with the mounting groove with the first mounting plate shape adaptation, and third partition is right
The second through-hole for being equipped at first pressure sensor and protruding into the first measuring pressure passage for the pressure test head of first pressure sensor is answered,
It is logical that third partition protrudes into the second survey pressure equipped with the pressure test head for second pressure sensor at corresponding second pressure sensor
The third through-hole in road, third partition are stretched at corresponding third pressure sensor equipped with the pressure test head for third pressure sensor
Enter the fourth hole of third measuring pressure passage, the sealing bottom surface cooperation of the first mounting plate and mounting groove.
5. the explosion-proof digital gas mass flow meter of one kind according to claim 4, it is characterised in that: the flowmeter
Body is fixedly installed circuit board on third partition, and circuit board is connect with each pressure sensor respectively, on the third partition
It is also equipped with temperature sensor, temperature sensor is connect with circuit board, and the detector of temperature sensor is arranged in third partition simultaneously
And protrude into air storing cavity.
6. the explosion-proof digital gas mass flow meter of one kind according to claim 5, it is characterised in that: the temperature passes
Sensor is mounted on third partition by the second mounting plate, and the second mounting plate is fixed on third partition by epoxy resin AB glue
On, the first mounting plate is fixed on mounting groove by epoxy resin AB glue, and the third partition is equipped with and wears for temperature sensor
If stepped hole, positioning sleeve is installed, temperature sensor is arranged in positioning sleeve, the upper surface of positioning sleeve and the second peace at stepped hole
Loading board is inconsistent, is folded with sealing ring between the lower end surface of positioning sleeve and the end face of stepped hole.
7. the explosion-proof digital gas mass flow meter of one kind according to claim 5 or 6, it is characterised in that: the stream
Be additionally provided with waterproof connector on meter body, waterproof connector and meter body sealing cooperate, be equipped with cable on waterproof connector, cable with
Circuit board connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822129224.9U CN209131763U (en) | 2018-12-18 | 2018-12-18 | A kind of explosion-proof digital gas mass flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822129224.9U CN209131763U (en) | 2018-12-18 | 2018-12-18 | A kind of explosion-proof digital gas mass flow meter |
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| Publication Number | Publication Date |
|---|---|
| CN209131763U true CN209131763U (en) | 2019-07-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201822129224.9U Active CN209131763U (en) | 2018-12-18 | 2018-12-18 | A kind of explosion-proof digital gas mass flow meter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112254775A (en) * | 2020-10-22 | 2021-01-22 | 山东朗晖石油化学股份有限公司 | Method for monitoring gas-liquid two phases of mass flowmeter |
-
2018
- 2018-12-18 CN CN201822129224.9U patent/CN209131763U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112254775A (en) * | 2020-10-22 | 2021-01-22 | 山东朗晖石油化学股份有限公司 | Method for monitoring gas-liquid two phases of mass flowmeter |
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