CN218787850U - Electronic gas meter capable of stabilizing flow field pressure - Google Patents
Electronic gas meter capable of stabilizing flow field pressure Download PDFInfo
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- CN218787850U CN218787850U CN202223492752.3U CN202223492752U CN218787850U CN 218787850 U CN218787850 U CN 218787850U CN 202223492752 U CN202223492752 U CN 202223492752U CN 218787850 U CN218787850 U CN 218787850U
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Abstract
The utility model relates to a stabilize electronic type gas table of flow field pressure. The jet nozzle is characterized in that the guide cover is annular, a guide lining is arranged on the inner ring of the guide cover, an annular space formed by the guide cover and the guide lining is a pressure stabilizing cavity, one end of the guide lining is connected with the guide cover in an adhesive mode, and a slit is arranged between the other end of the guide lining and the guide cover to form a high-speed jet opening; the pressure regulating assembly is composed of a base, a direct current speed regulating motor and an oblique flow impeller, the base is of a hollow structure, an air inlet hole array is arranged on the circumference of the lower portion of the base and communicated with the hollow structure of the base, the direct current speed regulating motor is installed on a direct current speed regulating motor fixing frame, and the oblique flow impeller is installed on an output shaft of the direct current speed regulating motor and faces downwards. The utility model discloses a pressure sensor real-time measuring's pressure differential, control direct current buncher drive the oblique flow impeller rotation, according to the change of pressure differential size, the adjustment revolves to and speed, all can compensate high, low pressure, especially to low pressure compensation, and is high-efficient, swift, can avoid the harm of tempering.
Description
Technical Field
The utility model relates to a stabilize electronic type gas table of flow field pressure.
Background
With the development of urbanization in China, natural gas as a clean energy source covers most areas. In cities and towns, a system consisting of all facilities from gate stations to users is called a gas pipe network, the laying of the pipe network is extremely complicated, and the arrangement of the upstream and the downstream is very different, so that the pressure fluctuation in the pipe network cannot be eliminated all the time. Gas meters for gas network terminals have also been developed from the first mechanical positive displacement diaphragm gas meter to electronic ultrasonic gas meters and thermal gas meters. The electronic gas meter has a simpler structure than a diaphragm gas meter, and no moving parts exist in the meter, so that the electronic gas meter has better metering precision and long-term precision retentivity, and is more and more widely applied to the market.
However, the traditional diaphragm gas meter adopts a positive displacement metering principle, different rotary volumes are designed according to the flow (the larger the flow is, the larger the rotary volume is), a metering cavity formed by the rubber membrane and the metering chamber is changed by the rubber membrane elastomer, the diaphragm gas meter can play a role of a gas storage chamber, pressure fluctuation brought to a gas pipe network can be realized, and the effect of buffering pressure is realized, so that stable pressure output is provided for a tail-end gas appliance, and the damage and the secondary disaster caused by the tail-end gas appliance are avoided. The electronic gas meter is used as a non-direct measuring meter, and the thermal gas meter and the ultrasonic gas meter which measure the speed ultrasonically cannot solve the pressure fluctuation brought by the pipe network but directly transmit the pressure fluctuation to a downstream appliance, so that the hidden danger is large.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the prior art, the utility model aims to provide a technical scheme of the electronic type gas table of stable flow field pressure.
The electronic gas meter capable of stabilizing the flow field pressure comprises a shell, a gas inlet, a gas outlet, a metering module and a gas outlet pipe, and is characterized in that a pressure stabilizing assembly is arranged in the shell and consists of a flow guide assembly and a pressure regulating assembly; the flow guide assembly comprises a flow guide cover and a flow guide lining, the flow guide cover is annular, the flow guide lining is arranged on the inner ring of the flow guide cover, an annular space formed by the flow guide cover and the flow guide lining is a pressure stabilizing cavity, one end of the flow guide lining is in adhesive connection with the flow guide cover, and a slit is arranged between the other end of the flow guide lining and the flow guide cover to form a high-speed jet orifice; the pressure regulating assembly comprises a base, a direct current speed regulating motor and an oblique flow impeller, wherein the base is of a hollow structure, an air inlet hole array is arranged on the circumference of the lower part of the base and communicated with the hollow structure of the base, a direct current speed regulating motor fixing frame is arranged at the upper end of the base, the direct current speed regulating motor is arranged on the direct current speed regulating motor fixing frame, an output shaft of the direct current speed regulating motor faces downwards and is provided with the oblique flow impeller, and the oblique flow impeller is positioned in the hollow structure of the base; the upper end of the base is connected with a flow guide cover, and the hollow structure of the base is communicated with the pressure stabilizing cavity; one end of the diversion cover bonded with the diversion liner is clamped on the metering module.
The electronic gas meter capable of stabilizing the flow field pressure is characterized in that the diameter of the oblique flow impeller is gradually reduced from top to bottom.
The electronic gas meter capable of stabilizing the flow field pressure is characterized in that a fixing stud is arranged on a shell below a base, and the base is installed on the fixing stud through the fixing screw.
The electronic gas meter capable of stabilizing the flow field pressure is characterized in that the metering module is installed on the shell through a module fixing frame.
The electronic gas meter capable of stabilizing the flow field pressure is characterized in that the metering module is connected with one end of the gas outlet pipe through a clamp spring, and the other end of the gas outlet pipe is installed on the shell through a screw and communicated with the gas outlet.
The electronic gas meter capable of stabilizing the flow field pressure is characterized in that a first pressure sensor is arranged on the metering module.
The electronic gas meter capable of stabilizing the flow field pressure is characterized in that a second pressure sensor is arranged on the module fixing frame.
The electronic gas meter capable of stabilizing the flow field pressure is characterized in that the cross section of the flow guide lining is a curved surface.
Compared with the prior art, the utility model has the advantages of it is following:
1) The utility model utilizes the pressure stabilizing component built in the meter to compensate the pressure fluctuation brought by the pressure pipe network, ensures the constant pressure (stable flow field) of the gas meter and the downstream appliances, and can not be damaged or tempered by sudden pressure change;
2) The utility model discloses a steady voltage subassembly, through pressure sensor real-time measuring's pressure differential, control direct current buncher drives the oblique flow impeller rotation, according to the change of pressure differential size, the adjustment revolves to and speed, all can compensate high, low pressure, especially to low pressure compensation, and is high-efficient, swift, can avoid the harm emergence of tempering.
Drawings
Fig. 1 is a first schematic structural diagram of the present invention;
FIG. 2 is a second schematic structural view of the present invention;
FIG. 3 is a schematic view of the gas flow direction during pressurization according to the present invention;
fig. 4 is a schematic view of the fixing of the air outlet pipe of the present invention;
FIG. 5 is a first schematic view of the base structure of the present invention;
FIG. 6 is a schematic view of a base structure of the present invention;
fig. 7 is a schematic structural view of the diagonal flow impeller of the present invention;
fig. 8 is a schematic structural view of the flow guide assembly of the present invention;
in the figure: 1-shell, 2-air inlet, 3-air outlet, 4-air outlet pipe, 5-metering module, 6-module fixing frame, 7-fixing stud, 8-pressure stabilizing component, 9-fixing screw, 10-base, 11-direct current speed regulating motor, 12-oblique flow impeller, 13-flow guiding lining, 14-second pressure sensor, 15-first pressure sensor, 16-screw, 17-snap spring, 18-flow guiding cover, 19-pressure stabilizing cavity, 20-high speed jet orifice, 21-buckle, 22-air inlet array and 23-direct current speed regulating motor fixing frame.
Detailed Description
The invention will be further explained with reference to the drawings in the following description:
the utility model provides a stable flow field pressure's electronic type gas table, includes casing 1, air inlet 2, gas outlet 3, measurement module 5 and outlet duct 4, sets up air inlet 2 and gas outlet 3 on the casing 1, and measurement module 5 passes through module mount 6 and installs on casing 1, and measurement module 5 passes through jump ring 17 and connects 4 one ends of outlet duct, and the 4 other ends of outlet duct are linked together with gas outlet 3 through screw 16 installation on casing 1.
The utility model discloses set up pressure stabilizing assembly 8 in the casing, the air current enters metering module 5 after passing through pressure stabilizing assembly 8, pressure stabilizing assembly 8 is made up of diversion assembly and pressure regulating assembly; the flow guide assembly comprises a flow guide cover 18 and a flow guide lining 13, the flow guide cover 18 is annular, the inner ring of the flow guide cover 18 is provided with the flow guide lining 13, in order to increase the flow guide effect, the cross section of the flow guide lining 13 can be set to be a curved surface, an annular space formed by the flow guide cover 18 and the flow guide lining 13 is a pressure stabilizing cavity 19, one end of the flow guide lining is connected with the flow guide cover in an adhesive mode, and a slit is formed between the other end of the flow guide lining and the flow guide cover to form a high-speed jet opening 20; the pressure regulating assembly consists of a base 10, a direct current speed regulating motor 11 and an oblique flow impeller 12, a fixing stud 7 is arranged on the shell 1 below the base 10, and the base is installed on the fixing stud 7 through a fixing screw 9; the base 10 is a hollow structure, the circumference of the lower part of the base 10 is provided with an air inlet array 22, the air inlet array 22 is communicated with the hollow structure of the base, the upper end of the base is provided with a direct current speed regulating motor fixing frame 23, a direct current speed regulating motor 11 is installed on the direct current speed regulating motor fixing frame 23, the direct current speed regulating motor 11 is powered by an external power supply, an output shaft of the direct current speed regulating motor 11 faces downwards and is provided with an oblique flow impeller 12, the diameter of the oblique flow impeller is gradually reduced from top to bottom, and the oblique flow impeller 12 is positioned in the hollow structure of the base; the upper end of the base 10 is connected with a flow guide cover 18, and the hollow structure of the base 10 is communicated with a pressure stabilizing cavity 19; one end of the diversion cover bonded with the diversion liner is clamped and arranged on the metering module.
Set up first pressure sensor 15 in the measurement module, through outlet duct and low reaches intercommunication for measure the low reaches pressure value, set up second pressure sensor 14 on the module mount, be used for measuring the casing internal pressure value, this second pressure sensor is adjacent with the air inlet, and is similar with the pipe network intercommunication.
When the pressure is stable, gas enters from the gas inlet 2, directly enters the metering module 5 through the diversion liner 13, is metered, passes through the gas outlet pipe 4 and the gas outlet 3, and is discharged to a gas appliance at the downstream of the meter.
During pressurization, the direct current speed regulating motor 11 drives the oblique flow impeller 12 to rotate clockwise, gas enters the pressure stabilizing cavity 19 through the air inlet hole array 22 at the bottom of the base 10, and a high-speed jet hole 20 (slit) formed by the flow guide cover 18 and the flow guide lining 13 is sprayed onto the curved surface of the flow guide lining to generate a coanda effect, so that peripheral gas is driven to enter a flow channel in an accelerated manner, and the pressurization effect is rapidly generated.
When the pressure is reduced, the direct current speed regulating motor 11 drives the oblique flow impeller 12 to rotate anticlockwise, and gas in the pressure stabilizing cavity 19 is discharged into the shell from the air inlet hole array 22 of the base 10 and collides with air flow in the shell to generate kinetic energy to reduce the pressure.
The utility model discloses a theory of operation: when the electronic gas meter works, gas enters the shell through a gas inlet of the gas meter, the first pressure sensor measures inlet pressure, the gas directly enters the metering module through the diversion liner, the second pressure sensor arranged in the metering module measures gas outlet pipe and downstream pressure value, and the measured gas is discharged out of the meter; in the process, the values of the first pressure sensor and the second pressure sensor are compared in real time, and a difference value is calculated and compared with a threshold value; when the pressure of a pipe network fluctuates and the differential pressure of two sensors exceeds the lower limit of a threshold value, a direct-current speed regulating motor starts to rotate clockwise, so that gas in a shell enters from an air inlet array at the lower part of a base, is rotated and pressurized by an oblique-flow impeller, then passes through a guide cover and a pressure stabilizing cavity of a guide liner, and is ejected from a narrow high-speed jet orifice, and because the gas is ejected out and forms a Coanda effect (Coanda) along a specially-made curved surface, negative pressure is locally generated to drive peripheral gas flow to flow in an accelerated manner, a backup effect is generated, and the pressure of the gas flowing to the downstream is ensured to be kept stable (a flow field is stabilized);
when the pressure difference of the sensor exceeds the upper limit of the threshold value, the direct current speed regulating motor rotates reversely, negative pressure is locally generated, gas is driven to enter the pressure stabilizing cavity from the air guide sleeve and the slit (high-speed jet port) of the air guide lining, and then is discharged through the air inlet hole array at the bottom of the base to collide and mix with the gas in the shell, and the pressure stability is maintained through kinetic energy loss.
The motor can be regulated according to the pressure difference value, and the corresponding pressure difference is compensated.
The utility model discloses can sense the pressure differential change in the short time to start the compensation rapidly, nevertheless consider energy consumption, only do short-term pressure stabilization function, can start according to the condition and close the valve command during the compensation, realize safe gas consumption.
The specific examples described herein are merely illustrative of the novel spirit of the use. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Although the terms electronic gas meter, gas inlet, gas outlet, pressure sensor, metering module, diagonal flow impeller, flow guiding liner, flow guiding hood, etc. are used more often herein, the possibility of using other terms is not excluded. These terms are used merely for convenience in describing and explaining the nature of the present invention and are to be construed as any additional limitation which is not in line with the spirit of the present invention.
Claims (8)
1. An electronic gas meter for stabilizing the pressure of a flow field comprises a shell, a gas inlet, a gas outlet, a metering module and a gas outlet pipe, and is characterized in that a pressure stabilizing assembly is arranged in the shell and consists of a flow guide assembly and a pressure regulating assembly; the flow guide assembly comprises a flow guide cover and a flow guide lining, the flow guide cover is annular, the inner ring of the flow guide cover is provided with the flow guide lining, an annular space formed by the flow guide cover and the flow guide lining is a pressure stabilizing cavity, one end of the flow guide lining is connected with the flow guide cover in an adhesive mode, and a slit is formed between the other end of the flow guide lining and the flow guide cover to form a high-speed jet opening; the pressure regulating assembly comprises a base, a direct current speed regulating motor and an oblique flow impeller, wherein the base is of a hollow structure, an air inlet hole array is arranged on the circumference of the lower part of the base and communicated with the hollow structure of the base, a direct current speed regulating motor fixing frame is arranged at the upper end of the base, the direct current speed regulating motor is arranged on the direct current speed regulating motor fixing frame, an output shaft of the direct current speed regulating motor faces downwards and is provided with the oblique flow impeller, and the oblique flow impeller is positioned in the hollow structure of the base; the upper end of the base is connected with a flow guide cover, and the hollow structure of the base is communicated with the pressure stabilizing cavity; one end of the diversion cover bonded with the diversion liner is clamped on the metering module.
2. The electronic gas meter for stabilizing the pressure in the flow field according to claim 1, wherein the diameter of the oblique flow impeller is gradually reduced from top to bottom.
3. The electronic gas meter with the stable flow field pressure as recited in claim 1, wherein a fixing stud is disposed on the housing below the base, and the base is mounted on the fixing stud through a fixing screw.
4. The electronic gas meter for stabilizing the pressure in the flow field according to claim 1, wherein the metering module is mounted on the housing through a module fixing frame.
5. The electronic gas meter with the stable flow field pressure as claimed in claim 1, wherein the metering module is connected with one end of the gas outlet pipe through a snap spring, and the other end of the gas outlet pipe is mounted on the housing through a screw and communicated with the gas outlet.
6. The electronic gas meter for stabilizing the pressure in the flow field according to claim 1, wherein the first pressure sensor is disposed on the metering module.
7. The electronic gas meter for stabilizing the pressure of the flow field according to claim 4, wherein a second pressure sensor is disposed on the module fixing frame.
8. The electronic gas meter for stabilizing the pressure of the flow field according to claim 1, wherein the cross section of the flow guide lining is a curved surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223492752.3U CN218787850U (en) | 2022-12-27 | 2022-12-27 | Electronic gas meter capable of stabilizing flow field pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223492752.3U CN218787850U (en) | 2022-12-27 | 2022-12-27 | Electronic gas meter capable of stabilizing flow field pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218787850U true CN218787850U (en) | 2023-04-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223492752.3U Active CN218787850U (en) | 2022-12-27 | 2022-12-27 | Electronic gas meter capable of stabilizing flow field pressure |
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| Country | Link |
|---|---|
| CN (1) | CN218787850U (en) |
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- 2022-12-27 CN CN202223492752.3U patent/CN218787850U/en active Active
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