CN210036833U - Orifice flowmeter - Google Patents
Orifice flowmeter Download PDFInfo
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- CN210036833U CN210036833U CN201920836075.1U CN201920836075U CN210036833U CN 210036833 U CN210036833 U CN 210036833U CN 201920836075 U CN201920836075 U CN 201920836075U CN 210036833 U CN210036833 U CN 210036833U
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Abstract
The utility model relates to a pore plate flowmeter, which comprises a pore plate throttling device, a valve group and a differential pressure transmitter; the orifice plate throttling device comprises an orifice plate, at least one group of pressure-taking pipelines, at least one group of liquid discharge pipes and at least one liquid accumulation device; one end of each pressure taking pipeline in the at least one group of pressure taking pipelines is connected with the pore plate, and the other end of each pressure taking pipeline is connected with the valve group; the at least one group of liquid discharge pipes are connected with the at least one group of pressure taking pipelines in a one-to-one correspondence manner so as to discharge accumulated liquid in the pressure taking pipelines; the at least one liquid accumulation device is connected with the at least one group of liquid discharge pipes so as to accumulate the liquid accumulated by the pressure taking pipeline; the differential pressure transmitter is connected with the valve group. The orifice plate flowmeter can avoid the large differential pressure value of the orifice plate flowmeter and improve the accuracy of measurement. The orifice plate flowmeter has the advantages of being reasonable in design, convenient to use and operate, stable and reliable in work, obvious in using effect and convenient to popularize and use.
Description
Technical Field
The utility model relates to a natural gas field development handles technical field, and more specifically says, relates to a orifice plate flowmeter.
Background
The standard orifice plate flowmeter is a differential pressure generating device for measuring flow, and can be matched with various differential pressure meters or differential pressure transmitters to measure the flow of liquid, steam and gas. When the fluid filling the pipeline flows through the throttling device in the pipeline, the flow beam forms local contraction at the throttling part of the throttling device, so that the flow speed is increased, the static pressure is low, and then, a pressure drop, namely a pressure difference, is generated before and after the throttling part, the pressure difference generated before and after the throttling part is larger when the flow of the medium flows, so that the orifice plate flowmeter can measure the size of the fluid flow by measuring the pressure difference.
Before the natural gas enters the external pipeline, the natural gas is dehydrated by a special device. However, a certain amount of free liquid still exists in natural gas, and when the orifice plate flowmeter in the prior art is used for measuring natural gas, liquid accumulation in pressure leading pipelines on positive and negative pressure sides often occurs. This phenomenon inevitably causes distortion in measurement of the orifice flowmeter, resulting in large fluctuation in the transmitter output of the orifice flowmeter and deviation from the actual measurement value. Taking the example that the installation height of the differential pressure transmitter of the orifice plate flowmeter is higher than that of the orifice plate flowmeter, when effusion exists in a pressure-leading pipeline at the positive pressure side, the measured differential pressure value of the orifice plate flowmeter is smaller, and the flow value calculated by the upper computer flow calculation system is smaller than the actual flow value in the pipeline; when effusion exists in the negative pressure side pressure-leading pipeline, the measured differential pressure value of the orifice plate flowmeter is larger, and the flow value calculated by the upper computer flow calculation system is larger than the actual flow value in the pipeline. The existing solution is to open the balance valve above the three valve groups, close the root valve, and then slowly open the drain valve to drain the accumulated liquid in the pressure guide pipe until the accumulated liquid is completely drained, and then put the instrument into operation again. When the water content of the natural gas is high, the orifice plate flowmeter can frequently deviate from an actual value in measurement, frequent pollution discharge operation is required, and the use is inconvenient.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a modified orifice plate flowmeter.
The utility model provides a technical scheme that its technical problem adopted is: constructing a pore plate flowmeter, a pore plate throttling device, a valve group and a differential pressure transmitter;
the orifice plate throttling device comprises an orifice plate, at least one group of pressure-taking pipelines, at least one group of liquid discharge pipes and at least one liquid accumulation device;
one end of each pressure taking pipeline in the at least one group of pressure taking pipelines is connected with the pore plate, and the other end of each pressure taking pipeline is connected with the valve group;
the at least one group of liquid discharge pipes are connected with the at least one group of pressure taking pipelines in a one-to-one correspondence manner so as to discharge accumulated liquid in the pressure taking pipelines; the at least one liquid accumulation device is connected with the at least one group of liquid discharge pipes so as to accumulate the liquid accumulated by the pressure taking pipeline;
the differential pressure transmitter is connected with the valve group.
Preferably, a liquid outlet is arranged on the liquid accumulation device;
and a liquid discharge valve is arranged in the liquid discharge direction of the liquid discharge port.
Preferably, each pressure tapping line is provided with an isolation valve.
Preferably, at least one group of pressure taking holes are formed in the pore plate; the at least one group of pressure taking pipelines are correspondingly connected with the at least one group of pressure taking holes.
Preferably, a pressure guide pipeline is arranged between each pressure taking pipeline and the valve group;
the pressure-leading pipeline, the pressure-taking pipeline and the liquid discharge pipe are connected through a tee joint.
Preferably, the pressure line forms an angle with the installation plane.
Preferably, the included angle is 30-60 degrees.
Preferably, the valve block comprises a five-valve block.
Preferably, each set of pressure tapping pipelines comprises a first pressure tapping pipeline and a second pressure tapping pipeline;
each group of the liquid discharge pipes comprises a first liquid discharge pipe communicated with the first pressure sampling pipeline and a second liquid discharge pipe communicated with the second pressure sampling pipeline;
the at least one liquid accumulating device comprises a first liquid accumulating device arranged on the first liquid discharging pipe and a second liquid accumulating device arranged on the second liquid discharging pipe.
Preferably, the differential pressure transmitter further comprises a display device connected with the differential pressure transmitter.
Implement the utility model discloses an orifice plate flowmeter has following beneficial effect: this orifice plate flowmeter, it is connected through at least a set of fluid-discharge tube and at least a set of pressure line one-to-one of being connected with orifice plate and valves to be connected it with at least one hydrops device, thereby can accumulate through the hydrops device and get pressure line outgoing hydrops, and then avoid orifice plate flowmeter differential pressure value to be big partially, improve measuring accuracy. The orifice plate flowmeter has the advantages of being reasonable in design, convenient to use and operate, stable and reliable in work, obvious in using effect and convenient to popularize and use.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is a schematic structural diagram of the orifice plate flowmeter of the present invention.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 shows a preferred embodiment of the orifice plate flow meter of the present invention. The orifice plate flowmeter can be used for measuring the natural gas flow containing free water, and can ensure that the measurement result is closer to the true value. The novel multifunctional clothes hanger has the advantages of being reasonable in design, convenient to use and operate, stable and reliable in work, obvious in using effect and convenient to popularize and use.
As shown in fig. 1, the orifice flowmeter includes an orifice throttling device 10, a valve group 20, a differential pressure transmitter 30, and a display device; the orifice plate throttling device 10 may be disposed on a natural gas pipeline, and when fluid in the pipeline flows through the orifice plate throttling device 10, the flow beam will be partially contracted in the orifice plate throttling device, so as to increase the flow velocity, reduce the static pressure thereof, and generate a pressure difference in front of and behind the orifice plate throttling device, so as to measure the magnitude of the fluid flow. The valve block 20, which is coupled to the orifice plate restriction 10, can reduce leakage during differential pressure transmission and facilitate replacement of the differential pressure transmitter 30. The differential pressure transmitter 30, which is connected to the valve set 20, can be used to convert the pressure signal output by the orifice plate throttling device 10 into a differential pressure standard signal. The display device is in communication connection with the differential pressure transmitter 30, and can receive the signal output by the differential pressure transmitter 30, convert the signal into corresponding flow information, and display the flow information.
Further, the orifice throttling device 10 comprises an orifice 11, at least one group of pressure extraction pipelines 12, at least one group of liquid discharge pipes 13 and at least one liquid accumulation device 14; the orifice plate 11 is used for fluid to flow through and pressurize the fluid. The at least one set of pressure-taking lines 12, which are connected to the orifice plate 11, can collect a differential pressure signal generated by the orifice plate 11. Each pressure line 12 of the at least one set of pressure lines 12 has one end connected to the orifice plate 11 and the other end connected to the valve set 20. The at least one group of liquid discharge pipelines 13 are connected with the at least one group of pressure sampling pipelines 12 in a one-to-one correspondence manner, and can be used for discharging accumulated liquid in the pressure sampling pipelines 12, so that the phenomenon that the differential pressure value of the orifice plate flowmeter is too large is avoided.
The orifice plate 11 is provided with at least one group of pressure taking holes; the pressure measuring holes can be one group or multiple groups of pressure measuring holes, and in the embodiment, the pressure measuring holes comprise one group of pressure measuring holes, and each group of pressure measuring holes is wrapped with a first pressure measuring hole and a second pressure measuring hole; the first pressure-taking hole is disposed in an upstream direction of the fluid, and the second pressure-taking hole is disposed in a downstream direction of the fluid. The number of the first pressure taking holes and the second pressure taking holes is matched, and each pressure taking hole can comprise one or more pressure taking holes. In the present embodiment, each of them includes one.
The at least one set of pressure lines 12, which may include one or more sets of pressure lines, are connected to the at least one set of pressure ports. In the embodiment, each pressure sampling pipeline 12 comprises a first pressure sampling pipeline 12a and a second pressure sampling pipeline 12b, one end of the first pressure sampling pipeline 12a is connected with the upstream pressure sampling hole, and one end of the second pressure sampling pipeline 12b is connected with the downstream pressure sampling hole, so that a differential pressure signal before and after the orifice plate 1 can be collected and output.
The at least one set of drain pipes 13, which may include one or more sets of drain pipes 13, in this embodiment, a set of drain pipes 13; each set of liquid discharge pipes 13 including a first liquid discharge pipe 13a, and a second liquid discharge pipe 13 b; the first liquid discharge pipe 13a is communicated with the first pressure sampling pipe 12a to discharge the accumulated liquid in the first pressure sampling pipe 12 a; the second drain pipe 13b is communicated with the second pressure sampling pipe 12 to drain the accumulated liquid in the second pressure sampling pipe 12 b.
The at least one liquid loading device 14 includes one or more liquid loading devices, and in this embodiment, it may include two liquid loading devices, specifically, it includes a first liquid loading device 14a and a second liquid loading device 14 b; the first liquid accumulation device 14a is disposed on the first liquid discharge pipe 13a, and can be used for accumulating the liquid accumulated by the first liquid discharge pipe 13 a; the second liquid accumulation device 14b is provided on the second liquid discharge pipe 13b, and may be configured to accumulate the liquid accumulated in the second liquid discharge pipe 13 b. It is understood that in other embodiments, when there is only one liquid loading device 14, the first liquid discharge pipe 13a and the second liquid discharge pipe 13b may be connected to the liquid loading device 14. In this embodiment, all be equipped with the leakage fluid dram on every hydrops device 14 to in time discharge hydrops when hydrops device 14 is full, thereby guarantee the stability of pressure differential.
In this embodiment, each pressure sampling pipeline 12 is further provided with an isolation valve 15; the isolation valves 15, which include two isolation valves 15, the number of which is adapted to the number of the pressure tapping lines 12, are provided between the pressure tapping lines 12 and the liquid discharge pipe 13.
In the present embodiment, a drain valve 16 is disposed in the drain direction of the drain port of each liquid loading device 14, so as to close the drain port. In the present embodiment, the drain valve 16 includes a first drain valve 16a and a second drain valve 16 b; the first drain valve 16a is arranged on a drain port of the first liquid loading device 14 a; the second drain valve 16b is provided at a drain port of the second liquid accumulation device 14 b.
In the present embodiment, the valve group 20 may be a five-valve group, but it should be understood that in other embodiments, it is not limited to a five-valve group, and it may also be a three-valve group or others. Which is disposed between the differential pressure transmitter 30 and the pressure tapping line 12, and which can be connected to the pressure tapping line 12 and the differential pressure transmitter 30, in particular, by disposing a pressure tapping line 40.
In the present embodiment, the pressure tapping line 40, which is disposed between each pressure tapping line 12 and the valve block 20, can tap the differential pressure signal of the pressure tapping line 12 to the differential pressure transmitter 30. In the present embodiment, the pressure leading line 40 includes a first pressure leading line 40a and a second pressure leading line 40 b; the first pressure introduction line 40a is connected to the first pressure take-off line 12a, and the second pressure introduction line 40b is connected to the second pressure take-off line 12 b. In this embodiment, each pressure-inducing pipeline may form an included angle with the mounting plane, and in this embodiment, the included angle may be 30 to 60 degrees.
In the present embodiment, the pressure leading line 40, the pressure sampling line 12, and the liquid discharge pipe 13 may be connected to each other by providing a three-way joint. The inlet end of the three-way joint is connected with the outlet end of an isolation valve 15 on the pressure tapping pipeline 12, and the outlet end in the vertical direction of the three-way joint is respectively connected to a differential pressure transmitter 30 which is used for converting a pressure signal collected from a first pressure tapping hole at the upstream and a pressure signal collected from a second pressure tapping hole at the downstream into a differential pressure standard signal through five valve groups; the outlet end in the lateral direction thereof is connected to this drain pipe 13. The tee joint may include a first tee joint and a second tee joint; the first three-way joint is used for communicating the first pressure taking pipeline 12a, the first liquid discharging pipe 13a and the first pressure leading pipeline 40 a; the second three-way joint is used for communicating the second pressure taking pipeline 12b, the second liquid discharge pipeline 13b and the second pressure leading pipeline 40 a.
In this embodiment, the display device, which may include a host and a display, the differential pressure transmitter 30, which may be connected to the host, converts the differential pressure signal outputted from the host and displays the converted signal on the display.
The utility model discloses simple structure, the installation of being convenient for. During the specific use, liquid medium in the natural gas is behind the pressure pipe line 12 of the differential pressure transmitter 30 who gets into the orifice plate flowmeter, because there is great density difference with the natural gas, liquid medium can get into hydrops device 14 through the gravity settling effect, has reduced the hydrops volume in the pressure line 40, makes differential pressure transmitter 30 numerical measurement more close actual value. When the hydrops amount is more in the hydrops device 14, inside hydrops can be got rid of in the manual flowing back of accessible, because hydrops device 14 volume obviously is greater than the internal volume of drainage pipeline 40, can reduce the flowing back frequency in the actual work.
It is to be understood that the foregoing examples merely represent preferred embodiments of the present invention, and that the description thereof is more specific and detailed, but not intended to limit the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (10)
1. An orifice flowmeter, characterized by comprising an orifice throttling device (10), a valve group (20) and a differential pressure transmitter (30);
the orifice plate throttling device (10) comprises an orifice plate (11), at least one group of pressure extraction pipelines (12), at least one group of liquid discharge pipes (13) and at least one liquid accumulation device (14);
one end of each pressure taking pipeline (12) in the at least one group of pressure taking pipelines (12) is connected with the pore plate (11), and the other end of each pressure taking pipeline is connected with the valve group (20);
the at least one group of liquid discharge pipes (13) are correspondingly connected with the at least one group of pressure taking pipelines (12) one by one so as to discharge accumulated liquid in the pressure taking pipelines (12); the at least one liquid accumulation device (14) is connected with the at least one group of liquid discharge pipes (13) to accumulate the liquid accumulated by the pressure taking pipeline (12);
the differential pressure transmitter (30) is connected with the valve group (20).
2. An orifice plate flowmeter according to claim 1 wherein the liquid accumulation device (14) is provided with a liquid drain;
and a liquid discharge valve (16) is arranged in the liquid discharge direction of the liquid discharge port.
3. An orifice flowmeter according to claim 1, wherein each of said pressure take-off lines (12) is provided with an isolation valve (15).
4. The orifice plate flowmeter according to claim 1, wherein at least one set of pressure taps is provided on the orifice plate (11); the at least one set of pressure tapping pipelines (12) is correspondingly connected with the at least one set of pressure tapping holes.
5. Orifice plate flowmeter according to claim 1, characterized in that between each pressure take-off line (12) and the valve group (20) there is a pressure lead-through line (40);
the pressure guide pipeline (40), the pressure taking pipeline (12) and the liquid discharge pipe (13) are connected through a tee joint.
6. An orifice plate flowmeter according to claim 5 wherein the pressure lead line (40) forms an angle with the mounting plane.
7. The orifice plate flowmeter of claim 6, wherein the included angle is 30-60 degrees.
8. The orifice plate flowmeter of claim 1, wherein the valve set (20) comprises a five valve set (20).
9. An orifice plate flowmeter according to claim 1, wherein each set of the pressure pick-up lines (12) comprises a first pressure pick-up line (12a) and a second pressure pick-up line (12 b);
each set of said discharge pipes (13) comprises a first discharge pipe (13a) communicating with said first pressure line (12a), and a second discharge pipe (13b) communicating with said second pressure line (12 b);
the at least one liquid accumulating device (14) comprises a first liquid accumulating device (14a) arranged on the first liquid discharge pipe (13a) and a second liquid accumulating device (14b) arranged on the second liquid discharge pipe (13 b).
10. An orifice plate flowmeter according to claim 1, further comprising a display coupled to the differential pressure transmitter (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920836075.1U CN210036833U (en) | 2019-05-31 | 2019-05-31 | Orifice flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920836075.1U CN210036833U (en) | 2019-05-31 | 2019-05-31 | Orifice flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210036833U true CN210036833U (en) | 2020-02-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920836075.1U Active CN210036833U (en) | 2019-05-31 | 2019-05-31 | Orifice flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210036833U (en) |
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2019
- 2019-05-31 CN CN201920836075.1U patent/CN210036833U/en active Active
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