CN111750936A - Differential pressure flowmeter metering device - Google Patents
Differential pressure flowmeter metering device Download PDFInfo
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- CN111750936A CN111750936A CN202010768589.5A CN202010768589A CN111750936A CN 111750936 A CN111750936 A CN 111750936A CN 202010768589 A CN202010768589 A CN 202010768589A CN 111750936 A CN111750936 A CN 111750936A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/02—Compensating or correcting for variations in pressure, density or temperature
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/18—Supports or connecting means for meters
- G01F15/185—Connecting means, e.g. bypass conduits
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Abstract
The invention discloses a differential pressure flowmeter measuring device which comprises a differential pressure flowmeter, wherein a high-pressure sampling hole and a low-pressure sampling hole are formed at the first end of the differential pressure flowmeter, the second end of the differential pressure flowmeter is connected with a pressure taking terminal, and the pressure taking terminal is connected with a flow transmitter. The application provides a differential pressure flow metering device, simple structure is reasonable, uses the pipeline pressure to decrease for a short time. The online installation and maintenance under the condition of no production stop are completely realized. The device can be used for industrial pipeline flow measurement, avoids random discharge of existing industrial energy, and realizes fine energy management. The flow metering device can be installed and used in the domestic existing flow metering device, and can realize online installation without production stop and later maintenance. The equipment installation and maintenance cost is greatly reduced, and the integrated installation can be realized. The installation holes of redundant accessories such as temperature compensation installation, pressure compensation installation and the like do not need to be formed in the pipeline, leakage sources caused by the holes are reduced, and safety is enhanced.
Description
Technical Field
The invention relates to the technical field of industrial flow detection equipment, in particular to a temperature and pressure compensation integrated differential pressure flow metering device which has an anti-blocking function and can be installed and maintained on line.
Background
A flow meter is a meter that indicates the measured flow rate and/or the total amount of fluid in a selected time interval. Simply a meter for measuring the flow of fluid in a pipe or open channel. The flow meters are classified into differential pressure type flow meters, rotor flow meters, throttle type flow meters, slit flow meters, volumetric flow meters, electromagnetic flow meters, ultrasonic flow meters, and the like. Classifying according to media: liquid flow meters and gas flow meters. The flow measurement is one of the components of the measurement science and technology, and has close relation with national economy, national defense construction and scientific research. The work is well done, the flowmeter has important effects on ensuring the product quality, improving the production efficiency and promoting the development of scientific technology, and particularly has more obvious status and effect in national economy in the current times that the energy crisis and the industrial production automation degree are higher and higher.
The flowmeter for measuring the flow of the industrial pipeline in the prior art has a plurality of defects, for example, industrial energy is randomly discharged, the on-line non-stop installation and the later maintenance cannot be realized in the domestic existing flow metering equipment, the leakage source is increased by opening the installation holes of redundant accessories on the pipeline, such as temperature compensation installation, pressure compensation installation and the like, and the safety is reduced.
Disclosure of Invention
The invention provides a differential pressure flow metering device. The device can greatly reduce the installation and maintenance cost of the device, can realize integrated non-stop online installation, and does not need to open installation holes of redundant accessories on the pipeline.
The invention provides the following scheme:
a differential pressure flow metering device comprising:
the pressure measuring device comprises a differential pressure flowmeter, a pressure measuring terminal and a flow transmitter, wherein a high-pressure sampling hole and a low-pressure sampling hole are formed at a first end of the differential pressure flowmeter, and the second end of the differential pressure flowmeter is connected with the pressure measuring terminal;
the temperature compensation component and the pressure compensation component are respectively connected with the position, close to the second end, of the differential pressure flowmeter and are communicated with the interior of the differential pressure flowmeter;
a tubing connection assembly for connecting to tubing to form an openable and closable sampling channel;
the sealing assembly is connected with the pipeline connecting assembly, and a cavity structure penetrating through two ends of the sealing assembly is formed on the inner side of the sealing assembly;
when the differential pressure flowmeter is in a first state, the pipeline connecting assembly is used for opening the sampling channel so that a first end of the differential pressure flowmeter sequentially penetrates through the cavity structure and the sampling channel to extend into the interior of a pipeline, and the sealing assembly is used for sealing a gap between the cavity structure and the differential pressure flowmeter; when the differential pressure flowmeter is in the second state, the pipeline connecting assembly is used for closing the sampling channel.
Preferably: the pressure measuring terminal comprises three valve groups, and the flow transmitter is connected with the pressure measuring terminal through the three valve groups.
Preferably: and the pressure taking terminal is provided with two purging connectors which are respectively communicated with the high-pressure sampling channel and the low-pressure sampling channel of the differential pressure flowmeter.
Preferably: the pipeline connecting assembly is connected with the sealing assembly in a flange connection mode.
Preferably: the pipe coupling assembly includes a base and a process valve; one end of the base is connected with a pipeline in a welding mode, and the other end of the base is connected with the process valve in a flange connection mode; the process valve is formed with an upper flange for enabling connection with a pressure tapper or with the seal assembly.
Preferably: the sealing assembly comprises a fixed part, a movable part and a sealing ring with a V-shaped cross section, wherein the sealing ring is positioned between the fixed part and the movable part; the fixed part is connected with the movable part through a plurality of bolts uniformly arranged along the circumferential direction of the movable part, and the bolts are used for adjusting the distance between the fixed part and the movable part in the axial direction so as to adjust the pressure of the sealing ring; when the differential pressure flowmeter is in a first state, the distance between the fixed part and the movable part in the axial direction is minimum, so that the sealing ring is pressed into the space between the cavity structure and the differential pressure flowmeter to realize sealing.
Preferably: the sealing ring is a graphite sealing ring.
Preferably: also included is a drive assembly for effecting switching of the differential pressure flow meter between a first state and a second state.
Preferably: the driving assembly comprises two driving screw rods, and the axial directions of the two driving screw rods are parallel to the axis of the differential pressure flowmeter; one end of each of the two driving screws is connected with a driving fixed disc, and the driving fixed disc is fixedly connected with the differential pressure flowmeter; and the other ends of the two driving screws are respectively connected with two threaded holes formed by the pipeline connecting component or the sealing component in a one-to-one correspondence manner.
Preferably: the diameter of the high-pressure sampling hole is 18-22 mm, and the diameter of the low-pressure sampling hole is 13-17 mm.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
according to the invention, a differential pressure flow meter can be realized, and in an implementation mode, the device can comprise a differential pressure flow meter, wherein a high-pressure sampling hole and a low-pressure sampling hole are formed at the first end of the differential pressure flow meter, the second end of the differential pressure flow meter is connected with a pressure taking terminal, and the pressure taking terminal is connected with a flow transmitter; the temperature compensation component and the pressure compensation component are respectively connected with the position, close to the second end, of the differential pressure flowmeter and are communicated with the interior of the differential pressure flowmeter; a tubing connection assembly for connecting to tubing to form an openable and closable sampling channel; the sealing assembly is connected with the pipeline connecting assembly, and a cavity structure penetrating through two ends of the sealing assembly is formed on the inner side of the sealing assembly; when the differential pressure flowmeter is in a first state, the pipeline connecting assembly is used for opening the sampling channel so that a first end of the differential pressure flowmeter sequentially penetrates through the cavity structure and the sampling channel to extend into the interior of a pipeline, and the sealing assembly is used for sealing a gap between the cavity structure and the differential pressure flowmeter; when the differential pressure flowmeter is in the second state, the pipeline connecting assembly is used for closing the sampling channel. The application provides a differential pressure flow metering device, simple structure is reasonable, uses the pipeline pressure to decrease for a short time. The online installation and maintenance under the condition of no production stop are completely realized. The device can be used for industrial pipeline flow measurement, avoids random discharge of existing industrial energy, and realizes fine energy management. The flow metering device can be installed and used in the domestic existing flow metering device, and can realize online installation without production stop and later maintenance. The equipment installation and maintenance cost is greatly reduced, and the integrated installation can be realized. The installation holes of redundant accessories such as temperature compensation installation, pressure compensation installation and the like do not need to be formed in the pipeline, leakage sources caused by the holes are reduced, and safety is enhanced.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of a differential pressure flow metering device in a first state according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a differential pressure flow metering device in a second state according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a sealing assembly provided in an embodiment of the present invention.
In the figure: the pressure measuring device comprises a differential pressure flowmeter 1, a high-pressure sampling hole 101, a low-pressure sampling hole 102, a pressure sampling terminal 2, a flow transmitter 3, a temperature compensation assembly 4, a pressure compensation assembly 5, a pipeline connecting assembly 6, a base 601, a process valve 602, an upper flange 6021, a sealing assembly 7, a fixing part 701, a movable part 702, a sealing ring 703, a bolt 704, a purging connecting port 8, a driving screw 9, a driving fixing disc 10 and a pipeline 11.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
Examples
Referring to fig. 1, 2, and 3, a differential pressure flowmeter measuring device according to an embodiment of the present invention is shown in fig. 1, 2, and 3, and includes a differential pressure flowmeter 1, a high pressure sampling hole 101 and a low pressure sampling hole 102 are formed at a first end of the differential pressure flowmeter 1, a pressure sampling terminal 2 is connected to a second end of the differential pressure flowmeter 1, and the pressure sampling terminal 2 is connected to a flow transmitter 3; in order to facilitate the connection of the flow loosener, the pressure taking terminal comprises three valve groups, and the flow transmitter 3 is connected with the pressure taking terminal 2 through the three valve groups. But flowmeter upper end direct mount differential pressure transmitter links through three valves and need not to lead to the pipe at the adapted, and reducible installation maintenance duration also can not lead to the measurement accident because of the difference in temperature in summer and winter at the pressure pipe condensation drop, realizes complete integration.
The application provides a differential pressure flowmeter has good stifled function, and is concrete, it is formed with two connectors 8, two to get to press terminal 2 sweep connector 8 respectively with differential pressure flowmeter 1's high pressure sample access and low pressure sample access are to switching on. The diameter of the high-pressure sampling hole 101 is 18-22 mm, and the diameter of the low-pressure sampling hole 102 is 13-17 mm. Further, the diameter of high pressure thief hole is 20 millimeters, the diameter of low pressure thief hole is 15 millimeters. The application provides a differential pressure flowmeter has increased two conveniently and has prevented stifled functions, enlarges the diameter of high pressure thief hole and low pressure thief hole on the one hand, and traditional minor diameter thief hole has the effectual stifled function of preventing relatively, can realize the flow value of accuracy at the corresponding calculation procedure of cooperation. On the other hand, two purging connecting ports are formed at the pressure taking terminal, and the positive end and the negative end of the anti-blocking differential pressure sensor can be subjected to back purging through nitrogen in a complex process environment, so that zero blocking of the flowmeter is completely realized. The normal use of the flowmeter is guaranteed. When the first end of the differential pressure flowmeter is used, the first end does not need to be inserted to the bottom of a pipeline, and only needs to be inserted to the axis position of the pipeline.
The temperature compensation assembly 4 and the pressure compensation assembly 5 are respectively connected with the position, close to the second end, of the differential pressure flowmeter 1, and the temperature compensation assembly 4 and the pressure compensation assembly 5 are both communicated with the inside of the differential pressure flowmeter 1; the application provides a temperature compensation subassembly and pressure compensation subassembly realize installing with differential pressure flowmeter integration, need not at the trompil on the pipeline, can practice thrift installation time and reduce because the source of revealing that the trompil brought realizes online installation completely.
A tubing connection assembly 6, said tubing connection assembly 6 for connection to a tubing 11 to form an openable and closable sampling passage; the pipe connection assembly 6 comprises a base 601 and a process valve 602; one end of the base 601 is connected with the pipeline 11 in a welding mode, and the other end of the base 11 is connected with the process valve 602 in a flange connection mode; the process valve 602 is formed with an upper flange 6021 that is used to effect attachment to a pressure tap or to the seal assembly 7. The base 601 is used to connect the process valve 602 at the upper end of the base without damaging the pipe and the outer wall of the pipe by welding. The upper flange may be linked to a pressure tap or may be connected to a seal assembly. When the pipeline connecting assembly is installed, the base is firstly placed at the installation position on the determined pipeline, then the base is connected with the pipeline by adopting a welding process, and the process valve is connected with the base in a flange connection mode. And then connecting the pressure hole digger with the process valve, opening the process valve through the pressure hole digger, and making the drilling tool of the pressure hole digger be higher than the valve core opening and closing valve of the valve in a hydraulic mode after the process valve is opened. No air source is leaked in the process, and the pressurized hole digger can be detached after the process valve is closed. By adopting the method, the online installation of the device provided by the application can be completed without stopping the operation of the pipeline.
The sealing assembly 7 is connected with the pipeline connecting assembly 6, and a cavity structure penetrating through two ends of the sealing assembly 7 is formed on the inner side of the sealing assembly 7; in order to guarantee to obtain better sealed effect after pipeline coupling assembling and the seal assembly chain are connected, pipeline coupling assembling with seal assembly adopts the flange joint mode to link to each other. Specifically, the seal assembly 7 includes a fixed portion 701, a movable portion 702, and a seal ring 703 having a V-shaped cross section and located between the fixed portion 701 and the movable portion 702; the fixed part 701 is connected with the movable part 702 through a plurality of bolts 704 uniformly arranged along the circumferential direction of the movable part 702, and the bolts are used for adjusting the distance between the fixed part and the movable part in the axial direction so as to adjust the pressure of the sealing ring; when the differential pressure flowmeter is in a first state, the distance between the fixed part and the movable part in the axial direction is minimum, so that the sealing ring is pressed into the space between the cavity structure and the differential pressure flowmeter to realize sealing. The seal ring may be a graphite seal ring. The lower end of the sealing component is connected and sealed with the upper end of the process valve through a method, and the upper end of the sealing component is fixedly sealed with the differential pressure flowmeter after the insertion depth and direction are adjusted through a graphite sealing principle and four groups of bolts.
When the differential pressure flowmeter 1 is in a first state, the pipeline connecting assembly 6 is used for opening the sampling channel so that a first end of the differential pressure flowmeter sequentially penetrates through the cavity structure and the sampling channel to extend to the interior of a pipeline, and the sealing assembly 7 is used for sealing a gap between the cavity structure and the differential pressure flowmeter; when the differential pressure flowmeter 1 is in the second state, the pipeline connecting assembly is used for closing the sampling channel.
It should be noted that the first state provided in the present application refers to an operating state of the differential pressure flow meter, the second state refers to a state in which the differential pressure flow meter is stopped, and the second state may be a state in which the differential pressure flow meter is taken out from the pipeline when maintenance is required. In order to facilitate the switching of the differential pressure flowmeter between the first state and the second state to save labor, the differential pressure flowmeter further comprises a driving assembly, and the driving assembly is used for realizing the switching of the differential pressure flowmeter between the first state and the second state. Specifically, the driving assembly comprises two driving screws 8, and the axial directions of the two driving screws 9 are parallel to the axis of the differential pressure flowmeter 1; one end of each of the two driving screws 9 is connected with a driving fixed disk 10, and the driving fixed disk 10 is fixedly connected with the differential pressure flowmeter 1; and the other ends of the two driving screws are respectively connected with two threaded holes formed by the pipeline connecting component or the sealing component in a one-to-one correspondence manner. As shown in fig. 1, two screw holes may be formed on the fixing portion of the sealing member.
In a word, the differential pressure flow metering device that this application provided, simple structure is reasonable, uses the pipeline pressure to decrease for a short time. The online installation and maintenance under the condition of no production stop are completely realized. The device can be used for industrial pipeline flow measurement, avoids random discharge of existing industrial energy, and realizes fine energy management. The flow metering device can be installed and used in the domestic existing flow metering device, and can realize online installation without production stop and later maintenance. The equipment installation and maintenance cost is greatly reduced, and the integrated installation can be realized. The installation holes of redundant accessories such as temperature compensation installation, pressure compensation installation and the like do not need to be formed in the pipeline, leakage sources caused by the holes are reduced, and safety is enhanced.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. A differential pressure flow metering device, comprising:
the pressure measuring device comprises a differential pressure flowmeter, a pressure measuring terminal and a flow transmitter, wherein a high-pressure sampling hole and a low-pressure sampling hole are formed at a first end of the differential pressure flowmeter, and the second end of the differential pressure flowmeter is connected with the pressure measuring terminal;
the temperature compensation component and the pressure compensation component are respectively connected with the position, close to the second end, of the differential pressure flowmeter and are communicated with the interior of the differential pressure flowmeter;
a tubing connection assembly for connecting to tubing to form an openable and closable sampling channel;
the sealing assembly is connected with the pipeline connecting assembly, and a cavity structure penetrating through two ends of the sealing assembly is formed on the inner side of the sealing assembly;
when the differential pressure flowmeter is in a first state, the pipeline connecting assembly is used for opening the sampling channel so that a first end of the differential pressure flowmeter sequentially penetrates through the cavity structure and the sampling channel to extend into the interior of a pipeline, and the sealing assembly is used for sealing a gap between the cavity structure and the differential pressure flowmeter; when the differential pressure flowmeter is in the second state, the pipeline connecting assembly is used for closing the sampling channel.
2. The differential pressure flow metering device of claim 1, wherein the pressure take-off terminal comprises three valve blocks, and the flow transmitter is coupled to the pressure take-off terminal through the three valve blocks.
3. The differential pressure flow rate measuring device according to claim 2, wherein the pressure measurement terminal is formed with two purge connection ports that are respectively communicated with a high-pressure sampling passage and a low-pressure sampling passage of the differential pressure flow meter.
4. The differential pressure flow metering device of claim 1, wherein the conduit coupling assembly is flanged to the seal assembly.
5. The differential pressure flow metering device of claim 4, wherein the conduit coupling assembly comprises a base and a process valve; one end of the base is connected with a pipeline in a welding mode, and the other end of the base is connected with the process valve in a flange connection mode; the process valve is formed with an upper flange for enabling connection with a pressure tapper or with the seal assembly.
6. The differential pressure flow metering device of claim 4, wherein the seal assembly comprises a fixed portion, a movable portion, and a seal ring having a V-shaped cross-section between the fixed portion and the movable portion; the fixed part is connected with the movable part through a plurality of bolts uniformly arranged along the circumferential direction of the movable part, and the bolts are used for adjusting the distance between the fixed part and the movable part in the axial direction so as to adjust the pressure of the sealing ring; when the differential pressure flowmeter is in a first state, the distance between the fixed part and the movable part in the axial direction is minimum, so that the sealing ring is pressed into the space between the cavity structure and the differential pressure flowmeter to realize sealing.
7. The differential pressure flow metering device of claim 6, wherein the seal ring is a graphite seal ring.
8. The differential pressure flow metering device of claim 1, further comprising a drive assembly for effecting switching of the differential pressure flow meter between a first state and a second state.
9. The differential pressure flow metering device of claim 8, wherein the drive assembly comprises two drive screws, the axial directions of the two drive screws being parallel to the axis of the differential pressure flow meter; one end of each of the two driving screws is connected with a driving fixed disc, and the driving fixed disc is fixedly connected with the differential pressure flowmeter; and the other ends of the two driving screws are respectively connected with two threaded holes formed by the pipeline connecting component or the sealing component in a one-to-one correspondence manner.
10. The differential pressure flow metering device of any one of claims 1 to 9, wherein the diameter of the high pressure sampling hole is 18-22 mm and the diameter of the low pressure sampling hole is 13-17 mm.
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| CN202010768589.5A CN111750936A (en) | 2020-08-03 | 2020-08-03 | Differential pressure flowmeter metering device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112525273A (en) * | 2020-10-23 | 2021-03-19 | 江苏淮海自控设备有限公司 | Novel large-caliber high-precision flow sensor |
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| CN206891496U (en) * | 2017-06-09 | 2018-01-16 | 淮安赛希尔自动化仪表有限公司 | A kind of Li Tuoba flowmeter structures with single pole driving |
| CN210108433U (en) * | 2019-05-23 | 2020-02-21 | 天津市易艾德科技有限公司 | Differential pressure type flowmeter of adjustable casting and fishing injector |
| CN210321845U (en) * | 2019-10-16 | 2020-04-14 | 张家港泽源机械制造有限公司 | Segmental orifice plate differential pressure flowmeter |
| CN110987098A (en) * | 2019-11-25 | 2020-04-10 | 威海容信测控技术有限公司 | Plug-in type anti-blocking wedge-shaped flowmeter and non-stop mounting and dismounting method thereof |
| CN212275000U (en) * | 2020-08-03 | 2021-01-01 | 淮安赛希尔自动化仪表有限公司 | Differential pressure flowmeter metering device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112525273A (en) * | 2020-10-23 | 2021-03-19 | 江苏淮海自控设备有限公司 | Novel large-caliber high-precision flow sensor |
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