A differential pressure flow metering device

Abstract

The present invention discloses a differential pressure flow metering device, which includes a differential pressure flow meter, a first end of which is formed with a high-pressure sampling hole and a low-pressure sampling hole, a second end of which is connected to a pressure terminal, and a flow transmitter. The differential pressure flow metering device provided by the present application has a simple and reasonable structure and a small pressure loss in the pipeline. It can be fully installed and maintained online without stopping production. It can be used for industrial pipeline flow metering, to prevent the existing industrial energy from being randomly discharged and placed, and to achieve fine energy management. It can be installed and used in existing domestic flow metering equipment to achieve online installation and subsequent maintenance without stopping production. The equipment installation and maintenance costs are greatly reduced, and integrated installation can be achieved. There is no need to open installation holes for redundant accessories on the pipeline, such as temperature compensation installation, pressure compensation installation, etc., which reduces the leakage source caused by the opening and enhances safety.

Description

Technical Field

[0001] The invention relates to the technical field of industrial flow detection equipment, and in particular to a temperature and pressure compensation integrated differential pressure flow metering device with an anti-blocking function and capable of online installation and maintenance. Background Art

[0002] A flow meter is an instrument that indicates the measured flow rate and / or the total amount of fluid within a selected time interval. In simple terms, it is an instrument used to measure the flow rate of fluid in a pipeline or open channel. Flow meters are divided into differential pressure flow meters, rotor flow meters, throttling flow meters, slit flow meters, volumetric flow meters, electromagnetic flow meters, ultrasonic flow meters, etc. Classified by medium: liquid flow meters and gas flow meters. Flow measurement is one of the components of metrology science and technology, and it is closely related to the national economy, national defense construction, and scientific research. Doing this work well plays an important role in ensuring product quality, improving production efficiency, and promoting the development of science and technology. Especially in today's era of energy crisis and increasing automation of industrial production, the status and role of flow meters in the national economy are more obvious.

[0003] The flow meters used in the prior art to measure the flow of industrial pipelines have many shortcomings. For example, industrial energy is discharged randomly, and online non-stop installation and subsequent maintenance cannot be achieved in existing domestic flow metering equipment. The need to open redundant installation holes on the pipeline for accessories such as temperature compensation installation and pressure compensation installation increases the source of leakage and reduces safety. Summary of the invention

[0004] The present invention provides a differential pressure flow metering device, which can greatly reduce the equipment installation and maintenance costs, can realize integrated non-stop online installation, and does not need to open additional installation holes for accessories on the pipeline.

[0005] The present invention provides the following scheme:

[0006] A differential pressure flow metering device, comprising:

[0007] A differential pressure flowmeter, wherein a high-pressure sampling hole and a low-pressure sampling hole are formed at a first end of the differential pressure flowmeter, a pressure terminal is connected to a second end of the differential pressure flowmeter, and a flow transmitter is connected to the pressure terminal;

[0008] a temperature compensation component and a pressure compensation component, wherein the temperature compensation component and the pressure compensation component are respectively connected to a position of the differential pressure flowmeter close to the second end and are both in conduction with the interior of the differential pressure flowmeter;

[0009] A pipeline connecting assembly, the pipeline connecting assembly is used to connect with the pipeline to form a sampling channel that can be opened and closed;

[0010] A sealing component, the sealing component is connected to the pipeline connecting component, and a cavity structure penetrating both ends of the sealing component is formed on the inner side of the sealing component;

[0011] Wherein, when the differential pressure flowmeter is in a first state, the pipe connecting assembly is used to open the sampling channel so that the first end of the differential pressure flowmeter sequentially passes through the cavity structure and the sampling channel to extend to the interior of the pipeline, and the sealing assembly is used to seal the gap between the cavity structure and the differential pressure flowmeter; when the differential pressure flowmeter is in a second state, the pipe connecting assembly is used to close the sampling channel.

[0012] Preferably, the pressure terminal comprises a three-valve group, and the flow transmitter is connected to the pressure terminal via the three-valve group.

[0013] Preferably, the pressure terminal is formed with two purge connection ports, and the two purge connection ports are respectively connected to the high-pressure sampling channel and the low-pressure sampling channel of the differential pressure flowmeter.

[0014] Preferably, the pipeline connection assembly is connected to the sealing assembly by a flange connection.

[0015] Preferably: the pipeline connection assembly includes a base and a process valve; one end of the base is connected to the pipeline by welding, and the other end of the base is connected to the process valve by flange connection; the process valve is formed with an upper flange, and the upper flange is used to connect to a pressurized hole opener or to the sealing assembly.

[0016] Preferably: the sealing assembly includes a fixed part, a movable part and a sealing ring with a V-shaped cross-section located between the fixed part and the movable part; the fixed part and the movable part are connected by a plurality of bolts evenly arranged along the circumference of the movable part, and the plurality of bolts are used to adjust 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 the first state, the distance between the fixed part and the movable part in the axial direction is the smallest, so as to press the sealing ring into between the cavity structure and the differential pressure flowmeter to achieve sealing.

[0017] Preferably, the sealing ring is a graphite sealing ring.

[0018] Preferably, it also includes a driving component, and the driving component is used to realize the switching of the differential pressure flowmeter between the first state and the second state.

[0019] Preferably: the driving assembly comprises two driving screws, the axial directions of the two driving screws are parallel to the axis of the differential pressure flowmeter; one end of each of the two driving screws is connected to a driving fixed disk, and the driving fixed disk is fixedly connected to the differential pressure flowmeter; the other end of each of the two driving screws is connected one-to-one with two threaded holes formed by the pipeline connection assembly or the sealing assembly.

[0020] 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.

[0021] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0022] Through the present invention, a differential pressure flow metering device can be realized. In one implementation mode, the device may include a differential pressure flow meter, wherein a high-pressure sampling hole and a low-pressure sampling hole are formed at a first end of the differential pressure flow meter, a pressure terminal is connected to a second end of the differential pressure flow meter, and a flow transmitter is connected to the pressure terminal; a temperature compensation component and a pressure compensation component, wherein the temperature compensation component and the pressure compensation component are respectively connected to a position of the differential pressure flow meter close to the second end and are both connected to the inside of the differential pressure flow meter; and a pipeline connection component, wherein the pipeline connection component is used to be connected to a pipeline so as to form A sampling channel that can be opened and closed; a sealing component, the sealing component is connected to the pipeline connection component, and a cavity structure running through both ends of the sealing component is formed on the inner side; wherein, when the differential pressure flowmeter is in the first state, the pipeline connection component is used to open the sampling channel so that the first end of the differential pressure flowmeter sequentially passes through the cavity structure and the sampling channel to extend to the inside of the pipeline, and the sealing component is used to seal the gap between the cavity structure and the differential pressure flowmeter; when the differential pressure flowmeter is in the second state, the pipeline connection component is used to close the sampling channel. The differential pressure flow metering device provided by the present application has a simple and reasonable structure and a small pressure loss when using the pipeline. It can fully realize online installation and maintenance without stopping production. It can be used for industrial pipeline flow metering, eliminate the existing industrial energy from being randomly discharged and placed, and realize fine energy management. It can be installed and used in existing domestic flow metering equipment to realize online installation and later maintenance without stopping production. It greatly reduces the cost of equipment installation and maintenance, and can realize integrated installation. There is no need to open extra installation holes for accessories on the pipeline, such as temperature compensation installation, pressure compensation installation, etc., which reduces the leakage source caused by opening holes and enhances safety.

[0023] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 is a structural schematic diagram of a differential pressure flow metering device in a first state provided by an embodiment of the present invention;

[0026] Figure 2 is a structural schematic diagram of a differential pressure flow metering device in a second state provided by an embodiment of the present invention;

[0027] Figure 3 It is a schematic diagram of the structure of a sealing assembly provided in an embodiment of the present invention.

[0028] In the figure: differential pressure flowmeter 1, high pressure sampling hole 101, low pressure sampling hole 102, pressure terminal 2, flow transmitter 3, temperature compensation component 4, pressure compensation component 5, pipeline connection component 6, base 601, process valve 602, upper flange 6021, sealing component 7, fixed part 701, movable part 702, sealing ring 703, bolt 704, purge connection port 8, drive screw 9, drive fixing plate 10, pipeline 11. DETAILED DESCRIPTION

[0029] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0030] Example

[0031] See also Figure 1 , Figure 2 , Figure 3 , is a differential pressure flow metering device provided by an embodiment of the present invention, such as Figure 1 , Figure 2 , Figure 3As shown, the device includes a differential pressure flowmeter 1, a high pressure sampling hole 101 and a low pressure sampling hole 102 are formed at the first end of the differential pressure flowmeter 1, a pressure terminal 2 is connected to the second end of the differential pressure flowmeter 1, and a flow transmitter 3 is connected to the pressure terminal 2; in order to facilitate the connection of the flow transmitter, the pressure terminal includes a three-valve group, and the flow transmitter 3 is connected to the pressure terminal 2 through the three-valve group. The differential pressure transmitter can be directly installed on the upper end of the flowmeter through the three-valve group connection without the need for a pressure pipe, which can reduce the installation and maintenance time and will not cause measurement accidents due to condensation of water droplets in the pressure pipe due to the temperature difference in summer and winter, thus achieving full integration.

[0032] The differential pressure flowmeter provided in the present application has a good anti-blocking function. Specifically, the pressure terminal 2 is formed with two purge connectors 8, and the two purge connectors 8 are respectively connected to the high-pressure sampling channel and the low-pressure sampling channel of the differential pressure flowmeter 1. 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 the high-pressure sampling hole is 20 mm, and the diameter of the low-pressure sampling hole is 15 mm. The differential pressure flowmeter provided in the present application has added anti-blocking functions in two convenient ways. On the one hand, the diameter of the high-pressure sampling hole and the low-pressure sampling hole is enlarged, and the traditional small-diameter sampling hole has an effective anti-blocking function, and an accurate flow value can be achieved in conjunction with the corresponding calculation program. On the other hand, two purge connectors are formed at the pressure terminal. In the case of a complex process environment, the positive and negative ends of the anti-blocking differential pressure sensor can be back-purged by nitrogen, so that the flowmeter can completely achieve zero blockage. Ensure the normal use of the flowmeter. When in use, the first end of the differential pressure flowmeter does not need to be inserted to the bottom of the pipeline, but only needs to be inserted to the axial center position of the pipeline.

[0033] The temperature compensation component 4 and the pressure compensation component 5 are respectively connected to the differential pressure flowmeter 1 at a position close to the second end and are both connected to the inside of the differential pressure flowmeter 1; the temperature compensation component and the pressure compensation component provided in the present application are installed in an integrated manner with the differential pressure flowmeter, and there is no need to drill holes in the pipeline, which can save installation time and reduce leakage sources caused by drilling holes, thereby realizing fully online installation.

[0034] The pipeline connection component 6 is used to connect with the pipeline 11 to form a sampling channel that can be opened and closed; the pipeline connection component 6 includes a base 601 and a process valve 602; one end of the base 601 is connected to the pipeline 11 by welding, and the other end of the base 601 is connected to the process valve 602 by flange connection; the process valve 602 is formed with an upper flange 6021, and the upper flange 6021 is used to connect with a pressure hole opener or the sealing component 7. The base 601 is used to connect the process valve 602 at the upper end of the base, and the pipeline and the outer wall of the pipeline are connected by welding without damaging the pipeline. The upper flange can be connected to the pressure hole opener or the sealing component. When installing the pipeline connection component, first place the base at the determined installation position on the pipeline, then connect it to the pipeline by welding, and connect the process valve to the base by flange connection. Then connect the pressure hole opener to the process valve, open the process valve and use the pressure hole opener to open the hole, and after completion, use hydraulic pressure to make the drill of the pressure hole opener higher than the valve core to open and close the valve. There is no gas source leakage in this process, and the pressure hole opener can be disassembled after closing the process valve. This method can achieve online installation of the device provided by this application without stopping the pipeline.

[0035] The sealing component 7 is connected to the pipe connection component 6, and a cavity structure penetrating both ends of the sealing component 7 is formed on the inner side of the sealing component 7; after the pipe connection component and the sealing component are chain-connected, in order to ensure a better sealing effect, the pipe connection component and the sealing component are connected by flange connection. Specifically, the sealing component 7 includes a fixed part 701, a movable part 702, and a sealing ring 703 with a V-shaped cross section located between the fixed part 701 and the movable part 702; the fixed part 701 and the movable part 702 are connected by a plurality of bolts 704 uniformly arranged along the circumference of the movable part 702, and the plurality of bolts are used to adjust 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 the first state, the distance between the fixed part and the movable part in the axial direction is the smallest, so as to press the sealing ring into the cavity structure and the differential pressure flowmeter to achieve sealing. The sealing ring can be a graphite sealing ring. The lower end of the sealing assembly is connected and sealed with the upper end of the process valve through a French joint, and the upper end is sealed with four sets of bolts through the graphite sealing principle to fix the metal sealing device and the differential pressure flowmeter after adjusting the insertion depth and direction.

[0036] Among them, when the differential pressure flowmeter 1 is in the first state, the pipe connecting assembly 6 is used to open the sampling channel so that the first end of the differential pressure flowmeter passes through the cavity structure and the sampling channel in sequence and extends to the interior of the pipeline, and the sealing assembly 7 is used to seal the gap between the cavity structure and the differential pressure flowmeter; when the differential pressure flowmeter 1 is in the second state, the pipe connecting assembly is used to close the sampling channel.

[0037] It should be noted that the first state provided in the present application refers to the working state of the differential pressure flowmeter, and the second state refers to the shutdown state of the differential pressure flowmeter. The second state can be when the differential pressure flowmeter needs to be repaired and is taken out of the pipeline. In order to facilitate the switching of the differential pressure flowmeter between the first state and the second state more labor-saving, a drive assembly is also included, and the drive assembly is used to realize the switching of the differential pressure flowmeter between the first state and the second state. Specifically, the drive assembly includes two drive screws 9, and the axial directions of the two drive screws 9 are parallel to the axis of the differential pressure flowmeter 1; one end of each of the two drive screws 9 is connected to the drive fixing disk 10, and the drive fixing disk 10 is fixedly connected to the differential pressure flowmeter 1; the other end of each of the two drive screws is connected to the two threaded holes formed by the pipeline connection assembly or the sealing assembly one by one. As shown in the attached Figure 1 As shown in , two threaded holes may be formed on the fixing portion of the sealing assembly.

[0038] In summary, the differential pressure flow metering device provided by the present application has a simple and reasonable structure and uses a small pressure loss in the pipeline. It can be fully installed and maintained online without stopping production. It can be used for industrial pipeline flow metering, put an end to the existing indiscriminate discharge and storage of industrial energy, and realize fine energy management. It can be installed and used in existing domestic flow metering equipment to achieve online installation and subsequent maintenance without stopping production. The equipment installation and maintenance costs are greatly reduced, and integrated installation can be achieved. There is no need to open extra installation holes for accessories on the pipeline, such as temperature compensation installation, pressure compensation installation, etc., which reduces the leakage source caused by the opening and enhances safety.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A differential pressure flow metering device, characterized in that: include: A differential pressure flowmeter, wherein a high-pressure sampling hole and a low-pressure sampling hole are formed at a first end of the differential pressure flowmeter, a pressure terminal is connected to a second end of the differential pressure flowmeter, and a flow transmitter is connected to the pressure terminal; the pressure terminal comprises a three-valve group, and the flow transmitter is connected to the pressure terminal through the three-valve group; a temperature compensation component and a pressure compensation component, wherein the temperature compensation component and the pressure compensation component are respectively connected to a position of the differential pressure flowmeter close to the second end and are both in conduction with the interior of the differential pressure flowmeter; A pipeline connecting assembly, the pipeline connecting assembly is used to connect with the pipeline to form a sampling channel that can be opened and closed; A sealing component, the sealing component is connected to the pipeline connecting component, and a cavity structure penetrating both ends of the sealing component is formed on the inner side of the sealing component; A drive assembly, the drive assembly is used to realize the switching of the differential pressure flowmeter between a first state and a second state; Wherein, when the differential pressure flowmeter is in the first state, the pipeline connection assembly is used to open the sampling channel so that the first end of the differential pressure flowmeter sequentially passes through the cavity structure and the sampling channel to extend to the inside of the pipeline, and the sealing assembly is used to seal the gap between the cavity structure and the differential pressure flowmeter; when the differential pressure flowmeter is in the second state, the pipeline connection assembly is used to close the sampling channel; The pipeline connection assembly is connected to the sealing assembly by a flange connection; the pipeline connection assembly includes a base and a process valve; one end of the base is connected to the pipeline by welding, and the other end of the base is connected to the process valve by a flange connection; the process valve is formed with an upper flange, and the upper flange is used to connect to a pressure hole opener or the sealing assembly; The sealing assembly includes a fixed part, a movable part and a sealing ring with a V-shaped cross-section located between the fixed part and the movable part; the fixed part and the movable part are connected by a plurality of bolts evenly arranged along the circumference of the movable part, and the plurality of bolts are used to adjust 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 the first state, the distance between the fixed part and the movable part in the axial direction is the smallest so as to press the sealing ring into the cavity structure and the differential pressure flowmeter to achieve sealing; the sealing ring is a graphite sealing ring.

2. The differential pressure flow metering device according to claim 1, characterized in that: The pressure terminal is formed with two purge connection ports, and the two purge connection ports are respectively connected to the high-pressure sampling channel and the low-pressure sampling channel of the differential pressure flowmeter.

3. The differential pressure flow metering device according to claim 1, characterized in that: The driving assembly includes two driving screws, the axial directions of the two driving screws are parallel to the axis of the differential pressure flowmeter; one end of each of the two driving screws is connected to a driving fixed disk, and the driving fixed disk is fixedly connected to the differential pressure flowmeter; the other end of each of the two driving screws is connected one-to-one with two threaded holes formed by the pipeline connection assembly or the sealing assembly.

4. The differential pressure flow metering device according to any one of claims 1 to 3, characterized in that: 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.

Images