Balancing bar flowmeter

Abstract

The embodiment of the utility model provides a balance bar flowmeter, and relates to the technical field of flow measurement. The balance bar flow meter comprises a measuring pipe body, the measuring pipe body is arranged in an industrial pipeline, a measuring pipe section is arranged on the measuring pipe body, a mounting flange and a companion flange are arranged at the upper end of the measuring pipe section, a conversion connector is arranged at the upper end of the mounting flange, and the positive pressure side and the negative pressure side of the conversion connector are connected with a three-valve set. And a differential pressure transmitter is arranged at the upper end of the three-valve group. According to the utility model, a plug-in flow meter structure is designed, so that the device has the advantages of small volume, light overall weight and convenience in installation, can be installed and disassembled under the condition of pressure, is convenient to maintain and replace, is very small in instrument pressure loss, reduces industrial energy consumption, improves the production efficiency, improves the technical economy of instrument calibration, and is suitable for popularization and application. The current type flow sensor of one specification can be used for various pipeline diameters, the number of standby instruments and spare parts is reduced, and the application range is wider.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flow measurement, in particular to a balanced differential pressure flowmeter. BACKGROUND

[0002] The differential pressure flowmeter belongs to a commonly used measuring instrument for measuring the flow of liquid, gas or steam in a pipeline, which is widely used in various fields such as petroleum, chemical industry, natural gas, food and beverage processing, sewage treatment, etc. However, with the development of the times, the accuracy and range ratio of flowmeter measurement are increasingly required, thus various flowmeters suitable for various purposes have been derived, such as electromagnetic flowmeters, vortex flowmeters, turbine flowmeters, differential pressure flowmeters, etc.

[0003] The differential pressure flowmeter has a long history and is the most widely used among various flowmeters. It takes Bernoulli's equation and the continuity equation of flow as the basic principles, measures the pressure difference generated by the throttling element in the pipeline, and combines the known working conditions to obtain the flow. The differential pressure flowmeter is composed of a primary device (detection piece) and a secondary device (differential pressure converter and flow display instrument).

[0004] The shortcomings of the three traditional throttling devices (Venturi tube, standard orifice plate, and standard nozzle) are as follows: 1. Large pressure loss; 2. Narrow range ratio, since the flow coefficient is related to the Reynolds number, the general range ratio is only 3:1-4:1; 3. The repeatability and accuracy of measurement are at a medium level in the flow sensor, and the accuracy is difficult to improve due to the complex influence of numerous factors; 4. Higher requirements for field installation, which requires a longer straight pipe section, at least 5D in front and 5D in back, which is generally difficult to meet, increasing the initial operation cost, especially for larger pipe diameters, the problem is more prominent; 5. Higher construction cost. SUMMARY

[0005] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a balanced differential pressure flowmeter with higher accuracy, smaller permanent pressure loss, better long-term stability, lower straight pipe section requirement, plug-and-play installation and maintenance convenience, and suitability for measuring various media.

[0006] The present application is implemented as follows:

[0007] The present application provides a balanced differential pressure flowmeter, comprising: a measuring pipe body arranged in an industrial pipeline, a measuring pipe section provided on the measuring pipe body, an installation flange and a matching flange provided on the upper end of the measuring pipe section, a conversion connector provided on the upper end of the installation flange, the positive and negative pressure measurements of the conversion connector connected with a three-valve group respectively, and a differential pressure transmitter provided on the upper end of the three-valve group.

[0008] The balanced bar flowmeter according to the embodiment of the application, the measuring pipe body is provided with a positive pressure measuring port and a negative pressure measuring port, a differential pressure throttling member is arranged at the middle position between the positive pressure measuring port and the negative pressure measuring port, and the measuring pipe segment is vertically arranged on the upper end of the positive pressure measuring port and the negative pressure measuring port.

[0009] The balanced bar flowmeter according to the embodiment of the application, the industrial pipeline is provided with a mounting pipe, and the matched flange is fixedly mounted on the mounting pipe.

[0010] The balanced bar flowmeter according to the embodiment of the application, the matched flange is matched with the mounting flange, and the matched flange and the mounting flange are connected and fixed by a plurality of fasteners.

[0011] The balanced bar flowmeter according to the embodiment of the application, the upper surface of the matched flange is fixedly connected with a limiting rod, the mounting flange is provided with a limiting hole matched with the limiting rod, and the limiting rod is inserted into the limiting hole in correspondence.

[0012] The balanced bar flowmeter according to the embodiment of the application, the lower surface of the mounting flange is provided with a mounting groove, the inner wall of the top of the mounting groove is provided with a clamping ring, a first sealing ring is mounted in the mounting groove, the first sealing ring is provided with a first clamping groove and a second clamping groove at the upper end and the lower end respectively, and the first clamping groove is clamped with the clamping ring.

[0013] The balanced bar flowmeter according to the embodiment of the application, the upper end of the matched flange is internally mounted with a second sealing ring, the second sealing ring is provided with a sealing clamping ring, and the sealing clamping ring is sealingly clamped with the second clamping groove.

[0014] The balanced bar flowmeter according to the embodiment of the application, the outer peripheral surface of the mounting pipe is fixedly mounted with a pressure gauge, and the bottom of the pressure gauge is connected with a detection head through a connecting pipeline.

[0015] The balanced bar flowmeter according to the embodiment of the application, the mounting pipe is sleeved with a abutting assembly, the abutting assembly comprises an outer sleeve and an inner sleeve, the inner sleeve is fixedly sleeved on the mounting pipe, the outer sleeve is threadedly sleeved on the inner sleeve, the bottom of the outer sleeve is provided with a sealing sleeve, and the sealing sleeve is sealingly sleeved at the connecting position of the industrial pipeline and the mounting pipe.

[0016] The balanced bar flowmeter according to the embodiment of the application, the inner sleeve and the sealing sleeve are respectively provided with a through hole and a wire slot at the upper end, the connecting pipeline penetrates through the through hole and the wire slot, and the detection head is arranged in the inner part of the sealing sleeve.

[0017] The balanced bar flowmeter according to the embodiment of the application, the outer sleeve and the sealing sleeve are respectively provided with a through hole and a wire slot at the upper end, the connecting pipeline penetrates through the through hole and the wire slot, and the detection head is arranged in the inner part of the sealing sleeve.

[0018] 1. The plug-in flowmeter structure has the advantages of small volume, light overall quality and convenient installation, can be installed and disassembled under pressure, is convenient to maintain and replace, has very small instrument pressure loss, and the pressure loss of the fluid can be ignored, thereby reducing industrial energy consumption and improving production efficiency, is suitable for harsh working environments such as corrosion, dirt, high temperature and high pressure, can greatly increase the reliability of the instrument, the large-diameter point flow plug-in flowmeter is simple to calibrate, the diameter of the calibration device does not need to correspond to the diameter of the flowmeter, and the technical economy of instrument calibration is greatly improved, the plug-in flowmeter is suitable for various fluid types, working conditions and pipe diameters, one size of current type flow sensor can be used for various pipe diameters, the number of spare instruments and spare parts is reduced, and the application range is wider.

[0019] 2. The first sealing ring and the second sealing ring are arranged on the installation flange and the matched flange, the first sealing ring and the second sealing ring are clamped, and the sealing performance of the installation flange and the matched flange is improved.

[0020] 3. The sealing sleeve and the pressure gauge are arranged on the connecting part of the installation pipe and the industrial pipeline, the sealing condition of the connecting part of the installation pipe and the industrial pipeline can be intuitively reflected, when leakage occurs, the operator can timely process, the sealing performance of the flowmeter installation is guaranteed, and the detection accuracy is improved. DETAILED DESCRIPTION

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor.

[0022] Figure 1 is a schematic view of the three-dimensional structure of the traditional throttling device Venturi tube;

[0023] Figure 2 is a schematic view of the three-dimensional assembly of the overall structure according to the first embodiment of the present application;

[0024] Figure 3 is a front view of the overall structure according to the first embodiment of the present application;

[0025] Figure 4 is an enlarged view of the structure at A according to the first embodiment of the present application; Figure 3

[0026] Figure 5 is a side view of the overall structure according to the first embodiment of the present application;

[0027] Figure 6 ​is a whole structure perspective assembly schematic diagram according to the second embodiment of the present application;

[0028] Figure 7 is a partial structure explosion diagram according to the second embodiment of the present application;

[0029] Figure 8 is a top structure schematic diagram according to the second embodiment of the present application;

[0030] Figure 9 is a B-B section perspective structure schematic diagram according to the second embodiment of the present application; Figure 8

[0031] Figure 10 is a C structure enlarged view according to the second embodiment of the present application; Figure 9

[0032] Figure 11 is a D structure enlarged view according to the second embodiment of the present application; Figure 9

[0033] Figure 12 is a first sealing ring and a second sealing ring section explosion schematic diagram according to the second embodiment of the present application.

[0034] In the figure: 1, measuring pipe body; 2, measuring pipe section; 3, mounting flange; 4, conversion connector; 5, valve group; 6, transmitter; 7, industrial pipeline; 8, matching flange; 9, mounting pipe; 31, limiting hole; 32, mounting groove; 33, snap ring; 34, first sealing ring; 341, first clamping groove; 342, second clamping groove; 81, limiting rod; 82, second sealing ring; 83, sealing snap ring; 10, fastener; 101, connecting pipeline; 102, detection head; 11, abutting assembly; 111, outer sleeve; 112, inner sleeve; 113, through hole; 12, sealing sleeve; 121, wire slot; 13, pressure gauge. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

[0036] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0037] Embodiment one

[0038] As Figures 2-5 ​​​As shown, according to the embodiment of the application, the balanced bar flowmeter comprises a measuring pipe body 1, the measuring pipe body 1 is arranged in an industrial pipeline 7, the measuring pipe body 1 is provided with a measuring pipe section 2, the upper end of the measuring pipe section 2 is provided with a mounting flange 3 and a matching flange 8, the upper end of the mounting flange 3 is provided with a conversion connector 4, the conversion connector 4 is connected with a three-valve group 5, and the upper end of the three-valve group 5 is provided with a differential pressure transmitter 6.

[0039] The measuring pipe body 1 is provided with a positive pressure measuring port and a negative pressure measuring port, a differential pressure throttling member is arranged at the middle position between the positive pressure measuring port and the negative pressure measuring port, the measuring pipe section 2 is vertically arranged at the upper end of the positive pressure measuring port and the negative pressure measuring port, the industrial pipeline 7 is provided with a mounting pipe 9, the matching flange 8 is fixedly arranged on the mounting pipe 9, the matching flange 8 is matched with the mounting flange 3, and the matching flange 8 and the mounting flange 3 are connected and fixed through a plurality of fasteners 10.

[0040] In the application, the outer end surface of the measuring pipe body 1 is provided with a positive pressure measuring port and a negative pressure measuring port, the differential pressure throttling member is arranged at the middle position between the positive pressure measuring port and the negative pressure measuring port, the measuring pipe is arranged at the middle position of the mounting flange 3 of the measuring pipe body 1, the upper end of the mounting flange 3 is provided with the conversion connector 4, the conversion connector 4 transmits the positive pressure and the negative pressure to the valve group 5, the left and right ends of the conversion connector 4 are provided with exhaust holes, the upper end of the valve group 5 is provided with the transmitter 6, the upper end surface of the industrial pipeline 7 is provided with the matching flange 8, the mounting flange 3 and the matching flange 8 are assembled, and when the fluid in the industrial pipeline 7 flows through the differential pressure throttling member of the measuring pipe body 1, the fluid will cause rapid local contraction near the throttling, the flow velocity increases and the static pressure decreases, a static pressure difference is generated before and after the throttling member, the flow signal is collected by the measuring pipe section 2, is introduced to the transmitter 6 through the valve group 5 of the conversion connector 4, and then the flow of the fluid is calculated.

[0041] Compared with the traditional throttling device, the technical scheme has the following advantages:

[0042] Convenient installation and maintenance: the plug-in balanced bar flowmeter has small volume, light overall quality, convenient installation, can be installed and disassembled under pressure, and is convenient for maintenance and replacement.

[0043] Low pressure loss: the instrument pressure loss of the plug-in flowmeter is very small, the pressure loss of the fluid can be ignored, the industrial energy consumption is reduced, and the production efficiency is improved.

[0044] High reliability: the plug-in flowmeter is particularly suitable for harsh working environments such as corrosion, dirt, high temperature and high pressure, and can greatly increase the reliability of the instrument.

[0045] Simple calibration: the large-diameter point flow plug-in flowmeter is simple to calibrate, the diameter of the calibration device does not need to correspond to the diameter of the flowmeter, and the technical economy of the instrument calibration is greatly improved.

[0046] Wide application range: the plug-in flowmeter is suitable for various fluid types, working conditions and pipe diameters, and one size of current type flow sensor can be used for various pipe diameters, thereby reducing the number of backup instruments and spare parts.

[0047] Embodiment two

[0048] As Figure 2 , Figures 6-12 shown, to solve the problems of simple structure, poor sealing performance and inconvenient detection of the sealing performance of the flowmeter installation of the traditional flange connection, the first sealing ring 34 and the second sealing ring 82 are arranged on the installation flange 3 and the matched flange 8, the sealing performance of the installation flange 3 and the matched flange 8 is improved by clamping the first sealing ring 34 and the second sealing ring 82, the sealing sleeve 12 and the pressure gauge 13 are arranged to detect the pressure of the connection part of the installation pipe 9 and the industrial pipeline 7, the sealing performance of the flowmeter installation is ensured, and the detection accuracy is improved.

[0049] The matched flange 8 is fixedly connected with a limiting rod 81 on the upper surface, the installation flange 3 is provided with a limiting hole 31 matched with the limiting rod 81, the limiting rod 81 is inserted into the limiting hole 31 in correspondence, the installation flange 3 is provided with an installation groove 32 on the lower surface, the installation groove 32 is provided with a clamping ring 33 on the top inner wall, the first sealing ring 34 is installed in the installation groove 32, the first sealing ring 34 is provided with a first clamping groove 341 and a second clamping groove 342 at the upper end and the lower end respectively, the first clamping groove 341 is clamped with the clamping ring 33, the second sealing ring 82 is installed in the matched flange 8, and the second sealing ring 82 is provided with a sealing clamping ring 83, and the sealing clamping ring 83 is clamped with the second clamping groove 342.

[0050] Specifically, during installation, the first sealing ring 34 is fixed in the installation groove 32 by clamping the first clamping groove 341 into the clamping ring 33, the second sealing ring 82 is installed in the matched flange 8, the limiting rod 81 is inserted into the limiting hole 31 in correspondence, which can preliminarily position the installation flange 3 and the matched flange 8, and ensure that they can be quickly and accurately aligned during connection, during the connection process, the sealing clamping ring 83 is clamped into the second clamping groove 342, the sealing connection of the first sealing ring 34 and the second sealing ring 82 is realized, the sealing performance is improved by the double sealing ring structure, the leakage of the fluid in the industrial pipeline 7 from the connection part of the installation flange 3 and the matched flange 8 is effectively prevented, and the accuracy and stability of the flowmeter measurement are ensured.

[0051] A pressure gauge 13 is fixedly installed on the outer circumferential surface of the mounting pipe 9, and a detection head 102 is connected to the bottom of the pressure gauge 13 through a connecting pipe 101; a pressing assembly 11 is sleeved on the mounting pipe 9, and the pressing assembly 11 comprises an outer sleeve 111 and an inner sleeve 112; the inner sleeve 112 is fixedly sleeved on the mounting pipe 9, and the outer sleeve 111 is threadedly sleeved on the inner sleeve 112; a sealing sleeve 12 is arranged at the bottom of the outer sleeve 111, and the sealing sleeve 12 is sealingly connected to the connecting position of the industrial pipeline 7 and the mounting pipe 9; a through hole 113 and a wire slot 121 are respectively arranged at the upper end of the inner sleeve 112 and the sealing sleeve 12, and the connecting pipe 101 penetrates through the through hole 113 and the wire slot 121; and the detection head 102 is arranged in the sealing sleeve 12.

[0052] In the specific arrangement, the bottom of the pressure gauge 13 is connected to the detection head 102 through the connecting pipe 101; the connecting pipe 101 penetrates through the through hole 113 and the wire slot 121 arranged at the upper part of the sealing sleeve 12; the detection head 102 is located in the sealing sleeve 12; the sealing sleeve 12 is pressed against the outer surfaces of the mounting pipe 9 and the industrial pipeline 7, so that the connecting part of the mounting pipe 9 and the industrial pipeline 7 is sealed; the detection head 102 detects the pressure in the sealing cavity; if leakage occurs at the connecting part, the internal pressure changes, the detected value of the pressure gauge 13 changes, and thus the sealing condition of the connecting part is directly reflected, and the operator can timely process it.

[0053] In the specific arrangement, the bottom of the pressure gauge 13 is connected to the detection head 102 through the connecting pipe 101; the connecting pipe 101 penetrates through the through hole 113 and the wire slot 121 arranged at the upper part of the sealing sleeve 12; the detection head 102 is located in the sealing sleeve 12; the sealing sleeve 12 is pressed against the outer surfaces of the mounting pipe 9 and the industrial pipeline 7, so that the connecting part of the mounting pipe 9 and the industrial pipeline 7 is sealed; the detection head 102 detects the pressure in the sealing cavity; if leakage occurs at the connecting part, the internal pressure changes, the detected value of the pressure gauge 13 changes, and thus the sealing condition of the connecting part is directly reflected, and the operator can timely process it.

[0054] In summary, the working principle of the balanced flowmeter in the embodiment of the application is as follows:

[0055] When the fluid in the industrial pipeline 7 flows through the differential pressure throttling element of the measuring pipe body 1, the fluid will cause rapid local contraction near the throttle, the flow rate will increase and the static pressure will decrease, and a static pressure difference will be generated before and after the throttling element; the measuring pipe section 2 collects the flow signal, and the signal is introduced to the transmitter 6 through the valve group 5 of the conversion connector 4, and then the flow rate of the fluid is calculated.

[0056] When installing, the first clamping groove 341 is clamped into the clamping ring 33, the first sealing ring 34 is fixed in the mounting groove 32, the second sealing ring 82 is installed in the matched flange 8, the limiting rod 81 is inserted into the limiting hole 31, the mounting flange 3 and the matched flange 8 are preliminarily positioned, the two can be quickly and accurately aligned when connected, the sealing ring 83 is clamped into the second clamping groove 342 during the connection process, the sealing connection of the first sealing ring 34 and the second sealing ring 82 is realized, the sealing property is improved through the double sealing ring sealing structure, the fluid in the industrial pipeline 7 is prevented from leaking from the connection part of the mounting flange 3 and the matched flange 8, and the accuracy and stability of the flowmeter measurement are ensured.

[0057] Through the threaded cooperation between the outer sleeve 111 and the inner sleeve 112, the outer sleeve 111 gradually moves downward when rotating, extruding the sealing sleeve 12, and making the sealing sleeve 12 tightly abut against the industrial pipeline 7 and the mounting pipe 9, the mounting pipe 9 is connected with the industrial pipeline 7, the sealing cavity is sealed, the pressure in the sealing cavity is detected by the detection head 102, if the connection part leaks, the internal pressure changes, the pressure gauge 13 detects the change of the value, and the sealing condition of the connection part is directly reflected, and the operator can process in time.

[0058] The electronic elements and models used in the application can be selected according to actual needs.

[0059] The above only describes the embodiments of the application and does not limit the protection scope of the application. For those skilled in the art, the application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0060] The above only describes the embodiments of the application and does not limit the protection scope of the application. For those skilled in the art, the application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0060] The above only describes the embodiments of the application and does not limit the protection scope of the application. For those skilled in the art, the application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

Claims

1. A balanced flowmeter, characterized by, Including the measuring pipe body (1), the measuring pipe body (1) is arranged in the industrial pipeline (7), the measuring pipe body (1) is equipped with measuring pipe section (2), the upper end of the measuring pipe section (2) is equipped with installation flange (3) and matching flange (8), the upper end of the installation flange (3) is equipped with conversion connector (4), and the conversion connector (4) is connected with three valve groups (5) respectively, and the upper end of the three valve groups (5) is equipped with differential pressure transmitter (6).

2. The balanced flow meter of claim 1, wherein, The measuring pipe body (1) is provided with a positive pressure measuring pressure port and a negative pressure measuring pressure port, and a differential pressure throttling member is arranged at the intermediate position between the positive and negative pressure ports.

3. The balanced flow meter of claim 2, wherein, The industrial pipeline (7) is provided with an installation pipe (9), and the matching flange (8) is fixedly installed on the installation pipe (9).

4. The balanced flow meter of claim 3, wherein, The matching flange (8) is matched with the installation flange (3), and the matching flange (8) and the installation flange (3) are connected and fixed by a plurality of fasteners (10).

5. The balanced flow meter of claim 1, wherein, The upper surface of the matching flange (8) is fixedly connected with a limiting rod (81), the installation flange (3) is provided with a limiting hole (31) matched with the limiting rod (81), and the limiting rod (81) is inserted into the limiting hole (31) correspondingly.

6. The balanced flow meter of claim 1, wherein, The lower surface of the installation flange (3) is provided with an installation groove (32), the top inner wall of the installation groove (32) is provided with a clamping ring (33), the first sealing ring (34) is installed in the installation groove (32), the first sealing ring (34) is provided with a first clamping groove (341) and a second clamping groove (342) at the upper end and the lower end respectively, and the first clamping groove (341) is clamped with the clamping ring (33).

7. The balanced flow meter of claim 6, wherein, The second sealing ring (82) is installed in the inner upper end of the matching flange (8), the second sealing ring (82) is provided with a sealing clamping ring (83), and the sealing clamping ring (83) is sealingly clamped with the second clamping groove (342).

8. The balanced flow meter of claim 3, wherein, The pressure gauge (13) is fixedly installed on the outer circumferential surface of the installation pipe (9), and the detection head (102) is connected to the bottom of the pressure gauge (13) through the connecting pipeline (101).

9. The balanced flow meter of claim 8, wherein, The installation pipe (9) is provided with a abutting assembly (11), the abutting assembly (11) comprises an outer sleeve (111) and an inner sleeve (112), the inner sleeve (112) is fixedly sleeved on the installation pipe (9), the outer sleeve (111) is threadedly sleeved on the inner sleeve (112), the outer sleeve (111) is provided with a sealing sleeve (12) at the bottom, and the sealing sleeve (12) is connected to the connection between the industrial pipeline (7) and the installation pipe (9).

10. The balanced flow meter of claim 9, wherein, The inner sleeve (112) and the sealing sleeve (12) are provided with through holes (113) and wire grooves (121) at the upper ends respectively, the connecting pipeline (101) penetrates through the through holes (113) and the wire grooves (121), and the detection head (102) is arranged in the sealing sleeve (12).

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