Balancing bar flowmeter

Abstract

The embodiment of the invention 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, and in particular to a balanced bar flow meter. Background Art

[0002] The differential pressure flowmeter is a commonly used measuring instrument for measuring the flow of liquid, gas or steam in a pipeline. It 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 requirements for the accuracy and range ratio of flowmeter measurement are getting higher and higher. Therefore, various types of flowmeters suitable for various purposes have been derived, such as electromagnetic flowmeter, vortex flowmeter, turbine flowmeter, differential pressure flowmeter, etc.

[0003] The differential pressure flowmeter has a long history and is the most widely used of all types of flowmeters. It is based on the Bernoulli equation and the flow continuity equation as the basic principles. It measures the pressure difference generated by the fluid in the pipeline passing through the throttling element and combines the known operating conditions to obtain the flow rate. The differential pressure flowmeter consists of a primary device (detection device) and a secondary device (differential pressure conversion and flow display instrument).

[0004] The shortcomings of the three existing traditional throttling devices (Venturi tube, standard orifice plate, 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 is only 3:1 to 4:1; 3. The repeatability and accuracy of the measurement are at a medium level among flow sensors. Due to the complex influence of many factors, it is difficult to improve the accuracy; 4. The on-site installation requirements are high, and a long straight pipe section is required, at least 5D in front and 5D in the back, which is generally difficult to meet, increasing the initial operating cost, especially for larger pipe diameters, the problem is more prominent; 5. The construction cost is high. Summary of the invention

[0005] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a balanced bar flow meter with higher accuracy, smaller permanent pressure loss, better long-term stability, lower straight pipe section requirements, more convenient plug-and-play installation and maintenance, and suitable for measuring various media.

[0006] This application is implemented as follows:

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

[0008] According to the balanced bar flowmeter of the embodiment of the present application, a positive pressure measuring port and a negative pressure measuring port are opened on the measuring tube body, a differential pressure throttling device is arranged at the middle position of the positive and negative pressure measuring sides, and the measuring tube section is vertically arranged at the upper ends of the positive and negative pressure measuring ports.

[0009] According to the balanced bar flowmeter of the embodiment of the present application, a mounting pipe is provided on the industrial pipeline, and the matching flange is fixedly mounted on the mounting pipe.

[0010] According to the balanced bar flowmeter of the embodiment of the present application, the matching flange is adapted to the mounting flange, and the matching flange and the mounting flange are connected and fixed by a plurality of fasteners.

[0011] According to the balanced bar flowmeter of the embodiment of the present application, a limit rod is fixedly connected to the upper surface of the matching flange, a limit hole matched with the limit rod is opened on the mounting flange, and the limit rod is correspondingly plugged into the limit hole.

[0012] According to the balanced bar flowmeter of the embodiment of the present application, a mounting groove is provided on the lower surface of the mounting flange, a retaining ring is provided on the top inner wall of the mounting groove, a first sealing ring is installed in the mounting groove, and a first retaining groove and a second retaining groove are respectively provided at the upper and lower ends of the first sealing ring, and the first retaining groove is clamped with the retaining ring.

[0013] According to the balanced bar flowmeter of the embodiment of the present application, a second sealing ring is installed inside the upper end of the matching flange, a sealing clamp ring is provided on the second sealing ring, and the sealing clamp ring is sealingly clamped with the second clamping groove.

[0014] According to the balanced bar flowmeter of the embodiment of the present application, a pressure gauge is fixedly mounted on the outer circumferential surface of the mounting tube, and a detection head is connected to the bottom of the pressure gauge via a connecting pipe.

[0015] According to the balanced bar flowmeter of the embodiment of the present application, a tightening assembly is sleeved on the mounting tube, and the tightening assembly includes an outer sleeve and an inner sleeve, the inner sleeve is fixedly sleeved on the mounting tube, the outer sleeve is threadedly sleeved on the inner sleeve, a sealing sleeve is provided at the bottom of the outer sleeve, and the sealing sleeve is sealingly sleeved at the connection between the industrial pipeline and the mounting tube.

[0016] According to the balanced bar flowmeter of the embodiment of the present application, the inner sleeve and the upper end of the sealing sleeve are respectively provided with a through hole and a wire groove, the connecting pipe passes through the through hole and the wire groove, and the detection head is arranged inside the sealing sleeve

[0017] Beneficial effects of the present invention:

[0018] 1. The insertion flow meter structure designed in the present invention has the advantages of small size, light overall weight and easy installation. It can be installed and disassembled under pressure, which is convenient for maintenance and replacement. The pressure loss of the instrument is very small, and the pressure loss of the fluid is almost negligible, which reduces industrial energy consumption and thus improves production efficiency. It is suitable for harsh working environments such as corrosion, dirt, high temperature and high pressure environments, and can greatly increase the reliability of the instrument. The large-caliber point flow type insertion flow meter is easy to calibrate, and there is no need to calibrate the diameter of the device to correspond to the diameter of the flow meter one by one, which greatly improves the technical and economic efficiency of the instrument calibration. The insertion flow meter is suitable for a variety of fluid types, working conditions and pipeline diameters. A current type flow sensor of one specification can be used for a variety of pipeline diameters, which reduces the number of spare instruments and spare parts and has a wider range of applications.

[0019] 2. The present invention arranges a first sealing ring and a second sealing ring on the mounting flange and the matching flange, and improves the sealing performance of the mounting flange and the matching flange by clamping the first sealing ring and the second sealing ring.

[0020] 3. The present invention performs pressure detection on the connection between the installation pipe and the industrial pipeline by arranging a sealing sleeve and a pressure gauge, which can intuitively reflect the sealing condition of the connection between the installation pipe and the industrial pipeline. When leakage occurs, the operator can handle it in time to ensure the sealing of the flow meter installation and improve the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a three-dimensional structural diagram of the traditional throttling device Venturi tube;

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

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

[0025] Figure 4 According to this application Figure 3 A magnified view of the structure at center;

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

[0027] Figure 6This is a schematic diagram of the overall structure of the second embodiment of the present application;

[0028] Figure 7 It is an exploded view of the local structure according to the second embodiment of the present application;

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

[0030] Fig. 9 According to the embodiment of the present application Figure 8 Schematic diagram of the three-dimensional structure of the middle BB section;

[0031] Fig.10 According to the embodiment of the present application Fig. 9 A magnified view of the structure at C in the middle;

[0032] Fig.11 According to the embodiment of the present application Fig. 9 A magnified view of the structure at D in the middle;

[0033] Fig.12 It is a schematic cross-sectional explosion diagram of the first sealing ring and the second sealing ring in the second embodiment of the present application.

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

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

[0036] In order to make the purpose, technical solutions and advantages of the implementation methods of this application clearer, the technical solutions in the implementation methods of this application will be clearly and completely described below in conjunction with the drawings in the implementation methods of this application. Obviously, the described implementation methods are part of the implementation methods of this application, not all of the implementation methods. Based on the implementation methods in this application, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] Embodiment 1

[0038] like Figure 2-Figure 5As shown, a balanced bar flowmeter according to an embodiment of the present application includes a measuring tube body 1, which is arranged in an industrial pipeline 7. A measuring tube section 2 is provided on the measuring tube body 1, and a mounting flange 3 and a matching flange 8 are provided at the upper end of the measuring tube section 2. A conversion connector 4 is provided at the upper end of the mounting flange 3. The positive and negative pressure measurements of the conversion connector 4 are respectively connected to the three-valve group 5, and a differential pressure transmitter 6 is provided at the upper end of the three-valve group 5.

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

[0040] In the present application, the outer end face of the measuring tube body 1 is provided with positive and negative pressure measuring ports, the differential pressure throttling device is arranged at the middle position of the positive and negative pressure taking sides, the measuring pipeline is arranged at the middle position of the mounting flange 3 of the measuring tube body 1, and a conversion connector 4 is provided at the upper end of the mounting flange 3. The conversion connector 4 transmits the positive and negative pressure measurement flow to the valve group 5. The left and right ends of the conversion connector 4 are provided with exhaust holes, and the upper end of the valve group 5 is provided with a transmitter 6. The upper end face opening of the industrial pipeline 7 is provided with a matching flange 8, and the mounting flange 3 and the matching flange 8 are assembled. When the fluid in the industrial pipeline 7 flows through the differential pressure throttling device of the measuring tube body 1, the fluid will cause rapid local contraction near the throttling, the flow rate will increase and the static pressure will decrease, and a static pressure difference will be generated before and after the throttling device. The measuring pipe section 2 collects the flow signal, which is led to the transmitter 6 through the conversion connector 4 valve group 5, and then the flow rate of the fluid is obtained by calculation.

[0041] Compared with the traditional throttling device, the advantages of this technical solution are:

[0042] Easy to install and maintain: The insertion balanced bar flow meter is small in size, light in overall weight, and easy to install. It can be installed and disassembled under pressure, which is convenient for maintenance and replacement.

[0043] Low pressure loss: The instrument pressure loss of the insertion flow meter is very small, and the pressure loss of the fluid is almost negligible, which reduces industrial energy consumption and thus improves production efficiency.

[0044] High reliability: Insertion flowmeters are particularly suitable for harsh working environments, such as corrosion, dirt, high temperature and high pressure, which can greatly increase the reliability of the instrument.

[0045] Easy calibration: Large-diameter point-flow insertion flowmeters are easy to calibrate. There is no need to calibrate the diameter of the device to match the diameter of the flowmeter, which greatly improves the technical and economic efficiency of instrument calibration.

[0046] Wide range of applications: Insertion flow meters are suitable for a variety of fluid types, working conditions and pipeline diameters. One specification of current flow sensor can be used for a variety of pipeline diameters, reducing the number of spare instruments and spare parts.

[0047] Embodiment 2

[0048] like Figure 2 , Figure 6-Figure 12 As shown, in order to solve the problems of simple sealing ring structure, poor sealing and inconvenience in detecting the sealing of the flow meter installation at the traditional flange connection, a first sealing ring 34 and a second sealing ring 82 are arranged on the mounting flange 3 and the matching flange 8. The sealing of the mounting flange 3 and the matching flange 8 is improved by clamping the first sealing ring 34 and the second sealing ring 82. A sealing sleeve 12 and a pressure gauge 13 are arranged to perform pressure detection on the connection portion between the mounting pipe 9 and the industrial pipeline 7, so as to ensure the sealing of the flow meter installation and improve the detection accuracy.

[0049] A limiting rod 81 is fixedly connected to the upper surface of the matching flange 8, a limiting hole 31 matched with the limiting rod 81 is provided on the mounting flange 3, the limiting rod 81 is correspondingly plugged into the limiting hole 31, a mounting groove 32 is provided on the lower surface of the mounting flange 3, a retaining ring 33 is provided on the top inner wall of the mounting groove 32, a first sealing ring 34 is installed in the mounting groove 32, a first retaining groove 341 and a second retaining groove 342 are respectively provided at the upper and lower ends of the first sealing ring 34, the first retaining groove 341 is clamped with the retaining ring 33, a second sealing ring 82 is installed inside the upper end of the matching flange 8, a sealing retaining ring 83 is provided on the second sealing ring 82, and the sealing retaining ring 83 is sealingly clamped with the second retaining groove 342.

[0050] Specifically, during installation, the first slot 341 is inserted into the retaining ring 33 to fix the first sealing ring 34 in the installation slot 32, and the second sealing ring 82 is installed in the matching flange 8. By correspondingly plugging the limiting rod 81 into the limiting hole 31, the installation flange 3 and the matching flange 8 can be initially positioned to ensure that the two can be quickly and accurately aligned when connected. During the connection process, the sealing retaining ring 83 is inserted into the second slot 342 to achieve a sealed connection between the first sealing ring 34 and the second sealing ring 82. The sealing structure of the double sealing ring can improve the sealing performance, effectively preventing the fluid in the industrial pipeline 7 from leaking from the connection between the installation flange 3 and the matching flange 8, thereby ensuring the accuracy and stability of the flow meter measurement.

[0051] A pressure gauge 13 is fixedly installed on the outer circumferential surface of the mounting tube 9, and a detection head 102 is connected to the bottom of the pressure gauge 13 through a connecting pipe 101. A tightening assembly 11 is sleeved on the mounting tube 9, and the tightening assembly 11 includes an outer sleeve 111 and an inner sleeve 112. The inner sleeve 112 is fixedly sleeved on the mounting tube 9, and the outer sleeve 111 is threadedly sleeved on the inner sleeve 112. A sealing sleeve 12 is provided at the bottom of the outer sleeve 111, and the sealing sleeve 12 is sealingly connected to the connection between the industrial pipeline 7 and the mounting tube 9. A through hole 113 and a wire groove 121 are respectively provided at the upper ends of the inner sleeve 112 and the sealing sleeve 12. The connecting pipe 101 passes through the through hole 113 and the wire groove 121, and the detection head 102 is arranged inside the sealing sleeve 12.

[0052] During the specific setting, the bottom of the pressure gauge 13 is connected to the detection head 102 through the connecting pipe 101. The connecting pipe 101 passes through the through hole 113 and the wire groove 121 on the upper part of the sealing sleeve 12. The detection head 102 is located inside the sealing sleeve 12. The sealing sleeve 12 is tightly pressed against the outer surfaces of the installation pipe 9 and the industrial pipeline 7 to seal the connection between the installation pipe 9 and the industrial pipeline 7. The detection head 102 detects the pressure in the sealed cavity. If there is a leak at the connection, the internal pressure changes, and the detection value of the pressure gauge 13 changes, thereby intuitively reflecting the sealing condition of the connection, and the operator can deal with it in time.

[0053] Among them, the bottom of the outer sleeve 111 is rotatably connected to the sealing sleeve 12, and the sealing sleeve 12 will not rotate under the restriction of the connecting pipe 101. Through the threaded cooperation between the outer sleeve 111 and the inner sleeve 112, the outer sleeve 111 gradually moves downward when rotating, squeezing the sealing sleeve 12 so that the sealing sleeve 12 is tightly against the industrial pipeline 7 and the installation pipe 9 to ensure the sealing of the sealing cavity. The upper end of the connecting pipe 101 is a hose to ensure that the lower end moves downward a short distance with the sealing sleeve 12.

[0054] In summary, the working principle of a balanced bar flow meter according to an embodiment of the present invention is as follows:

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

[0056] During installation, the first groove 341 is inserted into the retaining ring 33 to fix the first sealing ring 34 in the installation groove 32, and the second sealing ring 82 is installed in the matching flange 8. By correspondingly plugging the limiting rod 81 into the limiting hole 31, the installation flange 3 and the matching flange 8 can be initially positioned to ensure that the two can be quickly and accurately aligned when connected. During the connection process, the sealing retaining ring 83 is inserted into the second groove 342 to achieve a sealed connection between the first sealing ring 34 and the second sealing ring 82. The sealing structure of the double sealing ring can improve the sealing performance, effectively preventing the fluid in the industrial pipeline 7 from leaking from the connection between the installation flange 3 and the matching flange 8, thereby ensuring the accuracy and stability of the flow meter measurement.

[0057] Through the threaded cooperation between the outer sleeve 111 and the inner sleeve 112, the outer sleeve 111 gradually moves downward when rotating, squeezing the sealing sleeve 12 so that the sealing sleeve 12 is tightly pressed against the industrial pipeline 7 and the installation pipe 9, so that the connection between the installation pipe 9 and the industrial pipeline 7 is sealed. The detection head 102 detects the pressure in the sealing cavity. If there is a leak at the connection, the internal pressure changes, and the detection value of the pressure gauge 13 changes, thereby intuitively reflecting the sealing condition of the connection, and the operator can deal with it in time.

[0058] The electronic components and models used in the present invention can be selected according to actual needs.

[0059] The above description is only an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application. It should be noted that similar reference numerals 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 the subsequent drawings.

[0060] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A balanced bar flow meter, characterized in that: The invention comprises a measuring tube body (1), wherein the measuring tube body (1) is arranged in an industrial pipeline (7), a measuring tube section (2) is arranged on the measuring tube body (1), a mounting flange (3) and a matching flange (8) are arranged at the upper end of the measuring tube section (2), a conversion connector (4) is arranged at the upper end of the mounting flange (3), the positive and negative pressure measuring parts of the conversion connector (4) are respectively connected to a three-valve group (5), and a differential pressure transmitter (6) is arranged at the upper end of the three-valve group (5).

2. The balanced bar flow meter according to claim 1, characterized in that: The measuring tube body (1) is provided with a positive pressure measuring port and a negative pressure measuring port, a differential pressure throttling piece is arranged at the middle position between the positive and negative pressure measuring sides, and the measuring tube section (2) is arranged vertically at the upper ends of the positive and negative pressure measuring ports.

3. The balanced bar flow meter according to claim 2, characterized in that: The industrial pipeline (7) is provided with a mounting pipe (9), and the matching flange (8) is fixedly mounted on the mounting pipe (9).

4. The balanced bar flow meter according to claim 3, characterized in that: 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 via a plurality of fasteners (10).

5. The balanced bar flow meter according to claim 1, characterized in that: A limiting rod (81) is fixedly connected to the upper surface of the matching flange (8), a limiting hole (31) matching the limiting rod (81) is provided on the mounting flange (3), and the limiting rod (81) is plugged into the limiting hole (31) correspondingly.

6. The balanced bar flow meter according to claim 1, characterized in that: The lower surface of the mounting flange (3) is provided with a mounting groove (32), a clamping ring (33) is provided on the top inner wall of the mounting groove (32), a first sealing ring (34) is installed in the mounting groove (32), and a first clamping groove (341) and a second clamping groove (342) are respectively provided at the upper and lower ends of the first sealing ring (34), and the first clamping groove (341) is clamped with the clamping ring (33).

7. The balanced bar flow meter according to claim 6, characterized in that: A second sealing ring (82) is installed inside the upper end of the matching flange (8), a sealing clamp ring (83) is arranged on the second sealing ring (82), and the sealing clamp ring (83) is sealingly clamped with the second clamping groove (342).

8. The balanced bar flow meter according to claim 3, characterized in that: A pressure gauge (13) is fixedly mounted on the outer peripheral surface of the mounting tube (9), and a detection head (102) is connected to the bottom of the pressure gauge (13) via a connecting pipe (101).

9. The balanced bar flow meter according to claim 8, characterized in that: The mounting tube (9) is sleeved with a tightening assembly (11), the tightening assembly (11) comprising an outer sleeve (111) and an inner sleeve (112), the inner sleeve (112) being fixedly sleeved on the mounting tube (9), the outer sleeve (111) being threadedly sleeved on the inner sleeve (112), a sealing sleeve (12) being provided at the bottom of the outer sleeve (111), the sealing sleeve (12) being connected to the connection between the industrial pipeline (7) and the mounting tube (9).

10. The balanced bar flow meter according to claim 9, characterized in that: The inner sleeve (112) and the upper end of the sealing sleeve (12) are respectively provided with a through hole (113) and a wire groove (121); the connecting pipe (101) passes through the through hole (113) and the wire groove (121); and the detection head (102) is arranged inside the sealing sleeve (12).

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