Flow online verification intervention tool based on standard meter method

Abstract

The utility model relates to a flow on-line verification intervention tool based on a standard meter method, an applicable standard flow meter comprises a meter head, a smooth shell, a threaded shell arranged at the lower position of the smooth shell in a sleeved mode and a probe located at a through opening of the threaded shell, and the flow on-line verification intervention tool comprises a connecting piece and a valve body. The valve body is in a T shape and comprises a valve body main pipeline, a valve body branch pipeline used for being connected with a standard flowmeter and a valve element arranged at the intersection of the valve body main pipeline and the valve body branch pipeline, the valve element is used for being communicated with or stopping the valve body branch pipeline, the connecting piece is connected with one end of the valve body main pipeline, and the valve element is a V-shaped ball valve. The inner wall of the valve body branch pipeline is provided with an internal thread meshed with a threaded shell of the standard flow meter, and the standard flow meter is fixed in the valve body branch pipeline through a fixed installation assembly. The fixed installation assembly comprises a fixing piece, an adjusting piece and a plug pin.

Description

Technical Field

[0001] The utility model relates to instrument installation technology and automation component design, in particular to a three-way ball valve, specifically a flow online calibration intervention tool based on a standard meter method. Background Art

[0002] The traditional method for instrument calibration involves disassembly and inspection. This involves shutting down the pipeline, removing the instrument, and sending it to a specialized facility for calibration. This method is time-consuming and labor-intensive, disrupting the normal operations of gas users. Furthermore, reinstalling the instrument inevitably introduces potential risks, such as leaks at connections and probe damage. Utility Model Content

[0003] In response to the shortcomings of the existing technology, this utility model provides a flow online calibration intervention tool based on the standard meter method to solve the problems existing in the existing technology: long inspection cycle, impact on the normal operation of the pipeline system of the inspection unit, and potential risks easily introduced by reinstalling the instrument. To solve the above problems, this utility model is achieved through the following technical solutions:

[0004] A flow online calibration intervention tool based on the standard meter method, the applicable standard flow meter includes a meter head, a smooth shell, a threaded shell 16 sleeved on the lower position of the smooth shell and a probe located at the through opening of the threaded shell 16, the flow online calibration intervention tool includes a connector 4 and a valve body 3; it is characterized in that the valve body 3 is T-shaped, including a valve body main pipe 31, a valve body branch pipe 32 for connecting the standard flow meter and a valve core 2 arranged at the intersection of the valve body main pipe 31 and the valve body branch pipe 21, the valve core 2 is used to connect or cut off the valve body branch pipe 32, the connector 4 is connected to one end of the valve body main pipe 31, and the valve core 2 is a V-type ball valve; the inner wall of the valve body branch pipe 32 is provided with The internal thread engages with the threaded shell 16 of the standard flowmeter, and the standard flowmeter is fixed in the valve body branch pipe 32 through a fixed installation assembly; the fixed installation assembly includes a fixing part 14, an adjusting part 21 and a pin 11; the fixing part 14 is provided with a fixing part pin hole 151 and a mounting port 20, and the mounting port 20 fits with the smooth shell of the standard flowmeter; the adjusting part 21 is a flange with a locking screw 24, on which is provided an adjusting part pin hole 152 corresponding to the fixing part pin hole 151, and the adjusting part is connected to the fixing part through the pin 11; the tightness of the adjusting part and the smooth shell of the flowmeter is adjusted by the locking screw 22, thereby adjusting the inlet depth of the standard flowmeter into the pipeline.

[0005] Furthermore, the smooth housing is a smooth housing with scale lines, and the scale lines are used to represent the inlet pipe depth of the standard flow meter.

[0006] Furthermore, the standard flow meter is a thermal mass flow meter, which includes two probes: a flow probe and a temperature probe.

[0007] The present utility model has the following beneficial effects: the valve core uses a V-type ball valve, which can not only realize the rapid opening and closing of the pipeline and reduce the impact on the operation of the pipeline, but also the ball valve has extremely small flow resistance and good sealing, which has little impact on the measurement of the flow meter and can ensure the measurement accuracy of the flow meter. The flow meter is nested with a threaded shell that matches the channel threaded sleeve, which not only ensures the airtightness between the flow meter and the channel, but also can adjust the depth and orientation of the flow meter probe in the pipeline by rotating the threaded shell to ensure that the flow meter is in the ideal measurement position. At the same time, the flow meter fixtures and latches at the outlet end of the channel are used to ensure the stability of the flow meter installation and avoid the influence of airflow disturbance on flow measurement. In addition, the connector design of the intervention tooling makes the intervention tooling have the advantages of easy installation, easy blowing and cleaning, and adaptable to pipes of various diameters. Widely distributed wave springs and sealing gaskets provide protection for the overall airtightness of the intervention tooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The following will describe in detail the implementation mode, relevant details and working principle of the present invention in conjunction with the accompanying drawings.

[0009] Figure 1 This is a full cross-sectional view of the intervention tooling described in the present invention.

[0010] Figure 2 This is a full cross-sectional view of the valve body of the present invention from the left.

[0011] Figure 3 This is a partial cross-sectional view of the main view of the valve body of the present invention.

[0012] Figure 4 This is a schematic structural diagram of the thermal mass flowmeter described in the present utility model.

[0013] Figure 5 This is a schematic diagram of the valve core structure of the utility model.

[0014] Figure 6 This is a schematic structural diagram of the fixing member of the present invention.

[0015] Figure 7 This is a structural diagram of the adjusting member of the present invention.

[0016] Figure 8 The following is a schematic diagram of the working principle of the intervention tool of the present invention: Figure a is the initial state diagram, Figure b is the bypass opening diagram, and Figure c is the bypass closing diagram.

[0017] In the figure: 1 bearing, 2 valve core, 3 valve body, 4 connecting part, 5 fixing bolt, 6 valve cover, 7 handle, 8 valve stem, 9 valve stem limiter, 10 standard flowmeter, 11 pin, 12 fixing bolt, 13 sealing ring, 14 fixing part, 151 fixing part pin hole, 152 adjusting part pin hole, 16 threaded housing, 17 temperature probe, 18 flow probe, 19 fixing hole, 20 mounting port, 21 adjusting part, 22 locking screw, 23 scale line, 24 probe direction mark, 25 upstream pipeline stop valve, 26 intervention tooling, 27 downstream pipeline stop valve, 28 flowmeter to be measured, 29 bypass stop valve. DETAILED DESCRIPTION

[0018] The following embodiments are only used to more clearly illustrate the technical solutions and implementation ideas of the present invention. They are only used as examples and are not intended to limit the scope of protection of the present invention.

[0019] In actual application, the assembly of parts provided in the case of this utility model can be completed by industry insiders. The connection and operation sequence involved should follow the following working principle. The specific operation technology can refer to the relevant technical specifications. The following content only involves the implementation method and working principle of this utility model.

[0020] It should be noted that in the description of the embodiments of the present invention, the directional words or subordinate words such as "left and right" and "main branch" are based on the positions and subordinate relationships shown in the drawings, and do not indicate or imply that the specified components must have a specific orientation or a specific structure, and cannot be understood as a limitation on the present invention.

[0021] The present invention proposes an intervention tool for on-line flow calibration based on the standard meter method, which uses a specific three-way V-shaped ball valve as the main component of the intervention tool, which contains a corresponding main inlet and outlet channel and a branch outlet channel, and uses the sealing surface and V-shaped cut of the ball valve to realize rapid opening and closing between channels: Under normal circumstances, the sealing spherical surface of the ball valve is placed in the branch outlet channel to make it in a cut-off state. At this time, the valve body channel is connected with the upstream and downstream sections of the main pipeline. The intervention tool described in the present invention is equivalent to an ordinary flange pipe fitting on the main pipeline, which only serves the connection and transportation functions; when the instrument to be tested needs to be calibrated, the intervention tool can be made independent of the main pipeline by adjusting the opening and closing conditions of the upstream, downstream and bypass. At this time, the sealing spherical surface of the ball valve is rotated on the bottom of the valve body, and the standard flow meter is installed in the main pipeline through the channel of the intervention tool, and then the upstream and downstream valves are opened to realize the flow measurement and calibration functions. Compared with the original instrument calibration method, the method provided by the utility model is not only easy to operate, saves time and effort, but also avoids the redundancy of setting up spare pipelines and devices, saves operating costs, and reduces the probability of failures such as pipeline leakage after reinstalling the instrument, thus better solving the existing problems in the in-situ measurement of the instrument.

[0022] Reference Attachment Figure 1 The intervention tooling proposed in this utility model mainly consists of a connector 4 and a valve body 3. The valve body 3 is T-shaped and includes a valve body main pipe 31, a valve body branch pipe 32 for connecting to a standard flowmeter, and a valve core 2 located at the intersection of the valve body main pipe 31 and the valve body branch pipe 32. The valve core is used to connect or shut off the valve body branch pipe. The connector 4 is a straight-end pipe fitting with a flange, and the valve body 3 is a three-way pipe fitting with a flange. The two pipes can be assembled and connected to other pipe fittings through the holes on the flange and the corresponding type of fixing bolts 5. The intervention tooling has a medium inflow channel A and two medium outflow channels B and C. A V-shaped ball valve core 2 is provided in the center of the valve body 3 to realize the opening and closing function between channel B and channel AC. Channel B is the installation channel for the standard flowmeter. The connector 4 and the pipe in front of the valve core of the valve body main pipe together form the medium inflow channel A. The pipe behind the valve core of the valve body main pipe serves as the medium outflow channel C, and the valve body branch pipe serves as the medium outflow channel B.

[0023] The connector 4 and the valve body 3 are easy to install and remove, which is convenient for purging the pipeline during regular maintenance. The flange plates on the air inlet end of the connector 4 are of different models, so that the intervention tooling can adapt to flow measurement under various pipeline diameters.

[0024] Reference Attachment Figure 2 , at this time, the intervention tooling channel is in a connected state. The V-shaped valve core 2 is installed horizontally in the center of the valve body 3, and bearings 1 are installed on the top and bottom of the valve core. The valve core is fixed and driven by the valve cover 6 and the valve stem 8. When channel B needs to be closed, just turn the handle 9 180° clockwise as shown in the figure to achieve quick shutoff. In order to ensure that the sealing surface of the ball valve can accurately fit the inlet end of channel B, a valve stem limiter 9 is provided on the valve cover to limit the rotation range of the valve core to avoid leakage of the medium due to excessive rotation angle or wrong direction of the valve core.

[0025] Reference Attachment Figure 3 When pipeline B is connected, the standard flowmeter 10 nested with the threaded housing 16 is securely and tightly mounted on the intervention tooling channel B through the fixing components such as the fixing part 14, the adjusting part 21, the locking screw 22, the latch 11, the latch holes 151 and 152. The adjusting part 21 is mainly used to adjust the depth of entry of the standard flowmeter probe into the pipe. It can move up and down and is fixed to the smooth outer shell at the upper end of the threaded housing of the flowmeter by the locking screw 22. At the same time, the adjusting part can be fixed to the fixing part 14 by the latch hole 152 thereon and the matching latch 11, making it maneuverable and stable at the same time. The fixing part 14 fits in with the outlet end of the valve body channel B, and is fixed to the channel B with the flowmeter as a whole by the fixing bolt 12 to ensure the tightness of the flowmeter installation.

[0026] Reference Attachment Figure 4The standard flowmeter 10 is a thermal mass flowmeter, which is characterized by being suitable for flow measurement of gas and liquid media in a wide range, and is especially suitable for various medium and low pressure gases with high cleanliness. Therefore, this intervention tooling is mainly suitable for the calibration of flowmeters for gas media, especially the calibration of gas source flowmeters in compressed air stations. The thermal mass flowmeter is divided from top to bottom into four parts: a meter head, a smooth shell with scale lines, a threaded shell and a probe. There is a through opening at the bottom of the threaded shell 16, which contains a flow probe 18 and a temperature probe 17. In order to ensure that the direction and depth of the probe are at the ideal measuring position, a probe direction mark 24 is affixed to the flowmeter head to indicate the direction of the flowmeter probe. During installation, ensure that the direction of the arrow indicated by the probe direction mark is consistent with the direction of the airflow. Since the length of the threaded shell and the probe is consistent with the length of the threaded pipe sleeve of the valve body, the scale line 23 on the smooth shell can represent the current depth of the probe into the pipe. When the depth of the probe entering the pipe needs to be adjusted, estimate the required depth, remove the pin 11 on the adjusting part, loosen the locking screw 22, move the adjusting part 21 to the corresponding scale line and ensure that its upper end coincides with the scale line, tighten the locking screw again and adjust the depth of the probe entering the pipe by rotating the threaded housing until the adjusting part coincides with the fixing part. At this time, reinstall the pin to complete the adjustment of the probe's depth of entry into the pipe.

[0027] Reference Attachment Figure 5 The valve core 2 is a V-shaped ball valve with a through V-shaped cutout for connecting channel B and a spherical closing surface for cutting off channel B. Bearings 1 are installed on its top and bottom, so it has the ability to rotate quickly.

[0028] Reference Attachment Figure 6 The fixing part 14 is located at the upper part of the outlet end of channel B and is divided into two symmetrical parts, which can realize the rapid fixing and disassembly of the flow meter and channel B. Figure 6 Taking the left half of the fixture as an example, from left to right, there are fixing holes 19, latch holes 151, and mounting openings 20. The fixing holes are used to screw in fixing bolts 12 to ensure the stability of the connection between the flowmeter and channel B. Latch holes 151 are used to secure the connection between the adjustment member 21 and the fixture 14. The mounting opening 20 is formed by combining the left and right fixtures and fits snugly into the smooth outer shell of a standard flowmeter.

[0029] Reference Attachment Figure 7 The adjusting member 21 is a flange with a locking screw 22. The pin hole 152 on the flange is aligned with the pin hole on the fixing member, and the adjusting member can be connected to the fixing member by a pin. The locking screw 22 can be used to adjust the tightness between the adjusting member and the flow meter housing, making it easy to adjust it up and down to reach the appropriate scale.

[0030] Reference Attachment Figure 8 The three figures show the installation position specification and operation details of the intervention tooling proposed by the present invention, with the airflow flowing from left to right as the positive direction. Figure 1 As shown in the thumbnail of the intervention tooling, since the handle is oriented at a 180° angle to the opening direction of the ball valve, the direction of the handle 7 can be used to determine the open and closed status of pipes A, B, and C. To ensure a stable flow rate of the medium, the valve installation should follow certain long straight pipe setting specifications. Figure 8 -a, the upstream pipeline stop valve 25 of the intervention tooling should be set at a position at least 20 times the nominal diameter away from the inlet end of the intervention tooling and be in the open state; the downstream pipeline stop valve 27 of the intervention tooling should be set at a position at least 5 times the nominal diameter away from the outlet end of the intervention tooling and be in the open state; the bypass stop valve 29 is in the closed state, and the channel B of the intervention tooling is in the cut-off state. At this time, the medium flows into the intervention tooling from the upstream through channel A and flows out from channel C to the flow meter 28 to be measured and the downstream pipeline. Therefore, the intervention tooling as a whole can be regarded as a flange component on the main pipeline, which is only used to transmit gas in the pipe.

[0031] Figure 8 -b represents the open and closed status of each stop valve when the intervention fixture is independent of the main pipeline. At this point, the upstream pipeline stop valve is closed, the downstream pipeline stop valve is closed, and the bypass stop valve is open. The medium flows through the bypass through the flowmeter to be measured and downstream, without passing through the intervention fixture. Therefore, the intervention fixture can be considered independent of the main pipeline. This state is used for installing a standard flowmeter 10.

[0032] Figure 8 -c represents the open and closed status of each stop valve after standard flowmeter 10 is connected to the intervention tooling channel. At this point, the upstream pipeline stop valve is open again, the downstream pipeline stop valve is open again, and the bypass stop valve is closed again. The medium continues to flow into the intervention tooling through channel A. After flowing through standard flowmeter probes 17 and 18, the standard value of the medium's current flow rate can be measured, which is used to guide the calibration of the flowmeter under test 28. Finally, the medium flows through channel B to the downstream pipeline, achieving normal gas transportation.

[0033] After completing the calibration of the flow meter to be tested, the intervention tooling is restored to its original state by opening and closing the stop valves. Figure 8 -a status, and remove the standard flow meter to complete this measurement work.

Claims

1. A flow online verification intervention tool based on a standard meter method, wherein the applicable standard flow meter comprises a meter head, a smooth housing, a threaded housing (16) sleeved on the lower part of the smooth housing, and a probe located at a through opening of the threaded housing (16), wherein the flow online verification intervention tool comprises a connector (4) and a valve body (3); characterized in that: The valve body (3) is T-shaped, comprising a valve body main pipeline (31), a valve body branch pipeline (32) for connecting to a standard flow meter, and a valve core (2) arranged at the intersection of the valve body main pipeline (31) and the valve body branch pipeline (32), the valve core (2) being used to connect or cut off the valve body branch pipeline (32), the connecting piece (4) being connected to one end of the valve body main pipeline (31), the valve core (2) being a V-shaped ball valve; the inner wall of the valve body branch pipeline (32) is provided with an internal thread engaged with a threaded shell (16) of the standard flow meter, the standard flow meter being fixed in the valve body branch pipeline (32) by a fixed installation component; the fixed installation component The assembly comprises a fixing member (14), an adjusting member (21) and a latch (11); the fixing member (14) is provided with a fixing member latch hole (151) and a mounting opening (20), and the mounting opening (20) is matched with a smooth outer shell of a standard flow meter; the adjusting member (21) is a flange with a locking screw (22), and is provided with an adjusting member latch hole (152) corresponding to the fixing member latch hole (151), and the adjusting member is connected to the fixing member through the latch (11); the tightness between the adjusting member and the smooth outer shell of the flow meter is adjusted through the locking screw (22), thereby adjusting the inlet depth of the standard flow meter into the pipeline.

2. The flow online verification intervention tool according to claim 1 is characterized in that: The smooth housing is a smooth housing with scale lines, and the scale lines are used to represent the inlet pipe depth of the standard flow meter.

3. The flow online verification intervention tool according to claim 1 is characterized in that: The standard flow meter is a thermal mass flow meter, which consists of two probes: a flow probe and a temperature probe.

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