CN-224202505-U - Uniform speed pipe flowmeter

Abstract

The utility model relates to a uniform velocity tube flowmeter which comprises a mounting seat, a detection rod, a pressure taking pipeline, a three-valve group and a differential pressure transmitter module, wherein the mounting seat is used for being connected with a pipeline, a positive pressure cavity and a negative pressure cavity are arranged in the detection rod, a positive pressure taking port and a negative pressure taking port are correspondingly formed in the detection rod, the pressure taking pipeline is communicated with the positive pressure cavity and the negative pressure cavity, the three-valve group and the differential pressure transmitter module comprise the three-valve group and the differential pressure transmitter, and the three-valve group is used for communicating/disconnecting the pressure taking pipeline with the differential pressure transmitter. The detection rod is internally provided with a positive pressure cavity and a negative pressure cavity, and is provided with a corresponding pressure taking port, and the detection rod, the three valve groups and the differential pressure transmitter module are connected through a pressure taking pipeline, so that the flow measurement of fluid in the pipeline is realized. The detection rod does not need an additional welding area, the installation bottleneck of the small-caliber pipeline caused by insufficient space is broken through, the uniform speed pipe flowmeter can be suitable for a flow measurement scene of the small-caliber pipeline, and the application range of the flowmeter is expanded.

Inventors

• KANG XIANQIANG
• LIU ZHENFU
• Wen Qigui

Assignees

• 重庆川仪自动化股份有限公司

Dates

Publication Date

20260505

Application Date

20250528

Claims (10)

1. 1. A uniform velocity tube flowmeter, comprising: The mounting seat is used for being connected with the pipeline; The detection rod is connected with the mounting seat, extends into the pipeline, is internally provided with a positive pressure cavity and a negative pressure cavity, and is provided with a positive pressure taking port communicated with the positive pressure cavity and a negative pressure taking port communicated with the negative pressure cavity; The pressure taking pipeline comprises a positive pressure taking pipe and a negative pressure taking pipe, the positive pressure taking pipe is communicated with the positive pressure cavity, and the negative pressure taking pipe is communicated with the negative pressure cavity; The three-valve group comprises a positive pressure valve, a negative pressure valve and a balance valve, wherein the positive pressure valve is used for connecting/disconnecting the positive pressure taking pipe with a positive pressure chamber of the differential pressure transmitter, the negative pressure valve is used for connecting/disconnecting the negative pressure taking pipe with a negative pressure chamber of the differential pressure transmitter, and the balance valve is used for balancing the pressure of the positive pressure chamber and the negative pressure chamber of the differential pressure transmitter.
2. 2. The uniform velocity tube flowmeter according to claim 1, wherein the mating surface of said mounting base and said conduit is an arcuate surface.
3. 3. The uniform velocity tube flowmeter of claim 1, wherein the detection rod comprises a detection part and a connection part, the detection part is positioned in the pipeline, the connection part is used for being connected with the mounting seat, and the positive pressure taking port and the negative pressure taking port are both arranged on the detection part.
4. 4. The uniform velocity tube flowmeter according to claim 3, wherein the connecting portion is symmetrically provided with a first sinking groove and a second sinking groove, wherein the first sinking groove is used for installing the positive pressure taking pipe, and the second sinking groove is used for installing the negative pressure taking pipe.
5. 5. The uniform velocity tube flowmeter according to claim 4, wherein the connecting portion is provided with a first branch and a second branch, the first branch is used for communicating the positive pressure cavity with the positive pressure taking tube, and the second branch is used for communicating the negative pressure cavity with the negative pressure taking tube.
6. 6. The uniform velocity tube flowmeter according to claim 1, further comprising an adapter connected between the pressure taking pipe, the three-valve set and the differential pressure transmitter module, wherein a third branch and a fourth branch are arranged in the adapter, the third branch is used for communicating the positive pressure taking pipe and the positive pressure valve, and the fourth branch is used for communicating the negative pressure taking pipe and the negative pressure valve.
7. 7. The uniform velocity tube flowmeter according to claim 6, further comprising a support tube connected between said adapter and said pressure take-off line, said support tube supporting said adapter and communicating said pressure take-off line with said adapter.
8. 8. The uniform velocity tube flowmeter according to claim 3, wherein said mounting base is provided with a through hole, said pipe is provided with a through hole corresponding to said through hole, and said detecting portion extends into said pipe through said through hole.
9. 9. The uniform velocity tube flowmeter according to claim 8, wherein said mounting base is provided with a seal groove surrounding said through hole, said seal groove is used for mounting a seal ring, said connecting portion is provided with an abutting portion, and said abutting portion is matched with said seal groove in shape.
10. 10. The uniform velocity tube flowmeter according to claim 3, wherein the mounting base is provided with a plurality of threaded holes, the connecting portion is provided with a through hole corresponding to the threaded holes, and the through hole is used for penetrating through the locking piece and being in threaded connection with the threaded holes.

Description

Uniform speed pipe flowmeter Technical Field The utility model relates to the technical field of flow measurement, in particular to a uniform velocity tube flowmeter. Background At present, the existing uniform velocity tube flowmeter is generally composed of a mounting seat, a flange above the mounting seat, a detection probe, a pressure taking tube and a stop valve, wherein the stop valve is connected with a three-valve group and a differential pressure transmitter after the stop valve comes out, and then the uniform velocity tube flowmeter for flow measurement is formed. But this conventional structure is not suitable for flow measurement of small-bore pipes. However, the existing detection probes are usually welded with the capillary tube and the flange above the mounting seat to form positive and negative pressure isolation. When the method is applied to flow measurement of a small-caliber pipeline, the corresponding welding area cannot be reserved because the detection probe of the small-caliber uniform-speed pipe flowmeter is small, and meanwhile, the distribution of pressure sampling holes on the detection probe cannot be designed according to the conventional quantity and distribution. Therefore, for the flow measurement of the small-caliber pipeline, the corresponding detection probe structure needs to be redesigned, so that the flow measurement application of the uniform velocity tube flowmeter on the small-caliber pipeline is realized. Disclosure of utility model In view of the above-mentioned drawbacks of the prior art, an object of the present utility model is to provide a uniform velocity tube flowmeter, which is used for solving the problem that the existing uniform velocity tube flowmeter detecting probe cannot adapt to the flow measurement of a small-caliber pipeline. To achieve the above and other related objects, the present utility model provides a uniform velocity tube flowmeter comprising: The mounting seat is used for being connected with the pipeline; The detection rod is connected with the mounting seat, extends into the pipeline, is internally provided with a positive pressure cavity and a negative pressure cavity, and is provided with a positive pressure taking port communicated with the positive pressure cavity and a negative pressure taking port communicated with the negative pressure cavity; The pressure taking pipeline comprises a positive pressure taking pipe and a negative pressure taking pipe, the positive pressure taking pipe is communicated with the positive pressure cavity, and the negative pressure taking pipe is communicated with the negative pressure cavity; The three-valve group comprises a positive pressure valve, a negative pressure valve and a balance valve, wherein the positive pressure valve is used for connecting/disconnecting the positive pressure taking pipe with a positive pressure chamber of the differential pressure transmitter, the negative pressure valve is used for connecting/disconnecting the negative pressure taking pipe with a negative pressure chamber of the differential pressure transmitter, and the balance valve is used for balancing the pressure of the positive pressure chamber and the negative pressure chamber of the differential pressure transmitter. Optionally, the matching surface of the mounting seat and the pipeline is an arc-shaped surface. Optionally, the measuring rod includes detection portion and connecting portion, detection portion is located in the pipeline, connecting portion be used for with the mount pad is connected, the malleation is got the pressure mouth the negative pressure is got the pressure mouth all and is seted up on the detection portion. Optionally, the connecting portion is symmetrically provided with a first sinking groove and a second sinking groove, the first sinking groove is used for installing the positive pressure taking pipe, and the second sinking groove is used for installing the negative pressure taking pipe. Optionally, the connecting portion is provided with a first branch and a second branch, the first branch is used for communicating the positive pressure cavity and the positive pressure taking pipe, and the second branch is used for communicating the negative pressure cavity and the negative pressure taking pipe. Optionally, the device further comprises an adapter, wherein the adapter is connected between the pressure taking pipeline, the three-valve group and the differential pressure transmitter module, a third branch and a fourth branch are arranged in the adapter, the third branch is used for communicating the positive pressure taking pipe with the positive pressure valve, and the fourth branch is used for communicating the negative pressure taking pipe with the negative pressure valve. Optionally, the pressure-taking device further comprises a support tube, wherein the support tube is connected between the adapter and the pressure-taking pipeline, and is used for supporting the adapter and comm