Integrated turbine flowmeter

Abstract

The utility model discloses an integrated turbine flowmeter which comprises a shell and a measuring core assembly arranged in the shell, the measuring core assembly comprises a main shaft, magnets evenly distributed in the circumferential direction of the main shaft are arranged on the main shaft, and a gas volume metering corrector is arranged on the shell. And the high-frequency sensor is arranged opposite to the rotating surface of the magnet in the circumferential direction and is connected with a gas volume metering corrector. By adopting the above scheme, the overall structure is simplified, the cost is reduced, the processing and assembling difficulty is reduced, and compared with the traditional structure, the calibration test efficiency and accuracy can be relatively improved, and the assembling and later dismounting service is facilitated.

Description

Technical Field

[0001] The utility model belongs to the field of gas flow meters, and in particular relates to an integrated turbine flow meter. Background Art

[0002] Gas turbine flowmeter is a velocity instrument with the advantages of high precision and high repeatability. Its simple overall structure and wide range ratio make it widely used in long-distance gas transmission pipelines. It is mostly used for metering in pipeline networks. In urban gas transmission networks, it is also mainly used in large-flow main pipelines such as pressure regulating stations, which require long-term operation. Therefore, the accuracy of the flowmeter is particularly important.

[0003] Traditional mechanical turbine flowmeters, such as the one applied for earlier by the applicant, with patent number "201620989947.4" and the name "Metering Chamber Assembly of Turbine Gas Meter", mainly use gear transmission and mechanical counters, which are difficult and costly to process, and the assembly structure is relatively complex. On the other hand, the use of mechanical counters relatively reduces the measurement accuracy. Utility Model Content

[0004] In view of this, the utility model provides an integrated turbine flowmeter to solve the problems in the prior art, such as the complex transmission and counting structure of the turbine flowmeter, the difficulty in processing and assembly, the high production cost, and the poor measurement accuracy.

[0005] The technical solution is as follows:

[0006] An integrated turbine flowmeter includes a shell and a measuring core assembly arranged in the shell. The key point is that the measuring core assembly includes a main shaft, the main shaft has magnets evenly distributed along its circumference, the shell is provided with a gas volume measurement corrector, and has a high-frequency sensor arranged circumferentially opposite to the rotating surface of the magnet, and the high-frequency sensor is connected to the gas volume measurement corrector.

[0007] The above scheme uses high-frequency magnetic signals for measurement, which can greatly improve the calibration test efficiency and measurement accuracy of the flow meter compared to traditional mechanical counters, while further reducing the difficulty and cost of processing and assembly, and making the internal structure simpler.

[0008] Preferably, the measuring core assembly further comprises a disc-shaped bearing seat, the bearing seat is detachably mounted on the main shaft, and the magnet is detachably mounted on the bearing seat. The above scheme is adopted to facilitate quick installation in the early stage and quick replacement of all magnets as needed in the later stage.

[0009] As a preferred embodiment, the bearing seat cooperates with the spindle key, and a tightening step and a locking nut are respectively provided on both axial sides of the spindle corresponding to the bearing seat. The above scheme is conducive to improving the disassembly and assembly efficiency of the bearing seat and the installation stability of the bearing seat.

[0010] As a preferred embodiment, the screwing direction of the locking nut is opposite to the working rotation direction of the main shaft. The above solution can prevent the locking nut from loosening during the working process of the main shaft, thereby improving the installation reliability.

[0011] Preferably, the bearing seat has a countersunk hole for installing the magnet, the bearing seat is composed of two left and right sub-seats, and the countersunk hole is formed by the grooves opened on the sub-seats. The above solution is adopted to facilitate the installation and subsequent rapid replacement of the magnet.

[0012] Preferably, the housing is also provided with a pressure sensor and a temperature sensor, both of which are connected to the gas volume measurement corrector and extend into the housing cavity. By adopting the above scheme, the correction of temperature and pressure can be achieved and the measurement accuracy can be improved.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The integrated turbine flowmeter provided by the utility model simplifies the overall structure, reduces costs, and reduces the difficulty of processing and assembly. Compared with traditional structures, it can relatively improve the efficiency and accuracy of calibration testing and facilitate assembly and later disassembly services. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 for Figure 1 Radial section view;

[0017] Figure 3 for Figure 1 Axial section view;

[0018] Figure 4 This is a schematic diagram of the magnet installation structure;

[0019] Figure 5 for Figure 4 Sectional view;

[0020] Figure 6 This is a cross-sectional view of the bearing seat. DETAILED DESCRIPTION

[0021] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0022] refer to Figures 1 to 6The integrated turbine flowmeter shown mainly includes a shell 1 and a measuring core assembly 2 arranged in the shell 1. The measuring core assembly 2 includes a main shaft 20. Usually, an impeller is installed on the main shaft 20. The main shaft 20 has magnets 21 evenly distributed along its circumference. A gas volume metering corrector 3 is provided on the shell 1, and a high-frequency sensor 4 is arranged circumferentially opposite to the rotating surface of the magnet 21. The high-frequency sensor 4 is connected to the gas volume metering corrector 3. During the operation of the flowmeter, gas enters from one end of the shell 1, drives the impeller to rotate, and the rotating shaft 20 rotates synchronously. The high-frequency sensor 4 detects the magnetic field of the magnet 21, thereby converting the rotation speed of the main shaft 20 into a high-frequency signal and transmitting it to the gas volume metering corrector 3. The gas volume metering corrector 3 can quickly obtain the flow parameters.

[0023] In the specific implementation process, the measuring core assembly 2 also includes a disc-shaped bearing seat 22, which is detachably mounted on the main shaft 20, and the magnet 21 is detachably mounted on the bearing seat 22. Specifically, the bearing seat 22 is key-matched with the main shaft 20, and the main shaft 20 is provided with a tightening step 200 and a locking nut 23 on both axial sides corresponding to the bearing seat 22. When installing, the bearing seat 22 is mainly installed against the tightening step 200 by the locking nut 23.

[0024] In this embodiment, the screwing direction of the locking nut 23 is opposite to the working rotation direction of the main shaft 20. In this way, during the rotation of the main shaft 20, the locking nut 23 is just subjected to the force in the screwing direction, which can fully prevent the locking nut 23 from loosening.

[0025] The bearing seat 22 has a countersunk hole 220 for mounting the magnet 21 , and the magnet 21 is embedded in the countersunk hole 220 . Specifically, the bearing seat 22 is composed of two symmetrical sub-seats 221 on the left and right, and the countersunk hole 220 is formed by the grooves opened on the sub-seats 221 .

[0026] The pressure sensor 5 and the temperature sensor 6 on the shell 1 of the present application are both connected to the gas volume metering corrector 3 and extend into the inner cavity of the shell 1, so that timely correction of temperature and pressure can be achieved and accuracy can be further improved. The standard waterproof aviation plug of the external power valve on the right side of the gas volume metering corrector 3 can realize quick connection between the external power and the valve.

[0027] It should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make various similar expressions without violating the purpose and claims of the present invention, and such changes all fall within the protection scope of the present invention.

Claims

1. An integrated turbine flowmeter, comprising a housing (1), and a measuring core assembly (2) disposed in the housing (1), characterized in that: The measuring core assembly (2) comprises a main shaft (20) having magnets (21) uniformly distributed along its circumference. The housing (1) is provided with a gas volume measurement corrector (3) and a high-frequency sensor (4) arranged circumferentially opposite to a rotating surface of the magnets (21). The high-frequency sensor (4) is connected to the gas volume measurement corrector (3).

2. The integrated turbine flowmeter according to claim 1, characterized in that: The measuring core assembly (2) further comprises a disc-shaped bearing seat (22), wherein the bearing seat (22) is detachably mounted on the main shaft (20), and the magnet (21) is detachably mounted on the bearing seat (22).

3. The integrated turbine flowmeter according to claim 2, characterized in that: The bearing seat (22) is key-matched with the main shaft (20), and a tightening step (200) and a locking nut (23) are respectively provided on two axial sides of the main shaft (20) corresponding to the bearing seat (22).

4. The integrated turbine flowmeter according to claim 3, characterized in that: The screwing direction of the locking nut (23) is opposite to the working rotation direction of the main shaft (20).

5. The integrated turbine flowmeter according to any one of claims 2 to 4, characterized in that: The bearing seat (22) has a countersunk hole (220) for mounting the magnet (21); the bearing seat (22) is composed of two left and right sub-seats (221); and the countersunk hole (220) is formed by enclosing notches opened on the sub-seats (221).

6. The integrated turbine flowmeter according to claim 1, characterized in that: The housing (1) is also provided with a pressure sensor (5) and a temperature sensor (6); the pressure sensor (5) and the temperature sensor (6) are both connected to the gas volume measurement corrector (3) and extend into the inner cavity of the housing (1).

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