CN206504759U - a flow meter - Google Patents

Abstract

The utility model is related to flow instrument technical field, discloses a kind of flowmeter, to reduce influence of the mechanical oscillation to flowmeter measurements, improves the accuracy of detection of flowmeter, reduces flowmeter cost.The flowmeter of the utility model embodiment includes table body, the through hole connected with inner chamber and with inner chamber；Sensor, is arranged in through hole, including be placed in the induction part of inner chamber and the limiting section that can be limited in outside through hole；Fixture, presses limiting section, and be fixedly connected with table body from a side cover of the limiting section away from table body；Damping means, are arranged between limiting section and table body and limiting section and fixture.

Description

a flow meter

technical field

The utility model relates to the technical field of flow meters, in particular to a flow meter.

Background technique

The vortex flowmeter is a flowmeter that measures fluid volume flow according to the Karman vortex principle. It is mainly used to measure the volume flow of medium fluid in industrial pipelines, such as the volume flow of medium fluid such as gas, liquid and steam. The advantages of vortex flowmeters are: small pressure loss, large measuring range, high precision, and almost not affected by parameters such as fluid density, pressure, temperature, viscosity, etc. when measuring volume flow in working conditions.

The vortex flowmeter measures the flow rate by measuring the vibration of the fluid. Therefore, mechanical vibration is a great enemy of the vortex flowmeter. Slight mechanical vibration will reduce the accuracy of the flowmeter. If the mechanical vibration is heavy, it will The flowmeter cannot work normally.

In addition, other flowmeters that use the principle of fluid oscillation to measure flow, such as swirling flowmeters, also have the above-mentioned technical problems. In the prior art, the flow meter includes a meter body with an inner cavity, a flow sensor installed inside the meter body, and a vibration sensor arranged outside the meter body. Ideally, the flow measured by the flow sensor is the fluid flow rate. However, due to the Mechanical vibration is inevitable. Therefore, there is a certain deviation in the detection value of the flow sensor, and the vibration sensor can detect the mechanical vibration of the equipment. Correct the detection value of the flow sensor according to the detection value of the vibration sensor, and a more accurate fluid flow detection value can be obtained. .

The defect of the existing technology is that the structure of the flowmeter is complex and the cost is high; when the flow sensor and the vibration sensor are located in different environmental media, the sensitivity to the mechanical vibration of the equipment is also different. Therefore, the detection value of the flowmeter still has a certain value. deviation.

Utility model content

The embodiment of the utility model provides a flowmeter to reduce the influence of mechanical vibration on the measurement value of the flowmeter and improve the detection accuracy of the flowmeter.

The flow meter provided by the utility model includes:

The surface body has an inner cavity and a through hole communicating with the inner cavity;

The sensor is installed in the through hole, including a sensing part placed in the inner cavity and a limiting part capable of being limited outside the through hole;

The fixing part covers and presses the limiting part from the side away from the meter body, and is fixedly connected with the meter body;

The damping part is arranged between the limiting part and the watch body, and between the limiting part and the fixing part.

Preferably, the vibration-damping component includes a first vibration-damping portion located between the limiting portion and the watch body, and a second vibration-damping portion located between the limiting portion and the fixing member.

Specifically, the first damping part is a sealing gasket, and the second damping part includes a ring pad part located on the side of the limiting part and a gasket part located on the side of the limiting part away from the watch body.

Optionally, the first damping part and the second damping part are integrally structured.

Specifically, the flow meter further includes a sealing gasket arranged between the first damping portion and the meter body.

Optionally, the damping component is fixed to the limiting part of the sensor.

Optionally, the first damping part is fixed to the watch body, and the second damping part is fixed to the fixing member.

Preferably, the density of the material of the damping component is less than 2.4g/cm ³ .

Optionally, the vibration-damping components include wooden vibration-damping components, aluminum alloy vibration-damping components, magnesium alloy vibration-damping components, organic resin vibration-damping components, and carbon fiber vibration-damping components.

Optionally, the flowmeter includes a vortex flowmeter or a swirl flowmeter.

In the flow meter provided by the utility model, the sensor is fixedly installed on the meter body through the fixing piece, and the sensing part of the sensor is placed in the inner cavity of the meter body through the through hole to detect the flow rate of the medium in the meter body, and the limit part of the sensor The limiter is located outside the through hole, opposite to the fixing part and the meter body, and a vibration damping part is arranged between the limit part and the meter body and between the limit part and the fixing part, that is, the limit part does not directly contact the meter body and the fixing part. The damping component can effectively isolate the signal of mechanical vibration, thereby reducing the influence of mechanical vibration on the measured value of the flowmeter and improving the detection accuracy of the flowmeter. In addition, this solution improves the anti-vibration effect of the flowmeter by adding vibration-damping components, and the solution is simple, low in cost, and high in reliability.

Description of drawings

Fig. 1 is a schematic structural view of a flowmeter in an embodiment of the utility model;

Fig. 2 is a schematic diagram of the structure of the watch body in an embodiment of the utility model;

Fig. 3 is a schematic structural diagram of a sensor in an embodiment of the utility model;

Fig. 4 is a front view of the sensor structure in an embodiment of the utility model;

Fig. 5 is a side view of the sensor structure in an embodiment of the present invention.

Reference signs:

1-table body;

11 - inner cavity;

12-through hole;

2 - sensor;

21 - sensing part;

22-limiting part;

3-Fixer;

4- damping parts;

41 - the first damping part;

42 - the second damping part;

421-ring gasket;

422-gasket part.

detailed description

In order to reduce the influence of mechanical vibration on the measured value of the flowmeter, improve the detection accuracy of the flowmeter, and reduce the cost of the flowmeter, the embodiment of the utility model provides a flowmeter. In order to make the purpose, technical solutions and advantages of the utility model clearer, the following examples are given to further describe the utility model in detail.

Please refer to FIG. 1 and FIG. 2 , the flow meter provided by an embodiment of the present invention includes: a meter body 1 with an inner cavity 11 and a through hole 12 communicating with the inner cavity 11 ;

The sensor 2 is installed in the through hole 12, including a sensing part 21 placed in the inner cavity 11 and a limiting part 22 capable of being limited outside the through hole 12;

The fixing part 3 covers and presses the limiting part 22 from the side of the limiting part 22 away from the meter body 1, and is fixedly connected with the meter body 1;

The damping component 4 is arranged between the limiting portion 22 and the watch body 1 and between the limiting portion 22 and the fixing member 3 .

In the flowmeter provided by the utility model, the sensor 2 is fixedly installed on the meter body 1 through the fixing part 3, and the sensing part 21 of the sensor 2 is placed in the inner cavity 11 of the meter body 1 through the through hole 12, and is used to detect the meter body 1 For the flow rate of the inner medium, the limiting part 22 of the sensor 2 is limited outside the through hole 12, opposite to the fixing part 3 and the meter body 1, and is set between the limiting part 22 and the meter body 1 and between the limiting part 22 and the fixing part 3 There is a damping part 4 , that is, the limiting part 22 does not directly contact the watch body 1 and the fixing part 3 . The damping component 4 can effectively isolate the signal of mechanical vibration, thereby reducing the influence of mechanical vibration on the measured value of the flowmeter and improving the detection accuracy of the flowmeter. In addition, this solution improves the anti-vibration effect of the flowmeter by adding the vibration-damping component 4 , the solution is simple, the cost is low, and the reliability is high.

In a preferred embodiment, the vibration-damping component 4 includes a first vibration-damping portion 41 located between the limiting portion 22 and the watch body 1 and a second vibration-damping portion 42 located between the limiting portion 22 and the fixing member 3 . As shown in FIG. 3 , in a specific embodiment, the first damping part 41 is a sealing gasket, and the second damping part 42 includes a ring pad part 421 located on the side of the limiting part 22 and a ring pad part 421 located away from the limiting part 22 . The gasket part 422 on the body side. The first vibration damping part 41 of the vibration damping part 4 of this scheme can also play the role of sealing in addition to the effect of vibration damping, and the preferred sealing gasket is a flexible graphite gasket, and the material of the second vibration damping part 42 can be compared with The materials of the first damping portion 41 are the same or different.

As shown in FIGS. 4 and 5 , in an optional embodiment, the first damping portion 41 and the second damping portion 42 are integrally formed, that is, the first damping portion 41 and the second damping portion 42 are integrally formed. , is arranged on the outside of the limiting portion 22, this solution can simplify the installation process of the sensor 2.

In a specific embodiment, the flow meter further includes a sealing gasket disposed between the first damping portion 41 and the meter body 1 . That is, if the first damping part 41 does not have the function of sealing, by adding a sealing gasket, the inner cavity 11 of the watch body 1 can be kept sealed.

In an optional embodiment, the shock absorbing part 4 can be a specific part, or fixed to the limit part 22 of the sensor 2, or the first shock absorbing part 41 is fixed to the watch body 1, and the second shock absorbing part 42 is fixed to the Fixture 3. Technicians can choose according to actual production and use requirements. The damping component 4 in the above scheme can isolate the signal of mechanical vibration, thereby reducing the influence of mechanical vibration on the measured value of the flowmeter and improving the detection accuracy of flow.

The material of the damping component 4 needs to have properties such as low density, high temperature resistance, and corrosion resistance. Specifically, a material with a density less than 2.4 g/cm ³ is preferred. The optional damping parts 4 include wood damping parts, aluminum alloy damping parts, magnesium alloy damping parts, organic resin damping parts, carbon fiber damping parts, among them, the best is carbon fiber damping parts, the vibration damping effect Very good, but the cost is higher than that of damping components 4 made of other materials. When the temperature of the medium is high, the flowmeter preferably uses carbon fiber damping components.

The flowmeter in the above scheme can be a vortex flowmeter or a swirling flowmeter. The flowmeter that uses the principle of fluid oscillation to measure flow can use the above scheme to isolate the vibration signal, reduce the impact of mechanical vibration on the flowmeter measurement value, and improve The detection accuracy of the flowmeter.

Apparently, those skilled in the art can make various changes and modifications to the embodiments of the utility model without departing from the spirit and scope of the utility model. In this way, if these modifications and variations of the utility model fall within the scope of the claims of the utility model and equivalent technologies thereof, the utility model is also intended to include these modifications and variations.

Claims (10)

1. a kind of flowmeter, it is characterised in that including：

Table body, the through hole connected with inner chamber and with inner chamber；

Sensor, is arranged in the through hole, including be placed in the induction part of the inner chamber and the limit that can be limited in outside the through hole Position portion；

Fixture, presses the limiting section, and be fixedly connected with table body from a side cover of the limiting section away from table body；

Damping means, are arranged between limiting section and table body and limiting section and fixture.

2. flowmeter as claimed in claim 1, it is characterised in that the damping means include being located between limiting section and table body The first vibration damping portion and the second vibration damping portion between limiting section and fixture.

3. flowmeter as claimed in claim 2, it is characterised in that the first vibration damping portion is gasket seal, the second vibration damping portion Including the ring pad portion positioned at limiting section side and positioned at gasket part of the limiting section away from table body side.

4. flowmeter as claimed in claim 2, it is characterised in that the first vibration damping portion and the second vibration damping portion are integrated knot Structure.

5. flowmeter as claimed in claim 4, it is characterised in that also close between the first vibration damping portion and table body including being arranged at Gasket.

6. flowmeter as claimed in claim 1, it is characterised in that the damping means are fixed on the limiting section of sensor.

7. flowmeter as claimed in claim 2, it is characterised in that the table body, described are fixed in the first vibration damping portion The fixture is fixed in two vibration damping portions.

8. flowmeter as claimed in claim 1, it is characterised in that the density of the damping means material is less than 2.4g/cm³。

9. flowmeter as claimed in claim 1, it is characterised in that the damping means include wooden damping means, aluminium alloy Damping means, magnesium alloy damping means, organic resin damping means, carbon fiber damping means.

10. the flowmeter as described in any one of claim 1~9, it is characterised in that flowmeter includes vortex-shedding meter or rotation Enter flowmeter.