Sensor for vortex shedding flowmeter

Abstract

The utility model provides a sensor for a vortex shedding flowmeter, and belongs to the technical field of flow detection, the sensor comprises a measuring tube and signal sensors, the signal sensors are arranged in the measuring tube, the sensor is characterized by further comprising an anti-seismic mechanism, the anti-seismic mechanism comprises an anti-seismic sensor and a coupler, the anti-seismic sensor is arranged outside the measuring tube, and the coupler is arranged outside the measuring tube. The anti-seismic sensor and the signal sensor are oppositely arranged, the anti-seismic sensor and the signal sensor are both electrically connected with the coupler, and the coupler couples output signals of the anti-seismic sensor and the signal sensor; fluid passes through the measuring tube, and the signal sensor is used for measuring a flow signal generated when the fluid passes through; when vibration is generated, the anti-seismic sensor and the signal sensor generate signals with the same intensity and opposite polarities due to vibration, the coupler couples the output signals of the anti-seismic sensor and the signal sensor, the signals generated by the anti-seismic sensor and the signal sensor due to vibration offset each other, and it is guaranteed that the signal sensor outputs stable and accurate flow signals. And a stable anti-seismic effect is achieved.

Description

Technical Field

[0001] This application belongs to the technical field of flow detection, and more specifically, relates to a sensor for a vortex flow meter. Background Technology

[0002] Vortex flow meter sensors are developed and manufactured based on the Karman vortex street principle to measure the volumetric flow rate, standard volumetric flow rate, or mass flow rate of gases, steam, or liquids. Vortex flow meter sensors are characterized by low pressure loss, a wide measuring range, and high accuracy. When measuring volumetric flow rate under operating conditions, they are virtually unaffected by parameters such as fluid density, pressure, temperature, and viscosity. Vortex flow meter sensors have no moving mechanical parts, resulting in high reliability, low maintenance, and long-term stable instrument parameters.

[0003] The vortex flow meter uses a piezoelectric stress sensor, which is mainly used for flow measurement of fluid media in industrial pipelines, such as gas, liquid, steam and other media.

[0004] When fluid passes through a vortex flow transmitter in a pipe, two rows of vortices, proportional to the flow velocity, are generated alternately up and down behind the vortex generator. The release frequency of the vortex is related to the average velocity of the fluid flowing through the vortex generator and the characteristic width of the vortex generator. Then, the number of vortices is detected by a sensor, and the flow velocity of the fluid is determined based on the number of vortices.

[0005] Existing sensors for vortex flow meters have the following drawbacks: Traditional vortex flow meter sensor structures are relatively sensitive to vibration. When installed in environments with high vibration, the vibration of the measuring tube can cause abnormal sensor detection, resulting in inaccurate flow meter measurements, increased errors, or even failure to function properly. Vibration interference can originate not only from the vibration of the equipment itself but also from the mechanical vibration of the surrounding environment, leading to inaccurate flow meter measurements. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a sensor for vortex flow meters. The technical solution adopted in this application is as follows:

[0007] A sensor for a vortex flow meter includes a measuring tube and a signal sensor, both of which are located inside the measuring tube. It also includes a shock-resistant mechanism, which includes a shock-resistant sensor and a coupler. The shock-resistant sensor is located outside the measuring tube and is arranged in opposite directions to the signal sensor. Both the shock-resistant sensor and the signal sensor are electrically connected to the coupler, which couples the output signals of the shock-resistant sensor and the signal sensor.

[0008] Preferably, the seismic mechanism further includes a seismic shell, which penetrates the measuring tube and is fixedly mounted on the measuring tube. Both the seismic sensor and the signal sensor are located inside the seismic shell.

[0009] Preferably, the anti-vibration shell is provided with a connecting part fixed on the wall of the measuring tube, and the anti-vibration sensor and the signal sensor are symmetrically arranged relative to the connecting part.

[0010] Preferably, the anti-vibration shell is further filled with a filling glue.

[0011] Preferably, the vortex flowmeter sensor further comprises a dial and a converter, and the converter is arranged between the coupler and the dial.

[0012] Preferably, the vortex flowmeter sensor further comprises a dial support rod, and the dial is arranged on the dial support rod.

[0013] Preferably, the vortex flowmeter sensor further comprises a vortex generator, and the vortex generator is arranged in the measuring tube and behind the signal sensor.

[0014] Preferably, the signal sensor and the vortex generator are both straight prisms, and the widths of the signal sensor and the vortex generator are the same.

[0015] Preferably, the measuring tube is provided with flanges at both ends.

[0016] The advantages of the present application are as follows:

[0017] The fluid passes through the measuring tube, and the signal sensor is used to measure the flow signal generated when the fluid passes; when the vibration is generated, the anti-vibration sensor and the signal sensor generate signals of the same intensity and opposite polarity due to the vibration, the coupler couples the output signals of the anti-vibration sensor and the signal sensor, and the signals generated by the anti-vibration sensor and the signal sensor due to the vibration are offset to each other, so that the signal sensor outputs stable and accurate flow signals, and stable anti-vibration effect is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0019] Figure 1 is a schematic view of a vortex flowmeter sensor;

[0020] Figure 2 is a schematic view of a signal sensor and an anti-vibration mechanism;

[0021] Figure 3 is a schematic view of the principle of measuring flow by the vortex flowmeter sensor in the case of no vibration;

[0022] Figure 4This is a schematic diagram showing that the sensor of a vortex flow meter has no flow under vibration.

[0023] Figure 5 This is a schematic diagram illustrating the principle of a vortex flow meter measuring flow rate under vibration using a sensor.

[0024] Figure 6 This is a schematic diagram of the dial support rod.

[0025] Explanation of symbols in the diagram:

[0026] 1 is the measuring tube, and 11 is the flange;

[0027] 2 is a signal sensor;

[0028] 3 is the seismic resistance mechanism, 31 is the seismic sensor, 32 is the coupler, 33 is the seismic resistance shell, and 331 is the connecting part;

[0029] 4 is a vortex generator;

[0030] 5 is the dial support rod. Detailed Implementation

[0031] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0032] The sensor for the vortex flow meter provided in the embodiments of this application will now be described.

[0033] Example 1

[0034] like Figure 1 and Figure 2 As shown, a sensor for a vortex flowmeter includes a measuring tube 1, a signal sensor 2, and a shock-resistant mechanism 3. The signal sensor 2 is located inside the measuring tube 1. The shock-resistant mechanism 3 includes a shock-resistant sensor 31 and a coupler 32. The shock-resistant sensor 31 is located outside the measuring tube 1 and is arranged in opposite directions to the signal sensor 2. Both the shock-resistant sensor 31 and the signal sensor 2 are electrically connected to the coupler 32, which couples the output signals of the shock-resistant sensor 31 and the signal sensor 2.

[0035] Fluid passes through the measuring tube 1, and the signal sensor 2 is used to measure the flow signal generated when the fluid passes through. When vibration occurs, the vibration sensor 31 and the signal sensor 2 generate electrical signals of the same intensity but opposite polarity due to the vibration. The coupler 32 couples the output signals of the vibration sensor 31 and the signal sensor 2. The signals generated by the vibration of the vibration sensor 31 and the signal sensor 2 cancel each other out, ensuring that the signal sensor 2 outputs a stable and accurate flow signal, thereby achieving a stable vibration resistance effect.

[0036] The anti-vibration mechanism 3 further comprises an anti-vibration shell 33, which penetrates the measuring pipe and is fixed on the measuring pipe 1, and the anti-vibration sensor 31 and the signal sensor 2 are both arranged in the anti-vibration shell 33; the vibration from the device itself or the mechanical vibration from the surrounding environment can generate signals with the same intensity and opposite polarity at the anti-vibration sensor 31 and the signal sensor 2, further ensuring that the signal sensor 2 outputs stable and accurate flow signals.

[0037] The anti-vibration shell 33 is provided with a connecting portion 331, which is fixed on the wall of the measuring pipe 1, and the anti-vibration sensor 31 and the signal sensor 2 are symmetrically arranged about the connecting portion 331.

[0038] The anti-vibration shell 33 is further filled with filling glue, which can ensure that the anti-vibration sensor 31 and the signal sensor 2 vibrate synchronously, the signals about the vibration are mutually offset, and the accuracy of the sensor for measuring the vortex flowmeter is further ensured.

[0039] The sensor for the vortex flowmeter further comprises a dial and a converter, which is arranged between the coupler 32 and the dial, and the converter receives the output signal of the coupler, converts the signal, and then transmits it to the dial.

[0040] The sensor for the vortex flowmeter further comprises a vortex generator 4, which is arranged in the measuring pipe 1 and is arranged directly behind the signal sensor 2; the fluid passing through the vortex generator 4 will generate vortexes, ensuring that the signal sensor 2 can obtain accurate vortex flow signals.

[0041] The signal sensor 2 and the vortex generator 4 are both straight prisms, and the width of the signal sensor 2 and the vortex generator 4 is the same, so that the signal sensor 2 can more accurately measure the vortex flow signal.

[0042] Both ends of the measuring pipe 1 are provided with flanges 11, which are convenient for connecting with external pipelines.

[0043] As shown in Figure 1 and Figure 6 , the sensor for the vortex flowmeter further comprises a dial support rod 5, which is arranged outside the measuring pipe 1, and the dial is arranged on the dial support rod 5.

[0044] The working principle of the sensor for the vortex flowmeter is as follows:

[0045] As shown in Figure 3 , the sensor for the vortex flowmeter measures the flow under the condition of no vibration, and the signal sensor 2 and the anti-vibration sensor 31 do not generate vibration signals, so that the signal sensor 2 can accurately measure the flow signal;

[0046] As shown in Figure 4As shown, when the vortex flow meter sensor is vibrating, the vibration sensor 31 and the signal sensor 2 generate electrical signals of the same intensity but opposite polarity due to the vibration. The coupler 32 couples the output signals of the vibration sensor 31 and the signal sensor 2, and the output signal is zero.

[0047] like Figure 5 As shown, the vortex flow meter uses sensors to measure flow under vibration. The vibration sensor 31 and the signal sensor 2 generate electrical signals of the same intensity but opposite polarity due to vibration. The signal sensor 2 measures the flow signal normally. The coupler 32 couples the output signals of the vibration sensor 31 and the signal sensor 2. The signals generated by the vibration sensor 31 and the signal sensor 2 cancel each other out. The flow signal of the signal sensor 2 is output through the coupler 32 without interfering with the measurement of the flow signal.

[0048] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A sensor for a vortex flowmeter comprising a measuring tube and a signal sensor, said signal sensor being arranged in said measuring tube, characterized in that: Further comprising an anti-vibration mechanism, the anti-vibration mechanism comprising an anti-vibration sensor and a coupler, the anti-vibration sensor being arranged outside the measuring tube, the anti-vibration sensor being arranged reversely to the signal sensor, the anti-vibration sensor and the signal sensor being electrically connected to the coupler, the coupler coupling the output signals of the anti-vibration sensor and the signal sensor.

2. The sensor for a vortex flowmeter of claim 1, wherein: The anti-vibration mechanism further comprises an anti-vibration shell, the anti-vibration shell penetrating through the measuring tube and being fixedly arranged on the measuring tube, the anti-vibration sensor and the signal sensor being arranged in the anti-vibration shell.

3. The sensor for a vortex flowmeter of claim 2, wherein: The anti-vibration shell is provided with a connecting portion, the connecting portion being fixedly arranged on the tube wall of the measuring tube, the anti-vibration sensor and the signal sensor being symmetrically arranged about the connecting portion.

4. The sensor for a vortex flowmeter of claim 3, wherein: The anti-vibration shell is further filled with a filling glue.

5. The sensor for a vortex flowmeter according to any one of claims 1 to 4, characterized in that: Further comprising a dial and a converter, the converter being arranged between the coupler and the dial.

6. The sensor for a vortex flowmeter of claim 5, wherein: Further comprising a dial support rod, the dial support rod being arranged outside the measuring tube, the dial being arranged on the dial support rod.

7. The sensor for a vortex flowmeter according to any one of claims 1 to 4, characterized in that: Further comprising a vortex generator, the vortex generator being arranged in the measuring tube, the vortex generator being arranged right behind the signal sensor.

8. The sensor for a vortex flowmeter of claim 7, wherein: The signal sensor and the vortex generator are both straight prismatic, the widths of the signal sensor and the vortex generator being the same.

9. The sensor for a vortex flowmeter according to any one of claims 1 to 4, characterized in that: Both ends of the measuring tube are provided with flanges.

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