Dual-probe flow housing
By adopting a dual-probe design and a flow channel structure in the vortex flow meter, the problems of insufficient lower limit of the measurement range and insufficient vibration resistance of the single-probe vortex flow meter are solved, achieving higher measurement accuracy and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WEIHAI DUOTERI AUTOMATION EQUIP CO LTD
- Filing Date
- 2025-10-27
- Publication Date
- 2026-07-24
AI Technical Summary
Existing vortex flow meters use a single probe, which has an insufficient lower limit of the measuring range, unstable measurement accuracy in vibrating environments, and insufficient anti-interference capability.
The device employs a dual-probe design, with probes symmetrically installed on both sides of the vortex flowmeter's generator. It is equipped with two sensors to monitor vortex signals and calculates the signal difference to improve measurement accuracy and vibration resistance. The flow channel optimizes the entry of vortex signals into the probes.
The lower limit of the flow measurement range has been increased, improving the accuracy of the measurement and its vibration resistance, ensuring that minute flow signals are not lost, and that the signal cancels out vibration interference.
Smart Images
Figure CN224552458U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of vortex flow meters, and in particular to a dual-probe flow housing. Background Technology
[0002] Vortex flow meters are volumetric flow meters designed 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. The dual-probe flow meter housing is characterized by low pressure loss, a wide measuring range, and high accuracy. When measuring volumetric flow rate under operating conditions, it is virtually unaffected by parameters such as fluid density, pressure, temperature, and viscosity. The dual-probe flow meter housing utilizes a piezoelectric stress sensor and is primarily used for flow measurement of various media in industrial pipelines, such as gases, liquids, and steam.
[0003] 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.
[0004] Existing vortex flow meters have the following drawbacks: they use a single probe, resulting in insufficient lower limit of the measuring range; they are relatively sensitive to vibration, and when installed in environments with high vibration, the vibration of the measuring tube can cause abnormal sensor detection, and their anti-interference capability is insufficient. Summary of the Invention
[0005] To address the shortcomings in the aforementioned background technology, a dual-probe flow housing is proposed.
[0006] This application provides a dual-probe flow housing, including a measuring tube and a generator. The measuring tube has a measuring cavity, and the generator is located inside the measuring cavity. It also includes a detection mechanism, which includes a first probe, a second probe, a first sensor, and a second sensor. The first sensor is located inside the first probe, and the second sensor is located inside the second probe. The first and second probes are located on the inner wall of the measuring tube. Both the first and second probes are blind holes, and their openings face downwards and communicate with the test cavity. The first and second probes are symmetrically arranged about the generator.
[0007] Preferably, the generator is in the shape of a right prism, the bottom surface of the generator is in the shape of an isosceles triangle, and the bottom edge of the bottom surface of the generator is located at the rear.
[0008] Preferably, the generator includes a first drainage channel and a second drainage channel, which are symmetrically arranged on both sides of the generator. The top of the first drainage channel faces the first probe hole and is interconnected with it, and the top of the second drainage channel faces the second probe hole and is interconnected with it.
[0009] Preferably, both the first and second probe holes are attached to the side of the generator.
[0010] Preferably, both the first and second probe holes are partially embedded in the generator, and there is a gap between the first and second probe holes.
[0011] Preferably, both the first and second probe holes are located in front of the generator and close to the front end of the generator.
[0012] Preferably, the distance between the first probe hole and the second probe hole does not exceed twice the width of the generator.
[0013] Preferably, the interiors of both the first and second probe holes are cylindrical.
[0014] The beneficial effects of this application are: When fluid passes through the generator, vortices are generated. The first and second probes are symmetrically installed on both sides of the generator. The two rows of vortices generated will enter the first and second probes respectively. The first and second sensors are respectively installed in the first and second probes. The first and second sensors monitor the signals of their respective probes. During signal processing, the difference between the signals of the first and second sensors is calculated. Even small flow signals will not be lost, ensuring measurement accuracy and increasing the lower limit of the measurement range. When calculating the difference between the vibration signals generated by the two probes, they will cancel each other out, and the vibration resistance is also improved. The design of the first and second diversion channels ensures that vortex signals can enter the first and second probe holes more smoothly, and even tiny vortex signals can enter the first and second probe holes, further ensuring measurement accuracy and reliability. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of the dual-probe flow housing in Example 1; Figure 2 This is a schematic diagram of the first structure in Example 1; Figure 3 This is a schematic diagram of the second structure in Example 1; Figure 4 The dual-probe flow housing of Example 2 is shown in the figure; Figure 5 This is a schematic diagram of the first structure in Example 2; Figure 6 This is a schematic diagram of the second structure in Example 2.
[0017] Explanation of symbols in the diagram: 1 is the measuring tube, 11 is the measuring chamber, and 12 is the flange; 2 is the generator, 21 is the first diversion channel, and 22 is the second diversion channel; 3 is the detection mechanism, 31 is the first probe hole, 32 is the second probe hole, 33 is the first sensor, and 34 is the second sensor. Detailed Implementation
[0018] 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.
[0019] Example 1 like Figures 1 to 3 As shown, a dual-probe flow housing includes a measuring tube 1 and a generator 2. The measuring tube 1 has a measuring cavity 11, and the generator 2 is located inside the measuring cavity 11. It also includes a detection mechanism 3, which includes a first probe 31, a second probe 32, a first sensor 33, and a second sensor 34. The first sensor 33 is located inside the first probe 31, and the second sensor 34 is located inside the second probe 32. The first probe 31 and the second probe 32 are located on the inner wall of the measuring tube 1. Both the first probe 31 and the second probe 32 are blind holes. The openings of both the first probe 31 and the second probe 32 face downward and are connected to the test cavity 11. The first probe 31 and the second probe 32 are arranged symmetrically about the generator 2.
[0020] When the fluid passes through the generator 2, vortices are generated. The first probe 31 and the second probe 32 are symmetrically installed on both sides of the generator 2. The two rows of vortices generated will enter the first probe 31 and the second probe 32 respectively. The first sensor 33 and the second sensor 34 are respectively installed in the first probe 31 and the second probe 32. The first sensor 33 and the second sensor 34 monitor the signals of their respective probes. During signal processing, the difference between the signals of the first sensor 33 and the second sensor 34 is calculated. Even small flow signals will not be lost, ensuring the accuracy of the measurement and increasing the lower limit of the measurement range. When calculating the difference between the vibration signals generated by the two probes, they cancel each other out, and the vibration resistance is also improved.
[0021] The generator 2 is in the shape of a right prism, and the bottom surface of the generator 2 is in the shape of an isosceles triangle, with the bottom edge of the bottom surface of the generator 2 located at the rear.
[0022] The generator 2 includes a first drainage channel 21 and a second drainage channel 22. The first drainage channel 21 and the second drainage channel 22 are symmetrically arranged on both sides of the generator 2. The top of the first drainage channel 21 is directly opposite the first probe hole 31 and they are connected to each other. The top of the second drainage channel 22 is directly opposite the second probe hole 32 and they are connected to each other.
[0023] The design of the first diversion groove 21 and the second diversion groove 22 ensures that the vortex signal can enter the first probe hole 31 and the second probe hole 32 more smoothly, and even small vortex signals can enter the first probe hole 31 and the second probe hole 32, further ensuring the accuracy and reliability of the measurement.
[0024] Both the first probe hole 31 and the second probe hole 32 are attached to the side of the generator 2.
[0025] Both the first probe hole 31 and the second probe hole 32 are partially embedded in the generator 2, and there is a gap between the first probe hole 31 and the second probe hole 32.
[0026] The interiors of both the first probe hole 31 and the second probe hole 32 are cylindrical, ensuring smooth signal transmission and preventing interference signals.
[0027] Both ends of the measuring tube 1 are equipped with flanges 12, which facilitates connection with the pipe to be tested.
[0028] Example 2 like Figures 4 to 6 As shown, this is the second embodiment of the present invention. The dual-probe flow housing in the second embodiment is basically the same as that in embodiment 1, and the similarities will not be repeated. The difference is that the first probe 31 and the second probe 32 are both located in front of the generator 2 and close to the front end of the generator 2; the side of the generator 2 is smooth and does not have the first flow channel 21 and the second flow channel 22.
[0029] The distance between the first probe hole 31 and the second probe hole 32 shall not exceed twice the width of the generator. If it exceeds this range, it will cause loss of vortex signal and result in inaccurate measurement results.
[0030] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.
Claims
1. A dual-probe flow housing, comprising a measuring tube and a generator, wherein the measuring tube has a measuring cavity, and the generator is disposed within the measuring cavity, characterized in that: It also includes a detection mechanism, which comprises a first probe hole, a second probe hole, a first sensor, and a second sensor. The first sensor is disposed within the first probe hole, and the second sensor is disposed within the second probe hole. The first probe hole and the second probe hole are disposed on the inner wall of the measuring tube. Both the first probe hole and the second probe hole are blind holes. The openings of both the first probe hole and the second probe hole face downward and are connected to the measuring cavity. The first probe hole and the second probe hole have the same shape and are arranged symmetrically about the generator.
2. The dual-probe flow housing according to claim 1, characterized in that, The generator is in the shape of a right prism, and the bottom surface of the generator is in the shape of an isosceles triangle, with the bottom edge of the bottom surface of the generator located at the rear.
3. The dual-probe flow housing according to claim 2, characterized in that, The generator includes a first drainage channel and a second drainage channel, which are symmetrically arranged on both sides of the generator. The top of the first drainage channel is directly opposite the first probe hole and they are connected to each other, and the top of the second drainage channel is directly opposite the second probe hole and they are connected to each other.
4. The dual-probe flow housing according to claim 3, characterized in that, Both the first and second probe holes are attached to the side of the generator.
5. The dual-probe flow housing according to claim 3, characterized in that, Both the first and second probes are partially embedded in the generator, and there is a gap between the first and second probes.
6. The dual-probe flow housing according to claim 2, characterized in that, Both the first and second probe holes are located in front of the generator and close to its front end.
7. The dual-probe flow housing according to claim 6, characterized in that, The distance between the first probe and the second probe does not exceed twice the width of the generator.
8. The dual-probe flow housing according to any one of claims 1 to 7, characterized in that, The interiors of both the first and second probe holes are cylindrical.