Fuel gas rectifier and flow meter

Abstract

The utility model discloses a fuel gas rectifier and a flow meter. The fuel gas rectifier comprises a hollow cylindrical part, the mounting ring is arranged on the outer end face of the cylindrical part; a plurality of shunting channels which extend in the length direction of the cylindrical part and are not communicated with one another are uniformly distributed in the cylindrical part; according to the flow meter, after the gas medium entering the flow meter is rectified by the rectifier, pulsating flow energy existing in fluid is completely dispersed, the fluid is transited to a laminar flow state from a turbulent flow state, the influence of pulsating flow is eliminated, and the flow meter has the advantages of being simple in structure, convenient to use and high in efficiency. Therefore, the fluid detection effect of the ultrasonic flowmeter is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas metering devices, and in particular relates to a gas rectifier and a flow meter. Background Art

[0002] The ultrasonic flowmeter is a precision multi-channel gas ultrasonic flowmeter designed for measurement applications requiring high accuracy and reliability. It is mainly used for natural gas trade measurement, serving urban gas and industrial and commercial users. The upper part is connected to a corrector with integrated temperature and pressure correction function, which can convert the working volume flow measured by the flowmeter into the standard volume flow, such as Figure 1 、 Figure 2 shown.

[0003] Most ultrasonic gas flowmeters currently on the market are transit-time ultrasonic flowmeters. When ultrasonic waves propagate through a flowing medium, their velocity, relative to a fixed coordinate system, differs from that in a stationary medium. This change is related to the flow rate of the medium. Therefore, the change in ultrasonic velocity can be used to determine the flow rate. Transit-time ultrasonic flowmeters are designed based on this principle.

[0004] Chinese patent application number CN202410796391.6 discloses a gas ultrasonic flowmeter with a calibration function, which includes a gas ultrasonic flowmeter body and a connecting seat. The top of the connecting seat is provided with an installation groove for installing and accommodating the gas ultrasonic flowmeter body.

[0005] As the applicant conducted further research, it was found that the technical solution had inaccuracies in measurement. The reason was that the flow meter using the ultrasonic principle needed to ensure that the gas flow medium entering the flow meter was uniform and stable when in operation. However, in actual use, due to factors such as pipe elbows and valves in the metering pipeline, the state and distribution of the gas medium inflow would be adversely affected, causing the fluid medium to flow disorderly and irregularly in the pipeline and medium metering channel, thereby affecting the accuracy of gas medium measurement. Utility Model Content

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A gas rectifier, comprising:

[0008] A hollow cylindrical member;

[0009] A mounting ring, arranged on the outer end surface of the cylindrical member;

[0010] The cylindrical member is provided with a plurality of mutually disconnected flow diversion channels extending along the length direction of the cylindrical member;

[0011] The external gas medium passes through the branch channel from one end of the cylindrical member and is evenly dispersed from the other end of the cylindrical member.

[0012] Furthermore, a plurality of countersunk holes are evenly distributed on the circumference of the mounting ring.

[0013] Furthermore, the cross section of each group of diversion channels is polygonal, and multiple groups of diversion channels are combined into a honeycomb shape.

[0014] Furthermore, the cross-section of the diversion channel is a regular hexagon.

[0015] Furthermore, one or more positioning structures are provided on the inner side of the mounting ring.

[0016] Furthermore, the positioning structure includes protrusions and / or grooves.

[0017] The utility model also provides a gas flow meter, comprising a meter body and the above-mentioned rectifier, wherein the side of the meter body is provided with a mounting groove.

[0018] Furthermore, at least one set of ultrasonic packaging components is provided in pairs on both sides of the medium channel of the meter body.

[0019] Furthermore, a pressure sensor and a temperature sensor are provided in the meter body.

[0020] Furthermore, locking holes are evenly distributed on the circumference of the installation groove.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The gas medium entering the flow meter is rectified by the rectifier, and the pulsating flow energy in the fluid is completely dispersed, so that the fluid transitions from a turbulent state to a laminar state, eliminating the influence of the pulsating flow, thereby effectively improving the ultrasonic flow meter's detection effect on the fluid.

[0023] The mounting ring is matched with the mounting groove in the meter body, so that the entire rectifier is placed inside the meter body, making the entire flow meter smaller and more compact. There is no need to add an external rectifier between the meter body and the gas pipeline, which reduces the connection process and assembly materials with the flanges on both sides. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of the flow meter according to an embodiment of the present utility model;

[0025] Figure 2 This is a schematic diagram of the explosion structure of the flow meter according to the embodiment of the utility model;

[0026] Figure 3 This is a schematic diagram of the cross-sectional structure of the watch body of an embodiment of the utility model;

[0027] Figure 4 Schematic diagram of the three-dimensional structure of the rectifier according to the embodiment of the present invention (viewing angle 1);

[0028] Figure 5 Schematic diagram of the three-dimensional structure of the rectifier according to the embodiment of the utility model (viewing angle 2);

[0029] Figure 6 This is a schematic cross-sectional view of a rectifier according to an embodiment of the present invention;

[0030] The reference numerals in the drawings of the specification include:

[0031] Cylindrical part 1, mounting ring 10, counterbore 100, diversion channel 11, positioning structure 12, meter body 2, mounting groove 20, locking hole 200, medium channel 21, ultrasonic packaging component 22, pressure sensor 23, temperature sensor 24, cover plate 25, corrector 3. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0033] The accompanying drawings are for illustrative purposes only and are schematic rather than physical representations, and should not be construed as limiting this patent. To better illustrate the embodiments of the present invention, certain components of the accompanying drawings may be omitted, enlarged, or reduced in size, and do not represent the dimensions of actual products. It is understandable to those skilled in the art that certain well-known structures and their descriptions may be omitted from the accompanying drawings. Identical or similar reference numerals in the accompanying drawings of the embodiments of the present invention correspond to identical or similar components. In the description of the present invention, it should be understood that the terms "upper," "lower," "left," "right," "inner," "outer," and the like, indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, the terms describing positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. Those skilled in the art will understand the specific meanings of the above terms based on specific circumstances.

[0034] like Figure 1 - Figure 6 As shown, a gas rectifier of the present invention comprises a hollow cylindrical member 1, and a mounting ring 10 is provided on the outer end surface of the cylindrical member 1;

[0035] The cylindrical member 1 is provided with a plurality of diversion channels 11 extending along the length direction of the cylindrical member 1 and not connected to each other.

[0036] The external gas medium passes through the branch channel 11 from one end of the cylindrical member 1 and is evenly dispersed from the other end of the cylindrical member 1.

[0037] The gas medium entering the flow meter is rectified by the rectifier, and the pulsating flow energy in the fluid is completely dispersed, so that the fluid transitions from a turbulent state to a laminar state, eliminating the influence of the pulsating flow, thereby effectively improving the ultrasonic flow meter's detection effect on the fluid.

[0038] A plurality of countersunk holes 100 are evenly distributed on the circumference of the mounting ring 10 . Specifically, during assembly, the rectifier can be mounted on the air inlet end of the flow meter by using cross countersunk screws through the countersunk holes 100 .

[0039] The mounting ring 10 cooperates with the mounting groove 20 in the meter body 2 so that the entire rectifier is placed inside the meter body 2, thereby making the entire flow meter smaller and more compact. There is no need to add an external rectifier between the meter body 2 and the gas pipeline, which reduces the connection process and assembly materials with the flanges on both sides.

[0040] like Figure 4 、 Figure 5 、 Figure 6 As shown, the cross section of each group of flow channels 11 is polygonal, and multiple groups of flow channels 11 are combined into a honeycomb shape.

[0041] The polygonal shape allows the incoming gas medium to be evenly filled in the medium channel 21, which is beneficial to the measurement of the ultrasonic sensor.

[0042] The cross-section of the diversion channel 11 in this embodiment includes but is not limited to a regular hexagon, and can also be an octagon, etc.

[0043] like Figure 5 、 Figure 6 As shown, one or more positioning structures 12 are provided inside the mounting ring 10. The purpose of providing the positioning structures 12 is to facilitate the installation of the rectifier.

[0044] Insert the end of the rectifier away from the mounting ring 10 into the air inlet end of the meter body 2 and extend it into the medium channel 21. Finally, the multiple countersunk holes 100 on the mounting ring 10 need to be aligned with the mounting grooves 20 on the meter body 2 before fasteners such as countersunk screws can be used to connect and fix them. During this alignment operation, the rectifier needs to be rotated by the palm of your hand and pressed down to prevent it from rotating before the fasteners are tightened, causing the holes to be misaligned.

[0045] This solution adopts a positioning structure 12, so that during the initial alignment process, there is no need to stare at the holes to determine whether they are aligned. You only need to press with your hands while rotating the rectifier. Due to the use of the positioning structure 12, the rectifier countersunk holes 100 are aligned more conveniently. Moreover, during the subsequent fastener fixing process, the rectifier will not undergo a secondary rotation to affect the alignment of the holes. The addition of the positioning structure 12 makes the installation process of the rectifier more convenient and user-friendly.

[0046] The positioning structure 12 can be in the form of protrusions and grooves. Specifically, in the setting, a protrusion can be set on the rectifier, and a matching number of grooves can be opened at the corresponding positions of the meter body 2. Similarly, the above-mentioned setting positions can also be swapped, such as the protrusion is set on the meter body 2 and the groove is set on the rectifier. It is even possible to alternately set protrusions and grooves on the rectifier, and also set grooves and protrusions at the corresponding positions of the meter body 2. The above-mentioned various methods all fall within the protection scope of this application.

[0047] The present invention further provides a gas flow meter, comprising a meter body 2 and the above-mentioned rectifier. The meter body 2 has a mounting groove 20 on its side, and locking holes 200 are evenly distributed on the circumference of the mounting groove 20 .

[0048] At least one set of ultrasonic packaging components 22 is paired on either side of the media channel 21 of the meter body 2. A cover plate 25 is bolted to the side of the meter body 2 to shield the ultrasonic packaging components 22. These ultrasonic packaging components 22 contain ultrasonic sensors, each set of which is paired and symmetrically staggered on either side of the central axis of the media channel 21. These sensors collect and detect the flow velocity of the gaseous medium and calculate the corresponding flow rate based on the different diameters of the flowmeter's media channel 21. The collected and detected data is then processed by the correction device 3 located above for display and storage.

[0049] In addition, a pressure sensor 23 and a temperature sensor 24 are provided in the meter body 2. Figure 3 shown.

[0050] The above are only embodiments of the present invention. Common knowledge such as the known specific structures and characteristics in the scheme is not described in detail here. Ordinary technicians in the relevant field are aware of all common technical knowledge in the technical field of the utility model before the application date or priority date, can obtain all existing technologies in the field, and have the ability to apply conventional experimental means before that date. Ordinary technicians in the relevant field can improve and implement this scheme based on their own abilities under the guidance of this application. Some typical known structures or methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the utility model, they can also make several variations and improvements, which should also be regarded as the scope of protection of the utility model. These will not affect the effect of the implementation of the utility model and the practicality of the patent.

Claims

1. A gas rectifier, characterized in that: include: A hollow cylindrical member; A mounting ring, arranged on the outer end surface of the cylindrical member; The cylindrical member is provided with a plurality of mutually disconnected flow diversion channels extending along the length direction of the cylindrical member; The external gas medium passes through the branch channel from one end of the cylindrical member and is evenly dispersed from the other end of the cylindrical member.

2. A gas rectifier according to claim 1, characterized in that: One or more positioning structures are arranged on the inner side of the mounting ring.

3. A gas rectifier according to claim 2, characterized in that: The positioning structure includes a protrusion and / or a groove.

4. A gas rectifier according to claim 1, 2 or 3, characterized in that: The cross section of each group of diversion channels is polygonal, and multiple groups of diversion channels are combined into a honeycomb shape.

5. A gas rectifier according to claim 4, characterized in that: The cross section of the diversion channel is a regular hexagon.

6. A gas rectifier according to claim 1, characterized in that: A plurality of countersunk holes are evenly distributed on the circumference of the mounting ring.

7. A gas flow meter, comprising a meter body and a rectifier, characterized in that: The rectifier is the rectifier according to any one of claims 1 to 6, and the side of the meter body has a mounting groove.

8. A gas flow meter according to claim 7, characterized in that: At least one set of ultrasonic packaging components is arranged in pairs on both sides of the medium channel of the meter body.

9. A gas flow meter according to claim 7, characterized in that: A pressure sensor and a temperature sensor are provided in the meter body.

10. A gas flow meter according to claim 7, 8 or 9, characterized in that: Locking holes are evenly distributed on the circumference of the installation groove.

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