Fuel gas rectifying assembly with filtering structure

Abstract

The utility model discloses a fuel gas rectifying assembly with a filtering structure. The fuel gas rectifying assembly comprises a cylindrical main body and a filter screen, wherein the cylindrical main body is hollow, one end of the cylindrical main body is provided with a flow guide part, and the other end of the cylindrical main body is provided with a mounting part; a plurality of air holes are distributed in the peripheral wall of the cylindrical main body along the axis direction; by adopting the rectifying assembly, after airflow at different flow speeds is rectified, the flow speed distribution of a gas medium entering the metering instrument tends to be consistent, the stable average flow speed can be conveniently obtained, and accurate data can be conveniently obtained through the detection of an ultrasonic sensor.

Description

TECHNICAL FIELD

[0001] The utility model belongs to gas metering equipment technical field, concretely relates to a gas rectifier assembly with filter structure. BACKGROUND

[0002] Compared with the traditional diaphragm gas meter, the advantages of ultrasonic gas meter are obvious: high accuracy, good reliability, strong real-time performance, and incomparable advantages in volume, precision, repeatability, and life, maintenance and intelligent expansion. Selecting ultrasonic gas meter will become the trend in the field of gas metering.

[0003] The flow channel design of the ultrasonic gas meter directly affects the accuracy of its measurement. The general ultrasonic gas meter flow channel is unstable in airflow velocity distribution without rectification, has a narrow flow range and a large fluctuation range, and the repeatability of the calculated flow velocity is not good, and the measurement accuracy is not high.

[0004] The Chinese patent with application number CN202211648738.X discloses an ultrasonic metering instrument, which includes a metering module and a valve assembly, both of which are arranged inside the ultrasonic metering instrument; a rectification structure is arranged at least one of the inlet end of the metering module and the inlet end of the valve assembly, the rectification structure includes a first pipe portion, a second pipe portion and an arc portion, the first pipe portion and the second pipe portion are arranged at an angle, the arc portion is connected between the first pipe portion and the second pipe portion, the first pipe portion is used for receiving fluid, and the second pipe portion is used for outputting fluid, so that the outlet end of the valve assembly is arranged away from the direction of the inlet end of the metering module.

[0005] With the applicant's further research, it is found that because the rectifier in the technical solution processes the airflow of the flow channel or external pipeline in the metering instrument, but is affected by some dust, particles and other impurities contained in the conveying gas medium, the data detected by the ultrasonic sensor has deviation and reduces the service life of the metering instrument. UTILITY MODEL CONTENTS

[0006] To solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A gas rectifier assembly with a filter structure includes a cylindrical body and a filter screen.

[0008] The cylindrical body is hollow, one end of the cylindrical body has a flow guide portion, and the other end has a mounting portion.

[0009] The peripheral wall of the cylindrical body is provided with a plurality of air holes along the axis direction.

[0010] The filter screen is sleeved on the outer periphery of the cylindrical body.

[0011] The pressing strips are arranged on the outer periphery of the cylindrical body, and the filter screen is abutted against the outer wall of the cylindrical body.

[0012] Further, the outer periphery of the cylindrical body is provided with a flexible band, and the pressing strips are fixed on the outer periphery of the cylindrical body by the flexible band.

[0013] Further, the flexible band is arranged in at least two groups and is distributed along the axial direction of the cylindrical body.

[0014] Further, the flexible band comprises a rubber band.

[0015] Further, the flow guide part is conical and is arranged at the tail of the cylindrical body.

[0016] Further, the mounting part is arranged at the head of the cylindrical body, and the mounting part is provided with a stop ring and a sealing ring.

[0017] Further, the stop ring and the sealing ring are provided with annular grooves.

[0018] Compared with the prior art, the utility model has the advantages of:

[0019] The rectifying assembly is adopted, the airflow at different flow rates is subjected to rectifying treatment, the flow rate distribution of the gas medium entering the meter tends to be consistent, the stable average flow rate is obtained, the accurate data is obtained by the ultrasonic sensor, the various small impurities contained in the rectified gas medium are blocked, the ultrasonic sensor is prevented from being adversely affected by the adhesion of the gas medium to the inner wall of the meter channel after long-time use, the damage of the internal components of the meter is avoided, and the service life of the meter is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a whole structure schematic view of the rectifying assembly in the pipeline.

[0021] Figure 2 It is a left view structure schematic view. Figure 1

[0022] Figure 3 It is a sectional view structure schematic view of A-A. Figure 2

[0023] Figure 4 It is a sectional view structure schematic view of the rectifying assembly in the pipeline.

[0024] The reference signs in the drawings of the specification comprise:

[0025] ​​Cylindrical body 1, air vent 10, flow guide 2, mounting portion 3, stop ring 30, sealing ring 31, annular groove 32, filter screen 4, batten 5, flexible band 6, pipeline 7, flange 70. DETAILED DESCRIPTION

[0026] In order to make the technical personnel in the art can better understand the utility model, the following will be combined with the drawings and examples of the utility model technical scheme further explanation.

[0027] Among them, the drawings are only for example explanation, the representation is only schematic diagram, and not the real object drawing, can not be understood as the limitation of the patent; in order to better illustrate the embodiment of the utility model, some components of the drawing will be omitted, enlarged or reduced, and not represent the size of the actual product; for those skilled in the art, some well-known structures in the drawing and its description can be omitted, it is understood that the same or similar labels in the drawing of the embodiment of the utility model correspond to the same or similar parts; in the description of the utility model, it is understood that if the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore the positional relationship of the terms in the drawing is only for example explanation, and can not be understood as the limitation of the patent, for the ordinary skilled in the art, the specific meaning of the above terms can be understood according to the specific situation.

[0028] As Figure 1 - Figure 4 The utility model discloses a gas rectifying assembly with filter structure, including cylindrical body 1 and filter screen 4;

[0029] Among them, cylindrical body 1 is hollow, and cylindrical body 1 one end has flow guide 2, and the other end has mounting portion 3;

[0030] Cylindrical body 1 wall along the axis direction distribution has several air vents 10;

[0031] Adopt this rectifying assembly, make the airflow at different flow rates, after rectifying treatment, make the gas medium flow rate distribution that enters the meter tend to be consistent, facilitate to obtain stable average flow rate, benefit ultrasonic sensor detection obtains accurate data.

[0032] Filter screen 4, sleeve joint is in the outer periphery of cylindrical body 1;

[0033] Wherein, the filter screen 4 is sleeved on the outer periphery of the cylindrical body 1, so that various fine impurities contained in the gas medium after rectification treatment are blocked, adhesion to the inner wall of the meter channel and adverse effects on the ultrasonic sensor after long-term use are prevented, damage to internal components of the meter is avoided, and the service life of the meter is prolonged.

[0034] As shown in the drawings, a plurality of groups of pressing strips 5 are distributed on the outer periphery of the cylindrical body 1, and the filter screen 4 is abutted to the outer wall of the cylindrical body 1. Figure 3

[0035] The airflow channels are formed between the outer wall of the cylindrical body 1 and the pipeline 7 or the inner wall of the meter channel. In order to prevent the filter screen 4 from being raised outward under the action of airflow, the raised part of the filter screen 4 is located between the above-mentioned airflow channels, so that the local airflow is in a turbulent state, and the rectification effect is weakened. Therefore, a plurality of groups of pressing strips 5 are used to fix and press down the filter screen 4 to prevent the filter screen 4 from being raised upward.

[0036] Of course, the pressing strips 5 at this position can also use a plurality of annular rings to fix the filter screen 4 and avoid local upward lifting. The embodiment uses long strip-shaped pressing strips 5 which are parallel to the central axis of the cylindrical body 1. The plurality of groups of pressing strips 5 are uniformly distributed on the outer periphery of the cylindrical body 1.

[0037] As shown in the drawings, a plurality of groups of pressing strips 5 are distributed on the outer periphery of the cylindrical body 1, and the filter screen 4 is abutted to the outer wall of the cylindrical body 1. Figure 3

[0038] The flexible belt 6 is provided in at least two groups and is distributed along the axial direction of the cylindrical body 1.

[0039] Specifically, the flexible belt 6 can use a rubber band, which is a closed annular ring. In use, the rubber band is sleeved on the outer periphery of the filter screen 4, and under the action of the contraction force of the rubber band, the pressing strip 5 generates a downward pressure on the filter screen 4 to fix it. In addition, the flexible belt 6 can also use an adhesive tape and the like which has a certain elasticity, and when the pressing strip 5 is fixed, the flexible belt 6 is wound around the outer periphery of the cylindrical body 1.

[0040] Of course, other fixing structures of the pressing strip 5 can also be used, such as a clamp, a ribbon, etc., which are not limited here as long as the pressing strip 5 can generate a downward pressure on the filter screen 4 and tightly adhere to the outer wall of the cylindrical body 1.

[0041] In addition, the rectification flow guide part 2 is conical and is arranged at the tail of the cylindrical body 1. As shown in the drawings, the arrow direction is the flow direction of the airflow, and the airflow after flow rectification gradually converges in the radial direction under the action of the conical flow guide part 2 and enters the internal flow channel of the meter. Figure 3

[0042] ​​​In addition, the mounting portion 3 is arranged at the head of the cylindrical main body 1, and the mounting portion 3 is provided with a stop ring 30 and a sealing ring 31.

[0043] The stop ring 30 and the sealing ring 31 are provided with an annular groove 32. By matching the mounting portion 3 with the air inlet end of the meter body, the rectifier assembly is installed in the meter. Of course, the rectifier assembly can also be installed externally. Specifically, the rectifier assembly is arranged in the pipeline 7 provided with flanges 70 on both sides, and the flanges 70 are connected with the side of the meter. The external installation mode is also applicable to the mounting portion 3 of the rectifier assembly. The stop ring 30 plays a role of installation in place and limiting the axial movement amount, and the sealing ring can be installed in the annular groove 32 to prevent air overflow.

[0044] The above is only an embodiment of the present application, and the specific structure and characteristics of the scheme are not described in detail, and the ordinary technical personnel in the art know all the ordinary technical knowledge in the technical field of the present application before the application date or the priority date, can know all the prior art in the field, and has the ability to apply the conventional experimental means before the date, and the ordinary technical personnel in the art can improve and implement the scheme under the inspiration of the present application, and some typical known structures or known methods should not be an obstacle for the ordinary technical personnel to implement the present application. It should be pointed out that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application.

Claims

1. A gas rectifying assembly having a filter structure, characterized by, The utility model relates to a filter device, comprising: a hollow cylindrical body having a flow guide portion at one end and a mounting portion at the other end; a plurality of air-permeable holes distributed along the axial direction of the cylindrical body wall; a filter screen sleeved on the outer periphery of the cylindrical body; and a plurality of groups of pressing strips distributed on the outer periphery of the cylindrical body to abut the filter screen against the outer wall of the cylindrical body.

2. A gas rectifying assembly with filter structure as claimed in claim 1, characterized in that: The outer periphery of the cylindrical body is provided with a flexible band, and the pressing strips are fixed to the outer periphery of the cylindrical body by the flexible band.

3. A gas rectifying assembly with filter structure as claimed in claim 2, characterized in that: The flexible band is provided in at least two groups and is distributed along the axial direction of the cylindrical body.

4. The gas rectifying assembly with filter structure according to claim 2, characterized in that: The flexible band comprises a rubber band.

5. The gas rectifying assembly with filter structure according to claim 1, characterized in that: The flow guide portion is conical and is arranged at the tail of the cylindrical body.

6. A gas rectifying assembly with filtering structure as claimed in claim 1 or 5, wherein: The mounting portion is arranged at the head of the cylindrical body, and the mounting portion has a stop ring and a sealing ring.

7. A gas rectifying assembly with filter structure as claimed in claim 6, characterized in that: The stop ring and the sealing ring are provided with an annular groove.

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