Gas meter rectifying device and gas meter

Abstract

The utility model relates to the technical field of fluid metering, and discloses a gas meter rectifying device and a gas meter, the gas meter comprises a shell, a gas inlet pipeline is arranged on the shell, the gas meter rectifying device comprises a fairing and a connecting structure, the fairing is arranged on the gas inlet pipeline, the fairing is provided with a gas inlet channel and a plurality of rectifying ports, and the connecting structure is connected with the fairing. The connecting structure comprises a connecting part arranged on one of the fairing and the air inlet pipeline and a connecting matching part arranged on the other one of the fairing and the air inlet pipeline, the connecting part is matched with the connecting matching part, the fairing is detachably arranged at the air inlet pipeline, and the fairing can be disassembled and assembled under the condition that the shell is not opened. The fairing is arranged on the gas inlet pipeline of the gas meter and is detachably arranged at the gas inlet pipeline, so that the fairing can be disassembled and assembled without opening the shell, the fairing is convenient to disassemble and assemble, the internal space of the gas meter is effectively saved, the cost is reduced, and the metering accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid measurement, in particular to a gas meter rectification device and a gas meter. Background Art

[0002] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0003] At present, when gas meters are actually used, due to the existence of factors such as elbows, flow control valves, and pressure regulating devices, there are various fluctuations in the fluid, and the flow field is difficult to reach a stable state, which reduces the metering accuracy of the gas meter and affects the metering accuracy. Therefore, a rectifier is installed inside the gas meter.

[0004] When installing the existing rectifier, the base meter needs to be opened and the rectifier is installed inside the air inlet of the base meter, which is inconvenient to install and disassemble and occupies the compact space inside the base meter. Utility Model Content

[0005] The purpose of the utility model is to at least solve the problem that when installing the rectifier, the base meter needs to be opened and the rectifier is installed inside the air inlet of the base meter, which is inconvenient to install and disassemble and occupies the compact space inside the base meter. This purpose is achieved through the following technical solutions:

[0006] The first aspect of the utility model provides a gas meter rectifying device, the gas meter comprising a housing, the housing being provided with an air intake pipe, the gas meter rectifying device comprising:

[0007] A fairing, used to be arranged on the air intake duct, the fairing is provided with an air intake channel, and the fairing is provided with a plurality of fairing ports, and the fairing ports are communicated with the interior of the shell;

[0008] The connection structure includes a connection part and a connection matching part, wherein the connection part is arranged on one of the fairing and the air intake duct, and the connection matching part is arranged on the other of the fairing and the air intake duct. The connection part cooperates with the connection matching part so that the fairing can be detachably arranged at the air intake duct, and the fairing can be disassembled and assembled without opening the shell.

[0009] The gas meter rectifying device of the utility model is provided with a fairing on the air intake pipe of the gas meter, and the fairing is detachably arranged at the air intake pipe through a connecting structure, so that the fairing can be disassembled and assembled without opening the shell, which is convenient for disassembly and assembly of the fairing, effectively saving the internal space of the gas meter and reducing the cost. At the same time, when the fluid enters the gas meter through the air intake pipe, the fluid first passes through the air intake channel and then passes through the rectifying port. The fluid is restricted and guided by the rectifying port, thereby changing the flow path and velocity distribution of the fluid, so that the fluid entering the gas meter flows more evenly and stably, thereby improving the measurement accuracy.

[0010] In addition, the gas meter rectifier according to the utility model may also have the following additional technical features:

[0011] In some embodiments of the utility model, the connecting portion is arranged on the fairing, the connecting mating portion is arranged on the inner wall of the air intake duct, the connecting mating portion includes at least one avoidance groove cooperating with the connecting portion, and the avoidance groove extends along the length direction of the air intake duct to the upper end surface of the air intake duct.

[0012] In some embodiments of the utility model, the fairing includes a fairing body, the fairing body is cylindrical, the connecting portion is arranged on the outer circumferential surface of the fairing body, and the connecting portion is rotatably connected to the inner circumferential wall of the intake duct.

[0013] In some embodiments of the utility model, the connecting portion includes a clamping block, and the connecting mating portion also includes an annular clamping groove, which is arranged on the inner circumferential wall of the intake duct and is connected to the avoidance groove. The clamping block is inserted into the annular clamping groove through the avoidance groove and rotates relative to the inner circumferential wall of the intake duct to connect the fairing to the intake duct.

[0014] In some embodiments of the utility model, the air inlet passage is arranged along the length direction of the fairing body, one end of the air inlet passage is an open end, and the other end is a closed end, and the block is arranged at the open end.

[0015] In some embodiments of the utility model, there are two card blocks, which are symmetrically arranged at the open end, there are two avoidance grooves, which are both connected to the annular card groove, and the two avoidance grooves correspond one to one with the positions of the two card blocks.

[0016] In some embodiments of the present invention, the two blocks are arranged at the open end along the circumference of the fairing body and extend along the radial direction of the fairing body.

[0017] In some embodiments of the present invention, the two clamping blocks are an integral structure with the fairing body.

[0018] In some embodiments of the present invention, a plurality of the fairing ports are arranged at intervals on the circumferential surface of the fairing body, and the intervals between two adjacent fairing ports are the same.

[0019] Another aspect of the utility model provides a gas meter, comprising a valve assembly, a metering assembly and a gas meter rectifying device as described in any one of the above items, wherein the valve assembly and the metering assembly are arranged inside the shell, and the fairing is detachably arranged at the air intake pipe through the connecting structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0021] Figure 1 The cross-sectional view of the gas meter according to the embodiment of the utility model is schematically shown. Figure 1 ;

[0022] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0023] Figure 3 The structure diagram of the gas meter according to the embodiment of the utility model is schematically shown;

[0024] Figure 4 The structure diagram of the fairing of the gas meter rectifier device according to the embodiment of the utility model is schematically shown;

[0025] Figure 5 The structure diagram of the meter cover of the gas meter rectifying device according to the embodiment of the utility model is schematically shown;

[0026] Figure 6 for Figure 5 Enlarged view of point B in the middle.

[0027] The reference numerals are as follows:

[0028] 1. fairing; 10. fairing body; 100. air inlet passage; 101. fairing port; 102. closed end; 103. open end;

[0029] 20, connecting portion; 200, clamping block; 21, connecting matching portion; 210, avoidance groove; 211, annular clamping groove;

[0030] 3. Meter cover; 30. Air inlet pipe; 31. Air outlet pipe;

[0031] 4. Bottom shell;

[0032] 5. Valve assembly;

[0033] 6. Metering components. DETAILED DESCRIPTION

[0034] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0035] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0036] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0037] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both above and below orientations.

[0038] In the actual use of gas meters in related technologies, due to the existence of factors such as elbows, flow control valves, and pressure regulating devices, various fluctuations exist in the fluid, and the flow field is difficult to reach a stable state, which reduces the metering accuracy of the gas meter and affects the metering accuracy.

[0039] In view of this, the present embodiment provides a gas meter rectifying device, which aims to disassemble and assemble the rectifying cover 1 without opening the shell by detachably setting the rectifying cover 1 on the gas inlet pipe 30 of the gas meter, which is convenient for disassembly and assembly, effectively saves the internal space of the gas meter, and improves the accuracy of measurement, thereby solving the above technical problems.

[0040] like Figures 1 to 6 As shown, according to the embodiment of the utility model, a gas meter rectifying device is proposed, the gas meter includes a shell, an air intake pipe 30 is arranged on the shell, the gas meter rectifying device includes a fairing 1 and a connection structure, the fairing 1 is embedded in the air intake pipe 30, the fairing 1 is provided with an air intake channel 100, and the fairing 1 is provided with a plurality of rectifying ports 101, the rectifying ports 101 are communicated with the interior of the shell, the gas meter is installed on the gas pipeline, the gas flow first flows in through the air intake pipe 30, and then flows into the gas meter through the air intake channel 100 and the rectifying ports 101. The connection structure includes a connection part 20 and a connection matching part 21, the connection part 20 is arranged on one of the fairing 1 and the air intake pipe 30, the connection matching part 21 is arranged on the other of the fairing 1 and the air intake pipe 30, the connection part 20 cooperates with the connection matching part 21, so that the fairing 1 can be detachably arranged at the air intake pipe 30, and the fairing 1 can be disassembled and assembled without opening the shell.

[0041] The gas meter rectifying device of the utility model is provided with a fairing 1 on the air intake pipe 30 of the gas meter, and the fairing 1 is detachably provided at the air intake pipe 30 through a connecting structure, so that the fairing 1 can be disassembled and assembled without opening the shell, which is convenient for disassembly and assembly of the fairing 1, effectively saving the internal space of the gas meter and reducing the cost. At the same time, when the fluid enters the gas meter through the air intake pipe 30, the fluid first passes through the air intake channel 100 and then passes through the rectifying port 101. The fluid is restricted and guided by the rectifying port 101, thereby changing the flow path and velocity distribution of the fluid, so that the fluid entering the gas meter flows more evenly and stably, thereby improving the accuracy of measurement.

[0042] In some embodiments of the utility model, the connection part 20 is arranged on the fairing 1, and the connection matching part 21 is arranged on the inner wall of the air intake duct 30. The connection matching part 21 includes at least one avoidance groove 210 matched with the connection part 20, and the avoidance groove 210 extends to the upper end surface of the air intake duct 30 along the length direction of the air intake duct 30. Specifically, the avoidance groove 210 is arranged on the inner wall of the air intake duct 30 along the length direction of the air intake duct 30, and the avoidance groove 210 extends to the upper end surface of the air intake duct 30. When the fairing 1 is installed, the connection part 20 is inserted into the avoidance groove 210, so that the fairing 1 can be moved into the air intake duct 30 along the avoidance groove 210 to install the fairing 1. The fairing 1 can be disassembled and assembled without opening the shell, and the fairing 1 can be disassembled and assembled from the outside of the gas meter base meter without opening the base meter for operation, which is convenient for the installation and disassembly of the fairing 1.

[0043] In some embodiments of the present invention, the fairing 1 includes a fairing body 10 , which is cylindrical. The connecting portion 20 is arranged on the outer peripheral surface of the fairing body 10 , and the connecting portion 20 is rotatably connected to the inner peripheral wall of the intake duct 30 . Specifically, the connecting portion 20 is arranged on the outer peripheral surface of the fairing body 10, and the connecting fitting portion 21 is arranged on the inner peripheral wall of the intake duct 30. The fairing 1 can rotate relative to the inner wall of the intake duct 30, and the connecting portion 20 can be rotatably connected to the inner wall of the intake duct 30. When installing the fairing 1, the fairing 1 is placed into the intake duct 30 along the avoidance groove 210, and the fairing 1 is rotated to rotate the connecting portion 20 relative to the connecting fitting portion 21 to connect the connecting portion 20 with the connecting fitting portion 21, so that the fairing 1 and the intake duct 30 are switched from a separated state to a connected state. When disassembling the fairing 1, the fairing 1 is rotated to separate the connecting portion 20 from the connecting fitting portion 21, so that the fairing 1 and the intake duct 30 are switched from a connected state to a separated state.

[0044] In other embodiments, the cross-sectional shape of the fairing body 10 may also be set to be a rectangle, a square, or other irregular shapes.

[0045] In some embodiments of the utility model, the connection part 20 includes a clamping block 200, and the connection matching part 21 also includes an annular clamping groove 211, which is arranged on the inner peripheral wall of the air intake duct 30 and communicates with the avoidance groove 210. The clamping block 200 is clamped into the annular clamping groove 211 through the avoidance groove 210, and rotates relative to the inner peripheral wall of the air intake duct 30, so that the fairing 1 is connected to the air intake duct 30. The annular clamping groove 211 is communicated with the avoidance groove 210, and the avoidance groove 210 is adapted to the clamping block 200. When installing the fairing 1, place the protruding side of the block 200 in the avoidance groove 210, put the fairing 1 into the air intake duct 30, and slide the block 200 along the avoidance groove 210 toward the direction close to the annular groove 211. When the fairing 1 slides to the bottom of the avoidance groove 210, rotate the fairing 1 relative to the air intake duct 30 so that the block 200 is inserted into the annular groove 211. At this time, the fairing 1 and the air intake duct 30 are switched from a separated state to a connected state. When disassembling the fairing 1, rotate the fairing 1 so that the block 200 is removed from the annular groove 211. At this time, the fairing 1 and the air intake duct 30 are switched from a connected state to a separated state, which facilitates the disassembly and assembly of the fairing 1 and improves the disassembly and assembly efficiency.

[0046] In other embodiments, the connecting portion 20 may further include a first thread, which is arranged on the outer surface of the fairing body 10, and the connecting mating portion 21 may further include a second thread, which is arranged on the inner circumference of the intake duct 30 and cooperates with the first thread, so that the fairing 1 is threadedly connected to the intake duct 30.

[0047] In some embodiments of the utility model, the air inlet passage 100 is arranged along the length direction of the fairing body 10, one end of the air inlet passage 100 is an open end 103, and the other end is a closed end 102, and the block 200 is arranged at the open end 103. Specifically, the fairing body 10 is a cylindrical structure with an open end, and the air inlet passage 100 is formed inside, and the air inlet passage 100 is arranged along the axial direction of the fairing body 10, and the diameter of the air inlet passage 100 is the same at all places. In this embodiment, there are two blocks 200, which are arranged at the open end 103 and are symmetrically arranged. There are two avoidance grooves 210, and both avoidance grooves 210 are connected to the annular groove 211. The two avoidance grooves 210 correspond to the positions of the two blocks 200 one by one. The two blocks 200 are arranged at the open end along the circumference of the fairing body 10 and extend along the radial direction of the fairing body 10. The arrangement of the blocks 200 can improve the stability and reliability of the fairing 1 during installation.

[0048] In some embodiments of the present invention, the two blocks 200 and the fairing body 10 are an integrated structure, and the integrated structure can improve the overall strength of the fairing 1 and ensure the stability and reliability of the installation of the fairing 1.

[0049] In other embodiments, the two blocks 200 can also be set at any position of the open end 103 of the fairing 1, as long as the air intake channel 100, the fairing port 101 and the air intake duct 30 are interconnected. Correspondingly, the position of the annular groove 211 is adapted to the position of the block 200.

[0050] In other embodiments, the block 200 may also be set at the closed end 102 of the fairing 1, or respectively set at the closed end 102 and the open end 103. In addition, the number of blocks 200 may also be one or three, etc. Correspondingly, the number of annular grooves 211 is adapted to the number of blocks 200. If the number of blocks 200 is three or more, the block 200 may also be set at the closed end 102 and / or the open end 103 of the fairing 1.

[0051] In other embodiments, the air inlet passage 100 may also be configured to have a diameter that gradually increases or decreases from the closed end 102 to the open end 103 or in other forms.

[0052] In some embodiments of the utility model, a plurality of fairing ports 101 are arranged on the circumferential surface of the fairing body 10, and the spacing between two adjacent fairing ports 101 is the same. In this embodiment, the shapes of the plurality of fairing ports 101 are all rectangular, and the areas of the plurality of fairing ports 101 are the same. The plurality of fairing ports 101 are arranged on the fairing body 10 at intervals along the circumference of the fairing body 10, and the distance between two adjacent fairing ports 101 is the same. This distribution method can make the chaotic airflow pass through the fairing port 101 The fluid flows more evenly and stably, further improving the fairing effect of the fairing 1.

[0053] In other embodiments, the shape of the rectifying port 101 may also be circular, elliptical, regular hexagonal, or irregular. In addition, the number, area, and arrangement of the rectifying ports 101 may be arranged according to actual conditions and are not specifically limited here.

[0054] The second aspect of the utility model proposes a gas meter, including a valve assembly 5, a metering assembly 6 and the above-mentioned gas meter rectifier, wherein the fairing 1 is arranged at the air inlet pipe 30 and is detachably connected to the air inlet pipe 30 through a connecting structure. In this embodiment, the housing includes a bottom shell 4 and a meter cover 3, wherein the meter cover 3 is detachably arranged on the top of the bottom shell 4, the air inlet pipe 30 is arranged on the meter cover 3, and an air outlet pipe 31 is also arranged on the meter cover 3, the valve assembly 5 is arranged inside the bottom shell, and the orthographic projection of the valve assembly 5 overlaps with the orthographic projection of the air outlet pipe 31, and the metering assembly 6 is arranged inside the bottom shell 4, and the orthographic projection of the valve assembly 5 does not overlap with the orthographic projections of the air inlet pipe 30 and the air outlet pipe 31, thereby reducing the influence of the air flow on the metering of the metering assembly 6. Of course, the gas meter of this embodiment also has other structures and components that the existing gas meters have, and since these structures and components are not involved in this embodiment, they are not described in detail. When the fairing 1 is not installed, the airflow enters the air intake duct 30 and flows directly to the metering component 6. The airflow is rapid and the flow rate is unstable, which makes the airflow passing through the metering component 6 uneven, resulting in large errors in the metering results of the gas meter. As mentioned above, the utility model can solve this technical problem well by installing the fairing 1.

[0055] When installing the gas meter of the present invention, first install the valve assembly 5 and the metering assembly 6 inside the bottom shell 4, then fix the meter cover 3 on the bottom shell 4 by screws, and finally put the fairing 1 into the air intake pipe 30, slide along the avoidance groove 210 toward the direction close to the annular groove 211, and when the fairing 1 slides to the bottom of the avoidance groove 210, rotate the fairing 1 so that the two blocks 200 are inserted into the annular groove 211 for fixation, and the installation of the gas meter and the fairing 1 is completed.

[0056] by Figure 1 The utility model is explained as shown. When the gas meter is working, when the gas enters the gas meter through the air intake pipe 30, the gas first passes through the air intake channel 100, and then passes through the rectifier 101. The gas is restricted and guided by the rectifier 101, which can change the flow path and velocity distribution of the gas. The flow direction of the gas flow is extended, so that the chaotic air flow becomes a smooth, stable and uniform air flow after dispersing, so that the gas entering the gas meter flows more evenly and stably. After the uniform and consistent air flow enters the gas meter, it is metered by the metering component 6 to improve the accuracy of the metering, and finally flows through the valve component 5 and is discharged through the outlet pipe 31. The gas meter of the utility model is provided with a fairing 1 in the air intake pipe 30, and the fairing 1 is connected to the air intake pipe 30 through a connecting structure, which is convenient for the disassembly and assembly of the fairing 1, and effectively saves the internal space of the gas meter and reduces the cost.

[0057] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A gas meter rectifier, the gas meter comprising a housing, the housing being provided with an air intake pipe, characterized in that: The gas meter rectifier comprises: A fairing, used to be arranged on the air intake duct, the fairing is provided with an air intake channel, and the fairing is provided with a plurality of fairing ports, and the fairing ports are communicated with the interior of the shell; The connection structure includes a connection part and a connection matching part, wherein the connection part is arranged on one of the fairing and the air intake duct, and the connection matching part is arranged on the other of the fairing and the air intake duct. The connection part cooperates with the connection matching part so that the fairing can be detachably arranged at the air intake duct, and the fairing can be disassembled and assembled without opening the shell.

2. The gas meter rectifier device according to claim 1, characterized in that: The connecting portion is arranged on the fairing, the connecting fitting portion is arranged on the inner wall of the air intake duct, the connecting fitting portion includes at least one avoidance groove matched with the connecting portion, and the avoidance groove extends along the length direction of the air intake duct to the upper end surface of the air intake duct.

3. The gas meter rectifier device according to claim 2, characterized in that: The fairing comprises a fairing body, which is cylindrical. The connecting portion is arranged on the outer peripheral surface of the fairing body, and the connecting portion is rotatably connected to the inner peripheral wall of the air intake duct.

4. The gas meter rectifier device according to claim 3, characterized in that: The connecting portion includes a clamping block, and the connecting mating portion also includes an annular clamping groove, which is arranged on the inner circumferential wall of the air intake pipe and is connected to the avoidance groove. The clamping block is inserted into the annular clamping groove through the avoidance groove and rotates relative to the inner circumferential wall of the air intake pipe to connect the fairing to the air intake pipe.

5. The gas meter rectifier device according to claim 4, characterized in that: The air inlet passage is arranged along the length direction of the fairing body, one end of the air inlet passage is an open end, and the other end is a closed end, and the block is arranged at the open end.

6. The gas meter rectifier device according to claim 5, characterized in that: There are two clamping blocks, which are symmetrically arranged at the open end. There are two avoidance grooves, which are both connected to the annular clamping groove. The two avoidance grooves correspond to the positions of the two clamping blocks one by one.

7. The gas meter rectifier device according to claim 6, characterized in that: The two blocks are arranged at the open end along the circumference of the fairing body and extend along the radial direction of the fairing body.

8. The gas meter rectifying device according to claim 7, characterized in that: The two clamping blocks and the fairing main body are an integral structure.

9. The gas meter rectifying device according to claim 3, characterized in that: The plurality of fairing ports are arranged at intervals on the peripheral surface of the fairing body, and the intervals between two adjacent fairing ports are the same.

10. A gas meter, characterized in that: It comprises a valve assembly, a metering assembly and a gas meter rectifying device as claimed in any one of claims 1 to 9, wherein the valve assembly and the metering assembly are arranged inside the shell, and the fairing is detachably arranged at the air intake pipe through the connecting structure.

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