Flow Path Adapter

Abstract

To provide a flow path adapter for a flow rate measurement unit with dust collection and rectification effects.SOLUTION: A flow path adapter 10 attached to an inlet 21 of a flow rate measurement unit 20 for introducing a fluid to be measured into the flow rate measurement unit 20, includes in its interior: a flow path 11 through which the fluid to be measured flows; and a plurality of ribs 15 provided in the flow path 11 so that the fluid to be measured introduced into the flow path 11 collides with. The flow path adapter is mounted so as to cover the inlet 21 of the flow rate measurement unit 20.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a flow path adapter that is attached to an inlet of a flow measurement unit. [Background technology]

[0002] Patent Document 1 discloses a flow rate measurement unit equipped with a chamber at an inlet. In this flow rate measurement unit, the chamber has a function of rectifying the flow of the fluid to be measured, thereby improving the measurement accuracy. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2013-186032 A Summary of the Invention [Problem to be solved by the invention]

[0004] The present disclosure provides a flow path adapter that, when attached to the inlet of a flow measurement unit, can rectify the flow of the fluid to be measured and collect dust contained in the fluid to be measured, thereby stabilizing the measurement accuracy of the flow measurement unit. [Means for solving the problem]

[0005] The flow channel adapter in the present disclosure includes a flow channel provided inside a main body through which a fluid to be measured flows, and a plurality of ribs provided in the flow channel so that the fluid to be measured introduced into the flow channel collides with the ribs. From the upstream side It is worn to cover. Effect of the Invention

[0006] The flow path adapter of the present disclosure rectifies the flow of the fluid to be measured flowing into the flow rate measurement unit by using ribs provided in the flow path through which the fluid to be measured flows, and can collect dust contained in the fluid to be measured by colliding it with the ribs. This stabilizes the measurement accuracy of the flow rate measurement unit and can remove dust contained in the fluid to be measured, thereby preventing dust from adhering to the measurement flow path of the flow rate measurement unit and maintaining the required measurement accuracy for a long period of time. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a perspective view of a flow path adapter according to a first embodiment; [Diagram 2] AA cross-sectional view of the flow path adapter according to the first embodiment. [Diagram 3] FIG. 1 is a cross-sectional view showing a state in which the flow path adapter according to the first embodiment is attached to a flow rate measurement unit. [Figure 4] FIG. 1 is a diagram showing a state in which the flow path adaptor according to the first embodiment is attached to a flow rate measurement unit. [Diagram 5] FIG. 13 is a perspective view showing a method for attaching the flow path adapter to the flow rate measurement unit according to the first embodiment. [Figure 6] FIG. 1 is a cross-sectional view showing a state in which a flow rate measurement unit to which a flow path adapter according to a first embodiment is attached is mounted on a gas meter. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] (The knowledge and other information that formed the basis of this disclosure) At the time when the inventors came up with the idea of ​​the present disclosure, when measuring the flow rate of gas with a flow rate measuring unit built into a gas meter, the gas flowing in from the inlet of the gas meter was directly input to the flow rate measuring unit. When such a flow measuring unit is introduced into a flow measuring device, there is a problem that the gas flow is disturbed and stable flow measurement is not possible. Therefore, various configurations have been disclosed for rectifying the flow of the measured fluid flowing into the flow measuring unit.

[0009] On the other hand, gas meters are required to satisfy prescribed dust tests on the assumption that the gas being measured contains dust. To address this, filters to remove dust and structural innovations to capture dust have been necessary.

[0010] However, solving these two problems requires adding the necessary components, which results in increased costs.

[0011] Therefore, the present disclosure provides a flow path adapter that can simultaneously achieve flow straightening and dust countermeasures and reduce cost increases.

[0012] Hereinafter, the embodiments will be described in detail with reference to the drawings. However, more detailed explanation than necessary may be omitted. For example, detailed explanation of already well-known matters or duplicate explanation of substantially the same configuration may be omitted. This is to avoid the following explanation becoming more redundant than necessary and to facilitate understanding by those skilled in the art.

[0013] It should be noted that the accompanying drawings and the following description are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

[0014] (Embodiment 1) Hereinafter, the first embodiment will be described with reference to FIGS.

[0015] [1-1. Flow path adapter configuration] Fig. 1 is a perspective view of the flow path adaptor of this embodiment, Fig. 2 is an AA cross-sectional view of Fig. 1, and Fig. 3 shows a state in which a flow measurement unit is attached together with the AA cross-sectional view of Fig. 1. The flow path adaptor has a symmetrical shape with respect to the AA cross-section, and in the following explanation, the structure of the flow path adaptor will be explained with reference to Fig. 2.

[0016] 1 to 3, a flow path adapter 10 is provided with a flow path 11 for introducing gas in a gas meter into an inlet 21 of a flow measurement unit 20. The flow path 11 has introduction flow paths 12a to 12e as gas inlets, and the inside is divided by three partition plates 13 to form flow paths from the introduction flow paths 12a to 12e to the inlet 21 of the flow measurement unit 20.

[0017] The introduction flow passage 12e is open only at the inlet 121e through which the gas flows in, while the introduction flow passages 12a to 12d are open at the inlets 121a to 121d through which the gas flows in, and also have openings 122a to 122d in parts of the flow passages. amount Measurement Unit 20 When the filter is attached to the filter, it is blocked and a flow path is formed.

[0018] Furthermore, in the flow path 11, a plurality of ribs 15 of different heights are provided on the inner wall 14 and the wall surface of the partition plate 13 that constitute the flow path. The ribs 15 are arranged at intervals so that the heights of adjacent ribs 15 are different, and further, grooves 15a are provided in the ribs 15 that are relatively tall. The ribs 15 may also be provided in the introduction flow paths 12a to 12e.

[0019] The flow rate measurement unit 20 to which the flow path adapter 10 is attached includes an inlet 21 through which gas, which is the fluid to be measured, a measurement flow path 24 in which a sensor (not shown) for measuring the flow rate is disposed, an outlet 22 which is an outlet for the gas, and a controller unit 23 which controls the sensor to measure the flow rate. It has.

[0020] 3, the flow path adaptor 10 is attached so as to cover the inlet 21 of the flow measurement unit 20. Then, the openings 122a-122d of the introduction flow paths 12a-12d are blocked by an outer wall forming the measurement flow path 24 of the flow measurement unit 20, thereby forming a flow path. As a result, the gas flows from the inlets 121a-121e of the introduction flow paths 12a-12e into the flow path 11 in the flow path adaptor 10 through the routes indicated by dotted lines Fa, Fb, and Fc, and is led to the inlet 21 of the flow measurement unit 20.

[0021] 4(a) to 4(d) are views taken along arrows B, C, D, and E in FIG. 3, respectively, and indicate the gas flow with outline arrows. In FIG. 4, a part (half) of the flow path adapter 10 is shown with dotted lines to show the internal structure such as ribs 15. As shown in FIG. 4, gas flows into each introduction flow path from the periphery of the flow measurement unit 20.

[0022] FIG. 5 shows a method of attaching the flow path adapter 10 to the flow rate measurement unit 20. The flow path adapter 10 is divided in the center into two parts. Body 1 0a, Book Body 1 0b is molded from resin. Body 1 0a, Book Body 1 0b is substantially symmetrical and is attached to the left and right sides of the inlet 21 of the flow rate measurement unit 20, and functions as a flow path adapter 10 together. Body 1 0a, Book Body 1 The joining method of 0b may be appropriately selected from mechanical fixing such as screws or snap fitting, and adhesive.

[0023] Needless to say, the partition plate 13 and ribs 15 formed inside the flow path adapter 10 are formed so as not to interfere with the flow measurement unit 20, but a gap is provided large enough to hold the flow path adapter 10, and further, the notches 16 provided in the introduction flow paths 12a, 12b fit into the ribs 25 of the flow measurement unit 20, thereby ensuring positioning and fixation.

[0024] Furthermore, although not shown in FIGS. 1 to 4, the surface of the flow channel adapter 10 has a Groove The recessed and protruding portions 17, 18, and 19 are provided.

[0025] Also, this Body 1 0a, Book Body 1 The partition plate 13, ribs 15, introduction flow paths 12a-12e, and uneven portions 17-19 formed inside 0b are configured so that they can be removed from the mold from one direction when the resin is molded. Although part of the side wall of the introduction flow paths 12a-12e is formed to be open, when the flow path is attached to the flow rate measurement unit 20, it is blocked by the outer wall of the measurement flow path 24 of the flow rate measurement unit 20, so that it functions as an independent flow path, and there is no problem.

[0026] FIG. 6 shows a cross-sectional view of a gas meter in which a flow rate measurement unit 20 equipped with a flow path adapter 10 according to the present embodiment is mounted.

[0027] 6(a), the gas meter 30 is provided with a gas inlet 32 ​​and a gas outlet 33 in a housing 31 having an internal space 36, the inlet 32 ​​is provided with a shutoff valve 35 that shuts off the gas in the event of an abnormality, and the outlet 33 is connected to an internal pipe 34. The flow rate measurement unit 20 is disposed horizontally with respect to the gas meter 30, and the outlet 22 of the flow rate measurement unit 20 is connected and fixed to the internal pipe 34.

[0028] The gas flowing in from the inlet 32 ​​passes through the shutoff valve 35 and reaches the internal space 36, where it diffuses as shown by the white arrows, and then flows around from the direction of the internal piping 34 to reach the inlet channels 12a to 12e of the channel adapter 10.

[0029] In FIG. 6(b), the gas meter 40 is provided with a housing 41 having an internal space 46, and a gas inlet A gas inlet 42 and a gas outlet 43 are provided, and a shutoff valve 45 that shuts off the gas in the event of an abnormality is connected to the inlet 42. The flow rate measurement unit 20 is disposed vertically to the gas meter 40, and the flow outlet 22 of the flow rate measurement unit 20 is connected and fixed to the outlet 43.

[0030] The gas flowing in from the inlet 42 passes through the shutoff valve 45 and reaches the internal space 46, where it diffuses as indicated by the white arrows, and then flows around from above the internal space 46 to reach the inlet flow paths 12a to 12e of the flow path adapter 10.

[0031] [1-2. Function of the flow channel adapter] The operation of the flow path adaptor 10 configured as above will now be described.

[0032] As shown in FIG. 3, the gas flowing into the flow path adapter 10 collides with the ribs 15 provided on the flow path 11 and the introduction flow paths 12a to 12e, and flows in a meandering manner to reach the inlet 21 of the flow measurement unit 20, as shown by the dotted lines Fa, Fb, and Fc.

[0033] The action at that time will be described in detail below by taking the flow indicated by the dotted line Fc as an example. When the gas contains dust, the gas collides with the ribs 15, causing the dust to be captured by the ribs as it flows, and the dust in the gas is gradually removed by the multiple ribs on the way to the inlet 21 of the flow rate measuring unit 20.

[0034] In this embodiment, the ribs 15 having a certain height are provided with the grooves 15a, so that the dust particles in the gas can be efficiently collected by the grooves 15a.

[0035] In addition, the meandering gas flow creates a straightening effect, homogenizing the gas flow entering the flow rate measuring unit, enabling stable measurement. vinegar In this way, stable measurement can be performed regardless of the orientation of the flow rate measuring unit 20.

[0036] [1-3. Effects of flow path adapters, etc.] As described above, in this embodiment, the flow path adapter 10 is attached to the inlet 21 of the flow measurement unit 20, and the flow path adapter 10 is for introducing the measured fluid, that is, gas, into the flow measurement unit 20. The flow path adapter 10 has a flow path 11 provided inside the main body through which the measured fluid flows, and a plurality of ribs 15 provided within the flow path 11 so that the measured fluid introduced into the flow path 11 collides with the ribs 15, and is attached so as to cover the inlet 21 of the flow measurement unit 20.

[0037] This makes it possible to collect dust contained in the fluid to be measured, and furthermore, due to the flow straightening effect, the flow rate measuring unit 20 can perform stable flow rate measurement.

[0038] Also, as in this embodiment, the rib 15 may have a groove 15a on the surface with which the fluid to be measured collides.

[0039] This improves the performance of collecting dust contained in the fluid to be measured.

[0040] Furthermore, as in this embodiment, the flow path 11 may have introduction flow paths 12a to 12e for the fluid to be measured, and the inlets of the introduction flow paths 12a to 12e may extend in the opposite direction to the flow direction into the flow rate measuring unit 20.

[0041] As a result, the flow path in the flow path adapter 10 becomes longer, the dust collecting ability in the measured fluid is improved, and the flow straightening effect is improved. When attached to a flowmeter, stable flow measurement is possible regardless of the attachment direction. Moreover, by providing ribs 15 also in the inlet passages 12a to 12e, the dust collecting capacity is further improved.

[0042] Furthermore, as in this embodiment, the introduction channels 12a to 12e may be disposed along the periphery of the measurement channel 24 of the flow rate measurement unit 20.

[0043] This allows the flow path adaptor 10 to be made compact, and the gas meter to which the flow rate measurement unit 20 having the flow path adaptor 10 attached thereto is attached can also be made compact.

[0044] Furthermore, like in this embodiment, when the introduction channels 12a to 12e are attached to the flow rate measurement unit 20, a part of each of them may be formed by the outer wall (outer peripheral surface) of the measurement channel of the flow rate measurement unit 20.

[0045] As a result, the flow path adapter 10 Body 1 0a, Book Body 1 When molding 0b from resin, even if a portion of the inlet flow paths 12a to 12e (the surface facing the flow path adapter 10) is molded open, this open surface is blocked by the outer wall (outer peripheral surface) of the measurement flow path when the flow path measuring unit is attached, so that the flow path can still function.

[0046] Moreover, as in this embodiment, the introduction channels 12a to 12e may be divided into a plurality of channels.

[0047] This makes it possible to increase the area with which the fluid to be measured comes into contact before it reaches the inlet 21 of the flow rate measuring unit 20, thereby improving the dust collecting capacity.

[0048] In addition, as in the present embodiment, the flow channel adapter 10 is divided into two main bodies (main body Body 1 0a, Book Body 1 0b) and the divided body (book Body 1 0a, Book Body 1 0b) may be coupled to the flow inlet 21 of the flow rate measurement unit 20 so as to be attached to cover the inlet 21.

[0049] This will Body 1 0a, Book Body 1 0b can be easily molded by resin molding, and can be easily attached to the flow rate measurement unit 20.

[0050] It should be noted that the above-described embodiments are intended to illustrate the technology of the present disclosure, and various modifications, substitutions, additions, omissions, and the like can be made within the scope of the claims or their equivalents. [Industrial Applicability]

[0051] The present disclosure is applicable to a flow rate measurement unit used in a gas meter that measures the flow rate of a gas containing dust as a measured fluid. [Explanation of symbols]

[0052] 10 Flow path adapter 11 Flow Path 12a, 12b, 12e Inlet flow channels 13 Partition 14 Inner wall 15 Ribs 16 Notch 17, 18, 19 Uneven part 20 Flow Measuring Unit 21 Inlet 22 Outlet 23 Controller section 24 Measurement flow path 25 Ribs 30, 40 Gas meter

Claims

1. A flow path adapter that is attached to an inlet of a flow rate measurement unit and introduces a measured fluid into the flow rate measurement unit, a flow path provided inside the main body through which a fluid to be measured flows; a plurality of ribs provided in the flow path so that the fluid to be measured introduced into the flow path collides against the ribs; Equipped with a flow path adapter that is attached so as to cover the inlet of the flow rate measurement unit from the upstream side;

2. 2. The flow path adaptor according to claim 1, wherein the rib has a groove on a surface with which the fluid to be measured collides.

3. the flow path has an inlet flow path for the fluid to be measured, 3. The flow path adaptor according to claim 1, wherein the inlet of the introduction flow path extends in a direction opposite to a direction of flow into the flow rate measurement unit.

4. The flow path adaptor according to claim 3 , wherein the introduction flow path is disposed along a periphery of the measurement flow path of the flow rate measurement unit.

5. 5. The flow path adaptor according to claim 4, wherein a portion of the introduction flow path is formed by an outer circumferential surface of the flow rate measurement unit when the flow path adaptor is attached to the flow rate measurement unit.

6. 6. The flow channel adaptor according to claim 3, wherein the inlet flow channel is divided into a plurality of channels.

7. The flow path adapter according to any one of claims 1 to 6, characterized in that it is divided into two main bodies, and by combining the divided main bodies, it is attached so as to cover the inlet of the flow measurement unit from the upstream side.

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