JPH04124419U - fluidic gas meter - Google Patents

Abstract

(57) [Summary] [Purpose] Even if the straight pipe section of the gas supply piping connected immediately upstream of the gas meter is short, the instrumental error characteristics will not change due to disturbances in the flow velocity distribution flowing into the fluidic element section. Make it. [Structure] A shutoff valve part 4, a rectifier part 6, a fluidic element part 3, and a meter outlet 5 are arranged in order from the meter inlet 2.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to improvements in fluidic gas meters.

0002

[Conventional technology]

A safety device with a shutoff valve built into the gas meter that blocks the passage of gas in an emergency. As shown in Figure 2, a fluidic gas meter with a The gas flowing in from the meter inlet 2 as shown by arrow A flows through the fluidic element section 3 and the shutoff valve. The structure was such that the flow occurred in the order of section 4 and meter outlet 5.

0003 In Figure 2, the internal structure of the meter can be seen by removing the lid attached to case 1. FIG.

0004

[Problem that the idea aims to solve]

In the above conventional technology, the fluidic element section 3 is connected immediately downstream of the meter inlet 2. Due to the continuous flow path configuration, the straight pipe of the gas supply piping is connected immediately upstream of the meter. If the section is short, the shape of the upstream gas supply pipe may cause the gas to flow into the fluidic element section. The flow velocity distribution is different, and due to this influence, the fluid vibration of the fluidic element is not normal. The relationship between flow rate and vibration frequency (frequency) may change, resulting in instrumental error characteristics. The problem was that it changed.

[0005] To avoid such adverse effects from upstream gas supply piping conditions, It is best to install a sufficiently long straight pipe section in the supply piping, but if you do so, you will need to install a gas meter. There were problems such as restrictions on the This invention is a fluidic gas meter with a safety function that can solve these problems. The purpose is to provide

[0006]

[Means to solve the problem] In order to achieve the above purpose, the fluidic gas meter of this invention In order from the inlet (2), the shutoff valve section (4), the rectifier section (6), and the fluidic element section ( 3), the meter outlet (5) was arranged.

[0007]

[Effect]

The flow at the meter inlet may be affected by differences in piping conditions such as bends in the gas supply piping upstream of the meter. Even if the state of the keep. This constant turbulence is corrected by a rectifier installed on the downstream side and is fluidic. Flows into the element section. Therefore, the fluid vibration (oscillation) of the fluidic element can be kept stable. dripping

[0008]

【Example】

In the embodiment shown in Fig. 1, the lid originally attached to case 1 is removed and the gas meter is installed. 2 is a plan view showing the internal structure of case 1, 2 is the meter inlet provided in case 1, 4 is 6 is a safety function cutoff valve installed immediately downstream of the meter inlet 2, and 6 is a cutoff valve for the safety function provided immediately downstream of the meter inlet 2. Case 1 Consists of rectifying members such as nets and honeycombs installed over the entire width of the left and right sides of the has been done. 3 is a fluidic element section, which is disposed downstream of the rectifying section 6, and is A meter outlet 5 is provided downstream of the Idic element section.

[0009] 3a is the entrance of the fluidic element section, which is located along the left and right width of the net that constitutes the rectifying section 6. It is narrow in comparison. As mentioned above, compared to the conventional technology, the present invention uses a fluidic element for the rectifying section 6. The point is that it is additionally provided immediately upstream of section 3, and furthermore, a shutoff valve section 4 is arranged on the upstream side. different.

0010

[Effect of the idea]

Since the fluidic gas meter of the present invention is constructed as described above, The fluid vibration (oscillation) of the Luidic element can be kept stable, and the upstream gas supply Implemented a fluidic gas meter with a safety function whose instrumental error characteristics are not affected by differences in piping. can be expressed.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention with a lid removed.

FIG. 2 is a plan view showing a state in which a lid of the prior art is removed.

[Explanation of symbols]

1 case 2 Meter entrance 3 Fluidic element section 4 Shutoff valve part 5 Meter entrance 6 Rectifier section

──────────────────────────────────────────────── ─── Continuation of front page (71) Applicant 000142425 Kinmon Seisakusho Co., Ltd. 1-2-3 Shimura, Itabashi-ku, Tokyo (71) Applicant 000156813 Kansai Gas Meter Co., Ltd. 2-10-16 Higashi Kobashi, Higashinari Ward, Osaka City, Osaka Prefecture (72) Creator Takashi Ueki 1-11-3 Minamikugahara, Ota-ku, Tokyo (72) Creator Katsuto Sakai 20-9 Senjuyanagicho, Adachi-ku, Tokyo (72) Creator Shigenori Okamura 4-1-2 Hiranocho, Chuo-ku, Osaka Osaka Inside Gas Co., Ltd. (72) Creator Tadayuki Minami 4-1-2 Hiranocho, Chuo-ku, Osaka Osaka Inside Gas Co., Ltd. (72) Creator Yasuo Sato Toho Gas Co., Ltd. 507-2 Shinpocho, Tokai City, Aichi Prefecture Inside Shikisha General Technology Research Institute (72) Creator Koichi Yasuda Toho Gas Co., Ltd. 507-2 Shinpocho, Tokai City, Aichi Prefecture Inside Shikisha General Technology Research Institute (72) Creator Hirokazu Kanda 1-2-70 Sennen, Atsuta-ku, Nagoya, Aichi Prefecture Within Aichi Tokei Denki Co., Ltd. (72) Creator Hideyuki Oike 1-2-3 Shimura, Itabashi-ku, Tokyo Co., Ltd. Inside the company Kinmon factory (72) Creator Tadao Shibuya Kansai, 2-10-16 Higashikobashi, Higashinari-ku, Osaka Within Gas Meter Co., Ltd.

Claims (2)

[Scope of utility model registration request] Claim 1: In order from the meter inlet (2), a shutoff valve section (4), a rectifier section (6), a fluidic element section (3),
A fluidic gas meter with an array of meter outlets (5). 2. The fluidic gas meter according to claim 1, wherein the rectifying section (6) is constituted by a rectifying member disposed across the flow path and across the entire width of the meter case (1).