JPS5829658U

JPS5829658U - Pressure reducing valve for cold regions

Info

Publication number: JPS5829658U
Application number: JP12220281U
Authority: JP
Inventors: 紀生小泉
Original assignee: 株式会社光合金製作所
Priority date: 1981-08-19
Filing date: 1981-08-19
Publication date: 1983-02-25
Also published as: JPS5920461Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来寒冷地で使用されている減圧弁の縦断面で
あり、第２図は本考案の基本的構成を示す縦断面図であ
り、第３図は本考案の一実施例を示す縦断面図であり、
第４図、第５図はそれぞれ第３図のＡ−Ａ断面図、Ｂ方
向から見た一次側シリンダ部分の平面図であり、第６図
は本考案の他の実施例を示す部分縦断面図であり、第７
図、第８図、第９図はそれぞれ第６図のＣ−Ｃ断面図、
ｄ−ｄ断面図およびｅ方向から見た平面図であり、第１
０図は第６図における二次側真空破壊弁部分の他の実施
例を示す縦断面図であり、＠１１図は本考案のもう一つ
の実施例を示す部分縦断面図である。１・・・・・・弁本体、１′・・・・・・弁本体上部、
２・・・・・・流入口、３・・・・・・流出口、４・・
・・・・導水路、５・・・・・・排水口、６・・・・・
・排水路、７〜１３・・・・・・シリンダ部、１４．１
５，１６，１７，１９．２０．２１・・・・・・リング
状パツキン、１８・・・・・・−次側ピストン、２２・
・・・・・二次側ピストン、２８・・・・・・受圧室、
２９・・・・・・バネ室、３０−−−−−−バネ、３４
・・・・・・ストレーナ−１３５，４２，４６・・・・
・・弁座、３６．４０゜７１・・・・・・・・・バネ、
３７．４３・・・・・・パツキン、３８・・・・・・逃
し弁体、４１・・・・・・チェック弁体、４５・・四速
通孔、４７・・・・・・吸気弁体、６３・・・・・・ダ
イヤフラム、６９・・・・・・逆止弁体。Fig. 1 is a vertical cross-section of a pressure reducing valve conventionally used in cold regions, Fig. 2 is a longitudinal cross-section showing the basic configuration of the present invention, and Fig. 3 is a longitudinal cross-section showing an embodiment of the present invention. It is a longitudinal cross-sectional view,
4 and 5 are a sectional view taken along the line A-A in FIG. 3 and a plan view of the primary cylinder section viewed from direction B, respectively, and FIG. 6 is a partial longitudinal section showing another embodiment of the present invention. Figure 7
Figures 8 and 9 are sectional views taken along line C-C in Figure 6, respectively.
dd sectional view and a plan view seen from the e direction;
Figure 0 is a vertical cross-sectional view showing another embodiment of the secondary vacuum breaker valve portion in Figure 6, and Figure @11 is a partial vertical cross-sectional view showing another embodiment of the present invention. 1... Valve body, 1'... Upper part of the valve body,
2... Inlet, 3... Outlet, 4...
...Conduit, 5...Drainage port, 6...
・Drainage channel, 7-13...Cylinder part, 14.1
5, 16, 17, 19.20.21...Ring-shaped packing, 18...-Next piston, 22.
...Secondary side piston, 28...Pressure receiving chamber,
29... Spring chamber, 30--- Spring, 34
...Strainer-135, 42, 46...
...Valve seat, 36.40°71... Spring,
37.43...Packskin, 38...Relief valve element, 41...Check valve element, 45...Four speed hole, 47...Intake valve Body, 63...Diaphragm, 69...Check valve body.

Claims

[Scope of utility model registration request]

(1) The valve body has two rows of cylinders with the lower end open and a drain port.The side wall of the valve body has an inlet and an outlet, a conduit is in the middle, and a secondary water supply is provided between the outlet and the drain. A drainage channel is provided in each cylinder, and the upstream cylinder of the cylinder is operated by a manual handle or the driving force of a motor to open and close the passage between the inlet and the water conduit, and the outlet and the drain. The primary piston, which has several ring-shaped packings, and the downstream cylinder automatically move up and down in response to fluctuations in secondary pressure, changing the flow area of the passage between the headrace and the outlet. A secondary piston with a required number of ring-shaped gaskets for blocking the passage is inserted, and a chamber provided in the upper part of the downstream cylinder is formed by a ring-shaped gasket or diaphragm attached to the secondary piston. A pressure reducing valve for cold regions that is divided into two parts, with a pressure receiving chamber on the lower side and a spring chamber on the upper side that accommodates a spring that can be adjusted freely to apply a pressing force to the secondary piston.

(2) The above-mentioned upstream cylinder is divided into two parts, and a cylindrical strainer is attached to the lower end of the upper cylinder corresponding to the inlet to connect both the upper and lower cylinders. The pressure reducing valve for cold regions according to item 1.

(3) A check valve body is provided in the passage between the inlet and the water conduit, which is lightly pressed against the valve seat by a spring to form a check valve, and the check valve is forced by the vertical or rotational movement of the primary piston during drainage. The pressure reducing valve for cold regions according to claim 1, wherein the check valve element is automatically removed from the valve seat.

(4) A communication hole is provided in the above piston from the inflow port to the drain port, and the communication hole normally contacts the valve seat to prevent primary water from entering the drain port. The pressure reducing valve for cold regions according to claim 1, which forms a vacuum breaker valve on the primary side by inserting an intake valve body that communicates with the drain port when negative pressure is generated on the side.

(5) In order to operate at a pressure slightly higher than the set secondary pressure in the drainage channel, a relief valve is provided that is normally pressed by a spring and closes the valve seat to form a safety valve, and when draining, the secondary piston The pressure reducing valve for cold regions according to claim 1, wherein the relief valve body is forcibly separated from the valve seat to discharge secondary water.

(6) A check valve body is provided in the drainage channel to prevent secondary water from entering the drain at all times, and to communicate with the drain when negative pressure is generated on the secondary side. The refrigeration system according to claim 1, which is a utility model, is formed with a vacuum breaker valve, and is configured to forcibly operate the check valve body by a primary piston during drainage to discharge secondary water. Ground pressure reducing valve.

(7) A primary water drainage path is provided between the inlet and the drainage port separately from the drainage path, and the primary piston is actuated by the operation of a manual handle or the driving force of a motor.
A pressure reducing valve for cold regions according to claims 1 to 6, which opens a drainage channel on the next side and discharges not only secondary water but also primary water from the drainage port at the same time.