CN2069515U

CN2069515U - Leading diaphragm type stop valve

Info

Publication number: CN2069515U
Application number: CN 89221767
Authority: CN
Inventors: 范瑾
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-12-27
Filing date: 1989-12-27
Publication date: 1991-01-16

Abstract

The utility model relates to a leading diaphragm sheet type stop valve, which is a two-level and two-way valve with a new structure. A decompression device is driven by light action force to be a leading control by using a hand (or gas, liquid or electric). A pressure source in the same pipeline is uniformly used by the leading control and a main valve. The pipeline controlled by the leading control is thiner, a small displacement is moved by little action force, and the leading control controls the flow capacity to play a leading role to cause the pressure difference is formed in the inner of the main valve. The diaphragm sheet of the main valve is driven to open and close a main current circuit. Compared with the existing stop valve, the utility model has the advantages of labor saving, and short time of opening and closing, and when a special accident occur to a pipeline, the leading diaphragm sheet type stop valve can quickly achieve opening and closing.

Description

Leading diaphragm type stop valve

The invention relates to the invention of the stop valve of fluid control usefulness.

The open and close of existing stop valve all rely on manually or other control systems, be to utilize external force to implement the switch of valve, their steering forces are big, especially to big latus rectum stop valve, it is time-consuming again to open and close effort, can not accomplish to close fast and open when pipeline breaks down, these shortcomings are problems anxious to be solved.

The objective of the invention is: provide a kind of simple in structure, open or close fast, laborsaving, mainly rely on internal pipe pressure to implement the stop valve of the handiness open and close.

Its solution is: adopt manually or pressure relief device that other external force (gas, liquid) drive is guide's diaphragm type 2/2-way stop valve structure.Guide's pilot pressure and main valve all use the pressure source in the same pressure piping, and the pipe diameter in guide's pilot pressure source is thinner, thereby guide's control force is also less, rely on little active force, the leading role of controlling a small flow conducting (pressure release) or turn-offing, cause the inner pressure reduction that produces of diaphragm type main valve, utilize pipeline fluid pressure-driven diaphragm with main valve open or close.

In order to implement quick pass, to open, can also take multistage guide's way to control for the king-sized valve of latus rectum.

Accompanying drawing has been described embodiments of the invention, they are structural representations, these five kinds of approximate structural types are represented by Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 respectively, their working principle is identical, for sake of convenience, only just Fig. 1 elaborates, and all the other four figure only emphatically point out the structure difference with Fig. 1.

Fig. 1 represents first kind of five kinds of structural types of type pilot diaphragm type stop valve, and spring (5), Small diaphragm-piece (6), pressure relief opening (7), chamber (8), knob (9), leak-off pipe (10) constitute manual pressure relief device.Chamber (4), fluid pressure source (1), big diaphragm (12), chamber (13), primary flow path output nozzle (15), chamber (16) and primary flow path output terminal (14) constitute main valve, big diaphragm (12) is sandwiched between chamber (4) and the chamber (13), fluid pressure source (1) connects chamber (13), and primary flow path output terminal (14) connects chamber (16).Its working principle is as follows:

Under the normality, Small diaphragm-piece (6) is pushed to the top by spring (5), relief port (7) is sealed, entering pressure source flow tube (2) from fluid pressure source (1) is cut off to the path of leak-off pipe (10), have only by inlet opening (11) to be full of chamber (4), it is downward to form guide's big diaphragm of pilot pressure rear driving (12), and primary flow path is exported nozzle (15) sealing, cut off the path of fluid pressure source (1) and chamber (16), the no fluid output of primary flow path output terminal (14) at this moment.

When with hand or other external force with knob (9) rotation direction below, it is downward to promote Small diaphragm-piece (6), import (3) is sealed, at this moment fluid pressure source (1) is cut off by the path that pressure source flow tube (2) enters chamber (4), fluid in the chamber (4) is through import (11), pressure relief opening (7), chamber (8), flow to leak-off pipe (10), row is to primary flow path output terminal (14), at this moment the pressure in the chamber (4) reduces, the big diaphragm of pressure-driven (12) in the chamber (13) upwards, primary flow path output nozzle (15) promptly is opened, fluid pressure source (1) is opened to the path of primary flow path output terminal (14), at this moment fluid is through chamber (13), primary flow path output nozzle (15), chamber (16) flows to primary flow path output terminal (14), and at this moment valve is on state.

From above-mentioned principle as can be known,, walk one section little displacement and just can play guide's effect, utilize pressure reduction main valve open as long as Small diaphragm-piece (6) top lower seal is lived in mouthful (3) with knob (9); Otherwise knob (9) upwards revolves, and spring (5) resets Small diaphragm-piece (6), with relief port (7) sealing, chamber (4) is boosted, and drives big diaphragm (12) and primary flow path is exported nozzle (15) closes, and main closing is in closed condition.

Fig. 2 represents second kind of type pilot diaphragm type stop valve structure, and the difference of it and Fig. 1 structure is: fluid pressure source (1) is to connect chamber (16), and primary flow path output terminal (14) connects chamber (13).

Fig. 3 represents the third of type pilot diaphragm type stop valve structure, it with the difference of Fig. 1 structure is: the big deep aperture of diaphragm (12) (17) replaces pressure source flow tube (2) and chamber (4) is communicated with, cancelled import (11), the center of aperture (17) should be exported the radius of nozzle (15) greater than primary flow path to the center beeline of big diaphragm (12), and the diameter of aperture (17) should be less than the diameter of leak-off pipe (10).

Fig. 4 represents the 4th kind of type pilot diaphragm type stop valve structure, the difference of it and Fig. 1 is: fluid pressure source (1) connects chamber (16), the aperture (18) at big diaphragm (12) center replaces pressure source flow tube (2), be communicated with chamber (4), cancellation import (11), primary flow path output terminal (14) connects chamber (13).The diameter of import (18) is less than the diameter of pressure relief opening (7) and leak-off pipe (10), and it is few so just to make fluid enter chamber (4), and what go out from chamber (4) is many, and valve just can be opened.

Fig. 5 represents the 5th kind of type pilot diaphragm type stop valve structure, the difference of it and Fig. 1 structure is: slide bar (19) replaces knob (9), it only slides up and down and does not rotate, and slide bar (19) is contained in the center of chamber (16) and big diaphragm (12), big diaphragm (12) replaces pressure source flow tube (2) away from the aperture (17) of center, big diaphragm (12) center earial drainage nozzle (20) replaces relief port (7), also replaces leak-off pipe (10) simultaneously.Small diaphragm-piece (6) is not to be pressed on the pressure relief opening (7), but is pressed on the pressure release nozzle (20).The diameter of import (17) should be less than the diameter of pressure release nozzle (20), and it is few to guarantee that like this fluid enters in the chamber (4), and what go out from chamber (4) is many, and valve just can be opened.

Claims

1, a kind of type pilot diaphragm type stop valve that is used for fluid control, adopt big diaphragm (12) to constitute main valve, the upper chamber (4) of big diaphragm (12) and pressure relief device are communicated with, and fluid pressure source (1) communicates by aperture (17) on pressure source flow tube (2) or the diaphragm (12) and chamber (4)

The feature of type pilot diaphragm type stop valve is: spring (5), Small diaphragm-piece (6), pressure relief opening (7), leak-off pipe (10), knob (9), chamber (8) constitute manual pressure relief device, chamber (4), inlet opening (11), fluid pressure source (1), pressure source flow tube (2), big diaphragm (12), chamber (13), primary flow path output nozzle (15), chamber (16) and primary flow path output terminal (14) constitute main valve, big diaphragm (12) is sandwiched between chamber (4) and the chamber (13), fluid pressure source (1) connects chamber (13), and primary flow path output terminal (14) connects chamber (16).

2, according to the described type pilot diaphragm type of claim 1 stop valve, it is characterized in that: fluid pressure source (1) connects chamber (16), and chamber (13) connects primary flow path output terminal (14).

3, according to the described type pilot diaphragm type of claim 1 stop valve, it is characterized in that: fluid pressure source (1) connects chamber (13), primary flow path output terminal (14) connects chamber (16), the aperture (17) of big diaphragm (12) edge is communicated with chamber (4), the center of aperture (17) should be exported the radius of nozzle (15) greater than primary flow path to the center beeline of big diaphragm (12), and the diameter of aperture (17) should be less than the diameter of leak-off pipe (10).

4, according to the described type pilot diaphragm type of claim 1 stop valve, it is characterized in that: fluid pressure source (1) is pressed chamber (16), primary flow path output terminal (14) connects chamber (13), the central small hole (18) of big diaphragm (12) is connected with chamber (4), and the diameter of aperture (18) should be less than the diameter of little pressure relief opening (7) and leak-off pipe (10).

5, according to the described type pilot diaphragm of claim 1 stop valve, it is characterized in that: fluid pressure source (1) connects chamber (13), primary flow path output terminal (14) connects chamber (16), the aperture (17) of big diaphragm (12) edge is communicated with chamber (4), Small diaphragm-piece (6) sealing that the pressure relief opening (20) of big diaphragm (12) center is pushed down by spring (5), slide bar (19) is contained in chamber (16) center, slide bar (19) moves up and down and can back down Small diaphragm-piece (6) and make pressure relief opening (20) through chamber (16) enter primary flow path output terminal (14) after the pressure release of chamber (4) by big diaphragm (12) center, and the diameter of big diaphragm (12) edge's aperture (17) should be less than the diameter of pressure relief opening (20).