CN87207200U

CN87207200U - Two-way pressed fluid switch

Info

Publication number: CN87207200U
Application number: CN 87207200
Authority: CN
Inventors: 邱志凌
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-06-17
Filing date: 1987-06-17
Publication date: 1988-04-20

Abstract

The utility model relates to a two-way pressed fluid switch used in hydraulic, pneumatic, and heat engineering, etc. fluid systems, which is mainly composed of a valve body, a ball core, a spring, a thimble and a lever, wherein, the spring presses the ball core on a valve seat to normally close the switch. The lever is propelled to open the switch, and the lever is relieved to close the switch automatically; but if the outlet pressure is higher than the inlet pressure, the switch can be opened automatically to relief the outlet pressure. The utility model can be made into a manual thumbing type pressure meter switch. The utility model has the advantages of low cost, high reliability, high pressure, self-closing, pressure relieving automatically, etc., and any leak-off pipe is not arranged. The service life of the pressure meter can be effectively prolonged. In addition, the switch can be made into a two-way position switch and an electromagnetical pilot valve.

Description

Two-way pressed fluid switch

The utility model is a kind of ball core type two logical pressure fluid switches.Existing two logical pressure fluid switches are generally conical core type stop valve or guiding valve, are conical core type stop valve or guiding valve pattern just as hydrodynamic pressure table switch.For the conical core type stop valve, can not automatically reset after valve is outwarded winding and close, make pressure gauge often to be under the system high pressure, reduced manometric working life and precision, and pressure gauge is washed out.And sliding valve style switch manufacture cost is higher, pressure is low, poor sealing performance, and will install leak-off pipe additional when using, increased the complexity and the cost of system.

The utility model aims to provide that a kind of cost is low, performance good, working pressure is high, can forward automatically reset close, reverse two logical pressure fluid switches of automatic pressure-relieving.The utility model switch mainly is made up of valve body, spherical valve core, spring, thimble, Sealing and lever.One valve seat is arranged on the valve body, an inflow port is also arranged respectively before and after the valve seat and go out head piece.The ball core has a spring to make that the ball core is pressed on the valve seat, off switch by the influent stream oral-lateral; The ball core goes out the head piece side a thimble, and there is a lever thimble outer end, depresses this lever, and power can push up the ball core from valve seat, open switch after amplifying through thimble.Unclamp lever, spring is pressed onto the ball core on the valve seat again, switch is automatically reset closes; When inflow port pressure descends, go out head piece side pressure fluid and can back down the ball core, use the decline (release) automatically thereupon of head piece side pressure.Compare with the conical core type stop valve, the utility model switch replaces the awl core with the ball core, has simplified manufacturing process, has increased that forward is closed automatically, the reverse performance of automatic pressure-relieving; Compare with the sliding valve style switch, the utility model switch has the advantage that cost is low, working pressure is high, sealing is reliable and save leak-off pipe.

Accompanying drawing has been described embodiment of the present utility model.Fig. 1 is the structural drawing of hand-pushing two logical pressure fluid switches, and Fig. 2 a, b, c are respectively the function symbol that the utility model switch is made hand-pushing pressure meter switch, two current Cheng Kaiguan and two energising magnetic pilot-actuated valves.

Fig. 1 hand-pushing two through-flow body switches are made up of valve body 1, back-up ring 2, orifice plate 3, spring 4, ball core 5, thimble 6, Sealing 7, plug screw 8, lever 9, snapper 10, cover 11, positioning screwn 12, bearing pin 13 and screw 14.Spring 4 is pressed in ball core 5 on the valve seat on the valve body 1, makes P mouth fluid stream less than the A mouth, switch cuts out; Press down snapper 10, lever 9 pushes up ball core 5 from valve seat, makes switch opens through thimble 6.Unclamp snapper 10, spring 4 makes that ball core 5 is pressed onto on the valve seat, switch forward (P-A) automatically resets closes; If the P mouth pressure descends, A mouth high-pressure spray know from experience back down ball core 5, (oppositely A-P) automatic pressure-relieving that makes switch A mouth.If this switch as pressure meter switch, is pressed down snapper 10, switch opens during pressure measurement shown in Fig. 2 a.Loose one's grip after the survey, switch cuts out automatically, system P mouth surge pressure can not enter A mouth pressure table, prevent that pressure gauge from washing out; In addition, in case system pressure (P mouth pressure) descends, thereby the A mouth pressure can descend automatically (being the pressure gauge release) thereupon prolong manometric working life.Positioning screwn 12 can back down switch so that long-term observation pressure.Plug screw 8 compresses Sealing 7, guarantees sealing.

If the snapper 10 of lever 9 manipulatable ends changes roller into, press off switch by mechanical cam, then Fig. 1 embodiment becomes two current Cheng Kaiguan, can be used as the stroke guide unloading valve of hydraulic machinery.If lever 9 usefulness electromagnet promote, then switch becomes two energising magnetic pilot-actuated valves, can be used as the electromagnetic pilot unloading valve of relief valve in the fluid power system.

Claims

1, a kind of two logical pressure fluid switches of forming by valve body and spool, it is characterized in that: a valve seat is arranged on the valve body, one inflow port is arranged respectively before and after the valve seat and go out head piece, spool is spherical, by the influent stream oral-lateral one spring is arranged at this ball core, the ball core is pressed on the valve seat, and the ball core leans on out the head piece side that one thimble is arranged, and there is lever the thimble outer end.

2, a kind of two of claim 1 logical pressure fluid switches is characterized in that thimble Sealing 7 is compressed by a plug screw 8.

3, claim 1 or 2 a kind of two logical pressure fluid switches is characterized in that the lever control end is equipped with snapper.

4, a kind of two of claim 3 logical pressure fluid switches is characterized in that having a positioning screwn that can back down switch.

5, a kind of two of claim 3 logical pressure fluid switches is characterized in that the lever control end changes roller into.