CN203286011U

CN203286011U - Micro force switching valve

Info

Publication number: CN203286011U
Application number: CN2013203399781U
Authority: CN
Inventors: 刘工勤
Original assignee: Individual
Current assignee: Yangquan Industrious Technology Industrial Development Co ltd
Priority date: 2013-06-14
Filing date: 2013-06-14
Publication date: 2013-11-13
Anticipated expiration: 2023-06-14

Abstract

The utility model relates to a valve, in particular to a micro force switching valve. The technical problems that a frequently-used valve in the prior art is strenuous in opening and closing and high in manufacturing cost are solved. The micro force switching valve comprises a valve body, a piston cylinder, a flow inlet cavity and a flow outlet cavity, wherein a valve port is formed between the flow inlet cavity and the flow outlet cavity, a valve plug at the lower end of a valve rod and the valve port are matched in opening and closing, a piston at the upper end of the valve rod is in sliding fit with the inner wall of the piston cylinder, a channel hole is formed inside the valve rod, a breathable through hole is formed in the position, different from the position of a center hole, of a lower end cover, and a micro force valve plug is arranged on a micro flow channel which can communicate the flow outlet cavity with an upper piston cavity. The micro force switching valve is simple in structure and ingenious in design; the purpose for opening and closing the valve can be achieved through micro force by the utilization of the pressure of fluids themselves, so that the valve is convenient to use and saves effects; the micro force valve plug is small in size and low in manufacturing cost.

Description

Little power switch valve

Technical field

The utility model relates to valve, is specially a kind of little power switch valve.

Background technique

Be used in the market controlling the valve of fluid flow mostly all by handwheel switch, the shortcoming of its existence is that large valve switch is required great effort very much, labor intensity is large, some large valve electricity consumption machinery such as hydrodynamic pressure of taking offence of having to drives, make the high and complex structure of cost, therefore in the urgent need to a kind of, can just can regulate the valve of switching by very little power.

Summary of the invention

The utility model, for solving valve switch effort and the high technical problem of cost commonly used at present, provides a kind of little power switch valve.

The utility model is realized by the following technical solutions: a kind of little power switch valve, comprise valve body, piston cylinder, influent stream chamber, go out to flow chamber, influent stream chamber and go out to flow between chamber to offer valve port, valve rod lower end valve plug opens and closes and is equipped with mutually with valve port, the setting that is slidably matched of upper end piston and piston cylinder inwall, valve rod inside is provided with port hole, and the position that is positioned at non-central hole on lower end cap has the breathing through hole, and the microchannel that can be communicated with stream chamber and upper piston chamber is provided with little power valve plug.

Piston is divided into upper piston chamber 18 and lower piston chamber 19 with piston cavity.The import of little power switch valve and fluid communication.When Open valve, first little power valve plug is opened, use the stream chamber and be connected with piston cavity, the fluid that enters the upper piston chamber through the valve stem passage hole enters out the stream chamber through microchannel, pressure in the upper piston chamber reduces, and the fluid in the influent stream chamber upwards promotes valve plug, and fluid is from a large amount of outflow of valve port; When the needs throttle down, make little power valve plug close microchannel, the fluid that is entered the upper piston chamber by port hole promotes piston downwards, closes to valve plug, at this moment valve closing.

The effect of breathing through hole is when piston moves up and down, and the fluid in the lower piston chamber, by the spiracle free flow, keeps the transient equiliblium of piston bearing up-down force; Little power valve plug is opened a bit, the flow quantitative change that flows into out the stream chamber through microchannel is large, the pressure of upper piston chamber inner fluid diminishes, flow out through the fluid that valve port enters out the stream chamber this moment, some enters the lower piston chamber by breathing through hole, and pushing piston moves upward, until piston bearing up-down force balance, the motion of piston and valve plug stops, and fluid flow just increases to quantitative values accordingly; When reducing little power valve plug aperture, the hydrodynamic pressure in the upper piston chamber increases, and pushing piston moves downward, and valve plug also moves downward thereupon, until piston bearing up-down force balance, piston and valve plug motion stop, and the valve plug aperture diminishes, and fluid flow diminishes.Because piston is in a state that is subjected to force homeostasis all the time, by very small strength just can regulating piston move up and down, make simultaneously valve plug to move up and down, realized controlling by small strength the purpose of the fluid flow that flows out valve port.After closing little power valve plug, the hydrodynamic pressure in the upper piston chamber increases, and piston and valve plug move down under the pressure-acting of fluid, until valve plug is closed valve port, whole valve also just is in closed condition.

Port hole has played with breathing through hole the important function that keeps the piston bearing up-down force to be in transient equiliblium, and the active force up and down that piston is subject to fluid remains on the state of a balance, is convenient to the adjusting of little power valve plug to flow.

The utility model is simple in structure, designs ingeniously, has utilized the pressure of fluid self to realize can realizing with small strength the switch purpose of valve, and is convenient and strength-saving; Little power valve plug volume is small and exquisite cheap.

Description of drawings

Structural representation when Fig. 1 little power open and close valve described in the utility model is closed.

Structural representation when Fig. 2 little power open and close valve described in the utility model is opened.

Fig. 3 microchannel described in the utility model and little power valve plug configurations schematic diagram.

1 -Valve body, the 2-piston cylinder, 3-influent stream chamber, 4-goes out to flow chamber, the 5-valve port, 6-valve rod, 7-valve plug, the 8-piston, 9-port hole, 10-lower end cap, 11-breathes through hole, 12-upper end cap, 13-the first hole, the 14-first passage, 15-second channel, 16-valve opening, the little power valve plug of 17-, 18-upper piston chamber, 19-lower piston chamber.

Embodiment

A kind of little power switch valve, comprise valve body 1, piston cylinder 2, influent stream chamber 3, go out to flow chamber 4, influent stream chamber 3 and go out to flow between chamber 4 to offer valve port 5, valve rod 6 lower end valve plugs 7 open and close and are equipped with mutually with valve port 5, the setting that is slidably matched of upper end piston 8 and piston cylinder 2 inwalls, valve rod 6 inside are provided with port hole 9, and the position that is positioned at non-central hole on lower end cap 10 has breathes through hole 11, can be communicated with stream chamber 4 and be provided with little power valve plug 17 with the microchannel in upper piston chamber 18.

Described microchannel comprises out the first hole 13 that is connected with upper piston chamber 18 at upper end cap 12 lower end walls, open the first passage 14 that is connected with the first hole 13 in upper end cap 12 and open lower end and the second channel 15 that goes out to flow chamber 4 and be connected in piston cylinder 2 sidewalls; The upper end-hole of second channel 15 is connected with first passage 14; Upper end cap 12 position corresponding with second channel 15 has valve opening 16, and little power valve plug 17 is located in valve opening 16.

In Fig. 1, fluid enters in upper piston chamber 18 through port hole 9, and piston 8 is pressed down, and valve plug 7 is with valve port 5 sealings.Arrow represents the flow direction of fluid.

Arrow in Fig. 2 represents the flow direction of fluid, and in figure, little power valve plug 17 is opened, and valve plug 7 and piston 8 move on all, fluid through valve port 5, go out to flow chamber 4 and flow out valve bodies 1.

Claims

1. little power switch valve, comprise valve body (1), piston cylinder (2), influent stream chamber (3), go out to flow chamber (4), influent stream chamber (3) and go out to flow between chamber (4) to offer valve port (5), it is characterized in that, valve rod (6) lower end valve plug (7) opens and closes and is equipped with mutually with valve port (5), the setting that is slidably matched of upper end piston (8) and piston cylinder (2) inwall, valve rod (6) inside is provided with port hole (9), the position that is positioned at non-central hole on lower end cap (10) has breathes through hole (11), can be communicated with stream chamber (4) and be provided with little power valve plug (17) with the microchannel in upper piston chamber (18).

2. little power switch valve as claimed in claim 1, it is characterized in that, described microchannel comprises out the first hole (13) that is connected with upper piston chamber (18) at upper end cap (12) lower end wall, open the first passage (14) that is connected with the first hole (13) in upper end cap (12) and open lower end and the second channel (15) that goes out to flow chamber (4) and be connected in piston cylinder (2) sidewall; The upper end-hole of second channel (15) is connected with first passage (14); Upper end cap (12) position corresponding with second channel (15) has valve opening (16), and little power valve plug (17) is located in valve opening (16) .