TWI407030B - Fast closing shutter - Google Patents

Abstract

The primary objective of the present invention is to provide a fast closing shutter, which comprises a main body having a piston chamber, an shaft hole being corresponding to a first end of the piston chamber, an inlet and outlet being formed near the first end of the piston chamber; a piston assembly having a sliding shaft being slidably mounted through the shaft hole and a piston unit being mounted on an inner end of the sliding shaft and having an linear bearing being mounted around the piston unit and contacting an inside wall of the piston chamber; a resilient member pressing the piston unit toward the first end of the piston chamber; and a bellow being mounted between the main body and the piston unit to proof pneumatic leak. Consequently, the friction between the piston unit and the piston chamber during piston motion could be efficiently reduced and the air flow could be isolated still by the bellow.

Description

Quick shut-off valve

The present invention relates to a quick shut-off valve, and more particularly to a stop valve member having a high reaction rate.

The use of a switch to control a valve member in an automatic control mechanism as a mechanism for blocking fluids such as gas and liquid has become a popular application. However, as the environment and conditions of use are different, the reaction time of the valve member will be different. Requirements, for example, in a laboratory architecture, a synchrotron radiation transmission vacuum tube connected to each laboratory, in order to prevent the high-energy radiation beam passing through the vacuum tube from being inadvertently operated at the rear end, a high-speed leakage countercurrent may be caused The gas causes severe damage to the overall system architecture, so a high-speed reaction shut-off valve (FCS) is used to block the vacuum tube by detecting the reaction of the exhaust gas in the shortest time.

The reaction time required for the on-off valve thus functioned is extremely short. For example, in the above experimental structure, the reaction time of the high-speed reaction shutdown valve is as short as 10 milliseconds, but in order to achieve such a short reaction time requirement, Mostly, through the precise and complicated solenoid valve structure, such as the quick valve unit structure proposed in Korean Patent No. I299384 and Japanese Patent No. I237680, the quick valves can achieve the function of rapid response, but the cost of implementation is low. The technical requirements of the above and the process are quite high, which is a big threshold for practical implementation, and it is not easy to implement it.

Conventional piston valves generally cannot be so short in reaction time. The main reason is that on the valve unit of this type, in order to maintain the airtightness of the piston assembly and the chamber, the piston assembly and the chamber are required. A gas-tight member, such as a leak-proof gasket, is disposed between the wall surfaces. However, the frictional resistance must be generated due to the contact between the sliding surfaces, so that the conventional piston valve cannot be utilized for the high-speed reaction time limitation as described above. The stop valve system, based on the above reasons, the inventors of the present invention have thought about and designed a quick shut-off valve in order to improve the lack of the prior art, thereby enhancing the industrial implementation.

In view of the above-mentioned problems, the main object of the present invention is to provide a quick shut-off valve in order to overcome the difficulties of the prior art.

In order to achieve the above object, the technical means adopted by the present invention is to design a quick closing valve, which comprises:

a body having a chamber having a cavity therein, a shaft hole is formed in a wall surface of the first end of the chamber, and a first linearity is disposed on the inner wall surface of the shaft hole a bearing, and an air inlet and an air outlet are disposed near the first end of the one of the chambers, and a fixing is disposed between the inlet and outlet holes and the second end of the chamber a piston extending from the peripheral wall of the chamber; a piston assembly correspondingly slidably disposed within the chamber, the piston assembly further comprising a sliding shaft and a piston; The sliding shaft is slidably correspondingly disposed in the first linear bearing of the shaft hole and has an inner end extending in the chamber, an outer end of the sliding shaft extending out of the body; wherein the piston is fixedly disposed on the body a second linear bearing is disposed on the inner end of the sliding shaft, and a second linear bearing is disposed on an outer ring wall surface, and the second linear bearing corresponds to the surrounding wall surface of the chamber; a returning elastic member is correspondingly disposed Between the body and the piston to provide a return of the piston toward the first end of the chamber a first telescopic sealing sleeve, the corresponding sleeve is disposed outside the sliding tube, and the two ends of the first telescopic sealing sleeve are respectively fixedly fixed to the fixing frame of the body and the piston. So that the piston and the first end of the chamber form an airtight space; and a second telescopic sealing sleeve, one end of which is sealingly fixed to the first end of the chamber corresponding to the shaft hole, And the other end thereof is sealingly fixedly disposed on the sliding shaft to prevent gas from entering and leaving the chamber from the shaft hole.

Wherein the valve is fixedly disposed on the outer end of the sliding shaft; wherein the return elastic member is pushed at one end of the chamber to the second end of the chamber, and the other end thereof is pushed against the piston; The first telescopic sealing sleeve and the second telescopic sealing sleeve are respectively a retractable bellows; wherein the first telescopic sealing sleeve and the second telescopic sealing sleeve are made of metal; wherein the chamber is cylindrical Wherein the return elastic member is a spring; and wherein the surrounding wall surface of the chamber is a smooth wall surface.

When the quick closing valve of the present invention is used, the air pipe can be connected to the air inlet and the air pipe, and the valve member is arranged on the air pipe to control the movement of the air inlet and outlet, and the opposite friction surface is formed during the movement of the piston. Linear bearing to avoid the reaction speed of the piston movement due to frictional force, and the shrinking sealing sleeve is used to replace the traditional piston movement, and the technical means of opening the space between the piston and the cavity can be used to manufacture the airtight space. It can be a piston switch valve that is completely airtight and greatly reduces friction, in order to achieve high-speed reaction actuation.

The present invention will be described in conjunction with the accompanying drawings in the accompanying drawings, and the drawings The subject matter is only for the purpose of illustration and supplementary description. It is not necessarily the true proportion and precise configuration after the implementation of the present invention. Therefore, the scope and configuration relationship of the attached drawings should not be limited to the scope of patent application of the present invention. Narration.

Referring to the first figure, the quick shut-off valve of the present invention may comprise a body (10), a piston assembly (20), a return elastic member (30), and a first telescopic assembly. a sealing sleeve (40) and a second telescopic sealing sleeve (50).

The body (10) may be a housing having a cylindrical chamber (11), and a shaft hole (12) is formed in a wall surface of the first end of the chamber (11), and Providing a first linear bearing (121) on the inner wall surface of one of the shaft holes (12) as a mechanism for reducing the frictional force of the inner ring wall surface, and in the chamber (11) An air inlet hole (13) and an air outlet hole (14) are disposed on a surrounding wall near the first end to allow gas to enter and exit, respectively, and the inlet and outlet holes (13) (14) and the A fixing frame (15) is disposed between the second end of the chamber (11), and the peripheral wall surface of the chamber (11) is formed to protrude, and the surrounding wall of the chamber (11) may be It is a smooth wall as a mechanism to reduce friction.

The piston assembly (20) is slidably disposed within the chamber (11). The piston assembly (20) further includes a sliding shaft (21), a piston (22) and a valve (23). Wherein the sliding shaft (21) is slidably correspondingly disposed in the first linear bearing (121) of the shaft hole (12) and an inner end thereof extends in the chamber (11), An outer end extends out of the body (10); wherein the piston (22) is fixedly disposed on the inner end of the sliding shaft (21), and a second linear bearing is disposed on an outer ring wall surface ( 221) (Linear Bearing), and the second linear bearing (221) corresponds to the surrounding wall surface of the chamber (11); wherein the valve (23) is correspondingly fixed to the sliding shaft (21) The end is selectively blocked to block a valve bore (90).

The returning elastic member (30) may be a spring disposed correspondingly between the body (10) and the piston (22), or may be the one that pushes the end of the chamber (11) with one end thereof. At the two ends, and pushing the other end thereof against the piston (22) to provide a return elastic force of the piston (22) toward the first end of the chamber (11).

The first telescopic sealing sleeve (40) may be a metal telescopic bellows (Bellow), and the corresponding sleeve is surrounded by the sliding tube (21), and the first telescopic sealing sleeve (40) The two ends are respectively fixedly fixed to the fixing frame (15) of the body (10) and the piston (22) to form a gap between the piston (22) and the first end of the chamber (10). An airtight space.

The second telescopic sealing sleeve (50) may be a metal bellows (Bellow), one end of which is correspondingly sealingly fixed to the first end of the chamber (11) corresponding to the shaft hole (12) And the other end thereof is sealingly fixedly disposed on the sliding shaft (21) as a gas-tight mechanism to prevent gas from entering and leaving the shaft hole (12).

Please refer to the second and third figures for further cooperation. When using the quick-closing valve of the present invention, the air pipe can be connected through the inlet and outlet holes (13) (14) and the valve member can be arranged on the gas pipe to control the pipe in and out. The action of the air flow, in one embodiment, after controlling the intake air from the air inlet (13), the airflow is filled between the piston (22) and the first end of the chamber (11), thereby acting as a piston ( 22) pushing the return elastic member (30) and driving the valve (23) for the purpose of relative actuation, thereby allowing the valve hole (90) to circulate, and further, when it is desired to quickly close the valve hole (90), The valve member connected from the air outlet (14) vents the internal air pressure, thereby returning the piston (22) to drive the valve (23) to be closed in the valve hole (90), and in the present invention during the piston movement A linear bearing (121) (221) is formed on the surface of the relative friction to avoid the reaction speed of the piston from being impeded by the frictional force, and a shrink sleeve (40) (50) is additionally provided to replace the conventional piston motion. The technical means of creating an airtight space by closing the space between the piston and the cavity, and thus becoming completely airtight and large Reduce friction of the piston and closing valve, in order to achieve a high speed of reaction actuated, so that the gain of visibility located.

The embodiments described above are merely illustrative of the technical spirit and the features of the present invention, and the objects of the present invention can be understood by those skilled in the art, and the scope of the present invention cannot be limited thereto. That is, the equivalent variations or modifications made by the spirit of the present invention should still be included in the scope of the present invention.

Looking at the above, it can be seen that the present invention has achieved the desired effect under the breakthrough of the prior art, and is not familiar with the skill of the artist, and its progress and practicability have been consistent with the patent. The application requirements, 提出 file a patent application according to law, and ask your bureau to approve the application for this invention patent, in order to invent invention, to the sense of virtue.

(10) ‧‧‧ Ontology
(11) ‧ ‧ chamber
(12)‧‧‧Axis hole
(121)‧‧‧First linear bearing
(13)‧‧‧Air intake
(14)‧‧‧ Vents
(15)‧‧‧ Fixing frame
(20)‧‧‧Piston components
(21)‧‧‧Slide axis
(22) ‧‧‧Pistons
(221)‧‧‧Second linear bearing
(23)‧‧‧ Valves
(30) ‧‧‧Reverting elastic parts
(40)‧‧‧First telescopic sealing sleeve
(50)‧‧‧Second telescopic sealing sleeve
(90)‧‧‧ valve hole

The first figure is a partial cross-sectional view of the configuration of the quick shut-off valve of the present invention.
The second figure is an illustration of an embodiment of the quick shut-off valve of the present invention.
The third figure is an illustration of an embodiment of the quick shut-off valve of the present invention.

(10) ‧‧‧ Ontology

(11) ‧ ‧ chamber

(12)‧‧‧Axis hole

(121)‧‧‧First linear bearing

(13)‧‧‧Air intake

(14)‧‧‧ Vents

(15)‧‧‧ Fixing frame

(20)‧‧‧Piston components

(21)‧‧‧Slide axis

(22) ‧‧‧Pistons

(221)‧‧‧Second linear bearing

(23)‧‧‧ Valves

(30) ‧‧‧Reverting elastic parts

(40)‧‧‧First telescopic sealing sleeve

(50)‧‧‧Second telescopic sealing sleeve

Claims (8)

A quick shut-off valve that includes:
a body having a chamber having a cavity therein, a shaft hole is formed in a wall surface of the first end of the chamber, and a first linearity is disposed on the inner wall surface of the shaft hole a bearing, and an air inlet and an air outlet are disposed near the first end of the one of the chambers, and a fixing is disposed between the inlet and outlet holes and the second end of the chamber a frame extending from the surrounding wall of the chamber;
a piston assembly correspondingly slidably disposed in the chamber, the piston assembly further comprising a sliding shaft and a piston; wherein the sliding shaft is slidably corresponding to the shaft hole An inner end of the first linear bearing extends in the chamber, an outer end of the first linear bearing extends through the body; wherein the piston is fixedly disposed on the inner end of the sliding shaft and an outer ring wall The sleeve is provided with a second linear bearing, and the second linear bearing corresponds to the surrounding wall surface of the chamber;
a returning elastic member correspondingly disposed between the body and the piston to provide a returning elastic force of the piston toward the first end of the chamber;
a first telescopic sealing sleeve, the corresponding sleeve is disposed outside the sliding shaft, and the two ends of the first telescopic sealing sleeve are respectively fixedly sealed to the fixing frame of the body and the piston, so as to Forming an airtight space between the piston and the first end of the chamber; and a second telescopic sealing sleeve having one end correspondingly sealingly fixed to the first end of the chamber corresponding to the shaft hole, and the other One end is sealingly fixedly disposed on the sliding shaft to prevent gas from entering and leaving the chamber from the shaft hole. The quick closing valve of claim 1, wherein a valve is fixed to the outer end of the sliding shaft. The quick-closing valve of claim 1, wherein the return elastic member pushes one end of the elastic member to the second end of the chamber and pushes the other end thereof against the piston. The quick-closing valve of claim 1, wherein the first telescopic sealing sleeve and the second telescopic sealing sleeve are respectively a retractable bellows. The quick-closing valve of claim 4, wherein the first telescopic sealing sleeve and the second telescopic sealing sleeve are made of metal. The quick shut-off valve of claim 1, wherein the chamber is cylindrical. The quick closing valve of claim 1, wherein the returning elastic member is a spring. The quick shut-off valve of claim 1, wherein the peripheral wall of the chamber is a smooth wall.