CN2303986Y

CN2303986Y - Improved cylinder type control valve

Info

Publication number: CN2303986Y
Application number: CN 97206827
Authority: CN
Inventors: 林琡卿
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-03-27
Filing date: 1997-03-27
Publication date: 1999-01-13
Anticipated expiration: 2007-03-27

Abstract

The utility model relates to an air cylinder type control valve, which comprises an air cylinder. The lower part of the air cylinder is provided with a connecting rod pipe of a valve seat; the air cylinder is provided with an air intake port; a piston is arranged in the air cylinder; a spring is sheathed on the upper part of the piston; a piston rod is arranged on the piston; the piston rod is penetrated and positioned in the connecting rod pipe; the bottom of the piston rod is provided with a valve plug in the valve seat of a valve body; the upper part of the air cylinder is provided with a hollow screw pipe by screws; a telescopic connecting rod is penetrated in the air cylinder, the telescopic connecting rod is sheathed with the top of the piston rod, a movable lantern ring is sheathed on the telescopic connecting rod, and a spring sleeve is pushed between the lantern ring and the piston. When a pipe system is broken, the hollow screw pipe can be rotated by hand tools to make that the valve plug in the valve seat is opened or closed.

Description

The cylinder type control valve of improvement

The utility model relates to the cylinder type control valve.

General known cylinder type control valve as shown in Figure 6, a link tube b is installed in the below of cylinder a, link tube b below device one Y valve c, the appropriate location, side below of cylinder a is provided with a suction port a1, device one piston d in the cylinder a, piston d top is nested with a spring e, piston d goes up installing one piston rod f, piston rod f system is set in the link tube b, be equipped with spring g and axle envelope h between piston rod and the link tube b, piston rod b bottom and be positioned at Y valve c and be provided with a valve plug c1, valve plug c1 then is positioned on the valve body c2 of Y valve c.When general situation, the spring e pushing piston d of device in cylinder a, and the piston rod f on the piston d is on the valve body c2 of valve plug c1 pushing and pressing in Y valve c, thereby Y valve c is closed; Otherwise if air pressure is introduced pneumatic cylinder a, then this piston d then up moves, and valve plug d leaves valve body c2 in the drive cylinder, and valve plug c1 one leaves valve body c2 and promptly is able to the conducting stream.

The known Y type cylinder control valve system of right this kind comes control valve plug c1 whether to open with the piston d position in the cylinder a, and under normal circumstances this piston d system by the elastic force pushing of spring e, but the side is to open Y valve c in the cylinder a just in case then air pressure must be introduced when needing to open Y valve c under urgent situation, again if then can't in urgent, open Y valve c when running into the pressure system simultaneous faults and being unable to supply high pressure steam or other fluid, then may cause danger, just have bad consequence to produce.

If because of the system failure, make the fluid input side decompression of Y valve, cause the pressure of the pressure of outlet side greater than input side, make the hydrodynamic pressure of the sum total of the elastic force of spring e and input side hydrodynamic pressure less than outlet side, then cause fluid countercurrent current easily, the easier system failure that causes, even produce more serious chain reaction.

Again, if be used to control high pressure steam, then after shutdown, can form condensed water after steam stays for some time in pipe, this moment, the steam that condensed water moment of low temperature is run into high temperature can produce gas explosion after start; Then do not have any problem as using in postive direction, and must oppositely use the time, if the elastic force deficiency of spring e, then gas explosion phenomenon is oppositely backed down piston, therefore, must select the higher spring e of elasticity coefficient for use; So as described above, the gas pressure that generally is used to promote piston is a fixed pressure, if the elasticity coefficient of spring e is higher, then gas pressure can't promote piston d, thereby comparatively trouble inconvenience in installing.

The purpose of this utility model aims to provide a kind of cylinder control valve, makes it when pipe-line system breaks down, and can open or close valve plug with manual mode; And the elastic force that can adjust the spring in the cylinder is to cooperate the air supply system gas pressure change; And make valve seat output, go into side and can exchange and have the function of two-way use.

The utility model is to realize like this, the cylinder type control valve of improvement, comprise a cylinder, a link tube is installed in the below of cylinder, and in the below of link tube device one valve seat, appropriate location, cylinder side below is provided with a suction port, in cylinder, install a piston in addition, and be nested with a spring, installing one piston rod on the piston in the piston top, this piston leverage is set in the link tube, be equipped with spring and U-shaped axle envelope between piston rod and link tube, link tube top device has a seal of adjusting screw, piston rod bottom and be positioned at valve seat one valve plug is housed, valve plug then is positioned on the valve body of valve seat, it is characterized in that: cylinder top spiral shell is established a cored screw, places a shrinking connecting-rod in it, and shrinking connecting-rod is connected piston rod part, a sheathed Movable loop on the shrinking connecting-rod, spring housing withstands between Movable loop and the piston.

Wherein, connecting tube and valve pipe joint are positioned at; The bottom of connecting tube is equiped with a sleeve, and this sleeve below is a tapered hole, and the top of valve plug is a taper, and valve plug leans the tapered hole below sleeve.

The utility model has the advantages that, when pipe-line system breaks down, can or close valve plug, and the elastic force that can adjust the spring in the cylinder enlarges the scope that is suitable for pressure to cooperate the air supply system gas pressure change with the manual mode unlatching; Have two kinds of installing modes not forward or backwards, be convenient to be arranged on the pipeline and various valve body on.

The following drawings and embodiment will be described further technical characteristics of the present utility model:

Fig. 1 is a stereogram of the present utility model.

Fig. 2 is a sectional view of the present utility model.

Fig. 3 is the sectional view that the utility model is closed by the rotation cored screw.

Fig. 4 is the enforcement illustration that the utility model is implemented on directional control valve.

Fig. 5 is the enforcement illustration that the utility model is implemented on flowing valve.

Fig. 6 is the sectional view of known pneumatic cylinder control valve.

As Fig. 1, shown in 2, the utility model comprises a cylinder 1, a link tube 2 is installed in the below of cylinder 1, and in the below of link tube 2 device one valve seat 3, the appropriate location, side below of cylinder 1 is provided with a suction port 11, device one piston 4 in the cylinder 1, and be nested with a spring 5 in piston 4 tops, on this piston 4, install a piston rod 6 again, and this piston rod 6 is to be set in the link tube 2, is equipped with spring 61 and U-shaped axle envelope 62 between this piston rod 6 and link tube 2, has a seal to adjust screw 63 in link tube 2 top devices again, piston rod 6 bottoms and be positioned at valve seat 3 valve plug 31 is housed, valve plug 31 then is positioned on the valve body 32 of valve seat 3.

This cylinder 1 top spiral shell is established one and is had the cored screw 7 of hexagon head 71, and places a shrinking connecting-rod 73 in cored screw 7, and this shrinking connecting-rod 73 is connected the top of piston rod 6; A sheathed Movable loop 8 on the shrinking connecting-rod 73, and above-mentioned spring 5 is enclosed between Movable loop 8 and the piston 4.

According to above-mentioned structure, the secondary piston 4 that do not move is pushed by spring 5, the valve plug 31 of piston rod 6 belows is pressed against on the valve body 32 in the valve seat 3, and is closed condition.If gas pressure source is entered by the suction port 11 of cylinder 1, piston 4 up shifts, and makes the valve plug 31 of piston rod 6 belows leave valve body 32, and be opening state this moment, and must make valve seat 3 conductings.

Just in case the air supply system fault is unable to supply air pressure when opening the valve plug of keeping away in the valve seat 3 31, and must make valve seat 3 for opening state this moment the time, can be enclosed within on the hexagon head 71 of cored screw 7 by manual tool, and rotation cored screw 7, it is up shifted and drive shrinking connecting-rod 73 and up move, and get pull-up piston 4, piston rod 6 and valve plug 31 in the lump, so that open valve seat 3; Thereby when urgent, be able to manual mode with valve seat 3 unlatchings.

Again, just in case during the fluid input side decompression of valve seat 3 (promptly the high-pressure liquid of input reduces to zero originally), and the state of this valve seat 1 for opening, for preventing the fluid countercurrent current in the valve seat 1, to prevent causing more serious chain reaction because of the system failure, rotatable hollow screw rod 7 moves down it at this moment, and must compress the movable moving collar 8, and because Movable loop 8 belows are equiped with spring 5, the below of spring 5 is a piston 4 again, so, when Movable loop 8 pushes downwards continuously, piston 4 is moved down, and the valve plug 31 of piston rod 6 belows is pressed on the valve body 32 of valve seat 3, thereby be able to manual mode it is closed, as shown in Figure 3.If at this moment, the gas pressure source that should move up in order to driven plunger 4 still exists, and still can force rotation cored screw 8, and piston 4 is moved down to close valve seat 3, thereby when the pipe-line system fault, be able to manual mode reinforcement valve 31 and closely close in case fluid stopping body adverse current.

Moreover, when if the gas pressure of air supply system is low, and the elastic force of spring 5 more greatly can't be when moving on the air pressure ejector ram, must Movable loop 8 be moved up by rotation cored screw 7, and must reduce the elasticity tension of spring 5, make and under lower supply gas pressure, still moved, and need not by changing the lower spring 5 of elasticity coefficient, the trouble of the spring 5 of the various different elasticity coefficient of few preparation of for manufacturer, being slowed down.And owing to must control the displacement amount of Movable loops 8 by rotation cored screw 7, with the elasticity tension of adjustment spring 5, so, when installing, must make it be applicable to the pressure of air supply system by rotation cored screw 7.

As shown in Figure 3,, some pipe-line system flows because must making fluid be able to both sides' conversion, if when adverse current is controlled, and same must when making valve plug 31 in off position, still can effectively closing, in case the fluid stopping body leaks by rotation cored screw 7 to increase the elastic force of spring 5.

In addition in the joint of this connecting tube 2 with valve seat 3, and the bottom that is positioned at connecting tube 2 is equiped with a sleeve 9, the below of this sleeve 9 is a tapered hole, the top of this valve plug 31 is a taper, and when valve plug during in opening state, valve plug 31 is leaned below sleeve 9, prevented that valve plug 31 is when opening state, by leaking in the glade plane space between piston rod 6 and the sleeve 9, and must be when valve plug 31 opening states enhanced leaktightness, in case the fluid stopping body leaks.

Shown in Fig. 4,5, the utility model also may be implemented in directional control valve 3 ', angle valve or flowing valve 3 except may be implemented in Y valve " on, or on other the valve body.

Claims

1. the cylinder type control valve of an improvement, comprise a cylinder, a link tube is installed in the below of cylinder, and in the below of link tube device one valve seat, appropriate location, cylinder side below is provided with a suction port, in cylinder, install a piston in addition, and be nested with a spring in piston top, installing one piston rod on the piston, this piston leverage is set in the link tube, is equipped with spring and U-shaped axle envelope between piston rod and link tube, link tube top device has the seal of an adjustment screw, piston rod bottom and be positioned at valve seat one valve plug is housed, valve plug then is positioned on the valve body of valve seat, it is characterized in that: cylinder top spiral shell is established a cored screw, in it, place a shrinking connecting-rod, shrinking connecting-rod is connected piston rod part, a sheathed Movable loop on the shrinking connecting-rod, and spring housing withstands between Movable loop and the piston.

2. according to the cylinder type control valve of the described improvement of claim 1, it is characterized in that: connecting tube and valve seat joint, the bottom that is positioned at connecting tube is equiped with a sleeve, and this sleeve below is a tapered hole, the top of valve plug is a taper, and valve plug leans the tapered hole below sleeve.