CN203421212U

CN203421212U - Two-position three-way stop valve

Info

Publication number: CN203421212U
Application number: CN201320412807.7U
Authority: CN
Inventors: 蒋孟杰
Original assignee: NINGBO SHENGDA SUN PNEUMATIC MACHINERY CO Ltd
Current assignee: Ningbo Shengda Sunshine Automation Technology Co ltd
Priority date: 2013-07-10
Filing date: 2013-07-10
Publication date: 2014-02-05
Anticipated expiration: 2023-07-10

Abstract

The utility model relates to the technical field of pipeline valves, in particular to a two-position three-way stop valve. The two-position three-way stop valve comprises a valve body, a valve cover and a valve rod. A valve cavity is formed in the position, on the inner side of the valve cover, of the vale body. Annular leakage stopping pads are fixedly arranged in the valve cavity. A seal cover matched with the leakage stopping pads is arranged at the position, below the leakage stopping pads, in the valve cavity. A pressure discharge hole communicated with the valve cavity is formed in the valve cover. The lower end of the valve rod sequentially penetrates through the pressure discharge hole and the leakage stopping pads and then is connected with the seal cover. An air inlet and an air outlet are formed in the two ends of the valve body respectively and communicated with the valve cavity on the two sides of the leakage stopping pads respectively. The two-position three-way stop valve is reasonable in structure, simple in operation and capable of being well matched with an electromagnetic control system. The valve body is in a stopped state when being initialized, the valve rod is in a self-locking state, and therefore maloperation can be effectively avoided. After being released, the valve rod moves upwards under the simultaneous action of a spring and air pressure in the inner cavity of the valve body. In the disconnection process, air pressure in an air loop is discharged through the pressure discharge hole, system maloperation is avoided, an arc round cover at the top end of a button is over against the upper end of the pressure discharge hole, and using safety is improved.

Description

A kind of cut-off type two position three-way valve

Technical field

The utility model relates to pipeline valve technical field, particularly a kind of cut-off type two position three-way valve.

Background technique

Stop valve is to be applied to the industry equipment that fluid is controlled, be used in industry and control altogether the flow parameter of adjusting fluid in system, for controlling fluid cut-out or open-minded, and the valve type base components of controlling uninterrupted or damming and open circuit, by coordinating other valve members to be used in combination, there is the multiple use patterns such as switch and changes in flow rate.

Two position three-way valve is wherein a kind of stop valve that blocks control that is applied to pipeline, common two position three-way valve comprises valve body and is arranged in the valve rod in valve body, and the air flue on valve rod respectively correspondence is arranged between suction port and air outlet, valve rod passes through the phase place of change in valve body to control the path between suction port and air outlet, and then realizes the break-make of place system is controlled.Still there is certain defect in existing two position three-way valve, such as the interior pressure of valve body has certain obstruction to the displacement of valve rod, make the startup of valve rod need larger power, the phase place of valve rod needs two-way control, operating flexibility is not strong, cause volume to increase, therefore, be necessary existing technology to improve.

Model utility content

The purpose of this utility model is for the defect of prior art and deficiency, and a kind of rational in infrastructure, easy to operate, reliable and stable cut-off type two position three-way valve is provided.

For achieving the above object, the utility model is by the following technical solutions:

A kind of cut-off type two position three-way valve described in the utility model, comprise valve body, be fixed at valve gap on valve body, be liftably arranged in the valve rod on valve gap, the valve body of described valve gap inner side is provided with valve pocket, in valve pocket, be fixed with annular antidiarrheal pad, in the valve pocket of antidiarrheal pad below, be provided with the capping being mated, valve gap is provided with the relief hole that is communicated with valve pocket, and valve rod lower end is successively through being connected with capping after relief hole, antidiarrheal pad; Valve body two ends have inlet hole and air outlet hole and are communicated with the valve pocket of antidiarrheal pad both sides respectively.

Further, in the valve pocket of described antidiarrheal pad top, be provided with the spacer of conflicting with valve gap, in the valve pocket of antidiarrheal pad below, be provided with step, spacer coordinates with step is fixed in valve pocket antidiarrheal pad, and valve rod lower end is successively through being connected with capping after relief hole, spacer, antidiarrheal pad.

Further, described valve rod upper end is provided with button, and button upper end is provided with the arc dome corresponding with relief hole.

The utility model beneficial effect is: compared with prior art, the utility model is rational in infrastructure, valve body is initially in cut-off state, and the interior pressure of inlet hole is conflicted capping and antidiarrheal pad, and valve rod, in self-locking state, can effectively be avoided malfunction operation; Discharge after valve rod, the air pressure of spring and body cavity acts on simultaneously valve rod is moved up, and simple to operate, energy well coordinate with electromagnetic control system; When cutting off gas transmission path, by relief hole, discharge with the air pressure in air circuit, avoid system malfunction, the arc dome on button top, over against relief hole upper end, has improved the Security of using.

Accompanying drawing explanation

Fig. 1 is whole cross-sectional view of the present utility model.

In figure:

10, valve body; 11, valve pocket; 12, seal ring one; 13, antidiarrheal pad;

14, capping; 15, inlet hole; 16, air outlet hole; 17, spacer;

18, step; 20, valve gap; 21, relief hole; 22, seal ring two;

23, stationary platen; 24, spring; 30, valve rod; 31, button;

32, arc dome; 33, annular groove.

Embodiment

Below in conjunction with accompanying drawing, the utility model is further described.

A kind of Novel two-position three-way described in the utility model, comprise valve body 10, be fixed at valve gap 20 on valve body 10, be liftably arranged in the valve rod 30 on valve gap 20, the valve body 10 of described valve gap 20 inner sides is provided with valve pocket 11, between valve gap 20 and valve body 10, be provided with seal ring 1, valve pocket 11 is coordinated and is formed closed shape body by valve gap 20, valve rod 30, seal ring 12 and valve body 10; In valve pocket 11, be fixed with annular antidiarrheal pad 13, antidiarrheal pad 13 is divided into two independent air that communicate by the valve pocket of sealing 11, and in the valve pocket 11 of antidiarrheal pad 13 belows, be provided with the capping 14 being mated, capping 14 is conflicted and is made the through hole sealing on antidiarrheal pad 13 with antidiarrheal pad 13, and then valve pocket 11 is divided into two obstructed independent air; Valve gap 20 is provided with the relief hole 21 that is communicated with valve pocket 11, is provided with seal ring 2 22 in relief hole 21, and seal ring 22 coordinates to keep valve pocket 11 sealings with valve rod 30; Valve rod 30 lower ends are successively through being connected with capping 14 after seal ring 2 22, antidiarrheal pad 13; Valve body 10 two ends have inlet hole 15 and air outlet hole 16 and are communicated with the valve pocket 11 of antidiarrheal pad 13 both sides respectively; On off operating mode between inlet hole 15 and air outlet hole 16 is determined by capping 14 and antidiarrheal pad 13 mated condition.

In the valve pocket 11 of described antidiarrheal pad 13 tops, be provided with the spacer 17 of conflicting with valve gap 20, seal ring 2 22 is located between valve gap 20 and spacer 17, thus valve rod 30 through seal ring 2 22 with its formation interference fit and then the sealing that keeps valve pocket 11; In the valve pocket 11 of antidiarrheal pad 13 belows, be provided with step 18, spacer 17 coordinates with step 18 is fixed in valve pocket 11 antidiarrheal pad 13, valve rod 30 lower ends are successively through being connected with capping 14 after relief hole 21, spacer 17, antidiarrheal pad 13, valve rod 30 declines and drives capping 14 to depart from the path that antidiarrheal pad 13 is opened between inlet hole 15 and air outlet hole 16, and while valve rod 30 coordinates with seal ring 2 22 closes relief hole 21 and then make valve pocket 11 form sealing.

Described valve rod 30 upper ends are provided with button 31, button 31 upper ends are provided with the arc dome 32 corresponding with relief hole 21, button 31 is for connecting arc dome 32 and valve rod 30, and arc dome 32 be located at relief hole 21 directly over, during the interior discharge high velocity air of relief hole 21 by arc dome 32 shunting and step-downs.

The valve gap 20 of described relief hole 21 bottoms is provided with stationary platen 23, conflicts with button 31 and stationary platen 23 respectively in the two ends that are arranged with spring 24 and spring 24 on valve rod 30; When valve rod 30 is released from bottom, spring 24 improves initial driving force upwards to valve rod 30, and the self-locking state that finally makes valve rod 30 keep up.Described valve rod 30 is provided with annular groove 33, and the internal diameter of seal ring 2 22 coordinates with valve rod 30 external diameters of annular groove 33 upper ends; The internal diameter of described antidiarrheal pad 13 coordinates with valve rod 30 external diameters of annular groove 33 lower ends.

Working principle: the utility model is when original state, and valve rod 30 is parked in extreme higher position and drives capping 14 and antidiarrheal pad 13 to form self-lockings, between inlet hole 15 and air outlet hole 16 in blocking state; After valve rod 30 is pressed downwards by external force, the valve rod 30 that seal ring 2 22 is enclosed within annular groove 33 upper ends is closed relief hole 21, and capping simultaneously 14 departs from antidiarrheal pad 13, pressurized air in inlet hole 15 enters air outlet hole 16 through the valve pocket 11 of antidiarrheal pad 13 both sides, and now the utility model is in open mode; When pressure relief discharges after valve rod 30, the air pressure in spring 24 and valve pocket 11 applies thrust upwards to valve rod 30 simultaneously, and valve rod 30 is got back to initial bit, and antidiarrheal pad 13 both sides valve pockets 11 are blocked, and the air pressure in air outlet hole 16 discharges via relief hole 21.

The above is only better embodiment of the present utility model, and the equivalence of doing according to structure, feature and principle described in the utility model patent claim therefore all changes or modifies, and is included in the utility model patent claim.

Claims

1. a cut-off type two position three-way valve, comprise valve body (10), be fixed at the valve gap (20) on valve body (10), liftably be arranged in the valve rod (30) on valve gap (20), it is characterized in that: the valve body (10) of described valve gap (20) inner side is provided with valve pocket (11), in valve pocket (11), be fixed with annular antidiarrheal pad (13), in the valve pocket (11) of antidiarrheal pad (13) below, be provided with the capping (14) being mated, valve gap (20) is provided with the relief hole (21) that is communicated with valve pocket (11), valve rod (30) lower end is successively through relief hole (21), after antidiarrheal pad (13), be connected with capping (14), valve body (10) two ends have inlet hole (15) and air outlet hole (16) and are communicated with the valve pocket (11) of antidiarrheal pad (13) both sides respectively.

2. cut-off type two position three-way valve according to claim 1, it is characterized in that: in the valve pocket (11) of described antidiarrheal pad (13) top, be provided with the spacer (17) of conflicting with valve gap (20), in the valve pocket (11) of antidiarrheal pad (13) below, be provided with step (18), spacer (17) coordinates with step (18) is fixed in valve pocket (11) antidiarrheal pad (13), and valve rod (30) lower end is successively through being connected with capping (14) after relief hole (21), spacer (17), antidiarrheal pad (13).

3. cut-off type two position three-way valve according to claim 2, is characterized in that: described valve rod (30) upper end is provided with button (31), and button (31) upper end is provided with the arc dome (32) corresponding with relief hole (21).