CN2397331Y

CN2397331Y - Plastic valve

Info

Publication number: CN2397331Y
Application number: CN 99249181
Authority: CN
Inventors: 张万武
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-11-03
Filing date: 1999-11-03
Publication date: 2000-09-20
Anticipated expiration: 2009-11-03

Abstract

The utility model discloses a plastic valve. The utility model comprises a valve body and a concave hole platform which is matched with a valve rod and is provided with a sealing ring. The upper part of the valve rod is provided with a handle, wherein the center of the upper part of the valve rod is provided with a through groove. Two symmetrical sides of the through groove and the top end of the through groove are provided with outwards convex slope clips which are locked with the end surface of the concave hole of the handle. A wedge valve cap is arranged in the through hole. A support ring is arranged between the lower end of the handle and the sealing ring. The utility model has the characteristics of simple structure and good sealing performance. The utility model is suitable for plastic valves, water taps and diaphragm valves.

Description

A kind of plastic valve

The utility model relates to a kind of valve, is a kind of rotary valve specifically, mainly is that the prior art valve stem seal has been done improvement.

Plastic valve in the known technology, the seal ring that installs on the shrinkage pool platform that it is mainly cooperated with valve rod by valve body, utilize the handle mounting hole to insert on valve rod, by the top screw handle valve rod is linked together, the axial downforce compressing handle end that produces when relying on screw lock acts on seal ring, thereby make seal ring produce distortion, play the sealing between valve rod and valve body.The design of this kind structural plastic valve and in long-term the use, have following point:

1,, dies and cause cost height and efficiency of assembling slow because of having screw hole in advance because the valve rod top is connected the Placement that cooperates the employing screw with handle.

2, the decentraction during screw lock under promptly impacting force is not kept in balance consistent situation, is easy to generate the poor sealing phenomenon.

3, under prolonged and repeated user mode, the screw loosening seal ring has been eliminated the compressing power that presses down, so cause the leakage of valve.

The purpose of this utility model provides a kind of have excellent sealing effect and plastic valve simple in structure.

For achieving the above object, technical solution of the present utility model is finished like this: a kind of plastic valve, comprise valve body and built-in valve rod, on the shrinkage pool platform that its valve body cooperates, seal ring is housed, by valve rod top one handle is installed, and is opened a groove in the valve rod central upper portion, wherein the groove top of two symmetrical sides has the inclined-plane clip of evagination and the central fovea hole end surface snap-fit of handle top, by the wedge shape valve gap is set in the valve rod groove, it is linked into an integrated entity.

Another program of present technique comprises that also the valve gap body can omit the wedge-like body part that cooperates with the valve rod groove, directly adopts parallel valve gap, utilizes the clip of valve rod upper end to cooperate with handle locking, does not influence being connected of valve rod and handle equally.

Also be included between handle, at its lower end and the seal ring in the scheme of present technique and be provided with support ring, or utilize handle, at its lower end directly to contact the formation sealing with seal ring.

The characteristics that the utility model compared with prior art has are: the valve rod of plastic valve has adopted the direct and handle secure fit of elastic clip, also be added with the wedge-like body valve gap simultaneously, the conformity that has promptly kept integral material, avoid selecting for use metalwork, help the raw-material recycling of plastic cement, reduce overall cost.Because reasonable in design, assembling are fast, and it is reliable to have adopted the support ring parts to have the balanced sealing of axial pressure, have reduced handle, at its lower end and seal ring and directly rubbed and contact the defective of the sealability reduction that the damage surface causes.Present technique also adapts to plastic cement ball valve, water tap, membrane valve etc.

Embodiment is to this novel being further described in conjunction with the accompanying drawings.

Fig. 1 is a kind of topology view of plastic valve.

By shown in Figure 1, whole PVC or the ABS plastic of adopting of a kind of plastic valve made, it mainly comprises valve body 7, in the shrinkage pool platform center hole that on valve body 7, has rotary valve rod 1 is set, the top of valve rod 1 is square cylinder, and open a bar shaped groove in the centre, wherein the groove top of two symmetrical sides has the inclined-plane elastic clip 4 of evagination, by on the valve body 7 shrinkage pool platforms seal ring 6 and support ring 5 being set respectively, bear the axial pressure of handle 2 by support ring 5, reduce the wearing and tearing of seal ring 6, reach the better seal effect.Upper unit handle 2 along its valve rod 1, the both ends of the surface of handle 2 center square holes are inserted on valve rod 1 square column, because the elastic clip 4 of valve rod 1 upper end is squeezed behind contraction and the in-position, the reinstatement attitude, utilize the inclined-plane clip 4 and recessed central party hole end surface chucking in handle 2 tops and pinning handle 2 of two evaginations, for the shrinkage pool that seals handle 2 upper ends and the reliability of connection, and wedge shape valve gap 3 is set in the groove of valve rod 1.

Described valve gap 3 also can utilize the parallel valve lid of valve gap 3 bodies except that above-mentioned structural type, rely on the elastic clip 4 on the valve rod 1 directly to cooperate the wedge-like body on the omission valve gap 3 with handle 2 lockings in the shrinkage pool of installation handle 2 upper ends.

Mention in the scheme of present technique between handle 2 lower ends and the seal ring 6 support ring 5 is set, make its seal ring 6 under handle 2 axial downforce effects, produce bigger sealing surface, and stress equalization, also can directly adopt the lower end of handle 2 to contact, all not influence its sealing effect by the mode in original technology with seal ring 6.

The structural type of present technique is applicable to ball valve made of plastic, water tap, membrane valve etc.

Claims

1, a kind of plastic valve, comprise valve body and built-in valve rod, on the shrinkage pool platform that its valve body cooperates, seal ring is housed, by valve rod top handle is installed, it is characterized in that opening a groove by the central upper portion of described valve rod (1), wherein the groove top of the two symmetrical sides inclined-plane clip (4) that has an evagination cooperates with the shrinkage pool end at handle (2) top, by in valve rod (1) groove wedge shape valve gap (3) being set it is linked into an integrated entity.

2, by the described a kind of plastic valve of claim 1, it is characterized in that it is by being provided with support ring (5) between handle (2) lower end and the seal ring (6).

3, by the described a kind of plastic valve of claim 1, it is characterized in that described valve gap (3) can be wedge-like body, or utilize parallel valve gap (3) body to cooperate with handle (2) top center shrinkage pool end face.