CN1844721A

CN1844721A - Novel plug valve

Info

Publication number: CN1844721A
Application number: CN 200610078680
Authority: CN
Inventors: 苏林波; 潘肖敏
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-05-08
Filing date: 2006-05-08
Publication date: 2006-10-11

Abstract

The invention relates to a screw valve, which comprises a valve body and a handle. Wherein, the flaps are cylinder with through holes; the flaps have symmetry valve base groove which contains a valve base to block the valve body; a compensate spring is arranged between the valve base and the valve base groove; the surface of valve base that near the valve body has a sealing liner; the connection between the flap and valve body has a sealing ring. The invention has small volume, reliable sealing and long service life, while it can be used in tap water, etc. Since the sealing is the pushing force generated by the pretightening force of compensate spring on the valve base and the medium on the flap; the compensate spring can make the valve base adhere the valve body, with lower bounce; and the pushing force of medium can be generated when the valve is closed, therefore, valve has less friction, to realize zero leakage.

Description

A kind of novel plug valve

One: technical field

The present invention relates to a kind of valve, particularly a kind of plug valve.

Two. technical background

Valve is widely used in daily life and in producing, according to the purposes difference, the valve kind is also a lot, still there are some problems in various in actual use valves, as shown in Figure 1, the thrust that pretightening force that the thrust at filler 1` place of leaning on this plug valve sealing surface employing metal to metal seal, sealing resolves into and medium produce flap 2`, valve body 3` and flap 2` adopt conical surface M to seal, difficulty of processing is big, the sealing difficulty contact owing to valve body 3` is whole with flap 2` simultaneously, so frictional force is big, serious wear, must manually compress the filler compensation sealing after the wearing and tearing, if sealing surface 4` damage, valve 3` can't seal.And common stopcock adopts the sealing of filler 1` formula, in order to guarantee the sealability of valve 3`, the pretightening force of filler 1` is bigger, once flap 2` wearing and tearing, flap 2` can move down, thereby causes the not enough and flap sealing surface pretightening force deficiency of filler 1` decrement, filler place and sealing all can be leaked, because the pretightening force of filler 1` is bigger, and filler 1` and flap 2` frictional force are also bigger, therefore the switch moment to valve 3` has very big influence simultaneously; Therefore common stopcock is shorter working life.

Three. summary of the invention

The objective of the invention is to: design a kind of novel plug valve, can compensate at any time after making its wearing and tearing, keeping the sealing of valve, and long service life, valve seal is good.

Structure of the present invention is as follows: a kind of novel plug valve, comprise valve body, handle, the flap structure is a cylinder type, have the through hole that makes the valve body conducting on the flap, flap is provided with the valve seat groove of symmetry, is placed with the valve seat that stops the valve body conducting in the valve seat groove, between valve seat and valve seat groove counterbalance spring is arranged, valve seat simultaneously is fixed with sealed line with rubber near valve body, and flap and valve body connecting part are placed with the seal ring that seals; Have the groove of fixing seal line with rubber on the valve body; There is the two seals circle flap and valve body connecting part, and the back-up ring that plays the role of positioning is arranged on the outside seal circle.

Adopt this structure to make valve have characteristics such as volume is little, in light weight, sealability reliable, long service life, can be widely used in fields such as gas, tap water, heat supply network, market prospects are boundless; Because valve sealing face is metal-rubber seal, sealing is the thrust that the pretightening force of valve seat and medium is produced flap by counterbalance spring, the counterbalance spring effect is to allow valve seat be close to valve body at any time, its elastic force is less, the thrust that medium produces flap only just can produce when valve closing, therefore the valve wearing and tearing are very little, and the effect owing to counterbalance spring can make the sealed line with rubber on the valve seat contact with valve body all the time after the wearing and tearing, thereby make valve keep absolute zero to leak.Valve body and flap top adopt twice O shape circle and a ring washer to form sealing, make valve body and flap top seal performance reliable especially, and working life is long especially, be 3～5 times of common stopcock, mainly be because sealing surface wear is little, and can compensate automatically after the wearing and tearing, and switch is light especially.

Four. description of drawings

Fig. 1 is the prior art structural drawing

Fig. 2 is that A cuts open Figure 1A----

Fig. 3 is a structural drawing of the present invention

Fig. 4 cuts open for the B---B of Fig. 3

Fig. 5 is the another kind of structure graph of Fig. 3

Five. embodiment

As shown in Figure 3, be specific embodiments of the invention, Fig. 5 is that flap 2 is in the open mode schematic representation, import 14 on the valve body 1 and outlet 15 are by 16 conductings of the through hole on the flap 2, Fig. 3 is the schematic representation that flap 2 is in closed condition, when flap 2 revolves when turning 90 degrees by handle 8, the valve seat 11 that is positioned at flap 2 upper valve base grooves 17 just in time is in the import 14 and outlet 15 of valve body 1, thereby stoped the conducting of valve body 1, removed handle 8 and nut 9 among Fig. 4, Fig. 4 is that the B---B of Fig. 3 cuts open, wherein, flap 2 structures are two valve seat grooves 17 that cylinder type has symmetry on it, with a through hole 16, be placed with valve seat 11 in the

valve seat groove

17,17 of valve seat 11 and valve seat grooves have counterbalance spring 10, valve seat 11 is fixed with sealed line with rubber 12 near valve body 1 place, and flap 2 is placed with the seal ring 3 and 5 that seals with valve body 1 connecting part; Have the groove 13 of fixing seal line with rubber 12 on the valve body 1; Flap 2 has two seals circle 3 and 5 with valve body 1 connecting part, the back-up ring 4 that plays the role of positioning is arranged on the seal ring 5, thereby play good seal action.

Also have circlip for shaft 7 and lockplate 6 on this valve.

When flap 2 was positioned at Fig. 4 position, valve was in closed condition, and the import 14 on the valve body 1 at this moment, outlet 15 stopped by valve seat 11, can not conducting, and the sealed line with rubber 12 on the valve seat 11 makes the slit of 11 of valve body 1 and valve seats obtain good sealing, and 18 is sealing surface.

Claims

1. novel plug valve, comprise valve body, handle, it is characterized in that: the flap structure is a cylinder type, have the through hole that can make the valve body conducting on the flap, flap is provided with the valve seat groove of symmetry, is placed with the valve seat that stops the valve body conducting in the valve seat groove, between valve seat and valve seat groove counterbalance spring is arranged, valve seat simultaneously is fixed with the sealed line with rubber that makes valve inleting water mouth and water outlet sealing near valve body, and flap and valve body connecting part also are placed with the seal ring that seals.

2. according to the described novel plug valve of claim, it is characterized in that: the groove that has the fixing seal line with rubber on the valve body.

3. according to the described novel plug valve of claim, it is characterized in that: there is the two seals circle flap and valve body connecting part, and the back-up ring that plays the role of positioning is arranged on the outside seal circle.