CN1315622A

CN1315622A - Valve with front and back sealing rings and regulation structure of internal axial pressure difference

Info

Publication number: CN1315622A
Application number: CN 00102191
Authority: CN
Inventors: 游伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-03-23
Filing date: 2000-03-23
Publication date: 2001-10-03

Abstract

A valve with front and back sealing rings and axial internal pressure difference regulating structure is based on the Chinese patent No. 931026741, and features that an axial internal pressure difference regulating tube is coaxially installed at the displacement segment of back sealing ring. Said regulating tube can balance the axial internal pressure difference subjected by the valve core and set the magnitude and direction of the said axial internal pressure difference.

Description

The valve that has front and back sealing rings and regulation structure of internal axial pressure difference

The present invention relates to a kind of valve that has front and back sealing rings and regulation structure of internal axial pressure difference, especially be fit to make small-sized in, Low pressure valve.

931026741 " seal ring displacement type valve " patent of invention, ingenious get around and to have avoided plastic part size, shape, positional accuracy poor, hardness, the birth defect that intensity is low make and not only do not reduce the valve that all-plastic is made, improved sealing reliability on the contrary, working life, and operation flexibly, convenience, making and using embody energy-conservation, water saving, environmental protection, and overall economic efficiency, all have very obvious and huge advantage.But, because the tank segment structure characteristics of crossing of seal ring displacement before the valve body, on manufacturing process, if valve body is disposable injection molded, before seal ring displacement cross tank sector hole footpath, can be less than the aperture of back seal ring displacement section, make valve body inner bore internal axial pressure inconsequent, spool all has the trend of the automatic displacement of seal ring direction backward all the time, causes valve closes unreliable.In such cases, make valve closes reliable, or increase complicated locking device, or balance valve body inner bore internal axial pressure difference.It is inadvisable to increase complicated locking device.Balance valve body inner bore internal axial pressure difference, when making large and medium-sized valve, its size, space are big, and what valve body was gone forward seal ring displacement crosses tank section and back seal ring displacement section, and the sectional manufacturing connects with bolt.But when making valvelet, owing to be subjected to size, space, and the restriction of weight, particularly when making water tap, also be subjected to the necessary harsh requirement attractive in appearance of appearance and modeling, therefore, valve body just must be disposable injection molded.

Purpose of the present invention provides a kind of valve that has front and back sealing rings and regulation structure of internal axial pressure difference.The valve body of this kind valve is needn't segmentation injection molded, and the front and back sealing rings internal axial pressure difference in the valve body inner bore also can reach balance.

Purpose of the present invention is achieved in that the back seal ring displacement section in valve body inner bore, an internal axial pressure difference adjustment of coaxial installation pipe.Internal axial pressure difference is adjusted the cylindrical of pipe, cooperates with valve body inner bore; Internal axial pressure difference is adjusted pipe orifice, cooperates with the back seal ring with outer.Like this, when changing internal axial pressure difference and adjust pipe orifice aperture and valve body inner bore and cross directly relative size of tank sector hole, also with regard to balance or adjusted the size and Orientation of front and back sealing rings internal axial pressure difference.

Owing to adopted such scheme, when valve body is injection molded into one when whole, balance and adjusted the size and Orientation of front and back sealing rings internal axial pressure difference not only, and structure is also simple, integrity is strong, and is aesthetic in appearance, and assembling, the manufacturability of making are good.

The invention will be further described below in conjunction with accompanying drawing and example.

Fig. 1 is the structure longitudinal sectional drawing of 931026741 inventions.

Fig. 2 is that the structure of 931026741 inventions is in A place transverse cross-sectional view.

Fig. 3 is that the structure of 931026741 inventions is in B place transverse cross-sectional view.

Fig. 4 is that the valve body inner bore L section circumference of 931026741 inventions launches circle.

Fig. 5 is the present invention's a structure longitudinal sectional drawing.

With reference to Fig. 1: because the seal ring 3 and the seal ring 4 displaced segments apertures of valve body 1 endoporus are inconsistent, radially area is variant to cause seal ring 3 and seal ring 4, and therefore, axially just there are pressure reduction in seal ring 3 and seal ring 4.The present invention is the displaced segments at valve body 1 endoporus seal ring 4, coaxial installation one internal axial pressure difference adjustment pipe 16 (with reference to Fig. 5).16 endoporus apertures are managed in the internal axial pressure difference adjustment and valve body 1 endoporus is crossed tank sector hole footpath relative size by adjusting, thereby reach the purpose of balance and adjustment spool 2 suffered axial pressure difference size and Orientations.

Simultaneously, reach reliable sealing between 16 cylindricals, manage between 16 cylindricals, one or more static seal circles 17 have been installed at valve body 1 endoporus and internal axial pressure difference adjustment for valve body 1 endoporus and internal axial pressure difference adjustment are managed.

In example shown in Figure 5, the preceding seal ring 3 displaced segments apertures of valve body 1 endoporus, to manage 16 endoporus apertures consistent with the internal axial pressure difference adjustment of back seal ring 4 displacements, during valve closes, before seal ring 3 and back seal ring 4 axial pressure vectors and be zero, at this moment, valve neither can be opened automatically, also can additionally not increase steering force during Open valve.To valvelet, simple for structure, reasonable, integrity is strong, make, assembly technology is very good.

Claims

1, valve that has front and back sealing rings axial pressure difference adjustment structure of forming by valve body (1), spool (2), preceding seal ring (3), back seal ring (4), gear (5), rolling element (8), handle (14), internal axial pressure difference adjustment pipe (16), static seal circle (17), it is characterized in that: seal ring (4) displaced segments behind valve body (1) endoporus, coaxial installation internal axial pressure difference adjustment pipe (16); Internal axial pressure difference adjustment pipe (16) endoporus cooperates with seal ring (4) cylindrical; Internal axial pressure difference adjustment pipe (16) cylindrical cooperates with valve body (1) endoporus; On the cylindrical of internal axial pressure difference adjustment pipe (16), one or more static seal circles (17) are installed.

2, the valve that have front and back sealing rings and regulation structure of internal axial pressure difference according to claim 1 is characterized in that static seal circle (17) endoporus cooperates with internal axial pressure difference adjustment pipe (16) cylindrical, and cylindrical cooperates with valve body (1) endoporus.