CN2886245Y

CN2886245Y - Plug valve with cylindrical valve core

Info

Publication number: CN2886245Y
Application number: CN 200620005250
Authority: CN
Inventors: 贾祯祥
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-01-22
Filing date: 2006-01-22
Publication date: 2007-04-04
Anticipated expiration: 2016-01-22

Abstract

A stopcock valve for a cylinder valve core: arrowhead on the outside surface of the valve body marks the influx direction of pressure flow; valve core mounting hole is located at the middle of the valve body; inlet hole perpendicularly communicates with outlet hole relative to the valve core mounting hole; the valve core is mounted into the valve core mounting hole after three sealing latex ring arranged on the valve core; two sealing latex ring arranged at the two terminals of the valve core cylinder is used to seal the clearance between the valve core cylinder and the valve core mounting hole to prevent the liquid flowing out from the two terminals of the valve core cylinder. When the valve core is circumrotated to the unclosed direction of the valve, the through hole in the middle of the valve core is communicated with the inlet and the outlet hole so that the liquid could flow through; when the valve core is circumrotated to the closed direction of the valve, only on the side of the inlet hole, the valve core cylinder has a latex ring round about the distribution of the holes in the middle of the valve core. The latex ring closed the inlet hole together with the entity body of the valve core cylinder to close the valve. The valve could be used in different liquid tubes with high, intermediate or low pressure.

Description

A kind of plug valve of cylindrical spool

Technical field

The utility model relates to a kind of switch fluid or regulates the valve of flow, and this valve is widely used in oil. chemical industry. and electric power. metallurgy. light industry. the height of civilian water supply and sewage. in. low-pressure and oil. gas. water. different pressures such as soda acid. different medium. on the pipeline of different temperatures.

Background technique

At present, it is the plug valve (following at the abbreviation stopcock) of cylindrical structural that a kind of spool is arranged in the world, its advantage is that this valve inner fluid smallest cross-sectional size of flowing through is more than or equal to internal diameter of the pipeline cross-sectional sizes (similar in appearance to the circulation aperture of ball valve valve), simple in structure, operational torque is little, long service life; Its shortcoming is when hydrodynamic pressure is higher than 0.3MPA, and valve can not be closed fully, has fluid and manages internal leakage through spool.Being configured to of this stopcock: valve body constitutes the ostium of valve. tap hole and spool mounting hole, and the spool mounting hole site is in the valve body middle part, and ostium and tap hole are symmetrically distributed in both sides with respect to the spool mounting hole and intersect vertically with the spool mounting hole; Two O-ring seals are positioned at the two ends of cylindrical valve spool cylinder, spool is installed in the spool mounting hole, the cushion rubber at spool cylinder two ends stops fluid to flow out from spool mounting hole two ends, when spool is rotated to direction that valve is opened fully, through hole on the spool cylinder is consistent with the ostium of valve body and tap hole direction and communicate, spool is rotated to valve when being in buttoned-up status again, on the spool cylinder of ostium one side, there is a cushion rubber to enter the spool mounting hole surface distributed at place, aperture around fluid, this cushion rubber enters fluid the hole sealing together with the entity part of spool cylinder, close fluid, also have simultaneously a rubber sealing to flow out the aperture on the spool cylinder of tap hole one side, this cushion rubber seals tap hole together with the entity part of spool cylinder.The structure of this stopcock is symmetrical fully on ostium and tap hole both direction, need not to distinguish fluid during installation and flows into and the direction that flows out.

Summary of the invention

In order to overcome existing this stopcock when the fluid mesohigh, the problem that valve can not be closed fully.The utility model provides a kind of stopcock, the advantage of existing existing stopcock, the smallest cross-sectional size that the valve inner fluid is flowed through is more than or equal to the internal diameter of the pipeline cross-sectional sizes, simple in structure, operational torque is little, long service life has solved the problem that existing stopcock can not cut out fully, simultaneously applicable to height when mesohigh. in. low different pressures fluid.

The technological scheme that the invention for solving the technical problem adopted is: the valve body of novel stopcock constitutes the ostium of valve. tap hole and spool mounting hole, the arrow of valve outer surface indicates the inflow direction of pressure fluid, the spool mounting hole site is in the valve body middle part, and ostium and tap hole are symmetrically distributed in both sides with respect to the spool mounting hole and intersect vertically with the spool mounting hole; Two O-ring seals are positioned at the two ends of spool cylinder, a cushion rubber is positioned at spool cylindrical surface one side, spool is installed in the spool mounting hole, when spool is rotated to direction that valve is opened fully, through hole on the spool cylinder is consistent with the ostium of valve body and tap hole direction and communicate, spool is rotated to valve when being in buttoned-up status again, having an O-ring seal to enter the aperture around fluid on the spool cylinder of ostium one side distributes, this cushion rubber enters fluid the hole sealing together with the entity part of spool cylinder, and does not have O-ring seal to distribute around flowing out the aperture on the spool cylinder of tap hole one side.And existing stopcock, when cylindrical valve spool is rotated when valve is in buttoned-up status, also having an O-ring seal to flow out the aperture around fluid on the spool cylinder of pressure fluid tap hole one side distributes, when hydrodynamic pressure is higher, for existing stopcock, when the low speed rotation spool is closed fluid, in outflow opening one side, the part material of cushion rubber will be expressed into the crossing oral area edge of tap hole and spool mounting hole surface by pressure fluid on the spool cylinder, the part cushion rubber material that these are extruded stops the continuation rotation of spool, and valve can not be closed fluid fully.The utility model is at existing this problem of stopcock, O-ring seal on the cancellation outflow opening one side valve stem stem face, the installation direction that increases stopcock simultaneously on valve outer surface indicates, and requires setter to press the arrow direction indication form mounted valve consistent with the pressurised fluid flow direction.

The beneficial effects of the utility model are that this novel stopcock is applicable to height. in. on the fluid line of low different pressures, overcome the characteristic that former valve is not useable for high-pressure liquid.

Description of drawings

Following drawings and Examples further specify the utility model.

Fig. 1 is the utility model stopcock valve when opening fully, the projection drawing of a direction of stopcock.

Fig. 2 is the B-B sectional view of Fig. 1.

Fig. 3 is a stopcock valve when closing fully, the projection drawing of another direction of stopcock.

Fig. 4 is the A-A sectional view of Fig. 3.

1. cylindrical valve spool among the figure, 2. valve body, 3. O-ring seal, 4. O-ring seal, 5. O-ring seal

Embodiment

In Fig. 3, the arrow on the valve body (2) indicates the direction that pressure fluid flows into.In Fig. 4, O-ring seal (3) is positioned at the entity part of cylindrical valve spool (1) the pressure fluid inflow entrance being sealed of pressure fluid inflow entrance on every side, and the valve of this moment is in buttoned-up status.The reason that O-ring seal only is set on the spool cylinder of inflow entrance one side is: close or open in the process of valve at spool (1), pressure fluid promotes O-ring seal (3) to cylindrical valve spool (1) one side shifting, and the no chance of O-ring seal (3) enters into the entry port of pressure fluid.And existing stopcock, on the cylindrical valve spool of pressure fluid outflow opening one side, also have O-ring seal be positioned at the pressure fluid outflow opening around, entity part with cylindrical valve spool (1) is sealed the pressure fluid outflow opening, in the process of rotary spool throttle down, the part material of outflow opening O-ring seal is under the promotion of pressure fluid, to be expressed into the spool mounting hole surface and the crossing oral area of outflow opening of valve body (2), the cushion rubber Material card that is extruded stops the continuation rotation of cylindrical valve spool (1) at the oral area edge of valve body (2) outflow opening, valve can not be closed fully.

Fig. 3 is the valve buttoned-up status, the relative valve body (2) of cylindrical valve spool (1) is rotated an angle of 90 degrees degree again, promptly there is valve shown in Figure 1 to be in full open position, in Fig. 2, the ostium of the through hole of cylindrical valve spool (1) and valve body (2) and tap hole direction are consistent and communicate, O-ring seal (4) and O-ring seal (5) lay respectively at the cylinder two ends of cylindrical valve spool (1), stop pressure fluid to flow out from the cylinder fitting surface of valve body (2) with cylindrical valve spool (1).

Claims

A kind of plug valve of cylindrical spool, the fluid ostium of valve body and tap hole vertically communicate with respect to the spool mounting hole and arrange in line, the cylindrical valve spool periphery two ends that cooperate with the spool mounting hole respectively are provided with an O-ring seal, the spool middle part is provided with a through hole, and this hole communicates with the spool cylinder is vertical; At spool cylinder middle part, the valve core through hole side-walls, the local cylinder of spool between the O-ring seal of two end part is provided with the ring packing cushion rubber, it is characterized in that: at spool cylinder middle part, on the local cylinder of two spools of valve core through hole side-walls, only on a local cylinder ring packing cushion rubber is set therein, at valve outer surface one-directional fluid flow sign arrow is set simultaneously.