CN2395094Y - Prepressing valve - Google Patents

Abstract

The utility model comprises a valve seat, a central screw bolt, a screw bolt seat, a handle, a clack, a sealing ring, a return spring, a spring inner cavity, a lower sealing cover and a valve port, wherein the spring inner cavity is positioned at the lower end of an inner hole of the valve seat and the lower part of the spring inner cavity is screwed into the lower sealing cover. The return spring, the clack and the sealing ring are arranged in the spring inner cavity and the valve port is positioned at the upper end of the spring inner cavity. The central screw bolt is arranged in the screw bolt seat, the upper end of the central screw bolt is provided with the handle and the screw bolt seat is arranged on the valve seat. The return spring supports against the clack and the sealing ring to the lower port of the valve port through the elastic force. The handle is rotated to make the central screw bolt move down and support against the central screw bolt to the clack, and the clack can be pressed downwards to open the water flow. The utility model is used for controlling the fluid flow, and has the advantage that the sealing ring is not easy to damage.

Description

A kind of roof pressing type valve

The utility model belongs to the valve technology field.

Prior art is valve not from the beginning, comprises a seal ring, and with a center bolt that is connected with handle, when the up time handle with sleeve, when driving center bolt and down moving, center bolt is about to seal ring and down is pressed on the valve port, and current are closed.When the counterclockwise rotation active handle, when the drive center bolt is up, is about to seal ring and loosens, reduce to be added in the pressure on the seal ring, make seal ring under the effect of import hydraulic pressure, valve port is opened in up motion, opens current.In this kind water valve, for close port, need on seal ring, to add sizable pressure, for this reason, seal ring weares and teares easily.And the blow-by part is arranged slightly, cause and leak, just need further tighten screw rod, seal ring is easier to be injured.This is not long basic deficiency of prior art water valve life-span.

The roof pressing type valve of cutting out when up when being to provide a kind of center bolt descending, the purpose of this utility model is provided.

The purpose of this utility model is to realize like this, a kind of roof pressing type valve, comprise valve seat, water intake, water outlet, center bolt, screw bolt seat, handle, on obturage lid, on obturage seal ring, valve, valve seal ring, returning spring, spring intracavity, obturage lid and valve port down.Spring intracavity is between valve seat endoporus hypomere water intake and water outlet, its upper end is slightly smaller than the valve port of spring intracavity internal diameter for internal diameter, returning spring is contained in the spring intracavity, and the spring intracavity lower end mouth is obturaged there to be the lid of obturaging under externally threaded to be screwed into, and returning spring is in compressive state.Valve is contained on the upper-end surface of returning spring, dress valve seal ring on the valve, the returning spring that is in compressive state with its elastic force from bottom to top with valve and on valve seal ring roof pressure on the end opening of valve port, valve port is closed.Center bolt is contained in the internal thread of screw bolt seat endoporus hypomere with the outside thread in its stage casing, can move up and down while rotating in screw bolt seat.Screw bolt seat is contained in its outside thread in the internal thread of valve seat endoporus epimere, and screw bolt seat and valve seat are combined closely.Junction between center bolt epimere bar and the screw bolt seat endoporus epimere be equipped with obturage lid and on the seal ring of obturaging sealed.Handle is contained in the upper end of center bolt, and the lower end and the valve of center bolt join.When clockwise rotating handle when making center bolt descending, center bolt is that the roof pressure valve is descending, opens valve port, opens current.When rotating counterclockwise handle, center bolt is up, valve and on the valve seal ring up under the effect of returning spring elastic force, close port is by current.

The utility model is compared with existing valve, advantage is, because the elastic force of valve and dependence of valve seal ring and returning spring and water intake hydraulic pressure sum roof pressure are on valve port, close current, and the effect of center bolt has been an effect that the roof pressure valve is opened current, suffered pressure can not surpass the elastic force of returning spring on valve and the valve seal ring, can not increase because of the stressed increase of center bolt, and water intake hydraulic pressure is big more, and then valve is closed sternly more, so the wearing and tearing that the valve seal ring is subjected to are little, life-span is long, do not need often to change seal ring, make things convenient for the user, effectively using water wisely.Be applicable to family, unit, industrial and mining enterprise, particularly be applicable to numerous rural subscribers.Also can be applicable to control the valve of various liquid streams.

Fig. 1 is a structural drawing of the present utility model.Fig. 1 is described as follows: wherein, 1 is valve seat, and 2 is water intake, and 3 is water outlet, and 4 is center bolt, 5 is screw bolt seat, and 6 is handle, 7 on the lid of obturaging, 8 seal rings of obturaging on being, 9 is valve, 10 is the valve seal ring, and 11 is returning spring, and 12 is spring intracavity, 13 under the lid of obturaging, 14 is valve port.

An embodiment of the present utility model 1 is described below in conjunction with the accompanying drawings: spring intracavity 12 is between valve seat 1 endoporus hypomere water intake 2 and water outlet 3, its upper end is a valve port 14, returning spring 11 is contained in the spring intracavity 12, spring intracavity 12 lower end mouth are covered 13 and are screwed into and obturage to have to obturage under externally threaded, returning spring 11 is in compressive state, valve 9 is contained on the upper-end surface of returning spring 11, valve seal ring 10 is housed on the valve 9, the returning spring 11 that is in compressive state with its elastic force from bottom to top with valve 9 and on valve seal ring 10 roof pressures on the end opening of valve port 14.Center bolt 4 is contained in the outside thread in its stage casing in the internal thread of endoporus hypomere of screw bolt seat 5, and screw bolt seat 5 is contained in the internal thread of valve seat 1 epimere endoporus with its outside thread.Junction between center bolt 4 epimere bars and the screw bolt seat 5 epimere endoporus, being equipped with obturages cover 7 and on the seal ring 8 of obturaging.Handle 6 is contained in the upper end of center bolt 4.

Claims (1)

1. roof pressing type valve, comprise valve seat (1), water intake (2), water outlet (3), center bolt (4), screw bolt seat (5), handle (6), on obturage lid (7), on obturage seal ring (8), valve port (14), it is characterized in that also comprising valve (9), valve seal ring (10), returning spring (11), spring intracavity (12) and under the lid (13) of obturaging; Spring intracavity (12) is positioned between valve seat (1) endoporus hypomere water intake (2) and the water outlet (3), its upper end is slightly smaller than the valve port (14) of spring intracavity (12) internal diameter for internal diameter, returning spring (11) is contained in the spring intracavity (12), spring intracavity (12) lower end mouth is obturaged there to be the lid (13) of obturaging under externally threaded to be screwed into, valve (9) is contained on the upper-end surface of returning spring (11), valve (9) is gone up dress valve seal ring (10), the returning spring (11) that is in compressive state with its elastic force from bottom to top with valve (9) and on valve seal ring (10) roof pressure on the end opening of valve port (14); Center bolt (4) is contained in the internal thread of screw bolt seat (5) endoporus hypomere with the outside thread in its stage casing, and screw bolt seat (5) is contained in its outside thread in the internal thread of valve seat (1) endoporus epimere, and screw bolt seat (5) is combined closely with valve seat (1); Between center bolt (4) epimere bar and screw bolt seat (5) the endoporus epimere junction be equipped with obturage lid (7) and on the seal ring (8) of obturaging; Handle (6) is contained in center bolt (4) upper end.