CN2890547Y

CN2890547Y - Structure for preventing outward leakage of valve

Info

Publication number: CN2890547Y
Application number: CN 200520123324
Authority: CN
Inventors: 孙炜
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-11-25
Filing date: 2005-11-25
Publication date: 2007-04-18
Anticipated expiration: 2015-11-25

Abstract

The utility model relates to a structure for preventing outward leakage of valve. The utility model comprises a valve rod, a valve casing, a tray loop, a bush, a rubber gasket, an O-shaped rubber band, a receding gasket, a lock nut, a spring, a washer and a nut. The tray loop is arranged in the low-necked desk of the valve rod, the O-shaped rubber band is embedded into the annular slot of the bush, the rubber gasket is arranged in the low-necked desk of the bush, the partial ware of the bush is inserted into the partial ware of the valve rod and makes the bottom of the bush and the top of the tray loop combined. The groupware inserts from the bottom bore of the valve casing. A receding bush entering the upper end of the bush is arranged on the top surface of the valve casing and fixed with a rivet. The lock nut screw down with the bush. The spring and the tray loop are arranged from the minor end of the valve rod into the upper bore of the lock nut. And the lock nut screw down at the helical place of minor end of the valve casing and the spring is tightly pressed. Such structure applies to the brake valve and the cut-off valve, etc., meets special functions of high temperature resistance and anti-corrosion, and prevent the leakage of dangerous and poisonous gas, so as to be environment-friendly. The utility model has the advantages of simply and reasonably designed structure, being easy to produce and a long service life.

Description

Be used for valve and prevent the outer structure of revealing

Technical field

The utility model relates to valve, particularly relates to a kind of valve that is used for and prevents the outer structure of revealing.

Background technique

Water supply, air feed and oil supply system in industrial production and the people's daily life used valve in a large number at present, valve is recurrent problem along the valve rod external leakage, the way that solves is to adopt packing seal usually, its shortcoming is that wearing and tearing in use appear in filler easily, thereby cause leakage, therefore, the leakage problem of resolving valve is the important topic of valve design all the time.

The model utility content

The purpose of this utility model provides a kind of valve that is used for and prevents the outer structure of revealing, and can overcome the shortcoming of prior art, has realized preventing medium along the valve rod external leakage, the utility model modern design, and advantages of simple, easy to process, long service life.

The utility model comprises that mainly valve rod, valve gap, backing ring, lining, rubber cushion, O type cushion rubber, retaining pad, locking mother, spring, packing ring and nut constitute.Backing ring is fitted on the shoulder of valve rod, and in the annular groove of O type cushion rubber inlay busher, rubber cushion is installed on the shoulder of lining, and portion's piece installing that valve rod is inserted in portion's piece installing of lining makes the bottom surface of lining combine with the sealing of backing ring end face; The combinations thereof part is close on the endoporus shoulder of valve gap rubber cushion from the bottom hole insertion of valve gap, and retaining pad packs into the upper end of lining and is placed on the end face of valve gap, fixes with rivet; The female female thread of locking cooperates with the external screw thread of lining to be tightened, and spring and packing ring are successively put into the female upper end hole of locking from the small end of valve rod, and nut screwing clamping is at the screw thread place and the holddown spring of the small end of valve gap.

Structure of the present utility model is applicable to valves such as gate valve and stop valve.The utility model has utilized the mentality of designing of metal flat sealing and multiple defence line, through transformation and improvement in a few years, can obtain to prevent that medium in the valve is along the optimum efficiency of valve rod external leakage.Part in the utility model selects different materials can also satisfy anti-high temperature, etch-proof specific function.The utility model can prevent harmful and toxic gas spills, and realizes the environment amenable requirement of energy saving.The utility model simplicity of design is reasonable, and is easy to process, long service life.

Description of drawings

Fig. 1 is the generalized section of the utility model critical piece.

Embodiment

The utility model is described in detail as follows with reference to accompanying drawing:

As shown in the figure, the 1st, valve rod, the 2nd, valve gap, the 3rd, backing ring, the 4th, lining, the 5th, rubber cushion, the 6th, O type cushion rubber, the 7th, retaining pad is that locking is female, the 9th, spring, the 10th, packing ring, the 11st, nut, the 12nd, nut, the 13rd, rivet.

Backing ring 3 is fitted on the shoulder of valve rod 1, and in the annular groove of O type cushion rubber 6 inlay bushers 4, rubber cushion 5 is installed on the shoulder of lining 4, and portion's piece installing of then portion's piece installing of lining 4 being inserted valve rod 1 makes the bottom surface of lining 4 combine with the sealing of backing ring 3 end faces; The combinations thereof part inserted from the bottom hole of valve gap 2 rubber cushion 5 is close on the endoporus shoulder of valve gap 2, afterwards retaining pad 7 is packed into the upper end of lining 4 and be placed on the end face of valve gap 2, fixing with two rivets 13, again the female thread of locking female 8 is cooperated with the external screw thread of lining 4 and tighten, then spring 9 and packing ring 10 successively put into the upper end hole of locking female 8 from the small end of valve rod 1, last screw thread place and the holddown spring that again nut 11 and nut 12 successively is tightened in the small end of valve gap 2.

The utility model can prevent medium along the valve rod external leakage, modern design, and advantages of simple, easy to process, long service life.

Claims

1, a kind of valve that is used for prevents the outer structure of revealing, and it is characterized in that it comprises that mainly valve rod, valve gap, backing ring, lining, rubber cushion, O type cushion rubber, retaining pad, locking mother, spring, packing ring and nut constitute; Backing ring is fitted on the shoulder of valve rod, and in the annular groove of O type cushion rubber inlay busher, rubber cushion is installed on the shoulder of lining, and portion's piece installing that valve rod is inserted in portion's piece installing of lining makes the bottom surface of lining combine with the sealing of backing ring end face; The combinations thereof part is close on the endoporus shoulder of valve gap rubber cushion from the bottom hole insertion of valve gap, and retaining pad packs into the upper end of lining and is placed on the end face of valve gap, fixes with rivet; The female female thread of locking cooperates with the external screw thread of lining to be tightened, and spring and packing ring are successively put into the female upper end hole of locking from the small end of valve rod, and nut screwing clamping is at the screw thread place and the holddown spring of the small end of valve gap.