CN205639845U - Sandwich valve - Google Patents

Abstract

The utility model discloses a sandwich valve, including valve body, valve gap, valve plate cover, valve plate, valve rod, disk seat, drive arrangement, the valve rod lower extreme is connected with the valve plate cover, and upper end and the drive arrangement of valve rod are connected, and the upper and lower end of valve body, valve gap links together respectively, and valve rod, valve plate cover and valve plate assembly are in the valve body, and the disk seat setting is equipped with the spacing step of vertical direction between disk seat and the valve body in the cavity that valve body and valve gap limitd, and overlap and seal through gland, gland lock nut, filler pressure between valve rod and the valve gap, sandwich valve still is equipped with the packing box between gland and gland lock nut. The utility model discloses a sandwich valve is equipped with the packing box between gland and gland lock nut, it has had double -deck sealing to make between valve rod and the valve body, after the seal wear between valve body filler and the valve rod leaks, through sealing of packing box, can make the valve can continue to use.

Description

A kind of sandwich valve

Technical field

This utility model relates to valve technology field, particularly relates to a kind of sandwich valve.

Background technology

Valve is the control parts in fluid delivery system, has the functions such as cut-off, regulation, water conservancy diversion, voltage stabilizing, shunting, overflow pressure relief, can be used for controlling the flowing of all kinds fluids such as sky gas and water, steam, various Korrosionsmedium, mud, liquid metals.

Valve of a great variety, wherein sandwich valve is the special valve for blocking operation on pipeline, in the closure threeway being arranged on pressure line, is used for taking up tapping machine and carries out press and open holes, use plugging device closure pressure line, complete the operations such as the repairing of pipeline, construction.

Typically sealed by filler pressing sleeve, gland and gland locking nut between existing sandwich valve its valve rod and valve body, gland is pressed on filler pressing sleeve and makes filler compression valve rod generation side force make valve stem seal, such single track is sealed in after filler uses for a long time, filler is easily subject to the impact of the factors such as abrasion, erosion, aging, temperature, gradually lose compactness and cause seepage, make seal failure, affect the service life of valve.

Utility model content

For the problems referred to above, this utility model purpose is to provide the sandwich valve of a kind of band multiple tracks double-layer seal gland, and the sealing making valve body is more firm, and valve is longer for service life.

To achieve these goals, the technical solution of the utility model is as follows:

A kind of sandwich valve, including valve body, valve gap, valve plate set, valve plate, valve rod, valve seat, driving means, described valve rod lower end is connected with valve plate set, the upper end of valve rod is connected with driving means, valve body, valve gap upper, lower end is respectively connected together, valve rod, valve plate set and valve plate are assemblied in valve body, valve seat is arranged in the cavity that valve body and valve gap define, the limited step of vertical direction it is provided with between valve seat and valve body, gland is passed through between valve rod and valve gap, gland locking nut, filler pressing sleeve seals, described sandwich valve is additionally provided with stuffing-box between gland and gland locking nut.

A kind of preferred version of the present utility model, the one side of described valve seat is connected with valve body by elastic device, face seal between another side and the valve plate side of valve seat.

Another kind of preferred version of the present utility model, described driving means is cylinder, and described cylinder lower end is provided with cylinder connection dish, and cylinder is connected with valve gap by connection dish, and cylinder piston is socketed in the top of valve rod, and band ovable valve stem moves up and down together.

Sandwich valve of the present utility model, it is provided with stuffing-box between gland packing airtight and watertight padding gland and gland locking nut, make to have had between valve rod and valve body double-layer seal, after sealing wear leakage between valve body filler and valve rod, sealed by the second of stuffing-box between gland locking nut and gland, make valve be continuing with, extend valve service life.

Accompanying drawing explanation

Fig. 1 is this utility model sandwich valve structure chart.

Detailed description of the invention

In order to make technological means of the present utility model and implementation be apparent to, this utility model is expanded on further below in conjunction with specific embodiment.

Seeing Fig. 1, sandwich valve of the present utility model, mainly include that valve body 1, valve gap 7, valve plate set 3, valve plate 4, valve rod 13, valve seat 2 and driving means, described valve rod 13 lower end are connected with valve plate set 3, the upper end of valve rod 13 is connected with driving means.

Valve body 1, the upper and lower end of valve gap 7 are respectively connected together, valve rod 13, valve plate set 3 and valve plate 4 are assemblied in valve body 1, valve gap 7 is provided with a depressed part towards the side of valve body 1, a cavity is defined between the depressed part of valve body 1 and valve gap 7, valve seat 2 is arranged in described cavity, and is provided with limited step at vertical direction between valve seat 2 and valve body 1.Sealed by gland 9, gland locking nut 10, filler pressing sleeve 11 between valve rod 13 and valve gap 7, filler 8 is seated in filler pressing sleeve 11, sandwich valve of the present utility model, stuffing-box 12 it is provided with between gland locking nut 10 and gland 9, valve rod 13 is made to have had double-layer seal, after sealing wear leakage between filler pressing sleeve 11 and valve rod 13, can be sealed by the second layer of stuffing-box 12 between gland locking nut 10 and gland 9, make sandwich valve be continuing with, extend valve service life.

Sandwich valve of the present utility model, the one side of valve seat 2 is connected with valve body 1 by elastic device 5,6, face seal between another side and valve plate 4 side of valve seat 2, elastic device 5,6 can make up the abrasion between valve seat 2 and valve plate 4, realizing zero leakage, between valve seat 2 with valve plate 4, face seal is relative answers linear sealing such as ball valve, even if part seals position and is damaged, the part of periphery can continue to play sealing function, improves the service life of sandwich valve；And valve plate 4 valve rod 13 control under open and close up and down time, motion between valve plate 4 and valve seat 2 is shearing motion, the solid dielectric sticked on valve plate 4 or valve seat 2 is easy to be cleaned of, this structure makes that the solid diameter between valve plate 4 and valve seat 2 is the least, it is little to rub, and extends the service life of sandwich valve.

Sandwich valve of the present utility model, valve rod 13 upper end is connected with driving means, in the present embodiment, driving means is cylinder 15, cylinder 15 lower end is provided with connection dish 14 and is connected with valve gap 7, the upper end socket cylinder piston 16 of valve rod 13, cylinder piston 16 band ovable valve stem 13 moves up and down together, connection dish 14 inner space is divided into upper air-pressure chamber and lower air-pressure chamber (being not drawn in figure) by cylinder piston 16, cylinder piston 16 upper end is positioned at air-pressure chamber and is provided with the first anticollision packing ring (being not drawn in figure), cylinder connection dish 14 upper end is positioned at lower air-pressure chamber and is provided with the second anticollision packing ring (being not drawn in figure), in order to control valve door trip stroke.

Of the present utility model principal character, working method and of the present utility model advantage have more than been shown and described.Skilled person will appreciate that of the industry; this utility model is not restricted to the described embodiments; simply principle of the present utility model described in above-described embodiment and description; on the premise of without departing from this utility model spirit and scope, this utility model also has various changes and modifications, and these changes and improvements both fall within the range of claimed this utility model.

Claims (3)

1. null1. a sandwich valve，It is characterized in that: include valve body (1)、Valve gap (7)、Valve plate set (3)、Valve plate (4)、Valve rod (13)、Valve seat (2)、Driving means，Described valve rod (13) lower end is connected with valve plate set (3)，The upper end of valve rod (13) is connected with driving means，Valve body (1)、Valve gap (7) upper、Lower end is respectively connected together，Valve rod (13)、Valve plate set (3) and valve plate (4) are assemblied in valve body (1)，Valve seat (2) is arranged in the cavity that valve body (1) and valve gap (7) define，The limited step of vertical direction it is provided with between valve seat (2) and valve body (1)，By gland (9) between valve rod (13) and valve gap (7)、Gland locking nut (10)、Filler pressing sleeve (11) seals，Described sandwich valve is provided with stuffing-box (12) between gland (9) and gland locking nut (10).
2. Sandwich valve the most according to claim 1, it is characterised in that: the one side of described valve seat (2) is connected with valve body (1) by elastic device (5,6), face seal between another side and valve plate (4) side of valve seat (2).
3. Sandwich valve the most according to claim 1, it is characterized in that: described driving means is cylinder (15), described cylinder (15) lower end is provided with cylinder connection dish (14), cylinder (15) is connected with valve gap (7) by connection dish (14), cylinder piston (16) is socketed in the top of valve rod (13), and band ovable valve stem (13) moves up and down together.