CN212839472U

CN212839472U - Friction-free parallel type double-gate-plate gate valve

Info

Publication number: CN212839472U
Application number: CN202021821345.0U
Authority: CN
Inventors: 刘凯; 张�杰; 徐玉美; 倪燕
Original assignee: Jiangsu Shentong Valve Co Ltd
Current assignee: Jiangsu Shentong Valve Co Ltd
Priority date: 2020-08-27
Filing date: 2020-08-27
Publication date: 2021-03-30
Anticipated expiration: 2030-08-27

Abstract

The utility model provides a no friction run-in double gate disc gate valve, includes flashboard, voussoir, the piece that rises, spring, cylinder piston rod, and the voussoir upper end is equipped with the dovetail groove, with cylinder piston rod head fixed connection, voussoir both sides outer inclined plane and the piece that rises inner inclined plane sliding fit, and the flashboard back is equipped with the location axle, is equipped with the hole in the middle of the voussoir, location axle and hole tolerance fit, and the spring runs through flashboard, the piece that rises and voussoir, and both ends are passed through the. The beneficial effects of the utility model are that, effectively prevent the medium turbulent flow, erode sealed face, effectively reduce the vibration range, prevent that the double-gate board from colliding the sealed face of disk seat, still can effectively reduce impurity and get into fit clearance, prevent the action card and hinder.

Description

Friction-free parallel type double-gate-plate gate valve

Technical Field

The utility model relates to a no friction run-in double gate disc gate valve.

Background

At present, the structure of a parallel double-gate valve generally comprises an air cylinder, a valve body, a valve cover, a double-gate plate, a wedge block and an expansion block. Wherein, piston rod of the cylinder, double gate board, voussoir and the piece that rises are at valve body inner chamber mechanical connection, and the structure is redundant, and the cumulative fit clearance is big, has following three hidden danger: medium turbulence is easily caused in the opening and closing process, and the sealing surface is washed; the double gate plate is easy to vibrate violently due to large fit clearance and collide with the sealing surface of the valve seat; impurities in the medium enter the fit clearance, so that the action jamming is easily caused, and the service life of the valve is seriously shortened.

SUMMERY OF THE UTILITY MODEL

In order to overcome the prior art problem, the utility model provides a no friction run-in double gate disc gate valve.

The technical scheme of the utility model, a no friction run-in double gate disc gate valve, including flashboard, voussoir, the piece that rises, spring, piston rod of the cylinder, the voussoir upper end is equipped with the dovetail groove, with piston rod of the cylinder head fixed connection, voussoir both sides outer inclined plane and the piece that rises inner inclined plane sliding fit, and the flashboard back is equipped with the location axle, is equipped with the hole in the middle of the voussoir, location axle and hole tolerance cooperation, spring run through the flashboard, the piece that rises and voussoir, and the fixed plate is fixed on the flash.

The beneficial effects of the utility model are that, pass through the spring with the voussoir, the piece that rises with the double-gate board is connected as a whole, effectively prevents the medium turbulent flow, erodees sealed face, effectively reduces vibration amplitude, prevents that the double-gate board from colliding the sealed face of disk seat, still can effectively reduce impurity and get into fit clearance, prevents the action card and hinders.

By adopting the double-gate-plate gate valve with the structure, the valve plate and the valve seat sealing surface can be quickly separated by means of spring force in the opening and closing process, so that no friction is really realized, the action is reliable and stable, and the service life is long.

Drawings

FIG. 1 is a schematic sectional view of a valve in a closed state;

FIG. 2 is a schematic sectional view of the valve at the moment of opening;

fig. 3 is an exploded view of the valve chamber components.

In the figure: 1. a cylinder; 2. a packing gland; 3. a filler; 4. a valve cover; 5. a valve body; 6. a wedge block; 7. expanding blocks; 8. a shutter plate; 9. a fixing plate; 10. a spring; 11. and a cylinder piston rod.

Detailed Description

As shown in the figure, a frictionless parallel type double-gate-plate gate valve comprises a gate plate 8, a wedge block 6, an expansion block 7, a spring 10 and a cylinder piston rod 11, wherein a trapezoidal groove is formed in the upper end of the wedge block 6 and is fixedly connected with the head of the cylinder piston rod 11, the outer inclined surfaces of two sides of the wedge block 6 are in sliding fit with the inner inclined surfaces of the expansion block 7, a positioning shaft is arranged on the back of the gate plate 8, a hole is formed in the middle of the wedge block 6, the positioning shaft is in tolerance fit with the hole, the spring 10 penetrates through the gate plate 8, the expansion block 7.

As shown in fig. 1, when the valve is in a closed state, the double gate plate 8 is tightly attached to the valve seats on both sides of the valve body 4, and has sufficient specific sealing pressure to ensure the sealing performance of the valve.

As shown in figure 2, when the valve needs to be opened, a piston rod of the air cylinder 1 pulls the wedge block 6 to move upwards, the expansion block 7 and the flashboard 8 are folded towards the middle, the sealing surface of the flashboard 8 is quickly separated from the valve seats on two sides of the valve body 4, and frictionless opening and closing are realized.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. The utility model provides a no friction run-in double gate disc gate valve, includes flashboard, voussoir, the piece that rises, spring, cylinder piston rod, its characterized in that, the voussoir upper end is equipped with the dovetail groove, with cylinder piston rod head fixed connection, voussoir both sides outer inclined plane and the piece that rises inner inclined plane sliding fit, the flashboard back is equipped with the location axle, be equipped with the hole in the middle of the voussoir, location axle and hole tolerance cooperation, the spring runs through the flashboard, the piece that rises and voussoir, and both ends are passed through the fixed plate and are fixed on the flash.