CN2242377Y

CN2242377Y - Soft sealing gate valve

Info

Publication number: CN2242377Y
Application number: CN 94214021
Authority: CN
Inventors: 宋怀利
Original assignee: No2 Valve Factory Of Tianjin Valve Corp
Current assignee: No2 Valve Factory Of Tianjin Valve Corp
Priority date: 1994-06-10
Filing date: 1994-06-10
Publication date: 1996-12-11
Anticipated expiration: 2004-06-10

Abstract

The utility model relates to the improvement of the structure of a gate valve, which is a soft sealing gate valve. The utility model solves the problems of copper material consumption, short service life, strong torque force and poor sealing performance of the original gate valve in a wedge type. The soft sealing gate valve changes the gate plate in the wedge type into an encapsulated gate valve with a sealing layer of flexible material on the foundation of the original gate valve. The original valve body is changed into the valve body with an inner cavity bottom in a straight-way type. The improved valve has good sealing performance, 1/3 working time saving, 1.6 kg/table copper material saving (DN100) and long service life.

Description

Soft sealing gate valve

The utility model relates to a kind of improvement of gate valve structure.

Gate valve of the prior art mainly is the wedge-type structure, comprises parts compositions such as valve body, valve gap, flashboard, valve rod, Stem Mut, stuffing box, and the wedge-type flashboard is realized hard sealing by the groove fit with the valve body bottom.Its deficiency is: big, the effort of operation torsion, and adjusting function is poor, and the valve body bottom is fluted, accumulate foreign material easily, break down, and sealing surface when valve opening and closing, be mingled with easily flowing medium with solid particle, sealing surface is damaged cause water leakage phenomenon, hard in addition sealing needs with steel more.

It is low that the purpose of this utility model provides a kind of cost, saves raw material, do not use long soft sealing gate valve of copper material good airproof performance and life-span.

The utility model mainly is made of valve body, valve gap, stuffing box, Gland and valve rod, it is characterized in that having and in the valve body of straight-through type internal control bottom its periphery is housed and is surrounded by the flashboard that the soft material sealing layer is a rubber sealant, the Stem Mut in flashboard is risen as high as the banks by side mounted thereto and valve rod lower end are with being threaded.

The utility model specific embodiment accompanying drawings is as follows:

Fig. 1 soft sealing gate valve structure sectional view

As shown in the figure, have in the valve body 2 of straight-through type intracavity bottom the flashboard 1 that its periphery is surrounded by rubber sealant 9 is installed, the valve plate top has a rectangular and rises as high as the banks, in four directions Stem Mut 3 is set in and rises as high as the banks, and this nut is connected by the lower end of screw thread with valve rod 4, square structure is identical with former Wedge gate valve on the valve body, and promptly the valve body top connects valve gap 5, stuffing box 6, Gland 7 and square toes 8 successively.Rotate square toes during use valve rod is rotated, drive flashboard by the Stem Mut that cooperates with valve rod and move up and down, thereby realize the keying of valve, when valve closing, the boss on flashboard both sides is pressure crouching on other in valve body just in time.

Advantage of the present utility model and effect: 1, the no groove in valve body through type bottom, not long-pending Deposit foreign material, the smooth flow resistance of inner chamber is little, and does not damage the sealing surface of rubber-coating flashboard, makes sealing Dependable performance; 2, body cavity adopts electrostatic painting process, and the non-corroding phenomenon is not dirty Dye the medium composition that passes through; 3, flashboard adopts the skeleton encapsulate, and body cavity is not done and appointed What machined so saved 0.4 hour/platform in man-hour (DN100) than in the past, is namely saved the worker The time 1/3; 4 Wedge Gate Valves need 4 of copper sealing rings, and service time is shorter, after the improvement not Need any copper spare, then every valve is saved copper material 4 * 0.4=1.6Kg/ platform (DN100); 5, Because it is little that the soft seal flashboard opens and closes moment, so valve is longer service life.

Claims

1, a kind of soft sealing gate valve that mainly constitutes by valve body, valve gap, stuffing box, Gland and valve rod, it is characterized in that having and in the valve body of straight-through type internal control bottom its periphery is housed and is surrounded by the flashboard that the soft material sealing layer is a rubber sealant, the Stem Mut in flashboard is risen as high as the banks by side mounted thereto and valve rod lower end are with being threaded.