CN202451866U

CN202451866U - Improved soft sealing gate valve

Info

Publication number: CN202451866U
Application number: CN2012200139928U
Authority: CN
Inventors: 杨刚保; 林主送; 朱兢兢
Original assignee: KAITAI VALVE (GROUP) CO Ltd
Current assignee: KAITAI VALVE (GROUP) CO Ltd
Priority date: 2012-01-13
Filing date: 2012-01-13
Publication date: 2012-09-26
Anticipated expiration: 2022-01-13

Abstract

The utility model discloses an improved soft sealing gate valve. A valve cover is arranged on the top of a valve body, and a sealing ring is arranged between the valve cover and the valve body; a gland is arranged on the top of the neck of the valve cover; a nut is fixedly connected with the top of a gate plate and positioned in the valve body; a valve rod is provided with an external thread and penetrates the gland and the neck of the valve cover; the top of the valve rod is connected with a hand wheel, and the bottom of the valve rod is screwed into the nut; a dustproof ring is sleeved on the valve rod and embedded into the top of the gland; guide rail ribs are arranged on two lateral surfaces in the valve body; a shaft sleeve is sleeved on the valve rod and positioned on an inner ring at the neck of the valve cover; a sealing gasket is arranged between the shaft sleeve and a step at the neck of the valve cover; one O-shaped ring is arranged between the shaft sleeve and the valve rod, and the other O-shaped ring is arranged between the shaft sleeve and the inner ring at the neck of the valve cover; an arc-shaped flange is arranged on each of two sides of the upper part of the gate plate and is in linear contact with the sealing surface of the valve body; guide rail grooves are formed in the arc-shaped surfaces on two sides of the upper part of the gate plate and mosaic in the guide rail ribs on the two lateral surfaces of the valve body; and two parallel convex edges are arranged on the arc-shaped surfaces on two sides of the lower part of the gate plate. The gate valve overcomes the defects of the conventional gate valve, parts of the valve are protected, and the service life of the valve is prolonged.

Description

The improved type soft sealing gate valve

Technical field

The utility model relates to a kind of improved type soft sealing gate valve.

Background technique

Soft sealing gate valve is because of its exquisite forging type, the electrostatic plastic spraying environment-protecting asepsis that the foundry goods inner and outer surface is complete, the vulcanization of rubber technology of flashboard; Level and smooth unnotched structure of valve inner and good sealing property are widely used in municipal administration, water conservancy; Petrochemical industry, sewage treatment is smelted; In the industries such as electric power, can be used for water delivery, in the transporting system of water distribution, diving, sewage pump house and oil, chemical industry fluid.

But the present certain defective of soft sealing gate valve ubiquity, its in use for some time, flashboard rubber is prone to aging, leaks in occurring.Valve stem packing ring damages often, when changing Sealing, needs shutdown system, can not be with press operation.When flashboard and valve body form sealing pair usually, mostly be the face contact, sealing surface is wide, and moment of torsion will increase, and so not only improves the cost of valve, lets valve increase because of opening and closing moment more easily, and influences its working life.Also have because machining accuracy is when putting in place inadequately, valve rod produces hard grind with valve gap easily and wipes, and the layer of moulding on the casting surface also is easy to come off, thereby makes foundry goods lose surface protection, and the generation corrosion will produce pollution when being applied to live clean water.In the additional valves opening-closing process, the flashboard of the vulcanization of rubber and valve body are the band press operations, so that the band guide groove or the rubber flashboard of leading muscle are easy to squeezed is broken, ironcasting comes out, and not only influences the sealing of valve, also to water quality generation secondary pollution.

Summary of the invention

The utility model technical problem to be solved provides a kind of improved type soft sealing gate valve, and this soft sealing gate valve has overcome the defective of traditional gate valve, solves valve seal and does not sternly leak the problem that leaks outside in occurring; Can need not halt system when changing Sealing; Guaranteeing to be with press operation under the prerequisite that does not leak outside, preventing directly to contact the dry friction that causes with valve gap, alleviating the damage of medium flashboard because of valve rod rotates; Effectively protect valve components, improved the working life of valve.

For solving the problems of the technologies described above; The utility model improved type soft sealing gate valve comprises valve body, valve gap, valve rod, nut, flashboard, handwheel, gland, dust ring and seal ring; Said valve gap is located at said valve body top through bolt; Said seal ring is located between said valve gap and the valve body, and said gland is located at said valve gap neck top, and said nut is fixedly connected said flashboard top and is positioned at said valve body; Said valve rod is provided with outside thread and penetrates said gland and the valve gap neck; Said valve stem tip through bolt connect said handwheel, twist in said nut the bottom, said dust ring is inserted in said valve rod and embeds said gland top, bi-side are provided with the guide rail muscle in the flashboard position in the said valve body; This soft sealing gate valve also comprises axle sleeve, gasket seal, guide-track groove, an O type circle and the 2nd O type circle; Said axle sleeve is inserted in said valve rod and is positioned at said valve gap neck inner ring, and said gasket seal is located between said axle sleeve and the valve gap neck step, and a said O type circle is located between said axle sleeve and the valve rod; Said the 2nd O type circle is located between said axle sleeve and the valve gap neck inner ring; Both sides, said flashboard top are provided with curved flanges and constitute line with said valve body sealing surface and contact, and said guide-track groove is located at said flashboard top both sides arc shaped surface and is embedded in the guide rail muscle of said valve body bi-side, and both sides, said flashboard bottom arc shaped surface is provided with two parallel fins.

Because the utility model improved type soft sealing gate valve has adopted technique scheme, promptly the valve gap of this soft sealing gate valve is located at the valve body top, and seal ring is located between valve gap and the valve body; Gland is located at valve gap neck top, and nut is fixedly connected the flashboard top and is positioned at valve body, and valve rod is provided with outside thread and penetrates gland and the valve gap neck; Valve stem tip through bolt connect handwheel, twist in nut the bottom; Dust ring is inserted in valve rod and wedge pressure caping end, and bi-side are provided with the guide rail muscle in the flashboard position in the valve body, and axle sleeve is inserted in valve rod and is positioned at valve gap neck inner ring; Gasket seal is located between axle sleeve and the valve gap neck step; The one O type circle is located between axle sleeve and the valve rod, and the 2nd O type circle is located between axle sleeve and the valve gap neck inner ring, and both sides, flashboard top are provided with curved flanges and constitute line with valve body sealing surface and contact; Guide-track groove is located at flashboard top both sides arc shaped surface and is embedded in the guide rail muscle of valve body bi-side, and both sides, flashboard bottom arc shaped surface is provided with two parallel fins.This soft sealing gate valve has overcome the defective of traditional gate valve; Solve valve seal and sternly do not leak the problem that leaks outside in occurring, can need not halt system when changing Sealing, under the prerequisite that assurance does not leak outside, can be with press operation; Prevented directly to contact the dry friction that causes with valve gap because of valve rod rotates; Alleviated the damage of medium, effectively protected valve components, improved the working life of valve flashboard.

Description of drawings

Below in conjunction with accompanying drawing and mode of execution the utility model is done further to specify:

Fig. 1 is the structural representation of the utility model improved type soft sealing gate valve;

Fig. 2 is the enlarged view of A portion among Fig. 1;

Fig. 3 is the structural representation of flashboard in the utility model improved type soft sealing gate valve;

Fig. 4 be among Fig. 3 B-B to schematic representation;

Fig. 5 be among Fig. 3 C-C to schematic representation.

Embodiment

Extremely shown in Figure 5 like Fig. 1; The utility model improved type soft sealing gate valve comprises valve body 1, valve gap 2, valve rod 4, nut 6, flashboard 5, handwheel 3, gland 7, dust ring 8 and seal ring 11; Said valve gap 2 is located at said valve body 1 top through bolt 22; Said seal ring 11 is located between said valve gap 2 and the valve body 1; Said gland 7 is located at said valve gap neck 21 tops; Said nut 7 is fixedly connected said flashboard 5 tops and also is positioned at said valve body 1, and said valve rod 4 is provided with outside thread and penetrates said gland 7 and valve gap neck 21, said valve rod 4 tops through bolt 31 connect said handwheel 3, the bottom is twisted in said nut 6 in and through said handwheel 3 rotations and is driven said flashboard 5 up-downs; Said dust ring 8 is inserted in said valve rod 4 and embeds said gland 7 tops; Bi-side are provided with guide rail muscle 12 in flashboard 5 positions in the said valve body 1, and this soft sealing gate valve also comprises axle sleeve 9, gasket seal 93, guide-track groove 53, an O type circle 91 and the 2nd O type circle 92, and said axle sleeve 9 is inserted in said valve rod 4 and is positioned at said valve gap neck 21 inner rings; Said gasket seal 93 is located between said axle sleeve 9 and valve gap neck 21 steps; A said O type circle 91 is located between said axle sleeve 9 and the valve rod 4, and said the 2nd O type circle 92 is located between said axle sleeve 9 and valve gap neck 21 inner rings, and both sides, said flashboard 5 top are provided with curved flanges 51 and constitute line with said valve body 1 sealing surface and contact; Said guide-track groove 53 is located at said flashboard 5 top both sides arc shaped surface and is embedded in the guide rail muscle 12 of said valve body 1 bi-side, and both sides, said flashboard 5 bottom arc shaped surface is provided with two parallel fins 52.

Increased an axle sleeve that material is engineering plastics (POM) at valve rod and valve cover chamber in this soft sealing gate valve; It has good wear resistance, and its fatigue resistance, self lubricity and highly polished have the good performance that is sealed and matched with Sealing; Its friction ractor is little; The direct friction of valve rod and valve gap has been avoided in the existence of axle sleeve, effectively reduces the loss of component, improves the working life of whole deck valve door; Simultaneously between axle sleeve and valve gap neck step, having increased a slice material is the gasket seal of polytetrafluoroethylene (PTFE), and the PTFE anti-corrosion capability is strong, and friction ractor is little; Plasticity is good, and certain elasticity is arranged, and between sealing, only needs very little power just can reach sealing; The swelling that do not absorb water not can not secreted stickum yet, and valve rod and valve gap directly friction and the wearing and tearing that bring have not only been avoided in the increase of gasket seal, has alleviated the open and close torque of valve yet; Damaged at valve rod and sleeve sealing spare simultaneously, when leakage needs to change Sealing, because gasket seal is in valve rod axial force and valve cover chamber sealing; Stoped and leaked outside; This moment, pipe-line system need not to close, and just can under situation with pressure, directly change Sealing.

Arc shaped surface is provided with guide-track groove that material is a nylon (PA) and cooperates with the guide rail muscle of valve body this soft sealing gate valve in the both sides, top of integral coating rubber flashboard in addition; PA not only has very high hardness and fatigue strength, good impact toughness, and also have excellent wear-resisting and self lubricity; Avoided flashboard like this in opening-closing process; The rubber-coated flashboard and the wearing and tearing of valve body have solved rubber and have been easy to wearing and tearing, and friction ractor is high; Defectives such as intensity is low have prevented that rubber from being squeezed the phenomenon of leaking in broken the appearance; In the sealing of flashboard and valve body, change the face way of contact in the past simultaneously, be provided with curved flanges in both sides, flashboard top and contact the realization sealing with valve body sealing surface formation line; The sealing surface that tradition is wide not only is difficult to guarantee sealing, and open and close torque is increased; Rubber seal face is easy abrasion more; Wearing and tearing back maintenance difficult causes valve to be scrapped, and is unfavorable for the energy-conserving and environment-protective requirement; And seal with the line mode, not only solve above problem, and reduced the pretension sealing force, improved flashboard working life.Be the double sealing of two of groove parallel fins formations in the middle of arc shaped surface is provided with in both sides, flashboard bottom simultaneously with the valve body bottom; And traditional flashboard is merely the single track sealing; So strengthened the sealing of flashboard and valve body bottom greatly; Further prevent the generation of valves leakage, be convenient to the maintenance and the operation of valve, greatly promoted the total quality of valve.

This soft sealing gate valve has effectively overcome valve seal and has not sternly leaked and the problem that leaks outside in occurring; Can not need halt system when changing valve sealing element, guarantee to be with press operation under the prerequisite that does not leak outside, prevent directly to contact the dry friction that causes with valve gap because of valve rod rotates; Thereby the component of valve have been protected; Effectively improved the working life of valve, flashboard increases guide-track groove and has alleviated the destruction of medium to flashboard simultaneously, satisfies the user demand of soft sealing gate valve.

Claims

1. improved type soft sealing gate valve; Comprise valve body, valve gap, valve rod, nut, flashboard, handwheel, gland, dust ring and seal ring, said valve gap is located at said valve body top through bolt, and said seal ring is located between said valve gap and the valve body; Said gland is located at said valve gap neck top; Said nut is fixedly connected said flashboard top and is positioned at said valve body, and said valve rod is provided with outside thread and penetrates said gland and the valve gap neck, said valve stem tip through bolt connect said handwheel, twist in said nut the bottom; Said dust ring is inserted in said valve rod and embeds said gland top; Bi-side are provided with the guide rail muscle in the flashboard position in the said valve body, and it is characterized in that: also comprise axle sleeve, gasket seal, guide-track groove, an O type circle and the 2nd O type circle, said axle sleeve is inserted in said valve rod and is positioned at said valve gap neck inner ring; Said gasket seal is located between said axle sleeve and the valve gap neck step; A said O type circle is located between said axle sleeve and the valve rod, and said the 2nd O type circle is located between said axle sleeve and the valve gap neck inner ring, and both sides, said flashboard top are provided with curved flanges and constitute line with said valve body sealing surface and contact; Said guide-track groove is located at said flashboard top both sides arc shaped surface and is embedded in the guide rail muscle of said valve body bi-side, and both sides, said flashboard bottom arc shaped surface is provided with two parallel fins.