CN101487548A

CN101487548A - Torque-controllable sealing break valve of arched elastic valve seat

Info

Publication number: CN101487548A
Application number: CNA2008100014189A
Authority: CN
Inventors: 戴学祥
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-01-17
Filing date: 2008-01-17
Publication date: 2009-07-22

Abstract

The invention relates to an arch elastic valve seat sealing disconnecting valve which can control moment and mainly comprises parts such as a valve body, a valve cover, a valve handle, a valve clack, a valve seat and the like. The valve handle passes through an inner hole of a valve clack cover and is connected with the valve clack at the lower end. The screw thread of the valve clack cover and the screw thread of the valve clack are screwed together to form a screw thread pair. The upper end of the valve clack cover is contacted with the valve cover to make up an upper face of the valve. The steps of the valve body is internally provided with the valve seat, the excircle and the lower end of which are respectively contacted with the excircle and the place surface of the steps on the valve body. The lower end of the inner circle of the valve body is fixed with the steps of a ring groove of the valve body in a welding manner. The excircle of the small end of the valve body is provided with a moment indicator. A pointer is arranged on a hub of a handwheel. When the valve clack walks to the sealing face of the valve seat, the pointer can indicate the unit of the moment. The flow passage of the valve body is provided with a ring dovetail groove, the inclined planes of which are respectively contacted with arch sides of the valve seat and the plane at the lower end of the which is contacted with the plane of dovetail groove of the valve body to form the lower sealing of the valve body and the valve seat. The disconnecting valve has the advantages of good sealing performance, small closing moment and saving materials, etc.

Description

The sealing break valve of arched elastic valve seat of torque-controllable

Technical field

The present invention relates to the sealing break valve of arched elastic valve seat of controlling valve, the especially torque-controllable of water, gas, wet goods medium in a kind of fluid industry pipe network.

Background technique

The working principle of stop valve (accompanying drawing 7) is to drive valve rod by handwheel, pass through Stem Mut, the center line that connects flap longshore current body is made the valve for general use of vertical displacement movement form, this valve belongs to forced seal formula valve, so when throttle down, must apply certain impacting force to flap, do not leak with the sealing surface of forcing valve, the frictional force that the required resistance that overcomes of steering force is valve rod and filler with by the thrust that pressure produced of medium, make sealing surface of seat produce plastic deformation by the axial force that is applied on the valve rod, to compensate the nao-and micro relief on surface, gap on the sealing surface is reduced, reach sealing surface and fit tightly stoping passing through of fluid, thereby reach the purpose of sealing.

During valve opening, stem lower portion the conical surface and the endoporus conical surface on the valve gap form to cooperate, become the last sealing surface of valve, in case lost efficacy afterwards medium internally outside the flow valves because of filler.

Open-shut device is made up of flap and valve seat, be equipped with in the flap and split annulus, (this part was cut into using from center line in when assembling), it forms Spielpassung with valve rod, flap respectively, the sealing surface of valve seat and flap is generally the plane (for against corrosion and wear-resisting, how in the plane built-up welding stainless steel), the valve of the type is used very wide on the fluid industrial installation.

Because the sealing pair assembly of above-mentioned valve is not an absolute rigidity, under the effect of sealing force or under the influence of factors such as variation of temperature, physical dimension can change thereupon, and this just can change the interaction force between the sealing pair, the consequently reduction of sealability.

Except the elasticity of material itself and influencing the sealability of compressive strength, the size of steering force also can have influence on the using effect of valve, moment is not enough can be not closed completely and to cross moment and can damage its sealing surface, and valve can produce leakage and influence the safe operation of equipment in this case.

Summary of the invention

In order to overcome the deficiency of above-mentioned valve technology, the invention provides a kind of sealing break valve of arched elastic valve seat of may command moment, the elastic seat of this valve and the sealing of flap not only can realize fitting tightly, and close the moment controlled amount in needed scope.

To achieve the above object, solution of the present invention is: valve rod passes flap lid endoporus, the lower end contacts with flap, the screw thread of flap lid screws into screw pair with the screw thread of flap, flap covers end and contacts the last sealing surface of forming valve with valve gap, in the step of valve body, establish valve seat, its cylindrical and lower end respectively with valve body on step cylindrical and plane contact, circle lower end and valve body annular groove step place are fixed with welding manner in the valve seat, on the cylindrical of valve gap small end, establish the moment direction board, establish pointer on the wheel hub of handwheel, when flap walks to sealing surface of seat, pointer can be indicated the unit of moment, in the runner of valve body, establish annular dovetail slot, its inclined-plane touches with the arch edge joint of valve seat respectively, and the plane of following Transverse plane and valve body dovetail groove is in contact with one another the lower seal that constitutes valve body and valve seat.

Adopt the effect that is produced behind the such scheme as follows:

The a good seal performance: if black box in use produces rigidity when not enough, the release of the elasticity pretightening force of arch valve seat can stop flowing of medium still can reach sealing.

The b operational torque is little: because the degree of the resiliently deformable of the operation moment of torsion of valve and seat material is relevant, the material deformation amount is little, and it is big that required axial force is wanted, and big, the needed moment of closing of material deformation amount is less.

The c economical with materials: flap covers that sealing has not only improved sealing effect on the plane contact formula of end, and the sealing pair compact structure, can reduce the center height of valve body.

D valve rod intensity height: no divided ring slot type valve rod more meets standard-required, improved valve in use valve rod to the stability of sealing force and temperature variation.

E closes the power indication: the valve closing steering force is not subjected to the influence of manpower size factor, and sign board can clearly be indicated current moment information on the throne intuitively.

Description of drawings

Below in conjunction with accompanying drawing in detail concrete structure of the present invention and operational detail thereof are described in detail

Section of structure when Fig. 1 is a valve closing of the present invention.

Section of structure when Fig. 2 is a valve opening of the present invention.

Fig. 3 is the enlarged view of moment direction board.

Fig. 4 is the enlarged view of sealing configuration section on flap lid of the present invention and the valve gap.

Fig. 5 is that valve seat of the present invention is assemblied in the profile in the dovetail groove.

Fig. 6 is the enlarged view of welding type valve seat construction section of the present invention.

Fig. 7 is commercially available common stop valve structure sectional drawing.

Fig. 8 is the commercially available common stop valve valve rod of Fig. 7, flap lid, splits the circle structure profile.

Label is among Fig. 7: 201, valve body, 202, valve seat, 203, split annulus, 204, valve gap, 205, valve rod, 206, Stem Mut, 207, handwheel, 208, sealing surface on the valve gap, 209, sealing surface on the valve rod, 310, the flap lid, 311, flap.

Label is among Fig. 1: 101, valve body, 102, valve seat, 103, flap, 104, the flap lid, 105, valve gap, 106, valve rod, 107, the moment direction board, 108, pointer, 109, handwheel, 210, locking nut, 211, Stem Mut, 212, Gland, 213, go up sealing surface.

Embodiment

1. valve rod (106) endoporus, the lower end of passing flap lid (104) contacts with flap (103), the screw thread of flap lid (104) screws into screw pair with the screw thread of flap (103), and flap lid (104) upper end contacts the last sealing surface (213) of forming valve with valve gap (105).

2. in the step of valve body (101), establish valve seat (102), its cylindrical and following Transverse plane respectively with valve body (101) on step cylindrical and plane be in contact with one another, the step place of the interior round lower end of valve seat (102) and valve body (101) annular groove is fixed with welding manner.

3. big end endoporus, the Gland (212) of valve rod (106) by valve gap (105), be combined into screw pair with Stem Mut (211).

4. Stem Mut (211) passes microcephaly's endoporus on the valve gap (105), handwheel (109) suit in the top on the step of cylindrical, and mutual connection is locked by locking nut (210).

5. establish moment direction board (107) on the cylindrical of valve gap (105) small end, establish pointer (108) on the wheel hub of handwheel (109), when flap (103) walked to valve seat (102) sealing surface, pointer (108) can be indicated the unit of moment.

Mode of execution two

Establish annular dovetail slot in the runner of valve body (101), its inclined-plane touches with the arch edge joint of valve seat (102) respectively, and the plane of following Transverse plane and valve body (101) dovetail groove is in contact with one another the lower seal that constitutes valve body and valve seat.

Claims

1, a kind of sealing break valve of arched elastic valve seat of may command moment mainly is made up of parts such as valve body, valve gap, valve rod, flap, valve seats; Valve rod (106) passes flap lid (104) endoporus, the lower end contacts with flap (103), and flap lid (104) screw thread screws into screw pair with flap (103) screw thread, and flap lid (104) upper end contacts the last sealing surface (213) of forming valve with valve gap (105).

2, the sealing break valve of arched elastic valve seat of may command moment according to claim 1, in the step of valve body (101), establish valve seat (102), its cylindrical and following Transverse plane respectively with valve body (101) on step cylindrical and plane be in contact with one another, the step place of the interior round lower end of valve seat (102) and valve body (101) annular groove is fixed with welding manner.

3, the sealing break valve of arched elastic valve seat of may command moment according to claim 1 is established moment direction board (107) on the cylindrical of valve gap (105) small end, establish pointer (108) on the wheel hub of handwheel (109).

4, the sealing break valve of arched elastic valve seat of may command moment according to claim 1, in the runner of valve body (101), establish annular dovetail slot, its inclined-plane touches with the arch edge joint of valve seat (102) respectively, and the plane of following Transverse plane and valve body (101) dovetail groove is in contact with one another the lower seal that constitutes valve body and valve seat.