CN206770633U - A kind of bellows stop valve - Google Patents

Abstract

A kind of bellows stop valve is the utility model is related to, it includes：Valve system；Seal assembly, the seal assembly includes being arranged in the valve body and the flap of sealing pair can be formed with the valve seat, lower end is inserted in the valve rod that in the flap and upper end is extended to outside the valve system through the accommodating chamber, the bottom flange being covered at the top of the accommodating chamber, sealed set is in bottom flange top and the branch pipe being set in outside the valve rod, at the top of the branch pipe and the packing seal mechanism being set in outside the valve rod and lower end are welded on the bellows that on the valve rod and upper end is welded on the packing seal actuator base, the bellows-sheathed is located on the valve rod；Governor motion.So as to improve the service life of the reliability of valve sealing face and valve.

Description

A kind of bellows stop valve

Technical field

The utility model belongs to valve field, is related to a kind of stop valve, and in particular to a kind of bellows stop valve.

Background technology

Stop valve is also known as pipe valve valve, belongs to forced seal formula valve, i.e., when valve is closed, it is necessary to applies to flap and presses Power, do not leaked with forced seal face.When medium is by entering valve below flap, the resistance that overcomes required for operating physical force is valve The frictional force of bar and filler and the thrust as caused by the pressure of medium, the power of closing valve is bigger than the power of valve opening door, so valve rod Diameter it is big, the failure of valve rod bending otherwise can occur.It is divided into three kinds by connected mode：Flange connection, screwed connection, welding Connection.

At present, stop valve is widely used in electric power, waterpower, petrochemical industry, metallurgy industry.Existing universal cutoff valves are typically to have Valve body, valve seat, flap, valve rod, bonnet, Packing seat, filler group, handwheel etc. are formed, and by rotating handwheel during work, drive valve Bar rotates.This filler is unsuitable for the low leakage sealed requirement of medium, reduces functional reliability, the security of stop valve, shortens The service life of valve.

The content of the invention

The purpose of the utility model is to provide a kind of bellows stop valve for overcome the deficiencies in the prior art.

To reach above-mentioned purpose, the technical solution adopted in the utility model is：A kind of bellows stop valve, it includes：

Valve system, the valve system include valve body, are opened in the valve body and run through its runner, formation in the valve On internal wall and two guiding ribs extended towards, the valve seat that is fixed on the guiding rib and formed in the body top And the accommodating chamber being connected with the runner；

Seal assembly, the seal assembly include being arranged in the valve body and the valve of sealing pair can be formed with the valve seat Valve, lower end be inserted in the valve rod that in the flap and upper end extended to outside the valve system through the accommodating chamber, be covered on it is described Bottom flange, sealed set at the top of accommodating chamber at the top of the bottom flange and be set in outside the valve rod branch pipe, installed in institute State packing seal mechanism that is at the top of branch pipe and being set in outside the valve rod and lower end is welded on the valve rod and upper end is welded The bellows of the packing seal actuator base is connected on, the bellows-sheathed is located on the valve rod；

Governor motion, the governor motion are included installed in the gear-box of the valve stem top and installed in the gear Handwheel on case.

Optimally, the seal assembly also includes the thrust pad being arranged between the valve rod and the flap and is enclosed on The valve rod bottom and the valve clack cover being engaged with the flap.

Optimally, the packing seal mechanism include being sealingly mounted at the bonnet, of the branch pipe upper end, be arranged on it is described Packing seat in bonnet, on the Packing seat and enclose and be located at the filler group of the valve rod surrounding, be pressed in the filler The filler pressing sleeve at group top, the hold-down grid that is pressed at the top of the filler pressing sleeve and through the hold-down grid and with it is described on The stud that bonnet is connected.

Because above-mentioned technical proposal is used, the utility model has following advantages compared with prior art：The utility model Bellows stop valve, coordinated by using the valve system, seal assembly and governor motion of specific structure, so when rotation hand Wheeling driving gear case can drive flap to move linearly when working, while bellows can ensure that inclusion seal at valve rod, from And improve the reliability of valve sealing face and the service life of valve.

Brief description of the drawings

Accompanying drawing 1 is the structural representation of the utility model bellows stop valve.

Embodiment

Shown embodiment is further described to the utility model below in conjunction with the accompanying drawings.

Bellows stop valve as shown in Figure 1, mainly include valve system 1, seal assembly 2 and governor motion 3 etc..

Wherein, valve system 1 includes valve body 11, is opened in valve body 11 and runs through its runner 12, formation in valve body 11 On wall and two guiding ribs 13 extending towards（Two guiding ribs 13 respectively above the inwall of valve body 11 and under inwall direction its The direction of axial line tilts extension）, the valve seat 15 that is fixed on guiding rib 13 and formed the top of valve body 11 and with runner 12 The accommodating chamber 14 being connected.Seal assembly 2 includes being arranged in valve body 11 and the flap 21 of sealing pair can be formed with valve seat 15, under End is inserted in the valve rod 24 that in flap 21 and upper end is extended to outside valve system 1 through accommodating chamber 14, lid is located at the top of accommodating chamber 15 Bottom flange 25, sealed set in the top of bottom flange 25 and be set in outside valve rod 24 branch pipe 26, installed in the top of branch pipe 26 and The packing seal mechanism 27 being set in outside valve rod 24 and lower end are welded on valve rod 24 and upper end is welded on packing seal mechanism The bellows 28 of 27 bottoms, bellows 28 are set on valve rod 24；Governor motion 3 includes the gear-box for being arranged on the top of valve rod 24 31 and the handwheel 32 on gear-box 31.

In the present embodiment, seal assembly 2 also includes the thrust pad 22 and set being arranged between valve rod 24 and flap 21 In the bottom of valve rod 24 and the valve clack cover 23 that is engaged with flap 21.Packing seal mechanism 27 includes being sealingly mounted on branch pipe 26 The bonnet, 271 at end, the Packing seat 274 being arranged in bonnet, 271, on Packing seat 274 and enclose and be located at valve rod 24 4 The filler group 275 in week, the filler pressing sleeve 276 for being pressed in the top of filler group 275, the hold-down grid 272 for being pressed in the top of filler pressing sleeve 276 And the stud 27 being connected through hold-down grid 272 and with bonnet, 271.

For above-described embodiment only to illustrate technical concepts and features of the present utility model, its object is to allow be familiar with technique Personage can understand content of the present utility model and implement according to this, the scope of protection of the utility model can not be limited with this. All equivalent change or modifications made according to the utility model Spirit Essence, should all cover the scope of protection of the utility model it It is interior.

Claims (3)

1. a kind of bellows stop valve, it is characterised in that it includes：

Valve system（1）, the valve system（1）Including valve body（11）, be opened in the valve body（11）It is interior and run through its runner （12）, formed in the valve body（11）On inwall and two guiding ribs extending towards（13）, be fixed on the guiding rib（13） On valve seat（15）And formed in the valve body（11）Top and with the runner（12）The accommodating chamber being connected（14）；

Seal assembly（2）, the seal assembly（2）Including being arranged at the valve body（11）It is interior and can be with the valve seat（15）Formed The flap of sealing pair（21）, lower end be inserted in the flap（21）Interior and upper end is through the accommodating chamber（14）Extend to the valve machine Structure（1）Outer valve rod（24）, be covered on the accommodating chamber（15）The bottom flange at top（25）, sealed set is in the bottom flange （25）Top and it is set in the valve rod（24）Outer branch pipe（26）, installed in the branch pipe（26）Top and be set in described Valve rod（24）Outer packing seal mechanism（27）And lower end is welded on the valve rod（24）Upper and upper end is welded on the filler Sealing mechanism（27）The bellows of bottom（28）, the bellows（28）It is set in the valve rod（24）On；

Governor motion（3）, the governor motion（3）Including installed in the valve rod（24）The gear-box at top（31）And installation In the gear-box（31）On handwheel（32）.

2. bellows stop valve according to claim 1, it is characterised in that：The seal assembly（2）Also include being arranged on The valve rod（24）With the flap（21）Between thrust pad（22）And it is enclosed on the valve rod（24）Bottom and with it is described Flap（21）The valve clack cover being engaged（23）.

3. bellows stop valve according to claim 1, it is characterised in that：The packing seal mechanism（27）Including sealing Installed in the branch pipe（26）The bonnet, of upper end（271）, be arranged on the bonnet,（271）Interior Packing seat（274）, installation In the Packing seat（274）Go up and enclose and be located at the valve rod（24）The filler group of surrounding（275）, be pressed in the filler group（275） The filler pressing sleeve at top（276）, be pressed in the filler pressing sleeve（276）The hold-down grid at top（272）And through the filler Pressing plate（272）And with the bonnet,（271）The stud being connected（27）.