CN113653837A

CN113653837A - Assembled forged steel axial flow check valve

Info

Publication number: CN113653837A
Application number: CN202111040013.8A
Authority: CN
Inventors: 刘余
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-09-06
Filing date: 2021-09-06
Publication date: 2021-11-16

Abstract

The invention discloses an assembled forged steel axial flow check valve, which comprises a valve body, a valve seat assembly and a valve shaft, wherein the valve seat assembly is sleeved in the valve body, a sealing plate and a slow-closing cylinder assembly are sleeved in the valve seat assembly in a relative manner, one end of the valve shaft is fixed on the sealing plate, the other end of the valve shaft is connected with a spring, one end of the spring, which is far away from the valve shaft, is pressed against the inner bottom of the slow-closing cylinder assembly, hydraulic oil is injected into the slow-closing cylinder assembly, a flow regulating plate is fixed on the valve shaft outside the hydraulic oil, and the valve seat assembly is fixed in the valve body through four open rings; the effect is as follows: the hydraulic slow-closing valve has the advantages that the forging structure is adopted, the internal structure is simple, the flowing state is good, the fluid resistance is small, the hydraulic slow-closing cylinder is installed at the valve core position, the area of an effective flow channel hole in the flow adjusting plate is adjusted, so that the purpose of adjusting the slow-closing speed is achieved, the hydraulic slow-closing cylinder is additionally arranged, the valve is opened and closed, the operation is stable and reliable, the response speed to the medium pressure change is high, the noise is low, the sealing performance is good, the flow resistance is small, the flow is large, the overall dimension is small, and the like.

Description

Assembled forged steel axial flow check valve

Technical Field

The invention relates to a valve, in particular to an assembled forged steel axial flow check valve.

Background

At present, the axial flow check valve manufactured in China has the defects of complex internal structure, more parts, larger size, large occupied flow passage area, small effective flow passage area in the valve, large fluid resistance, small flow CV, complex flow passage structure, easy attachment of internal structural parts to impurities in fluid, large inertia at the moment of starting or resetting of a spring, easy damage to a sealing structure by strong impact force, and the like, which bring about pipeline vibration and local water hammer effect.

And because it adopts the whole casting to shape, when its heavy-calibre, single-piece small batch production, the mould expense is too high, is disposable mould most of the time, the waste of social resource is serious, because its inner valve assembly also casts integrally, the whole valve needs to scrap when the valve sealing surface damages, waste to the metal material is big.

At present, the domestic axial flow check valves are all low pressure.

Disclosure of Invention

The invention aims to solve the technical problem of the prior art and provides an assembled forged steel axial flow check valve.

In order to achieve the above object, the invention takes the following measures:

an assembled forged steel axial flow check valve comprises a valve body, a valve seat assembly and a valve shaft, wherein the valve seat assembly is sleeved in the valve body, a sealing plate and a slow-closing cylinder assembly are sleeved in the valve seat assembly in a relative mode, one end of the valve shaft is fixed on the sealing plate, the other end of the valve shaft is connected with a spring, one end, far away from the valve shaft, of the spring is pressed against the inner bottom of the slow-closing cylinder assembly, hydraulic oil is injected into the slow-closing cylinder assembly, a flow regulating plate is fixed on the valve shaft outside the hydraulic oil, and the valve seat assembly is fixed in the valve body through four open rings;

the outer wall of the valve seat assembly is sleeved with an O-shaped ring, and the outer side of the O-shaped ring is pressed against the inner wall of the valve body;

the outer part of the valve body is provided with a ground pin;

the valve body is manufactured by integral forging;

and a pressing ring is fixed on the outer side of the valve seat assembly through a socket head cap screw and locks the valve seat assembly in the valve body.

The invention has the beneficial effects that: the utility model has the advantages of the practicality, novel structure, the whole forging structural design that adopts, overall dimension is little, inner structure is simple, the flow state is good, fluid resistance is little, case position installation hydraulic pressure slowly closes the jar, through adjusting the area in effective flow path hole on the flow adjusting plate, thereby reach the purpose of adjusting slowly closing speed, because increase hydraulic pressure slowly closes the jar, make the valve open and close the steady operation reliably, it is fast to medium pressure change response speed, it is big to have low noise and good flow resistance miniflow of leakproofness, a great deal of advantages such as overall dimension is little.

Drawings

Fig. 1 is a schematic cross-sectional plane structure of the present invention.

Detailed Description

The utility model provides an assembled forged steel axial flow check valve, includes valve body 1, disk seat assembly 6 and valve shaft 8, disk seat assembly 6 cover establish in valve body 1, the relative cover is equipped with closing plate 7 and slowly closes jar subassembly 9 in the disk seat assembly 6, the one end of valve shaft 8 is fixed on closing plate 7, the other end is connected with spring 12, spring 12 keeps away from the interior bottom of one end roof pressure of valve shaft 8 at slowly closing jar subassembly 9, it has hydraulic oil 11 to pour into in the slowly closing jar subassembly 9, be fixed with flow regulating plate 10 on the valve shaft 8 in the hydraulic oil 11 outside, disk seat assembly 6 is fixed in valve body 1 through four ring-opening 3.

According to the assembled forged steel axial flow check valve, the valve body 1 is made by integral forging, the mechanical property of the material is good, and the valve can bear larger pressure (the axial flow check valve in China is low pressure at present).

All internal structural components of the valve body 1 are assembled into a group through assembling after all the internal structural components are forged and formed, a valve seat assembly, a sealing assembly and a hydraulic cylinder slow-closing assembly are assembled in an assembling mode, the internal structural components are sequentially assembled into the valve body 1 and fixed into the valve body 1 through four-opening rings 3 of parts, and meanwhile, a pressing ring 2 is fixedly locked into the valve body 1 and fixed onto a valve seat assembly 6 through an inner hexagon screw 4. The structural strength is improved, the sizes of parts are reduced, and the area of a flow passage in the valve is ensured to the maximum extent.

After the valve is subjected to the action of external force or is inevitably damaged in the operation process, the valve seat assembly 6, the sealing assembly (the sealing plate 7) and the hydraulic cylinder slow-closing assembly (the slow-closing cylinder assembly 9) can be completely taken out only by sequentially disassembling the inner hexagon screws 4, the pressing ring 2 and the four-open ring 3 of the parts, and the valve seat assembly 6 and the sealing assembly are locally maintained and assembled respectively, so that the brand-new sealing effect can be realized.

When one part is seriously damaged and cannot be repaired, only the corresponding materials or parts such as the valve seat assembly 6, the sealing plate 7 and the like need to be replaced, the material accounts for less than 5 percent of the cost in the whole valve production, the service life of the valve is prolonged to 30 years (the service life of the whole valve is 3-4 years), and the social and economic benefits are remarkable.

Because the internal structure of the valve is optimized (the hydraulic slow-closing cylinder, namely the slow-closing cylinder component 9 is added), the valve has the advantages of stable operation, small flow resistance, small water hammer pressure, good flow state, high response speed to medium pressure change, low noise, good sealing property, small flow resistance, small overall dimension and the like.

The outer wall of the valve seat assembly 6 is sleeved with an O-shaped ring 5, and the outer side of the O-shaped ring 5 is pressed on the inner wall of the valve body 1. The outer part of the valve body 1 is provided with a ground pin 13. The valve body 1 is manufactured by integral forging and forming.

The outer side of the valve seat assembly 6 is fixed with a pressing ring 2 through a hexagon socket head cap screw 4, and the pressing ring 2 locks the valve seat assembly 6 in the valve body 1.

1. Valve body 1: the valve body 1 is forged and integrally processed and formed (when the pressure is less than or equal to PN40, the valve body can be made of seamless steel pipes).

2. And (3) pressing ring 2: the whole valve core assembly is compressed through the pressing ring 2, and the pressing ring 2 adopts circular arc transition, so that the fluid operation is more stable.

3. And (3) four-open ring 3: through the design of the four-open ring 3, the whole valve core assembly is firmly fixed in the valve body 1, and looseness, falling and displacement caused by pipeline vibration and other reasons can be avoided.

4. Valve seat assembly 6: through optimizing the valve seat subassembly, reduce spare part and occupy the area that flows to, reach and increase effective runner in the valve, increase valve CV value.

5. Slowly closing the cylinder assembly 9: a sealed hydraulic slow-closing cylinder is added after a valve sealing element, and the hydraulic oil 11 with the capacity of the slow-closing cylinder 1/2-3/4 (selected according to the slow-closing requirement) is adopted, so that the valve is slowly and stably opened or closed under the resistance of the hydraulic oil in the opening or closing process.

6. Flow adjusting plate 10: the flow regulating plate 10 is provided with a plurality of small holes, and the speed of the hydraulic oil flowing through the flow regulating plate is controlled by controlling the number and the size of the holes, so that the speed of opening or closing the valve core is controlled.

Claims

1. The utility model provides an assembled forged steel axial flow check valve, includes valve body (1), disk seat subassembly (6) and valve shaft (8), its characterized in that: disk seat subassembly (6) cover establish in valve body (1), relative cover is equipped with closing plate (7) and slow closing cylinder subassembly (9) in disk seat subassembly (6), the one end of valve shaft (8) is fixed on closing plate (7), the other end is connected with spring (12), the one end roof pressure that valve shaft (8) were kept away from in spring (12) is at the interior bottom of slow closing cylinder subassembly (9), it has hydraulic oil (11) to inject in slow closing cylinder subassembly (9), be fixed with flow regulation board (10) on valve shaft (8) in the hydraulic oil (11) outside, disk seat subassembly (6) are fixed in valve body (1) through four ring opening (3).

2. The assembled forged steel axial flow check valve of claim 1, wherein: the outer wall of the valve seat assembly (6) is sleeved with an O-shaped ring (5), and the outer side of the O-shaped ring (5) is pressed against the inner wall of the valve body (1).

3. An assembled forged steel axial flow check valve according to claim 1 or 2, wherein: the outer part of the valve body (1) is provided with a ground pin (13).

4. The assembled forged steel axial flow check valve of claim 3, wherein: the valve body (1) is manufactured by integral forging and forming.

5. The assembled forged steel axial flow check valve of claim 4, wherein: the outer side of the valve seat assembly (6) is fixed with a pressing ring (2) through a hexagon socket head cap screw (4), and the valve seat assembly (6) is locked in the valve body (1) through the pressing ring (2).