CN218761498U

CN218761498U - Control valve structure of sealed face scour protection of general type

Info

Publication number: CN218761498U
Application number: CN202223400756.4U
Authority: CN
Inventors: 高峰; 高冲
Original assignee: Shanghai Huazhi Power Station Equipment Co ltd
Current assignee: Shanghai Huazhi Power Station Equipment Co ltd
Priority date: 2022-12-19
Filing date: 2022-12-19
Publication date: 2023-03-28
Anticipated expiration: 2032-12-19

Abstract

The utility model provides a general type sealing surface scour prevention control valve structure, including case, disk seat, upper seal portion and lower seal portion, the terminal surface of case is equipped with bellied protection casing, and the terminal surface of disk seat is equipped with dodges the groove with the protection casing complex, and the laminating in the outside of protection casing is equipped with upper seal portion, and the laminating in the outside of dodging the groove is equipped with lower seal portion; the upper sealing part is provided with an upper sealing inclined plane inclining inwards, the lower sealing part is provided with a lower sealing inclined plane inclining outwards, and the upper sealing part and the lower sealing part are sealed through the upper sealing inclined plane and the lower sealing inclined plane which are matched and attached. In this application, the sealed face that sets up between case and the disk seat need be through behind an anti-scouring structure, and the medium can't directly erode sealed face, and the control valve still can be sealed tight after opening and close many times, guarantees the regulation characteristic, improves the life of valve greatly, reduction in production cost.

Description

Control valve structure of sealed face scour protection of general type

Technical Field

The utility model relates to a fluid pipeline's control valve field especially relates to a control valve structure of sealed face scour protection of general type.

Background

Control valve structures currently employed in fluid conduits typically include a valve seat having a valve spool, as shown in fig. 1 and 2. When the control valve with the structure in the prior art is used, fluid can directly wash the valve seat and the valve core, and particularly, the valve can be closed untightly under the working conditions of high pressure difference and frequent adjustment of the valve. The reason is that the sealing surface between the valve seat and the valve core of the regulating valve is directly washed by fluid to cause damage, and finally, the valve internals are required to be replaced to normally work.

The control valve needs to accurately control the flow under any working condition, but most of the control valves are relatively harsh in use working conditions, for example, the pressure difference of a medium passing through the control valve is large before and after the medium passes through the control valve, the temperature of the medium is high, the difference of the flow rate of the medium before and after the medium passes through the control valve is large, and the sealing performance of the control valve is required to be maintained in a long-term leakage-free state.

However, in actual production, the service lives of most control valves are short, and the research and discovery on domestic and imported control valves result in that the sealing performance of the control valves is damaged, and the problems are visually represented by blowing loss of valve core and valve seat sealing surfaces of the valves. After intensive research, the inventor finds that in the opening process of the valve, high-temperature, high-pressure and high-flow-rate media directly scour a sealing surface and are blown to be damaged when the valve is not closed, and the sealing performance of the valve is damaged.

The existing control valve structure for preventing a sealing surface of a valve core and a valve seat of a valve from being washed is mainly of a flow-off type (patent number ZL 201320125076.8).

The problems of the above problems are: firstly, once the sealing surfaces of a valve core and a valve seat of the valve are seriously damaged, the sealing performance and the adjusting performance of the control valve are influenced; secondly, the sealing surface of the valve core and the valve seat in the valve with the structure is not protected, so that the service life of the valve core and the valve seat is shortened, and the production cost is increased. Thirdly, no corresponding protection measures are provided for the sealing surface of the valve core and the valve seat of the open-type valve.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a control valve structure of sealed face scour protection of general type, can guarantee sealing performance, the regulation performance and the life of control valve under the condition of various pressure levels and various medium flow direction, prevent that the control valve from receiving the direct washing away of medium, the sealed face of effectual protection control valve protection case to the protection case does not receive the damage, improves the life of valve.

In order to achieve the purpose, the utility model provides a general type sealing surface scour prevention control valve structure, which comprises a valve core, a valve seat, an upper sealing part and a lower sealing part, wherein the end surface of the valve core is provided with a raised protective cover, the end surface of the valve seat is provided with an avoiding groove matched with the protective cover, the outer side of the protective cover is provided with the upper sealing part in a laminating manner, and the outer side of the avoiding groove is provided with the lower sealing part in a laminating manner;

last sealing portion is last to be equipped with the last sealed scarf of leanin, be equipped with the lower sealed scarf that leans out down in the sealing portion, go up sealing portion and lower sealing portion through the cooperation laminating go up sealed scarf and seal up down.

Further, in the general control valve structure for preventing the sealing surface from being scoured, the valve core and the valve seat form a flow-opening type or flow-closing type structure.

Furthermore, in the general type control valve structure for preventing the sealing surface from being scoured, the height of the lower sealing part is smaller than the depth of the avoiding groove, and the height of the upper sealing part is smaller than the height of the protective cover.

Further, in the general type control valve structure for preventing the sealing surface from being scoured, the width of the avoidance groove is larger than that of the protection cover.

Further, in the general type control valve structure with the anti-scouring sealing surface, a bottom end part of the upper sealing part, which is back to the upper sealing inclined-cutting surface, is a corner blocking part, and the corner blocking part is a round angle.

Further, in the universal type control valve structure for preventing the sealing surface from being scoured, the horizontal height of the angle blocking part is lower than that of the bottom end of the upper sealing chamfer, and when the upper sealing part and the lower sealing part are in sealing fit, the horizontal height of the angle blocking part is lower than that of the bottom end of the lower sealing chamfer.

Further, in the general type control valve structure for preventing the sealing surface from being scoured, the upper sealing part is fixed on the valve core in a build-up welding manner, and the lower sealing part is fixed on the valve seat in a build-up welding manner.

Further, in the structure of the universal control valve with the anti-scouring sealing surface, the upper sealing part and the lower sealing part are made of STL alloy.

Compared with the prior art, the beneficial effects of the utility model are mainly embodied in that: after a sealing surface arranged between the valve core and the valve seat needs to pass through an anti-scouring structure, a medium cannot directly scour the sealing surface, the control valve can still be tightly sealed after being opened and closed for many times, the adjusting characteristic is guaranteed, the service life of the valve is greatly prolonged, and the production cost is reduced.

Drawings

Fig. 1 is a schematic structural view of a structure of a control valve of a flow shut type in the related art;

FIG. 2 is a schematic diagram of a prior art flow-off control valve configuration;

fig. 3 is a structural schematic view of a flow-closed type control valve structure for preventing the erosion of the sealing surface of the universal type in the invention;

fig. 4 is a structural schematic diagram of the flow-open type of the control valve structure for preventing the sealing surface from being scoured in the general type of the present invention.

Detailed Description

The structure of the universal seal face anti-erosion control valve of the present invention will be described in greater detail with reference to the drawings, in which preferred embodiments of the present invention are shown, it being understood that those skilled in the art can modify the invention described herein while still achieving the advantageous effects of the present invention. Accordingly, the following description should be construed as broadly as possible to those skilled in the art and not as limiting the invention.

In the description of the present invention, it should be noted that, for the orientation words, if there are terms such as "center", "horizontal", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and positional relationship indicated are based on the orientation or positional relationship shown in the drawings, and only for the convenience of describing the present invention and simplifying the description, it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific scope of the present invention.

In the present invention, unless otherwise explicitly defined or limited, the terms "assembled", "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; the two elements can be directly connected or connected through an intermediate medium, and the two elements can be communicated with each other. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

The invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.

As shown in fig. 3 to 4, the utility model provides a general type control valve structure for preventing the sealing surface from being scoured, which comprises a valve core 1, a valve seat 2, an upper sealing part 3 and a lower sealing part 4, wherein the end surface of the valve core 1 is provided with a raised protective cover 5, the end surface of the valve seat 2 is provided with an avoiding groove 6 matched with the protective cover 5, the outer side of the protective cover 5 is provided with the upper sealing part 3 in a laminating manner, and the outer side of the avoiding groove 6 is provided with the lower sealing part 4 in a laminating manner; the upper sealing part 3 is provided with an upper sealing inclined plane inclining inwards, the lower sealing inclined plane inclining outwards is arranged on the lower sealing part 4, and the upper sealing part 3 and the lower sealing part 4 are sealed through the upper sealing inclined plane and the lower sealing inclined plane which are matched and attached.

Further, in the present embodiment, the height of the lower seal 4 is smaller than the depth of the escape groove 6, and the height of the upper seal 3 is smaller than the height of the shield 5. The width of the avoiding groove 6 is larger than the width of the shield 5. The bottom end part of the upper sealing part 3 back to the upper sealing chamfer is a baffle corner part 7, and the baffle corner part 7 is a round angle. The level of the angle blocking part 7 is lower than that of the bottom end of the upper sealing chamfer, and when the upper sealing part 3 and the lower sealing part 4 are in sealing fit, the level of the angle blocking part 7 is lower than that of the bottom end of the lower sealing chamfer.

Meanwhile, the upper sealing part 3 is fixed on the valve core 1 in a surfacing mode, the lower sealing part 4 is fixed on the valve seat 2 in a surfacing mode, and the upper sealing part 3 and the lower sealing part 4 are both made of STL alloy. The integrally-surfacing-welded STL alloy can improve the hardness, the wear resistance and the corrosion resistance of a valve sealing surface, reduce the cost and prolong the service life of the valve.

Because the control valve structure divide into by case 1 and the structure of the class of opening of disk seat 2 constitution and class of closing, this application adopts the mode that increases the scour prevention structure that is used for the buffering in the place ahead of sealed face promptly, effectively protects sealed face for the medium can not directly erode sealed face, ensures that the control valve opens and close many times the back still can seal tightly, guarantees the regulation characteristic, improves the life of valve greatly, reduction in production cost.

Therefore, as shown in fig. 3, when the flow-off control valve adopts the anti-scouring structure in the present application, the medium will have 12-24 stages of pressure reduction and speed reduction after passing through the valve cage, the medium after pressure reduction and speed reduction reaches the valve core 1, because the upper sealing portion 3 on the valve core 1 is arranged at the outermost end, the lower sealing portion 4 of the valve seat 2 is attached and arranged at the inner side of the upper sealing portion 3, and the horizontal height of the baffle corner portion 7 at the bottom end of the upper sealing chamfered surface is lower than that of the upper sealing chamfered surface and that of the lower sealing surface, that is, the baffle corner portion 7 completely shields the sealing surface of the upper sealing portion 3 and that of the lower sealing portion 4 which are attached in a sealing manner. At the moment that the valve is opened, owing to the buffering of the fender angle portion 7 as outer scour prevention cover, the medium can not directly wash to the last sealed scarf that plays sealed effect and the sealed scarf down to play the effect of sealed face between protection case and the disk seat, make the medium can not directly wash out sealed face, reach the purpose that the scour prevention protected in this application.

Therefore, as shown in fig. 4, when the anti-scouring structure in the application is adopted in the open-flow control valve, the medium can be reduced in pressure and decelerated at 4-6 levels after passing through the cage, the medium after reduced in pressure and decelerated enters the valve body after passing through the cage under the valve seat, because the protection cover 5 on the valve core 1 is arranged at the inner side of the upper sealing part 3, and the height of the upper sealing part 3 is smaller than that of the protection cover 5, namely, the protection cover 5 completely shields the upper sealing inclined plane on the upper sealing part 3, and the lower sealing inclined plane is outwards inclined. In the twinkling of an eye that the valve was opened, the medium flows through at first and is higher than the 5 departments of protection casing on the sealed face of case, owing to the buffering of protection casing 5 through as interior scour prevention cover, the medium can not directly wash to the last sealed scarf that plays sealed effect and lower sealed scarf to play the effect of sealed face between protection case and the disk seat, make the medium can not directly wash out sealed face, reach the scour prevention in this application and carry out the purpose of protecting.

In summary, in the embodiment, in the proposed control valve structure for preventing the erosion of the sealing surface of the universal type, after the sealing surface arranged between the valve core and the valve seat needs to pass through an anti-erosion structure, the medium cannot directly erode the sealing surface, and the control valve can be tightly sealed after being opened and closed for many times, so that the adjustment characteristic is ensured, the service life of the valve is greatly prolonged, and the production cost is reduced.

The above description is only for the preferred embodiment of the present invention, and does not limit the present invention. Any technical personnel who belongs to the technical field, in the scope that does not deviate from the technical scheme of the utility model, to the technical scheme and the technical content that the utility model discloses expose do the change such as the equivalent replacement of any form or modification, all belong to the content that does not break away from the technical scheme of the utility model, still belong to within the scope of protection of the utility model.

Claims

1. A universal type control valve structure with a sealing surface being scour-proof is characterized by comprising a valve core, a valve seat, an upper sealing portion and a lower sealing portion, wherein a raised protective cover is arranged on the end face of the valve core;

2. The universal seal face anti-scouring control valve structure as recited in claim 1, wherein the valve core and the valve seat constitute a flow-on or flow-off structure.

3. The universal seal face anti-erosion control valve structure of claim 2, wherein the lower seal portion has a height less than the depth of the avoidance groove, and the upper seal portion has a height less than the height of the protective cover.

4. A universal seal face anti-erosion control valve structure as claimed in claim 2, wherein the width of the avoidance slot is greater than the width of the protective cover.

5. The universal seal face anti-scouring control valve structure as claimed in claim 2, wherein a bottom end portion of the upper seal portion facing away from the upper seal chamfer is a corner stop portion, and the corner stop portion is rounded.

6. The universal seal face anti-scour control valve arrangement according to claim 5, wherein the angled stop portion has a lower level than a bottom end of the upper seal chamfer and a lower level than a bottom end of the lower seal chamfer when the upper and lower seal portions are in sealing engagement.

7. The universal type control valve structure for preventing the sealing surface from being scoured according to claim 1, wherein the upper sealing portion is fixed on the valve core in a surfacing mode, and the lower sealing portion is fixed on the valve seat in a surfacing mode.

8. The universal seal face anti-scour control valve structure according to claim 7, wherein the upper seal portion and the lower seal portion are each STL alloy.