CN217271984U - Double-sealing structure for valve core and valve seat - Google Patents
Double-sealing structure for valve core and valve seat Download PDFInfo
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- CN217271984U CN217271984U CN202123121147.0U CN202123121147U CN217271984U CN 217271984 U CN217271984 U CN 217271984U CN 202123121147 U CN202123121147 U CN 202123121147U CN 217271984 U CN217271984 U CN 217271984U
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- valve seat
- valve
- sealing
- valve core
- guide sleeve
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Abstract
The utility model relates to a valve core and valve seat double-sealing structure, which comprises a valve body, wherein a guide sleeve and a valve seat which are mutually sealed are sequentially arranged in the valve body from top to bottom, a valve core is arranged in the guide sleeve and the valve seat in a sliding way, two sealing structures are arranged between the valve seat and the valve core, and a deceleration cavity is arranged between the two sealing structures; the lower part of the valve body is provided with a medium inflow channel and a medium outflow channel, the medium inflow channel is communicated with the valve seat, and the medium outflow channel is communicated with the guide sleeve. The valve seat and the valve core of the utility model are both provided with 2 sealing surfaces, which increases the sealing effect and the service life of the valve; a speed reduction cavity 3 is arranged between the 2 sealing surfaces, so that the instantaneous flow rate of fluid is reduced, and the flushing of the fluid to the valve core is reduced.
Description
Technical Field
The utility model belongs to the technical field of the valve, a case disk seat double-seal structure is related to.
Background
At present, the sealing form of the conventional regulating valve depends on the sealing surface of the valve core and the valve seat to be matched and sealed, the sealing requirement can be met under the normal condition, the sealing reliability is obviously reduced in the occasions where medium and high pressure is easy to generate cavitation and flash evaporation, the service life of a product is generally prolonged by replacing a material with higher hardness, the problem cannot be solved from the root, internal parts still need to be replaced periodically, or other products with high price are selected, and certain influence is caused on the production cost.
Disclosure of Invention
An object of the utility model is to provide a case disk seat double-seal structure can solve foretell problem.
According to the utility model provides a technical scheme: a valve core and valve seat double-sealing structure comprises a valve body, wherein a guide sleeve and a valve seat which are mutually sealed are sequentially arranged in the valve body from top to bottom, a valve core is arranged in the guide sleeve and the valve seat in a sliding manner, two sealing structures are arranged between the valve seat and the valve core, and a speed reduction cavity is arranged between the two sealing structures; the lower part of the valve body is provided with a medium inflow channel and a medium outflow channel, the medium inflow channel is communicated with the valve seat, and the medium outflow channel is communicated with the guide sleeve.
As a further improvement of the utility model, a guide sleeve cavity and a valve seat cavity are sequentially arranged in the valve body from top to bottom; the lower part of the valve seat cavity is communicated with a medium inflow channel.
As a further improvement of the utility model, a first valve core sliding cavity is arranged in the valve seat, a first sealing hole and a second sealing hole are arranged in the first valve core sliding cavity from bottom to top, and a speed reduction inner wall is arranged between the first sealing hole and the second sealing hole; the first spool slide chamber communicates with the medium inflow passage.
As a further improvement of the utility model, the second sealing hole pore wall is located the outside of the first sealing hole extension line.
As a further improvement of the utility model, the first sealing hole and the second sealing hole are in a structure with a big top and a small bottom.
As the utility model discloses a further improvement, guide sleeve opens has the smooth chamber of second valve core, and the smooth chamber lower part side of second valve core communicates guide sleeve medium outflow passageway, and guide sleeve medium outflow passageway communicates medium outflow passageway.
As a further improvement, the valve seat upper portion is provided with a valve seat positioning boss, and the bottom of the guide sleeve is provided with a gland lower positioning boss.
As a further improvement of the utility model, the side surface of the upper part of the sliding cavity of the second valve core is communicated with a pressure balance hole, the pressure balance hole and a communication medium outflow channel.
As a further improvement, the valve core is provided with a first sealing shaft section and a second sealing shaft section in sequence from bottom to top.
As a further improvement, the valve core and the deceleration inner wall are enclosed into a deceleration cavity.
The positive progress effect of this application lies in:
the valve seat and the valve core of the utility model are both provided with 2 sealing surfaces, which increases the sealing effect and the service life of the valve; a speed reduction cavity is arranged between the 2 sealing surfaces, so that the instantaneous flow rate of fluid is reduced, and the flushing of the fluid to the valve core is reduced.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an enlarged schematic view of region a in fig. 1.
Fig. 3 is a schematic structural view of the throttling guide sleeve of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances for purposes of describing the embodiments of the invention herein. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In fig. 1-3, the valve comprises a valve body 1, a medium inflow channel 1-1, a medium outflow channel 1-2, a valve cover 4, a valve seat 5, a throttling guide sleeve 6, a valve core 7, a guide sleeve 8 and the like.
As shown in fig. 1, the utility model relates to a valve core and valve seat double-sealing structure, which comprises a valve body 1, wherein a guide sleeve 8 and a valve seat 5 which are mutually sealed are sequentially arranged in the valve body 1 from top to bottom, a valve core 7 is arranged in the guide sleeve 8 and the valve seat 5 in a sliding manner, two sealing structures are arranged between the valve seat 5 and the valve core 7, and a deceleration cavity 3 is arranged between the two sealing structures; the lower part of the valve body 1 is provided with a medium inflow channel 1-1 and a medium outflow channel 1-2, the medium inflow channel 1-1 is communicated with a valve seat 5, and the medium outflow channel 1-2 is communicated with a guide sleeve 8.
A guide sleeve cavity and a valve seat cavity are sequentially formed in the valve body 1 from top to bottom and are respectively used for mounting a guide sleeve 8 and a valve seat 5; the lower part of the valve seat cavity is communicated with a medium inflow channel 1-1.
As shown in FIG. 2, a first spool sliding cavity 5-1 is formed in the valve seat 5, a first sealing hole 5-2 and a second sealing hole 5-3 are formed in the first spool sliding cavity 5-1 from bottom to top, and a speed reduction inner wall 5-4 is arranged between the first sealing hole 5-2 and the second sealing hole 5-3. The upper part of the valve seat 5 is provided with a valve seat positioning boss. The first spool sliding chamber 5-1 communicates with the medium inflow passage 1-1.
The first sealing hole 5-2 and the second sealing hole 5-3 are of a structure with a large upper part and a small lower part.
As shown in FIG. 3, the guide sleeve 8 is provided with a second spool slide chamber 8-1, the lower side surface of the second spool slide chamber 8-1 is communicated with a guide sleeve medium outflow channel 8-2, and the guide sleeve medium outflow channel 8-2 is communicated with a medium outflow channel 1-2. The bottom of the guide sleeve 8 is provided with a lower gland positioning boss.
The upper side surface of the second valve core sliding cavity 8-1 is communicated with a pressure balancing hole 8-3, and the pressure balancing hole 8-3 is communicated with a medium outflow channel 1-2. And under the valve core closing state, the pressure behind the valve makes the upper pressure and the lower pressure of the valve core 7 quickly balanced through the pressure balancing hole 8-3.
The valve seat positioning boss is matched with the gland lower positioning boss and used for positioning the valve seat 5 and the guide sleeve 8.
As shown in figure 2, the valve core 7 is sequentially provided with a first sealing shaft section 7-1 and a second sealing shaft section 7-2 from bottom to top, and the peripheries of the first sealing shaft section 7-1 and the second sealing shaft section 7-2 are respectively matched with a first sealing hole 5-2 and a second sealing hole 5-3.
The valve core 7 and the speed reduction inner wall 5-4 form a speed reduction cavity 3.
The upper part of the valve body 1 is provided with a valve cover 4, and the lower part of the valve cover 4 is propped against the guide sleeve 8. The valve cover 4 and the guide sleeve 8 are provided with matched positioning bosses on opposite surfaces. A third valve core sliding cavity is formed in the valve cover 4.
The working process of the utility model is as follows:
as shown in fig. 2, when the valve core 2 is opened, the flow area S1 of the first sealing shaft section 7-1 of the valve core 7 and the first sealing hole 5-2 of the valve seat 5 is smaller than the flow area S3 of the speed reduction chamber 3, and the flow area S3 of the speed reduction chamber 3 is smaller than the flow area S2 of the second sealing shaft section 7-2 of the valve core 7 and the second sealing hole 5-3 of the valve seat 5; the fluid flow rate through 2 sealing surfaces will decrease 2 times; therefore, the pressure reduction is equivalent to the 2-stage pressure reduction of the fluid, and the cavitation and flash evaporation conditions are avoided from occurring on the first sealing surfaces of the valve core and the valve seat.
The hole wall of the second sealing hole 5-3 is positioned at the outer side of the extension line of the first sealing hole 5-2, when fluid flows through the first sealing surface of the valve core and the valve seat, the fluid can flow out along the tangential direction of the first sealing shaft section 7-1 of the valve core and does not interfere with the hole wall of the second sealing hole 5-3 of the valve seat 5, and the phenomenon that the second sealing hole 5-3 of the valve seat 5 is damaged due to impact caused by high-speed flushing of the fluid under the high-pressure condition is avoided.
It is to be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principles of the present invention, and the present invention is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (10)
1. A double-sealing structure of a valve core and a valve seat is characterized by comprising a valve body (1), wherein a guide sleeve (8) and a valve seat (5) which are mutually sealed are sequentially arranged in the valve body (1) from top to bottom, a valve core (7) is arranged in the guide sleeve (8) and the valve seat (5) in a sliding manner, two sealing structures are arranged between the valve seat (5) and the valve core (7), and a deceleration cavity (3) is arranged between the two sealing structures; the lower part of the valve body (1) is provided with a medium inflow channel (1-1) and a medium outflow channel (1-2), the medium inflow channel (1-1) is communicated with the valve seat (5), and the medium outflow channel (1-2) is communicated with the guide sleeve (8).
2. The dual sealing structure of valve core and valve seat as claimed in claim 1, wherein the valve body (1) is provided with a guide sleeve chamber and a valve seat chamber sequentially from top to bottom; the lower part of the valve seat cavity is communicated with a medium inflow channel (1-1).
3. The dual sealing structure of valve core and valve seat as claimed in claim 1, wherein the valve seat (5) is opened with a first valve core sliding chamber (5-1), the first valve core sliding chamber (5-1) is provided with a first sealing hole (5-2) and a second sealing hole (5-3) from bottom to top, and a speed reducing inner wall (5-4) is provided between the first sealing hole (5-2) and the second sealing hole (5-3); the first spool sliding chamber (5-1) is communicated with the medium inflow passage (1-1).
4. The dual sealing structure of the cartridge and the valve seat according to claim 3, wherein the wall of the second sealing hole (5-3) is located outside the extension line of the first sealing hole (5-2).
5. The dual sealing structure of the cartridge and the valve seat according to claim 3, wherein the first sealing hole (5-2) and the second sealing hole (5-3) are of a structure having a large top and a small bottom.
6. The dual sealing structure of the spool and the valve seat according to claim 3, wherein the guide sleeve (8) is opened with a second spool sliding chamber (8-1), the lower side of the second spool sliding chamber (8-1) communicates with the guide sleeve medium outflow passage (8-2), and the guide sleeve medium outflow passage (8-2) communicates with the medium outflow passage (1-2).
7. The dual sealing structure of the valve core and the valve seat as claimed in claim 6, wherein the valve seat (5) is provided at an upper portion thereof with a valve seat positioning boss, and the guide sleeve (8) is provided at a bottom thereof with a gland lower positioning boss.
8. The dual sealing structure of the spool and the valve seat according to claim 6, wherein the upper side of the second spool sliding chamber (8-1) communicates with the pressure balancing hole (8-3), and the pressure balancing hole (8-3) communicates with the medium outflow passage (1-2).
9. The dual sealing structure of valve core and valve seat as claimed in claim 6, wherein the valve core (7) is provided with a first sealing shaft section (7-1) and a second sealing shaft section (7-2) in sequence from bottom to top.
10. The dual sealing structure of the valve core and the valve seat as claimed in claim 7, wherein the valve core (7) and the deceleration inner wall (5-4) enclose a deceleration chamber (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123121147.0U CN217271984U (en) | 2021-12-13 | 2021-12-13 | Double-sealing structure for valve core and valve seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123121147.0U CN217271984U (en) | 2021-12-13 | 2021-12-13 | Double-sealing structure for valve core and valve seat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217271984U true CN217271984U (en) | 2022-08-23 |
Family
ID=82882008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123121147.0U Active CN217271984U (en) | 2021-12-13 | 2021-12-13 | Double-sealing structure for valve core and valve seat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217271984U (en) |
-
2021
- 2021-12-13 CN CN202123121147.0U patent/CN217271984U/en active Active
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