CN211315164U - Sealing pair structure of stop valve - Google Patents
Sealing pair structure of stop valve Download PDFInfo
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- CN211315164U CN211315164U CN201922156742.4U CN201922156742U CN211315164U CN 211315164 U CN211315164 U CN 211315164U CN 201922156742 U CN201922156742 U CN 201922156742U CN 211315164 U CN211315164 U CN 211315164U
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- disk seat
- ring
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Abstract
The utility model provides a sealed substructure of stop valve, including the disk seat, the disk seat adopts the conical surface type, is provided with the valve clack on the disk seat, is provided with ring type seal between valve clack and the disk seat, and the ring type seal inner wall is the face of cylinder, and the outer wall is step cylinder form structure, and ring type seal inner wall and the contact of the valve clack outside, and the conical surface of disk seat contacts with ring type seal's outer wall step circumference, the ring type seal below is provided with the retaining ring. The utility model discloses utilize the ring packing outer wall to be stepped cylinder form structure, the conical surface contact through outer wall step and disk seat constitutes the line contact sealed vice, has reduced sealed specific pressure, has further reduced the effort of closing of valve, and the frozen easy of right angle limit sealing position of outer wall step is clear away simultaneously, changes in closing of valve, is adapted to and uses under the ultra-low temperature environment, has improved the reliability of the sealed vice work of stop valve under the ultra-low temperature environment.
Description
Technical Field
The utility model relates to a mechanical valve technical field especially relates to a sealing pair structure of stop valve.
Background
In the existing stop valve sealing pair structure, two structural forms of a plane sealing pair and a conical surface sealing pair are generally adopted. The plane sealing structure is a sealing surface of the valve seat valve clack, and the plane sealing structure adopts plane contact type sealing. The conical surface sealing structure is a sealing surface of the valve seat and the valve clack, and adopts a conical surface contact type sealing with equal cone angle. When the two structural forms work in an ultralow temperature environment, due to the inevitable existence of trace easy-to-freeze components in a medium, the surface of the sealing surface of the valve clack is frozen under a special condition, so that a sealing pair cannot be in complete contact in the closing process of the valve, the internal leakage condition of the valve occurs, and the process flow is influenced. Therefore, in order to improve the reliability of the sealing pair of the stop valve in the ultralow-temperature environment, a new sealing pair structure is particularly important to seek.
An effective solution to the problems in the related art has not been proposed yet.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a sealing pair structure of stop valve to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a sealing pair structure of a stop valve comprises a valve seat, wherein the valve seat is in a conical surface type, a valve clack is arranged on the valve seat, an annular sealing ring is arranged between the valve clack and the valve seat, the inner wall of the annular sealing ring is a cylindrical surface, the outer wall of the annular sealing ring is in a stepped cylindrical structure, the inner wall of the annular sealing ring is in contact with the outer side of the valve clack, the conical surface of the valve seat is in contact with the step circumference of the outer wall of the annular sealing ring.
Further, the number of the steps of the stepped cylindrical structure of the annular sealing ring is between 1 and 4.
Furthermore, a valve rod is arranged in the middle of the valve clack, a circle of first semicircular arc channel is arranged at the lower end of the outer side of the valve rod, a circle of second semicircular arc channel is arranged on the inner wall of the valve clack, and the first semicircular arc channel corresponds to the second semicircular arc channel and forms a circular channel.
Further, a steel ball is arranged inside the circular channel.
Furthermore, a through hole is arranged on the side wall of the valve clack, the diameter of the through hole is the same as that of the circular channel, and the through hole is communicated with the circular channel.
Further, a screw is arranged in the through hole and penetrates through the through hole to be communicated with the steel ball.
Furthermore, the annular sealing ring is a nonmetal soft sealing ring
Compared with the prior art, the utility model discloses following beneficial effect has: (1) the utility model discloses utilize the ring type seal outer wall to be stepped cylinder form structure, the conical surface contact through outer wall step and disk seat constitutes line contact sealed vice, has reduced sealed specific pressure, has further reduced the effort of closing of valve. (2) the icing at the right-angle edge sealing position of the outer wall step of the utility model is easy to clear, is easier to close the valve, is suitable for being used in the ultra-low temperature environment, and improves the reliability of the stop valve sealing pair in the ultra-low temperature environment; (3) the utility model has simple structure and convenient installation or disassembly; (4) utilize the annular seal to be nonmetal soft seal circle, have the elasticity function, under great closing effort, the accessible is adjusted outer wall step quantity and is realized sealing.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a sealing pair structure of a stop valve according to the invention;
fig. 2 is a schematic structural diagram of a cross section of an annular sealing ring of a sealing pair structure of the stop valve according to the utility model.
Reference numerals:
1. a valve seat; 2. an annular seal ring; 3. a retainer ring; 4. a steel ball; 5. a valve flap; 6. and (4) screws.
Detailed Description
The following, with reference to the drawings and the detailed description, further description of the present invention is made:
referring to fig. 1 to 2, a sealing pair structure of a stop valve comprises a valve seat 1, wherein the valve seat 1 is in a conical surface type, a valve seat 5 is arranged on the valve seat 1, an annular sealing ring 2 is arranged between a valve clack 5 and the valve seat 1, the inner wall of the annular sealing ring 2 is a cylindrical surface, the outer wall of the annular sealing ring is in a stepped cylindrical structure, the inner wall of the annular sealing ring 2 is tightly attached to the outer side of the valve clack 5, the conical surface of the valve seat 1 is in contact with the step circumferential line of the outer wall of the annular sealing ring 2. The retainer ring 3 is used for fixing the annular sealing ring 2, so that the annular sealing ring 2 does not generate axial displacement.
The conical surface of the valve seat 1 is contacted with the outer wall step circumference of the annular sealing ring 2 to form a line contact sealing structure, so that a better sealing effect is achieved, the line contact sealing pair reduces the sealing specific pressure, and the closing acting force of the valve is further reduced.
According to the above, the number of steps of the stepped cylindrical structure of the ring seal 2 is between 1 and 4. The number of steps can be determined according to the nominal size and the pressure level of the valve, and the number of the steps is between 1 and 4.
According to the above, the valve rod is arranged in the middle of the valve clack 5, the lower end of the outer side of the valve rod is provided with a circle of first semicircular arc channel, the inner wall of the valve clack 5 is provided with a circle of second semicircular arc channel, and the first semicircular arc channel corresponds to the second semicircular arc channel and forms a circular channel.
According to the above, the steel ball 4 is arranged inside the circular channel. The circular channel is a mounting channel of the steel ball 4.
According to the above, the side wall of the valve flap 5 is provided with a through hole, the diameter of the through hole is the same as that of the circular channel, and the through hole is communicated with the circular channel.
According to the above, the through hole is internally provided with the screw 6, and the screw 6 penetrates through the through hole to be communicated with the steel ball 4. The screw is inserted into the middle of the steel ball for locking, otherwise, the steel ball 4 can fall off, and the valve clack 5 is connected with the valve rod by the steel ball 4.
According to the above, the ring-shaped seal ring 2 is a non-metal soft seal ring.
Nonmetal soft sealing washer, the elasticity function has, under great closing effort, the accessible is adjusted outer wall step quantity and is realized sealed effect, there is the circumference that is greater than 1 when the valve is closed and is played sealed effect with the contact of disk seat conical surface, and freezing easy the being clear away of step right-angle side sealing position, the sealed face surface of valve clack has been avoided forming under certain special circumstances and has frozen, lead to the unable complete contact of valve closing in-process seal pair, the condition influence process flow is leaked in the valve appears, and set to nonmetal soft sealing washer, change in closing of valve, the reliability of stop valve seal pair work under the ultra-low temperature environment has been improved.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The sealing pair structure of the stop valve is characterized by comprising a valve seat (1), wherein the valve seat (1) adopts a conical surface type, a valve clack (5) is arranged on the valve seat (1), an annular sealing ring (2) is arranged between the valve clack (5) and the valve seat (1), the inner wall of the annular sealing ring (2) is a cylindrical surface, the outer wall of the annular sealing ring is of a stepped cylindrical structure, the inner wall of the annular sealing ring (2) is in contact with the outer side of the valve clack (5), the conical surface of the valve seat (1) is in contact with the outer wall step circumferential line of the annular sealing ring (2), and a retainer ring (3) is arranged below the annular sealing ring (.
2. A sealing pair structure of a shut-off valve according to claim 1, characterized in that the number of steps of the stepped cylindrical structure of the annular sealing ring (2) is between 1 and 4.
3. The sealing pair structure of the stop valve according to claim 1, wherein a valve rod is arranged in the middle of the valve flap (5), a circle of first semicircular arc channel is arranged at the lower end of the outer side of the valve rod, a circle of second semicircular arc channel is arranged on the inner wall of the valve flap (5), and the first semicircular arc channel and the second semicircular arc channel correspond to each other and form a circular channel.
4. A sealing pair structure of a stop valve according to claim 3, characterized in that a steel ball (4) is arranged in the circular channel.
5. A sealing pair structure of a stop valve according to claim 3, characterized in that a through hole is provided on the side wall of the valve flap (5), the diameter of the through hole is the same as that of the circular passage and the through hole is communicated with the circular passage.
6. The sealing pair structure of the stop valve is characterized in that a screw (6) is arranged in the through hole, and the screw (6) penetrates through the through hole to be communicated with the steel ball (4).
7. A sealing pair structure of a stop valve according to claim 1, characterized in that the annular sealing ring (2) is a non-metallic soft sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922156742.4U CN211315164U (en) | 2019-12-05 | 2019-12-05 | Sealing pair structure of stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922156742.4U CN211315164U (en) | 2019-12-05 | 2019-12-05 | Sealing pair structure of stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211315164U true CN211315164U (en) | 2020-08-21 |
Family
ID=72056205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922156742.4U Active CN211315164U (en) | 2019-12-05 | 2019-12-05 | Sealing pair structure of stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211315164U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112253760A (en) * | 2020-10-30 | 2021-01-22 | 上海沪东造船阀门有限公司 | Manual switch ultra-low temperature stop valve |
| CN117419182A (en) * | 2023-12-18 | 2024-01-19 | 四川新途流体控制技术有限公司 | High-pressure pneumatic valve and fluid control system |
-
2019
- 2019-12-05 CN CN201922156742.4U patent/CN211315164U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112253760A (en) * | 2020-10-30 | 2021-01-22 | 上海沪东造船阀门有限公司 | Manual switch ultra-low temperature stop valve |
| CN117419182A (en) * | 2023-12-18 | 2024-01-19 | 四川新途流体控制技术有限公司 | High-pressure pneumatic valve and fluid control system |
| CN117419182B (en) * | 2023-12-18 | 2024-03-01 | 四川新途流体控制技术有限公司 | High-pressure pneumatic valve and fluid control system |
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