CN210218770U - Double-piston hard sealing ball valve - Google Patents
Double-piston hard sealing ball valve Download PDFInfo
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- CN210218770U CN210218770U CN201921199540.1U CN201921199540U CN210218770U CN 210218770 U CN210218770 U CN 210218770U CN 201921199540 U CN201921199540 U CN 201921199540U CN 210218770 U CN210218770 U CN 210218770U
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- seat
- disc spring
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Abstract
The utility model relates to a double-piston hard seal ball valve belongs to sealed ball valve technical field. The valve seat outer ring is provided with a flow guide groove, the valve seat is provided with a plurality of drainage holes, the outer side ends of the drainage holes are communicated with the flow guide groove, and the inner side ends of the drainage holes are communicated with the inner cavity of the valve seat. The utility model has the advantages of simple and compact structure, reasonable, job stabilization is reliable, and the earial drainage structure can make the medium get into the disk seat back fast to can form the pressure differential at the disk seat back fast, make to form good sealed specific pressure between disk seat and the valve ball, improve valve seal reliability.
Description
Technical Field
The utility model relates to a double-piston hard seal ball valve belongs to sealed ball valve technical field.
Background
The double-piston hard seal ball valve is widely used in the processes of natural gas, coal mine and oil exploitation, extraction and processing and pipeline transportation. The valve seat has the greatest advantage that after a single valve seat is damaged, the other valve seat also plays a sealing role, and the valve seat has great use advantages in actual process production. Especially in the deep-buried pipeline, maintenance and change all can bring very big loss for the user, consequently have very high to the life and the performance requirement of ball valve, and double piston ball valve hard seal ball valve is because of having "dual fail-safe sealed", and is particularly suitable for this type of service behavior.
In the prior art, the hard sealing ball valve of the double-piston ball valve comprises a valve seat, a valve body and a valve ball, a gap exists between the valve seat and the valve body, and the gap can pass through a medium, so that the pressure of the medium forms a pressure difference at the back of the valve seat, and the valve seat and the valve ball can be tightly attached. In practical use, the media may be mixed with impurities, and the impurities may cause the blockage of the gap, once the gap is blocked, the pressure of the media cannot enter the back of the valve seat to form a pressure difference, so that the valve seat and the valve ball cannot form a good specific sealing pressure, and finally, the valve sealing is unreliable.
Disclosure of Invention
An object of the utility model is to overcome above-mentioned weak point to provide the hard sealed ball valve of double piston, can form the pressure differential at the disk seat back fast, make to form good sealed specific pressure between disk seat and the valve ball, improve valve seal reliability.
According to the technical scheme provided by the utility model, double-piston hard seal ball valve includes valve body, valve rod, valve ball, valve body cap and disk seat, be equipped with the valve ball that can the free rotation in the valve body inner chamber, valve body cap is connected through the connecting piece to valve body one side, is equipped with the disk seat between valve ball and valve body, the valve body cap, the valve rod lower extreme stretches into in the valve body inner chamber and connects the valve ball upper end, and the bottom shaft is connected to the valve ball lower extreme, and characterized by is connected in the valve body bottom to the bottom shaft lower extreme: the outer ring of the valve seat is provided with a first positioning step surface and a second positioning step surface, an upper disc spring is arranged between the first positioning step surface and the valve body cap, the inner side end of the upper disc spring is in pressing contact with the valve ball, the outer side end of the upper disc spring is in pressing contact with the valve body and the valve body cap, and the upper disc spring realizes the pressing between the valve ball and the valve body cap; a lower disc spring and a sealing element are arranged between the second positioning step surface and the valve body cap, and the lower disc spring and the sealing element realize the compression and sealing between the valve ball and the valve body cap; the valve seat outer ring is provided with a diversion trench, a plurality of discharge holes are formed in the valve seat, the outer side ends of the discharge holes are communicated with the diversion trench, and the inner side ends of the discharge holes are communicated with the inner cavity of the valve seat.
Further, a packing assembly is arranged between the valve rod and the valve body, and the packing assembly realizes sealing between the valve rod and the valve body.
Further, the plurality of drain holes are evenly distributed along the circumferential direction of the valve seat.
Compared with the prior art, the utility model has the advantages that:
the utility model has the advantages of simple and compact structure, reasonable, job stabilization is reliable, and the earial drainage structure can make the medium get into the disk seat back fast to can form the pressure differential at the disk seat back fast, make to form good sealed specific pressure between disk seat and the valve ball, improve valve seal reliability.
Drawings
Fig. 1 is a front view of the present invention.
Fig. 2 is an enlarged view of a portion a in fig. 1.
Description of reference numerals: 1-valve body, 2-valve rod, 3-packing component, 4-valve ball, 5-valve body cap, 6-bottom shaft, 7-valve seat, 8-upper disc spring, 9-lower disc spring, 10-sealing element, 11-flow guide groove and 12-drainage hole.
Detailed Description
The invention will be further described with reference to the embodiments shown in the drawings to which:
as shown in figures 1-2, the utility model discloses mainly include valve body 1, valve rod 2, valve ball 4, valve body cap 5 and disk seat 7.
The valve comprises a valve body 1 and is characterized in that a valve ball 4 capable of freely rotating is arranged in an inner cavity of the valve body 1, one side of the valve body 1 is connected with a valve body cap 5 through a connecting piece, and a valve seat 7 is arranged between the valve ball 4 and the valve body 1 as well as between the valve body cap 5.
The valve seat 7 outer lane is equipped with first location step face and second location step face, is equipped with between first location step face and valve body 1, the valve body cap 5 and goes up disc spring 8, goes up disc spring 8 medial extremity and compresses tightly contact valve ball 4, goes up disc spring 8 outside end and compresses tightly contact valve body 1 and valve body cap 5, goes up disc spring 8 and realizes compressing tightly between valve ball 4 and valve body 1, the valve body cap 5.
And a lower disc spring 9 and a sealing element 10 are arranged between the second positioning step surface and the valve body 1 and the valve body cap 5, and the lower disc spring 9 and the sealing element 10 realize the compression and the sealing between the valve ball 4 and the valve body 1 and the valve body cap 5.
The outer ring of the valve seat 7 is provided with a diversion trench 11, the valve seat 7 is provided with a plurality of discharge holes 12, the outer side ends of the discharge holes 12 are communicated with the diversion trench 11, and the inner side ends of the discharge holes 12 are communicated with the inner cavity of the valve seat 7. The plurality of drain holes 12 are evenly distributed along the circumferential direction of the valve seat 7.
The lower end of the valve rod 2 extends into the inner cavity of the valve body 1 and is connected with the upper end of a valve ball 4, the lower end of the valve ball 4 is connected with a bottom shaft 6, and the lower end of the bottom shaft 6 is connected to the bottom of the valve body 1.
And a packing component 3 is arranged between the valve rod 2 and the valve body 1, and the packing component 3 realizes the sealing between the valve rod 2 and the valve body 1.
The utility model has the advantages of simple and compact structure, reasonable, job stabilization is reliable, and the earial drainage structure can make the medium get into the disk seat back fast to can form the pressure differential at the disk seat back fast, make to form good sealed specific pressure between disk seat and the valve ball, improve valve seal reliability.
Claims (3)
1. Double-piston hard seal ball valve, including valve body (1), valve rod (2), valve ball (4), valve body cap (5) and disk seat (7), be equipped with in valve body (1) inner chamber can free rotation valve ball (4), valve body (1) one side is passed through the connecting piece and is connected valve body cap (5), is equipped with disk seat (7) between valve ball (4) and valve body (1), valve body cap (5), valve rod (2) lower extreme stretches into in valve body (1) inner chamber and connects valve ball (4) upper end, and bottom shaft (6) are connected to valve ball (4) lower extreme, and bottom shaft (6) lower extreme is connected in valve body (1) bottom, characterized by: a first positioning step surface and a second positioning step surface are arranged on the outer ring of the valve seat (7), an upper disc spring (8) is arranged between the first positioning step surface and the valve body (1) and the valve body cap (5), the inner side end of the upper disc spring (8) is in pressing contact with the valve ball (4), the outer side end of the upper disc spring (8) is in pressing contact with the valve body (1) and the valve body cap (5), and the upper disc spring (8) realizes the pressing between the valve ball (4) and the valve body (1) and the valve body cap (5); a lower disc spring (9) and a sealing element (10) are arranged between the second positioning step surface and the valve body (1) and the valve body cap (5), and the lower disc spring (9) and the sealing element (10) realize the compression and sealing between the valve ball (4) and the valve body (1) and the valve body cap (5); the outer ring of the valve seat (7) is provided with a flow guide groove (11), the valve seat (7) is provided with a plurality of discharge holes (12), the outer side ends of the discharge holes (12) are communicated with the flow guide groove (11), and the inner side ends of the discharge holes (12) are communicated with the inner cavity of the valve seat (7).
2. A dual piston hard seal ball valve as defined in claim 1 wherein: and a packing component (3) is arranged between the valve rod (2) and the valve body (1), and the packing component (3) realizes sealing between the valve rod (2) and the valve body (1).
3. A dual piston hard seal ball valve as defined in claim 1 wherein: the plurality of drain holes (12) are evenly distributed along the circumferential direction of the valve seat (7).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201921199540.1U CN210218770U (en) | 2019-07-26 | 2019-07-26 | Double-piston hard sealing ball valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201921199540.1U CN210218770U (en) | 2019-07-26 | 2019-07-26 | Double-piston hard sealing ball valve |
Publications (1)
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CN210218770U true CN210218770U (en) | 2020-03-31 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CN201921199540.1U Active CN210218770U (en) | 2019-07-26 | 2019-07-26 | Double-piston hard sealing ball valve |
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CN (1) | CN210218770U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112253791A (en) * | 2020-10-29 | 2021-01-22 | 上海沪东造船阀门有限公司 | Double-sealing ball valve with compensation valve seat |
-
2019
- 2019-07-26 CN CN201921199540.1U patent/CN210218770U/en active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112253791A (en) * | 2020-10-29 | 2021-01-22 | 上海沪东造船阀门有限公司 | Double-sealing ball valve with compensation valve seat |
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