CN218992415U - Self-sealing ball valve - Google Patents
Self-sealing ball valve Download PDFInfo
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- CN218992415U CN218992415U CN202223185742.5U CN202223185742U CN218992415U CN 218992415 U CN218992415 U CN 218992415U CN 202223185742 U CN202223185742 U CN 202223185742U CN 218992415 U CN218992415 U CN 218992415U
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Abstract
The self-sealing ball valve comprises a valve body (1), a valve core (2) is positioned in the valve body, a valve rod (5) is inserted into a valve rod sleeve (3) at the upper part of the valve body, the self-sealing ball valve is characterized in that the valve core is a hemispherical shell, a valve seat (9) is a pipe body, threads on the outer circle of the valve seat are screwed on the inner wall at the right part of the valve body, and when the valve rod of the valve core is rotated, the outer spherical surface of the valve core can cover the opening part at the left end of the valve seat; a square tenon (8) at the lower end of the valve rod is inserted into a rectangular hole at the upper part of the valve core, a screw (11) is screwed on the end face of the valve core, the end part of the screw is a round rod, the round rod is inserted into the square tenon, and the square tenon and the rectangular hole can move along the axial direction of the screw. The valve has the advantages that 1, when the valve is closed, the valve core is pushed to the valve seat by the pressure of fluid, and the valve seat is reliably attached to the valve core; 2. after the valve seat is worn, the movement of the valve core can automatically compensate the wear amount; 3. the valve seat has no precompression on the valve core, so that abrasion can be reduced; 4. the axial positioning of the valve seat is accurate and convenient, and the assembly efficiency can be improved.
Description
Technical Field
The utility model relates to a ball valve.
Background
The ball valve generally comprises a valve body, a valve core and a valve seat, wherein the spherical valve core is positioned in the valve body, the valve seats are respectively arranged at two sides of the valve core, the valve seat is connected to the valve body, the ball valve is opened when a through hole of the valve core is coaxial with the valve body, and the ball valve is closed when the through hole of the valve core is vertical to the axis of the valve body. The valve core can rub with the valve seat when rotating, and the sealing performance can be reduced after the valve seat is worn; when the valve seat is repaired, the pipeline and the valve are required to be shut down and disassembled, so that the valve seat is very inconvenient.
In addition, in order to ensure that the valve core and the valve seat are reliably sealed, the valve seat needs to have enough pre-pressure on the valve core, and the excessive pre-pressure can accelerate abrasion.
Disclosure of Invention
Aiming at the problems, the utility model provides a self-sealing ball valve, when a valve seat is worn, a valve core can be automatically clung to the valve seat to compensate the wear of the valve seat.
The technical scheme of the utility model is that the self-sealing ball valve comprises a valve body, a valve core is positioned in the valve body, a valve rod sleeve at the upper part of the valve body is internally and hermetically inserted with a valve rod for driving the valve core to rotate, the self-sealing ball valve is characterized in that the valve core is a hemispherical shell, a valve seat is a pipe body, threads on the outer circle of the valve seat are screwed on the inner wall at the right part of the valve body, and when the valve rod of the valve core is rotated, the outer spherical surface of the valve core can cover the opening part at the left end of the valve seat; the square tenon at the lower end of the valve rod is inserted into the rectangular hole at the upper part of the valve core, the end face of the valve core is screwed with a screw, the end part of the screw is a round rod, the round rod is inserted into the square tenon, and the square tenon and the rectangular hole can move along the axial direction of the screw.
The valve has the beneficial effects that 1, the square tenon and the rectangular hole can move along the axial direction of the screw, when the valve is closed, the pressure of fluid (shown by an arrow in fig. 1) can push the valve core to the valve seat, and meanwhile, the valve core is a semicircular shell, so that the valve seat and the valve core are reliably attached; 2. after the valve seat is worn, the movement of the valve core can automatically compensate the wear amount, so that the sealing performance is maintained; 3. the valve seat does not need to apply pressure to the valve core, so that abrasion can be reduced; 4. the valve seat is screwed on the valve body, and the valve seat is rotated during assembly, so that the valve seat is in contact with the valve core, the valve seat is accurate and convenient to axially position the valve core, and the assembly efficiency is improved.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is an enlarged sectional view of A-A of fig. 1.
The reference signs are as follows: 1-valve body, 2-valve core, 3-valve rod sleeve, 4-thread sleeve, 5-valve rod, 6-sealing filler, 7-flange, 8-square tenon, 9-valve seat, 10-gap, 11-screw and 12-anti-return gasket.
Detailed Description
The wire bonding drawings illustrate specific embodiments of the utility model.
A self-sealing ball valve comprises a valve body 1, a valve core 2 is positioned in the valve body, a valve rod 5 for driving the valve core 2 to rotate is inserted in a valve rod sleeve 3 at the upper part of the valve body in a sealing way, the valve core is a hemispherical shell, a valve seat 9 is a pipe body, threads on the outer circle of the valve seat are screwed on protrusions on the inner wall of the right part of the valve body, and the large outer circle of the right part of the valve seat is matched with the inner wall of the valve body; when the valve rod of the valve core is rotated, the outer spherical surface of the valve core can be contacted with the opening part of the left end of the valve seat, and the opening part of the left end of the valve seat is a spherical cambered surface; the square tenon 8 at the lower end of the valve rod 5 is inserted into a rectangular hole at the upper part of the valve core, a screw 11 is screwed into the end face (the cross section of the sphere) of the valve core, a retaining washer 12 is arranged between the cap part of the screw and the end face of the valve core, the end part of the screw is a round rod, the round rod is inserted into the square tenon, the square tenon and the rectangular hole can move along the axial direction of the screw, namely a gap 10 is formed between the square tenon and the rectangular hole, and the length of the gap 10 is 0.2 millimeter.
When the valve is closed, the pressure of the fluid (the flowing direction of the fluid is shown by an arrow in fig. 1) can push the valve core to the valve seat, the valve seat is reliably attached to the valve core, and after the valve seat is worn, the movement of the valve core can automatically compensate the wear amount.
The small hole at the lower part of the valve rod sleeve 3 is matched with the valve rod 5, the inner diameter of the large hole at the middle part of the valve rod sleeve 3 is larger than the outer diameter of the valve rod 5, the valve rod 5 is provided with a flange 7, the flange is positioned in the large hole, a sealing filler 6 is arranged between the valve rod and the large hole, the sealing filler is placed on the plane of the flange, the upper part of the valve rod sleeve 3 is screwed with a thread sleeve 4 for pressing the sealing filler, and the valve rod extends out of the thread sleeve. The valve has the effects of preventing fluid in the valve from leaking along the valve rod, and simultaneously, axially positioning the valve rod and preventing the valve rod from axially moving in the valve rod sleeve.
Claims (2)
1. The self-sealing ball valve comprises a valve body (1), a valve core (2) is positioned in the valve body, a valve rod (5) for driving the valve core to rotate is inserted in a valve rod sleeve (3) at the upper part of the valve body in a sealing way, and the self-sealing ball valve is characterized in that the valve core is a hemispherical shell, a valve seat (9) is a pipe body, threads on the outer circle of the valve seat are screwed on the inner wall at the right part of the valve body, and when the valve rod of the valve core is rotated, the outer spherical surface of the valve core can cover the opening part at the left end of the valve seat; a square tenon (8) at the lower end of the valve rod is inserted into a rectangular hole at the upper part of the valve core, a screw (11) is screwed on the end face of the valve core, the end part of the screw is a round rod, the round rod is inserted into the square tenon, and the square tenon and the rectangular hole can move along the axial direction of the screw.
2. The self-sealing ball valve according to claim 1, characterized in that the small hole at the lower part of the valve rod sleeve (3) is matched with the valve rod (5), the inner diameter of the large hole at the middle part of the valve rod sleeve (3) is larger than the outer diameter of the valve rod, the valve rod is provided with a flange (7), the flange is positioned in the large hole, a sealing filler (6) is arranged between the valve rod and the large hole, the sealing filler is placed on the plane of the flange, and the upper part of the valve rod sleeve is screwed with a screw sleeve (4) for compressing the sealing filler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223185742.5U CN218992415U (en) | 2022-11-30 | 2022-11-30 | Self-sealing ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223185742.5U CN218992415U (en) | 2022-11-30 | 2022-11-30 | Self-sealing ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218992415U true CN218992415U (en) | 2023-05-09 |
Family
ID=86188279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223185742.5U Active CN218992415U (en) | 2022-11-30 | 2022-11-30 | Self-sealing ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218992415U (en) |
-
2022
- 2022-11-30 CN CN202223185742.5U patent/CN218992415U/en active Active
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