CN212986110U - Double-sealing seat ball valve with replaceable valve seat - Google Patents
Double-sealing seat ball valve with replaceable valve seat Download PDFInfo
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- CN212986110U CN212986110U CN202021715073.6U CN202021715073U CN212986110U CN 212986110 U CN212986110 U CN 212986110U CN 202021715073 U CN202021715073 U CN 202021715073U CN 212986110 U CN212986110 U CN 212986110U
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Abstract
The utility model relates to a double containment seat ball valve of removable disk seat, including valve body, disk seat, valve rod, spheroid and handle, characterized by: the valve seat is formed by concentrically installing an inner valve seat and an outer valve seat in a valve body passage, the outer valve seat is formed by a base and a sealing ring, the base is fixedly installed with the internal thread of the valve body passage through the thread of the outer circular surface, one side of a valve cavity of the base is provided with an annular groove concentric with the valve body passage, and the sealing ring is embedded in the annular groove; the inner valve seat is made of an annular cylinder made of rubber materials, and the outer cylindrical surface of the inner valve seat is tightly matched and installed with the inner cylindrical wall of the base. The inner valve seat, the outer valve seat and the ball body are matched with each other to form a double-sealing pair, the sealing performance is good, and the valve seat is convenient to replace.
Description
Technical Field
The utility model belongs to the valve field especially relates to a ball valve. The utility model is suitable for a control valve of trades medium pipeline such as machinery, metallurgy, petroleum, chemical industry, electric power.
Background
The ball valve is widely applied to medium conveying pipelines in various fields of national economy due to simple structure, convenient opening and closing and small flow resistance, and the ball valve structurally comprises a valve body, a valve seat, a valve rod, a ball body and a handle, wherein the valve seat is installed at an inlet and outlet passage opening of the valve body, the surface of the ball body is matched with a sealing surface of the valve seat to form a sealing pair, the 90-degree rotating handle is improved, the ball body is fully opened or fully closed and matched with the valve seat, the opening and closing operation is realized, and the. However, in the rotation process of the ball body, the surface of the ball body and the sealing surface of the valve seat are abraded, so that the sealing surface of the valve seat is damaged, the sealing matching performance is reduced, the sealing reliability of the product is poor, and the service life is short.
Disclosure of Invention
The utility model discloses shortcoming to prior art exists provides a double containment seat ball valve of removable disk seat that sealing performance is good, long service life.
The technical scheme of the utility model including valve body, disk seat, valve rod, spheroid and handle, characterized by: the valve seat is formed by concentrically installing an inner valve seat and an outer valve seat in a valve body passage, the outer valve seat is formed by a base and a sealing ring, the base is fixedly installed with the internal thread of the valve body passage through the thread of the outer circular surface, one side of a valve cavity of the base is provided with an annular groove concentric with the valve body passage, and the sealing ring is embedded in the annular groove; the inner valve seat is made of an annular cylinder made of rubber materials, the outer cylindrical surface of the inner valve seat is tightly matched with the inner circular wall of the base, a sealing surface matched with the ball body is arranged at one end of the inner valve seat in the valve cavity, a radial convex shoulder closely matched with the end face of the valve body is arranged at the other end of the inner valve seat, and the outer circle diameter of the radial convex shoulder is larger than that of the base.
Preferably, the sealing ring is made of wear-resistant alloy material, and a disc spring is arranged between the sealing ring and the groove bottom of the annular groove.
Preferably, the outer circle surface of the base consists of an external thread and a cylindrical surface, the cylindrical surface is positioned on one side of the valve cavity, the diameter of the outer circle of the cylindrical surface is smaller than that of the external thread, and an O-shaped sealing ring is embedded in the outer cylindrical surface and is connected with the wall of the inner cavity of the valve body in a sealing mode.
Compared with the prior art, the utility model beneficial effect be: the valve seat is composed of an inner valve seat and an outer valve seat which are installed in the valve body channel through threads, the inner valve seat, the outer valve seat and the ball body are matched with each other to form a double-sealing pair, the sealing performance is good, and the valve seat is convenient to replace.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1. the valve comprises a valve body, 2, a bolt, 3, a nut, 4, a positioning shaft, 5, an O-shaped sealing ring, 6, a ball body, 7, an inner valve seat, 8, a sealing ring, 9, a disc spring, 10, a base, 11, a sealing gasket, 12, a valve rod, 13, a packing, 14, a gland, 15, a handle and 16 locking nuts.
Detailed Description
The double-sealing seat ball valve with the replaceable valve seat as shown in fig. 1 comprises a valve body 1, a valve seat, a valve rod 12, a ball body 6 and a handle 15, wherein the lower end of the valve rod 12 is connected with a square hole at the upper end of the ball body 6 in a sleeved mode through a square cylinder, a radial annular convex shoulder is arranged at the upper end of the square cylinder, the outer circular surface of the radial annular convex shoulder is embedded in a mounting hole of the valve body 1, a sealing gasket 11 is arranged between the upper circular surface of the radial annular convex shoulder and the inner step of the mounting hole of the valve body 1 to prevent the valve rod 12 from being knocked out by medium pressure, a packing 13 is arranged between the outer circular surface of the middle; the method is characterized in that: the valve seat is composed of an inner valve seat 7 and an outer valve seat which are concentrically arranged in a channel of the valve body 1, the outer valve seat is composed of a base 10 and a sealing ring 8, the base 10 is fixedly arranged with an inner thread of the channel of the valve body 1 through a thread on the outer circular surface, an annular groove concentric with the channel of the valve body 1 is formed on one side of the valve cavity of the base 10, the sealing ring 8 is embedded in the annular groove, the sealing ring 8 is made of high-strength fireproof resin materials, when the sealing ring 8 is abraded to influence the sealing performance, the base 10 can be detached from the channel of the valve body 1 to; the inner valve seat 7 is an annular cylinder made of rubber materials, the outer cylindrical surface of the inner valve seat is tightly matched with the inner circular wall of the base 10, a sealing surface matched with the ball body 6 is formed at one end of the inner valve seat located in the valve cavity, a radial convex shoulder closely matched with the end surface of the valve body 1 is arranged at the other end of the inner valve seat, the outer circular diameter of the radial convex shoulder is larger than that of the base, the threaded connection position between the outer circular surface of the base 10 and the inner wall of a channel of the valve body 1 is sealed, and the sealing ring 8, the inner valve seat 7 and the ball body 6 are.
The sealing ring 8 is made of wear-resistant alloy materials and has wear-resistant and fireproof functions, and the disc spring 9 is arranged between the sealing ring 8 and the groove bottom of the annular groove, so that the sealing specific pressure between the sealing ring 8 and the ball body 6 is improved.
The outer circle surface of the base 10 consists of external threads and a cylindrical surface, the cylindrical surface is positioned on one side of the valve cavity, the diameter of the outer circle of the cylindrical surface is smaller than the outer diameter of the external threads, and the O-shaped sealing ring 5 is embedded in the outer cylindrical surface and is in sealing connection with the inner cavity wall of the valve body 1, so that the sealing performance between the outer circle surface of the base 10 and the inner cavity wall of the valve body.
A positioning shaft 4 is arranged between the lower end of the ball body 6 and the valve body 1, and the positioning shaft 4 is fixedly installed at the lower end of the valve body 1 in a sealing mode through a bolt 2 and a nut 3.
Claims (3)
1. A double-sealing seat ball valve with a replaceable valve seat comprises a valve body (1), a valve seat, a valve rod (12), a ball body (6) and a handle (15); the method is characterized in that: the valve seat is formed by concentrically installing an inner valve seat (7) and an outer valve seat in a channel of the valve body (1), the outer valve seat is formed by fixedly installing a base (10) and a sealing ring (8) with the inner thread of the channel of the valve body (1) through the thread of the outer circular surface, an annular groove concentric with the channel of the valve body (1) is formed in one side, located on the valve cavity, of the base (10), and the sealing ring (8) is embedded in the annular groove; the inner valve seat (7) is an annular cylinder made of rubber materials, the outer cylindrical surface of the inner valve seat is tightly matched with the inner cylindrical wall of the base (10), one end of the inner valve seat, which is positioned in the valve cavity, is provided with a sealing surface matched with the ball body (6), the other end of the inner valve seat is provided with a radial convex shoulder closely matched with the end surface of the valve body (1), and the excircle diameter of the radial convex shoulder is larger than that of the base.
2. The double seat ball valve with replaceable valve seats of claim 1, wherein: the sealing ring (8) is made of wear-resistant alloy material, and a disc spring (9) is arranged between the sealing ring (8) and the bottom of the annular groove.
3. The double-seat ball valve with replaceable valve seats as claimed in claim 1 or 2, wherein: the outer circle surface of the base (10) consists of an external thread and a cylindrical surface, the cylindrical surface is positioned on one side of the valve cavity, the diameter of the outer circle of the cylindrical surface is smaller than the outer diameter of the external thread, and an O-shaped sealing ring (5) is embedded in the outer cylindrical surface and is connected with the inner cavity wall of the valve body (1) in a sealing mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021715073.6U CN212986110U (en) | 2020-08-18 | 2020-08-18 | Double-sealing seat ball valve with replaceable valve seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021715073.6U CN212986110U (en) | 2020-08-18 | 2020-08-18 | Double-sealing seat ball valve with replaceable valve seat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212986110U true CN212986110U (en) | 2021-04-16 |
Family
ID=75433272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021715073.6U Active CN212986110U (en) | 2020-08-18 | 2020-08-18 | Double-sealing seat ball valve with replaceable valve seat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212986110U (en) |
-
2020
- 2020-08-18 CN CN202021715073.6U patent/CN212986110U/en active Active
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