CN214305358U

CN214305358U - Valve seat sealing structure of ball screw flat valve

Info

Publication number: CN214305358U
Application number: CN202023280422.9U
Authority: CN
Inventors: 严春龙; 陈方政
Original assignee: Anlan Technology Jiangsu Co ltd
Current assignee: Anlan Technology Jiangsu Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-09-28
Anticipated expiration: 2030-12-31

Abstract

The utility model discloses a ball screw flat valve seat sealing structure, which comprises a valve body and a valve seat, wherein the valve seat is assembled in an axial central hole of the valve body, flow passage holes are respectively and radially arranged on the valve seat and the valve body, and the valve seat flow passage hole is matched and corresponds to the valve body flow passage hole; the method is characterized in that: an annular groove is formed in the outer wall surface of the valve seat at the periphery of the valve seat flow passage hole, and a valve seat sealing structure is embedded in the annular groove; the valve seat sealing structure is a sealing ring assembly, the valve seat forms sealing with the inner wall surface of the valve body through the sealing ring assembly on the outer wall surface, and fluid in a valve seat flow passage hole and a valve body flow passage hole is prevented from entering the valve cavity. The utility model discloses guaranteeing the ball wafer valve through-flow and under the excellent prerequisite of damming characteristic, optimizing the assembly structure of disk seat and valve body, the ball wafer valve assembly of being convenient for, it is sealed effectual, the reliability is high, and the practicality is strong.

Description

Valve seat sealing structure of ball screw flat valve

Technical Field

The utility model relates to a fracturing valve on oil gas exploitation equipment and the pipeline specifically is a ball wafer valve disk seat seal structure.

Background

The ball screw plate valve is one of the important control valves in oil and gas exploitation equipment and conveying pipeline and consists of valve body, valve cover, valve seat, gate, valve rod, bearing seat, tail rod, ball screw, hand wheel and other parts. The valve body is provided with a central hole in the axial direction, the central hole is used for assembling the valve seat, and the valve body is provided with a flow passage hole in the radial direction and communicated with the central hole of the valve body; the valve cover is hermetically connected to two ends of the valve body through connecting bolts, and the upper end of the valve cover is connected with a bearing seat and a rotating shaft; the valve seat is radially provided with a flow passage hole, the valve seat is assembled in the central hole of the valve body, the valve seat flow passage hole on the valve seat is matched and corresponding to the valve body flow passage hole on the valve body, the upper part of the flashboard is connected with the valve rod, and the lower part of the flashboard is connected with the balance tail rod; the valve rod passes through the valve cover, extends out of the top of the valve cover, is connected with the ball screw and then is connected with the hand wheel. Referring to fig. 1, in order to provide good through-flow and shut-off characteristics of the ball screw plate valve, it is required that the valve seat flow passage hole and the valve body flow passage hole of the ball screw plate valve form good joint sealing, that is, a fitting gap between the valve seat and the valve body forms good sealing. The traditional sealing measure is to radially embed the valve seat into a valve body flow passage hole of the valve body, a larger spigot joint surface is formed between the valve seat and the valve body, a circumferential annular groove is arranged on an outer convex part of the valve seat embedded into the valve body, an O-shaped sealing ring is embedded in the annular groove of the valve seat embedded into the valve body, the spigot joint surface between the valve seat and the valve body is well sealed through the O-shaped sealing ring, meanwhile, a wave spring is additionally arranged between the end surface of the outer convex part of the valve seat embedded into the valve body and the inner wall surface of the valve body, and the sealing effect of the valve seat and the valve body is further improved through the elasticity of the wave spring. This sealing measure can certainly play good sealed effect, but, because the disk seat is radial embedded structure by a wide margin on the valve body for the disk seat is big in the assembly degree of difficulty on the valve body, and assembly process is complicated, and workman intensity of labour is big, and assembly efficiency is low, has directly increased the manufacturing cost of ball wafer valve, and the ball wafer valve of this kind of structure is when using in addition, and the switching torque of demand is big, and the reliability is poor, and is not practical enough.

Disclosure of Invention

The utility model aims to provide a: the ball screw flat valve seat sealing structure has the advantages that the ball screw flat valve seat sealing structure is good in sealing effect, high in reliability and strong in practicability, the assembling structure of the valve seat and the valve body is optimized on the premise that the through flow and cutoff characteristics of the ball screw flat valve are excellent, and the ball screw flat valve is convenient to assemble.

The utility model adopts the technical proposal that: a ball screw flat valve seat sealing structure comprises a valve body and a valve seat, wherein the valve seat is assembled in an axial central hole of the valve body, flow passage holes are respectively and radially formed in the valve seat and the valve body, and the flow passage holes of the valve seat correspond to the flow passage holes of the valve body in a matching manner; the method is characterized in that: an annular groove is formed in the outer wall surface of the valve seat at the periphery of the valve seat flow passage hole, and a valve seat sealing structure is embedded in the annular groove; the valve seat sealing structure is a sealing ring assembly, the valve seat forms sealing with the inner wall surface of the valve body through the sealing ring assembly on the outer wall surface, and fluid in a valve seat flow passage hole and a valve body flow passage hole is prevented from entering the valve cavity.

Furthermore, the sealing ring assembly embedded in the annular groove on the outer wall surface of the valve seat comprises an inner check ring, an outer check ring and a T-shaped ring, the T-shaped ring forms sealing with the inner wall surface of the valve body in the annular groove, and the inner check ring and the outer check ring are respectively arranged on two side shoulders of the T-shaped ring.

The utility model has the advantages that: 1. the valve seat is assembled in the axial central hole of the valve body, the sealing of the valve seat and the valve body is realized by the sealing ring component embedded on the outer wall surface of the valve seat at the periphery of the flow passage hole of the valve seat, the sealing effect is good, and the sealing is reliable and stable; 2. the valve seat does not need to be embedded into the valve body in a large radial direction, the valve seat is simple in assembly structure on the valve body and convenient to assemble, labor intensity of workers is relieved, assembly efficiency is improved, and production cost of the ball screw flat valve is effectively reduced; 3. when the ball screw flat valve is used, the required switching torque of the ball screw flat valve is small, the reliability is high, and the practicability is strong; 4. the inner retainer ring and the outer retainer ring of the sealing ring assembly are made of 316, the T-shaped ring is made of hydrogenated nitrile rubber, the actuating effect of the T-shaped rubber ring overcomes slight eccentricity of a matching surface and abrasion of sealing, expected sealing performance is continuously kept, and the sealing ring is applied to high-temperature and corrosive fluids and has no swelling property.

Drawings

Fig. 1 is a conventional sealing structure of a valve seat of a ball screw flat valve.

Fig. 2 is a schematic structural diagram of the ball screw flat valve of the present invention.

Fig. 3 is a partially enlarged view of the valve seat sealing structure of fig. 2.

In the figure: 1 valve body, 2 disk seats, 3 flashboards, 4 valve rods, 5 valve covers, 6 bearing seats, 7 ball screws, 8 hand wheels, 9 connecting bolts, 10 tail rods, 11 inner check rings, 12 outer check rings and 13T-shaped rings.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in fig. 2, the ball screw flat valve comprises a valve body 1, a valve seat 2, a gate plate 3, a valve rod 4, a valve cover 5, a bearing seat 6, a ball screw 7, a hand wheel 8 and a tail rod 10; the axial direction of the valve body 1 is provided with a central hole, the radial direction of the valve body 1 is provided with a flow passage hole, the radial direction of the valve seat 2 is provided with a flow passage hole, the valve seat 2 is assembled in the central hole of the valve body 1, the valve body flow passage hole is communicated with the central hole of the valve body, the valve seat flow passage hole is matched and corresponding to the valve body flow passage hole, the valve cover 5 is hermetically connected with two ends of the valve body 1 through a connecting bolt 9, the upper end of the valve cover 5 is connected with a bearing seat 6, the bearing seat 6 is connected with a ball screw 7, the upper part of the flashboard 3 positioned in the valve seat 2 is connected with a valve rod 4, the valve rod 4 extends out of the top of the valve cover 5 to be connected with the ball screw 7 and then connected with a hand wheel 8, and the lower part of the flashboard 3 is connected with a balance tail rod 10; the method is characterized in that: an annular groove is arranged on the outer wall surface of the valve seat at the periphery of the valve seat flow passage hole, and a valve seat sealing structure is embedded in the annular groove; the valve seat sealing structure is a sealing ring assembly, the valve seat forms sealing with the inner wall surface of the valve body through the sealing ring assembly on the outer wall surface, and fluid in a valve seat flow passage hole and a valve body flow passage hole is prevented from entering the valve cavity.

Furthermore, as shown in fig. 3, the sealing ring assembly embedded in the annular groove on the outer wall surface of the valve seat comprises an inner retaining ring 11, an outer retaining ring 12 and a T-shaped ring 13, the T-shaped ring 13 forms a seal with the inner wall surface of the valve body in the annular groove, and the inner retaining ring 11 and the outer retaining ring 12 are respectively mounted on two side shoulders of the T-shaped ring 13.

Claims

1. The ball screw flat valve comprises a valve body (1), a valve seat (2), a flashboard (3), a valve rod (4), a valve cover (5), a bearing seat (6), a ball screw (7), a hand wheel (8) and a tail rod (10); the axial direction of the valve body (1) is provided with a central hole, the radial direction of the valve body (1) is provided with a flow passage hole, the radial direction of the valve seat (2) is provided with a flow passage hole, the valve seat (2) is assembled in the central hole of the valve body (1), the flow passage hole of the valve body is communicated with the central hole of the valve body, the flow passage hole of the valve seat is matched and corresponding to the flow passage hole of the valve body, the valve cover (5) is hermetically connected with two ends of the valve body (1) through a connecting bolt (9), the upper end of the valve cover (5) is connected with a bearing seat (6), the bearing seat (6) is connected with a ball screw (7), the upper part of the flashboard (3) positioned in the valve seat (2) is connected with a valve rod (4), the valve rod (4) extends out of the top of the valve cover (5) to be connected with the ball screw (7) and then connected with a hand wheel (8), and the lower part of the flashboard (3) is connected with a balance tail rod (10); the method is characterized in that: an annular groove is arranged on the outer wall surface of the valve seat at the periphery of the valve seat flow passage hole, and a valve seat sealing structure is embedded in the annular groove; the valve seat sealing structure is a sealing ring assembly, the valve seat forms sealing with the inner wall surface of the valve body through the sealing ring assembly on the outer wall surface, and fluid in a valve seat flow passage hole and a valve body flow passage hole is prevented from entering the valve cavity.

2. The ball screw plate valve seat sealing structure according to claim 1, wherein: the sealing ring component embedded in the annular groove on the outer wall surface of the valve seat comprises an inner retainer ring (11), an outer retainer ring (12) and a T-shaped ring (13), the T-shaped ring (13) forms sealing with the inner wall surface of the valve body in the annular groove, and the inner retainer ring (11) and the outer retainer ring (12) are respectively arranged on two side shoulders of the T-shaped ring (13).