CN218954089U

CN218954089U - Hard seal floating ball valve capable of being closed pneumatically and automatically by forged steel

Info

Publication number: CN218954089U
Application number: CN202223267088.2U
Authority: CN
Inventors: 吴雪明; 赵越
Original assignee: SUZHOU SIP STARD VALVE CO Ltd
Current assignee: SUZHOU SIP STARD VALVE CO Ltd
Priority date: 2022-12-06
Filing date: 2022-12-06
Publication date: 2023-05-02
Anticipated expiration: 2032-12-06

Abstract

The utility model discloses a hard seal floating ball valve capable of being closed pneumatically and automatically by forged steel. The valve comprises a valve structure, a lower sealing section and an upper sealing section, wherein the valve structure comprises a valve body, a valve cover and a ball body, the valve body and the valve cover are fixedly connected by adopting a mounting nut and a mounting stud, a left metal valve seat and a right metal valve seat are respectively arranged on two sides of the ball body, and the top end of the ball body is connected with the bottom end of a valve rod; the lower sealing section comprises a valve seat spring, a fifth O-shaped ring and a winding type graphite gasket, wherein the valve seat spring is arranged between the valve cover and the left metal valve seat, and the joint of the valve cover and the valve body is sealed by the winding type graphite gasket and the fifth O-shaped ring; the upper seal segment is located between the valve stem and the valve body. The ball valve adopts a two-piece forging structure, has the characteristics of low cost, simple structure and high sealing performance and wear resistance, is convenient to assemble and disassemble, and can be further provided with a fireproof function by the arrangement of a remote control switch and a graphite gasket.

Description

Hard seal floating ball valve capable of being closed pneumatically and automatically by forged steel

Technical Field

The utility model relates to the technical field of valves, in particular to a hard sealing floating ball valve capable of being closed pneumatically and automatically by forged steel.

Background

Compared with other types of valves, the two-piece ball valve is structurally characterized in that the closing member is a sphere, the sphere rotates around the center line of the valve body to achieve opening and closing, and the ball valve mainly plays roles in cutting off, distributing and changing the flow direction of a medium in a pipeline.

Such as Chinese patent number: the metal hard sealing structure of the two-piece ball valve comprises a CN201020506833.2 valve cover, wherein the valve cover is connected with a valve body through threads, a circle of cap edge is arranged at the position, adjacent to an external thread, of the valve cover, a circle of convex ribs are arranged on the cap edge and propped against a sealing surface, which is in contact with the valve cover and the valve body, of the valve cover, the convex ribs are in line contact with the sealing surface of the valve body for sealing, and the valve body can be prevented from being damaged when being twisted.

However, the structure of the utility model is inconvenient to detach and install, the disassembly and assembly are complex, the structure is simple, the control mode is single, and the automatic closing can not be realized under the emergency working condition so as to ensure the quality of the subsequent processed products.

Disclosure of Invention

In order to solve the problems, the utility model provides a hard sealing floating ball valve capable of being closed pneumatically and automatically by forged steel.

The main content of the utility model comprises:

the valve structure comprises a valve body, a valve cover and a ball body, wherein the valve body is fixedly connected with the valve cover by adopting a mounting nut and a mounting stud, a left metal valve seat and a right metal valve seat are respectively arranged on two sides of the ball body, and the top end of the ball body is connected with the bottom end of the valve rod;

the lower sealing section comprises a valve seat spring, a fifth O-shaped ring and a winding type graphite gasket, wherein the valve seat spring is arranged between the valve cover and the left metal valve seat, and the joint of the valve cover and the valve body is sealed by the winding type graphite gasket and the fifth O-shaped ring;

an upper seal segment located between the valve stem and the valve body.

Preferably, the lower sealing section comprises a fourth O-shaped ring positioned at the joint of the valve body and the side surface of the right metal valve seat, the surface of the right metal valve seat is provided with an annular groove, and the third O-shaped ring is arranged in the annular groove

Preferably, the upper sealing section comprises a first O-shaped ring, a second O-shaped ring and a sealing graphite gasket, an annular sealing groove is formed in the top end of the valve rod and the top end of the valve body, an O-shaped ring support is arranged in the annular sealing groove, the second O-shaped ring is arranged on the inner surface of the O-shaped ring support, the second O-shaped ring is sleeved on the surface of the valve rod, and the first O-shaped ring is sleeved on the surface of the valve rod.

Preferably, a sealing graphite gasket is arranged in the annular sealing groove and sleeved on the surface of the valve rod, and the sealing graphite gasket is positioned at the top of the O-shaped ring bracket.

Preferably, the valve rod extends out of one end surface of the valve body and is provided with a locking plate, a locking nut is arranged on the surface of the locking plate, the bottom of the locking plate is provided with a pressing sleeve, and the pressing sleeve is inserted into the sealing groove.

Preferably, a bearing is arranged between the bottom end of the valve rod and the valve body, and the first O-shaped ring is positioned above the bearing level.

Preferably, the top of the valve rod is connected with an air cylinder, and the air cylinder is fixedly connected with the top of the valve body by adopting a bracket.

Preferably, the valve body and the valve cover are both of forged steel structures.

Preferably, the sphere material is f304+ni60.

The utility model provides a hard sealing floating ball valve capable of being closed pneumatically and automatically by forged steel, which has the advantages of good sealing property, low leakage rate, flexible switching and good wear resistance; the novel fire-proof switch is simple and convenient to assemble and disassemble, can be remotely controlled to be opened and closed, adopts a two-piece forging structure, is simple in structure, low in cost, short in production period, high in product quality, easy to install and disassemble and easy to interchange, and has a fire-proof function.

Drawings

FIG. 1 is a schematic view of the structure of a hard seal floating ball valve of the present utility model.

The components in the drawings are marked as follows: 1-valve body, 11-O-shaped ring, 12-second O-shaped ring, 13-third O-shaped ring, 14-fourth O-shaped ring, 15-winding graphite gasket, 16-sealing graphite gasket, 2-valve cover, 20-bearing, 21-pressing sleeve, 22-disc spring, 3-ball, 30-locking nut, 31-locking plate, 32-valve seat spring, 33-cylinder, 4-valve rod, 40-packing, 5-left metal valve seat, 6-right metal valve seat, 7-mounting stud, 8-mounting nut, 9-O-shaped ring bracket and 10-fifth O-shaped ring.

Detailed Description

The technical scheme protected by the utility model is specifically described below with reference to the accompanying drawings.

Referring to fig. 1, the utility model provides a hard seal floating ball valve capable of being closed pneumatically and automatically by forged steel, which comprises a valve structure, a lower sealing section and an upper sealing section, wherein the valve structure comprises a valve body 1, a valve cover 2 and a ball body 3, the valve body 1 and the valve cover 2 are fixedly connected by adopting a mounting nut 8 and a mounting stud 7, the functions of easy installation, easy disassembly and easy exchange of products are realized by the mounting nut 8 and the mounting stud 7, a left metal valve seat 5 and a right metal valve seat 6 are respectively arranged on two sides of the ball body 3, and the top end of the ball body 3 is connected with the bottom end of a valve rod 4. The upper sealing section is located between the valve stem 4 and the valve body 1. The lower seal section comprises a valve seat spring 32, a fifth O-shaped ring 10 and a winding type graphite gasket 15, wherein the valve seat spring 32 is arranged between the valve cover 2 and the left metal valve seat 5, when a medium flows from the valve cover 2 to the valve body 1, the metal valve seat 6 and the sealing surface of the ball body 3 are tightly attached, reliable sealing effect is achieved, the joint of the valve cover 2 and the valve body 1 is sealed by the winding type graphite gasket 15 and the fifth O-shaped ring 10, and if a fire disaster occurs in the surrounding environment of the valve, the ball valve can achieve sealing effect through the winding type graphite gasket and the graphite gasket, so that the ball valve has a fireproof function.

The lower sealing section comprises a fourth O-shaped ring 14 positioned at the joint of the valve body 1 and the side surface of the right metal valve seat 6, an annular groove is formed in the surface of the right metal valve seat 6, and a third O-shaped ring 13 is arranged in the annular groove. The upper sealing section comprises an O-shaped ring 11, a second O-shaped ring 12 and a sealing graphite gasket 16, wherein an annular sealing groove is formed in the top end of the valve rod 4 and the top end of the valve body 1, an O-shaped ring support 9 is arranged in the annular sealing groove, the second O-shaped ring 12 is arranged on the inner surface of the O-shaped ring support 9, the second O-shaped ring 12 is sleeved on the surface of the valve rod 4, and the first O-shaped ring 11 is sleeved on the surface of the valve rod 4. The inside of the annular sealing groove is provided with a sealing graphite gasket 16 which is sleeved on the surface of the valve rod 4, and the sealing graphite gasket 16 is positioned at the top of the O-shaped ring bracket 9. The valve rod 4 extends out one end surface of the valve body 1 and is provided with a locking plate 31, a locking nut 30 is arranged on the surface of the locking plate 31, the bottom of the locking plate 31 is provided with a pressing sleeve 21, and the pressing sleeve 21 is inserted into the sealing groove.

Furthermore, a bearing 20 is arranged between the bottom end of the valve rod 4 and the valve body 1, the bearing 20 can reduce friction force between metals, effectively reduce valve torque and facilitate opening and closing, and the O-shaped ring 11 is positioned above the level of the bearing 20. The cylinder 33 is connected at valve rod 4 top, the cylinder 33 adopt the support with valve body 1 top fixed connection, can select the less model of use when selecting actuating mechanism, and the cost is reduced, and it is more convenient moreover to control the valve switch through the remote signal.

Finally, since the compression spring is installed in the air cylinder 33, the compression spring is compressed during ventilation, and when the air cylinder 33 loses air, the compression spring rebounds, so that the air cylinder 33 rotates reversely and automatically, and the valve can be driven to close automatically. The valve body 1 and the valve cover 2 are both of forged steel structures, and the ball 3 is made of F304+Ni60, so that the sealing surface has high hardness and good wear resistance.

The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present utility model.

Claims

1. A hard seal floating ball valve for pneumatic automatic closing of forged steel, comprising:

the valve structure comprises a valve body (1), a valve cover (2) and a ball body (3), wherein the valve body (1) and the valve cover (2) are fixedly connected through a mounting nut (8) and a mounting stud (7), a left metal valve seat (5) and a right metal valve seat (6) are respectively arranged on two sides of the ball body (3), and the top end of the ball body (3) is connected with the bottom end of a valve rod (4);

the lower sealing section comprises a valve seat spring (32), a fifth O-shaped ring (10) and a winding type graphite gasket (15), wherein the valve seat spring (32) is arranged between the valve cover (2) and the left metal valve seat (5), and the joint of the valve cover (2) and the valve body (1) is sealed by adopting the winding type graphite gasket (15) and the fifth O-shaped ring (10);

an upper sealing section located between the valve stem (4) and the valve body (1).

2. A forged steel pneumatic automatic closing hard sealing floating ball valve according to claim 1, characterized in that the lower sealing section comprises a fourth O-ring (14) at the junction of the valve body (1) and the side surface of the right metal valve seat (6), the surface of the right metal valve seat (6) is provided with an annular groove, and the annular groove is internally provided with a third O-ring (13).

3. The hard sealing floating ball valve with the pneumatic automatic closing of the forged steel according to claim 1, wherein the upper sealing section comprises a first O-shaped ring (11), a second O-shaped ring (12) and a sealing graphite gasket (16), an annular sealing groove is formed in the top end of the valve rod (4) and the top end of the valve body (1), an O-shaped ring support (9) is arranged in the annular sealing groove, the second O-shaped ring (12) is arranged on the inner surface of the O-shaped ring support (9), the second O-shaped ring (12) is sleeved on the surface of the valve rod (4), and the first O-shaped ring (11) is sleeved on the surface of the valve rod (4).

4. A forged steel pneumatic automatic closing hard sealing floating ball valve according to claim 3, characterized in that a sealing graphite gasket (16) is arranged in the annular sealing groove and sleeved on the surface of the valve rod (4), and the sealing graphite gasket (16) is positioned at the top of the O-shaped ring bracket (9).

5. The hard sealing floating ball valve with the pneumatic automatic closing of the forged steel according to claim 4, wherein a locking plate (31) is arranged on the surface of one end of the valve body (1) extending out of the valve rod (4), a locking nut (30) is arranged on the surface of the locking plate (31), a pressing sleeve (21) is arranged at the bottom of the locking plate (31), and the bottom end of the pressing sleeve (21) is inserted into the annular sealing groove.

6. A forged steel pneumatic automatic closing hard sealing floating ball valve according to claim 3, characterized in that a bearing (20) is arranged between the bottom end of the valve rod (4) and the valve body (1), and the O-ring (11) is positioned above the level of the bearing (20).

7. A forged steel pneumatic automatic closing hard sealing floating ball valve according to claim 1, characterized in that the top of the valve rod (4) is connected with a cylinder (33), and the cylinder (33) is fixedly connected with the top of the valve body (1) by adopting a bracket.

8. A forged steel pneumatic automatic closing hard seal floating ball valve according to claim 1, characterized in that the valve body (1) and the valve cover (2) are both of forged steel structure.

9. A forged steel pneumatic auto-closing hard seal floating ball valve according to claim 1, characterized in that the sphere (3) material is f304+ni60.