CN204900915U - Three formula ball valves - Google Patents

Abstract

The utility model relates to a ball valve, in particular to a three-piece ball valve, which belongs to the technical field of ball valves. A valve main body is provided, and a sphere is provided inside the valve main body, and the sphere has an internal hollow structure. Left and right connecting flanges are respectively provided on the left and right sides of the valve main body, and connecting bolts are provided. A valve stem is arranged on the sphere, and the valve stem passes through the valve body. A valve stem sealing ring is arranged at the bottom of the connection between the valve stem and the valve body, and a sealing packing is arranged at the top of the connection between the valve stem and the valve body. The top end of the valve stem is provided with a handle. The utility model has the advantages of providing a ball valve, which is composed of a valve main body and left and right connecting flanges. The above three parts are connected together by connecting bolts and nuts, which greatly facilitates the maintenance of the valve. Various sealing devices are arranged in the valve, which improves the sealing performance of the valve. The utility model has simple structure and convenient operation.

Description

Three piece ball valve

technical field

The utility model relates to a ball valve, in particular to a three-piece ball valve, which belongs to the technical field of ball valves. .

Background technique

The opening and closing part of the ball valve is a sphere, with a circular through hole or channel passing through its axis. It is driven by the valve stem and rotates around the axis of the valve stem, so as to realize the functions of cutting, distributing and changing the flow direction of the medium. The main features of the ball valve are compact structure, reliable sealing, simple structure, and convenient maintenance. field.

Ball valve, as a new type of valve widely used, its structure is mainly composed of valve body, ball, valve seat, valve stem, valve cover, packing, etc., in which the surface of the ball and the valve seat form an interference fit to form a seal, the traditional valve body It is divided into two parts, the left valve body and the right valve body, which are usually made of high temperature resistant metal or non-metallic materials, and the ball is usually made of stainless steel and related high temperature resistant materials. When opening or closing the valve, the ball is driven by the handle to rotate, and the surface of the ball is gradually worn under the influence of friction and other effects. Regardless of whether the valve body is sealed with a hard seal or a soft seal, due to the influence of the stainless steel metal or other metal surface on its own material, processing, valve body material, design, etc., the friction force increases. During the frequent opening and closing of the valve, The seal between the ball and the valve seat will continue to interfere and cause wear, which accelerates the wear rate and reduces the service life of the valve. If the traditional two-piece ball valve is damaged, it is difficult to disassemble and repair.

Contents of the invention

The technical problem to be solved by the utility model is to provide a three-piece ball valve to solve the problems faced by the current two-piece ball valve.

In order to solve the above-mentioned technical problems, the utility model is realized through the following technical solutions: a three-piece ball valve is provided with a valve body, a ball is arranged inside the valve body, the ball is an internal hollow structure, and the valve body is The left and right connecting flanges are respectively provided on the left and right sides of the valve body, and connecting bolts are provided. The connecting bolts connect the valve main body, the left connecting flange and the right connecting flange to each other. There is a valve stem, which passes through the valve body.

The bottom of the connection between the valve stem and the valve main body is provided with a valve stem sealing ring, the top of the connection between the valve stem and the valve main body is provided with sealing packing, and the upper part of the sealing packing is provided with a packing pressing ring.

The top of the valve stem is provided with a handle, the bottom of the handle is provided with a handle gland, the upper part of the handle is fixedly connected with a handle nut, and a butterfly spring is arranged between the packing compression ring and the handle gland. The connecting bolts are stud bolts, and the stud bolts are connected with nuts.

A valve seat is provided at the bottom of the sphere, a valve body sealing ring is provided between the valve seat and the valve body, and the material of the sealing packing is PTFE.

Compared with the prior art, the utility model has the advantages of providing a ball valve, which is composed of the valve body and the left and right connecting flanges, and the above three parts are connected together by connecting bolts and nuts, thereby realizing the combination The use of the type valve, this arrangement of the combined valve greatly facilitates the maintenance of the valve, and the sealing performance of the valve is improved by setting various sealing devices in the valve. The utility model has a simple structure and is easy to operate.

Description of drawings:

Below in conjunction with accompanying drawing, the utility model is further described.

Fig. 1 is a structural representation of the utility model.

In the figure: 1. Valve main body; 2. Ball; 3. Left connecting flange; 4. Right connecting flange; 5. Connecting bolt; 6. Valve stem; 7. Valve stem sealing ring; 8. Sealing packing; 9. Packing ring; 10, handle; 11, handle gland; 12, handle nut; 13, butterfly spring; 14, nut; 15, valve seat; 16, valve body sealing ring.

Detailed ways:

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments: According to a three-piece ball valve shown in Fig. Internal hollow structure, the left and right sides of the valve body 1 are respectively provided with a left connecting flange 3 and a right connecting flange 4, and connecting bolts 5 are provided, and the connecting bolts connect the valve body 1 and the left connecting flange 3 and the right The connecting flanges 4 are fixedly connected together, the ball 2 is provided with a valve stem 6, the valve stem 6 passes through the valve body 1, and the bottom of the connection between the valve stem 6 and the valve body 1 is provided with a valve stem seal Ring 7, the top of the connection between the valve stem 6 and the valve body 1 is provided with a sealing packing 8, and the upper part of the sealing packing 8 is provided with a packing pressure ring 9.

The top of the valve stem 6 is provided with a handle 10, the bottom of the handle 10 is provided with a handle gland 11, the upper part of the handle 10 is fixedly connected with a handle nut 12, and the packing ring 9 and the handle gland 11 A butterfly spring 13 is arranged between them, and the connecting bolt 5 is a stud bolt on which a nut 14 is connected. A valve body sealing ring 16 is arranged between them, and the material of the sealing packing 8 is PTFE.

When in use, the valve main body 1 is set up, and the left connecting flange 3 and the right connecting flange 4 are respectively arranged on the left and right sides of the valve main body 1, and the valve main body 1 and the left connecting flange 3 are connected with the right connecting bolt 5 The flanges 4 are respectively connected together, and nuts 14 are fixedly connected to both ends of the connecting bolt 5, so that the valve main body 1, the left connecting flange 3 and the right connecting flange 4 are fixed together to form a whole, and the valve main body 1 A sphere 2 is arranged inside, and a valve stem 6 is set in the sphere 2, the valve stem 6 passes through the valve body 1, and the bottom of the connection between the valve stem 6 and the valve body 1 is provided with a valve stem sealing ring 7, so A sealing packing 8 is provided on the top of the joint between the valve stem 6 and the valve body 1 , and a packing pressure ring 9 is provided on the top of the sealing packing 8 .

It should be emphasized that: the above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model in any form. Any simple modification, equivalent change and Modifications still belong to the scope of the technical solution of the utility model. .

Claims (7)

1. a three-flat ball valve, it is characterized in that: be provided with valve body (1), spheroid (2) is provided with in described valve body (1), described spheroid (2) is in hollow structure inside, the left and right sides of described valve body (1) is respectively arranged with left adpting flange (3) and right adpting flange (4), be provided with connecting bolt (5), valve body (1) and left adpting flange (3) and right adpting flange (4) are mutually permanently connected together by described connecting bolt, described spheroid (2) is provided with valve rod (6), described valve rod (6) is through valve body (1).

2. three-flat ball valve according to claim 1, it is characterized in that: described valve rod (6) is provided with valve stem seal ring (7) with the bottom of valve body (1) joint, described valve rod (6) is provided with stuffing box packing (8) with the top of valve body (1) joint, and the top of described stuffing box packing (8) is provided with packing press ring (9).

3. three-flat ball valve according to claim 1, it is characterized in that: the top of described valve rod (6) is provided with handle (10), the bottom of described handle (10) is provided with handle gland (11), and the top of described handle (10) is fixedly connected with and is provided with handle nut (12).

4. three-flat ball valve according to claim 2, is characterized in that: be provided with butterfly spring (13) between described packing press ring (9) and handle gland (11).

5. three-flat ball valve according to claim 1, is characterized in that: connecting bolt (5) is stud bolt, described stud bolt is connected with nut (14).

6. three-flat ball valve according to claim 1, is characterized in that: the bottom of described spheroid (2) is provided with valve seat (15), is provided with valve seal ring (16) between described valve seat (15) and valve body (1).

7. three-flat ball valve according to claim 2, is characterized in that: the material of described stuffing box packing (8) is PTFE.