CN203500548U - Air source ball valve - Google Patents

Abstract

The utility model provides a gas source ball valve. The gas source ball valve comprises a left joint, a ball body, a valve rod, a valve rod sealing gasket, a valve body, joint sealing gaskets, valve seats, a right joint, a nut and a dual ferrule combination, wherein the left joint and the right joint are respectively disposed at left and right sides of the valve body, the valve seats are respectively disposed in end faces of the left joint and the right joint, the ball body is disposed on the valve seats, and the valve rod stretches into the valve body and is clamped in a groove formed on the ball body; the contact surface between the valve rod and the valve body is provided with the valve rod sealing gasket, and the contact surface between the valve body and the left joint and the contact surface between the valve body and the right joint are respectively provided with the joint sealing gaskets; and the dual ferrule combination is disposed on the right joint, and the nut is disposed outside the dual ferrule combination. The valve body of the gas source ball valve is prepared from forged steel materials, the valve rod is connected with the groove in the ball body surrounded by the two pieces of valve seats, and the ball body is fixed and sealed by locking the valve body and the joints at the two sides of the valve body. The gas source ball valve is simple in structure and high in sealing performance due to threaded ferrule connection.

Description

Air source ball valve

technical field

The utility model belongs to the field of valves, in particular to an air source ball valve.

Background technique

The air source ball valve is a new type of valve widely used in recent years. The air source ball valve is mainly used to cut off, distribute and change the flow direction of the medium in the pipeline. It has the following advantages: 1. The fluid resistance is small, and its resistance coefficient is equal to that of the pipe section of the same length. 2. Simple structure, small size and light weight. 3. Tight and reliable. At present, the sealing surface material of the air source ball valve is widely used in plastics, which has good sealing performance and has been widely used in vacuum systems. 4. It is easy to operate and open and close quickly. It only needs to rotate 90° from fully open to fully closed, which is convenient for long-distance control. 5. The maintenance is convenient, the structure of the air source ball valve is simple, the sealing ring is generally movable, and it is convenient to disassemble and replace. 6. When fully open or fully closed, the sealing surface of the ball and the valve seat is isolated from the medium, and when the medium passes through, it will not cause erosion of the valve sealing surface. 7. Wide application range.

The working principle of the air source ball valve is to make the valve unblocked or blocked by rotating the valve stem. The sealing surface and spherical surface of the air source ball valve are often in a closed state, which is not easy to be eroded by the medium, and has been widely used in various industries. Air source ball valve and plug valve belong to the same type of valve, only its closing part is a sphere, and the sphere rotates around the center line of the valve body to achieve opening and closing.

Air source ball valve usually consists of valve body, valve seat, valve stem, ball, gasket, packing and handle. The material of the valve body in the air source ball valve is the shell material (also called the main body material), and the valve disc, ball, valve seat, valve stem, and sealing seat are often called internal parts, in addition to fasteners, seals, etc. However, the air source ball valves in the prior art generally have disadvantages such as complicated structure and poor sealing performance.

Utility model content

The utility model provides an air source ball valve with simple structure and good sealing performance aiming at the above-mentioned deficiencies in the prior art.

The utility model is achieved through the following technical solutions:

An air source ball valve, including a left joint, a ball, a valve stem, a valve stem gasket, a valve body, a joint gasket, a valve seat, a right joint, a nut and a combination of double ferrules, the left joint and the right joint are respectively arranged on the valve body On the left and right sides of the left and right joints, valve seats are provided on the end faces of the left joint and the right joint, and a ball is provided on the valve seat, and the valve stem extends into the valve body and is snapped into the groove opened on the ball; the valve stem A valve stem gasket is provided on the contact surface with the valve body, and a joint gasket is provided on the contact surface between the valve body and the left joint and the right joint; a double ferrule combination is provided on the right joint, and the double ferrule Nuts are arranged outside the combination.

A further setting of the present invention is that the air source ball valve also includes a packing gland and a packing, the packing is arranged in the gap between the valve stem and the valve body, and the packing gland is arranged on the packing.

A further setting of the present invention is that a wrench is installed on the valve stem, and the wrench is fastened on the valve stem through a hex nut.

A further setting of the utility model is that a positioning pin is also arranged on the wrench.

The valve body of the air source ball valve described in the utility model is made of forged steel, the valve stem is connected with the groove on the sphere surrounded by two valve seats, and the valve body and the joints on both sides are locked to fix and seal the sphere. It is thread ferrule type connection with simple structure and good sealing performance.

Description of drawings

Fig. 1 is the structural diagram of the air source ball valve described in the utility model;

The labels in the figure are: left joint 1, positioning pin 2, ball 3, packing gland 4, hex nut 5, valve stem 6, packing 7, valve stem gasket 8, valve body 9, joint gasket 10, valve seat 11. Right joint 12, nut 13, double ferrule combination 14, wrench 15.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.

As shown in Figure 1, the utility model provides an air source ball valve, including a left joint 1, a ball 3, a valve stem 6, a valve stem gasket 8, a valve body 9, a joint gasket 10, a valve seat 11, a right joint 12. The nut 13 and the double ferrule combination 14, the left joint 1 and the right joint 12 are respectively arranged on the left and right sides of the valve body 9, and the end faces of the left joint 1 and the right joint 12 are provided with valve seats 11, and the valve seats 11 is provided with a sphere 3, and the valve stem 6 extends into the valve body 9 and is snapped into the groove opened on the sphere 3; a valve stem gasket 8 is arranged on the contact surface between the valve stem 6 and the valve body 9, Joint sealing gaskets 10 are provided on the contact surfaces of the valve body 9 and the left joint 1 and the right joint 12; the right joint 12 is provided with a double ferrule combination 14, and a nut 13 is disposed outside the double ferrule combination 14.

The air source ball valve also includes a packing gland 4 and a packing 7 , the packing 7 is arranged in the gap between the valve stem 6 and the valve body 9 , and the packing gland 4 is arranged on the packing 7 . A wrench 15 is also installed on the valve stem 6 , and the wrench 15 is fastened on the valve stem 6 through a hex nut 5 . A positioning pin 2 is also arranged on the wrench 15 .

The gas source ball valve described in the utility model should be installed so that the flow direction of the medium is consistent with the direction of the arrow on the valve body. Valve maintenance instructions are as follows:

1. Select the basic structure of the valve according to the purpose of the valve.

2. Select the material of the valve according to the pressure, temperature, corrosiveness of the medium, whether it contains particles and debris, etc.

3. It is necessary to check whether the signs and certificates on the valve meet the requirements for use during installation.

4. Check the inner cavity and sealing surface of the valve, and no dirt is allowed to adhere.

5. Check whether the connecting bolts are evenly tightened.

6. Check whether the packing is tight, and the sealing of the packing should be ensured, but the lifting of the valve stem should not be hindered.

7. The valve should be installed according to the requirements of use, but attention must be paid to the convenience of maintenance and operation.

8. The valve is required to be fully opened or fully closed during use, and it is not allowed to partially open the valve for regulating flow.

9. When the valve is in use, it should always be filled with oil in the rotating part, and the trapezoidal thread part of the valve stem should be oiled.

10. For manual valves, when opening or closing operations, the handwheel should be used to open and close, and auxiliary levers or other tools should not be used.

11. After the valve is used, it should be checked regularly to check whether the sealing surface, valve stem, gasket and packing are worn. If damaged, it should be repaired or replaced in time.

It is obvious to those skilled in the art that the present utility model can be changed in many ways, and such changes are not considered to depart from the scope of the present utility model. All such modifications obvious to those skilled in the art are intended to be included within the scope of this claim.

Claims (4)

1. An air source ball valve, characterized in that it includes a left joint (1), a ball (3), a valve stem (6), a valve stem gasket (8), a valve body (9), and a joint gasket (10) , the valve seat (11), the right joint (12), the nut (13) and the double ferrule combination (14), the left joint (1) and the right joint (12) are respectively arranged on the left and right sides of the valve body (9), Both the left joint (1) and the right joint (12) are provided with a valve seat (11) on the end faces, the valve seat (11) is provided with a ball (3), and the valve stem (6) extends into the valve body ( 9) It is snapped into the groove opened on the sphere (3); a valve stem gasket (8) is provided on the contact surface between the valve stem (6) and the valve body (9), and the valve body (9) A joint gasket (10) is provided on the contact surface with the left joint (1) and the right joint (12); the right joint (12) is provided with a double ferrule combination (14), and the double ferrule combination (14 ) is provided with a nut (13). 2. The air source ball valve according to claim 1, characterized in that, the air source ball valve also includes a packing gland (4) and packing (7), and the packing (7) is arranged between the valve stem (6) and In the gap between the valve bodies (9), the packing gland (4) is arranged on the packing (7). 3. The air source ball valve according to claim 1, characterized in that a wrench (15) is installed on the valve stem (6), and the wrench (15) is fastened to the valve by a hex nut (5). on the rod (6). 4. The air source ball valve according to claim 3, characterized in that, the wrench (15) is also provided with a positioning pin (2).

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