Stretch spherical gate valve, stretch spherical gate valve, stretch spherical gate valve, the opening and closing parts of the gate valve are the gate plate, the movement direction of the gate plate is perpendicular to the fluid direction, the gate valve can only be fully opened and fully closed, not suitable for cooperative adjustment and throttling. The gate plate has two sealing surfaces, and the two sealing surfaces of the commonly used wedge gate valve form a wedge, and the wedge angle varies with the valve parameters, usually 5O. The gate plate of the wedge gate valve can be made into a whole, called a rigid gate plate; It can also be made into a gate plate that can produce a trace amount of deformation to improve its processability and make up for the deviation of the angle of the sealing surface during processing, which is called an elastic gate.

The types of gate valves can be divided into wedge gate valves and parallel gate valves according to the configuration of the sealing surface, and wedge gate valves can be divided into: single gate type, double gate type and elastic gate type; Parallel gate type gate valves can be divided into single gate type and double gate type. According to the thread position of the valve stem, it can be divided into two types: open rod gate valve and dark rod gate valve. When the gate valve is closed, the sealing surface can only rely on the medium pressure to seal, that is, rely on the medium pressure to press the sealing surface of the gate plate to the valve seat on the other side to ensure the sealing of the sealing surface, which is self-sealing. Most gate valves are forced sealed, that is, when the valve is closed, it is necessary to rely on external force to forcibly press the gate plate to the valve seat to ensure the tightness of the sealing surface. The present invention relates to a stretched spherical gate valve, comprising a valve body,

The valve cover, bracket, stem and gate plate, the valve stem and the gate plate in the valve body are connected, the gate plate is composed of a wedge cone and a spherical valve disc connected by a dovetail groove on both sides of the wedge cone, the upper and lower spherical discs are provided with limit rings and limit discs, the valve stem is connected with the wedge cone, the valve stem is transversely equipped with cross pins, rollers are set at both ends of the cross pins, and the rollers are matched with continuous chutes and spiral guide grooves on the walls on both sides of the bracket. Hongfeng believes that the utility model overcomes the existing gate valve opening and closing defects of large moving distance, long opening and closing time, and fast wear of the sealing surface, and has the advantages of fast opening and closing speed, no relative friction between sealing pairs, labor-saving operation and long service life, according to the determination, its opening and closing time is only one-fifth to one-tenth of the ordinary gate valve of the same specification.

Gate valves offer the following advantages:
1. The fluid resistance is small, and the sealing surface is washed and eroded by the medium is small.
2. Less effort to open and close.
3. The flow direction of the medium is not limited, and the flow does not disturb or reduce the pressure.
4. Simple shape, short structure length, good manufacturing process, wide range of application.
NOMINAL PRESSURE OR PRESSURE LEVEL: PN1.0-16.0MPa, ANSI CLASS 150-300LB, JIS10-20K
Nominal diameter or caliber: DN10~1000, NPS 1/2 ~36"
Connection method: flange, butt weld, thread, etc
Applicable temperature: -196°C~700°C
Drive mode: manual, bevel gear transmission, pneumatic, electric, hydraulic, gas-liquid linkage, electro-hydraulic linkage