An anti-friction ball valve
An anti-friction, ball valve technology, applied to valve devices, cocks including cut-off devices, mechanical equipment, etc., can solve the problems of easy damage to the sealing surface of the valve seat, short service life, valve leakage, etc., and achieve small valve stem torque and reduce Wear and prolong life effects
Active Publication Date: 2020-02-18
FANGYUAN VALVE GROUP
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Problems solved by technology
[0002] The existing ball valve mainly includes a valve body, a valve seat, a ball and an upper valve stem. The ball is placed in the inner cavity of the valve body. It forms a seal with the outer surface of the ball. The ball is driven by the valve stem and rotates 90 degrees around the axis of the ball valve. It cooperates with the valve seat to open and close the fluid. The disadvantage is that the valve seat is sealed during the opening and closing of the ball. The surface of the ball will rub against the sealing surface of the ball, and the sealing surface of the valve seat will be easily damaged, resulting in valve leakage and short service life
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[0013] according to figure 1 , 2 It can be seen that this kind of anti-friction ball valve includes: valve body 1, valve seat 2, hemisphere 3, packing 9, gland 10, connecting bracket 11, upper valve stem 7, lower valve stem 4 and lower end cover 16, the valve body 1. The upper end of the middle part is provided with a connecting flange and a packing groove. The packing 9 is fixedly installed in the packing groove by the gland 10. The connecting bracket 11 is installed on the connecting flange through standard fasteners. The hemisphere 3 is placed in the valve body 1. The upper part of the hemisphere 3 is fixed with an upper rotor 12, the lower part of the hemisphere 3 is fixed with a lower rotor 13, the upper end of the upper valve stem 7 is provided with a keyway connected with an external driving device, and the lower end of the upper valve stem 7 passes through the packing groove It extends into the inner cavity of the valve body 1 and connects with the upper rotor 12. The...
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The invention relates to a friction-proof ball valve. The friction-proof ball valve is characterized in that a valve clack is arranged at the excircle position of a hemispheroid, and the valve clack is mounted at the excircle position of the hemispheroid by a thread; the valve clack is of a pipe structure; a valve clack sealing face which is capable of forming sealing with the sealing face of a valve base and forming a spherical surface is arranged at one end of the valve clack; an adjusting tongue is arranged on the upper portion of the other end of the valve clack; an adjusting clamping groove is formed in the end of the adjusting tongue; an adjusting nozzle is arranged on the upper rotating head; the adjusting tongue extends into the adjusting nozzle; the upper rotating head is internally provided with an inner wall matched with the excircle of the lower end of an upper valve rod; a starting and stopping clamping groove is formed in the inner wall; the starting and stopping clampinggroove is positioned on one side of the adjusting nozzle; and a clamping device is arranged on the lower portion of the upper valve rod. When the upper valve is rotated, the clamping device can switch between the adjusting clamping groove and the starting and stopping clamping groove; a fan-arc-shaped limiting groove with the radian of 90 degrees is formed in the inner cavity bottom of the valvebody; a pin shaft is arranged at the lower end of a lower rotating head; and the pin shaft extends into the limiting groove. The friction-proof ball valve has the advantages of being free of friction,long in service life and high in security.
Description
technical field [0001] The invention relates to a ball valve, in particular to an anti-friction ball valve. Background technique [0002] The existing ball valve mainly includes a valve body, a valve seat, a ball and an upper valve stem. The ball is placed in the inner cavity of the valve body. It forms a seal with the outer surface of the ball. The ball is driven by the valve stem and rotates 90 degrees around the axis of the ball valve. It cooperates with the valve seat to open and close the fluid. The disadvantage is that the valve seat is sealed during the opening and closing of the ball. There will be friction between the surface and the sealing surface of the ball, and the sealing surface of the valve seat will be easily damaged, resulting in valve leakage and short service life. Contents of the invention [0003] Aiming at the technical defects in the prior art, the invention provides an anti-friction ball valve with no friction between the sealing surface of the v...
Claims
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IPC IPC(8): F16K5/06F16K5/20
CPCF16K5/0605F16K5/204
Inventor 张新丰
Owner FANGYUAN VALVE GROUP