Double wedge double ball disc valve

Abstract

The invention discloses a double-wedge type double-ball disc valve, which is a valve that makes the ball open and close without applying external force through rotation transmission, and avoids and reduces local force, friction and wear. It has a valve body, a The valve seat of the flow channel in the body, the bracket of the valve body, the ball corresponding to the valve seat in the valve body, the valve stem connected with the ball, the valve stem passes through the sealing packing of the valve body, the screw on the upper end of the valve stem and the valve body bracket The handwheel nut is matched, the side of the valve stem has an L-shaped guide groove, and the bracket is fixed with a guide pin whose end is inserted into the guide groove; it is characterized in that: the ball is two left and right balls, and the upper part between the two balls The upper and lower parts are open upper and lower conical spaces, and the upper and lower conical spaces correspond to an upper wedge sphere and a lower wedge sphere. The upper end of the upper wedge sphere is fixedly connected with the lower end of the stem, and the lower wedge sphere The lower end is connected with the valve body, and the upper end of the upper wedge sphere or the lower end of the valve stem also has a protruding pin, and the two ends of the pin are respectively located in the transverse grooves left on the upper ends of the two ball discs.

Description

technical field

[0001] The invention relates to a new type of ball valve, especially a double-disc ball valve with a device for separating or pressing the sealing surfaces on both sides of the ball plug from the valve seat. A ball valve that actuates a ball plug to close or open. Background technique

[0002] At present, the ball valves (floating type, fixed type) used at home and abroad, when the ball rotates to implement the switch, the ball and the seat surface will produce sliding friction, which will cause the sealing surface to wear and scratch, which is also the main reason for the leakage and jamming of the valve seat sealing surface. . When the ball rotates under the heavy load of the pipeline medium, the sassafras and large load torque are the key technical problems to be solved urgently for the ball valve. In order to solve such problems, the Chinese utility model patent specification disclosed a "two-way metal-sealed ball valve" (patent No. 99225554.6) on Janua...

Examples

Embodiment 1

[0006] Embodiment 1, a kind of double-wedge double-ball disc valve of the present invention (see Figure 1-5 ), there is a valve body, a valve seat in the flow channel in the valve body, a bracket of the valve body, a ball corresponding to the valve seat C and D in the valve body, a valve stem M connected to the ball, and the valve stem passes through the seal of the valve body Extending to the top of the valve body, the screw at the upper end of the valve stem cooperates with the handwheel nut on the valve body bracket, the side of the valve stem has an L-shaped guide groove, and the bracket is fixed with a guide pin L whose end is inserted into the guide groove; its characteristics That is: the sphere is two left and right balls A, B, the upper part and the lower part between the two balls are the open upper conical space and the lower conical space, and the upper conical space and the lower conical space correspond to the upper and lower conical spaces. The upper end of the...

Embodiment 2

[0008] A kind of double-wedge type double-ball disc valve of the present invention, see attached Figure 5, there is a valve body (14), a valve cover (11) and a gasket (26) fixedly connected by bolts (25), the valve seat (16) of the flow channel in the valve body, and the valve body fixed by bolts (9) The bracket (8), the ball (15) corresponding to the valve seat in the valve body, the valve stem connected with the ball, the valve stem passes through the sealing ring (13) of the valve body to seal the packing (12), and the packing gland (10) passes through Bolts (24) and nuts (23) are connected to the valve cover and backlogged on the packing. The screw rod at the upper end of the valve stem cooperates with the nut (5) in the middle of the handwheel (2) on the valve body support (8). The stepped shaft at the lower end of the nut (5) is in dynamic fit with the bushing (4) of the bracket, a gasket (3) is clamped between the bushing and the handwheel, and the upper end of the nu...

technical field

[0001] The invention relates to a new type of ball valve, especially a double-disc ball valve with a device for separating or pressing the sealing surfaces on both sides of the ball plug from the valve seat. A ball valve that actuates a ball plug to close or open. Background technique

[0002] At present, the ball valves (floating type, fixed type) used at home and abroad, when the ball rotates to implement the switch, the ball and the seat surface will produce sliding friction, which will cause the sealing surface to wear and scratch, which is also the main reason for the leakage and jamming of the valve seat sealing surface. . When the ball rotates under the heavy load of the pipeline medium, the sassafras and large load torque are the key technical problems to be solved urgently for the ball valve. In order to solve such problems, the Chinese utility model patent specification disclosed a "two-way metal-sealed ball valve" (patent No. 99225554.6) on Janua...

Examples

Embodiment 1

[0006] Embodiment 1, a kind of double-wedge double-ball disc valve of the present invention (see Figure 1-5 ), there is a valve body, a valve seat in the flow channel in the valve body, a bracket of the valve body, a ball corresponding to the valve seat C and D in the valve body, a valve stem M connected to the ball, and the valve stem passes through the seal of the valve body Extending to the top of the valve body, the screw at the upper end of the valve stem cooperates with the handwheel nut on the valve body bracket, the side of the valve stem has an L-shaped guide groove, and the bracket is fixed with a guide pin L whose end is inserted into the guide groove; its characteristics That is: the sphere is two left and right balls A, B, the upper part and the lower part between the two balls are the open upper conical space and the lower conical space, and the upper conical space and the lower conical space correspond to the upper and lower conical spaces. The upper end of the...

Embodiment 2

[0008] A kind of double-wedge type double-ball disc valve of the present invention, see attached Figure 5, there is a valve body (14), a valve cover (11) and a gasket (26) fixedly connected by bolts (25), the valve seat (16) of the flow channel in the valve body, and the valve body fixed by bolts (9) The bracket (8), the ball (15) corresponding to the valve seat in the valve body, the valve stem connected with the ball, the valve stem passes through the sealing ring (13) of the valve body to seal the packing (12), and the packing gland (10) passes through Bolts (24) and nuts (23) are connected to the valve cover and backlogged on the packing. The screw rod at the upper end of the valve stem cooperates with the nut (5) in the middle of the handwheel (2) on the valve body support (8). The stepped shaft at the lower end of the nut (5) is in dynamic fit with the bushing (4) of the bracket, a gasket (3) is clamped between the bushing and the handwheel, and the upper end of the nu...

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