4results about How to "Reduce operating torque" patented technology

The invention discloses a high-sealing-performance eccentric semi-ball valve and a method thereof, and belongs to the technical field of valves. The high-sealing-performance eccentric semi-ball valve comprises a valve body and a semi-ball valve element; a valve seat is arranged on one side of a liquid outlet of the valve body, and a spherical crown used for abutting against the valve seat to achieve the sealing effect on the valve body is arranged on the outer edge of the valve body. A multi-stage sealing mechanism used for avoiding leakage at the dynamic sealing position of the upper valve rod is arranged between the upper valve rod and the upper flange. A soft and hard double-sealing mechanism is arranged between the spherical crown and the valve seat; the soft and hard double-sealing mechanism comprises a main sealing ring and a self-cleaning type elastic hard sealing assembly, and a low-torque rotating mechanism capable of effectively reducing the torque of the upper valve rod and the torque of the lower valve rod is arranged between the lower valve rod and the lower flange. By means of the mode, an elastic pair sealing structure between the spherical crown and the valve seat is achieved through cooperation of the spring and the floating type anti-falling pin, sealing is more facilitated, the elastic pre-tightening function of the valve seat is achieved through the spring, the valve seat has the load compensation function all the time, and the reliable sealing condition is met.

The invention provides an efficient continuous oily sludge pyrolysis device and method, the efficient continuous oily sludge pyrolysis device comprises a pyrolysis assembly (10), and the pyrolysis assembly (10) comprises a first-stage pyrolysis reactor (100), a second-stage pyrolysis reactor (101) and a third-stage pyrolysis reactor (102) which are sequentially communicated from top to bottom. By introducing the continuous pyrolysis design, the downtime is shortened, the treatment efficiency of the oily sludge is remarkably improved, and the requirement for large-scale oily sludge treatment is met; the design of bottom combustion gas heating and top feeding is adopted for the pyrolysis reactor, so that a high-low temperature area is effectively formed, the pyrolysis temperature gradient is enhanced, rapid decomposition of the oily sludge is promoted, the heat utilization rate is increased, and the heat loss is reduced.

This invention discloses a pressure-balanced composite sealing ball valve, comprising a valve body, a valve stem, a valve core, and a composite sealing structure. The valve body has a fluid channel and a first mounting hole, which communicates with the fluid channel. At least a portion of the valve stem is connected to the interior of the first mounting hole, and the valve stem can be driven to rotate. The valve core is disposed inside the valve body and is movably fitted with the valve stem. The valve stem has a balance hole, and the valve core has a guide hole, which communicates with the guide hole. The composite sealing structure is fitted around the outer circumference of the valve stem and is sealed to the inner wall of the first mounting hole. When the fluid channel is open, fluid enters the first mounting hole, contacts and forces the composite sealing structure to deform axially on the valve stem. This ball valve employs a composite sealing structure, ensuring a good seal between the valve stem and valve body even under high pressure, high-frequency operation, or the penetration of small molecule media. Simultaneously, the balance hole on the valve stem reduces the operating torque of the valve stem.

The utility model relates to the technical field of plug valves, and discloses a spring auxiliary sealing structure of a pressure balance type plug valve, which comprises a valve body, and a plug grease injection device is arranged on the valve body; the plug grease injection device comprises an injection valve, the injection valve is arranged at the top of a valve body, the left side of the injection valve is fixedly connected with an injection check valve, a screw fixedly penetrates through the top of the valve body, the bottom of the screw is fixedly connected with a gasket, a valve rod is arranged at the top of the valve body, and a thrust bearing is arranged at the bottom of the valve rod. A spring is fixedly connected to the bottom of the thrust bearing, a flat key is fixedly connected to the front face of the valve rod, a plug cock is fixedly connected to the bottom of the valve rod, sealing grease is injected into the valve body by rotating the injection valve, a balance ring is designed between the plug cock and the valve rod, and the balance ring slightly slides between the valve rod and the plug cock in the valve opening and closing process. And the axes of the valve rod and the plug cock are aligned, so that the operating force is better transmitted, the operating torque is reduced, and the plug cock and the valve body are more tightly sealed.