4results about How to "High work pressure" patented technology

According to the rotary thrust plate system and the hydraulic axial variable plunger pump, a rotary thrust plate with rollers is arranged between a sliding shoe and a variable swash plate, and sliding friction between the sliding shoe and the variable swash plate is converted into rolling friction. The sliding shoe is fixed on the thrust plate to eliminate relative motion; and the conical self-aligning raceway on the swash plate is matched with the roller. An isolation type lubrication packaging structure is adopted, the problem that a sliding shoe is prone to abrasion and ablation is fundamentally solved, the working service life of the pump is prolonged, the reliability of the pump is improved, and the maintenance cost is reduced.

The application discloses a compressed natural gas bottle valve for vehicle, which comprises a valve body, a safety device and an opening and closing device. The valve body comprises an air inlet end and an air outlet, the air inlet end is suitable for being connected to a gas bottle, the air inlet end is provided with a first air inlet channel and a second air inlet channel, the second air inlet channel is communicated with the air outlet; the safety device is sealedly connected to the outlet end of the first air inlet channel, when the pressure in the gas bottle is higher than a first set value or the ambient temperature is higher than a second set value, the safety device opens the outlet end of the first air inlet channel to release pressure; the opening and closing device comprises a flow limiting valve, a sealing mechanism and an adjusting mechanism, the flow limiting valve is arranged at the second air inlet channel, the flow limiting valve limits the gas flow within a third set value, and the sealing mechanism comprises a valve rod and a sealing element arranged on the valve rod. The application can improve the endurance mileage of the natural gas vehicle, and through the cooperation of the adjusting mechanism and the flow limiting valve, a lower gas flow can be limited without replacing the original flow limiting valve, and the gas flow can be linearly adjusted, thereby increasing the practicability.

The utility model provides a novel valve body assembly and a plunger pump for oil and gas field fracturing construction, relates to the technical field of oil and gas field hydraulic fracturing equipment, and solves the technical problems that a valve body assembly is short in service life and needs to be replaced frequently. The novel valve body assembly comprises a valve body and a rubber piece, the valve body comprises a matching part used for making contact with a valve seat, a clamping groove is formed in the matching part, and the rubber piece is arranged in the clamping groove in a sleeved mode; the numerical range of the contact area of the rubber piece and the valve seat to the contact area of the matching part and the valve seat is 1 / 3-1; or the numerical value range of the contact area of the matching part and the valve seat to the contact area of the rubber piece and the valve seat is 1 / 3-1; by changing the proportion of the contact surfaces of the valve body, the valve rubber and the valve seat in the valve body assembly, high working pressure and collision frequency can be adapted, and meanwhile, the service life of the valve body assembly can be prolonged. The novel valve body assembly is suitable for plunger pumps for fracturing construction of oil and gas fields.

The invention belongs to the technical field of pipes, particularly relates to an embedded type internal anti-corrosion spiral ribbed steel pipe, and aims to solve the problems that an existing steel-plastic composite pipeline is prone to layering and falling off, poor in anti-corrosion performance and poor in structural strength, and adopts a layered composite structure of a carbon steel metal structural layer, a bonding layer and a polyolefin anti-corrosion layer. After the carbon steel metal structure layer is subjected to surface optimization treatment, reinforcing ribs are spirally wound on the outer wall, an embedded spiral structure rib belt is arranged on the inner wall, an elastic additive buffer layer is added to a bonding layer, a polyolefin anti-corrosion layer is made of a modified polyolefin material, meanwhile, multiple reliable connection modes are matched, and machining parameters are accurately controlled through a specific production technology. The effects of strong combination, low stress and stripping resistance of a steel-plastic interface can be achieved, the structural strength, corrosion resistance durability and installation adaptability of the pipeline are improved, and the steel-plastic composite pipe is suitable for various scenes such as high-pressure conveying and complex working conditions.