32results about How to "Small opening torque" patented technology

The invention discloses a fast opening and closing gate valve with pendulum in the middle chamber, which comprises a gate valve body, a gate valve cover, a driving valve rod and a gate valve middle chamber. The drive valve rod runs through the gate valve cover, the middle part of the inside of the runner is provided with a movable connection sleeve, the lower end of the movable connection sleeve is evenly distributed with limited blocks, and the lower part of the gate valve cover is provided with Connecting the tooth groove, the right side of the first movable shutter is provided with a second movable shutter, and the side of the second movable shutter is provided with a flexible graphite sealing gasket. The pendulum-type fast opening and closing gate valve in the middle cavity is equipped with a first movable gate and a second movable gate for synchronous parallel swing opening and closing. The limit block of the movable connection sleeve can facilitate the flexible limit of the device and improve the practicability of the device.

The invention relates to a turn-off type power failure restoration electric valve which is formed by the connection of an executing mechanism and a valve body; a drive motor, a transmission nut, a transmission screw, a coupling and a valve shaft are connected in sequence for transmission; a position signal feedback device, an analog quantity controller and a power failure restoration device are also installed in the executing mechanism; a pilot valve plate and a spool spring are installed in the middle of an upper valve plate and a lower valve plate; seal rings of polypropylene substrate material are installed on the valve plates; two ends of the transmission nut are additionally installed with a bearing; a butterfly spring is installed in the coupling. The valve has no leakage and can automatically restore when the power fails, thus saving energy and reducing consumption; the valve has easy and labor-saving opening and closing, advanced technology and excellent performance.

The invention relates to a pilot plant sluice valve. The pilot plant sluice valve is characterized by comprising a pair of valve seats, a flashboard, a valve rod and an auxiliary flashboard; a pressure releasing hole A communicating a flow channel liquid feeding side and the cavity of a valve body is formed in the liquid feeding side of the valve seats; an auxiliary flashboard accommodating groove is formed at the center of a T-shaped groove at the top of the flashboard, and a pressure releasing hole C is formed in a sealing face B of the liquid discharging side of the side of the auxiliary flashboard accommodating groove; the lower end of the valve rod can move for a certain distance in the T-shaped groove; the auxiliary flashboard is mounted at the lower end of the valve rod and is embedded into the auxiliary flashboard accommodating groove, and is provided with a sealing face C, a pressure releasing hole B and a pressure releasing hole D. The pilot plant sluice valve has the advantages that when the valve is opened and closed, the initial valve rod is utilized to drive the auxiliary flashboard to move so as to allow the pressure releasing holes A, B, C and D to form a pressure releasing channel, the pressures on the liquid feeding side and the liquid discharging side are balanced, the opening torque is reduced accordingly, wearing caused by sealing face friction increasing is avoided, and service life is prolonged.

The invention discloses a valve oil film sealing structure. The valve oil film sealing structure comprises a valve seat arranged on a valve body and a valve element surface arranged in the valve body and corresponding to the valve seat. A gap is reserved between the valve seat and the valve element surface and is filled with sealing paste. The sealing paste is located between the valve seat and the valve element surface to form an oil-film-shaped sealing face. The end face, facing the valve element surface, of the valve seat is provided with a storage groove filled with the sealing paste. The valve seat is provided with a feeding channel, the inlet end of the feeding channel extends to the position of a sealing paste feeding port of the valve body, and the outlet end of the feeding channel communicates with the storage groove. The valve oil film sealing structure has the beneficial effects of being good in closing performance, resistant to abrasion, stable in performance and long in service life.

The invention relates to a low friction flat gate valve which comprises a valve body, a valve cap, valve seats, a flashboard, a valve rod and a hand wheel, wherein a pair of the valve seats is fixedly mounted inside the valve body in a coaxial and hermetic manner; the flashboard is mounted between the valve seats in the vertical direction in a sliding and guiding manner; the valve rod is fixedly mounted at the upper end of the flashboard in the vertical direction in a coaxial manner; the upper part of the valve rod extends out of the valve cap; the hand wheel is mounted at the upper part, positioned at the upper part of the valve cap, of the valve rod in a coaxial manner; combined filling material is mounted on the valve cap inner side between the valve rod and the valve cap; a spring hole is formed in one of the valve seat at the axial contact position with the valve body; a spring is mounted inside the spring hole in a propping manner; a wedge boss is arranged on the surface, in contact with the flashboard, of the valve seat; a guide bevel step is manufactured on the flashboard at the position corresponding to the wedge boss. According to the flat gate valve, the abrasion of the hermetic surfaces of the valve seats and the removal torque of the valve are effectively reduced, and the service life of the valve is greatly prolonged.

The invention discloses an openable kelly cock valve with a high pressure difference, which relates to petroleum machinery. The openable kelly cock valve comprises a valve body (1), a knob (2) and a valve ball (3), wherein the valve ball (3) is fixed in the valve body (1) by an upper valve seat (4) and a lower valve seat (5); the lower valve seat (5) is sleeved with a wave spring (6); an annular sealing portion (7) is arranged on the upper valve seat (4) and the lower valve seat (5) respectively and in contact with the valve ball (3) by an inner-side corner; the lower valve seat (5) and the annular sealing portion (7) thereof are of a split structure and in threaded connection; the wave spring (6) is abutted against the outer-side end of the annular sealing portion (7) of the lower valve seat (5). The openable kelly cock valve has the advantages of being simple in structure, reliable in sealing, and low in opening torque; manual opening is realized in case of building a pressure of 35MPa in a drilling tool, and manual rapid closing in case of a vertical tube pressure below 35MPa during overflow and well kick can be realized; the reliability of a blowout prevention operation in a wellhead and the safety of wellhead operations are improved.

The invention relates to an electric valve with a shock absorption protection function and small torsion, which consists of two parts that are connected, namely, an actuating mechanism and a valve main body. A driving motor, a transmission nut, a transmission screw, a coupling and a valve shaft are in connection and transmission in sequence; the actuating mechanism is also internally provided with a position signal feedback device, an analog control device and an outage reduction device; the middle of a valve plate is provided with a pilot valve plate and a valve core spring, and the valve plate is provided with a sealing ring using polypropylene as base material; the two ends of the transmission nut are provided with a plane thrust ball bearing and a disc spring is arranged in the coupling. The valve has no leakage, can carry out automatic reduction in case of outage and reduce consumption, and is energy-saving, labor-saving and easy to open and close with advanced technology and excellent performance.