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

Disclosed is an emergency cut-off valve of at the bottom of a built-in tank in a low-temperature liquid storage tank. The emergency cut-off valve mainly comprises a main valve portion and a driving portion, the main valve portion is welded to the bottom of the low-temperature liquid storage tank through a bottom plate; the driving portion is placed at the top of the low-temperature liquid storage tank, and the main valve portion and the driving portion are connected through two stainless steel ropes, wherein one rope is a work rope, and the other rope is an emergency rope; a valve seat is fixed on the bottom plate of the main valve portion and connected with a guide frame, and a large valve clack which is capable of vertically moving and is matched with the valve seat to form a large sealing pair is built in the guide frame; and a small valve clack which is capable of vertically moving and is matched with a centre valve hole of the large valve clack to form a small sealing pair is arranged above the large valve clack through a valve rod. Compared with ordinary emergency cut-off valves, the emergency cut-off valve is small in executing mechanism, reasonable and compact in structure and good in using effects.

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 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 provides a pilot type control valve which belongs to the field of mechanical technology and solves the problem that the existing pilot type safety valve is not applicable to a control valve. The pilot type control valve comprises a valve body, a valve core, a valve rod and a handle. The valve core is located inside the valve body and an inner end of the valve rod is connected with the valve core. An outer end of the valve rod extends out of the valve body to be connected with the handle. The valve core with a cylindrical shape is sheathed on the valve rod. The valve rod is provided with a nut and a small valve core, wherein the nut can abut against a bottom port of the valve core and the small valve core can abut against a top port of the valve core. The valve core is located between the nut and the small valve core and can move between them. There is a channel for fluid medium to pass through between the valve core and the valve rod. There is a sealing structure which can realize a seal between the small valve core and the top port of the valve core when the small valve core and the top port of the valve core contact each other. The pilot type control valve has the advantages of smooth opening, simple operationand the like.

The invention discloses an automobile seat back lock. The automobile seat back lock comprises a lock shell and a cover plate. A lock leaf and an unlocking rocker arm are arranged in the lock shell, one end of the lock leaf is rotationally connected to the lock shell, the lock leaf is provided with a torsional spring which promotes the lock leaf to swing towards the locking direction, the lock leaf is provided with a hinge pin and a lock groove, one end of the unlocking rocker arm is rotationally connected to the lock shell, and the other end of the unlocking rocker arm is movably connected with the hinge pin. An installation plate is arranged on the lock shell, the installation plate and the lock shell are arranged in an L shape, an unlocking lever is rotationally connected to the installation plate, a guide hole is formed in the lock shell, one end of the unlocking lever penetrates through the guide hole and is movably connected with the third end of the unlocking rocker arm, and the other end of the unlocking lever is connected with a pull rope. According to the automobile seat back lock, the unlocking structure is arranged on one face of the lock and can be installed in a seat, and therefore occupied space is saved; the lever principle is adopted for the unlocking lever, and therefore the unlocking force moment is greatly reduced; in addition, the lock has the early-warning function.

The invention discloses a middle cavity inner swinging type fast-starting and fast-closing gate valve. The gate valve comprises a gate valve body, a gate valve cover, a driving valve rod and a gate valve middle cavity, wherein a gate valve seat is arranged above the gate valve body, a limiting movable groove is formed in the inner side of the gate valve seat, the driving valve rod is located at the upper portion of the inner side of the gate valve cover, a movable connecting sleeve is arranged in the middle of the inner side of a rotating wheel, limiting clamping blocks are uniformly distributed at the lower end of the movable connecting sleeve, a connecting tooth groove is formed below the gate valve cover, a second movable gate is arranged on the right side of a first movable gate, and aflexible graphite sealing gasket is arranged on the side face of the second movable gate. According to the middle cavity inner swinging type fast-starting and fast-closing gate valve, the first movable gate and the second movable gate which perform synchronous parallel swing opening and closing are arranged, the device can be quickly opened and closed under the synchronous transmission of the connecting tooth groove, and meanwhile, the limiting clamping blocks of the movable connecting sleeve can be used for conveniently and flexibly limiting the device, so that the practicability of the device is improved.

The invention relates to an electric control valve which can be completely sealed off and shut off, consisting of two parts, namely an executing mechanism and a valve body being connected; 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 a valve plate and a connecting flange; seal rings of polypropylene substrate material are installed on the valve plate and the pilot valve plate; two ends of the transmission nut are additionally installed with a plane thrusting ball 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 discloses a self-adaptive bidirectional floating valve seat structure. The structure comprises a valve body; a valve seat and a spherical crown which are matched with each other are arranged in the valve body; the structure is characterized by further comprising a circular pressing plate connected on one side, close to the spherical crown, of the valve body; the valve seat is located between the pressing plate and the valve body, an axial gap exists between one side of the valve seat and the pressing plate, and an axial gap exists between the other side of the valve seat and the valve body; an axially compressed first spring is arranged between the valve seat and the valve body; an axially compressed second spring is arranged between the valve seat and the pressing plate; the valve seat floats between the valve body and the pressing plate axially; and the first spring and the second spring jointly enable the valve seat and the spherical crown to be fit in a sealed manner at the sealing surface. According to the structure, sealing pressure is applied to a sealing pair under the resultant action of the two springs, the valve seat and the springs can be adjusted in a self-adaptive manner under different working pressure, the reasonable sealing force is applied to the sealing surface, and the self-adaptive bidirectional floating effect is realized.

Disclosed is an emergency cut-off valve of at the bottom of a built-in tank in a low-temperature liquid storage tank. The emergency cut-off valve mainly comprises a main valve portion and a driving portion, the main valve portion is welded to the bottom of the low-temperature liquid storage tank through a bottom plate; the driving portion is placed at the top of the low-temperature liquid storage tank, and the main valve portion and the driving portion are connected through two stainless steel ropes, wherein one rope is a work rope, and the other rope is an emergency rope; a valve seat is fixed on the bottom plate of the main valve portion and connected with a guide frame, and a large valve clack which is capable of vertically moving and is matched with the valve seat to form a large sealing pair is built in the guide frame; and a small valve clack which is capable of vertically moving and is matched with a centre valve hole of the large valve clack to form a small sealing pair is arranged above the large valve clack through a valve rod. Compared with ordinary emergency cut-off valves, the emergency cut-off valve is small in executing mechanism, reasonable and compact in structure and good in using effects.

The invention discloses a firstly-opened adjustment valve. The firstly-opened adjustment valve comprises an execution mechanism, a valve rod, a stroke pointer, stroke scales, a medium outlet in a firstly-opened valve element, a valve body main body and a guide ring, wherein the valve rod is installed at the middle below the execution mechanism, and the stroke pointer is fixed to the left side of the valve rod; the stroke scales are formed at the left side of the stroke pointer; the execution mechanism is fixed to the left side of the stroke scales, and a support is arranged at the bottom end of the execution mechanism; the bottom end of the valve rod penetrates through the support and a gland, and is connected with a small valve element main body, and a valve body main body is fixed to thebottom end of the support; and a valve plug main body is installed in the valve body main body. The firstly-opened adjustment valve is provided with a cross-shaped small valve element, and the smallvalve element adopts a firstly-opened structure, and is low in opening torque compared with a traditional sleeve structure; and when the valve is opened, a pressure charge-in valve in the central cavity of the small valve element main body is opened at first, and then the upper pressure and the lower pressure of the valve plug main body are balanced, and at this moment, the valve plug main body isopened, and the torque is reduced.

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 a high-safety die forging ball valve. The high-safety die forging ball valve comprises a valve body, wherein a valve ball loading port is formed in the upper end of a valve cavity of the valve body, a valve ball is arranged inside the valve cavity, a first inclined plane combined type valve base is arranged at the left end of the valve ball, and a second inclined plane combined valve base is arranged at the right end of the valve ball; a positioning boss is arranged at the upper end of the valve ball, a positioning groove is vertically formed in the middle of the positioning boss, a sliding block is arranged on the positioning boss, a positioning lug is integrally arranged on the lower end surface of the sliding block, and the positioning lug is inserted into the positioning groove; a spring groove is vertically formed in the middle of the upper end surface of the sliding block, a spring assembly is arranged inside the spring groove in a embedded mode, a valve rod is arranged right above the spring assembly, and a valve cover is arranged on the valve rod in a sleeved mode. According to the technical scheme, the structure design is reasonable, the structure is simple, the high-safety die forging ball valve is not easy to leakage, the sealing performance is good, the valve rod is not easy to bend or deform, the valve opening and closing torque is small, the maintenance is convenient, the service life is long, the work is stable, and the practicability is good.

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.