33results about How to "Small switching torque" patented technology

The invention relates to an ultra-low temperature plate valve which comprises a valve body, a lengthened valve cap, a valve rod, a valve plate, a valve base, a bracket, a handwheel and a direction rod, wherein a cavity channel serving as a medium flow passage is formed coaxially and horizontally inside the valve body; the lengthened valve cap is fixedly mounted at the vertical upper end of the valve body coaxially; the valve rod is mounted in the middle of the valve body vertically; the valve plate is coaxially and fixedly mounted at the lower end of the valve rod inside the valve body; the handwheel is coaxially mounted on the valve rod of which the upper end extends out of the upper end of the lengthened valve cap; compression springs are mounted the on the contact surface of the outer circumference of the valve seat and the valve body; a low-temperature-resistant energy-storage seal ring is mounted on the convex shoulder contact surface between the valve seat and the valve body. The ultra-low temperature plate valve solves the technical problems of sealing and heavy on / off torque under the condition of ultra-low temperature and high-pressure medium; the plate valve is scientific in design, simple in structure, high in working pressure, reliable in sealing property, light in on / off torque, and long in service life, so as to be widely applied to various working conditions of ultra-high pressure and ultra-low temperature.

The invention discloses a full-lining bidirectional composite soft sealing butterfly valve, which belongs to a butterfly valve for a pipeline of fresh water, gas and the like in large water supply and drainage engineering and seawater and sewage treatment. The butterfly valve comprises a valve body, a valve seat arranged on the valve body, a valve plate rotating around a valve shaft, a valve shaft connected with the valve plate, a connection seat, a gland, a bushing, a seal ring and a rear end cover arranged on the bottom part of the valve body, wherein the connection seat, the gland, the bushing and the seal ring are arranged on the upper part of the valve body, thevalve shaft is connected with the valve plate by an upper valve shaft (4) and a lower valve shaft (9) through a square or flat head; the valve plate (2) is an inclined plate spherical surface; the valve seat (3) is directly vulcanized on the valve body (1) in a composite eccentric bevel sealing mode and completely covers the valve body (1); the upper and lower supports of the valve body (1) are sealed by an O-shaped seal ring (8); the O-shaped seal ring (8) is compacted by a packing gland (6) and the bushing (7); and the bushing (7) is installed in the upper and lower supports of the valve body (1). The invention has the advantages of capability of avoiding locking or over-closing, corrosion resistance, long service life, high sealing performance and the like.

This invention provides a dual-sealing valve, which is used under the condition that the controlled liquid is flowed in double-way, and can realize opening function under less opening power. The dual-sealing valve includes valve body with in-outlet, and two sealing elements disposed in a valve cavity which is in the valve body and matched with the inlet and the outlet. A linkage synchronization unit is disposed between the two sealing elements, and a pressure relieving device is connected between the valve cavity and the in-outlet. The valve reduces not only the opening-closing moment greatly, but also the volume of the outside operation device and the requirement of the power source, thus the operation speed of the valve and the service life of the valve are improved. Moreover, the valve has realized self-dual-sealing in double-way, and achieved no damage rapid switch by the linkage synchronization unit. Thus the reliability of the inside operation of the valve is improved, and the cost of the valve is reduced. This invention applies especially in the environment of large flux and high pressure, which requires good sealing performance, intrinsically safe, and frequently rapid switch.

The invention discloses a cast three-piece symmetrical floating-ball elastic-seal duplex switchable filter in the field of industrial pipeline medium circulation and filtration. According to the switchable filter, three-piece type connection is adopted in a case, so that a control chamber and two filtration chambers are formed. An upper rotating shaft, a lower rotating shaft, an upper three-way ball, a lower three-way ball and a plurality of elastic seal pair combinations are arranged in the control chamber, wherein the elastic seal pair combinations ensure the seal connection between the upper three-way ball and the lower three-way ball and inlets or outlets of the filtration chambers. According to the switchable filter, the technical problems that the assembly sealing property of an existing integrally-cast case and a two-piece cast connection type case is poor, switching torque of a handle is large and switching is difficult are solved. As the upper three-way ball and the lower three-way ball in the structure are matched with elastic seal pairs composed of seal rings and elastic seal rings of the corresponding structural design, the compression amount can be measured, and the elasticity can be controlled. Moreover, a certain pre-tightening force is possessed under low pressure after a main case and an auxiliary case are combined, the sealing property is good, and the torque for switching the handle is small when the switchable filter works under the environment of high-pressure media.

The invention discloses an anti-oil-leakage valve used for a power transformer oil tank. The anti-oil-leakage valve mainly comprises an upper valve rod, a butterfly plate and a lower valve rod, wherein the upper valve rod, the butterfly plate and the lower valve rod are sequentially connected. Flexible adjustment rings are fixed to the inner side of the upper end surface of the butterfly plate and the inner side of the lower end surface of the butterfly plate respectively, the upper valve rod is sleeved with an upper adjustment bearing, the lower valve rod is sleeved with a lower adjustment bearing, the upper adjustment bearing is sleeved with an upper adjustment ring, the lower adjustment bearing is sleeved with a lower adjustment ring and an inner tightening ring from inside to outside in sequence, the lower portion of the inner tightening ring is connected with a valve body through a bolt, and the valve body is sleeved with the upper adjustment ring. According to the anti-oil-leakage valve used for the power transformer oil tank, because the upper adjustment bearing and the lower adjustment bearing are adopted, friction resistance applied to the valve rods can be reduced, sealing conditions of the upper and lower end surfaces of the butterfly plate can be easily changed, and the sealing performance of the valve is improved. An O-shaped ring is installed in the inner tightening ring in the form of a groove, and therefore the opening or closing torque of the valve can be reduced; because the flexible adjustment rings and rigid adjustment rings are arranged on the upper end surface of the butterfly plate as well as the lower end surface of the butterfly plate, the opening or closing torque can be reduced, deformation is avoided, and a good oil leakage preventing effect is achieved.

The invention discloses a lip-shaped sealing ring and a plug valve thereof and belongs to the technical field of drilling devices. The lip-shaped sealing ring comprises an annular sealing ring body. The lips of the lip-shaped sealing ring are located on the two side faces of the sealing ring body, and a lip opening facing the external diameter of the sealing body is formed between the two lips; the plug valve comprises a lower valve seat, an upper valve seat, a valve core and a valve rod which are assembled in a valve body in a matched mode, a first sealing piece is arranged between the lower valve seat and the valve body, and a second sealing piece is arranged between the valve rod and the valve body; and a third sealing piece is arranged between the upper valve seat and the valve body, and the first sealing piece is the lip-shaped sealing ring and arranged between the end surface of the lower valve seat and the end surface of the valve body. According to the lip-shaped sealing ring, sealing between panels can be achieved, the plug valve is simple in structure, and the problem that drilling operation is influenced by the condition that a traditional square drilling rod plug valve is large in opening difficulty under the high pressure is solved, a low-torque plug valve opened through a single person under the 70 MPa differential pressure can be achieved, and the requirements for markets and production sites are well met.

The invention discloses a non-excitation tap changer with a wedge-shaped contact structure, which includes upper and lower support seats, and a main shaft is installed between the upper and lower support seats. One end of the main shaft is connected with the operating mechanism, and the main shaft is connected with a The gear mechanism, the output end of the gear mechanism is connected with the sheave mechanism, the sheave of the sheave mechanism is sleeved on the main shaft and connected with the movable contact bracket, and the movable contact bracket is provided with a movable contact slidingly connected with it. The contact assembly, the circumferential direction of the movable contact assembly is correspondingly equipped with a static contact column configured with it, and the feature is that: the main shaft is provided with a crank, and the crank is connected to the movable contact assembly of the movable contact assembly through the connecting rod of the crank mechanism. The contact supports are connected so that the moving contact assembly can not only rotate intermittently with the sheave mechanism, but also perform radial sliding and telescopic movement with the crank mechanism. When shifting gears, the moving contact does not rub against the static contact column, so that the shift torque of the switch is small, and the plating layer of the protection contact is not damaged, and the metal powder generated by the contact friction is prevented from polluting the transformer oil.

The invention discloses a processing method of an eccentric sphere embedded plastic ball valve and a product thereof. The eccentric sphere embedded plastic ball valve comprises an eccentric sphere, a valve body and a driving mechanism and the invention provides a processing method thereof, wherein the driving mechanism drives the sphere to rotate. The eccentric sphere of the valve and the valve seat can be embedded in a die, and the valve body are integrally cast and shaped. The integral strength of the valve manufactured by the invention is higher than that of the valve body manufactured by the prior art, and the valve body stress is evenly distributed to lighten creep generated by stress concentration so as to greatly improve the durability of the ball valve. The ball valve has good sealing property, is easy to switch on and off, has accurate position, reduces processing steps, saves consumables and has obvious quality meaning and economic benefit.

A six-way switching ball valve belongs to the switching valve, which solves the problem that the inlet and outlet of the existing six-way switching valve are all arranged on the same side, resulting in limited application occasions. The present invention consists of an upper three-way ball valve, a lower three-way ball valve and a drive conversion mechanism. The structure and components of the upper three-way ball valve and the lower three-way ball valve are exactly the same. Rotary shaft, thrust ring, flange gland, rotating block, steel wire retaining ring; the drive conversion mechanism includes handle, bevel gear, gearbox, input shaft, ball bearing, upper output shaft, lower output shaft, drive conversion The upper and lower output shafts of the mechanism are matched and connected with the rotating shafts of the upper and lower three-way ball valves respectively. The invention has the advantages of simple structure, small switching torque, different side arrangement of the inlet and outlet, and solves the problem of limited application occasions of the arrangement of the same side of the inlet and outlet. Strong performance, making the on-site pipeline layout more flexible.

The invention discloses a PDS ball valve comprising a valve body, a ball core and a valve seat. The valve seat is elastically and tightly pressed to the spherical face of the ball core. A guide component is arranged at the back end of the valve seat and located on the side far away from the ball core, wherein the guide component exerts pretightening force on the valve seat to tightly press the valve seat to the spherical face of the ball core. The guide component provides initial pretightening force for the valve seat and transmits medium pressure to the valve seat. The PDS ball valve can be used for preventing solid particles in the medium from entering a spring cavity, and the medium pressure does not compress the spring in the use process; and meanwhile, the pressure bearing area at thetail end of the valve seat is reduced, so that the push force for the valve seat to be tightly pressed to the spherical surface of the ball core is reduced, the friction force between the valve seatand the spherical surface of the ball core is reduced, the seal performance of the valve is guaranteed, the opening and closing torque of the valve is reduced, and the service life of the valve is prolonged.