1342results about "Spindle sealings" patented technology

The invention relates to the technical field of industrial automation and control, and discloses a top-mounted high-temperature-resistant hard sealing ball valve and a self-adaptive dynamic control system of the top-mounted high-temperature-resistant hard sealing ball valve. The system aims at solving the technical problem that due to the fact that fixed driving torque is adopted, the sealing face of the valve is excessively abraded or the risk of heat jamming exists. The system is characterized by comprising a multi-point distributed sensing subsystem, a valve dynamic control unit and an intelligent electric actuating mechanism. A hybrid torque prediction model based on physical information and data driving is arranged in the valve dynamic control unit, the optimal torque is predicted in real time through sensing data, an executing mechanism is driven to respond dynamically, and the valve dynamic control unit has the online self-learning capacity. Accurate prediction and dynamic adjustment of the valve operation torque can be achieved, overstress damage is effectively avoided, the self-adaptability and generalization ability of the system are improved, and the service life of the valve is prolonged.

The low-temperature ball valve comprises a valve body, a valve cavity is formed in the middle of the valve body, auxiliary sealing rings are arranged on the inner sides of the two ends of the valve body, a left valve deck and a right valve deck are detachably installed on the inner sides of the two ends of the valve body through bolts correspondingly, and valve seats are detachably installed on the outer sides of the two ends of the valve body through bolts correspondingly; a valve ball is rotationally connected to the inner wall of the valve cavity, a main sealing ring is arranged at the upper end of the valve ball, a valve rod is fixed to the middle of the upper end of the valve ball, sealing filler is arranged between the valve rod and the valve body, and a handle is detachably installed at the upper end of the valve rod through a bolt. According to the low-temperature ball valve, a worker rotates the handle to conduct rotating operation, on one hand, the supporting and sealing effects are achieved, the overall sealing performance of the low-temperature ball valve is improved, on the other hand, the automatic cleaning effect is achieved, the service life of the low-temperature ball valve is prolonged, on the other hand, the stress balance effect is achieved, and the using stability of the low-temperature ball valve is improved.

The invention relates to the technical field of valves, in particular to a high-temperature material flow adjusting device and a control method thereof.The high-temperature material flow adjusting device comprises a device body, a spring hanging bracket fixed to the device body, a water inlet and return system, a control system, a monitoring device and a connecting pipe fixed to a discharging port of the device body. By means of the curved surface fitting design of the valve head and the valve seat, linear adjustment of the high-temperature material flow is achieved, the defects that small opening is sensitive and large opening is slow are thoroughly overcome, the micro-adjustment requirement is accurately met, material level and temperature signals are collected in real time through a monitoring device, closed-loop control is constructed through a PLC control system, and the control precision of the high-temperature material flow is greatly improved. The electric actuating mechanism is automatically driven to adjust the position of the valve rod, manual intervention is not needed, manual judgment errors are avoided, potential safety hazards of operation in a high-temperature scene are eliminated, flow control accuracy and stability are greatly improved, and the problem that a traditional control loop is unstable is solved.

The invention relates to the technical field of valves, discloses a dry shaft type two-way sealing high-performance butterfly valve and aims to solve the problems that in the prior art, a valve rod is corroded and abraded, high-temperature and high-pressure sealing fails, and traditional dry shaft isolation is fragile. The three-eccentric butterfly valve is characterized by comprising a three-eccentric butterfly plate, an elastic metal valve seat and a main shaft isolation assembly. The elastic metal valve seat is composed of a corrugated spring ring and a stainless steel / flexible graphite composite sealing layer, and bidirectional zero leakage is achieved. The dry shaft isolation assembly comprises an isolation sleeve, an inner side dynamic sealing piece, a bearing assembly and a medium blocking cavity, and complete isolation of the valve rod and a medium is achieved. By the adoption of the technical scheme, long-term reliable dry shaft isolation and excellent two-way zero-leakage sealing performance can be achieved, and the maintenance cost is reduced.

The utility model relates to the field of control valves, and discloses a chilling water pump inlet and outlet sliding plate valve which comprises a valve body, an outer hexagonal plug is in threaded connection with the interior of the valve body, a valve rod is arranged in the valve body, a sliding sleeve is fixedly connected to the side wall of the valve rod, a valve plate is fixedly connected to the side wall of the sliding sleeve, and a cleaning assembly is arranged in the valve body. An upper valve seat is fixedly connected to the side wall of the valve body, a lower valve seat is fixedly connected to the side wall of the valve body, a sealing ring is arranged in the valve body, and the side wall of the sealing ring is fixedly connected between the upper valve seat and the lower valve seat. Attachments generated when the valve plate is opened and closed are scraped through a scraper structure in the valve seat, sealing and dust prevention of the spring cavity are achieved by adding an O-shaped pattern in a spring framework, the lower valve cover at the bottom of the valve body is convenient to maintain, a furnace can be directly opened for overhauling, manual cleaning can be achieved, and an outer hexagonal plug is opened in the operation process and high-pressure clear water is used for online cleaning. And the middle cavity is kept clean.

The invention relates to a sealing arrangement (100) for a control valve (200), comprising a packing (140), a compression element (110), an abutment (120) and a spring force mechanism (130), the spring force mechanism (130) being designed to apply a spring force to the abutment (120), and the abutment (120) being designed to transmit the spring force to the compression element (110). The sealing arrangement (100) according to the invention is characterised in that the compression element (110) comprises a threaded bush (111) and a thrust piece (114), the threaded bush (111) having an external thread (112) designed to engage in an internal thread (212) of the control valve (200) in order to apply a pretensioning force to the packing (140), and the thrust piece (114) being arranged axially movably in an axial bore (113) of the threaded bush (111) and being designed to apply the spring force to the packing (140). The invention also relates to a corresponding control valve (100).

The invention discloses a double-support rotary full-bore throttle valve and a station switching method. Through the core assembly composed of the actuator, the valve rod, the rotary valve element, the double-end bearing supports and the like, a stress model is optimized into a stable simply supported beam structure from a traditional cantilever beam structure, vibration caused by fluid impact is remarkably restrained, and the operation stability of the whole machine is enhanced. The rotary valve core is integrated with a variable-cross-section throttling molded surface, a large-diameter full-bore flow channel and a cut-off molded surface, so that the equipment not only can realize continuous adjustment of flow and pressure, but also can perform on-line blockage removal and pollution discharge by rotating and switching to a full-bore state under the condition of not closing an upstream valve and a downstream valve, and the maintenance process is greatly simplified. In addition, according to the design, the axial telescopic space is omitted through the rotary motion principle, a valve element sleeve protection structure is omitted through high stability, the equipment size and material consumption are effectively reduced, and the beneficial effects of being high in function integration degree, high in erosion resistance, long in service life and the like are achieved.

The utility model relates to a regulating valve for an ultrahigh-pressure polyethylene device, which comprises a filler assembly, a main sealing filler group, an inner auxiliary sealing filler group and an outer auxiliary sealing filler group, the main sealing packing set is provided with inverted-V-shaped supporting rings and PTFE sealing rings which are alternately arranged. A first cavity is formed between the supporting ring and the teflon sealing ring; the inner auxiliary sealing packing group is provided with a C-shaped ring with a downward opening; the outer auxiliary sealing filler set is provided with an upper filler, a plurality of middle fillers which are overlapped and are in an inverted V shape are arranged between the lower filler and the upper filler, and a second cavity is formed between the middle fillers. When the main sealing filler is extruded by a high-pressure medium, the inner wall face and the outer wall face of the teflon sealing ring are opened outwards, and the inclined faces are fully extruded to achieve ultrahigh-pressure environment sealing.

The utility model discloses a top-mounted high-temperature ball valve capable of being disassembled and assembled on line, belongs to the technical field of valves, and aims to solve the problem that an existing ball valve cannot meet the requirements of on-line disassembly and assembly and high-temperature reliable sealing at the same time. Comprising a valve body and valve seats, spring seats and valve seats are arranged in a medium inlet and a medium outlet in a sliding mode, the valve seats and the spring seats are matched in an inserted connection mode, the spring seats are sleeved with disc spring assemblies, the valve seats are sleeved with first graphite sealing rings, and one ends of the disc spring assemblies abut against the shaft shoulder end faces of the spring seats. The valve seats are in sliding seal with the medium inlet or the medium outlet through a first graphite sealing ring, a ball is arranged between the two valve seats, the lower end of the valve rod is matched with the ball in an inserted connection mode, and the upper end of the valve rod is in rotating seal with the valve deck through a second graphite sealing ring. The utility model can realize on-line disassembly and maintenance, and can be used under high-temperature working conditions at the same time.

The invention relates to an electric servo regulating valve and a control method thereof, and belongs to the technical field of fluid control. Comprising a servo motor, a precise planetary reducer, an electric cylinder, a valve frame and an adjusting valve body which are sequentially connected. An absolute encoder is arranged in the servo motor; a ball screw transmission part is integrated in the electric cylinder, the adjusting valve body comprises a valve rod, a valve cover and a valve body, the ball screw transmission part is connected with the precise planetary reducer and the valve rod, and the precise planetary reducer drives the valve rod to do linear motion through a ball screw when rotating, so that the opening degree of the valve is controlled. The servo control driver is used for driving a servo motor and is electrically connected with the main control PLC and the absolute encoder respectively, and the rotation of the servo motor is controlled through the detected motor position and motor speed. The problems that a traditional electric control valve is low in action speed, large in system inertia, low in control precision and the like are solved.

The invention belongs to the technical field of cut-off valves, and particularly relates to an earthquake cut-off valve which comprises a valve body, a valve core, a valve core, a valve core, a valve core and a valve core. The valve clack is arranged in the valve body, is perpendicular to the cut-off opening and can block or open the cut-off opening; the valve cover is arranged at the upper end of the valve body, and a through rod hole is formed in the valve cover; the clack driving mechanism is arranged on the valve cover and can change the position of the valve clack, so that the open-close opening is blocked or opened; wherein the clack driving mechanism comprises a valve rod, a valve rod, a piston rod, a piston rod, a piston rod, a piston rod and a piston rod, the flap driving assembly is matched with the valve rod; the clack driving assembly enables the valve rod to drive the valve clack to be located above the on-off opening in the normal state, so that the on-off opening is opened, and the flowing channel is communicated. When the clack driving assembly vibrates violently, the valve rod drives the valve clack to block the on-off opening so that the flowing channel can be disconnected.

The invention provides a pilot operated safety valve with a double-corrugated-pipe sealing structure and a runner system.The pilot operated safety valve comprises a main valve body, a pilot valve and a corrugated pipe assembly, the main valve body is provided with a main cavity, and the main cavity is provided with a main valve inlet and a main valve outlet; the corrugated pipe assembly comprises a connecting seat, a first corrugated pipe, a second corrugated pipe and a valve seat, the connecting seat is connected with the main valve body, the first corrugated pipe is arranged on the outer side of the second corrugated pipe in a sleeving mode, and the two ends of the first corrugated pipe and the two ends of the second corrugated pipe are correspondingly connected with the connecting seat and the valve seat to define an adjusting cavity; and the connecting seat is provided with a connecting flow channel for communicating the adjusting cavity with the first outlet of the pilot valve. The valve seat is movable within the main chamber to open and close the main valve inlet and outlet. When the main valve inlet pressure is larger than the adjusting cavity pressure, the two corrugated pipes drive the valve seat to move so as to communicate the main valve inlet with the main valve outlet. The axial sealing performance is improved, opening and closing of the safety valve are adjusted and controlled, and the stability of the safety valve is improved.

The utility model provides a gate valve with a flexible sheath, which comprises a valve body, a valve rod arranged on the valve body, and a rotating hand wheel arranged on the valve body and connected with the valve rod, the protection column is vertically arranged on the upper end face of the rotating hand wheel and located on the peripheral side of the valve rod; the clearance opening hole is formed in the protection column and used for allowing the valve rod to be in clearance fit with the protection column; the abutting block is arranged on the protection column in a lifting mode and located in the clearance opening hole; the compression spring is arranged between the upper end of the abutting block and the protection column and located in the gap open hole, and the prompting device is arranged between the upper end of the abutting block and the protection column and used for ascending and descending along with a valve rod.

The application discloses a new energy special filtering type corrugated pipe stop valve, and aims to solve the problem of poor sealing effect between a valve core and a valve seat in the prior art. The application solves the above technical problem through the following technical scheme: comprising a valve body and a valve cover, the valve body and the valve cover cooperate to form a cavity, the two sides of the valve body are respectively provided with a water inlet channel and a water outlet channel which are communicated with the cavity, the water inlet channel is connected with an inclined blowdown channel, and the blowdown channel is communicated with the cavity through a vertical channel; a valve rod assembly comprising a valve rod, the valve rod is arranged in the valve cover, and the bottom of the valve rod is provided with a ball head valve core; a filter assembly comprising a filter screen arranged in the blowdown channel. Through the arrangement of the filter screen, the medium can be filtered, the solid particles are reduced to adhere to the sealing abutting ring, the sealing performance between the ball head valve core and the sealing abutting ring is improved, and the sealing effect between the ball head valve core and the valve seat is improved.

The utility model relates to the technical field of valves, and discloses a double-buffering type valve which comprises a valve body, one end of the valve body is fixedly connected with a water outlet, the end, away from the water outlet, of the valve body is provided with a double-buffering valve through a replacement assembly, and the end, away from the valve body, of the double-buffering valve is fixedly connected with a water inlet. The replacing assembly comprises a first connecting end fixedly connected with the end, close to the double-buffering valve, of the valve body, a second connecting end is arranged on the side, away from the valve body, of the first connecting end, a circular ring is fixedly connected to the middle end of the side, close to the second connecting end, of the first connecting end, and a sealing ring is fixedly connected to the end, away from the first connecting end, of the circular ring. The dual-buffering valve is rapidly disassembled and replaced through the first connecting end, when internal parts of the dual-buffering valve are damaged, maintenance or replacement loss can be reduced, and then the use cost performance of the dual-buffering valve is improved.

The application provides a deep-sea rapid blocking valve and a use method. The rapid blocking valve comprises a valve body, a valve cover and a valve rod. The valve body is internally provided with a valve cavity. The valve cover is connected with one side of the valve body to form a closed space. A flow channel is arranged in the valve cavity. A one-way valve structure and a two-way valve structure are arranged along the flow channel. The inner side end of the valve rod extends into the valve cavity and is connected with the one-way valve and the two-way valve in linkage. The one-way valve and the two-way valve are both provided with sealing structures between the valve body and the inner wall of the valve body. The L-shaped integrated valve body type is arranged in a side-mounted structure. The two-way ball valve is integrated in the interior. The structure is compact, light in weight, small in size, reduces the external leakage points of the valve, is convenient to install, improves the pressure-bearing capacity and the sealing capacity.

The utility model discloses a self-adaptive structure of a valve sealing surface, which comprises a motor output shaft, a plane thrust ball bearing, a spring, a rotating shaft, a base plate, a valve moving plate, a valve fixed plate and a valve fixing seat, and an arc-shaped structure is arranged at the center of the rotating shaft; an output shaft of the motor is matched and connected with the rotating shaft; a plane thrust ball bearing, a spring and a rotating shaft are sequentially mounted on the motor output shaft from bottom to top; the rotating shaft is connected with the base plate and the valve moving plate in a matched mode. And the valve fixed plate is attached and fixed to the valve moving plate attaching surface through the valve fixing seat. The utility model discloses can carry out the self-adaptation to the two fitting plane of valve stator plate and valve rotor plate, guarantee two fitting plane complete fit, prevent liquid leakage, also have pressure resistance simultaneously, the pressure can reach 0.8 Mpa.

The invention relates to a valve (1) for regulating a flow of a fluid between an inlet chamber (2) and an outlet chamber (3). The valve (1) has a valve body (4) which is movable by means of a slide (7) between a closed position and an open position, wherein the valve body (4) is provided to prevent the flow in the closed position and to enable it in the open position, wherein the slide (7) extends from the interior of the valve (1) through an opening to outside the valve (1), in order to be actuable from there. Furthermore, the valve (1) has a gaiter chamber (5) for receiving a gaiter (8) which is provided for sealing between the slide (7) and the opening, wherein a fluidic connection is established between the gaiter chamber (5) and the outlet chamber (3), in order to enable an equalization flow into the gaiter chamber (5) and out of the gaiter chamber (5), caused by a volume change within the gaiter chamber (5) on account of an actuation of the slide (7). The fluidic connection is established by means of an overflow element (61). The geometry of the valve (1) is designed in such a way that a direct impingement of particles, which pass into the gaiter chamber (5) by means of the equalization flow, on the gaiter (8) is prevented.

This utility model belongs to the field of valve technology, and specifically relates to a butterfly valve, which includes a valve body, a butterfly plate, a valve stem, a linkage mechanism, and a drive mechanism. The valve body has a flow channel, and the axis of the valve stem is offset relative to the central axis of the butterfly plate. The linkage mechanism has an input end and an output end connected to the valve stem, and the input end is offset relative to the output end. The drive mechanism is connected to the input end. Offsetting the valve stem relative to the centerline of the butterfly plate allows the butterfly plate to make point contact with the flow channel during opening and closing, thereby reducing wear between the flow channel and the butterfly plate and improving the service life of the butterfly valve. Furthermore, under the action of the linkage mechanism, the drive mechanism is offset relative to the output end, that is, relative to the valve stem. This setting ensures that the driving force of the drive mechanism is smoothly transmitted to the valve stem, avoiding additional torque imbalance caused by the valve stem offset, thereby reducing local wear between the flow channel and the butterfly plate and further improving the service life of the butterfly valve.

The utility model discloses a semiconductor transmission valve which comprises a valve body, a valve plate is vertically arranged at the bottom end in the valve body, supports are vertically arranged on the left side and the right side of the front face of the valve plate, a driving shaft is vertically and movably arranged between the supports, and the driving shaft is vertically located in the valve body. Air cylinders are vertically arranged at the two ends of the top end of the exterior of the valve body, a gas flow divider is arranged between the air cylinders, the gas flow divider is transversely located in the middle of the top end of the exterior of the valve body, the gas flow divider is connected with the air cylinders through pipelines, and pistons are transversely arranged in the air cylinders; the piston is connected with the driving shaft; and the piston and the driving shaft are in the same moving direction.

The application discloses a pneumatic reversing valve for natural gas, and belongs to the technical field of valves, which comprises an actuator, a valve and a valve rod, one end of the valve rod is rotationally connected in the actuator, the other end is located in the interior of the valve, and the valve and the actuator are connected through a plurality of bidirectional screw rods. When the application is used, the push wheel drives the plug body to move to the right, at this time, the plug body is inserted into the transition channel corresponding to the second interface, thereby completing the plugging of the second interface, at this time, the gas sleeve is extruded to generate wrinkles, the wrinkles of the gas sleeve can block the edge of the transition channel, thereby further increasing the sealing performance, the deeper the plug body enters the transition channel, the greater the wrinkles of the gas sleeve, and the sealing performance is further increased, the rotation angle of the push wheel is controlled to control the stroke of the plug body, thereby controlling the depth of the plug body entering the transition channel, so that the air tightness adjustment is more convenient.

The application relates to the technical field of stop valves, and discloses an ultralow-temperature stop valve, which comprises a valve seat and a valve body, the valve seat is arranged on the valve body, a valve rod for opening and closing the valve seat is arranged in the valve body, a packing part is arranged on the valve body, the packing part is used for plugging a gap between the valve body and the valve rod, a heat preservation sleeve is arranged on the valve body, a baffle is arranged on the valve body, the heat preservation sleeve is located on the side, away from the valve seat, of the baffle, and the heat preservation sleeve is located on the outside of the packing part. The heat preservation sleeve is arranged on the valve body, the heat preservation sleeve is located on the side, away from the valve seat, of the baffle, the baffle limits the movement of the heat preservation sleeve, the heat preservation sleeve can stably preserve the temperature of the packing part, the packing part is not prone to thermal bridge effect, and the condition that the packing part can quickly adsorb cold air is reduced.

The invention discloses a sealing device based on online adjustment and self-adaptive displacement compensation, which comprises a valve cover with a mounting hole in the middle; the first lining is arranged at the lower end in the mounting hole, and a first through hole and an annular groove located in the inner wall of the first through hole are formed in the middle of the first lining; the sealing ring is arranged in the mounting hole and located above the bushing, and the outer side of the sealing ring has a certain taper; the pressing ring is arranged in the mounting hole and located above the sealing ring, and a first cavity is formed between the containing groove and the sealing ring; the second bushing is arranged in the mounting hole and is positioned above the pressing ring; the compression nut is arranged in the mounting hole, is positioned above the second bushing and can drive the second bushing to axially displace so as to extrude the compression ring; the valve rod sequentially penetrates through the lining, the sealing ring, the pressing ring, the second lining and the pressing nut and is matched with the annular groove to form a second cavity. The axial positions of the sealing ring and the pressing ring can be adjusted on line, and the sealing effect is adjusted.

The application discloses a high-pressure double-seal gate valve, which comprises a valve body, a valve cover installed on the valve body, a valve rod installed on the valve cover and extending into the valve body, a gate plate installed on one end of the valve rod in the valve body, and sealing packing installed between the valve cover and the valve rod, wherein a sealing mechanism connected with the valve body is arranged at the position of the valve rod between the gate plate and the sealing packing, the valve rod control sealing mechanism has a first sealing state and a second sealing state, the sealing mechanism is in the first sealing state when the gate plate is in an open state, the sealing mechanism is in the second sealing state when the gate plate is in a closed state, and the flow of fluid medium towards the sealing packing is limited when the sealing mechanism is in the first sealing state or the second sealing state. The application has the advantages and effects that the double-seal structure can reduce the leakage probability between the valve rod and the valve cover, the gate valve can better adapt to severe working conditions, and the performance of the product is improved.

The utility model discloses a high-stability inner sealing structure of a stop valve. The high-stability inner sealing structure is characterized in that a limiting surface and a sealing surface which is connected with a valve rod, limits the moving stroke of the valve rod and has sealing performance are arranged at the bottom of a reverse sealing thread bushing; the sealing surface is arranged on the back sealing thread bushing, when the stop valve is opened, the sealing angle on the valve rod is matched with the sealing surface, the moving stroke of the valve rod is limited, meanwhile, when the sealing angle on the valve rod makes contact with the sealing surface, the back sealing thread bushing can be extruded, the back sealing thread bushing is made to be extruded outwards, and the stop valve is sealed. The sealing performance and the stability of connection between the back sealing thread bushing and the valve body are improved; through the arrangement of the high-strength sealing ring and the high-strength sealing groove, friction between the lower valve element and the interior of the valve body when the stop valve is opened and closed is avoided, the situation that the sealing performance is affected due to abrasion of the lower valve element caused by long-time friction is avoided, the sealing performance and stability of the stop valve are improved, and therefore the service life of the stop valve is prolonged.

The invention relates to the technical field of valve sealing, and discloses a stop valve which comprises a valve body and a valve rod and further comprises a sealing pressure-bearing part which is in sealing connection with the valve body, and a mounting space suitable for the valve rod to penetrate through and move axially is formed in the sealing pressure-bearing part; the outer sealing assembly is suitable for achieving outer sealing between the sealing pressure-bearing piece and the valve body; the inner sealing assembly is detachably arranged in a flow channel of the valve body, the outer sealing assembly is suitable for achieving inner sealing in the valve body, a main pressure-bearing boundary is jointly formed by the sealing pressure-bearing piece and the valve body, the outer sealing assembly at the connecting interface is matched, the structural stability of the pressure-bearing boundary can be effectively improved, deformation of the connecting portion under the action of external loads is reduced, and the service life of the valve body is prolonged. The outer sealing failure risk is reduced, and the sealing reliability of the valve is guaranteed; meanwhile, the inner sealing assembly is designed to be rapidly detached, maintenance and replacement can be completed by detaching the valve, and the maintenance process is simplified.

The utility model discloses an improved valve rubber sheet, which comprises a rubber seat and a rubber ring, the rubber ring is designed right above the rubber seat, the lower end of the rubber ring is fixedly connected with two positioning rods, the lower ends of the two positioning rods are respectively provided with a positioning device in a penetrating manner, and the rubber ring is arranged on the rubber seat. And two positioning grooves are formed in the positions, at the corresponding positions, of the side wall of the rubber base in a penetrating mode, the positions of the two positioning rods correspond to the positions of the two positioning grooves correspondingly, and connecting devices are fixedly connected to the inner walls of the two positioning grooves correspondingly. The rubber connecting device has the advantage that operators can conveniently position and connect the rubber.

The utility model provides a shunt valve structure which comprises a shunt valve body, a valve cover and a motor base, the valve cover and the shunt valve body are connected to define a shunt cavity, a sealing ring is arranged between the valve cover and the shunt valve body, a shunt shifting piece is rotatably connected in the shunt cavity, and the shunt valve body is provided with a water inlet and a plurality of water outlets which are communicated with the shunt cavity. The motor base is installed on the valve cover, a transmission cavity is defined by the motor base and the valve cover, a water diversion rotating shaft is arranged in the transmission cavity, the valve cover is provided with a hole position for the water diversion rotating shaft to penetrate through, a rotating shaft sealing ring is arranged at the position, corresponding to the hole position, in the transmission cavity, and the water diversion rotating shaft is connected with the rotating shaft sealing ring and penetrates through the hole position to be connected with the water diversion poking piece. And a driving motor connected with the water diversion rotating shaft is arranged on the motor base. Sealing structures are arranged between the water diversion valve body and the valve cover and at the connecting position between the water diversion rotating shaft and the valve cover, so that the air tightness problem of the water diversion cavity is solved.

The high-performance sealed full-lining plastic three-eccentric center butterfly valve comprises a valve body, a valve plate, a valve rod and a lower end cover which are connected together, the valve body comprises a valve body and a valve body lining plastic layer, the valve plate comprises a valve plate body and a valve plate lining plastic layer, the valve rod comprises a valve rod body and a valve rod lining plastic layer, and the lower end cover comprises a lower end cover body and a lower end cover lining plastic layer. The valve body, the valve plate body, the valve rod body and the lower end cover body are all made of metal materials. The valve body and the valve body plastic lining layer, the valve plate body and the valve plate plastic lining layer, the valve rod body and the valve rod plastic lining layer, and the lower end cover body and the lower end cover plastic lining layer are connected in an embedded mode. The sealing ring is reasonable in design, simple in structure, convenient to machine and capable of improving the sealing performance, reducing the torque, prolonging the service life and reducing friction.