63results about How to "Improve opening and closing effect" patented technology

The invention discloses a full-automatic intelligent rubbish bin. The full-automatic intelligent rubbish bin comprises a bin body, a rubbish throwing inlet, an automatic sorting device and a rubbish cavity. A control system is arranged in the bin body. The control system comprises a controller, a sensing device, a detection device, a verification and identification device, a voice broadcasting device and an operating screen. The sensing device, the detection device, the verification and identification device, the voice broadcasting device and the operating screen are all connected with the controller. The full-automatic intelligent rubbish bin is simple in structure, novel in design and capable of achieving full-automatic control. Using difficulty of users can be lowered, and meanwhile working efficiency of cleaning staff can be effectively improved. According to the control method, the controller is used for controlling the sensing device, the detection device, the verification and identification device, the voice broadcasting device, the operating screen and the automatic sorting device, and thus rubbish can be sorted automatically. Useful rubbish can be separated from unrecyclable rubbish more easily, rubbish treatment cost is reduced, and pollution caused in the sorting recovery processing of the rubbish can be reduced or avoided.

An amusing mask having composite formative variability function, which particularly integrates planar printed patterns with a three-dimensional form and produces variability therefrom, and is applicable for application in an air filter respirator. The present invention is configured to utilize the principle of closing and opening of the upper and lower jaws of the face of a person to actuate unitary animated simulation of the external appearance of a mouth of an animal or a cartoon figure. The present invention is primarily formed from upper and lower masks joined to mask holding members. The user can choose whether or not to combine adjoining decorations or a blow toy externally to the upper and lower masks and thereby achieve interesting and simulative dynamic amusement.

The invention belongs to the technical field of ultra-high voltage power transmission, in particular to a method for improving the converted current switching capability of an ultra-high voltage open alternating current isolating switch. Auxiliary circuits are added on a main contact to switch converted current, and isolating switches are used to guide the operation of electric poles, so that the converted current switching capability of the isolating switches can be greatly improved, and the use requirements for connecting the isolating switches in parallel can be met. Thus, by using the method, the converted current switching capability is greatly improved, the requirements for connecting the isolating switches in parallel are easily met, the influence of electric arcs is almost completely eliminated, the operation and the control of the isolating switches are greatly simplified, the cost is lowered and the reliability is improved.

The invention discloses a circuit breaker electrical contact support member and a preparation method thereof. The support member comprises a support member body made of a Cu / Fe / Cu material strip. One side of the support member body is provided with a built-in groove; the groove is embedded by a conductive insert block; and the insert block is provided with a contact point. The method is characterized by, carrying out thermal treatment on the Cu / Fe / Cu material strip, and rolling the Cu / Fe / Cu material strip obtained after thermal treatment; carrying out punching on the Cu / Fe / Cu material strip obtained after rolling to prepare the support member body; preparing the insert block, and inserting and welding the insert block to one side of the obtained support member body; and welding the contact point to the other side of the insert block. The support member is prepared by inserting the Cu block or other conductive metal blocks into the Cu / Fe / Cu composite strip, thereby improving the strength of the contact support member, ensuring stability of the current conduction when an electrical contact is contacted, and meanwhile, reducing copper material consumption and saving cost.

The present invention pertains to hinge lid packages, for example cigarette packages, with features that reduce the force required to open and close the package, keep the lid tightly closed when not in use and / or improve the luxurious feel of the package during opening and closing, in comparison to similar packages that do not include these features.

The invention belongs to the technical field of automobile aerodynamics, and particularly relates to an automobile drag coefficient optimization design method, which comprises the following steps of: based on flow optimization design, determining mutual interference parameters of front and back flows and overall data of an automobile, and establishing a corresponding automobile model; according to the determined automobile wind resistance data, an automobile head, a flat floor, an upper automobile body part, an automobile tail and a cooling system are improved, and corresponding models are established; based on design elements in multiple aspects, the wind resistance coefficient of the automobile is comprehensively optimized, and the error between the design and the actual wind resistance test is determined through stress analysis of the model; according to the corresponding errors, the vehicle head, the flat floor, the upper vehicle body part, the vehicle tail and the cooling system are corrected. According to the method, multi-factor condition analysis is carried out, and the factors influencing the automobile wind resistance parameters are analyzed, so that the automobile machine changing scheme is systematically determined. Each step in the modification scheme is refined, the modification strategy of each part is summarized through a large number of experiments, and wind resistance parameter optimization is improved.

The invention discloses an overload protective valve and an overload valve comprising the overload protective valve and relates to the technical field of engineering machinery. The overload protective valve comprises a valve sleeve and a pressure-regulating lead screw. The overload protective valve is characterized in that the rear end of the valve sleeve is connected with a valve sleeve base, the front end of a pressure-regulating valve seat is provided with external threads, the front end of the pressure-regulating valve seat is connected and fixed to the inner side of the rear end of the valve sleeve seat through the threads, and the pressure-regulating lead screw penetrates through the pressure-regulating valve seat to extend into the valve sleeve seat; a spring is arranged on the inner side of the valve sleeve seat between a valve element and the pressure-regulating valve seat. The overload protective valve aims to solve the problems that in the prior art, when an overload relief valve operates, the overflowing speed is low or operation fails, so that a controlled component is damaged, and the problem that the overload relief valve cannot replenish oil to a large cavity of the system, so that oil replenishment needs external assistance and the enterprise cost is increased is solved at the same time. The overload protective valve has the advantages of being simple in structure, good in opening and closing performance, high in overflowing speed, long in service life, capable of conducting oil replenishment work and the like. The invention further provides the overload valve comprising the overload protective valve.

The invention discloses a reclosure mechanism of a disconnector. The reclosure mechanism of the disconnector comprises an electromagnetic mechanism, a transmission mechanism and an opening / reclosure execution mechanism. The electromagnetic mechanism comprises a closure electromagnetic device (2) with a closure iron core (1), and an opening electromagnetic device (4) with an opening iron core (3). The transmission mechanism comprises a transmission shaft (5), wherein the transmission shaft (5) is in linkage with the closure iron core (1) and the opening iron core (3), thereby rotating under driving the closure iron core (1) or the opening iron core (3). The opening / reclosure execution mechanism comprises a shifting rod (32) capable of driving opening and closure motions of a handle of the disconnector, the shifting rod moves under driving the transmission shaft (5). An electromagnetic protection device is used for connecting and disconnecting current of the electromagnetic mechanism. The reclosure mechanism of the disconnector is simple in structure, and has a good opening / reclosure effect.

The invention discloses a constant-specific-pressure large-flow safety valve. The constant-specific-pressure large-flow safety valve comprises a valve body, a floating valve seat and a valve element assembly; a valve cavity is formed in the valve body, a liquid inlet communicating with the valve cavity is formed in a first end of the valve body, a liquid passing hole communicating with the valve cavity is formed in the peripheral wall of the valve body, and a first boss is arranged on the inner peripheral face of the valve body; the floating valve seat is arranged in the valve cavity in a matched mode and can move in the axial direction of the valve body, the floating valve seat is provided with a floating cavity, one end of the floating cavity communicates with the valve cavity, and the other end of the floating cavity can be disconnected from and communicate with the valve cavity; and the valve element assembly is arranged in the valve cavity in a matched mode and located between thefloating valve seat and a second end of the valve body, and the valve element assembly can move in the axial direction of the valve body so as to achieve disconnection and communication of the otherend of the floating cavity and the valve cavity. According to the constant-specific-pressure large-flow safety valve, the problem that sealing force fluctuates along with fluctuation of liquid pressure can be solved, stability is good, and reliability is high.

Disclosed is a railway hopper car comprising a car body (6), a top cover (1, 2), a bogie (24), a braking device (21), a coupler buffer device (22), and a bottom door (25,28) and a bottom door opening and closing mechanism (23) mounted at a discharge port at the bottom of a chassis. The railway hopper car further comprises a longitudinal saddle (31) disposed in the center of the car body (6) in the length direction thereof and arranged along the longitudinal direction of the car body (6). By providing the longitudinal saddle (31), the sequential requirement to close the left bottom door (25) and the right bottom door (28) is eliminated, thereby simplifying the structure of the linkage bottom door opening and closing mechanism and reducing manufacture and maintenance costs thereof.

The invention discloses an automobile sliding door system. The automobile sliding door system comprises a sliding door body, a middle guide rail and a lower guide rail, wherein a middle hinge matched with the middle guide rail is arranged in the middle of the sliding door body and a lower hinge matched with the lower guide rail is arranged at the lower part of the sliding door body; the lower guide rail comprises a lower guide rail upper transverse wall, a lower guide rail lower transverse wall and a lower guide rail vertical wall for connecting the lower guide rail upper transverse wall and the lower guide rail lower transverse wall; the lower guide rail further comprises a first vertical overturning edge which is connected with the lower guide rail upper transverse wall and a first guide groove which is formed by the first vertical overturning edge, the lower guide rail upper transverse wall and the lower guide rail vertical wall in a surrounding manner and has a downward opening; the lower hinge comprises a lower hinging part and a lower bearing part; the lower bearing part comprises a first bearing and a second bearing; the first bearing rolls along the lower guide rail vertical wall or the first vertical overturning edge by taking the vertical direction as the axial direction; the second bearing rolls along the upper surface of the lower guide rail lower transverse wall by taking the direction vertical to the lower guide rail vertical wall as the axial direction. According to the automobile sliding door system, an upper guide rail is not used under the condition of not influencing an original sliding function of the sliding door system, the integrity of a side wall structure is guaranteed and a good opening / closing performance is obtained.

The invention belongs to the technical field of household appliance production and locating and particularly relates to a household appliance production line locating mechanism. The household appliance production line locating mechanism comprises an operation platform. A fixed clamping plate, a movable clamping plate and a locating plate are arranged on the operation platform. The fixed clamping plate and the movable clamping plate are in positional correspondence. The locating plate is located on the right side between the fixed clamping plate and the movable clamping plate. The movable clamping plate is connected to a telescopic rod of a first driving cylinder. Through arrangement of the fixed clamping plate and the movable clamping plate, the household appliance production line locatingmechanism can clamp a raw material to be processed, can drive the movable clamping plate to move to achieve the clamping effect through cooperation of the first driving cylinder and facilitate opening and closing, can achieve the locating and limiting effect on the raw material to be processed through the locating plate, can achieve the stop effect on the material, can push out the processed material to an assembly line through cooperation of a third driving cylinder and a push plate and is convenient to operate.

The invention provides a box body for housing an electric apparatus. In an assembled box body divided into a back plate and a front frame, the deformation of the back plate due to the unevenness of an accommodation part is prevented and the front frame is easily assembled to improve the opening and closing performance of the door. The box body (1) for housing an electric apparatus comprises a back plate (3) arranged on the wall face of a building and a front frame (7) mounted on the front side of the back plate. A door (8) is supported by the front frame (7). The back plate (3) is equipped with a substrate (11) for the installation of electric devices (40) and an installation hole (23) for fastening the mounting screw. A slit (27) is formed around the installation hole (23). A flexible part (28) corresponding to the unevenness of a wall is arranged between the slit (27) and the installation hole (23).

The invention provides a pivot module and an electronic device, wherein the pivot module includes a first component, a pushing component, a second component and an elastic component. The first part has an accommodating groove, and the push piece is movably arranged in the accommodating groove along one direction. The second component has a pivot shaft, which is rotatably installed in the receiving groove along an axis, so that the first component and the second component can rotate relative to each other along the axis. The elastic element is arranged in the receiving groove and abuts against the ejecting element, and the elastic element constantly drives the ejecting element to move along the direction, so that the pivot shaft is rotatably abutted between the ejecting element and the first component. Said direction is perpendicular to this axis.

The invention relates to the technical field of blood collection tube placing devices, in particular to a blood collection tube placing device for a medical clinical laboratory. The blood collection tube placing device comprises a box body mechanism, wherein a driving mechanism is mounted on the box body mechanism, the box body mechanism is limited by the driving mechanism, a disinfection mechanism is arranged on the driving mechanism, and the driving mechanism drives the disinfection mechanism. According to the invention, through the arrangement of the disinfection mechanism, disinfection liquid medicine can be conveniently sprayed into the box body mechanism to sterilize and disinfect the interior of the box body mechanism, so that the sanitation of the interior of the box body mechanism is guaranteed; by arranging a shaking mechanism, the arranged blood collection tube can be shaken conveniently, the blood coagulation time in the blood collection tube is prolonged, and mixing of the blood collection tube and a medicament is accelerated conveniently; and by arranging a clamping mechanism, the blood collection tube can be clamped conveniently, the blood collection tube can be shaken and swung reasonably along with the action of the shaking mechanism, blood coagulation is avoided, manual shaking is avoided, and the labor intensity is reduced.

The invention belongs to the technical field of daily necessities, and particularly discloses a using method of an intelligent curtain. The using method includes the steps that 1, the intelligent curtain is installed, two fixing frames are installed on a wall, and a guiding rod is installed between the fixing frames; 2, preparation is performed before the intelligent curtain is used, and an air pump is started and charged with air to push a sliding plate to move; 3, the curtain is closed, an air-guiding pipe extends to push transverse rods and idler wheels to move, the transverse rods and theidler wheels move to drive rockers to move upwards to wipe the curtain, and the curtain is closed; 4, the curtain is opened, the air pump is started to pump the air, the air-guiding pipe retracts to drive the transverse rods and the idler wheels to get close together, and the rockers move to wipe and clear the surface of curtain cloth. The using method is mainly used for indoor decorating and shading, and solves the problem that because cleaning frequency is high, the service life of the curtain is shortened.

The invention relates to the field of medical instruments, and in particular, relates to a multi-layer composite bionic polymer valve leaflet and a manufacturing method thereof. The multi-layer composite bionic polymer valve leaflet comprises a first fiber layer, a porous polymer sponge layer and a second fiber layer; the first fiber layer is generally of a latticed structure; moreover, on the plane of the bionic polymer valve leaflet, high-strength fibers are distributed on the first fiber layer in the circumferential direction or the longitudinal direction, and high-elasticity fibers are distributed on the first fiber layer in the radial direction or the transverse direction; the porous polymer sponge layer is constructed to simulate a sponge layer of a natural valve; the second fiber layer is constructed to simulate a surface layer, located in a heart chamber, of the natural valve, the second fiber layer is generally of a latticed structure, and high-elasticity fibers are distributed on the second fiber layer in the circumferential direction or the longitudinal direction on the plane of the bionic polymer valve leaflet; and high-strength fibers are arranged on the second fiber layer in the radial direction or the transverse direction.

The invention provides an intermittent lifting assembly and a mobile terminal, and the intermittent lifting assembly is used for driving a heat dissipation plate of the mobile terminal to be opened and closed, and comprises a first driving part which comprises a first intermittent gear and a convex shoulder arranged on the first intermittent gear; a second driving part which comprises a second intermittent gear meshed with the first intermittent gear, and a limiting groove is formed in the second intermittent gear; the limiting groove is used for limiting the rolling position of the convex shoulder in a state that the teeth of the first intermittent gear and the teeth of the second intermittent gear are disengaged from each other; a notch for avoiding the second intermittent gear is formedin the convex shoulder; and a swing rod which is fixedly connected with the second intermittent gear and used for driving the heat dissipation plate to be opened and closed. Through intermittent movement of the first driving part and the second driving part, the linkage effect of the display screen and the heat dissipation plate when the mobile terminal is started is improved, and the use effectof the mobile terminal is improved.

The invention relates to the technical field of display screen detection devices, in particular to a mobile phone display screen flexibility detection device and a detection method thereof. The mobile phone display screen flexibility detection device used in the method comprises a main body, wherein a drawer is arranged on the main body in a sliding fit mode, an opening and closing mechanism is arranged on the main body, a lifting mechanism is assembled on the opening and closing mechanism, a springback mechanism is assembled between the drawer and the main body, the drawer is connected with a distance changing mechanism, and a storage mechanism is rotationally arranged on the distance changing mechanism. According to the invention, by arranging the opening and closing mechanism, the lifting mechanism can be shielded and closed, the opening and closing mechanism is matched with the lifting mechanism to conveniently lift the detection part to the height for placing the screen, and the screen is convenient to take; and through the arrangement of the distance changing mechanism, the distance between the multiple storage mechanisms can be conveniently adjusted in a unified mode, the storage mechanisms can conveniently display the mobile phone screens, the distance changing mechanism is matched with the storage mechanisms, the storage effect of the drawer can be improved, and the mobile phone screens can be conveniently taken for detection.

The invention relates to the field of partial discharge detection devices, in particular to a GIS positioning-based handheld partial discharge detection device, which comprises a main body, a protection mechanism, a shielding mechanism, a pulling mechanism, a limiting mechanism and a charging mechanism, easily-damaged edges and corners of the main body can be protected through the arrangement of the protection mechanism, the designed convenient-to-hang part liberates the hands of a user, the user is prevented from holding the charging mechanism for a long time, the portability of the device is improved, and the exposed part of the charging mechanism can be shielded and the appearance of the main body can be beautified through the arrangement of the shielding mechanism. Through arrangement of the pulling mechanism, after limitation of the limiting mechanism on the shielding mechanism is removed, a sealing component in the shielding mechanism can be reset to an initial position, through arrangement of the limiting mechanism, the sealing component in the shielding mechanism can be conveniently limited in the main body, and through arrangement of the charging mechanism, electric quantity can be supplemented to the main body in time; and the hidden charging design improves the integration level and the aesthetic degree of the main body.

The invention discloses an intelligent helmet, and relates to the technical field of intelligent helmets. The intelligent helmet comprises a helmet body. The helmet body is composed of an outer shelland an inner shell. A protection cushion is arranged on the inner wall of the inner shell. A wind shield cover is movably connected with the middle of the outer side of the outer shell. A microphone is fixedly connected with one side of the bottom end of the shell. A battery is fixedly connected with one end of the outer side of the outer shell. A first arc-shaped plate is fixedly connected with the inner side of the shell. A second arc-shaped plate is fixedly connected with the outer side of the inner shell. According to the intelligent helmet, by designing the helmet into the inner layer andthe outer layer and arranging the first arc-shaped plate and the second arc-shaped plate between the outer shell and the inner shell, a protection effect is achieved on the head; by arranging a button device and a control center, the one-key call answering effect can be achieved, people can conveniently answer a call, the safety is improved when a rider drives an electric vehicle, the one-key call making function is achieved, the rider can conveniently contact with a customer before arriving at the destination, and the meal delivery efficiency is improved.

The invention discloses a cutter-shaped filling valve for a much-sediment river plane gate. The cutter-shaped filling valve comprises a hoisting rod, a hole groove, a bearing shaft and a valve plate, wherein the top of the hoisting rod is hinged to a hoisting head of a hoist, the hole groove is formed in the middle of the hoisting rod in the longitudinal direction, the bearing shaft penetrates through the hole groove and is fixedly connected with the plane gate, the valve plate of a valve chamber is arranged between a plane gate water inlet and a sluice channel, and the upper end of the valve plate is connected with the lower end of the hoisting rod. The lower end face of the valve plate is of a cutting edge structure upwards inclining towards the downstream side, and the inclined angle alpha is larger than 30 degrees. The longitudinal section of the hoisting rod is of a U-shaped structure, and the position, located below the hole groove, in the hoisting rod of the U-shaped structure is provided with a guiding wheel matched with a gate groove in a rolling mode. The valve chamber is internally provided with a rubber hermetic seal which is sealed with the valve plate plane and surrounds the water inlet. The two side walls, located on the downstream, in the valve chamber are provided with a cantilever type supporting main rail and a lateral guide rail. The cutter-shaped filling valve has the advantages that the cutter-shaped filling valve is designed for much-sediment rivers, the door closing force of the plane gate is reduced, and the problem of the water-equalizing pressure of a water stopping plane gate on the upstream of the much-sediment rivers is solved.

The invention discloses an oscillating type steel pipe feeding device and belongs to the field of seamless steel pipe processing machines. The oscillating type steel pipe feeding device comprises a rack, a mobile trolley arranged on the upper portion of the rack, an oscillating mechanism supported on the mobile trolley, a feeding mechanism connected with the mobile trolley, an oscillating disc driving mechanism connected with the oscillating mechanism, a clamp mechanism arranged on the oscillating mechanism, a clamp opening and closing driving mechanism arranged on the oscillating mechanism and connected with the oscillating mechanism, and a steel pipe supporting and protecting guide mechanism arranged at the right end of the rack. The oscillating type steel pipe feeding device is characterized in that the feeding mechanism comprises a feeding action cylinder fixing base and a feeding action cylinder; the feeding action cylinder fixing base is fixed to the left end of the rack; the feeding action cylinder is connected with the feeding action cylinder fixing base; a feeding action cylinder column is connected with the mobile trolley; the clamp opening and closing driving mechanism and the clamp mechanism are connected; and the oscillating disc driving mechanism is arranged on the rear side of the right end of the mobile trolley. By means of the oscillating type steel pipe feeding device, the structure is simplified, and the labor intensity is relieved; the acting force transmission link is omitted, and the opening and closing effect of the clamp mechanism is ensured; and the motion stability is good, and occupied space is small.

The invention relates to the field of curtains, in particular to an intelligent curtain. The intelligent curtain comprises two pieces of curtain fabric, an opening and closing structure, a sliding rod, two bases, a guide structure and a clamping groove; the two pieces of curtain fabric are seamed in a protective sleeve, the opening and closing structure is connected with the sliding rod in a sliding mode, and then a pulling rope can be pulled to drive a plurality of positioning sleeves to slide on the sliding rod, so that the two pieces of curtain fabric can be driven to slide relatively or oppositely through the positioning sleeves, and the two pieces of curtain fabric are controlled to be opened and closed on one side, so that the curtain fabric can be conveniently applied to the interior of a child room and applied to windows with relatively high height; the sliding friction force of the positioning sleeves is changed into rolling friction through the guide structure, so that pulling of the positioning sleeves is more labor-saving, and convenience is brought for children to operate; meanwhile, the positioning sleeves are more uniform in stress, so that the opening and closing effect of the curtain is better; simultaneously, the opening and closing structure drives the curtain fabric to vibrate when driving the guide structure to roll on the sliding rod, so that insects can be effectively prevented from gathering on the curtain fabric, and the storage effect of the curtain fabric is better.

The invention discloses an oscillating type steel pipe feeding device and belongs to the field of seamless steel pipe processing machines. The oscillating type steel pipe feeding device comprises a rack, a mobile trolley arranged on the upper portion of the rack, an oscillating mechanism supported on the mobile trolley, a feeding mechanism connected with the mobile trolley, an oscillating disc driving mechanism connected with the oscillating mechanism, a clamp mechanism arranged on the oscillating mechanism, a clamp opening and closing driving mechanism arranged on the oscillating mechanism and connected with the oscillating mechanism, and a steel pipe supporting and protecting guide mechanism arranged at the right end of the rack. The oscillating type steel pipe feeding device is characterized in that the feeding mechanism comprises a feeding action cylinder fixing base and a feeding action cylinder; the feeding action cylinder fixing base is fixed to the left end of the rack; the feeding action cylinder is connected with the feeding action cylinder fixing base; a feeding action cylinder column is connected with the mobile trolley; the clamp opening and closing driving mechanism and the clamp mechanism are connected; and the oscillating disc driving mechanism is arranged on the rear side of the right end of the mobile trolley. By means of the oscillating type steel pipe feeding device, the structure is simplified, and the labor intensity is relieved; the acting force transmission link is omitted, and the opening and closing effect of the clamp mechanism is ensured; and the motion stability is good, and occupied space is small.

The invention relates to enzyme purification and separation equipment with high separation efficiency. The equipment comprises a frame body and a separation box arranged on the frame body, a liquid inlet pipe for a mixed solution to enter the separation box is arranged on the bottom wall of the separation box and communicated with the separation box, a liquid outlet pipe is arranged at the bottom of the side wall of the separation box and communicated with the separation box, switches are arranged on the liquid inlet pipe and the liquid outlet pipe, a first filter plate is arranged in the separation box in a crossing and sealing mode, the first filter plate is arranged in the separation box in a sliding mode in the height direction of the separation box, a driving mechanism used for driving the first filter plate to move in the height direction of the separation box is arranged on the separation box, an opening and closing mechanism used for opening or closing filter holes in the filter screen is arranged on the first filter plate, and a discharging mechanism used for pushing separated enzyme into the liquid outlet pipe is arranged on the side wall of the separation box. The equipment has the advantage of improving the enzyme separation efficiency.

The invention discloses a closed electro-hydraulic gate valve and belongs to the technical field of gate valves. The closed electro-hydraulic gate valve comprises a hydraulic station and a gate valve used with each other. The gate valve comprises a gate body and a cylinder connected with each other. After fitting, the cylinder is connected with the hydraulic station. The full-closed gate body is made of stainless steel. The closed electro-hydraulic gate valve is powered by the hydraulic station, effective in opening and closing, free of jamming, safe and reliable. In addition, the special gate body is ensured to be free of gas leakage during closing, and the closed electro-hydraulic gate valve is safe and durable. The closed electro-hydraulic gate valve is compact in structure, easy to maintain, and suitable for popularization and application in production and operation.