59results about How to "Close smoothly" patented technology

The invention discloses a stop valve for fluid control and a working method of the stop valve, solves the problem that in the prior art, due to the fact that a valve rod and a valve element are not aligned, the opening and closing function is prone to failure, and has the beneficial effects that the stop valve for fluid control comprises a valve body, and the valve body forms a fluid opening and closing channel; the valve body is connected with the middle valve cover in a sealed mode, the middle valve cover is connected with the upper valve cover in a sealed mode, a driving piece is arranged at the position of the upper valve cover, the driving piece can rotate relative to the upper valve cover, the driving piece is connected with the valve rod through a thread structure, and the valve rod sequentially penetrates through the upper valve cover, the middle valve cover and the valve body and then is connected with the valve element. One section of the valve rod is in sliding connection with the upper valve deck or the middle valve deck to limit rotation of the valve rod along with the driving piece, so that the valve rod drives the valve element to move relative to the valve body in the axis direction of the valve body, and opening or closing of the opening and closing channel is achieved.

The invention discloses a scraper type C-shaped ball valve, relates to the technical field of ball valves, and aims to ensure the sealing effect, a backing ring is arranged in a gap between a valve seat and a valve core, so that the sealing performance is improved, the smoothness during closing is reduced, and meanwhile, the valve core is easy to wear. According to the scraper type C-shaped ball valve, the backing ring and the arc-shaped edge are matched with the sealing ring, in the process of closing the ball valve, the arc-shaped edge of the backing ring firstly makes contact with the valve element, the valve element is guided, meanwhile, friction between the valve element and the valve element is reduced, it is guaranteed that the ball valve is closed smoothly when the valve element rotates, and clamping degree and valve element abrasion increase during closing are avoided; under the action of the elastic force of the spring, the sliding ring drives the sealing ring to be tightly attached to the edge gap position of the sealing face of the valve element, and it is guaranteed that after the sealing face of the valve element is abraded, the good sealing performance is still achieved.

A cooking utensil with a retaining structure, the cooking utensil comprising a pot base, an inner pot placed on the pot base and a pot cover hingedly connected to the rear end of the pot base in a flip manner, the inner pot having a rigid pot rim protruding outward, the pot cover comprising an outer cover and a rigid member installed under the outer cover, the pot cover being used to cover the pot mouth of the inner pot based on a lid closing action; the characteristic is that a locking mechanism is arranged on the outer cover, the locking mechanism comprises at least one pair of support frames slidably arranged on the outer cover, the support frames are provided with at least one rigid clamp with a clamping mouth, the rigid clamp is used to clamp the rigid member and the rigid pot rim of the inner pot; and the cooking utensil also comprises an intermediate transition arm body movably arranged on the outer cover, when the intermediate transition arm body moves in the forward direction, it can drive the support frame to move toward the outer side of the outer cover so as to allow the rigid clamp to separate from the rigid member and the rigid pot rim of the inner pot to achieve unlocking, and when moving in the reverse direction, it allows the support frame to move toward the center direction of the outer cover so as to achieve locking.

The invention belongs to the technical field of two-way cartridge valves, and particularly relates to a large-flow two-way cut-off two-way cartridge valve based on quantitative control, which comprises a main valve, a pilot electromagnetic valve, a cover plate, a first one-way valve and a second one-way valve, the main valve comprises a main valve sleeve, a main valve core, a main valve spring and a cover pad; the pilot electromagnetic valve comprises a pilot valve sleeve, a pilot valve element, a pilot reset spring, a pilot cone valve element, an armature, a threaded sleeve and a coil. A first working opening and a second working opening are formed in the side face and the bottom of the main valve respectively, the main valve element is arranged in an axial hole of the main valve sleeve, the cover gasket is arranged at one end of the main valve sleeve, the main valve spring is arranged in an inner hole of the main valve element, and the cover plate is fixedly installed at the upper end of the cover gasket. The device solves the problem that the quantitative release effect is influenced by low release amount precision during quantitative release due to the fact that an existing two-way cut-off two-way cartridge valve is large in leakage after being used for a long time, cannot play a role in pressure maintaining and is slow in response time.

The invention discloses an automatic filling machine and a filling method thereof, and aims to provide an automatic steel cylinder filling machine and a filling method which can automatically and accurately position the orientation of a valve nozzle of a steel cylinder angle valve and a gun nozzle of a filling gun and can realize automatic gun feeding. Comprising a rack, an executing mechanism, a freely rotating steel cylinder tray mounted on a base, a first cylinder clamping device for fixing a steel cylinder, a second cylinder clamping device for aligning the position of the steel cylinder and assisting in adjusting the direction of a valve nozzle of an angle valve, and a control system, the executing mechanism comprises a buffering air cylinder, a lifting air cylinder, an angle valve automatic opening and closing unit, a guiding pressing head, a guiding pressing head driving air cylinder, a filling gun and a filling gun driving air cylinder. The buffering air cylinder is connected with the angle valve automatic opening and closing unit, and the control system controls the executing mechanism, the first bottle clamping device and the second bottle clamping device to act cooperatively. According to the filling machine and the filling method, the orientation of the valve nozzle of the steel cylinder angle valve and the gun nozzle of the filling gun can be automatically and accurately positioned, filling automation is achieved, the labor intensity is reduced, and the filling efficiency is improved.

The application provides a riverway sediment sampling device, belonging to the technical field of riverway sediment sampling, which comprises a shell and sampling barrels. The bottom of the shell is slidably connected with two sampling barrels which are oppositely arranged with openings. The shell is internally provided with wedge blocks. The wedge blocks and the inner wall of the shell are provided with springs. The two wedge blocks are provided with trapezoidal blocks. In the above scheme, the wedge blocks, the springs and the sampling barrels are arranged. The two sampling barrels are folded. The design of the spring enables the sampling barrels to continuously maintain the state of mutual extrusion. The closure between the two sampling barrels is tight. When the compact sediment is stuck between the two sampling barrels, the rubber diaphragm is bulged to one side to increase the available storage space in the sampling barrel, thereby further accommodating the sediment, enabling the sampling barrel to be smoothly closed, and enabling the sample to be smoothly collected.

The utility model belongs to the technical field of coal coking equipment, and particularly relates to a carbonization chamber pressure regulating valve and a pressure regulating system.The carbonization chamber pressure regulating valve comprises a valve body and an executing mechanism, and the valve body comprises an inner cylinder, an outer cylinder, an upper port and a lower port; the inner cylinder and the outer cylinder are coaxially arranged and fixedly connected together through the upper port, the lower port is fixedly connected with the bottom end of the outer cylinder, the upper port, the outer cylinder and the lower port form a valve body shell, the upper port, the inner cylinder and the lower port form a valve body channel, and the valve body channel is communicated with the valve body shell. And a driving turning plate and a driven turning plate are arranged between the inner barrel and the outer barrel. The pressure regulating valve is favorable for solving the technical problems that the pressure regulating valve in the pressure regulation of the coking chamber of the existing domestic coke oven is relatively high in boundary dimension, is not convenient to install and apply, is not smooth to open and close, is easy to block and burn a driving part, and is low in control precision.

The invention relates to the technical field of testing devices, in particular to a circuit board testing device and system in an electronic product, and the device comprises a testing box and a box cover on the testing box, a functional seat is mounted in the testing box, a movable groove is formed in one side of the functional seat, power connection seats are distributed in the movable groove, and a movable seat is slidably mounted on the movable groove in a limiting manner; a socket is movably installed at the bottom of the movable seat, the socket is installed on the movable seat in an attached mode through an elastic guiding piece, a control structure is installed on the movable seat, the socket moves downwards to be connected with the power connection seat when the control structure is fixed, an external connection plate is arranged on the movable seat and electrically connected with the socket, and a test pen is connected to the external connection plate through a cable; a sliding seat is transversely and movably installed on the box cover, a jig is fixedly installed on the sliding seat, a magnetic strip is installed on the side face of the sliding seat, a balance weight seat is vertically and movably installed on the box cover, and a magnetic block capable of automatically steering is arranged in the balance weight seat; the purpose of improving the integration and portability of the testing device is achieved.

The utility model relates to a liquid medicine transfer needle and a liquid medicine transfer device, and the main body of the liquid medicine transfer needle is a long and straight cylindrical needle body; two ends of the needle body are sharpened to form needle tips; the needle body is internally provided with two channels which are isolated from each other, namely a liquid medicine channel and a gas channel; the two channels penetrate through the needle body and are connected with the needle tips at the two ends; the liquid medicine channel is an arc-shaped hole, and the gas channel is a round hole; the cross section area of the liquid medicine channel is larger than that of the gas channel. The liquid medicine transfer device comprises the liquid medicine transfer needle and a buckle, a partition flat plate is arranged at the position of a partition plane in the middle of the liquid medicine transfer needle; and the buckle is formed on one side of the partition flat plate. The utility model has a simple structure, and is easy to manufacture by one-step molding through injection molding; through the special structural design, the liquid medicine transfer process is fast and smooth; meanwhile, when the needle point pierces the rubber plug of the medicine bottle, rubber particles cannot be separated, and safety and reliability in the using process are improved.

The utility model relates to the technical field of cat litter basin, especially a cat litter collecting device. It comprises: a base, a driving part, a cat litter cylinder and a collecting assembly; the cat litter cylinder and the driving part are both installed on the base, and one end of the cat litter cylinder is connected with the driving part, and the other end of the cat litter cylinder is provided with an entrance for the cat to defecate in the working cavity of the cat litter cylinder; the collecting assembly is arranged on the cat litter cylinder and communicates with the working cavity, is used for fixing the garbage bag for collecting cat excrement, and the collecting assembly supports the bag opening of the garbage bag and guides the cat excrement into the garbage bag after driving the cat litter cylinder to rotate. The device not only easily fixes the garbage bag and reserves a moving space for the cover plate, but also improves the stability of the cover plate through counterweight improvement, improves the success rate of the garbage bag for collecting cat excrement, and has a simple structure and is easy to use.

The utility model discloses a computer case, a body is internally provided with a heat dissipation assembly, the heat dissipation assembly comprises front frames, a rear heat dissipation fan, a front heat dissipation fan, a front dust removal net, a rear dust removal net and a placement box, the front frames are installed at the two ends of the interior of the body, the rear heat dissipation fan is installed on the front frame on one side, and the front dust removal net is installed on the rear dust removal net on the other side. The front cooling fan is installed on the front frame on the other side, the front dust removal net is detachably installed on one side of the front cooling fan, the rear dust removal net is detachably installed on one side of the rear cooling fan, and the containing box is installed at the top end of the interior of the body. A switch assembly is arranged on the body, the switch assembly comprises a rotating shaft, a side cover plate and an inserting column, the rotating shaft is arranged on one side of the body, the side cover plate is connected with the rotating shaft, and the inserting column is installed on the side cover plate, so that the technical problem that the heat dissipation efficiency is low in the background technology is solved.

An evaporator structure for a sprinkler ice maker includes an upper cover assembly and an ice-making mold assembly. The ice-making mold assembly has several forming cavities for forming ice blocks. It also includes a base plate assembly, an elastic connecting rod assembly, a transmission assembly, and a motor assembly. The motor assembly drives and connects to the transmission assembly. One end of the elastic connecting rod assembly is connected to the transmission assembly, and the other end is elastically connected to the base plate assembly. The base plate assembly and the upper cover assembly are rotatably connected via the transmission assembly. This invention, by configuring the base plate assembly, elastic connecting rod assembly, transmission assembly, and motor assembly, allows the base plate assembly to cover the bottom of the upper cover assembly in the first position, closing the forming cavities and resulting in a flatter bottom and more regular ice shape. When the evaporator releases ice, the motor assembly, transmission assembly, and elastic connecting rod assembly work together to rotate the base plate assembly downwards, opening the forming cavities. The ice blocks fall downwards into the ice storage container due to gravity, allowing the evaporator to release ice smoothly.

The utility model discloses an anti-coking, impact-resistant and vibration-resistant adjusting ball valve for coal chemical industry black water, and relates to the field of adjusting ball valves. In coal chemical industry black water treatment, a black water medium has the characteristics of high suspended matter content, high temperature, high alkali content, high corrosion content and high-hardness solid particle content, and abrasion, corrosion, coking jamming and driving failure of traditional valve internals are easily caused. Comprising a fixing shaft, a left valve body, a right valve body, a left valve seat, a right valve seat, a ball body, a valve rod and an executing mechanism, the ball body, the valve seats and valve body flow channels are spray-welded with tungsten carbide layers with the hardness larger than or equal to HRC65, the left valve seat and the right valve seat achieve two-way pre-tightening sealing through spiral springs and the ball body, and scraper type cutting edges are arranged on the sealing faces of the valve seats. The valve rod adopts a large-diameter high-strength design and is in anti-rotation connection with the ball body, and the stuffing box adopts a disc spring load limiting and pressurizing structure. The wear resistance, impact resistance and coking resistance are remarkably improved, bidirectional reliable sealing is achieved, stable driving under the high-torque working condition is guaranteed, the service life of the valve is prolonged, and the valve is suitable for the coal chemical industry black water extreme working condition.

The utility model discloses a self-locking opening packaging box which is used for packaging products. The packaging box comprises an upper box, an inner periphery and a pressing structure, and the upper box covers the inner periphery and is connected with the inner periphery in a matched mode through the pressing structure; the inner periphery is provided with a mounting hole, the pressing structure is fixed on the inner periphery through the mounting hole, the upper box is provided with a fixing hole, the pressing structure is provided with a movable pressing part, the pressing part has a first position state and a second position state, and when the pressing part is in the first position state, the pressing part is in the second position state. When the pressing part is in the first position state, the top surface of the pressing part is flush with the surface of the inner enclosure, so that the inner enclosure and the upper box are unlocked, and when the pressing part is in the second position state, the top surface of the pressing part protrudes out of the fixing hole, so that the inner enclosure and the upper box are locked.

The utility model provides a kind of nuclear power plant explosion vent, including foundation, the door frame body is fixed in foundation top, the first door body and second door body are further included in the door frame body, the recess is equipped with multiple buckles in the door frame body inward recess, the recess is equipped with expansion seal strip with buckle cooperation installation, the expansion seal strip is tightly attached to the first door body and second door body outer side wall, multiple cavities are evenly distributed in the soft seal strip, multiple cavities are equipped with air bag, reaction liquid is equipped in the air bag;The first door body and second door body inboard wall are cambered surface, and the first door body and second door body inboard wall upper position are connected with multiple shunt parts for air drainage, after explosion air bag is extruded, reaction liquid penetrates expansion seal strip, expansion seal strip expands rapidly, fills entire recess, forms solid sealing layer, effectively blocks harmful substance leakage, ensures safety.

The utility model discloses a diagonal draw bar for an inward casement door and window in the field of building door and window hinges, which comprises a door and window sash mounting seat and a door and window frame connecting component, the door and window frame connecting component is hinged with the door and window sash mounting seat, a door and window sash fixing arm is provided with an accommodating cavity, and an adjusting component is arranged in the accommodating cavity. The adjusting assembly comprises an elastic piece, an adjusting block and an adjusting piece, one side of the elastic piece abuts against the bottom of the containing cavity, at least one part of the other side of the elastic piece is arranged on one side of the adjusting block in a sleeving mode, the other side of the adjusting block abuts against the adjusting piece, and the door and window frame connecting assembly is hinged to the adjusting block. The problems that after an existing diagonal draw bar and an inner side-hung door and window sash are subjected to corner falling, opening and closing of a door and window are strenuous, and even normal use cannot be achieved in the serious situation are solved, the moving direction of the inner side-hung door and window sash is opposite to the corner falling direction, the corner falling phenomenon can be effectively corrected, the door and window sash is restored to be parallel to the door and window frame again, and the service life of the door and window is prolonged. The door and window can be opened and closed smoothly, and normal use of the inward side-hung door and window is prevented from being affected.

The purpose of the present invention is to provide a car limiter that can realize electric opening and closing of a car door. To achieve the above purpose, the present invention adopts the following technical scheme: a car limiter, including a driving mechanism, a limit arm, a door fixing seat and a body fixing seat, one end of the limit arm in the length direction is always fixed in a shell, the other end of the limit arm in the length direction extends out of the shell and is fixed to the body fixing seat, the shell is fixed to the door fixing seat, the limit arm is linked to the driving mechanism, the driving mechanism includes a driving motor, and the limit arm moves along the length direction under the action of the driving mechanism to adjust the length of the limit arm located outside the shell.

The utility model relates to the technical field of household appliances, and discloses drawer type clothes treatment equipment which comprises an outer box body and a drawable inner box body, and a door plate is arranged on the front side of the inner box body; the door lock assembly is arranged on the inner box body or the door plate and comprises a lock body and a lock tongue. A gap adaptation structure is arranged in the outer box body and comprises a fixed part, a sliding part and an elastic part; the sliding piece is arranged on the fixed piece in a sliding mode in the direction perpendicular to the drawing direction. A plurality of positioning steps are arranged on the sliding piece, when the spring bolt extends out, the gap between the spring bolt and the sliding piece in the drawing direction can be compensated through matching with different positioning steps, and meanwhile the freedom degree of the inner box body in the drawing direction is limited; and the elastic piece is used for self-adaptive sliding of the sliding piece during locking and resetting after unlocking. According to the drawer type clothes processing equipment, when different gaps exist, the gaps can be filled through effective matching of the spring bolts and the corresponding positioning steps, so that the freedom degree of the inner box body in the drawing direction is precisely limited, and the inner box body is prevented from shaking.

The utility model belongs to the technical field of display devices, and particularly relates to a display device capable of displaying characters and used for cultural science and technology propaganda, which comprises a display cabinet and a bottom plate, universal wheels are fixedly connected around the lower surface of the bottom plate, and double rows of support columns are fixedly connected on two sides of the upper surface of the bottom plate. Reinforcing rods are fixedly connected to the middles of the sides, close to each other, of the double-row supporting columns, and the tops of the double-row supporting columns are fixedly connected to the two sides of the lower surface of the display cabinet. And a propaganda mechanism is arranged in the display cabinet. According to the cultural and scientific propaganda display device capable of displaying the characters, the rainproof plate is fixed through the first supporting column and the second supporting column, rainwater is effectively prevented from directly falling on the display cabinet, internal electronic equipment and propaganda materials are protected, and the service life is prolonged. The design of the drainage groove can discharge accumulated water on the rainproof plate in time, the push plate driven by the air cylinder can automatically clean sundries in the drainage groove, the drainage groove is prevented from being blocked, and smooth drainage is guaranteed.

This invention discloses a cruise ship canopy raising and guiding device, including a bulkhead, a bulkhead support structure, a raising and guiding rail, and a raising wheel. By installing a guide wheel on the canopy brake, and using the raising and guiding rail to fix the raising device, the device raises the entire brake height above the inflatable sealing element, achieving braking and parking of the canopy and ensuring complete closure. This invention allows the canopy to be parked at any position, meeting the technical requirements of the specifications, and enabling smooth opening and closing of the canopy. This invention is ingeniously designed, simple in structure, and highly practical.

The utility model relates to the technical field of built-in shutters, and discloses a window sash slideway for a built-in shutter, which comprises a main body frame, the middle of the lower surface of the main body frame is fixedly connected with a mounting box, one side of the main body frame is fixedly connected with a slideway device, the top of the slideway device is fixedly connected with a top mounting box, and the top mounting box is fixedly connected with a bottom mounting box. And the bottom of the slideway device is fixedly connected with a bottom connecting plate. The slideway device is installed by arranging the main body frame, and the main body frame is a supporting structure of the window and can be used for fixing a slideway and a window sash. The window frame is made of firm and durable materials so as to ensure the overall stability of the window, and a sliding way on the sliding way device is a main part of a window sash sliding way and is usually made of metal or plastic. The fan blade is provided with a smooth surface and a sliding groove so that the fan blade can slide on the sliding groove conveniently, the design of the sliding way ensures that the fan blade can be opened and closed stably and smoothly, and appropriate sliding blocks are arranged on the fan blade so that the fan blade can be matched with the sliding way to achieve smooth sliding.

The application discloses a notebook computer screen hinge with adjustable torque and relates to the technical field of hinges.The hinge comprises a first page sheet, a shaft sleeve arranged on one side of the first page sheet, an ear seat arranged on one side of a second page sheet and a pin shaft penetrating the shaft sleeve and the ear seat, the shaft sleeve further comprises a first damping sheet sleeved on the outer wall of the pin shaft, a second damping sheet is sleeved on the outer wall of the pin shaft and is attached to the first damping sheet, a torque adjusting assembly is arranged in the shaft sleeve and is used for driving soft nails to push the first damping sheet based on oil extrusion so as to increase the friction between the first damping sheet and the second damping sheet, and a reset assembly is arranged in the shaft sleeve and is used for driving oil backflow based on spring reset so as to reduce the friction between the first damping sheet and the second damping sheet. Through the application, the problem that the damping sheets continuously rub against each other in the long-term repeated opening and closing process of the existing notebook hinge, the surface of the damping sheets may be gradually worn and become smooth along with the increase of the use time, and the friction coefficient is reduced is solved.

The utility model provides an improved steel structure single-leaf protective airtight door. The improved steel structure single-leaf protective airtight door comprises a door leaf body and a door frame. The door leaf body and the door frame are hinged through the hinge assembly, a first blade plate of the hinge assembly is fixedly connected with the door leaf body, a plurality of installation grooves are formed in the front side wall of the door frame, the sliding seats are fixedly installed in the corresponding installation grooves, and the front end faces of the sliding seats extend out of the front side end face of the door frame. The second blade plate is matched with the sliding seat and can freely slide back and forth along the moving direction of the sliding seat; a plurality of front and back positioning grooves are formed in the front side wall of the right side of the door frame; a plurality of positioning assemblies are arranged on the right side wall of the door leaf body, the left ends of transmission shafts of the positioning assemblies are fixed to the right side wall of the door leaf body, and the transmission shafts are sleeved with positioning rollers. The air-tight door is suitable for the installation environment where the door opening position is small or close to the corner of a building, the defect that a traditional protective air-tight door limits the thickness of a wall is overcome through translation of the door leaf body, and finally the rear end face of the door leaf body is flush with the plane of the wall.

The utility model provides a stainless steel integrated rubber magnetic strip installation structure which comprises a first glass door and a second glass door, and the first glass door comprises a first magnetic strip installation base, a first magnetic strip, a first stainless steel connecting piece and a first glass buckle piece. The second glass door comprises a second magnetic strip mounting seat, a second magnetic strip, a second stainless steel connecting piece and a second glass buckling piece; a first magnetic strip mounting seat body in the first glass door is provided with a hollow cavity, a second magnetic strip mounting seat body in the second glass door is almost of a solid structure (without a second magnetic strip mounting seat), and the hollow cavity and the second magnetic strip mounting seat body form a structural form that the hollow mounting seat and the solid mounting seat are matched. In this way, in the relative opening or closing process of the first glass door and the second glass door, due to the fact that the cavity of the first magnetic strip installation base body is of the hollow structure, when the first magnetic strip installation base body is extruded by the second magnetic strip installation base, formed resistance is smaller, opening or closing of the glass doors is smoother, and the experience feeling of a user is also improved.

The utility model relates to the technical field of pet baking food processing, and discloses a ball mold for processing pet baking food. The mold is composed of a base plate, a forming mechanism and an opening and closing mechanism. The forming mechanism comprises an upper die, a lower die, a limiting block, a bottom forming shell and a top forming shell, the upper die and the lower die are magnetically connected with the bottom forming shell and the top forming shell through rubidium magnets, spherical dies of different sizes can be conveniently and rapidly replaced, the universality and applicability of the dies are improved, and the forming quality of baked grains can be guaranteed. The opening and closing mechanism comprises a poke rod, an arc-shaped rack, a gear, a torsion spring and the like, the poke rod drives the arc-shaped rack to move, the gear rotates, the torsion spring stores and releases energy to assist the upper mold and the lower mold to be rapidly and smoothly separated or closed, an operator exerts force when closing the mold and does not need to exert force when opening the mold, time and labor are greatly saved, and the production efficiency of the round baked food is improved. Compared with a traditional mold, the mold solves the problems that the opening and closing efficiency is low and the size of the ball cannot be rapidly changed, and has remarkable advantages.

The utility model discloses an anti-pinch steel door which comprises a door frame and a door plate, a locking assembly is installed on the door plate, the locking assembly comprises a door lock and a handle, a rotating assembly is installed at the bottom of the door plate, the rotating assembly comprises a rotating shaft and a bearing, a rotating assembly is installed at the top of the door plate, and the rotating shaft is connected with the rotating assembly. The rotating assembly comprises a rotating plate and a clamping groove, the rotating plate is provided with a communicating assembly, the communicating assembly comprises a ball groove and an air hole, and the inner side of the ball groove is provided with a buffer assembly. According to the anti-pinch steel door, the two sides of the rotating plate can communicate with each other through the air hole, so that the rotating plate cannot be damped by air; the door plate is convenient for personnel to quickly close in emergency, so that the safety of indoor personnel and property is effectively guaranteed, the door plate is prevented from being quickly closed or opened, the situation that the door plate pinches hands or collides with a wall body is effectively prevented, the safety of the personnel, the door plate and the wall body is guaranteed, and the door plate is suitable for port installation and prevents hand pinching.

The utility model belongs to the technical field of window sash positioning and limiting supports, and particularly relates to an angle-adjustable limiting support which comprises a plug, a positioning mechanism and an angle adjusting mechanism, the positioning mechanism comprises a clamping spring, the clamping spring is movably installed in a bottom groove, the bottom groove is formed by arranging limiting sealing edges on the tops of supporting plates on the two sides, and the clamping spring is shaped like a Chinese character'fang '. The two side edges of the clamping spring are designed to protrude inwards, and a fixing hole is formed in the middle of the left end of the clamping spring. According to the angle-adjustable limiting support, through the design of the positioning mechanism, when a window sash is opened or closed, the sliding code enters or is pushed out of the clamping spring, the structure is convenient to operate, the knob does not need to be manually rotated, meanwhile, the clamping spring structure is adopted, and the positioning force can reach 40N through the structure by utilizing the two bosses and the straight body position of the clamping spring to collide with the wall of the bottom groove. The window sash is not easy to close under the action of external force, has a certain limiting effect, and can be smoothly closed under the operation of people.