70results about How to "Make sure to close" patented technology

The invention discloses a control method for preventing a direct current variable frequency air conditioner from accidentally shutting down due to low voltage. When the actual temperature of an air-conditioned room is lower than or equal to (the preset temperature -2 DEG C), an indoor ambient temperature sensor transmits the information to an outdoor control system through an indoor unit control system, and the outdoor control system sends out a command to start normal shutdown of an outdoor unit; when a direct current variable frequency compressor decreases in the frequency, the outdoor control system sends out a command to open an air bypass electromagnetic valve; after the direct current variable frequency compressor completes shutdown, the outdoor control system delays for 5 seconds to 20 seconds and sends a normal shutdown command to the indoor unit control system; the indoor unit control system commands an indoor electronic expansion valve to close; the indoor electronic expansion valve starts to close with the open degree reaching 0 pulse and continuously closes for 100 pulses to 300 pulses, so that the complete closedown of the indoor electronic expansion valve can be ensured; and after a delay of 30s to 120s, the air bypass electromagnetic valve is closed. The control method can efficiently prevent the direct current variable frequency air conditioner from accidentally shutting down due to the low voltage after the set temperature is achieved.

The invention relates to a method of controlling a smoke generator. The smoke generator is adapted to be connected to a supply of a pressurized gas and a supply of a smoke liquid and further comprises a valve to regulate the pressure of the gas, a fluid driving means, a mixing unit for mixing the smoke liquid and the gas, and a heat exchanger heating the mixture of the pressurized gas and the smoke liquid to vaporize the smoke liquid and form a smoke upon ejection into surrounding air. The control method according to the invention then comprises the steps of receiving a smoke density parameter indicative of a desired amount of smoke to be generated by the smoke generator, measuring a gas pressure at a position between the valve and the heat exchanger, and using these parameters in controlling the valve. The invention further relates to a smoke generator arranged for performing the control method.

The invention provides an electromagnetic under-voltage release comprising a filtering rectifying circuit, a sampling circuit, a power supply circuit, a control module, a driver module and an electromagnet. A direct-current resistance of a starting winding is less than a direct-current resistance of a working winding. According to the electromagnetic under-voltage release and the controlling method thereof, a microcomputer is used for controlling the control circuit, and the controlling thinking is clear and the circuit structure is simplified and ingenious. The starting winding-working winding dual-coil electromagnet is arranged at the circuit, and the direct-current resistance of the starting winding is less than the direct-current resistance of the working winding and the working current of the starting winding is high and the starting torque is large, so that the pull-in performance of the electromagnet can be ensured. And the working current of the working winding is low and thus the basic power for pull-in maintaining of the electromagnet is provided, so that the heating value is extremely low.

The invention belongs to the technical field of network, in particular to a method for turning off a camera on a webpage. The method comprises the following steps: a home station webpage is opened by a source user, a Flash plug-in module is loaded by the webpage, Flash calls a relevant API (Application Program Interface) to turn on the camera, a user clicks to turn off the relevant function of the camera or close the webpage and the like when needing to turn off the camera used by the webpage, the webpage adopts a circulation mode to wait that the camera state is changed into a success state, the API relevant to the Flash is called to turn off the camera, the camera state is changed into the turnoff success state after the camera is turned off, and the webpage automatically exits circulation wait and performs subsequent processing after detecting the turnoff success state. The method can be realized completely on the basis of the webpage without the support of a third-party application system, can effectively prevent the camera from being occupied without reasons, ensures the safety of user privacy, and is convenient, quick and efficient.

The invention discloses an electric locking-type out-swing door, in particular relates to an out-swing door for a passenger car. The electric locking-type out-swing door comprises an automobile door, a controller, a front lock (1), a rear lock (2), a central control lock (3), an inner handle (5), an outer handle (4), a door driving mechanism (6), a limiting stopper (7) and a door safety pin (8). The electric locking-type out-swing door can lock an automobile door smoothly by connecting the components mutually under the condition of the damage of an air cylinder or a motor, so that vehicles still can run normally and safely; the problem that automatic / manual switching is completed artificially in pneumatic and electric out-swing doors is solved, so that the automatic / manual switching is completed automatically; the safety factors in the running process of the automobiles are improved, and a button is pressed slightly by both passengers and drivers to open and close the door; the electric out-swing door has an anti-clamping function in the entire journey, so the injury to human bodies is avoided; and the door of the passenger car can be always closed to prevent the door from being closed by mistake.

The invention discloses a reset control method of an indoor unit electronic expansion valve of a multi-coupled air conditioner. The method is characterized in that whether the indoor unit electronic expansion valve is reset or not is judged, if yes, the next step is directly carried out, and if not, the indoor unit electronic expansion valve is closed with the maximum aperture and 100 steps, 80 steps are needed for opening, 80 steps are needed for closing, the indoor unit electronic expansion valve is marked as the reset, and then the next step is carried out; and after a multi-coupled air conditioner unit receives a starting instruction, whether the indoor unit electronic expansion valve needs to be started or not is judged, if yes, the indoor unit electronic expansion valve is started and the started indoor unit electronic expansion valve is marked as the non-reset, the multi-coupled air conditioner unit runs according to the starting instruction, and after a shutdown instruction is received, the indoor electronic expansion valve is closed with the current running aperture and 100 steps, and the closed indoor unit electronic expansion valve is marked as the reset. According to the method, it can be avoided that the adjusting frequency of the indoor unit electronic expansion valve is too high, and the number of adjusting steps is too large.

A fireproof hydraulic control device comprises a hollow column body connected to a hydraulic valve oil path, wherein a mounting seat is tightly connected with the upper end of the hollow column body; an encloser is arranged at the upper end of the mounting seat; a liquid inlet and a liquid outlet are arranged on the hollow column body; a valve core for sealing the liquid inlet and the liquid outlet is movably arranged in an inner cavity of the hollow column body; a movable guide rod is arranged in the mounting seat; a spring is supported between the movable guide rod and the valve core; a group of through holes are arranged on the wall of the encloser; a temperature sensing glass ball is arranged inside the encloser; one end of the temperature sensing glass ball abuts against the movable guide rod; and the other end of the temperature sensing glass ball abuts against the inner end face of the encloser. The control device can effectively control on / off of the oil path of the hydraulic valve if a fire hazard occurs all around when the fireproof hydraulic control device is applied to the environments of petroleum, gas and other inflammable and explosive articles. The hydraulic valve is enabled to be opened or closed in an extremely short time, so that an accident is further avoided. The fireproof hydraulic control device is small in size, convenient to install, strong in anti-pollution capacity, high in sensitivity, fast in response, high in stability, safe and reliable, can be repeatedly used and is worth popularizing.

The invention discloses a gate opening and closing device. According to the technical scheme, the gate opening and closing device comprises a dam body, a drainage channel is formed in the lower end ofthe dam body, and a gate for opening and closing the drainage channel is longitudinally arranged on the dam body in a sliding manner; and opening and closing equipment for controlling the gate to longitudinally reciprocate is mounted on the gate opening and closing device. The gate opening and closing device is characterized in that an opening and closing beam is fixed above the gate, and the opening and closing equipment comprises a winch and traction mechanisms which are used for connecting the winch and the gate and are correspondingly mounted on two sides of the gate, wherein the winch ismounted above the dam body; and each traction mechanism comprises a first traction part used for pulling the gate upwards and a second traction part used for helping the gate to be closed. Accordingto the gate opening and closing device, the problem that the gate cannot be completely closed by means of self weight is effectively solved, and the safety performance of the dam body is improved.

The invention relates to the technical field of squatting pans, in particular to a blocking body for a sewage outlet of the squatting pan. A technical key point is that the invention puts forward the following improvement: the blocking body for the sewage outlet of the squatting pan comprises an upper weight balancing body and a lower enclosing body which are connected with each other through a rope; when the sewage outlet is enclosed, a gap is reserved between the weight balancing body and the enclosing body and the rope between the weight balancing body and the enclosing body is loose; the rope between the weight balancing body and a fan-shaped oscillating arm is tightened; and the pulling force of the tightened rope acts on the outer edge of the fan-shaped oscillating arm to produce torque on a valve mandrel so as to ensure that the valve is fully closed. The invention also discloses two detail designs: (1) the enclosing body, the weight balancing body and the fan-shaped oscillating arm are sequentially connected by one rope, the rope is fastened through a fastening bolt provided with a hole and a screw hole on the weight balancing body and is partitioned into two sections, and when the sewage outlet is in an enclosed state, a lower section of the rope is loose, while an upper section is fastened; and (2) under the condition that an anti-odor overflow device is arranged in the enclosed body, the top of the enclosing body is provided with a thin-wall cavity.

The invention discloses an overturning folding rail for a receiving hot cell, and can be used for design and application of an overturning folding rail in an open radiation laboratory or a reactor auxiliary facility, which is used in the process transportation process of entering and exiting the receiving hot cell by using a lead jar as a container for loading a radioactive substance. The overturning folding rail can organically combine process transportation of the radioactive substance in the hot cell, transshipment and receiving of the lead jar and radiation protection of the hot cell, so that a lead jar transport vehicle can easily enter and exit the hot cell, and on the basis of transportation continuity, optimization of space usage and protection of ionization radiation are ensured. The overturning folding rail has high universality when being applied to the open radiation laboratory or the reactor auxiliary facility, has functions of transshiping and receiving various radioactive substance, can optimize adaptability of process transportation and architectural layout of the facility, and finally obtains technical innovations on the process transportation and good economic benefits.

The invention discloses a synchronous rectifier used for a power converter and an operation method of the synchronous rectifier. The synchronous rectifier comprises a gate coupling effect suppression unit, wherein the gate coupling effect suppression unit is used for suppressing induced voltage of a gate of a metal oxide semiconductor transistor coupled to a secondary side of the power converter to ensure that the metal oxide semiconductor transistor is closed when the power converter is started and a power switch at a primary side of the power converter is turned on, wherein drive voltage, for driving the synchronous rectifier, of the secondary side is not enough to drive the synchronous rectifier when the power converter is started, therefore, the condition that the metal oxide semiconductor transistor is closed can be ensured when the power converter is started and the power switch is turned on; the primary side and the secondary side can be prevented from being simultaneously conducted; and the condition that the power converter cannot be started or is broken can be avoided.

The invention provides a refrigerator door opening and closing control method based on angle and angular velocity, computer readable storage media and a refrigerator. The method comprises the steps that angle and angular velocity data of a refrigerator door are detected in real time, the opening and closing state of the refrigerator door is judged by analyzing the angle and the angular velocity, amotor is controlled to operate according to the opening and closing state of the refrigerator door, and therefore the speed of the refrigerator door is controlled. According to the refrigerator dooropening and closing control method based on the angle and the angular velocity, the computer readable storage media and the refrigerator, the angle and the angular velocity are judged, and the motor is intervened in the closing process of the refrigerator door, so that the secondary spring opening of the refrigerator door and the toppling of objects in the refrigerator caused by excessive force are avoided, and the refrigerator door are ensured to be stably closed.

The invention relates to an intrinsic safety type fire-proof and explosion-proof electro-hydraulic actuator and a control method thereof. The intrinsic safety type fire-proof and explosion-proof electro-hydraulic actuator and the control method thereof are used for controlling an intercepting valve to be opened or closed. The intrinsic safety type fire-proof and explosion-proof electro-hydraulic actuator comprises an actuator body, an actuating mechanism and a hydraulic control unit. The actuating mechanism and the hydraulic control unit are arranged on the actuator body; the actuating mechanism comprises a hydraulic cylinder used for being connected with the intercepting valve, and the hydraulic control unit is communicated with the hydraulic cylinder; the hydraulic control unit comprises a pump control branch and a hydraulic control branch, and the pump control branch and the hydraulic control branch are connected in parallel and communicated with the hydraulic cylinder; the pump control branch comprises a hydraulic pump and an electronic control system, the hydraulic control branch comprises an energy accumulator, a first temperature control valve, a second temperature control valve and an oil tank, and the energy accumulator, the first temperature control valve, the hydraulic cylinder, the second temperature control valve and the oil tank are sequentially communicated in series. The control method is used for controlling the electro-hydraulic actuator to work to guarantee safety. The intrinsic safety type fire-proof and explosion-proof electro-hydraulic actuator has the advantages of being high in safety, simple in structure and convenient to maintain.

The invention belongs to the technical field of networks, in particular relates to a method for closing a camera, comprising the following steps: a source user opens a home webpage, the webpage uploads a Flash insert, Flash calls related APIs (Application Program Interfaces) to open the camera, the user clicks to execute operations such as closing related functions of the camera or closing the webpage and the like when requiring closing operation of the camera in webpage use, the webpage waits for successful state alteration of the camera in a circulating way, related APIs of the Flash are called to carry out closing treatment on the camera, the successful closing state is altered after the closing is successful, and after the state of the webpage is detected, the webpage automatically quits circulation to wait for following treatment, thereby closing the camera. The method can be completely realized based on the webpage without the support of a third part application system, can be used for effectively preventing the camera from being occupied without reasons and ensuring the safety of the privacy of the user and is convenient, rapid and efficient.

The invention relates to the field of clamping and positioning equipment, in particular to a rectangular workpiece automatic positioning clamping device, which comprises a support plate, wherein a material carrying tray is arranged on the support plate; a moving device is arranged on the lower surface of the support plate; the two ends of the moving device are connected with fixing plates; the two ends of the fixing plate are provided with clamping devices matched with rectangular workpieces; the symmetrical centers of the two fixing plates are positioned on the same vertical line as the symmetrical center of the material carrying tray; the moving device is a power device capable of opening or closing the two fixing plates at the same speed. The two fixing plates capable of being outwards opened or inwards closed up at the same speed are used; meanwhile, the two fixing plates are symmetrical by using the center of the tray as the symmetrical center; the two ends of the two fixing plates are provided with the clamping devices; through the four clamping devices, the workpieces can be tightly clamped; further, the tightly clamped workpiece center and the center of the tray are further enabled to be corresponding to each other; the influence of the subsequent processing on the workpiee precision can be reduced.

The invention discloses an automatic steel fireproof roller shutter. The automatic steel fireproof roller shutter comprises a guide rail, shutter plates, a shutter rolling machine, a roller shutter controller, a scroll and a spraying system. The shutter plates are connected in series into a door curtain and mounted in the fixed guide rail. The upper end of the door curtain is connected with the horizontally arranged scroll and rotates around the central axis of the scroll to open and close the roller shutter up and down. The spraying system comprises a spraying pipe and an electromagnetic valve. The electromagnetic valve is electrically connected with the roller shutter controller. The spraying pipe is arranged horizontally or obliquely and arranged on one side of the door curtain. The electromagnetic valve is arranged at one end of the spraying pipe. The spraying pipe is provided with a plurality of spraying holes towards the door curtain. The further improvements are that a spot type photoelectric smoke sensing fire detector, a spot type temperature sensing fire detector and a temperature control release device are further included and electrically connected with the roller shutter controller, and the temperature control release device is electrically connected with the shutter rolling machine. The automatic steel fireproof roller shutter can be automatically closed during fires and is not deformed and damaged in the high temperature environment.

The invention relates to a control device for a gas-extracting pipeline. A valve base with two opened ends is arranged in an inner cavity of a valve body; a through hole formed at one end of the valve body is communicated with the inner cavity of the valve body; the through hole formed at the other end of the valve body is communicated with the valve base; a base body is linked with the valve base; a nut is fixed in the base body; a screw rod passes through the base body and is matched with the nut; the lower end of the screw rod is inserted into the valve body and is connected to a valve core; the valve core is aligned with an opening at the lower end of the valve base; and the upper part of the screw rod is in transmission match with a control mechanism. The control device for the gas-extracting pipeline is mounted on a branch pipe for extracting the gas; when the gas density in one branch pipe is lower, the control mechanism controls the valve core to close the opening at the lower end of the valve base so as to separate the branch pipe; and when the gas density in the branch pipe is higher, the control mechanism controls the valve core to lift so as to conduct the branch pipe. The control device provided by the invention can be used for promoting the efficiency of a pumping system and greatly prolonging the service life of a pumping device.

The invention discloses a reset control method of an indoor unit electronic expansion valve of a multi-coupled air conditioner. The method is characterized in that whether the indoor unit electronic expansion valve is reset or not is judged, if yes, the next step is directly carried out, and if not, the indoor unit electronic expansion valve is closed with the maximum aperture and 100 steps, 80 steps are needed for opening, 80 steps are needed for closing, the indoor unit electronic expansion valve is marked as the reset, and then the next step is carried out; and after a multi-coupled air conditioner unit receives a starting instruction, whether the indoor unit electronic expansion valve needs to be started or not is judged, if yes, the indoor unit electronic expansion valve is started and the started indoor unit electronic expansion valve is marked as the non-reset, the multi-coupled air conditioner unit runs according to the starting instruction, and after a shutdown instruction is received, the indoor electronic expansion valve is closed with the current running aperture and 100 steps, and the closed indoor unit electronic expansion valve is marked as the reset. According to the method, it can be avoided that the adjusting frequency of the indoor unit electronic expansion valve is too high, and the number of adjusting steps is too large.

The invention discloses an induction type double-layer fireproof roller shutter. The induction type double-layer fireproof roller shutter comprises a guide rail, shutter surfaces, a shutter rolling machine, a roller shutter controller, scrolls, a box body and a plurality of steel wire ropes. The shutter surfaces are hung down and mounted in the fixed guide rail. The steel wire ropes are vertically arranged and connected to the side faces of the shutter surfaces or are mounted in the shutter surfaces. The upper ends of the steel wire ropes are connected with the scrolls and rotate around the central axes of the scrolls to open and close the roller shutter up and down. The roller shutter controller is arranged outside the box body. The two parallel shutter surface layers are arranged in a spaced mode, the scrolls on the shutter surface layers are arranged in parallel, and the shutter rolling machine is arranged on the same sides of the two scrolls and drives the two scrolls to rotate in the same direction. The further improvements are that the shutter surfaces are formed by compositing fireproof glass fiber decoration cloth, fireproof cloth, fireproof shutter swung fireproof blanket and fireproof aluminum foil cloth in sequence, and a spot type photoelectric smoke sensing fire detector, a spot type temperature sensing fire detector and a temperature control release device are further arranged. The induction type double-layer fireproof roller shutter can be automatically closed during fires and is low in weight and good in fireproof effect.

The invention relates to the technical field of squatting pans, in particular to a blocking body for a sewage outlet of the squatting pan. A technical key point is that the invention puts forward the following improvement: the blocking body for the sewage outlet of the squatting pan comprises an upper weight balancing body and a lower enclosing body which are connected with each other through a rope; when the sewage outlet is enclosed, a gap is reserved between the weight balancing body and the enclosing body and the rope between the weight balancing body and the enclosing body is loose; the rope between the weight balancing body and a fan-shaped oscillating arm is tightened; and the pulling force of the tightened rope acts on the outer edge of the fan-shaped oscillating arm to produce torque on a valve mandrel so as to ensure that the valve is fully closed. The invention also discloses two detail designs: (1) the enclosing body, the weight balancing body and the fan-shaped oscillating arm are sequentially connected by one rope, the rope is fastened through a fastening bolt provided with a hole and a screw hole on the weight balancing body and is partitioned into two sections, and when the sewage outlet is in an enclosed state, a lower section of the rope is loose, while an upper section is fastened; and (2) under the condition that an anti-odor overflow device is arranged in the enclosed body, the top of the enclosing body is provided with a thin-wall cavity.

The invention discloses an eccentric ball valve. The valve rod rotary center line and the valve core spherical center line are eccentrically arranged, share the same surface with the flow pass centerline and are perpendicular to the flow pass center line. When a valve core and a valve seat are in a closed state, a sealed surface is formed between the surfaces, making contact with each other, of the valve core and the valve seat, and the center line of the sealed surface and the flow pass center line are eccentrically arranged. In the prior art, eccentricity of the flow pass center line and the valve rod rotary center line are shifted to eccentricity of the sealed surface center line and the flow pass center line, when the eccentric ball valve is machined, a valve cover and a valve body donot need to be subjected to eccentric treatment on the vertical axis, and only the sealed surface needs to be subjected to eccentric treatment, so that the machining difficulty and manufacturing costof the eccentric ball valve are reduced, and the machining precision is improved; and when the eccentric ball valve is assembled, a valve rod and the valve core can be easier to mount in place in a flow pass, and the sealing property between the valve core and the valve seat is ensured.

The invention discloses a filtering and impurity removing device for municipal sewage. The filtering and impurity removing device comprises a sewage pipe, a water outlet pipe, a sewage pool, an impurity pool, a walking device, a lifting device and a filtering basket. The device is characterized in that the filtering basket comprises a lifting rod, a connecting rod, a rotating shaft and a basket body; the basket body is provided with a left side plate capable of being automatically opened and closed; the upper part of the sewage pool is provided with an inclined opening matched with the filtering basket in shape; when the filtering basket descends, the middle upper parts of the left side plate and a right side plate are attached to a left inclined side wall and a right inclined side wall ofthe inclined opening, and the middle lower part of the filtering basket is positioned below the inclined opening. Compared with the prior art, the device has the advantages that filtering effect is good, impurities are convenient to dump, and a structure is ingenious; the impurities in sewage can be filtered out in time, and centralized treatment is facilitated after the impurities enter the sundry pool; the sewage pumped out of the sewage pool is cleaner compared with the prior art; and the burden of subsequent procedures (such as overflowing) can be effectively reduced.

The invention discloses an electric locking-type out-swing door, in particular relates to an out-swing door for a passenger car. The electric locking-type out-swing door comprises an automobile door, a controller, a front lock (1), a rear lock (2), a central control lock (3), an inner handle (5), an outer handle (4), a door driving mechanism (6), a limiting stopper (7) and a door safety pin (8). The electric locking-type out-swing door can lock an automobile door smoothly by connecting the components mutually under the condition of the damage of an air cylinder or a motor, so that vehicles still can run normally and safely; the problem that automatic / manual switching is completed artificially in pneumatic and electric out-swing doors is solved, so that the automatic / manual switching is completed automatically; the safety factors in the running process of the automobiles are improved, and a button is pressed slightly by both passengers and drivers to open and close the door; the electric out-swing door has an anti-clamping function in the entire journey, so the injury to human bodies is avoided; and the door of the passenger car can be always closed to prevent the door from being closed by mistake.

The embodiment of the invention provides a water quenching car and a control method thereof, and relates to the technical field of coking. The water quenching car comprises a carriage and the abnormal opening prevention device, wherein the carriage comprises a carriage door and a carriage wall which are connected with each other; the abnormal opening prevention device comprises a connecting plate, an electric-hydraulic push rod and a locking frame, the connecting plate is connected to the compartment door, a lock hole is formed in the connecting plate, the locking frame is connected to the compartment wall, and a telescopic rod of the electric-hydraulic push rod is used for penetrating through the lock hole and being inserted into the locking frame so as to prevent the compartment door from being opened abnormally. Thus, an abnormal opening prevention device is additionally arranged, after pressure is insufficient due to pressure relief of a transmission pipeline and under the condition that the compartment door is extremely easy to open under the impact of high-pressure water, the abnormal opening prevention device is started, a telescopic rod of an electric-hydraulic push rod penetrates through a lock hole and is inserted into a locking frame, so that the compartment door is prevented from being opened abnormally, and the compartment door does not act in the water quenching tower; and the carriage door is always closed.

The invention discloses a valve core, a valve using the valve core and a method thereof. The valve core includes a valve ball, a transmission rod, a damping gear and a steering clamping device. One end of the transmission rod is connected to the valve ball, and the other end is connected to the damping gear. , the valve includes a valve body, a casing and a joystick, the casing is installed on one side of the valve body, the bottom end of the joystick protrudes into the casing, and one end of the transmission rod is also placed in the casing, and is flexibly connected with the joystick. When the lever swings clockwise, the resistance is provided by the damping gear, so that the instantaneous swing range of the joystick is low, which is convenient for adjusting the flow rate. When the flow rate is directly adjusted from off to maximum, just swing the joystick counterclockwise. 0‑±90°, easy to adjust and high efficiency.

The invention relates to a quantitative rock soil ore loading station, which is a device capable of loading bulk cargos into a railway wagon by a hopper. The quantitative geotechnical ore loading station comprises a steel structure frame, and a conveying belt machine head arranged at the topmost end of the steel structure frame, wherein a buffer bin with a double-wing radial gate, which is arranged on the steel structure frame, is arranged below the conveying belt machine head, and a quantitative bin with a double-wing radial gate, which is connected with the steel structure frame by a weighing device, is arranged below the buffer bin; and a swing type chute with a radial gate, which is arranged on the steel structure frame, is arranged below the quantitative bin, and an anti-wear gratingis respectively arranged on the inner walls of the oblique bin plates of the buffer bin and the quantitative bin. The anti-wear gratings allow the gratings in the bin wall plates to be filled with materials after loading and protect the bin wall plates, and the curvilinear motion formed by the closing of the swing type radial gate can effectively prevent large-particle materials from being stuck and ensure the closing of the gate; and the swing type chute with the radial gate can effectively control rock soil material flow and prevent the rock soil from vertically falling down to cause too great impact on the wagon.

The invention discloses a dustproof and accumulated-water-proof air door for a coal mine main ventilation system, and relates to the technical field of mine ventilation equipment. The dustproof and accumulated-water-proof air door for the coal mine main ventilation system is characterized in that a side-opening air door is arranged in an air passage, and a plurality of traveling wheels are arranged at the top of the air door; a rack with the tooth surface facing downwards is arranged at the bottom of the side-opening air door, and an air door external box body is rotationally connected with a tail gear engaged with the rack; the tail gear is connected with a transmission device used for driving the side-opening air door to move in a horizontal reciprocating mode; a dustproof device is arranged on the inner side of the bottom of the air door external box body, and a manual driving device for driving a dustproof shaft to rotate is arranged in a transmission box; and a drainage device is arranged at the bottom of the air door external box body and comprises a drainage groove and a drainage groove eddy current heating device. The problems that as for an existing air door, dust is accumulated and is difficult to clear, and accumulated water is not prone to being discharged are solved.