113results about How to "Turn on the implementation" patented technology

The invention discloses a gas injection point retreating type coal underground gasification system and process. The gas injection point retreating type coal underground gasification system comprises an airway arranged in a coal layer and multiple coal underground gasification units, wherein the airway is connected to the multiple coal underground gasification units; and the technical steps are sequentially as follows: a step of cold-state testing, a step of ignition on a gasification working surface, a step of debugging of the gasification working surface and a step of gasification normal production process. According to the invention, mud can be prevented from blocking the gas injection point efficiently, and the coal layer can be exploited to the maximum extent, so that possibility of thoroughly cutting off the leakage of a gasification agent to a combustion space area is realized while safe retreating in the coal underground gasification process is realized, filling of the combustion space area is realized, collapse of the ground surface caused by the gasification is removed, stability of the gasification channel structure is guaranteed, problem of the short circuit of the gasification agent caused by a channel which is resulted from collapse of a coal layer plate in the gasification area in the early stage and the gasification channel at the later stage of the underground gasification is solved, the quality of the coal gas is improved, and safe and reliable coal gas production and high gasification rate are achieved.

The invention provides a cooking appliance with a steam cooking function and a drying control method, relates to the technical field of household appliances, and aims to solve the problems that in theprior art, a cooking appliance with the steam cooking function is low in drying efficiency, and more energy is wasted in the drying process. The cooking appliance comprises a shell, a door, a humidity sensor, a steam generator in an inner container, a water discharging pipe, a water supply pipe, a heated air circulation device, an air discharging outlet and a controller, wherein the water discharging pipe and the water supply pipe are communicated with the steam generator; the heated air circulation device is used for cyclically heating air flow in the inner container; the air discharging outlet is used for discharging high-temperature steam in the drying process; the steam generator is provided with heaters, the heaters separately work, and the powers of the heaters are different. The drying control method is used for drying the inner container of the cooking appliance. According to the cooking appliance with the steam cooking function and the drying control method, it is not required that residual water is dried, the drying time is effectively shortened, and less energy is wasted.

The invention discloses a vehicle-mounted multifunctional platform of an unmanned aerial vehicle. The vehicle-mounted multifunctional platform of the unmanned aerial vehicle comprises a multifunctional platform bin detachably connected with a roof of the vehicle. A movable bin door is arranged on the top of the multifunctional platform bin and connected with the side wall of the multifunctional platform bin through a bin door control mechanism. A plurality of undercarriage lock control mechanisms are arranged at the bottom of the multifunctional platform bin. The bin door control mechanism and the undercarriage lock control mechanisms are connected with a control circuit board through data lines. The control circuit board is connected with a power source through an external power connection line and connected with a remote control operation terminal via electric signals. The vehicle-mounted multifunctional platform of the unmanned aerial vehicle has the characteristics that the unmanned aerial vehicle can fly at any time, assembling is not needed, the vehicle-mounted multifunctional platform is convenient to carry and transport and can be fixed to a luggage carrier on the roof, all-weather storage is achieved, and the platform can contain a plurality of unmanned aerial vehicles; a controller can follow the unmanned aerial vehicle after the unmanned aerial vehicle takes a flight, the unmanned aerial vehicle can fly by the maximum distance and then land automatically in a specific location, and the unmanned aerial vehicle can be charged in time when not taking a flight.

The invention relates to a multi-stage fracturing sliding sleeve device and a using method thereof. The multi-stage fracturing sliding sleeve device is characterized by comprising an upper pipe column joint, a sleeve body, a lower pipe column joint, a switch sleeve and a reducing tee, wherein the lower part of the upper pipe column joint is connected with the upper part of the sleeve body; the lower part of the sleeve body is connected with the upper part of the lower pipe column joint; the sleeve body is in a circular barrel shape; a plurality of side holes are formed at the circumference near the upper position of the sleeve body at intervals; a circle of steps are formed at the inner side near to the lower position of the sleeve body; the switch sleeve which is also in a circular barrel shape is arranged in the sleeve body and below the upper pipe column joint and is fixed with the sleeve body through a plurality of pins; the inner diameter of the lower part of the switch sleeve is larger than that of the upper part of the switch sleeve; the reducing tee is arranged at the inner lower part of the switch sleeve; the circumference of the upper part of the reducing tee is fixedly connected with the switch sleeve through the plurality of pins; a plurality of cutting slits are formed at the lower part of the reducing tee; sealing mediums are filled in each cutting slit; the top of the lower pipe column joint is in a taper shape; a circle of steps bulging inwards are arranged at the bottom of the reducing tee, and the outer diameter of the top of the lower pipe column joint is smaller than that of the bottom of the reducing tee.

The invention provides a radio transceiver test shielding box comprising a test box, a low frequency electric cable, a high frequency electric cable, a coupling cover, an inner box body, a box cover, a pull rope, a pulley wheel, a support rack, a hinge and an installation seat, wherein the inner box body is fixed at a central position of an inner part of the test box via box feet, the central position of an inner part of the inner box body is provided with a transceiver to be tested, the transceiver is fixed on the installation seat, and a front end side face of the test box is provided with a lead-out hole; the low frequency electric cable is led out from a front end, facing toward the lead-out hole, of the transceiver; the low frequency electric cable is led out from the test box after orderly running through the installation seat and the lead-out hole; the installation seat is fixed at a middle part of a side face, facing toward the lead-out hole, of the inner box body after running through the same. Via the radio transceiver test shielding box, test indexes of a complete radio transceiver can be prevented from being affected by microwave leakage signals after the microwave leakage signals are reflected via surrounding environment, and a problem that the complete radio transceiver cannot be precisely tested during temperature test operation can be solved.

The invention discloses a cabinet door locking device with an emergency opening function, comprising a lockset and a cabinet door locking / unlocking device, wherein the lockset comprises a lock body and a locking dog locked / unlocked with the lock body; the cabinet door locking / unlocking device comprises an external locking / unlocking device and an emergency unlocking device; the external locking / unlocking device comprises an external handle, a linking arm, a linking plate, a latch fixed plate and a lockset elastic pre-locking device; a rotating shaft of the external handle, the linking arm, the linking plate, the latch fixed plate and the lockset elastic pre-locking device are connected in a linking manner; the emergency unlocking device comprises a circular lining plate, a square linking plate, an emergency rotating shaft, a rotating shaft driving device and a connecting tension spring in a linking manner; and the rotating shaft driving device, the emergency rotating shaft, the square linking plate, the circular linking plate, the connecting tension spring and the lockset elastic pre-closing device are connected in a linking manner. Therefore, with the scheme, the emergency opening of the cabinet door can be realized by using the emergency unlocking device and the phenomenon that the cabinet door cannot be opened due to the self-locking of the lockset can be avoided.

The invention discloses a gas injection point retreating type coal underground gasification system and process. The gas injection point retreating type coal underground gasification system comprises an airway arranged in a coal layer and multiple coal underground gasification units, wherein the airway is connected to the multiple coal underground gasification units; and the technical steps are sequentially as follows: a step of cold-state testing, a step of ignition on a gasification working surface, a step of debugging of the gasification working surface and a step of gasification normal production process. According to the invention, mud can be prevented from blocking the gas injection point efficiently, and the coal layer can be exploited to the maximum extent, so that possibility of thoroughly cutting off the leakage of a gasification agent to a combustion space area is realized while safe retreating in the coal underground gasification process is realized, filling of the combustion space area is realized, collapse of the ground surface caused by the gasification is removed, stability of the gasification channel structure is guaranteed, problem of the short circuit of the gasification agent caused by a channel which is resulted from collapse of a coal layer plate in the gasification area in the early stage and the gasification channel at the later stage of the underground gasification is solved, the quality of the coal gas is improved, and safe and reliable coal gas production and high gasification rate are achieved.

The invention discloses a surface acoustic wave controlled shape memory alloy microvalve and a control method thereof. The microvalve comprises a PCB with a mounting cavity, a signal generation device, a piezoelectric substrate embedded between two side cavity walls of the mounting cavity, a PDMS freezing body connected to a second end cavity wall of the mounting cavity and provided with a microchannel, a shape memory alloy wire slightly bent, and a rigid bent strip; two symmetric interdigital transducers are arranged on the working surface of the piezoelectric substrate; the shape memory alloy wire is transversely spanned on a surface acoustic wave propagation path between the two inerdigital transducers, and one section is covered by paraffin oil microliquid; one end of the shape memory alloy wire is connected with a first end cavity wall of the mounting cavity; one end of the rigid bent strip is connected with the other end of the shape memory alloy wire, and the other end is connected with any one side cavity wall of the mounting cavity; and a convex extrusion part of the rigid bent strip is aligned to the other side wall of the PDMS freezing body. The microvalve has the advantages of simple structure, small size, easy to integrate and capable of being applied to a piezoelectric microflow chip for microflow control operation.

The invention discloses a special-type intelligent door dual-system control device, and the device comprises the commercial power, a switching power supply, a standby power supply, a commercial powerdetection device, an access controller and an electronic lock. The access controller comprises a controller CPU, and the commercial power detection device comprises a low voltage conversion unit. Theaccess controller further comprises an IGBT dual-power switching unit, an alarm unit and a remote communication unit. The IGBT dual-power switching unit comprises an IGBT electronic switching switch,which greatly improves the commercial power compared with the switching speed of a relay, thereby improving the switching speed of the commercial power and the standby power supply, and truly achieving the uninterrupted supply of the power supply. The device is short in switching time, is high in reliability, has no problem of switching sparks, and is very good in application prospect, can achievethe starting of an electronic lock remotely through the access controller, achieves the remote control of the opening of the door and the emergency opening of the access control system in case of emergency power failures. When the fire or extreme danger occurs, the ambulance personnel can perform the emergency opening without approaching.

The invention provides a hand-held dust collector capable of opening a dust cup and a cup cover by one key. The hand-held dust collector comprises a dust collector host and the dust cup; one end of the dust collector host extends outwards to form a holding handle; the other end of the dust collector host extends outwards to form a dust cup connection part; a first latch is arranged on the dust cupconnection part; a first groove is formed on an assembling face of the dust cup; a second latch is arranged at the air inlet end on the dust cup; the first latch hooks the first groove; the dust cupis fixedly connected with a rotation shaft; the rotation shaft is rotationally connected with the cup cover; the cup cover is provided with a second groove; the second latch hooks the second groove; atoggle part is arranged on the surface of the dust collector host; the bottom of the toggle part is connected with a driving rod; one end of the driving rod pushes or pulls the first latch; and the other end of the driving rod pushes or pulls the second latch. Compared to the prior art, the hand-held dust collector can implement one-key opening of the dust cup and the cup cover so as to fulfill the aims of reducing the number of buttons and more conveniently operating.

The invention discloses an electrical cabinet. The electrical cabinet is characterized by comprising an electrical cabinet body, a door handle device fixedly arranged in the electrical cabinet body, aconstant temperature sealing device fixedly arranged in the electrical cabinet body and an electrical cabinet door rotation device fixedly arranged in the electrical cabinet body; and the door handledevice comprises an electrical cabinet storage groove, wherein the electrical cabinet storage groove is fixedly formed in the electrical cabinet body and an opening of the electrical cabinet storagegroove is forward, a rotatable electrical cabinet door is fixedly arranged in the electrical cabinet storage groove, and a first electrical cabinet door handle is fixedly arranged at the position slant to the left side of the front end of the electrical cabinet door. The electrical cabinet is simple in structure and subtle in design, and the constant temperature sealing device solves the problem of difficult opening of the electrical cabinet; and meanwhile, novel internal rotary door structural design is adopted, the occupied space gets much smaller during using, and the integral space utilization rate is improved.

The embodiment of the invention provides a safety protection method and device and access network equipment, relates to the technical field of communication, and is used for solving the problem that the safety protection of a user plane cannot be started as required in the prior art. The method comprises the following steps: the first access network device receives a first message from a second access network device, wherein the first message carries a user plane security policy; the user plane security policy is used for indicating user plane security protection type to be started of the first access network device, and the first access network device determines a user plane security algorithm and a user plane key corresponding to the user plane security algorithm according to the user plane security strategy if the first access network device can identify the user plane security protection type to be started; or, if the first access network device cannot identify the user plane security protection type to be started, the first access network device selects a default user plane security algorithm and determines a user plane key corresponding to the default user plane security algorithm.

The invention discloses a method and a device for controlling Miracast function of an intelligent display device. The method comprises the steps of triggering a state machine configured by a middleware to jump into a Miracast enabling waiting state based on the received Miracast function enabling instruction which is sent by the application layer of the intelligent display device, wherein the Miracast function enabling instruction is used for triggering to enable the Miracast function of the intelligent display device; calling an interface of a local method layer configured by the middleware to disenable the WIFI network function of the intelligent display device through a WIFI network function disenabling instruction output in the Miracast enabling waiting state; jumping into a Miracast enabling state when the WIFI network function is disenabled; and calling the interface of the local method layer configured by the middleware to enable the Miracast function of the intelligent display device through the Miracast function enabling instruction output in the Miracast enabling state. The technical scheme provided by the invention avoids communication signal conflicts and improves the function response speed.

The application of the invention discloses a control method of automobile components. The control method comprises the following steps of judging whether the automobile state meets the control condition set in accordance with an automobile door electronic lock of an automobile or not; if yes, controlling the automobile to enter an energy saving state; controlling an air-conditioning device of the automobile to be under a working state; and after an electrical signal outputted by a sensor arranged on the automobile is received, awakening the automobile door electronic lock, and when a designed event occurs, controlling the automobile door electronic lock of the automobile to remove the locking state of the automobile door. Through the adoption of the control method disclosed by the invention, the problem that the safety of a person in the locked automobile cannot be effectively guaranteed existing in the prior art is solved. The application of the invention also discloses a control device of the automobile components and the automobile.

The invention discloses a working station for a transaction system, and a working method and material loading and unloading methods thereof, which relate to the field of pipe transmission and are invented for making it convenient to load and unload materials in the working station for a pneumatic pipe transmission system. The working station for the transaction system comprises a conveying pipe, and is characterized in that: the port on one end of the pipe is hinged with a container or elastically connected with the container; the container is symmetric about a hinge or an elastic element, or the container is centrosymmetric about a hinged point or the elastic element; and one end of the container has an opening, and the opening of the container is matched with the port of the pipe.

The invention discloses a method for achieving a cipher lock, and solves the problems that conventional mechanical locks and cipher locks are inconvenient and expensive. The method is characterized in that a main controller and a driving mechanism are connected together and arranged on a lock; the driving mechanism is used to drive the spring bolt of the lock to move; the user is provided with a mobile controller with a power supply, the cipher information is stored in the mobile controller, and the mobile controller is connected to the main controller through a USB data line to achieve data interaction and power transmission. The method comprises the following steps: (1) the mobile controller and the main controller is connected through a USB data line, and the mobile controller sends cipher information to the main controller through the USB data line; (2) after the main controller receives the cipher information, the main controller judges whether the cipher information is matched or nor, and if the result is positive, the next step is carried out; (3) the mobile controller transmits electrical power to the main controller through the USB data line; (4) the main controller transmits electrical power to the driving mechanism, and the driving mechanism drives the spring bolt of a lock to move so as to unlock the lock.

The invention discloses a high-voltage board safety door. The high-voltage board safety door comprises a blocking rod arranged in front of a door body and used for preventing the door body from being opened. The high-voltage board safety door further comprises an installation plate arranged on one side of the door body, a lock cylinder fixedly connected with the outer side of the installation plate and an interlocking rod covering plate connected with one end of the blocking rod, wherein the installation plate is provided with a U-shaped groove used for supporting the blocking rod; the interlocking rod covering plate is arranged on the outer side of the installation plate and the lock cylinder and fixedly connected with the installation plate; the interlocking rod covering plate is provided with a key hole through which a key used for opening the lock cylinder can penetrate; the interlocking rod covering plate is provided with a bent edge, and the bent edge is provided with a spring bolt hole through which a spring bolt of the lock cylinder can penetrate. In addition, the invention discloses a locomotive comprising the high-voltage board safety door. According to the high-voltage board safety door, when the door body is opened, the key is still located on the lock cylinder, and therefore the key is prevented from being lost or damaged.

The invention provides a multifunctional projector, which comprises a projection module, a storage device, a video and audio playing module and a document opening module, wherein the storage device is used for storing a video and audio file and a document; the video and audio playing module is used for reading the video and audio file in the storage device and playing the video and audio file; the document opening module is used for reading the document in the storage device and opening the document; and the projection module is used for projecting the video and audio file played by the video and audio playing module or an image corresponding to the document opened by the document opening module. Peripheral equipment is not needed during the use of the multifunctional projector, so that the resource is saved.

The invention relates to the field of food processing and particularly discloses a food measurement packing system. The food measurement packing system comprises a sealing plate, a supporting rod, a wedge-shaped plate, a sliding rod, a scraping plate, shifting blocks and installation blocks. The upper end and the lower end of a feeding cylinder are both opened. The sealing plate is vertically arranged at the lower end of the feeding cylinder. The wedge-shaped plate is vertically arranged at the lower end of an inner cylinder in a sliding manner. The two ends of the supporting rod are welded tothe wedge-shaped plate and the sealing plate. A cleaning mechanism comprises a spring, the vertically-arranged sliding rod, the scraping plate, the shifting blocks and the installation blocks, wherein the installation blocks are welded into the feeding cylinder, the upper surfaces of the installation blocks are first wedge-shaped faces which are downwards concaved, and the lower surface of the wedge-shaped plate is a second wedge-shaped face; the feeding cylinder is internally provided with a sliding groove; and the sliding rod is installed in the sliding groove, the lower end of the slidingrod is welded to the scraping plate, and the scraping plate makes contact with the inner wall of the feeding cylinder. By means of the scheme, semi-solid food adhering to the inner wall of the feedingcylinder can be packed in a plastic container, and the packing precision is improved.

The invention discloses a multi-cylinder lock bit, which is characterized in that the inside of a lock bit is provided with a plurality of lock cylinders and a plurality of sets of locking mechanisms; as an example shown in a Figure 4, the lock cylinders (including an outer lock cylinder 3, an upper lock cylinder 4 and a lower lock cylinder 5) of a three-cylinder lock bit are framed and represented by dotted lines; the structure layout drawings of the three-sets of locking mechanisms respectively consisting of the lock cylinders above are as follows: a locking mechanism for the outer lock cylinder is shown in a Figure 9, a locking mechanism for the upper lock cylinder is shown in a Figure 10, and a locking mechanism for the lower lock cylinder is shown in a Figure 11; and a set of lock cylinder (namely, a middle lock cylinder 6 shown in a Figure 5) is added between the upper lock cylinder 4 and the lower lock cylinder 5, then a four-cylinder lock bit is formed. Through carrying out 45-degree staggered arrangement on the key-tooth accommodating grooves of the upper and lower lock cylinders, a state that the locking mechanism of the lower lock cylinder 5 is completely shielded by a metal lock cylinder body of the upper lock cylinder 4 is formed, thereby truly achieving the cylinder-shielding effect of locksets. Compared with common lock bits, the capability of a cylinder-shielded and multi-cylinder lock bit in violent opening and technique countermeasures is incomparable.

The invention discloses a four-link opening mechanism for a charging port cover of an upper grid of a pure electric vehicle, which comprises a charging port cover and an electronic lock device, one end of the charging port cover is provided with a charging port cover fixing hole, and the other end of the charging port cover is provided with a There is a second lock pin, a charging port cover base is provided in the middle of the charging port cover, a four-link device is provided on the charging port cover base, a lock hole is provided on one side of the electronic lock device, and a spring is provided at the bottom of the lock hole. One side of the lock hole is provided with a first lock pin, one side of the first lock pin is provided with a connecting rod, the middle part of the connecting rod is provided with an electric telescopic rod, one end of the electric telescopic rod is provided with a fixed steel plate, and the other end of the electric telescopic rod A controller and a signal receiver are provided, and the four-bar linkage device is composed of a first link, a second link, a third link and a fourth link. The device can directly control the opening and closing of the charging port cover with a key in the cab of the car or outside the car, without manual operation, saving time and bringing convenience to people.

The invention discloses a real-time embedded controller for an aircraft flight and maintenance training simulator. An external box body is fixedly connected to the front end of an embedded controllerbox body; a controller box door is rotatably connected to the front end of the external box body; a controller mounting frame is fixedly mounted at the front end of the embedded controller box body; and the controller main body is fixedly mounted on the controller mounting frame towards the controller box door. According to the invention, air-cooling heat dissipation and water-cooling heat dissipation are carried out at the same time to ensure the heat dissipation effect of the controller; meanwhile, a heat dissipation water pipe arranged in a heat dissipation fin plate is connected with a water tank in a water-cooling heat dissipation part; low-temperature cooling water in the water tank of the water-cooling heat dissipation part flows into the heat dissipation water pipe; the low-temperature water pipe conducts temperature through the heat dissipation fin plate to lower the temperature of the heat dissipation fin plate, so that air blown into the controller body by a third fan is cooled, air blowing heat dissipation is conducted on the controller body, low-temperature air is blown to the controller, and, therefore the air cooling heat dissipation effect is improved.

The invention disclosers a dust measurement filter box opener and a using method. The dust measurement filter box opener comprises a case, a transmission device and a lifting device, wherein a fixed seat is arranged in the middle of the bottom in the case; an extrusion device is arranged in the fixed seat; the extrusion device is connected with the inner wall of the lower side of the case; the transmission device comprises a motor, a driving gear, driven gears, a sliding rod and a threaded rod; the motor is arranged in the middle of the upper end of the case; the driving gear is arranged in the middle of the inner wall of the case; the sliding rod and the threaded rod are both vertically arranged in the case; the upper end of the threaded rod is connected with the driven gears; the drivengears are matched with the driving gear; the lifting device is connected with the threaded rod and the sliding rod; a switch and an electric wire are arranged on the case; and the switch is electrically connected with the motor and the electric wire. According to the opener, the problem that a filter box is damaged in an opening process is solved, so that the filter box is prevented from being damaged; the using method is simple and convenient and is easy in operation, and the filter box is opened quickly, so that the time is greatly saved, and the working efficiency is improved.

The invention discloses a multi-layer staggered-movement nested openable roof, and belongs to the technical field of building construction. The multi-layer staggered-movement nested openable roof solves the problems that an existing openable roof structure cannot be arbitrarily adjusted in position and the structural stability is poor. A roof body comprises a front section roof, a last section roof and a plurality of middle section roofs, wherein the multiple middle section roofs are located between the front section roof and the last section roof, and the front section roof, the multiple middle section roofs and the last section roof are arranged in a stacked mode in sequence from bottom to top; the front section roof, the last section roof and the multiple middle section roofs are each of an inverted V-shaped structure, and the front section roof is horizontally and slidably disposed on two main rails; the front part of one of the middle section roofs is slidably disposed on the front section roof, and the front parts of the rest of the middle section roofs are slidably disposed on the middle section roofs below; and the front part of the last section roof is slidably disposed on the middle section roof below, and the rear part of the last section roof and the rear parts of the multiple middle section roofs are slidably connected to the two main rails.

The invention provides a lifting loading device. The device comprises a lifting hopper and two inclined guide rails for ascending and descending of the lifting hopper, the lifting hopper comprises a hopper body and a discharging door arranged at the bottom of the hopper body, one end, away from the inclined guide rails, of the discharging door is rotatably connected with the hopper body, one of, close to the inclined guide rails, of the discharging door is provided with first walking parts which are supported on the inclined guide rails, and the discharging door is located between the two inclined guide rails; and the two inclined guide rails are each provided with a fork channel communicating with the corresponding inclined guide rail so as to enable the first walking parts to enter, oneside, close to the inclined guide rails, of the hopper body is provided with one or more sets of second walking parts which are supported on the inclined guide rails, the bottom, close to the inclinedguide rails, of the hopper body is provided with limiting walking parts which are used for controlling the second walking parts not to deviate from the inclined guide rails, and the limiting walkingparts abut against the inclined guide rails. The invention further discloses a material distributing system with the lifting loading device. According to the limiting walking parts arranged at the lifting loading device, the phenomenon that an existing lifting hopper is prone to shifting or derailing when moving along the guide rails is overcome.

The invention discloses clothing treatment equipment. The clothing treatment equipment comprises a rotating barrel, a drainage hole and a plugging mechanism, wherein the rotating barrel can rotate inthe axial direction of the equipment, the drainage hole is formed in the lowest position of the bottom of the rotating barrel and the plugging mechanism is arranged at the lowest position to open or close the drainage hole, and the plugging mechanism covers the drainage hole and can rotate along with the rotating barrel when in a closed state. According to the clothing treatment equipment, a structure equivalent to an outer barrel is omitted, all washing water is contained in the rotating barrel, and the consumption of washing water is reduced. In addition, the problem of how to discharge water from the rotating barrel in the washing / dewatering process is effectively solved.

The application provides an electricity larceny prevention power distribution box comprising: a box body, a box door and a mechanical lock, wherein the mechanical lock comprises a cylindrical lock cylinder and four lock columns tangential to the outer edges of the lock cylinder; a first through hole is disposed on the center of the box door; the lock cylinder passes through the first through holeto be engaged with the box door; one end of the lock cylinder extending to the inner side of the box door is provided with a gear; one end of each lock column corresponding to the gear is provided with a rack meshed with the gear; the lock columns are disposed on the inner side of the box door; the adjacent lock columns are perpendicular to each other in the same horizontal plane; the outer side of the box door is provided with a knob corresponding to the lock cylinder; and the knob is fixedly connected to one end of the lock cylinder away from the gear; locking grooves are arranged in the boxbody corresponding to the lock columns; and an end of each lock column away from the gear is movably engaged with the locking groove. The knob on the outer side of the box door is rotated in order torotate the gear of the lock cylinder, and then screw the four locking columns tangential to the gear in or out of the locking grooves in the box body, thereby locking or unlocking the box door and the box body. The electricity larceny prevention power distribution box is easy to operate and practical.

The invention provides an automatic flow stopping device adopting pipe inner pressure. The automatic flow stopping device comprises a valve body, a flow through hole formed in the valve body, and a valve element used for opening and plugging the flow through hole. The medium pressure in a pipe is utilized to push the valve element to automatically move in the flow direction of the medium pressurein the pipe, so that the flow through hole is plugged; acting force outside the pipe is utilized to overcome the medium pressure in the pipe, and the valve element moves in the opposite direction of the flow direction of the medium pressure in the pipe, so that the flow through hole is opened. Automatic plugging from the tail end of a pipeline can be achieved, the automatic flow stopping device utilizes the water pressure in the water pipe, the situation that a tradition water stop valve utilizes a spring to achieve displacement of a stopping piece so as to conduct blocking is not needed, water leakage caused by damage of the spring is effectively avoided, the automatic flow stopping device is simpler in structure, and the water stopping effect is good; and detaching is not required, otherwater taking devices such as a faucet are directly mounted for automatically opening a plug, and when other devices such as the faucet are removed, the plug is automatically plugged.