475results about How to "Prevent opening" patented technology

The invention discloses a high-temperature and high-precision wireless temperature measuring device for a semiconductor vacuum high-temperature chamber, and belongs to the technical field of wafer temperature measurement, a device main body comprises a wafer, a control box is arranged above the wafer, supporting legs are arranged between the wafer and the control box, a control system is arranged in the control box, and a temperature measuring circuit is arranged on the surface of the wafer. The temperature measuring circuit is provided with temperature measuring devices, the temperature measuring devices are uniformly distributed on the surface of the wafer, and the temperature measuring circuit is electrically connected with the control system through a connecting line; in the specific implementation process, the control system is composed of a control circuit, a battery, a circuit board, a wireless signal receiver and a wireless signal transmitter, the battery is used for supplying power to the whole control system and the temperature measuring circuit, and measured temperature data are sent to a computer end through the control system.

The invention belongs to the technical field of lathes, particularly relates to a double-stand-column double-channel numerical control vertical lathe and a using method thereof, and provides the following scheme aiming at the problems that in the prior art, scrap iron is prone to being accumulated in a lathe, the moving precision of a workbench is affected, the accumulated scrap iron needs to be manually cleaned, and meanwhile a protective door cannot be effectively limited. The lathe comprises a lathe body, the lathe body is composed of a base and a protective cover, the protective cover is fixed to the top of the base, two movable doors are arranged on one side of the protective cover, and the protective cover is matched with the movable doors to be used for preventing scrap iron from splashing during machining; when the workbench moves, scrap iron on the base is shoveled to the sliding plate, in addition, when the four-jaw chuck rotates to machine parts, the synchronous belt and the rubber scraping strip can be driven to operate, the rubber scraping strip can remove the scrap iron on the sliding plate, it is avoided that the moving precision of the workbench is affected by scrap iron accumulation, and the scrap iron can be automatically removed.

The utility model relates to the field of automobile parking space fire fighting equipment, and particularly discloses an intelligent fire extinguishing device for an automobile parking space, which comprises a fireproof cover, a support, a fire fighting nozzle, a temperature sensor, a smoke sensor and a lifting assembly, the fireproof cover is fixedly mounted right above the parking space through the support, and an opening is formed in the bottom of the fireproof cover; the fire-fighting sprayer, the temperature sensor and the smoke sensor are all installed in the fireproof cover, the lower end of the fireproof cover is sleeved with a first fixing frame, the first fixing frame is connected with the lifting assembly and moves up and down under the action of the lifting assembly, when the first fixing frame makes contact with or gets close to the support, the fireproof cover is completely folded, and when the first fixing frame makes contact with the parking space, the first fixing frame moves up and down. The fireproof cover is unfolded, and a closed space is formed between the fireproof cover and the parking space. The fire-proof cover can be used for isolating a vehicle on fire from surrounding vehicles or equipment, fire spreading is avoided, meanwhile, a water pool can be formed in the fire-proof cover to immerse a battery, and the final fire extinguishing purpose is achieved.

The invention discloses a computer network equipment box, and relates to the technical field of computer equipment.The computer network equipment box comprises a machine body and further comprises a lifting device.A sealing cover is rotationally installed at the top of the machine body, a filtering hole is formed in the surface of the machine body, a filtering net is fixedly installed on the inner wall of the filtering hole, and a partition plate is fixedly installed at the bottom of the inner wall of the machine body; the lifting device comprises an opening and closing block, a fixing frame, an L-shaped rod, a placing rod, a placing plate, a placing spring and an equipment body, after limiting of the L-shaped rod is relieved, the placing plate moves upwards under the elastic force effect of the placing spring, and the equipment body is placed on the placing plate; the placement plate moves upwards to drive the equipment body to move upwards, the equipment body moves upwards to be leaked out to facilitate maintenance of maintenance personnel, the equipment can be recovered to a normal operation state more quickly by quickly maintaining the equipment box, and the situation that the working efficiency is reduced due to faults is avoided.

The invention relates to the technical field of logistics, and provides a space-adjustable multi-temperature-zone compartment and a loading method thereof.The space-adjustable multi-temperature-zone compartment is characterized in that a sliding door is arranged on the side wall, away from a vehicle head, of a compartment body; the refrigerating device is arranged in the compartment body and used for refrigerating the interior of the compartment body; each partition plate is arranged in the compartment body and divides the compartment body into a plurality of different temperature areas, and temperature sensors are arranged in the temperature areas; each partition plate is in sliding connection with the compartment body along the corresponding sliding rail, and each partition plate comprises a plate body, a motor arranged on the plate body, a gear connected with an output shaft of the motor and a rack arranged on the side wall of the plate body; the motor drives the gear to drive the plate body to slide in the compartment body; the plate body is provided with a door opening and a sliding door matched with the door opening, the sliding door is connected with the plate body in a sliding mode, and the sliding door abuts against the plate body. No matter where the partition plate is located, the phenomenon that cooling capacity loss of other areas is increased when a certain temperature area is opened is avoided, and therefore the energy efficiency and the heat preservation performance of the compartment are guaranteed.

The present invention relates to the technical field of high-voltage cabinets, and in particular to an insulated high-voltage cabinet for a transformer substation; the cabinet effectively solves the problem of easy electric shock caused by exposed contacts during maintenance and the inconvenience of removing internal components for maintenance; the cabinet comprises a cabinet body, a plurality of bus contacts evenly distributed along the left and right directions are fixedly connected to the upper side of the cabinet body, and a plurality of outgoing line contacts corresponding to the bus contacts are fixedly connected to the lower side of the cabinet body; the present invention can use the shielding component to shield the contacts in time after the power-off component is powered off to avoid electric shock caused by exposed contacts by arranging a shielding component, a baffle, a fixing frame and a locking component, and at the same time use the locking component to lock the position of the baffle to avoid the problem of accidentally touching and opening the baffle during subsequent maintenance; the insulating plate and the driving component are arranged, and the driving component can be used to drive the insulating plate to rise and fall to achieve the purpose of secondary insulation, avoid the problem of accidental touching during maintenance, and improve safety.

The invention discloses a ball mill lining grinding structure and a ball mill, and relates to the technical field of ball mills, a fixing mechanism comprises an arc-shaped groove, a clamping ring, a clamping plate and a clamping assembly, the arc-shaped groove is formed in the end face of a lining grinding plate, the two sides of a groove cavity of the arc-shaped groove are open, the clamping ring is placed in the arc-shaped groove, and the clamping plate is arranged in the clamping assembly. According to the device, the fixing mechanism is arranged, each lining grinding plate is clamped in the inner side of the ball mill barrel through the clamping assemblies, the clamping rings are clamped in the arc-shaped grooves, so that the end faces of the lining grinding plates are aligned, and the lining grinding plates are clamped in the arc-shaped grooves, so that the lining grinding plates are clamped in the arc-shaped grooves, and the lining grinding plates are clamped in the arc-shaped grooves; and the clamping ring is fixed by inserting the clamping plate into the positioning groove, so that the clamping ring is firmly clamped in the arc-shaped groove, and the lining grinding plate is fixed in the ball mill barrel, so that hole sites are prevented from being formed in the lining grinding plate, the problem of powder residue is avoided, and the whole mounting is convenient.

The invention relates to the field of drilling and tapping machines, and provides a double-spindle numerical control drilling and tapping machine. Comprising a hollow base which is of a hollow structure and can concentrate chippings; the shell is fixedly arranged at the top of the hollow base, and a mounting ring is fixedly arranged on the right side of the shell; the storage frame stretches across the left side wall and the right side wall of the shell and is rotationally connected with the shell; the servo motor I is arranged on the mounting ring, and an output shaft of the servo motor I is fixedly connected with the storage frame; the electric clamp is hinged to the middle of the storage frame. Through the arrangement of the drilling and tapping mechanism, under the cooperation effect of a servo motor II and a gearbox, the orientation of a drill bit of the double-shaft drilling machine can be changed, so that drilling and tapping treatment on different faces of a workpiece is achieved, and a storage frame can be driven to rotate through a servo motor I to drive the workpiece on an electric clamp to rotate; the drilling and tapping device can be matched with a drilling and tapping mechanism, and multiple faces of a workpiece can be drilled and tapped without fixing the workpiece again.

The utility model discloses a centrally-mounted electronic limit industrial door opener which comprises a top plate, two lead screws which are distributed side by side in the left-right direction and are opposite in rotation direction are arranged above the top plate, the opposite ends of the two lead screws are fixedly connected with first bevel gears respectively, the two first bevel gears are jointly meshed with a second bevel gear, and the second bevel gear is meshed with a third bevel gear. The second bevel gear is fixedly connected to one end of a rotating shaft, and the other end of the rotating shaft penetrates through an electronic limiting mechanism and is fixedly connected with the output end of a gear motor. The two lead screws are in threaded connection with moving blocks correspondingly, the bottoms of the moving blocks are fixedly connected with connecting plates, the bottoms of the connecting plates are fixedly connected with a door body mounting frame, and the door body mounting frame is fixedly connected to the center of the top of the door body. By arranging the electronic limiting mechanism and adopting an electronic limiting mode, the precision and accuracy of limiting control are improved, the situation that the door body is excessively opened or not closed in place is effectively prevented, and the performance is reliable.

The utility model relates to the field of automobile fire-fighting equipment, and particularly discloses a movable automobile intelligent fire extinguishing device which comprises a fireproof cover, a fire-fighting sprayer, two lifting assemblies and a telescopic arm, the bottom of the fireproof cover is provided with an opening, the lower end of the fireproof cover is provided with a lower fixing frame, and the upper end of the fireproof cover is provided with an upper fixing frame. The bottom of the fireproof cover is connected with the lower fixing frame, the top of the fireproof cover is connected with the upper fixing frame, the fireproof cover is driven by the lifting assemblies to be folded on the lower fixing frame or unfolded to form a closed space, the telescopic arm is located between the two lifting assemblies, and the two ends of the telescopic arm are connected with the lower fixing frame and the fire fighting truck respectively. The fire-proof cover is combined with a fire fighting truck, the fire-proof cover can be used for isolating an on-fire automobile from surrounding automobiles or equipment, fire spreading is avoided, meanwhile, a water pool can be formed in the fire-proof cover to immerse a battery, the final fire extinguishing purpose is achieved, and compared with a water gun fire extinguishing mode, the fire extinguishing efficiency can be improved, and fire extinguishing safety can be ensured; and water resources are greatly saved.

The utility model relates to the technical field of power distribution cabinets, and discloses a modular combined high-low voltage power distribution cabinet, which comprises a ventilation box, the top of the ventilation box is fixedly connected with a cabinet body, the front end of the cabinet body is slidably connected with a plurality of closing plates, the front ends of the closing plates are slidably connected with handles, and the two sides of the rear end of each handle are fixedly connected with limiting blocks. First springs are arranged outside the two sides of the rear end of the handle in a sleeving mode, rotating rods are rotationally connected to the sides, away from each other, of the two limiting blocks, sliding rods are rotationally connected to the ends, away from the limiting blocks, of the rotating rods, clamping blocks are fixedly connected to the other ends of the sliding rods, and a plurality of clamping grooves are formed in the inner walls of the two sides of the cabinet body. According to the utility model, the closing plate can be self-locked, so that the closing plate can be prevented from being opened when the closing plate is not needed, the safety is improved, meanwhile, the closing plate can be quickly opened when the closing plate is needed, equipment in the cabinet body can be conveniently overhauled, and the overhaul and maintenance efficiency is improved.

The utility model discloses a folding luggage case which comprises a folding case body, a pull rod and universal wheels, the folding box body comprises two box frames, a folding sheet, a cover plate, a zipper assembly, two inner supporting plates and a buckle assembly, the bottoms of the two box frames are connected with the universal wheels respectively, the two box frames are connected together through the folding sheet, the folding sheet is connected with the box frames, a notch is formed in the side face of one box frame, the other box frame is provided with a hinge A connected with the supporting plates, and the box frames are further connected with a pull rod; the cover plate is provided with a hinge B connected with the notch. The zipper assembly is connected with the cover plate and the notch. The buckle assemblies are arranged on the two sides of the folding box body. The folding pieces are matched with the buckle assemblies to achieve folding and fixing of the folded structure, the thickness of the luggage case can be reduced through folding, and the luggage case is convenient to store; the folding sheets are folded for storage without disassembly, so that the operation is simple, and dust falling and dust collection in the luggage case are avoided; the matching of the inner supporting plate and the box frame can enhance the supporting effect of the folding sheet, so that the whole structure is stable and reliable.

The invention provides a stopping device of a roller shutter door motor, and relates to the technical field of roller shutter doors. The stopping preventing device of the roller shutter door motor comprises a roller shutter door body, a winding roller, a first motor, a second motor and an oil coating brush, the roller shutter door body is wound on the outer surface of the winding roller, fixing plates are fixedly connected to the two ends of the winding roller, a mounting plate is arranged above the winding roller, the first motor is fixedly connected to the bottom of the mounting plate, and the second motor is fixedly connected to the bottom of the mounting plate. The driving end of the first motor is fixedly connected with a driving rod, the end, away from the first motor, of the driving rod and the end, away from the winding roller, of the driving rod are fixedly connected with transmission gears in a penetrating mode, and the outer surfaces of the two transmission gears are connected with a transmission chain in an engaged mode. The lead screw is driven by the second motor, so that the stopping plate can rapidly and accurately move to the preset position to make contact with the driving rod of the first motor and achieve stopping, the roller shutter door is effectively prevented from being opened or closed under the uncontrolled condition, and safety and stability are enhanced.

The invention relates to the technical field of palletizing robots, and discloses a rotary section palletizing robot which comprises a clamping piece mounted on a mechanical arm through a mounting frame, a paper receiving part mounted on the vertical plate and a paper receiving part mounted on the transverse plate, the paper receiving part comprises two sets of bearing parts which are symmetrically arranged about the vertical center line of the mechanical arm, and the two bearing parts can be moved and adjusted to be close to or away from each other in the horizontal direction. By means of the mode that the bearing parts are horizontally separated from each other and moved to be separated, the bearing parts and the folding lines of the sections can be in a parallel state, and by means of the separation mode, a fold can be prevented from being opened, and meanwhile the folding lines of the fold can be further creased; and the bottom surfaces of the book sections and the top surfaces of the book sections below are flattened from inside to two sides, so that the contact surfaces of the book sections during stacking are kept in a complete contact state, the phenomenon of page rubbing and pleating between the book sections is avoided, and the stacking stability is further improved.

The invention belongs to the technical field of smart home, and particularly provides a kitchen environment regulation and control method, a regulation and control device and a machine readable storage medium. The regulation and control method comprises the steps that in response to the fact that a cooking utensil in a kitchen is working, the cooking fume concentration value of the kitchen is obtained; in response to the fact that the oil smoke concentration value reaches a first concentration threshold value, whether a user exists in the kitchen or not is detected; and if the user exists in the kitchen, turning on a range hood of the kitchen so as to discharge oil fume in the kitchen outdoors. Therefore, when the oil smoke concentration value reaches the first concentration threshold value, whether a user exists in the kitchen or not is detected, and when the user exists in the kitchen, the range hood of the kitchen is turned on, so that oil smoke in the kitchen is discharged outdoors; the situation that the range hood is started when no one is in a kitchen, and electric energy is wasted is avoided.

The utility model discloses a connecting rod rotating shaft mechanism of a rotating shaft side sliding door of a shower room, which is used for being arranged between a door frame and the side sliding door and comprises two connecting rod rotating shaft assemblies, the two connecting rod rotating shaft assemblies are symmetrically distributed on the upper side and the lower side of the side sliding door, and each connecting rod rotating shaft assembly comprises a pulley component, a sliding rail and a connecting rod. The sliding wheel component is rotationally installed on the side sliding door, the sliding rail is arranged on the door frame and distributed in the width direction of the door frame, the sliding wheel component is in rolling fit with the sliding rail, one end of the connecting rod is hinged to one side of the sliding rail, and the other end of the connecting rod is hinged to the side sliding door. According to the utility model, the space required for opening the side sliding door is greatly saved, and the door entering space is increased.

The utility model relates to the technical field of maintenance equipment, and discloses a positioning fixture for maintenance of hydroelectric power generation equipment, which comprises a universal wheel, a mounting plate is fixedly connected to the top of the universal wheel, and an electric hydraulic rod is fixedly connected to a center shaft of one side, far away from the universal wheel, of the mounting plate. The servo motor is started clockwise, the servo motor operates to drive the threaded rod to rotate, the connecting rods are connected to the left end and the right end of the ball sliding block and the left end and the right end of the connecting rod, and the connecting rods can prevent the ball sliding block from rotating, so that the ball sliding block moves upwards when the threaded rod rotates, and the ball sliding block drives the bottom end of the connecting rod to move upwards; the top end of the connecting rod can push the first sliding blocks to move in the direction away from each other, the first sliding blocks can drive the clamping mechanisms to move, on the contrary, the servo motor is started anticlockwise, the clamping mechanisms can get close to each other, and therefore the distance between the clamping mechanisms can be adjusted according to the damage length of the pipeline or the thickness of a pipeline butt joint opening.

The utility model discloses a float-type submersible pump which comprises a submersible pump body, a protection assembly and an anti-disengaging assembly. The submersible pump body comprises a supporting frame at the outer end, a pump body fixedly installed on the lower portion of the supporting frame and buoy pieces fixedly installed on the two sides of the upper end of the supporting frame. According to the float-type submersible pump, the protective covers movably installed on the fixing bases on the two sides of the pump body in the submersible pump body can be installed on the two sides of the water inlet portion of the pump body in a clamped mode, so that the outer portion of the water inlet portion of the pump body is protected, and the problems that the water outlet amount of the submersible pump body is small and the submersible pump body is damaged due to the fact that the water inlet portion is blocked by sundries and the like in water are solved. The protective cover which can be opened in a rotating mode facilitates opening and cleaning of the interior and the exterior of the protective cover after use, meanwhile, after the two sides of the protective cover are closed, the clamping strip, clamped in the clamping opening, of the right side of the protective cover blocks the outer side of the clamping opening through the baffle extruded by the spring, and then the stability of the protective cover in the use process is guaranteed.

The utility model discloses an attraction iron plate structure of a universal rotation magnetic lock, and solves the technical problem that a fastening screw prizes an iron plate due to the pulling force in the inclined direction. The device comprises a magnetic lock body, an iron plate and a fastening screw, the fastening screw comprises a nut part and a screw rod part, a supporting ring is arranged on the side, away from the magnetic lock body, of the iron plate, the screw rod part penetrates out of the supporting ring, a rotating spherical surface is arranged on the nut part, and the magnetic lock body is arranged on the rotating spherical surface. A guide spherical surface matched with the rotating spherical surface is arranged on the inner side wall of the supporting ring so that the fastening screw and the iron plate can rotate relative to each other in a universal mode, a gasket used for abutting against a door plate is fixedly arranged on the screw rod part in a sleeving mode, and the gasket is connected with the supporting ring through an elastic supporting part. The magnetic lock can reduce the risk that the iron plate is pried by a fastening screw, and the use stability of the magnetic lock is improved.

The utility model relates to the technical field of containers, and provides a container for coiled material transportation, which comprises a box body, an upper door plate, a lower door plate, two fixing mechanisms and a limiting mechanism, the upper door plate is arranged on the box body, the lower door plate is rotatably arranged on the upper door plate, the two fixing mechanisms are arranged in the box body and used for fixing steel coils, and the limiting mechanism is arranged on the box body. The limiting mechanism is arranged on the box body and used for limiting the lower door plate, and the fixing mechanism comprises a supporting plate, a fixing plate, a tension spring, a transmission assembly and a driving assembly. The problems that a driver in a vehicle head is prone to being seriously hurt, the driver is prone to death when serious, and the danger is high are solved.

The invention provides a locking device (20) for a cover plate of a centrifugal machine, which is used for locking the cover plate of the centrifugal machine and comprises a guide fixing block (33) used for being relatively fixedly arranged on the centrifugal machine; the pressing block (32) is arranged on the guide fixing block (33) and can move relative to the guide fixing block (33); the pressing sleeve (31) is attached to the pressing block (32) and used for being matched with the centrifugal machine cover plate to lock the centrifugal machine cover plate; and the actuating unit is connected with the pressing block (32) and is configured to be capable of driving the pressing block (32) to move and driving the pressing sleeve (31) to move, so that the pressing sleeve (31) moves between a first position for locking the cover plate of the centrifugal machine and a second position for unlocking the cover plate of the centrifugal machine. According to the locking device of the centrifugal machine cover plate, locking and unlocking operation can be conveniently executed, and accidental unlocking can be effectively prevented.

The present invention discloses a semi-open through-hole cover, a sealed wire harness through-hole structure and an installation method thereof. By using a main trunk slot and a plurality of branch trunk slots on the semi-open through-hole cover, each cable of the wire harness can be inserted through the main trunk slot, and then pass through the guide section and the narrowing section of the corresponding branch trunk slot and then be fixed in the corresponding positioning hole, thereby realizing the rapid fixation of the wire harness on the semi-open through-hole cover; the complementary structural boss of the internal component is used to ensure that the sealant poured into the injection ring will not leak into the inner shell of the product through the gap between the cable and the semi-open through-hole cover. Therefore, the present invention can conveniently and quickly realize the assembly of the wire harness and the semi-open through-hole cover, can facilitate the correction of the wrong installation position of the cable of the wire harness, and can ensure that the sealant will not leak into the inner shell of the product, solving the problem that the existing sealed wire harness through-hole structure cannot take into account both the convenience of wire harness assembly and the sealing effect of the sealant.

The invention discloses an injection molding device with a circulating cooling function, and relates to the technical field of injection molding devices.The injection molding device comprises a feeding mechanism, an injection molding mechanism, a transmission mechanism and a temperature control mechanism, the feeding mechanism and the injection molding mechanism are connected in a fastened mode, the transmission mechanism and the injection molding mechanism are connected in a fastened mode, and the temperature control mechanism and the injection molding mechanism are connected in a fastened mode; the temperature control mechanism is communicated with the feeding mechanism, the feeding mechanism is communicated with the injection molding mechanism, the temperature control mechanism is in fastening connection with the injection molding mechanism, the temperature control mechanism is communicated with the injection molding mechanism, the transmission mechanism is in fastening connection with the injection molding mechanism, opening, closing and injection molding actions of the injection molding mechanism are driven by the transmission mechanism, and the temperature control mechanism is in fastening connection with the injection molding mechanism. The temperature control mechanism adjusts the temperature of the injection molding mechanism and the temperature of the feeding mechanism, and raw materials enter the injection molding mechanism through the feeding mechanism and are heated and plasticized under the action of the temperature control mechanism.

The invention is suitable for the technical field related to passenger cars, and provides a driver protection mechanism for a passenger car and a control method.The control method includes the steps that firstly, a user pulls open a barrier plate through a first handle according to the needed position, and then the barrier plate is magnetically connected with a first magnetic block when pulled to the head; at the moment, wanted articles can be taken through the second through groove; secondly, a first protection plate is arranged to prevent the protection door from being broken, and when objects need to be taken, a second protection plate is rotated through a second handle, and the second protection plate is magnetically connected with a second magnetic block; and thirdly, when the protective door needs to be opened, a rotary knob is rotated, a threaded rod is driven to rotate, a first connecting plate is pulled to move upwards under driving of the threaded rod, then a protective block is driven to move upwards, and at the moment, the protective door can be conveniently opened.

The invention relates to a high-rise partition special pump which comprises a water pump body, the water inlet end of the water pump body is connected with a water inlet mechanism, the water outlet end of the water pump body is provided with a pressurizing mechanism used for pressurizing water flow, the top of the pressurizing mechanism is provided with a water outlet supporting piece, and the side faces of the pressurizing mechanism and the water outlet supporting piece are provided with a plurality of water outlet mechanisms. The top of the water outlet supporting piece is further provided with a backflow mechanism connected to the water outlet mechanisms. When the water consumption of any one or two areas is small, but the water consumption of other areas is large, the water can be effectively distributed to the areas needing water through the backflow mechanism, and self-adjustment can be achieved according to the residential water consumption under the condition that the whole pump power is not changed.

This application discloses a door locking control device and its sightseeing vehicle, including: a door lock, a display unit, and a control unit. The door lock includes a lock cylinder, a solenoid valve, a lock block, and a position sensor. The position sensor is used to monitor whether the lock cylinder locks the door, and the solenoid valve is used to move the lock block to fix the door. The display unit includes a first indicator light connected to the position sensor, and the control unit includes a control switch and a second indicator light connected in series with the control switch. One end of the solenoid valve is connected to a first terminal of a power supply, and the other end of the solenoid valve is connected to a second terminal of a power supply through the control switch. By setting up the door lock, display unit, and control unit, the lock cylinder can lock the door while simultaneously controlling the solenoid valve to move the lock block to fix the door, thus preventing the door from being opened from the inside. The position sensor can determine whether the lock cylinder locks the door and visually display this information through the first indicator light. After the control switch is closed, the second indicator light is activated to remind the solenoid valve that it is in working condition, thereby improving the security of the door locking control device.

The utility model relates to the technical field of silicon powder heating, specifically relates to a heating device for powder purification of direct pulling method, including heating block, the lower part of heating block is provided with the footboard, the footboard is connected with heating block through the connecting device, the connecting device includes the connecting hole of setting at the top of footboard, the bottom of connecting hole is provided with the plug pipe, a plurality of expansion joints are provided on the pipe body of plug pipe, improve the fixed effect of connection, guarantee the safe use, prolong the life, reduce the production cost.