45results about How to "Realize double protection" patented technology

The invention discloses a surface-hardening treatment method of sealing pairs and friction pairs of titanium and titanium alloy ball valves. The sealing pairs are related sealing parts at all sealing positions in a valve, a ball and a valve base, and the friction pairs are related friction parts at all transmission connection positions in the valve, the ball and the valve base. The surface-hardening treatment method relates to chemical heat treatment and a vapor deposition hard coating. The chemical heat treatment and the vapor deposition hard coating are simultaneously used for the sealing pairs and the friction pairs of titanium and titanium alloy ball valves so that the problem that surface hardness of the titanium and titanium alloy ball valves treated by a single chemical heat treatment process is low. Based on the chemical heat treatment, the vapor deposition hard coating is adopted so that a hardness difference of a chemical heat treatment infiltrated layer is reduced. The vapor deposition hard coating further improves bonding strength of the chemical heat treatment infiltrated layer and improves surface hardness of the titanium and titanium alloy ball valves. Even if the vapor deposition hard coating is damaged in actual use, a hardened layer formed from the chemical heat treatment infiltrated layer still has a protection effect so that dual protection is realized.

The invention discloses a vertical lift with a lift car internal self-rescue mode. The vertical lift comprises a lift car, a shaft well, a lift car frame, a locking device, a joystick and stop dogs, wherein the lift car frame is provided with a top frame and a side face frame; the locking device is horizontally arranged on the top frame and can move axially; the joystick is vertically arranged on the side face frame and can move axially; and the stop dogs are arranged on the shaft wall and matched with the locking device in shape. When an existing anti-falling device fails, a person in the lift can manually brake the lift to achieve the purpose of falling prevention, and self rescue of the person in the lift is achieved.

The invention discloses an electric vehicle fault repairing method. The method comprises the following steps that: a first VIN code stored in a vehicle control unit is obtained through a diagnostic apparatus; the diagnostic apparatus compares the first VIN code with all VIN codes stored in the diagnostic apparatus and judges whether the first VIN code is normal or not; and when the first VIN codeis abnormal, the diagnostic apparatus acquires a second VIN code according to a bar code on an electric vehicle, and transmits the second VIN code to the vehicle control unit for storage. When the VINcode stored in the vehicle control unit of the electric vehicle is abnormal, the function of writing the correct VIN code of the electric vehicle into the vehicle control unit and storing the correctVIN code is implemented, repairing of the abnormal VIN code originally stored in the vehicle control unit is completed, the vehicle control unit does not need to be sent to a repairing factory to berepaired again, so that time is saved, and the repairing efficiency is improved.

The invention particularly relates to a high-voltage shore power centralized monitoring system. The system comprises a shore-side shore power system located on the shore side and shore-side power connection equipment used for being connected to ship-side power connection equipment, and the shore-side shore power system is connected with an original ship power distribution board through the shore-side power connection equipment, the ship-side power connection equipment, a shore power connection power distribution cabinet, a transformer and a shore power access control screen in sequence; the high-voltage shore power centralized monitoring system is connected with a shore power intelligent monitoring system used for monitoring the system state and remote communication; the ship-side power connection equipment comprises a cable winch and a shore power switching-on interlocking mechanism, and the cable winch and the shore power switching-on interlocking mechanism are arranged on the base; and the shore power switching-on interlocking mechanism comprises a machine body, and the machine body is provided with a toggle switch and a secondary protection mechanism. The system has the beneficial effects that: ship power access and shore power access are controlled in a unified manner, switching-on interlocking is realized, the shore power access operation efficiency and stability are improved, meanwhile, the cable winch, the ship power access equipment and the switching-on interlocking mechanism are managed in an integrated manner, and the system is safer and more reliable.

The invention discloses a vertical lift capable of achieving manual falling prevention. The vertical lift comprises a lift car, a shaft well, a lift car frame, a locking device, a joystick and stop dogs, wherein the locking device is arranged on the lift car frame and can move axially; one end of the joystick is arranged on the lift car frame and matched with the locking device in shape, the other end of the joystick is arranged in the lift car, and the joystick can move axially; and the stop dogs are arranged on the shaft wall and matched with the locking device in shape. When an existing anti-falling device fails, a person in the lift can manually brake the lift to achieve the purpose of falling prevention, and self rescue of the person in the lift is achieved.

The invention relates to a double-tensioning-wheel tensioning device for a compensating rope. The double-tensioning-wheel tensioning device is characterized in that the double-tensioning-wheel tensioning device comprises a fixing rack, a lifting mechanism, compensating rope tensioning wheels and a tensioning wheel frame; the fixing rack comprises an installing base, guiding rail racks and a limiting rod, wherein the guiding rail racks are on the two sides of the fixing rack, and the limiting rod is on the top of the fixing rack; the lifting mechanism comprises a hydraulic cylinder installing base, symmetrical hydraulic cylinders and a lifting transverse beam driven by pushing rods of the hydraulic cylinders; the two compensating rope tensioning wheels are arranged in the tensioning wheel frames front and back; the top of the tensioning wheel frame is arranged below the lifting transverse beam; and guiding shoes on the two sides of the tensioning wheel frame are operationally installed on the guiding rail racks of the fixing rack correspondingly. The double-tensioning-wheel tensioning device for the compensating rope is scientific and reasonable in structure design, achieves jumping and swinging of the compensating rope, meanwhile, has a safety protection function, largely improves the operating safety of an elevator, and is the highly creative double-tensioning-wheel tensioning device for the compensating rope.

The invention relates to a chromium-containing oxide-carbide composite coating and a preparation method thereof, and belongs to the technical field of design and preparation of an ultra-high temperature ablation resistant oxide-carbide composite coating. The chromium-containing oxide-carbide composite coating contains silicon carbide, zirconium carbide, a chromium-alumina solid solution and an aluminum carbide. The preparation method is as follows: first, according to the molar ratio of Zr:Si:Al:Cr:C=(3-4):(1-3):4:1:(7-10), respectively taking zero-valent Zr, Si, Al, Cr and C; evenly mixing the Zr, the Si, the Al, the Cr and the C into slurry; coating a substrate with the slurry, drying, and performing low-pressure plasma spraying while sintering at high temperature of 1500-1600 DEG C to obtain the chromium-containing oxide-carbide composite coating. The chromium-containing oxide-carbide composite coating has the advantages of reasonable design of coating composition and simple and controllable preparation process, and is convenient for large-scale industrial application.

The invention discloses a campus monitoring system. Relating to the technical field of campus monitoring, the system is used for solving the problem that eyes of an operator on duty are prone to fatigue in an existing monitoring system. The system comprises a data acquisition unit, a storage unit, a control unit, a display unit and an alarm unit, the data acquisition unit is connected with the storage unit in a wired or wireless manner, the storage unit comprises a surface storage library for storing pictures of teachers and students in a school, the control unit comprises a surface recognition unit, a voice input and output unit and a communication unit. The storage unit is connected with the input end of the control unit, wherein the display unit and the alarm unit are both connected with the output end of the control unit, the control unit is connected with communication equipment of parents, teachers, operators on duty and patrols through the communication unit, and automatic opening and closing of the school gate and monitoring of abnormal conditions of a courtyard wall are achieved through a surface recognition method. The device has the advantages that the structure is simple, and the workload of operators on duty is conveniently reduced.

The embodiment of the invention discloses a novel electrostatic protection method. The method comprises the following steps that an integrated circuit is arranged on a first chip; an electrostatic protection circuit is arranged on a second chip, and the electrostatic protection circuit comprises a first input output port, a second input contact port, a first diode, a first resistor, a first N-type field effect transistor and a ground end output port, and further comprises a second diode, a capacitor and a second N-type field effect transistor; and the first input output port is connected with the input port of the integrated circuit, so that the electrostatic protection method can realize dual protection on the integrated circuit, and the reliability of the integrated circuit is effectively ensured. Moreover, the integrated circuit and the electrostatic protection circuit are arranged on different chips, thereby avoiding the electrostatic protection design on the chip where the integrated circuit is located, and solving a problem that the electrostatic protection design cannot be carried out because of the limitation of the substrate material of the chip where the integrated circuit is located. And the electrostatic protection of a novel material integrated circuit which is sensitive to static electricity can be realized.

Disclosed is a vertical elevator with a high-strength locking pin. The vertical elevator comprises a lift car, a well wall, a lift car frame, a locking device, a control rod and stop blocks. The locking device is arranged on the lift car frame and can move axially. One end of the control rod is arranged on the lift car frame and matched with the locking device in shape. The other end of the control rod is arranged in the lift car, and the control rod can move axially. The stop blocks are arranged on the well wall and matched with the locking device in shape. The locking device comprises a first elastic part and the locking pin. One end of the first elastic part and the locking pin are connected mutually. The other end of the first elastic part and the lift car frame are connected mutually. The locking pin comprises a set of long fibers and a metal layer. The set of long fibers are evenly distributed in the metal layer and formed in a squeeze casting mode. The direction of the long fibers is parallel to the axial direction of the locking pin. A buffer layer is arranged on the periphery of the locking pin. When an existing fall-prevention device loses efficacy, people in the elevator can brake the elevator manually to achieve the fall-prevention purpose, and thus self rescue of the personnel in the elevator is achieved.

The invention discloses a hole sealing device for monitoring the grouting pressure of grouting anchor rods. The hole sealing device comprises a first hole sealing disc and a second hole sealing disc, wherein the first hole sealing disc is movably arranged at the hole opening position of a grouting hole so that the grouting hole can be sealed after grouting is finished, and the multiple first grouting anchor rods are arranged in the first hole sealing disc in a sealed and sliding penetrating mode; the second hole sealing disc is fixed in a reamed hole so that the reamed hole can be sealed in the grouting process; the reamed hole is formed in the hole opening position of the grouting hole, and the diameter of the reamed hole is larger than that of the grouting hole; and the first grouting anchor rods are subjected to pulse slurry supply through a pulse slurry supply assembly.

The invention relates to an external heating ultrahigh-temperature flange sealing performance detection system, which comprises a flange, a heating box, a gas supply device and a gas detection device, and is characterized in that a heater is fixedly mounted in the heating box; the flange comprises two flange plates which are oppositely and fixedly installed in the heating box, one ends of the two flange plates are fixedly connected, the interiors of the two flange plates are communicated, and the other ends of the two flange plates are closed. A sealing sleeve fixedly sleeves one end of each of the two flange plates, and a sealing cavity is formed between the sealing sleeve and one end of each of the two flange plates; the gas supply device communicates with the interiors of the two flange plates through gas inlet pipes, and the gas detection device communicates with the sealing cavity through a gas outlet pipe. The device has the beneficial effects that an external heating mode is adopted, a temperature control system is combined to simulate a constant high-temperature environment, a helium supply device is used for conveying, a certain pressure is kept in a pipeline, a flange periphery helium detection mode is adopted, the detection result is accurate, and parameters such as the leakage rate can be correspondingly calculated.

The invention relates to the technical field of drill bit devices for neurosurgery, in particular to a drill bit device capable of suddenly stopping after drilling through a skull, which comprises an output shaft, a coupling head assembly, a coupling sleeve assembly and a drill bit assembly, one end of the coupling head component is spliced and assembled with the end part of an output shaft of the electric drill, the other end of the coupling head component is spliced and assembled with the coupling sleeve component, and the other end of the coupling sleeve component is sheathed and assembled with the drill bit component; the connecting sleeve assembly comprises a connecting sleeve, an inverted conical hole, a first steel ball, a through hole, a first compression spring, an inner sleeve and an ejector rod. An inverted conical hole is formed in the circumferential wall of the connecting sleeve in the circumferential direction, a first steel ball is assembled in the inverted conical hole, and a penetrating hole is formed in the side wall of the right end of the connecting sleeve in the axial direction. When the drill bit drills through the skull, the axial and acting force of the skull on the drill bit disappears or is smaller than a certain value, under the action of an internal mechanism, the device does not transmit torque to the drill bit any more, the cutting torque of the drill bit is automatically cut off, and the purpose that the drill bit automatically stops after drilling through the skull without hurting other parts is achieved.