30results about How to "Reduce the chance of burning out" patented technology

The invention discloses a feeding machining mechanism of a numerical control cutter grinding machine. The feeding machining mechanism comprises a main rack. A main platen is fixed to the main rack. A grinding wheel loading device, a feeding rotary plate device and a cutter rotary spindle mechanism are all fixed to the main rack. The grinding wheel loading device, the feeding rotary plate device and the cutter rotary spindle mechanism are arranged around the main platen. All the components of the feeding machining mechanism are operated mechanically and automatically. Stable rotation of a rotary plate is ensured. Besides, as the flexible connection is adopted, a motor of the rotary plate can still rotate slowly when the rotary plate is stuck and cannot move, the probability of burnout of the motor is decreased. Meanwhile, the rotary plate can be stopped from operation momently under the condition that the operation of the motor is not stopped so as to meet the demand for production testing. A cutter rotary clamping device can be rotationally adjusted, and the reasonable structure and convenience are achieved.

The invention provides an AB-class audio amplifier power protector, comprising an aluminum wire resistor for detecting currents of output tubes, a micro-current source circuit of a low-voltage transfer current and a current threshold detection module as well as a module for controlling an output drive current. The audio amplifier power protector is mainly characterized in that the aluminum wire resistor is used to detect an output current and starts an overcurrent protection function; and the differential pressure of output tube CEs is used to control the output overvoltage protection of the output current. An output overcurrent protection module mainly uses the reduction voltage of the current of the output tubes on the aluminum wire resistor to actuate the micro current source output current to be enlarged; when the current is more than a threshold value, a current mirror works and outputs part of drive current after the output tubes are pulled off, thus realizing the restriction ofthe output current; and the output overvoltage protection uses two divider resistors which are connected between the output tube CEs in parallel, when the voltage on the low resistor is enlarged, theoutput current of the micro current source module is changed, thus reducing output of the drive current, thereby avoiding that the output tubes output too large currents when the differential pressure is too large.

The invention belongs to the technical field of cables, and particularly relates to a separation-type lightning protection cable. The separation-type lightning protection cable comprises electric units, an inner jacket, an armoring layer, an outer jacket and a grounding layer; the inner jacket sleeves outside a first protective layer, a second protective layer is arranged outside the inner jacket, the grounding layer is arranged outside the second protective layer, the armoring layer is arranged outside the grounding layer, and the outer jacket is arranged outside the armoring layer; the first / second protective layer is made of a mica tape; and the separation-type lightning protection cable is characterized in that a position fixing element is arranged in the first protective layer, the position fixing element has a plurality of storage holes which are not communicated with each other, the electric units are distributed in the storage holes, and each storage hole is only provided with one electric unit; each storage hole is provided with an opening which is arranged on the edge of the position fixing element, and the electric unit can stretch into the storage hole or be taken out from the storage hole through the opening; besides the opening position, the edge of the position fixing element is positioned on the same cylindrical surface. The separation-type lightning protection cable has the beneficial effects that simplicity in production is realized, the production speed is high, the resistance rate of the grounding layer is low and the maintenance cost is low; the electric power still can be normally transmitted when the cable is provided with high load or struck by the lightning.

The invention belongs to the technical field of cables, and relates to a lightning protected cable for a communication base station. The lightning protected cable for the communication base station comprises a cable core, an inner jacket, an armor layer, an outer jacket, a ground layer, a connecting rib, a suspension wire and a suspension wire protective layer, and is characterized in that the cable core is coated with a first protective layer which is coated with the inner jacket in an extrusion molding manner, the inner jacket is coated with a second protective layer, and the ground layer is arranged outside the second protective layer and coated with the armor layer which is coated with the outer jacket in an extrusion molding manner; the armor layer adopts a steel strip coated with a film on single surface, and the surface, contacted with the ground layer, of the armor layer is not coated with the film; the first protective layer and the second protective layer adopt mica tapes; the outer jacket is prepared from raw materials in parts by weight as follows: 71 parts of polyethylene, 1 part of the antioxidant 1010, 12 parts of aluminum hydroxide, 0.5 parts of the HK type antistatic agent, 3 parts of ethyl acetate, 1 part of carbon black, 10 parts of zirconia and 1.5 parts of polyethylene wax. The lightning protected cable has the main benefits as follows: the manufacture is simple and convenient, the production speed is high, the electrical resistivity of the ground layer is lower, the maintenance cost is lower, less dust is absorbed, and the voltage withstand performance and the flame retarding performance are better.

The invention discloses a combined type tuyere small sleeve which comprises a central sleeve, an internal sleeve, a first sleeve, a second sleeve and a third sleeve, wherein the central sleeve is fixedly socketed with the internal sleeve to form an oxy-coal medium channel; the gap between the first sleeve and the central sleeve forms a cooling water inflow channel, the gap between the second sleeve and the first sleeve forms a gas medium channel, the gap between the third sleeve and the second sleeve forms a cooling water backflow channel, a front cap and a rear cap which are in an integrated structure are fixedly connected with one ends far away from a water inflow port and a water backflow port of the cooling water inflow channel and the cooling water backflow channel, and the cooling water inflow channel and the cooling water backflow channel are communicated through the front cap and the rear cap, thus forming a cooling water circulating channel; and the front cap is provided with an oxy-coal medium outlet and a gas medium outlet. The invention has the advantages of simple structure, good cooling effect, high reliability and safety, and long service life.

The invention discloses a conductive connecting piece and a multi-jack socket, which belongs to the technical field of sockets. The conductive connecting piece is used for the multi-jack socket, and comprises a plurality of connecting sections which are connected in sequence and are in one-to-one correspondence with a corresponding number of plug bushes. And in the plurality of connecting sections, the resistance of the first connecting section is minimum, and the first connecting section is a connecting section adjacent to the wiring terminal of the socket. By minimizing the resistance of thefirst connecting section adjacent to the wiring terminal of the socket, the burnout probability of the connecting piece can be reduced, and material waste is avoided.

The invention discloses a control system for express storage equipment, comprising a master controller, a slave controller, an electromagnetic lock, an external light control module, an internal light control module, a network connection module, a user APP terminal, and a The external lighting on the top of the storage device and the internal lighting installed in each storage compartment of the express storage device, the user APP terminal controls the opening or closing of the external lighting and the unlocking or closing of the electromagnetic lock through the main controller. Lock. The invention can control each electromagnetic lock in two ways, effectively reducing the probability of the electromagnetic lock being burned out due to the damage of the relay, saving investment and maintenance costs, and the user can interact with the express storage device in the form of APP to store the express store. It is especially suitable for unattended express storage equipment that provides 24-hour service, so that users can see the items stored in the express storage equipment.

The invention discloses a dual-source steering motor for a new energy vehicle, comprising a dual-source motor body, a top casing, a protective casing, a tail casing and a control box. The outer side is provided with a first hole, the outer side of the dual-source motor body is provided with a second hole, and the outer side of the dual-source motor body is fixedly installed with a chute frame. Through the set fan blades, when the rotating shaft rotates, the fan blades are driven to rotate, the fan blades pump the airflow outward, and the airflow enters the dustproof net from the outside at the initial position, and enters the inside of the first hole through the dustproof net, and enters through the first hole. In the casing of the dual-source motor body, the heat generated inside is exported, and the air flow is then discharged between the protective shell and the dual-source motor body through the second hole, which can effectively dissipate the heat in the dual-source motor body during high-power use. , Increase the heat dissipation efficiency, reduce the burnout probability of the high-voltage winding of the dual-source motor body, and increase the service life and safety.

The invention belongs to the technical field of cables, and relates to a lightning-proof cable for a communication base station. The lightning-proof cable comprises a cable core, an inner jacket, an armor layer, an outer jacket, a ground layer, a connecting rib, suspension wires and a suspension wire protecting layer, and is characterized in that the cable core is wrapped with a first protective layer; the inner jacket wraps the first protective layer through extrusion moulding; the inner jacket is wrapped by a second protective layer; the ground layer is positioned outside the second protective layer; the armor layer wraps the ground layer; the outer jacket wraps the armor layer through extrusion moulding; the armor layer is a steel belt with one surface coated with a film; the surface, in contact with the ground layer, of the armor layer is not coated with a film; the first protective layer and the second protective layer are mica tapes; the outer jacket is prepared from following raw materials in parts by weight: 71 parts of polyethylene, 1 part of an antioxidant 1010, 12 parts of aluminium hydroxide, 0.5 part of an HK-type antistatic agent, 3 parts of ethyl acetate, 1 part of carbon black, 10 parts of zirconium oxide and 1.5 parts of polyethylene wax. The lightning-proof cable has the main benefits as follows: the lightning-proof cable is easy to manufacture, high in production speed, lower in resistivity of the ground layer, lower in maintenance cost, smaller in dust adsorption, higher in pressure resistance and better in flame retardance.

The invention belongs to the technical field of cables, and relates to a lightning protection cable for a communication base station, which includes a cable core, an inner sheath, an armor layer, an outer sheath, a grounding layer, a connecting rib, a suspension wire, and a suspension wire sheath; it is characterized in that the cable core The outer cover is covered with the first protective layer, the inner sheath is extruded and coated outside the first protective layer, the inner sheath is covered with the second protective layer, the grounding layer is located outside the second protective layer, and the armored layer covers Covered outside the grounding layer, the outer sheath is extruded and coated outside the armored layer; the armored layer is a single-sided coated steel strip, and the surface of the armored layer in contact with the grounding layer is the non-coated surface; the first and second The protective layer is mica tape; the outer sheath is composed of the following raw materials by weight: 71 parts of polyethylene, 1010:1 part of antioxidant, 12 parts of aluminum hydroxide, 0.5 part of HK type antistatic agent, ethyl acetate 3 parts, 1 part of carbon black, 10 parts of zirconia, 1.5 parts of polyethylene wax. The invention has the following main beneficial effects: simple manufacture, fast production speed, lower resistivity of the grounding layer, lower maintenance cost, less dust adsorption, higher pressure resistance and better flame retardancy.

The invention relates to a vibration reduction lamp which comprises a lamp body and a vibration reduction light source assembly arranged in the lamp body. The vibration reduction light source assembly comprises a light reflection plate, a lamp socket, a flexible vibration reduction device arranged between the light reflection plate and the lamp socket and a light source electrically connected with the lamp socket. By means of the vibration reduction lamp, rigid coupling between the light source and the light reflection plate is removed, damage of the lamp on the light source during high-frequency vibration is reduced, and rate of burned-out lamps caused by poor contact between the lamp socket and the light source is reduced. The vibration reduction lamp is simple in structure and low in production cost.

The invention belongs to the technical field of cables, and relates to a comprehensive anti-lightning cable, which includes a cable core, an inner sheath, an armor layer, an outer sheath, and a grounding layer; Outside the first protective layer, the inner sheath covers the second protective layer, the grounding layer is located outside the second protective layer, the armored layer is outside the grounded layer, and the outer sheath is extruded and coated outside the armored layer; Both the first and second protective layers are mica tapes; it is characterized in that the cable core is composed of multiple electrical units, central isolation elements, and multiple surrounding isolation elements. The electrical units are composed of conductors and insulating layers; the electrical units are distributed in the central isolation The adjacent electrical units around the element are not tangent; the surrounding isolation element is tangent to both the adjacent electrical units and the first protective layer, and the electrical unit is tangent to the first protective layer or has a gap. The invention has the following main beneficial effects: simple manufacture, fast production speed, lower grounding layer resistivity, lower maintenance cost, and normal power transmission under overload and lightning strike conditions.

The invention discloses a manual board discharging device for reflow soldering furnaces, which comprises a conveying chain (1) for conveying printed circuit boards, wherein the conveying chain meshes with a sprocket (3) transmitted by a transmission shaft (2). The device is characterized in that a one-way bearing (4) is sheathed outside the transmission shaft (2), a reflow soldering power unit (5) is arranged on one side of the one-way bearing, and the reflow soldering power unit transmits the one-way bearing by the chain to drive the transmission shaft. The device can discharge boards by manual operation during power failure without being affected by the force of the retarder of the power unit.

The invention discloses an intraoral orthodontic restoration instrument, which comprises a box-shaped main body of the restoration instrument, and a trapezoidal side wall of the main body of the restoration instrument is provided with a power supply interface for inserting a power supply line. Another group of side walls with a trapezoidal outline of the main body of the restorative instrument is provided with a second quick connector, and the second quick joint is threadedly connected with the main body of the restorative instrument. screen, an operation keyboard is arranged on the slope of the prosthetic instrument main body adjacent to the display screen, and two sets of panel threaded rods are arranged on the upper side of the display screen, and the prosthetic instrument main body is connected with the connecting pipe through the second quick joint, so One end of the connecting pipe facing away from the second quick connector is connected to the first quick connector, and the first quick connector is screwed to the operating device. The main body of the dental internal and external prosthetic instrument can quickly dissipate heat from a driving motor driving a dental drill, and is suitable for popularization and use.

The invention belongs to the technical field of cables, and relates to a lightning-proof optical and electric compound cable for a communication base station. The lightning-proof optical and electric compound cable comprises a cable core, an inner sheath, an armor layer, an outer sheath and a ground layer, wherein the cable core is composed of an optical unit and an electric unit, the cable core is covered by a first protective layer, the inner sheath and a second protective layer, the ground layer is arranged outside the second protective layer, the armor layer is arranged outside the ground layer, the outer sheath is arranged outside the armor layer, and the face, making contact with the ground layer, of the armor layer is a film-free face. The lightning-proof optical and electric compound cable is characterized in that the ground layer is composed of ground conductors, filling bars and a winding layer spirally arranged outside the ground conductors and the filling bars in a covering mode, the ground conductors and the filling bars are distributed outside the second protective layer in a mutually staggered mode, the diameter of the each filling bar is no larger than that of the corresponding ground conductor, the winding layer makes contact with the ground conductors and keeps electrical communication with the ground conductors, and the armor layer is located outside the winding layer. The lightning-proof optical and electric compound cable mainly has the advantages of being easy to manufacture, high in production speed, lower in electrical resistivity of the ground layer, lower in maintenance cost and cost and lighter in weight.

The invention discloses a protective shell of a microgrid energy storage device. The protective shell comprises a protective shell body, wherein a shockproof structure and a heat dissipation structureare mounted in the protective shell body; and the shockproof structure comprises a plurality of hinged supports, a plurality of springs, a plurality of rotating frames and shockproof parts, the multiple hinged supports are fixed in the protective shell body, the multiple springs are movably arranged on the multiple hinged supports, and one ends of the multiple rotating frames are movably arrangedin the protective shell body. The protective shell has the beneficial effects that the protective shell is simple in structure, reasonable in design, simple in overall structure, convenient to operate and use; and with the protective shell, the purpose of heat dissipation of the microgrid energy storage device is achieved, the service life of the energy storage device is prolonged, the use efficiency and use effect of the energy storage device are improved, a mounting plate in the shell is protected, damping effect on the mounting plate is achieved, and the stability and reliability of the micro-grid energy storage device on the mounting plate are improved, shockproof performance is improved, and service life is prolonged.

The invention belongs to the technical field of cables and relates to a lightning protected cable for a communication base station. The lightning protected cable for the communication base station comprises a cable core, an inner protecting sleeve, an armor layer, an outer protecting sleeve and a ground layer. The lightning protected cable for the communication base station is characterized in that a first protecting layer is arranged outside the cable core, the inner protecting sleeve is arranged outside the first protecting layer, a second protecting layer is arranged outside the inner protecting sleeve, the ground layer is arranged outside the second protecting layer, the armor layer is arranged outside the ground layer, and the armor layer is coated with the outer protecting sleeve; the armor layer is a single-face film covering steel belt and the face, in contact with the ground layer, of the armor layer is a non-film-covering face; the first protecting layer and the second protecting layer are both mica tapes; the outer protecting sleeve comprises, by weight, the following raw materials of 71 parts of polyethylene, one part of anti-oxygen 1010, 12 parts of aluminum hydroxides, 0.5 part of HK-type antistatic agent, 3 parts of ethyl acetate, 1 part of carbon black, 10 parts of zirconium oxide and 1.5 parts of polyethylene wax. The lightning protected cable for the communication base station has the advantages of being simple in manufacturing, high in production speed, capable of enabling the electrical resisting rate of the ground layer to be low, low in maintaining cost, small in dust adsorption, pressure resistant, and good in flame resistance.