31results about How to "Reduced residual pressure" patented technology

A unitary external counterpulsation apparatus includes a curvilinear bed supported by a frame housing and fluid distribution assembly and control module. The bed includes a concave upper portion, a convex lower portion, and a saddle point therebetween. The fluid distribution assembly interconnects a plurality of inflatable devices adapted to be received about the lower extremities of a patient and a compressed fluid source. The control module controls distribution of compressed fluid from the source to the inflatable devices. Variable flow-rate valves optimize distribution of the compressed fluid.

An all-in-one external counterpulsation apparatus and method for minimizing end diastolic pressure that includes an internally housed fluid distribution assembly interconnecting a plurality of inflatable devices adapted to be received about the lower extremities of a patient and an internally housed compressed fluid source to be distributed by the fluid distribution assembly to the inflatable devices. The apparatus includes a curvilinear table with apertures adapted to provide communication between the inflatable devices and the fluid source.

The controllable arrester in metal oxide includes control part and fixed part connected in series. In normal operation of system, the control part and the fixed part together bear system voltage. When amplitude value of system over voltage exceeds prearranged threshold value, the fixed part bears system over voltage. Combining power electronic device in large power with arrester in metal oxide (MO), the invention puts forward concept and designing idea of controllable arrester for aiming at issue of over voltage protection for transmission system in super voltage, extra high voltage. Based on condition of maintaining invariable performance parameters of MO resistance piece, the invention reduces residual voltage of arrester effectively by using characteristics: quick response speed of power electronic device, steady operation, and flexible adjustment so as to raise protection level for arrester.

An external counterpulsation apparatus includes a treatment table and a fluid distribution assembly operable to apply pressure to patient limbs. A first microprocessor controller disposed in the housing unit processes patient treatment data and controls application of pressure through the fluid distribution assembly. A second microprocessor controller external to the housing unit communicates with the first microprocessor controller and outputs data to a human operator. A variable frequency drive device cooperates with the first microprocessor to vary generation of a compressed fluid and distribute the compressed fluid at a flow rate corresponding to the patient treatment data. The fluid distribution assembly includes a plurality of inflatable devices interconnected with a plurality of valves, which deliver a variable flow rate of compressed fluid to the plurality of inflatable devices.

The invention provides an intelligent identification method of 10kV line short-circuit fault voltage. The method is characterized in that a double-CPU feeder terminal formed by a main CPU and a detecting CPU is built, the residual voltage or instantaneous voltage during a 10kV line short-circuit fault is fast identified through the feeder terminal, a locking condition is provided for feeder terminal fault isolation, intelligent diagnosing can be performed and corresponding fault information can be provided when a 10kV power supply voltage transformer outside the feeder terminal and a related detecting loop fail, and a user can be timely reminded to turn on or turn off complete equipment to guarantee that the equipment is in a good operation state. By the intelligent identification method good in social benefit, local feeder automatic fault isolation and power restoration success rate increasing are benefited.

The invention discloses an SPD backup protection circuit breaker, which is used for SPD backup protection. When an SPD is abnormal, the backup circuit breaker protection device can provide inverse time-lag protection and instantaneous protection, breaks power frequency current, protect the SPD from being damaged or enables the SPD to quickly disconnect from a power supply loop the moment the SPD is damaged, so that the SPD can be subjected to preventive protection, and accidents of fire and the like are prevented. The backup circuit breaker protection device comprises a housing, a handle, upper and lower wiring terminals, an installation card, a tripping mechanism, a moving contact, a static contact and an arc extinguish chamber. The backup circuit breaker protection device also comprisesa discharging gap, a positive temperature coefficient resistor, a bimetal piece and an electromagnetic tripper. The backup circuit breaker protection device can protect the SPD and does not influencethe SPD's protection function for protected equipment.

The invention relates to a protective device of direct current power supple for communication equipment and belongs to the technical field of direct current power supply. The protective device comprises a lightning strike protection module, an over / under-voltage protection module, a wave filtering module and a DC-DC power supply module, wherein the lightning strike protection module comprises a primary protection unit, a display unit, a secondary protection unit and a protective tube FU2; the wave filtering module comprises a low-frequency wave filtering unit, a high-low frequency decoupling unit and a high-frequency wave filtering unit. In the invention, a comprehensive protection method based on the cooperation of the three modules, i.e., a reasonable design between two stages of lightning protection in which the first stage of lightning protection is used for aerial drainage and the second stage of lightning protection is used for clamping, is adopted to drain amplified lightning stroke current and to ensure a lower residual voltage value; the over / under-voltage protection of the control of a power supply management module on the power supply module is adopted to prevent the influence from input voltage jumping; meanwhile; the wave filtering mode combining the low-frequency filtered wave and the high-frequency filtered wave is adopted to effectively solve the problems of protection from lightning stoke damage in the direct current power supply for the communication equipment and high-low frequency interference.

This male or female quick coupling element (4; 6) is intended to be coupled to a pressurized fluid pipe (C4; C6). It comprises a body (42; 62) defining at least one pressurized fluid passage (441, 643, 681), a front face and a longitudinal axis (X4; X6) of the coupling element. An inner part (48; 64) arranged in the body is provided with a surface belonging to the front face, as well as a drain passage (482, 484; 642, 644) coupling the pressurized fluid passage and the outside of the coupling element. An opening mechanism (54, 56, 58, 59; 74, 76, 78, 78) is intended to be actuated from the front face of the coupling element to open the drain passage. The inner part (48; 64) is provided with a peripheral groove (484; 644) in which a seal (59; 79) rests that closes off the drain passage (482, 484; 642, 644) in a closing off portion. The opening mechanism is mounted in the inner part and comprises at least one member (58; 78) for controlling the position of the seal (59; 79) relative to the groove (484; 644), this control member being movable between a first inactive position, where it does not move the seal relative to its closing off position, and a second active position, where it acts directly on the seal (59; 79) to open the drain passage (482, 484; 642, 644).

A vehicle includes a residual pressure holding valve provided downstream a feed pump of a fuel to hold a pressure in a fuel pipe leading to the port injection valve. Residual pressure holding valve is opened to return the fuel in the fuel pipe to the fuel tank when the pressure in the fuel pipe exceeds a valve opening pressure, and closed when the pressure in the fuel pipe is lower than the valve opening pressure. At the time of a request to reduce a target pressure of the fuel to be supplied to the electric feed pump, a control device refrains from causing the target pressure to decrease when a load of the engine is smaller than a prescribed value, and causes the target pressure to decrease when the load of the engine is greater than the prescribed value.

This invention relates to a method for producing insulated lightning protection of transmission and distribution line equipment. The invented method for producing explosion, lightning protection devices of unit combined serial gap voltage-sharing which includes its main body part and fixing sealed sheel. The main body part constitutes at least a set of discharging gap valves in effective discharging large panel porous ventilation type discharging gap valve plate clamping hollow insulation pads connected in series with at least a set of hollow ventilation metal zinc oxide composite stuck with insulated tubes and ventilation holes at the center adhered with ventilation insulating arc shield location disks around its waist, available in the production of lightning protection explosion proof insulators and explosion proof lightning arrestors.

The invention discloses an SPD backup protection circuit breaker, which is used for the backup protection of the SPD. When the SPD is abnormal, it can provide inverse time protection and instantaneous protection, break the power frequency current, protect the SPD from damage or quickly separate it from the power supply circuit when the SPD is damaged, and provide preventive protection for SPD failure to avoid fire, etc. Disasters happen. The invention includes a shell, a handle, upper and lower terminals, an installation card, a tripping mechanism, a moving contact, a static contact, an arc extinguishing chamber, and also includes a discharge gap, a positive temperature coefficient resistor, a bimetal sheet and an electromagnetic tripping device . The invention can protect the SPD without affecting the function of the SPD to protect the protected equipment.

The invention discloses a zinc oxide lightning protection chip and a preparation method thereof. The zinc oxide lightning protection chip is composed of the following raw materials in parts by weight: 23-28 parts of zinc oxide, 1-3 parts of magnesium oxide, 3-6 parts of manganese dioxide, 3-5 parts of titanium oxide, 20-27 parts of bismuth trioxide, 2-4 parts of barium oxide, 4-6 parts of strontium oxide and 30-35 parts of antimony pentoxide; and the zinc oxide lightning protection chip is prepared from the steps of burdening, primary ball milling, drying, pre-sintering, secondary ball milling, drying, prilling, sintering and silver plating. The zinc oxide lightning protection chip prepared from the preparation method disclosed by the invention has the advantages of low leakage current, low residual voltage, strong degradation resistance, impact resistance and the like; and the zinc oxide lightning protection chip can be widely used in surge protection devices for lightning protection, and has a relatively good lightning protection effect.

The present invention is directed to a capsule (1) for containing a food ingredient, suitable for being inserted in a food preparation machine (2), said capsule having a rigid body structure defining a closed compartment wherein said ingredient is mixed with a fluid introduced under pressure by said machine in order to produce a food product, said body walls defining an external volume Vcaps, and an internal compartment volume Vcomp, characterized in that said capsule body structure further comprises at least one portion (14) having a shape, dimensions and / or being made of a material such that it is elastically deformable and that Vcaps and Vcomp can be reversibly reduced by at least 3% by applying an elastic compression along at least one dimension of said capsule at the time said capsule is functionally inserted within said machine, said elastic body wall portion allowing the capsule to flex back to its initial volumes Vcaps and Vcomp after extraction, such that residual pressure within said capsule is reduced.

The invention provides a novel overvoltage absorbing device, and relates to the technical field of overvoltage suppression of an electric power system. The absorber is characterized by comprising nonlinear resistors FR1 and FR2, a high-voltage fuse RD, a capacitor C, and a resistor R. One end of the nonlinear resistor FR2 is used as a port, and the other end is connected with one end of the resistor R, one end of the capacitor C, and one end of the nonlinear resistor FR1. The other end of the resistor R, the other end of the capacitor C, and the other end of the nonlinear resistor FR1 are respectively connected with one end of the high-voltage fuse RD. The other end of the high-voltage fuse RD is used as a port. The absorber has good energy gathering and energy absorbing effects, and can effectively suppress atmosphere overvoltage, switching overvoltage, and relatively large amplitude arc grounding overvoltage, and ferromagnetic resonance overvoltage.

This invention relates to a method for producing insulated lightning protection of transmission and distribution line equipment. The invented method for producing explosion, lightning protection devices of unit combined serial gap voltage-sharing which includes its main body part and fixing sealed sheel. The main body part constitutes at least a set of discharging gap valves in effective discharging large panel porous ventilation type discharging gap valve plate clamping hollow insulation pads connected in series with at least a set of hollow ventilation metal zinc oxide composite stuck with insulated tubes and ventilation holes at the center adhered with ventilation insulating arc shield location disks around its waist, available in the production of lightning protection explosion proof insulators and explosion proof lightning arrestors.

A high-capacity overvoltage absorber relates to the technical field of overvoltage inhibition of the power system. The high-capacity overvoltage absorber comprises non-linear resistors FR1 and FR2, a high-voltage fuse RD, a capacitor C and a resistor R, wherein one end of the non-linear resistor FR2 serves as a port while the other end of the non-linear resistor FR2 is connected with one end of the resistor R, one end of the capacitor C and one end of the non-linear resistor FR1; the other end of the resistor R, the other end of the capacitor C and the other end of the non-linear resistor FR1 are connected with one end of the high-voltage fuse RD; and the other end of the high-voltage fuse RD serves as another port. The high-capacity overvoltage absorber is good in the voltage limiting effect and low in residual voltage value, and has very good energy collecting and absorbing effects.

The invention provides a high-capacity overvoltage absorber, and relates to the technical field of overvoltage suppression of power systems. The high-capacity overvoltage absorber is characterized by comprising a nonlinear resistor FR1, a nonlinear resistor FR2, a high-voltage fuse RD, a capacitor C and a resistor R, wherein one end of the nonlinear resistor FR2 is taken as a port and the other end is connected with one end of the resistor R, one end of the capacitor C and one end of the nonlinear resistor FR1 separately; the other end of the resistor R, the other end of the capacitor C and the other end of the nonlinear resistor FR1 are connected with one end of the high-voltage fuse RD separately; and the other end of the high-voltage fuse RD is taken as another port. The high-capacity overvoltage absorber has good energy gathering and absorbing effects, atmospheric overvoltage, operation overvoltage, and arc light grounding overvoltage and ferromagnetic resonance overvoltage with relatively large amplitudes can be effectively suppressed.

The invention discloses a high-energy capacity overvoltage absorber, and relates to the technical field of overvoltage suppression of a power supply. The high-energy capacity overvoltage absorber comprises non-linear resistors FR1 and FR2, a high-voltage fuse RD, a capacitor C and a resistor R, wherein one end of the non-linear resistor FR2 is taken as a port, the other end of the non-linear resistor FR2 is connected with the one end of the resistor R, one end of the capacitor C and one end of the non-linear resistor FR1 separately, the other end of the resistor R, the other end of the capacitor C and the other end of the non-linear resistor FR1 are separately connected with one end of the high-voltage fuse RD, and the other end of the high-voltage fuse RD is taken as another port. The high-energy capacity overvoltage absorber has the advantages of high voltage limiting effect, low residual voltage value and high energy gathering and absorbing effect.

The invention relates to the technical field of safety belt reactor and particularly relates to an emergency locking type safety belt retractor with a pretensioning function, which comprises a rack device, a power device, a coil spring assembly, a pre-tensioning gear, a U-shaped frame, a belt coiling cylinder, a force limiting rod, a check wheel, a locking claw, a return spring, a belt sensing assembly, a vehicle sensing assembly and a cover. The emergency locking type safety belt retractor is characterized in that shafts at the left end and the right end of the pre-tensioning gear are respectively connected a shaft hole in the coil spring assembly and the left end of the force limiting rod in the belt coiling cylinder; the rack device in linear movement is arranged beside the pre-tensioning gear, one end of the rack device corresponds to the meshing position of the pre-tensioning gear, the rack device is meshed with the pre-tensioning wheel in the running process of the rack device, and the power device is arranged at the other end of the rack device. Compared with the prior art, the emergency locking type safety belt retractor has the advantages that as a clutch assembly is not arranged, the structure is compact, and also the volume of a pre-tensioning mechanism is reduced; and as a clutch is eliminated, the energy loss is reduced, the pre-tensioning time is shortened, and further the pre-tensioning efficiency is improved.

The invention provides a system overvoltage inhibition device and relates to the technical field of electric power system overvoltage absorption. The system overvoltage inhibition device comprises a high-voltage current limiting fuse, a voltage transformer, a high-energy-capacity overvoltage absorber, a high-voltage fuse, an intelligent resonance elimination switch and a microcomputer integration protection apparatus. One end of the high-voltage current limiting fuse and one end of a rapid fuse are respectively connected with a high-voltage isolation switch. The other end of the high-voltage current limiting fuse is connected with one end of the high-energy-capacity overvoltage absorber. The other end of the high-energy-capacity overvoltage absorber is grounded. The other end of the rapid fuse is connected with the voltage transformer. The voltage transformer is further connected with the intelligent resonance elimination switch and the microcomputer integration protection apparatus. The microcomputer integration protection apparatus is further connected with the intelligent resonance elimination switch. The intelligent resonance elimination switch is further grounded. The system overvoltage inhibition device provided by the invention is capable of replacing a voltage transformer cabinet; the detection, metering and protection capabilities and the protected capability of the voltage transformer cabinet is improved; in addition, a system peak overvoltage is inhibited, the residual voltage value is low, and accurate and rapid resonance elimination is realized.

The invention discloses a system overvoltage suppression device and relates to the technical field of power system overvoltage absorption. The system overvoltage suppression device comprises a high-voltage current limiting fuse, a voltage transformer, a high-energy-capacity surge absorber, a high-voltage fuse, an intelligent resonance elimination switch and a microcomputer comprehensive protection device, wherein one end of the high-voltage current limiting fuse and one end of a high-speed fuse are respectively connected to a high-voltage isolator; the other end of the high-voltage current limiting fuse is connected to one end of a high-energy-capacity overvoltage protector; the other end of the high-energy-capacity overvoltage protector is connected to the ground; the other end of the high-speed fuse is connected to the voltage transformer; the voltage transformer is respectively connected to the intelligent resonance elimination switch and the microcomputer comprehensive protection device; the microcomputer comprehensive protection device is connected to the intelligent resonance elimination switch; and the intelligent resonance elimination switch is connected to the ground. The system overvoltage suppression device can replace a voltage transformer cabinet and prefects detection and measurement, protective capability and protected capability of the voltage transformer cabinet, the system peak overvoltage can be suppressed, and the residual voltage value is low and the resonance can be eliminated accurately and quickly.

A high-capacity overvoltage absorber relates to the technical field of overvoltage suppression of an electrical power system. The high-capacity overvoltage absorber is characterized in that the high-capacity overvoltage absorber comprises nonlinear resistors FR1 and FR2, a high-voltage fuse RD, a capacitor C and a resistor R. One end of the nonlinear resistor FR2 serves as a port, and the other end is connected with one end of the resistor R, one end of the capacitor C and one end of the nonlinear resistor FR1; the other end of the resistor R, the other end of the capacitor C and the other end of the nonlinear resistors FR1 are connected with one end of the high-voltage fuse RD; and the other end of the high-voltage fuse RD serves as another port. The overvoltage absorber has very good energy-gathering and absorbing functions and can effectively suppress atmosphere overvoltage, switching overvoltage, large-amplitude arc grounding overvoltage and ferromagnetic-resonance overvoltage.

An absorbing device with energy gathering and energy absorbing functions relates to the technical field of power system overvoltage suppression. It is characterized in that it includes non-linear resistors FR1, FR2, high voltage fuse RD, capacitor C, and resistor R; one end of the non-linear resistor FR2 is used as a port, and the other end is connected to one end of the resistor R, one end of the capacitor C, and the non-linear resistor FR1 respectively. One end is connected, the other end of the resistor R, the other end of the capacitor C, and the other end of the non-linear resistor FR1 are respectively connected to one end of the high-voltage fuse RD, and the other end of the high-voltage fuse RD is used as the other port. It has a good function of energy gathering and energy absorption, and can effectively suppress atmospheric overvoltage, operating overvoltage, arc grounding overvoltage and ferromagnetic resonance overvoltage with large amplitude.

An overvoltage absorbing device relates to the technical field of power system overvoltage suppression. It is characterized in that it includes non-linear resistors FR1, FR2, high voltage fuse RD, capacitor C, and resistor R; one end of the non-linear resistor FR2 is used as a port, and the other end is connected to one end of the resistor R, one end of the capacitor C, and the non-linear resistor FR1 respectively. One end is connected, the other end of the resistor R, the other end of the capacitor C, and the other end of the non-linear resistor FR1 are respectively connected to one end of the high-voltage fuse RD, and the other end of the high-voltage fuse RD is used as the other port. It has a good function of energy gathering and energy absorption, and can effectively suppress atmospheric overvoltage, operating overvoltage, arc grounding overvoltage and ferromagnetic resonance overvoltage with large amplitude.

The invention discloses a high-capacity over-voltage absorber, and relates to technical field of over-voltage suppression of power systems. The high-capacity over-voltage absorber comprises a non-linear resistor FR1, a non-linear resistor FR2, a high-voltage fuse RD, a capacitor C and a resistor R, wherein one end of the non-linear resistor FR2 is taken as a port, and the other end of the non-linear resistor FR2 is connected with one end of the resistor R, one end of the capacitor C and one end of the non-linear resistor FR1 respectively; the other end of the resistor R, the other end of the capacitor C and the other end of the non-linear resistor FR1 are connected with one end of the high-voltage fuse RD respectively; and the other end of the high-voltage fuse RD is taken as another port. The high-capacity over-voltage absorber has a good voltage limiting effect, a low residual voltage value and very good energy-gathering and energy-absorbing functions.

The invention provides a high-energy-capacity overvoltage absorber which relates to the technical field of electric power system overvoltage inhibition. The high-energy-capacity overvoltage absorber comprises non-linear resistors FR1 and FR2, a high-voltage fuse RD, a capacitor C and a resistor R. One end of the non-linear resistor FR2 serves as a port, and the other end is connected with one endof the resistor R, one end of the capacitor C and one end of the non-linear resistor FR1. The other end of the resistor R, the other end of the capacitor C and the other end of the non-linear resistors FR1 are respectively connected with one end of the high-voltage fuse RD. The other end of the high-voltage fuse RD serves as another port. The high-energy-capacity overvoltage absorber is good in voltage limiting effect, low in residual voltage value and good in energy gathering and energy absorbing.

A high-capacity overvoltage absorber relates to the overvoltage inhibition technical field of electric power systems. The high-capacity overvoltage absorber comprises a non-linear resistor FR1, a non-linear resistor FR2, a high-voltage fuse RD, a capacitor C and a resistor R. One end of the non-linear resistor FR2 serves as a port, and the other end of the non-linear resistor FR2 is connected to one end of the resistor R, one end of the capacitor C and one end of the non-linear resistor FR1. The other end of the resistor R, the other end of the capacitor C and the other end of the non-linear resistor FR1 are connected to one end of the high-voltage fuse RD. The other end of the high-voltage fuse RD serves as the other port. The high-capacity overvoltage absorber exhibits a good voltage limiting effect, is low in residual voltage, and has great energy collection and energy absorption functions.

The invention discloses an overvoltage suppression device. The overvoltage suppression device comprises a voltage transformer, a high-capacity overvoltage protector, a high-voltage fuse, an intelligent resonance elimination switch and a microcomputer integrated protection device, wherein one end of the high-capacity overvoltage protector and one end of a fast fuse are connected with a high-voltage isolation switch, the other end of the high-capacity overvoltage protector is connected with the ground, the other end of the fast fuse is connected with the voltage transformer, the voltage transformer is connected with the intelligent resonance elimination switch and the microcomputer integrated protection device, the microcomputer integrated protection device is connected with the intelligent resonance elimination switch, the intelligent resonance elimination switch is connected with the ground, the high-capacity overvoltage protector comprises a base, a capacitor, a compensation capacitor, a voltage regulator, a photoelectric switch and a high-voltage current limiting switch, the capacitor is arranged on the base, a detector is arranged between the capacitor and the interior of the base, the compensation capacitor is connected with the capacitor, a lightning prevention module is connected with a signal emitter, the voltage regulator is arranged at one side of the base, the photoelectric switch is arranged at one side of the voltage regulator, and the high-voltage current limiting fuse is arranged at the other side of the base.

The invention relates to a protective device of direct current power supple for communication equipment and belongs to the technical field of direct current power supply. The protective device comprises a lightning strike protection module, an over / under-voltage protection module, a wave filtering module and a DC-DC power supply module, wherein the lightning strike protection module comprises a primary protection unit, a display unit, a secondary protection unit and a protective tube FU2; the wave filtering module comprises a low-frequency wave filtering unit, a high-low frequency decoupling unit and a high-frequency wave filtering unit. In the invention, a comprehensive protection method based on the cooperation of the three modules, i.e., a reasonable design between two stages of lightning protection in which the first stage of lightning protection is used for aerial drainage and the second stage of lightning protection is used for clamping, is adopted to drain amplified lightning stroke current and to ensure a lower residual voltage value; the over / under-voltage protection of the control of a power supply management module on the power supply module is adopted to prevent the influence from input voltage jumping; meanwhile; the wave filtering mode combining the low-frequency filtered wave and the high-frequency filtered wave is adopted to effectively solve the problems of protection from lightning stoke damage in the direct current power supply for the communication equipment and high-low frequency interference.