179results about How to "Prevent cascading" patented technology

The invention discloses an electromagnetic door lock of electrical equipment. The electromagnetic door lock comprises a slider block device, a starter, a mechanical sensor and a mechanical linkage device, wherein the slider block devices is moved to a closing position along with shutoff of a door of the electrical equipment, the starter is used for providing power for switching on and switching off a switch device, the mechanical sensor is used for determining the closing position of the slider block device (20), when the slider block device is not located at the closing position, the starter is locked by the mechanical linkage device, and when the slider block device is located at the closing position, the starter is released by the mechanical linkage device, so that the switch device is located at a switch-on position. The mechanical sensor and the mechanical linkage device not only control the electromagnetic door gate in use of the electrical equipment, but lock movable components in the electromagnetic door gate in a transportation process so as to prevent the movable components from playing in the transportation process, and avoid from causing the components of the electromagnetic door lock in an abnormal state.

The invention discloses an absorption compression type automatic-overlapping refrigerating system and a use method. The absorption compression type automatic-overlapping refrigerating system comprises a generator and the like; the generator is communicated with a solution heat exchanger which is communicated with an absorber; the absorber is further communicated with the solution heat exchanger which is communicated with the generator; the generator is communicated with a condenser which is communicated with a gas-liquid separator; the gas-liquid separator is further communicated with an evaporative condenser which is communicated with a first gas-liquid heat exchanger, the first gas-liquid heat exchanger is communicated with an evaporator which is communicated with the first gas-liquid heat exchanger, and the first gas-liquid heat exchanger is communicated with the evaporator which is communicated with the first gas-liquid heat exchanger communicated with a compressor; the gas-liquid separator is communicated with the evaporative condenser; the compressor and the evaporative condenser are communicated with the absorber.

The invention is applicable to the field of new materials and provides a graphene/nickel composite material, a preparation method thereof, an electrode plate and a capacitor. The preparation method comprises the steps of preparing graphite oxide, preparing a graphene oxide/nickel composite material, preparing the graphene/nickel composite material, and the like. In the preparation method of the graphene/nickel composite material, the graphene oxide and the foamed nickel are combined through an ultrasound mode to obtain the graphene/nickel composite material, so that the problems of lamination and agglomeration of the graphene oxide are effectively alleviated, and the energy storage property of the graphene/nickel composite material is also greatly improved. According to the preparation method of the graphene/nickel composite material, the graphene is uniformly adhered in a gap of the foamed nickel, so that the problems of lamination and agglomeration of the graphene are effectively prevented, and the energy storage property of the graphene is greatly improved.

The invention discloses a method for measuring the dimensions of specially-shaped conductor parts, which comprises the following steps: firstly, preparing a mandrel with the corresponding diameter according to the inclination aperture of the part to be measured, wherein one end of the mandrel is provided with an inclined plane intersecting with the mandrel end face, the intersecting line of the two planes passes through the diameter of the mandrel, and the angle of the inclined plane is in accordance with the inclination angle of the central line of an inclination hole of the part to be measured; secondly, connecting a limiting plate to the mandrel end face intersecting with the inclined plane of the mandrel; thirdly, placing the part to be measured on a detecting platform, inserting the mandrel along the inclination hole of the part, using the limiting plate to cause the end face having the inclined plane of the mandrel to superpose with the end face of the inclination hole of the part to change the inclined plane of the mandrel into a plane, and leading out the intersection point, namely an imaginary point D, of the end face of the inclination hole of the part and the central line thereof; and finally, using a measuring head of a height gauge to approach the intersecting line of the mandrel end face and the inclined plane so as to measure the height dimension H of the part. The method transforms the measurement imaginary point D of the part into a measurable point so as to satisfy the space and angle dimensions of the specially-shaped conductor of an isolating switch which cannot be measured by the prior method.

The invention belongs to the field of electrochemical materials, and discloses a graphene/polythiophene derivative composite material as well as a preparation method and application thereof. The preparation method of the composite material comprises the following steps of: preparing graphite oxide; preparing a mixed solution of graphene oxide and thiophene derivative monomer; preparing the graphene/polythiophene derivative composite material; and purifying the graphene/polythiophene derivative composite material. The prepared graphene/polythiophene derivative composite material has the advantages of good discharge performance, long cycle life, high thermal stability and the like.

The invention discloses an internal-model-based sliding mode control method capable of inhibiting mismatching disturbance of a permanent magnet linear motor. The internal-model-based sliding mode control method includes the steps that a five-phase fault-tolerant permanent magnet cylindrical linear motor model with mismatching disturbance is set up; an internal model controller of an ideal system is designed by adopting an internal model control strategy; based on the motor second-order mathematic model, mismatching disturbance observers are designed to observe mismatching disturbance of a motor system; two kinds of mismatching-disturbance-based observers are designed, the sliding mode control rules (the symbol is shown in the description) of the system under the two methods are solved; the expression (the symbol is shown in the description) is equivalently transformed to contain system mismatching disturbance errors, the Lyapunov function is selected, and the obtained sliding mode control rules (the symbol is shown in the description), a d-axis voltage set value (the symbol is shown in the description), an x-axis voltage set value (the symbol is shown in the description) and a y-axis voltage set value (the symbol is shown in the description) are used for achieving high-performance operation of the internal-model-based sliding mode control system capable of inhibiting mismatching disturbance of the fault-tolerant permanent magnet cylindrical linear motor by means of a voltage source inverter through a CPWM modulation method, wherein the d-axis voltage set value, the x-axis voltage set value and the y-axis voltage set value are output by a PI current regulator.

The invention relates to a three-dimensional graphene and nanometer titania composite photocatalyst and a preparation method thereof. The method comprises the following steps that 1, a 1.0 mg/mL-10.0 mg/mL aqueous graphene oxide solution is prepared; 2, nickel foam is taken and soaked in the aqueous graphene oxide solution, ultrasonic treatment is conducted, a nickel foam material loaded with graphene oxide is prepared, the material is dried, and a three-dimensional graphene oxide material is obtained; 3, haloid acid and titanium tetrachloride are sequentially dissolved in absolute ethyl alcohol, the three-dimensional graphene oxide material obtained in the second step is soaked in the solution, a reaction is conducted under the condition of 100 DEG C to 200 DEG C, heat preservation is conducted for 1 h to 6 h, cooling, separating, cleaning and drying are conducted, and the three-dimensional graphene and nanometer titania composite photocatalyst is obtained. The method inhibits lamination and irreversible agglomeration of graphene in the preparation process and greatly increases the specific surface area of graphene and the electron transmission rate, the size and morphology of obtained nanometer titania are controllable, and the photocatalytic effect of the photocatalyst is improved.

An adjusting device of a microwave antenna comprises a supporting member hinged via a first hinge shaft and a mounting member for connecting the microwave antenna, wherein, the supporting member is equipped with a first worm. The adjusting device also comprises a first worm wheel cooperated with the first worm and fixed with the mounting member, the rotary axis of the first worm wheel is overlapped with the axis of the first hinge shaft, and the adjusting device also comprises a first driving device for driving the first worm. The adjusting device drives the mounting member to rotate relative to the supporting member via a worm and worm wheel mechanism so as to drive the microwave antenna to rotate connected with the mounting member, being simple in operation. And the worm and worm wheel mechanism is in linear transmission, the position adjustment of the microwave antenna is a linear adjustment, and the change of the microwave signal is continuous, has no jumping and is high in adjustment precision. In addition, the adjustment of the worm and worm wheel mechanism is stable, relative to a threaded rod driving in the prior art, the scheme does not employ a threaded rod, and does not need to process an excessive through hole, thereby avoiding a signal compulsion generated by fastening bolts at the two sides of the excessive through hole.

The invention relates to a substrate integrated multi-mode filter which is based on a square high-order mode cavity, the upper surface and the lower surface of a medium substrate (1) are respectively coated with an upper surface metal (7) and a lower surface metal (8), a metalizing through hole array (2) penetrates the medium substrate (1), the upper surface metal (7) and the lower surface metal (8); a first inductive column (3) and a second inductive column (4) which can play the roles of regulating the eigenfrequency of different modes and coupling between the modes are positioned in a square cavity which is surrounded by the metalizing through hole array (2); a first metal column inductive window (7) and a second metal column inductive window (8) are respectively arranged on the adjacent two sides of the square cavity, the cavity can realize the coupling of the input and the output of energy by metal column inductive windows; a first metalizing through hole array (5) and a second metalizing through hole array (6) are respectively positioned at the first metal column inductive window (7) and the second metal column inductive window (8) to be corresponding to the input and the output of the cavity of the filter, which are connected with an external circuit.

The invention relates to a bus skeleton. The bus skeleton comprises a front wall, a back wall, a left wall, a right wall and a top wall, wherein the front wall, the back wall, the left wall, the right ball and the top wall are combined to form a cuboid bus skeleton. The bus skeleton has the following advantages: the bus skeleton adopts an all-aluminum structure to largely reduce the body weight. A stand column 1 and a stand column 2 of the bus skeleton both extend to the outer sides to take arc shapes, so that the outline is more smooth, and the product beauty is enhanced; a strengthened structure of the bus skeleton can improve the stability of the front wall; a triangular structure enables the structural strength of the front wall to be further enhanced; a protection structure of the bus skeleton can improve the safety; three edges of a rectangular frame B of the bus skeleton are all arched, so that the outline is more smooth, and the product beauty is promoted; and the strengthened structure of the bus skeleton can improve the stability of the front wall.

The invention relates to a generator rotor protective ring blocked type insulating cylinder structure, comprising a generator rotor insulating ring, a high strenghth epoxy glass cloth plate, a DDS plate compound four fluorine muslin delaine and an ebonite pin, which is characterized in that, when assembling the blocked type insulating cylinder, only the blocked type insulating cylinder is packaged on the rotor winding, the power plant is on-site exchanged without dismounting the coupling. The invention has advantages of high mechanical strength, good electric insulating performance, reliable operation while manufacturing, assembling or dismounting conveniently, can allow the coil freely telescopic and reduce the cost and the production cycle.

The invention relates to a pre-twisted anti-slip damping spacer bar. It includes a bracket and a wire clip, the wire clip is arranged at the end corner of the bracket for connecting the split wire, and the wire clip also includes a pre-twisted wire; the head end of the wire clip used to connect the split wire is hook-shaped, The back of the hook is provided with a positioning structure for positioning the pre-twisted wire; the tail end of the clamp is connected to the corner of the bracket through a damping and limiting device. The invention can be installed by bare hands, has the advantages of convenient installation, good reliability and easy control of installation quality.

The invention discloses a positioning device for wall hanging pieces of flat-panel televisions, comprising a wall hanging fixed mount capable of being fixed on wall, a wall hanging connecting mount capable of being fixed with the flat-panel television and a limit button, wherein the limit button is movably locked between the wall hanging fixed mount and the wall hanging connecting mount and is produced by elastic materials. The wall hanging connecting mount is embedded on the wall hanging fixed mount, the bottom of the wall hanging fixed mount is equipped with a supporting plate which is used to support the wall hanging connecting mount, the bottom of the wall hanging connecting mount is equipped with a bottom plate which is used to match the supporting plate laid on the wall hanging fixed mount, the limit button is movably blocked on the bottom plate of the wall hanging connecting mount, the limit button is equipped with a draw-in gear which can rotate transposition between locking position and unlocking position under external force, and the draw-in gear in the locking position is pushed against the bottom surface of the supporting plate of the wall hanging fixed mount. After employing the structure, the flat-panel television after being installed is moved in chain, which can be prevented effectively, simultaneously, the invention has the advantages of fine positioning effect, fine operating performance and being unlimited by small wall hanging installation space.

The invention discloses an internal-expanding type beveling machine. The internal-expanding type beveling machine comprises a long inner central spindle, a short inner central spindle, an outer central spindle sleeve, a main shaft sleeve and a shell. The long inner central spindle and the short inner central spindle are embedded into the outer central spindle sleeve, the outer central spindle sleeve is sleeved with the main shaft sleeve located inside the shell, and trapezoid threads are arranged on the external surface of the rear of the outer central spindle sleeve, wherein a guiding groove is formed in the middle and the rear of the outer central spindle sleeve. At least three inclined guiding grooves are formed in the end, backing on to the long inner central spindle, of the short inner central spindle, and an expanding wedged block is inserted into the inclined guiding grooves. A cutter head base is arranged on the front end face of the main shaft sleeve, a tool disc is fixed to the front end face of the cutter head base, a pushing nut is connected with the external surface of the long central spindle sleeve through threads and makes contact with the rear end face of a rear end cover, the rear of the rear end cover is sleeved with the front of the pushing nut, the pushing nut is connected with the rear end cover movably through a groove and balls, and a curved surface handle is fixedly installed at the rear of the pushing nut. Automation of a steel tube punching beveling machine is achieved, and the internal-expanding type beveling machine is simple in structure and convenient to operate, and cuts steel tube inner and outer beveled edges at a time.

The invention relates to the technical field of pipe machining, and discloses a plastic pipe port flanging process. The plastic pipe port flanging process comprises the technological flows of: (S1) clamping of a plastic pipe; (S2) arrangement of the heating device; (S3) arrangement of the flanging device; (S4) heating of a pipe port; (S5) flanging molding; and (S6) cooling and surface treatment. Compared with the prior art, the plastic pipe port flanging process changes a heating mode to heating from internal of plastic, so that the heating becomes more uniform, the uniform heating of the inner wall and the outer wall of the pipe port is realized, the softening effect is better, and the breakage of the pipe port in reflanging is prevented.

The invention discloses a rigidity-adjustable water lubricating stem bearing. The stem bearing comprises a bearing sleeve, bearing supports and rigidity-adjustable bearing bushes. Each rigidity-adjustable bearing bush is of a flexible structure with an airtight cavity. The rigidity-adjustable bearing bushes are fixedly connected in the bearing sleeve through the bearing supports. The rigidity-adjustable bearing bushes are distributed in the circumferential direction of the bearing sleeve. The surfaces of the rigidity-adjustable bearing bushes are higher than the inner diameter surface of the bearing sleeve. A flow partition water groove is formed between every two adjacent rigidity-adjustable bearing bushes. The rigidity-adjustable bearing bushes can be used for adjusting the rigidity of the bearing in the manner that high-pressure gas is changed in and discharged from the airtight cavities of the rigidity-adjustable bearing bushes. By means of the rigidity-adjustable water lubricating stem bearing, the problems that the maintenance period is long and the maintenance workloads are large when an existing water lubricating stem bearing is replaced or maintained, and the rigidity of the water lubricating bearing cannot be adjusted to adapt to vibration of a stem shaft system can be solved.

The invention provides a wake flow bubble detection optical system which comprises a piece light source, a front set lens and rear set lenses. The rear set lenses are connected with a switching mechanism. The piece light source and the front set lens are placed in a same light path, the number of the rear set lens is multiple, and the rear set lenses are switched through the switching mechanism to enable one set of rear set lens and the front set lens to be correspondingly placed in the same light path. The wake flow bubble detection optical system can achieve subsection shooting of 10-500 micrometers, and small bubbles in wake flow larger than or equal to 10 micrometers can be shot clearly.

The invention discloses a self-locking check bolt. The bolt comprises a bolt head, a bolt rod, a check disk and self-locking ejecting rods, wherein ejecting rod screw holes are formed in the bolt head; the self-locking ejecting rods are mounted in the ejecting rod screw holes; the bolt rod is arranged at the bottom of the bolt head and is sleeved with the check disk; ejecting rod positioning holes are formed in the check disk; and bottom ends of the self-locking ejecting rods penetrate through the ejecting rod positioning holes. The bolt can realize the self-locking check effect in various environments and is simple in structure, high in production efficiency, convenient to operate, high in universality and beneficial to market promotion and application.