38results about How to "Work normally for a long time" patented technology

The invention discloses a self-powered wireless temperature field measuring device in a closed rotating shaft. The device comprises a hot end tightly attached to the inner surface of the closed rotating shaft, a cold end exposed in the air and connected with a radiator, a self-powered component arranged between the hot end and the cold end and consisting of a closed loop formed by connecting n semiconductor pairs in series, an infrared transmitter for transmitting infrared signals of fixed wavelength, an infrared receiving device provided with a reference temperature sensor and a calculation and output device. By adopting a micro structure design, the device can be conveniently arranged on the inner surface of a closed shaft series part; and measurement of the radial temperature field in the high-speed closed rotating shaft is realized by self-powered wireless transmission, a power supply for supplying energy is not needed, and the measuring device can work normally for a long term under an unattended environment by using heat energy.

The invention is suitable for the field of tests of driving power supplies and provides a method for detecting welding defects of driving power supplies. The method comprises the following steps: placing the driving power supplies in a thermal shock tester, setting a first condition for a temperature shock test and carrying out the temperature shock test on the driving power supplies to detect whether the driving power supplies have design defects; placing the driving power supplies which are in working state in a constant-temperature constant-humidity box, setting a second test condition for a high-temperature high-humidity test and carrying out the high-temperature high-humidity test on the driving power supplies to detect whether the driving power supplies have design defects; screening the driving power supplies with design defects and retaining the driving power supplies without design defects so as to ensure that the detected driving power supplies can normally work for a long time.

The invention discloses a bidirectional lightning-proof wire breakage protection method and device for an insulated wire. A grounding electrode is arranged at the low-voltage end of an insulator; an insulated wire and a current guide line are arranged at the high-voltage end of the insulator; the current guide line is connected with the insulated wire in parallel through puncture wire clamps; arcstriking electrodes are arranged on the two sides of the current guide line; protection gaps are formed between the arc striking electrodes and the grounding electrode. According to the bidirectionallightning-proof wire breakage protection method and device for the insulated wire of the invention, two sides of the insulator are each provided with one discharge protection gap; when any side is subjected to lightning overvoltage, both of the discharge protection gaps act and discharge; during discharging, the two wire clamps jointly provide fault current; the insulated wire, the current guide line and the arc striking electrodes are integrated; the structures of the protection gaps are stable; and therefore, the device of the invention has the advantages of stable performance, reliable action, strong through-current capability and the like, can effectively prevent the occurrence of lightning stroke disconnection faults of the insulated wire, ensures the safety of the insulated wire, andsolves the technical problems of poor power frequency follow current capability, unstable gap distances and low reliability of a single discharge protection gap.

The physical pest killing machine consists of sub-ultraviolet ray source and light valve and features that the wavelength of the sub-ultraviolet ray source is 430-620 nm and the light valve consists of metal net electrodes and drive circuit. The positive and negative metal net electrodes are arranged alternately in one identical plane and have intermittent high frequency and high voltage electric field of 1200-3000 Hz and 2000-3500 V in between. The physical pest killing machine is operated together with low frequency electromagentic wave and supersonic wave. It can be used reliably in heavily dusty field, has long killing distance, large killing ragne and high fly pest killing effect, and can kill pests in piles and soil effectively without using fumigant and other pesticide.

The invention relates to a retaining wall water drainage system. The system comprises a retaining wall, water drainage pipes and a vertical inverse filtering water drainage body; water drainage holesare formed in the bottom of the retaining wall, the water drainage holes penetrate to the other side wall of the bottom of the retaining wall from one side wall of the bottom of the retaining wall, the water drainage pipes are arranged on the water drainage holes, the vertical inverse filtering water drainage body is fixedly arranged on the side wall, facing the soil behind wall, of the retainingwall, the vertical inverse filtering water drainage body vertically and downwards extends to the bottom of the retaining wall from the top of the retaining wall, and the vertical inverse filtering water drainage body communicates with the water drainage holes; according to the retaining wall water drainage system, after the retaining wall is completed for a certain time, even if the soil behind the wall is sunken, the vertical inverse filtering water drainage body makes direct contact with the soil, within the different depth ranges, behind the retaining wall all the time, soil on different depths is collected to the vertical inverse filtering water drainage body in a diving manner, the vertical inverse filtering water drainage body drains the water outwards through the water drainage pipes, the water accumulation behind the retaining wall can be avoided, the retaining wall is kept in the long-term normal work all the time under the light load condition, and the service life of the retaining wall is prolonged as much as possible.

The invention discloses an intelligent face recognition access control device, and belongs to the field of access control. The intelligent face recognition access control device comprises an entranceguard gate main body, wherein the upper end of the entrance guard gate main body is fixedly connected with a shell; the shell is connected with a face recognition device; a card gate machine is connected into the access control gate machine main body; a feeding cavity communicated with the card gate machine is dug in the upper end of the access control gate machine main body; two pairs of spring grooves are dug in the two ends of the upper side of the inner wall of the feeding cavity. A clamping block is slidably connected into the spring groove; a second compression spring is fixedly connected between the clamping block and the bottom end of the spring groove; a plurality of positioning clamps are clamped between the two pairs of clamping blocks and are connected with a visitor authoritymanagement system. According to the scheme, the visitor information is obtained through face recognition, the visitor information is input into the positioning card after the visitor is authorized, the visitor carries the positioning card to carry out area finding, the management of the visitor can be facilitated, the visitor entering the area can be positioned, and help seeking can be carried outin time when the visitor gets lost.

The invention discloses a modifying method for improving performance of a stainless steel pump material. The modifying method comprises the steps that the surface of a flow passage component of a stainless steel centrifugal pump is plated with a Ni-P amorphous plating film by a chemical plating technology, and the thickness of the plating film is 10-100 [mu]m. The modifying method comprises the specific steps that a test piece is subjected to pretreatment such as cleaning, alkaline washing, acid pickling, activation and pre-plating treatment; the test piece is subjected to chemical nickel-phosphorus plating treatment, the test piece is placed in a plating solution, and film plating is carried out under the environment that the temperature is 80-100 DEG C, the PH is 4.5-5.0, and the platingspeed is 12 [mu]m/h; and plating film thermal treatment is carried out, specifically, firstly, annealing dehydrogenation and stress releasing treatment are carried out at the temperature of 200 DEG C, then thermal treatment is carried out according to different performance requirements, and the temperature range is 300 DEG C-400 DEG C. According to the modifying method for improving the performance of the stainless steel pump material, bonding of the plated Ni-P amorphous plating film and a stainless steel substrate is good, when the thickness of the plating layer is 10-100 [mu]m, the hardness HV is 550-1100 ( which equals to HRC 55-72), and the bonding strength is greater than 15 kg/mm<2>; and the anti-corrosion property of the amorphous plating film is greatly better than stainless steel, and the working efficiency of the centrifugal pump is improved, and the service life is prolonged.

The invention provides a liquid temperature measuring method which is applied to a liquid temperature measuring system. The liquid temperature measuring system comprises an optical measuring system, a gas source controller, a spectrum temperature measuring instrument, a data recorder and a large-screen display, wherein the optical measuring system comprises a metal optical tube, a measuring window and an optical lens. The liquid temperature measuring method comprises the following steps: the optical measuring system collects spectrum signals of a liquid target surface in the metal optical tube, and transferring the collected spectrum signals to the spectrum temperature measuring instrument; the spectrum temperature measuring instrument converts the received spectrum signals into electric signals, converts the electric signals into temperature data, and then outputs the temperature data to the data recorder; the temperature data is displayed on the large-screen display. The liquid temperature measuring method integrates the advantages of high precision of contact-type temperature measuring and high response of non-contact temperature measuring, so that not only can the defect of low response speed caused by the thick protection pipe wall of the conventional online temperature measuring system be overcome, but also the characteristics of both high precision and high response can be achieved.

The invention discloses a square tube roller device and a square tube squaring machine applying the same, and relates to steel tube machining equipment. The square tube roller device comprises a mounting base, four rollers and four roller shafts rotationally erected on the mounting base, wherein the rollers are evenly distributed in the circumferential direction, any roller shaft is arranged in the direction of the connecting line of the corresponding roller and the circle center of the circumference in a sliding mode, and an adjusting assembly used for driving the roller shafts to move synchronously is further arranged on the mounting base; and a square tube squaring machine comprises a machine table and a plurality of square tube roller devices, wherein the square tube roller devices areevenly arranged at intervals in the length direction of the machine table, and the square tube roller device is movably and adjustably arranged in the width direction of the machine table. The squaretube roller device and the square tube squaring machine applying the same are stable in work, convenient and fast to operate, capable of conveniently producing square tubes of various sizes and specifications and beneficial to improving the production efficiency and the square tube forming quality.

The invention relates to a method for manufacturing components of a mixed flow type generating set in a power plant, namely a method for manufacturing a buoy of an air valve of a hydroelectric generating unit. The method comprises the following steps of: taking a stainless steel tube of which the diameter is equal to that of the buoy, wherein the length of the stainless steel tube is equal to thesum of the height of a round tube section of the buoy and the length of a beveled edge of a tapered section; drawing triangles side by side from the upper end to the lower end on the circumferential surface of the stainless steel tube; cutting an inverted triangle in a stripping way to obtain a spaced rack shape, and treating by using an angle grinder; vertically welding a central rod of which the upper end is provided with a central disc to a flat base steel plate and sleeving the stainless steel tube on the central rod and the central disc, wherein the diameter of the central disc is equal to that of an upper opening of the buoy and the height of the central disc is equal to that of the buoy; and heating racks through gas welding, bending the racks on the central disc in turn, performing spot welding among the racks through electric welding, taking down the stainless steel tube, connecting the racks through electric welding, and polishing to form the buoy with the upper opening. Themethod has the characteristics that: the buoy is reasonable in process, hard to rust and long in service life, and normal work of a main valve is guaranteed.

The invention discloses a building appliance, which comprises a stirring box provided with a stirring cavity and a water injection port communicated with the stirring cavity; a stirring mechanism connected with the stirring box and used for stirring materials in the stirring cavity; a filtering assembly comprising a shell, a filtering part and a moving part; the shell is provided with a water passing cavity, a water inlet communicated with the water passing cavity and a water outlet communicated with the water passing cavity; the water outlet is communicated with the water injection port; the filtering part is arranged in the water passing cavity and located between the water inlet and the water outlet, and the filtering part is further provided with a filtering hole communicated with the water inlet and the water outlet; and the moving part is arranged on the filtering part and used for moving substances located on the side, close to the water inlet, of the filtering part so that the substances can avoid the filtering hole. The building appliance provided by the invention can prevent impurities from blocking the filtering hole, and it is guaranteed that the filtering part can work normally for a long time.

The invention relates to the technical field of bus monitoring devices, and particularly relates to an efficient heat dissipation bus monitoring device. According to the technical scheme, the efficient heat dissipation bus monitoring device comprises a support, and a monitoring camera is installed on the support; one end, away from a lens, of the monitoring camera is connected with a heat dissipation box; a water box, an atomization cavity and an air draft cavity are sequentially arranged in the heat dissipation box, and one side, away from the atomization cavity, of the air draft cavity is connected with the monitoring camera; a micro water pump is included, a water inlet of the micro water pump is connected with the water box, a water outlet pipe of the micro water pump is connected withan atomizing nozzle, the atomizing nozzle is installed in the atomization cavity, an air inlet is arranged in the atomization cavity, and the atomization cavity is connected with the air draft cavity; and an exhaust fan is installed in the air draft cavity, and a plurality of cooling air holes are arranged in the side, close to the monitoring camera, of the air draft cavity. The invention provides the bus monitoring device capable of cooling the cooling air to improve cooling efficiency during air cooling, and a problem that an existing bus monitoring device is difficult to obtain reliable heat dissipation is solved.

The invention provides a modification method of improving the performance of stainless steel material. The treatment process is simple and effective, nitriding and oxidation treatment is carried out on the surface of the stainless steel material, and a compact compound layer with sufficient depth and a diffusion layer with corresponding length are formed on the surface of a workpiece, so that thewear resistance, corrosion resistance and fatigue resistance of the metal surface are greatly improved; a black oxidation film is formed on the surface of the workpiece to improve the antirust performance of the workpiece, and the workpiece appearance can be beautified; in addition, the compound layer can be oxidized to increase oxygen content of the compound layer so as to passivate the compoundlayer, so that the corrosion resistance is greatly improved, the energy consumption is reduced, and the service life of a product is prolonged; and the technology is simple, the cost is low, and the treatment technology including high-frequency quenching, carburizing and quenching, hard chrome plating, ion nitriding and the like can be substantially replaced.