52results about How to "Delayed closure" patented technology

The invention discloses an underground coal seam hydrofracture crack oriented developing method which comprises the following steps: (1) drilling into a hydrofracture drill hole and oriented drill holes, wherein the number of the hydrofracture drill hole is one, the oriented drill holes are arranged around the circumference circle at intervals, and respectively conducting water jet cutting to the hydrofracture drill hole and all oriented drill holes, wherein water jet cutting is achieved through a high-pressure water jet cutting device; (2) respectively conducting hole sealing to the hydrofracture drill hole and all oriented drill holes; and (3) conducting hydraulic fracturing to the hydrofracture drill hole. According to the underground coal seam hydrofracture crack oriented developing method, secondary disasters of a coal seam top base plate caused by disordered developing of cracks can be avoided, meanwhile, effective stress in the hydrofracture area can be reduced, closing of the cracks is retarded, flow conductivity of the cracks is strengthened, and therefore the purposes of effectively managing gas and efficiently pumping and exploiting the gas can be achieved.

A method of measuring a property of entrained gas in a hydraulic liquid received by a working chamber of a fluid working motor, wherein the said property is determined from the period of time elapsing between the closure of a first valve to isolate the working chamber and the passive opening of a second valve to bring the working chamber into fluid communication with a manifold. The property may, for example, be related to the concentration of entrained gas in the received hydraulic liquid or the compressibility or bulk modulus of the received hydraulic fluid.

The invention relates to a sodium-ion battery carbon negative electrode material prepared based on waste wood chips and a preparation method thereof. Waste wood chips are used as a biomass carbon source and subjected to pre-carbonization and low-heating-rate high-temperature carbonization treatment, metal heteroatoms are removed by washing with an acid pickling solution, and drying is performed to obtain a hard carbon sodium-ion battery negative electrode material. The waste wood chips are used as a biomass raw material, a large amount of chips generated in the production process of wood products can be fully utilized, and the material has the advantages of being environmentally friendly, low in cost and the like. A low-carbonization heating rate pyrolysis method is adopted, so that the effects of reducing defect concentration, increasing interlayer spacing and improving graphitization degree are achieved, and the electrochemical performance of the material is effectively improved. The hard carbon negative electrode material prepared by the method has relatively high first coulombic efficiency and reversible specific capacity, shows excellent cycling stability and rate capability, and is an ideal sodium-ion battery negative electrode material.

The invention relates to a preparation method of a tailings paste filling material and belongs to the technical field of filling materials. The tailings paste filling material is prepared by adding limestone powder; the limestone powder which has good filling effect enables the paste structure to be compacted, so that pore size distribution is improved, and compressive strength of concrete is improved; the limestone power features low water adsorption; compared with fly ash, mineral residue and other active mineral mixtures, the limestone powder can evidently improve pumpability of concrete under same mixing amount. The mineral residue powder is added to prepare the tailings paste filling material; the mineral residue powder is an industrial byproduct made by treating a melt formed at 1350-1450 DEG C during mineral extraction, and is a high-quality concrete admixture; the mineral residue powder has high potential activity, helps improve late strength of a mix, has high activity, and can partly replace cement, reduce hydration heat, inhibit alkali-aggregate reaction and improve durability of concrete.

The invention is directed to a method and an arrangement for controlling an internal combustion engine (20) which achieve an optimal efficiency in different operating states. An opening time of an inlet valve (5) of a cylinder (1) of the engine (20) is variably adjusted. Depending upon an operating variable, especially the engine speed, two operating states of the engine (20) are distinguished. In a first operating state, during an intake operation, an opening of the inlet valve (5) is delayed. In a second operating state, a closing of the inlet valve is delayed and carried out during a compression operation.

The invention discloses a built-in permanent-magnet synchronous motor, which comprises a stator, an armature winding and a rotor, wherein the armature winding is wound on teeth of the stator in a distributed manner; the rotor is located in a hollow cavity of the stator; V-shaped permanent magnets which are distributed along the circumferential direction of the rotor are arranged on the rotor; two ends of the permanent magnets are toward the stator; and in each permanent magnet, first magnetic barriers are arranged at two ends of the permanent magnet and magnetic barrier groups are arranged at the outer side and the inner side of the permanent magnet respectively. The built-in permanent-magnet synchronous motor solves the problems that a traditional magnetic barrier design reduces torque ripples, does not improve an output torque and only improves the performance; through multi-layer combined magnetic barriers, air-gap magnetic density distribution is improved; the torque ripples are reduced; meanwhile, the torque output capability is also improved; and the torque comprehensive performance of the built-in permanent-magnet synchronous motor is finally improved.

A rotary actuator suitable for use in a refrigerator ice-dispensing door provides a rotating shaft driven by a DC permanent magnet motor through a gear train and subject to a returning force of an internal spring. The gear train communicates with a switch to reduce current to the motor when a limit of travel is reached and a shunting path is provided around the motor to produce generative braking when power is removed from the motor and the actuator rotates backward to its initial position.

The invention discloses a cathode of microwave source and its manufacturing method, whose electron emission material is carbon fiber fabric and four-stitch nanoparticle ZnO. Mix the four-stitch nanoparticle ZnO with defined amount of terpilenol in the water by whisking, from which the sizing agent obtained can be produced on the carbon fiber fabric by thick film screen printing. Melt abio-flux under high temperature to fix the carbon fiber fabric adhered onto the stainless steel underlay, and weld it with insulated ceramic plate by transition material. The other end of the ceramic plate is welded with a projected auxiliary electrode to improve electric field distribution on the cathode surface and increase the transverse electric field of the cathode surface, which improves the generating effieciency of the secondary electron and ensure an even electronic emission of the cathode surface. The said cathode can be taken as the electron source of the high-power microwave source. In practical use for the device, pulsed voltage of hundreds of KV is applied between anode and cathode, while pulsed voltage or DC voltage of 5,000 to 10,000 KV is applied between auxiliary electrode and cathode.

A sensor case for attachment to laces of a shoe, includes a flexible body to be inserted between the laces and the shoe in an open condition and manipulated into a folded-over and closed condition surrounding and secured to the laces. The folded-over and closed condition defines an interior of the body. A pouch is integral with the body for receiving a sensor. A fastener secures the body in the folded-over and closed condition with the pouch in the interior of the body. A method for attaching a sensor to a shoe is also provided.

The invention discloses a shale gas well wellhead pressure control method and a control system thereof. The control method comprises the steps that S1, the ratio A of pipeline return pressure to wellhead oil pressure and the current critical flow pressure ratio of a gas well wellhead are calculated; S2, whether the ratio A is smaller than a critical flow pressure ratio or not is judged, if yes, the step S3 is entered, and if not, the step S5 is entered; S3, the wellhead pressure of the shale gas well is collected according to the set frequency, and the pressure difference between the wellheadpressure and the initial wellhead pressure is calculated; S4, the opening degree of an oil nozzle valve is adjusted according to the relation between the pressure difference and the pressure drop boundary, and then the step S1 is executed again; S5, wellhead oil pressure and pipeline back pressure are collected according to a set frequency within a set time, and an oil pressure average value and aback pressure average value of the wellhead oil pressure and the pipeline back pressure within the set time are calculated; and S6, a ratio B between the oil pressure average value and the return pressure average value is calculated, the opening degree of the oil nozzle valve is adjusted according to the relation between the ratio B and the boundary of the critical flow pressure ratio, and then the step S1 is executed again.

A fluid-working machine has a working chamber of cyclically varying volume, high and low pressure manifolds, and high and low pressure valves for regulating the flow of fluid between the working chamber and the high and low pressure manifolds respectively. A controller actively controls at least one said valve to determine the net displacement of working fluid of the working chamber on a cycle by cycle basis. At least one said valve is a variable timing valve and the controller causes the valve to open or close at a time determined taking into account one or more properties of the performance of the fluid working machine measured during an earlier cycle of working chamber volume.

Threaded pipe joint comprising a male element (1) and a female element (2), threaded and provided with respective complementary sealing surfaces, which define, when screwed together, a notch (13) formed on the female element (2) of a predetermined length (X), and a space (7, 8) between the threads of predetermined section (S), forming reservoir to house the joint lubricant, which comes out of the volume between the threads of the female (2) and male (1) elements during the tightening of the joint.

The invention discloses a rice cultivation planting method, which is technically characterized in that: the cultivation row space is 40 to 90cm, the distance between plants in a row is 15 to 50cm, the number of seedlings per hole is 7 to 12, and the basic number of seedlings per mu is 140,000 to 240,000. By wide row planting, the method has the advantages of making crops ventilated and pervious, enhancing photosynthesis, contributing to the growth and development of the crops at the later stage, improving the utilization rate of solar energy, increasing yield, and producing rice organic foods with pure grade.

The invention relates to a clamping mechanism. The upper side of a panel is fixed with a button seat, and the lower side is fixed with a clamping head; the button seat is connected with a button with a guide post; a side plate is fixed with a base, a cover plate is fixed to the base, and a connecting piece is arranged between the base and the cover plate; the upper part of the connecting piece is connected with a left and right gripping heads, and the lower part is connected to the base through a spring a; the left and right gripping heads are respectively provided with a flange which is clamped at the base; and the flange and the base are connected together through a spring b. When the panel moves downward to drive the clamping head, after the inclined surface of the clamping head contacts the gradient slopes on the left and right gripping heads, the left and right gripping heads are respectively opened to rotate by 14-16 degrees under the action of thrust; after the clamping head is limited by the panel, the left and right gripping heads respectively rotate back to the initial closed state to buckle the clamping head; after the button is pressed, the guide post can move downwards, so that the connecting piece moves downwards so as to drive the opened left and right gripping heads to be closed, and the clamping head can be ejected by using the closing force of the left and right gripping heads.

The invention relates to a method for controlling an electrically controllable suction valve (1) for controlling the delivery rate of a high-pressure pump (2) in a fuel injection system, in particular a common-rail injection system, of an internal combustion engine. According to the invention, the suction valve (1) is controlled at least at the start of the internal combustion engine as a function of at least one parameter influencing the lubrication conditions in a power unit chamber (3) of the high-pressure pump (2).

The surface enamel spraying technology for the metal pot comprises the following steps that S1, outer sanding is conducted, specifically, bumping damage on the surface of a metal base material is repaired to be smooth through a scouring wheel under high-speed rotation of a sanding machine; s2, oil removal: performing oil removal treatment on the surface of the to-be-treated pan body by using a degreasing agent in a spraying state; s3, spraying enamel slurry: atomizing and coating the enamel slurry on the surface of the pot body to be treated through a spray gun; the enamel slurry comprises the following components: enamel glaze, inorganic pigment, spherical aluminum oxide, spherical silicon carbide, a suspending agent and purified water; and S4, heating and curing: heating the pot body coated with the enamel slurry to form a texture coating film on the surface of the aluminum base material.

The invention discloses an image sensor and a forming method thereof. The method comprises the following steps: providing a semiconductor substrate, wherein a hard mask layer is formed on the back ofthe semiconductor substrate, and a front structure is formed on the front of the semiconductor substrate; forming a graphical mask layer, and etching the hard mask layer according to the mask layer soas to form an etching groove, wherein the etching groove runs through the hard mask layer, the side wall of the etching groove comprises an upper side wall and a lower side wall which are connected vertically, and the included angle between the upper side wall and the surface of the hard mask layer is an obtuse angle; taking the mask layer as a mask, and etching the semiconductor substrate so that the etching groove runs through the semiconductor substrate; forming a dielectric layer, wherein the bottom and the side wall of the etching groove are covered with the dielectric layer, and the hard mask layer is covered with the dielectric layer. Through the scheme, the possibility of the cracking problem for the hard mask layer can be reduced.

A method is provided for operating a drive unit for a hybrid vehicle. Through a planetary transmission, an electric motor is coupled to an input shaft of a first sub-transmission and an input shaft of a second sub-transmission shifted in parallel to the first sub-transmission. Through a frictional-locking separating clutch, an internal combustion engine is able to be coupled to the input shaft of the first sub-transmission and, if the separating clutch is locked, is coupled to the same element of the planetary transmission together with the input shaft of the first sub-transmission. For coupling the internal combustion engine at the output coming out of all-electric driving, the torque provided by the internal combustion engine is transferred through the slip-controlled separating clutch in order to unload the previously locked shift element and disengage it in the unloaded state.

The invention provides a control method, an electric transmission system and an electric locomotive. The control method provided by the invention is applied to an electric transmission system of the electric locomotive, each traction converter of the electric transmission system comprises at least two groups of traction devices, and each group of traction devices drives a permanent magnet synchronous motor through a rectification module, a direct current module, an inversion module and an isolation contactor which are electrically connected in sequence. Firstly, a clamping result is determinedaccording to the current working state of the isolation contactor; a traction fault result is determined according to the current working state of the traction device; a control mode is determined jointly by combining the current speed interval of the electric locomotive; corresponding modules of the electric locomotive are controlled according to the control mode; therefore, the influence of high counter electromotive force on the electric transmission system is effectively suppressed based on various actual working conditions of the electric locomotive and the electric transmission system thereof, extra system loss is not caused, frequent control of an isolation contactor is avoided, the service life of the isolation contactor is prolonged, and the safety and reliability of the system are improved.

The invention relates to protective clothes for medium and low altitude operation. The protective clothes comprise a telescopic silk round leg protection kneecap and a square leg protection kneecap reserved pocket, wherein a square health-care filling piece is arranged in the square leg protection kneecap reserved pocket; the square health-care filling piece is provided with a first magnet, a second magnet and a third magnet; the first magnet, the second magnet and the third magnet are arranged on reflection regions corresponding to a knee eye acupuncture point, a Yinlingquan acupuncture pointand a Zusanli acupuncture point of a knee shank part of a human body. By adopting the protective clothes provided by the invention, the growth of leg bones of teenagers can be promoted and partial damages and cold-caused lesions of legs and knees are prevented; the square health-care filling piece and magnetic bodies of the leg protection kneecap can massage reflection region acupuncture points of the legs, the knees, splenic organs and the like, so that blood circulation of the legs and the body is promoted, the sleep quality at night is improved, the nutrient absorption is enhanced, the metabolism is accelerated, the closing of skeletal cartilage lines is delayed, osteoporosis is prevented and a warm-keeping effect is realized.

The invention discloses a spontaneous breathing type airbag sole. The spontaneous breathing type airbag sole comprises an inner sole and an outer sole, wherein a sandwich cavity is distributed betweenthe inner sole and the outer sole at interval, and is formed by supporting of a plurality of pairs of bosses abutting against respective cavity walls at the opposite sides and respectively distributed on the wall surfaces of two opposite cavities. The spontaneous breathing type airbag sole disclosed by the invention has the advantages that a pair of opposite surfaces is formed on the lower side surface of the inner sole and the upper side surface of the outer sole, the plurality of bosses are respectively distributed on the two opposite surfaces and form the sandwich cavity in a supporting manner between the two opposite surfaces, and due to the factor that the bosses select elastic materials for the sole, the bosses are extruded and reset in pressing during walking of a human body, so that the sandwich cavity is closed and opened, and air in the sandwich cavity enters and exits from exhausting holes on the sole; and due to spontaneous ventilation and moisture removal can be achieved,the spontaneous breathing type airbag sole can play a good role in preventing beriberi.

The invention relates to a segmental pressure elastic leg protector. The leg protector comprises a telescopic silk round leg and knee protector and a square leg and knee protector reserve pocket whichis provided with a square health care filling piece, a first magnet, a second magnet and a third magnet are arranged on the square health care filling piece, and the first magnet, the second magnet and the third magnet are arranged in reflection areas of the Xiyan point, Yinlingquan point and Zusanli point which correspond to knee and shank parts of the human body respectively. Accordingly, the leg bone growth of teenagers can be promoted, the phenomenon that the leg and knee are damaged and suffer from cold lesions is prevented, the square health care filling piece of the leg and knee protector and a magnetic body can well massage reflection area points of the legs, knees, spleens and the like, and then blood circulation of the legs and bodies is promoted; the night sleep quality is deepened, nutrient absorption is enhanced, metabolism is accelerated, skeletal cartilaginous line closure is delayed, and the effects of preventing osteoporosis and keeping warm are achieved.

The invention discloses healthcare physiotherapy earmuffs. Each healthcare physiotherapy earmuff comprises a foot arch pad body, a sweat absorption and damping interlayer and a bottom foot arch support, wherein a first magnet, a second magnet, a third magnet, a fourth magnet and a traditional Chinese medicine filling bag are arranged in the sweat absorption and damping interlayer; and the fourth magnet is located in the Yongquan acupoint of the foot sole. The healthcare physiotherapy earmuffs have the following advantagesthat only foot arch pads need to be cushioned in the shoes, the feet stepon the foot arch pads, and the foot arch pads can naturally fit the foot soles, so that the earmuffs are very comfortable and practical; in a walking process, the outer sides of the foot arch pads are filled with the traditional Chinese medicine filling bags and the magnets, so that the acupoints of leg and spleen reflective areas and other reflective areas of the foot soles can be well massagedand stimulated, the gravity when the feet touch the ground is balanced, the blood circulation is promoted, the night sleep quality is improved, the nutrition absorption is enhanced, the metabolism isaccelerated, the closing of skeletal cartilage lines is delayed, the osteoporosis is prevented, the growth of the human body is promoted, and the bone deformation of the feet is prevented; and the earmuffs have the effects of deodorization, sterilization, sweat absorption, health care and the like at the same time.