85results about How to "High sealing requirements" patented technology

Disclosed is a sealing method of a high sealing quasi-horizontal drilling hole, which is particularly applied to the operation of mechanical grunting and sealing of a quasi-horizontal drilling hole in underground coal mines. The sealing method of the invention adopts a way of two-stage grunting to seal a quasi-horizontal drilling hole. For a gas drainage hole, the steps are: first plugging the front end and the rear end of a gas drainage pipe by using a bagged double composite sealing material, then starting a grunting pump and pumping seriflux of the sealing material into the gas drainage hole through a first time grunting pipe; waiting until the seriflux grunted at the first time is solidified and an interspace emerges on the upper portion of the gas drainage hole because of the self contractility of the grunted seriflux; and pumping the seriflux of the sealing material a second time into the interspace on the upper portion of the gas drainage hole and the fractured coal body adjacent to the hole through a second time grunting pipe. The sealing method provided by the invention enables the grunted seriflux to effectively seal the inner space of a drilling hole and the fractured coal body surrounding the hole, realizing the maximization of space and crack sealing and meeting the requirement of high sealing. Besides, the sealing method merits in easy operation and low cost.

The invention relates to an in-situ exploitation flow-heat transfer experiment device for compact oil shale, and belongs to the technical field of experiment measuring instruments. The device comprises a flow-heat transfer core holding unit, an axial-confining pressure injection system, an axial-radial pressure stabilizing system, a temperature-strain monitoring system, a liquid cooling circulating system, a safety backflow preventing system, a flow monitoring system, a gas collection-recovery system and a control and data recording system cooperating with each other. According to the device,a thermal fluid medium with pressure is injected into a core with a fracture in the flow-heat transfer core holding unit, and axial and radial strains are observed to determine a critical temperaturepoint that the fracture in the core closes up under the condition of heat injection and critical pressure that the fracture is opened again under the pressurizing condition of the thermal fluid mediumin the later period, and thereby, closure critical parameters of the fracture during in-situ exploitation are obtained; and the permeability variation situation of the core with the rock mass fracture can be evaluated through the conditions of flow before changes and flow after changes, and thereby, reservoir fractures effectively communicate for a long term by regulating site construction parameters to facilitate heat injection and oil and gas migration in the later period.

The invention discloses a front mixing grinding material jet-flow continuous feeding system. The front mixing grinding material jet-flow continuous feeding system comprises a main water tank, a high pressure pump, a low pressure pump, a continuous feeding system, and a mixing chamber, wherein one end of the main water tank is communicated with the high pressure pump; an outlet of the high pressure pump is connected with an inlet of the mixing chamber; an inlet of the low pressure pump is connected with the inlet of the mixing chamber through the continuous feeding system; the continuous feeding system comprises a feeding system and a pressurization system; the feeding system is communicated with the pressurization system; an outlet of the mixing chamber is communicated with a nozzle. The front mixing grinding material jet-flow continuous feeding system realizes the truly significant continuous feeding, overcomes the phenomena that the continuous working time is short and the grinding material is short of supply in the working process, can greatly improve the working efficiency and the work quality of the system, and facilitates industrialized popularization of the front mixing grinding material jet flow technology; secondly, the difference between the piston areas on the two sides of a piston rod can play the pressurization effect.

The invention discloses a special sealing device for a cylinder body of a high-temperature rotary kiln. The special sealing device comprises a first gland fixedly connected with a discharging box, a second gland connected with one end of the first gland far away from the discharging box, and sealing fillers, wherein the sealing fillers are filled in a sealed space between the inner wall of the first gland and the cylinder body of the rotary kiln and are clamped by the first gland and the second gland; one end of the first gland close to the second gland is provided with a first flange extending outwards; one end of the first gland close to the discharging box is provided with a first protrusion part extending inwards; the second gland is provided with a second flange extending outwards and a second protrusion part extending to the sealed space; and the first flange and the second flange are connected through a filler clamping mechanism, and when the filler clamping mechanism is screwed down, the second gland can move axially along the surface of the cylinder body of the rotary kiln. The special sealing device disclosed by the invention has the advantages of being good in sealing effect, reducing the temperature on a sealed surface, and prolonging the replacement cycle of the fillers, and the sealing fillers are easy to maintain.

The invention relates to a control device for a brake system of a vehicle (10; 92; 132; 238), said vehicle (10; 92; 132; 238) having a supporting structure (222; 240) and a cabin (224; 242) that is supported by the supporting structure (222; 240) and has at least one driver's seat (226). The control device is located outside the cabin (224; 242) on the supporting structure (222; 240) and the control device has additional functionality for controlling an electronic air spring system.

The invention discloses a pressure transducer and a preparation method thereof. The pressure transducer comprises a circuit board, a chip, a shell and a gel. The side of the circuit board is provided with an inward concave curved sides and a circuit board bonding pad and a location hole. The chip is arranged on the lower part of the circuit board. The shell is provided with a first mounting groove, and the chip is arranged in a second mounting groove which is arranged in the bottom of the first mounting groove. An air hole is arranged in the bottom of the second mounting groove. The circuit board is arranged in the first mounting groove; steps are arranged around the notch of the second mounting groove; a groove is arranged on the periphery of the steps and is filled with silica gel. A registration mast is adapted with the location hole of the circuit board. A contact pin bonding pad is arranged at the shell. The contact pin bonding pad is bonded with the circuit board through aluminium wire bonding wire. The first mounting groove is filled with the gel. The transducer has the advantages of good anti-corrosive properties, good long term stability and high overload capability.

The invention discloses a gas sensor testing device and a testing method. The testing device comprises a gas distributing device, a gas supply device and a signal collection device, wherein the gas distributing device is used for distributing and providing gas for testing; the gas supply device is used for distributing tested gas and comprises a gas inlet plate and a gas outlet plate; the gas inlet plate and the gas outlet plate are connected into a whole body in a sealed way, so that a cavity is formed in the interior between the gas inlet plate and the gas outlet plate; the gas inlet plate is provided with a gas inlet used for being communicated with the cavity and the air distributing device; the gas outlet plate is provided with a plurality of gas outlets used for being communicated the cavity and an inlet of a gas sensor; the signal collection device is used for collecting inductive signals of the gas sensor. The testing device can realize rapid testing and batch detecting of the gas sensor, and saves the gas for testing.

The present invention discloses a tenofovir disoproxil fumarate analog preparation method, which comprises: carrying out a substitution reaction on adenine as a raw material and (R)-propylene carbonate in the presence of an alkali, carrying out a substitution reaction with (diethoxyphosphoryl)methyl-4-methylbenzenesulfonate, hydrolyzing with a concentrated hydrochloric acid solution, crystallizingto obtain anhydrous tenofovir, carrying out a reaction on the anhydrous tenofovir and chloromethyl isopropyl carbonate to obtain tenofovir monoester, and carrying out a reaction with 2-bromopropane to obtain the target compound. According to the present invention, the selected starting raw materials are inexpensive and easy to obtain, the process is simple, and the material utilization rate and total yield are improved; and the intermediate of the method is purified by re-crystallization, such that the yield is high, and the purity is high.

The invention provides a power module of a SIC electric automobile. The power module comprises a SIC MOSFET device, a radiator, a low-inductance busbar, a capacitor core group, a driver, a sensor anda hydroelectric terminal; the power module is sequentially provided with the radiator, the SIC MOSFET device, the driver and the capacitor core group from bottom to top; the capacitor core group is electrically connected with the SIC MOSFET device and is arranged above the SIC MOSFET device; the driver is installed and fixed on an auxiliary terminal of the SIC MOSFET device through welding; and each component of the power module is formed by integrally packaging and filling through an epoxy resin three-layer filling and sealing technology, and a metal shell is not needed. According to the power module, a motor control unit (MCU) is detached and separated, and the motor control unit and the power module can be installed together to serve as a complete automobile controller according to therequirements of a vehicle factory in an application, and the function of the motor control unit can be integrated into a vehicle control unit (VCU) by the vehicle factory and the power module is onlyused as an execution part for use by the vehicle factory.

The invention relates to a large-caliber ultrahigh-pressure differential steam emptying valve. The large-caliber ultrahigh-pressure differential steam emptying valve comprises a valve body, wherein aself-sealing valve seat is arranged in the valve body, a maze sleeve and a pressing ring are sequentially connected to the self-sealing valve seat, and the pressing ring, the maze sleeve and the self-sealing valve seat are pressed in the valve body through a pressing four-split ring; the upper end of the valve body is connected to a valve cover pressing plate, a self-sealing valve cover is arranged in the valve cover pressing plate in a penetrating mode, the sealing end of the self-sealing valve cover is connected to the valve cover pressing plate through a valve cover adjusting bolt and a valve cover nut, and a valve cover self-sealing ring is arranged between the sealing end and the valve body; and a valve cover four-split ring which is located on the upper side of the sealing end of theself-sealing valve cover is arranged in the valve body, a stepped valve element is arranged in the pressing ring, the maze sleeve and the self-sealing valve seat, a valve element sealing mechanism isarranged on the outer side of the stepped valve element, the upper end of the stepped valve element is connected to a valve rod, the valve rod penetrates through the self-sealing valve cover to extend to the outside, and the valve rod and the self-sealing valve cover are sealed through a valve rod sealing mechanism. According to the large-caliber ultrahigh-pressure differential steam emptying valve, the valve seat is detachable, mounting and maintaining are convenient, operation is stable, and sealing is firm.

The invention provides a sand conveying and mixed discharging system and a control method. The sand conveying and mixed discharging system comprises a mixed discharging device, the structure of the mixed discharging device is characterized in that a feeding hopper is arranged at the top of a tank body, a main shaft is vertically arranged in the tank body by penetrating the feeding hopper, the mainshaft is connected with a driving device driving the main shaft to rotate, a booster impeller is arranged below the feeding hopper, the booster impeller is fixedly connected with the main shaft and rotates along with the main shaft, a top opening is formed in the middle of the top of the booster impeller, the bottom of the feeding hopper communicates with the top opening, a side wall opening is formed in the side wall of the booster impeller, the top opening communicates with the side wall opening, a bearing seat is arranged at the bottom of the main shaft, and a sealing device is arranged between the main shaft and the end part of the bearing seat. According to the system, through the arrangement of the structure of the booster impeller, the centrifugal force can be utilized to maintainthe pressure in the tank body, so that an additional pressurized feed tank is not arranged, the equipment structure is greatly simplified, the installation space of the equipment is reduced, and the equipment volume is reduced.

The invention discloses a corrugated expansion joint, which comprises flanges and a corrugated pipe; each flange is connected with the corrugated pipe through a connecting pipe; each connecting pipe is hermetically connected with the end face of the corresponding flange. The further improvement is that a groove is formed in the end face of each flange; each connecting pipe is embedded into the corresponding groove; a rabbet is formed in the connecting end hole of each connecting pipe and the corrugated pipe; the corrugated pipe is hermetically connected with the interiors of the rabbets; silica gel fills an axial gap between the end part of each connecting pipe and the corrugated pipe. According to the corrugated expansion joint disclosed by the invention, the welding reliability is obviously improved, the sealing effect is effectively ensured, and the service life is obviously prolonged.

The invention discloses a hexagonal nut with seal rings. A nut end face outside a screw hole is provided with an inner circular groove and an outer circular groove, the inner circular groove and the outer circular groove are axially identical, an inner seal ring and an outer seal ring are arranged in the inner circular groove and the outer circular groove respectively, and heights of the inner seal ring and the outer seal ring are equal and larger than depths of the bottoms of the inner circular groove and the outer circular groove. A nut body is made from a magnet attracting iron material, the inner seal ring and the outer seal ring are rubber soft magnets, and magnetic surfaces of the inner seal ring and the outer seal ring are positioned upwards to enable the inner seal ring and the outer seal ring to be attracted in the inner circular groove and the outer circular groove respectively under the magnetic action. The hexagonal nut with the seal rings has the advantages that excellent sealing effects are achieved since deflection and deformation of the seal rings are prevented, and the seal rings are protected from being lost resulted from shedding from a screw rod.

The invention belongs to the technical field of mechanical arms and driving structure design thereof, and particularly relates to a chain type driving telescopic arm. The chain type driving telescopic arm comprises a fixed arm, a telescopic arm, a tail end arm and a servo driving assembly; the fixed arm comprises a fixed arm body and a fixed arm supporting sleeve piece; the telescopic arm comprises a telescopic arm body, a telescopic arm guide assembly and a telescopic arm supporting sleeve piece; the tail end arm comprises a tail end arm body and a tail end arm guide assembly; and the servo driving assembly comprises a servo motor set and a driving gear. The chain type driving telescopic arm is simple and compact in overall structure, the cost is effectively reduced, meanwhile, the number and the length of needed gears and chains are reduced, and the probability of occurrence of the problems of jamming, dislocation, sliding and the like is effectively reduced; and according to the chain type driving telescopic arm, the independence and the sealing performance of a telescopic arm driving system are guaranteed, so that the telescopic arm can be used in various production operation occasions with high sealing requirements and high anti-pollution requirements on mechanical arms, such as shot blasting and paint spraying.

The invention discloses a multifunction gas storage plate pneumatic stirring and biogas collecting method. According to the method, in the pneumatic stirring process, a plurality of baffles are arranged in a gas storage plate and divide the gas storage plate into a plurality of fermentation regions, and since the distribution of fermentation raw materials, strains and the like in a biogas fermentation system is not uniform, adjacent fermentation regions are different in fermentation efficiency and are not consistent in air pressure and the air pressure difference is used as power; in the biogas collecting process, the top of the gas storage plate of the biogas fermentation system is communicated with a gas inlet of a plus gas collecting system, biogas enters the inner cavity of the system, air pressures at the upper end and the lower end of a gas guide piston connected into a gas cylinder in a sliding way are identical by virtue of a gas channel and the gas guide piston is driven to move when the same air pressure acts on different acting faces.

The invention discloses an S-type fermentation pool, comprising a fermentation pool body, a gas storage plate and partition plates, wherein the partition plates are arranged in the fermentation pool body and are used for partitioning the fermentation pool body into an S-type fermentation chamber; the gas storage plate, which is matched with the fermentation chamber in shape, is fixed in the fermentation pool body; gaps between two ends of the gas storage plate and the fermentation pool body are taken as a feeding port and a discharging port; a gap between the side wall of the gas storage plate and the fermentation pool body as well as gaps between the gas storage plate and the partition plates are taken as a stirring tank; the stirring tank is internally and movably provided with stirring devices. According to the S-type fermentation pool, the fermentation line is long; fermentation raw materials are sufficiently fermented in the fermentation chamber; the uniform distribution of the fermentation raw materials can be enhanced and the fermentation chamber can be dredged by utilization of the stirring action of the stirring devices in the stirring tank, so that the blockage problem is solved.

The invention discloses a main drive sealing system and method of a shield machine self-adapting to soil bin pressure changes. The system comprises a fluid channel box, a friction ring, a sealing medium and a plurality of sealing rings. The fluid channel box sleeves the friction ring and an annular gap is formed between the friction ring and the fluid channel box, the plurality of sealing rings divide the gap into a plurality of annular pressure cavities, an injection channel is formed in the fluid channel box, and the sealing medium is filled in the injection channel and the pressure cavities. In order to control water and soil pressure and various working pressure, the sealing method meets the following conditions that P<2>=P<1>+[delta]P<1>, and P<N>=P<N-1>-[delta]P<N>, [delta]P<1>>0, and [delta]P<N>>0. According to the system, the working pressure of the main drive sealing system can be linked with the soil bin pressure changes, so that the pressure bearing capacity of the main drive sealing system can be matched with the soil bin pressure changes; the shield machine working under ultra-high water and soil pressure has a higher demand for the sealing effect of the main drive sealing system, and higher working reliability is required.

The invention discloses an electronic actuator. The electronic actuator comprises a lower shell and an upper shell, wherein an opening is formed in the top of the lower shell; the shape and the size of the upper shell are matched with the top of the opening of the lower shell, so that seal is formed when the upper shell and the lower shell are combined; the upper shell and the lower shell are combined to form a containing cavity located in the upper shell and the lower shell; a gear transmission mechanism is arranged in the containing cavity; a to-be-sealed cavity communicating the inside andoutside of the upper shell is arranged on the upper shell; and a sealing structure is arranged in the to-be-sealed cavity. The electronic actuator is compact in structure, and convenient in assemblingand debugging; later maintenance cost is greatly reduced, and durability is relatively higher; and high sealing requirements of the electronic actuator in a severe working environment for a long timeare met. In addition, the device is light in weight; installation stability of motors is improved; meanwhile, integrated multi-elastic-piece design is adopted, and problems that a traditional split type damping elastic piece is poor in matching performance and prone to loosening and the like are avoided; and damping effect is greatly improved.

The invention relates to the technical field of valve body manufacturing, in particular to a foreign matter discharging spherical valve. The foreign matter discharging spherical valve is composed of avalve body, a water inlet connecting pipe and a water outlet connecting pipe. The two ends of the valve body communicate with the water inlet connecting pipe and the water outlet connecting pipe correspondingly. The foreign matter discharging spherical valve is characterized in that the valve body is spherical, the spherical valve body is internally provided with a spherical inner cavity internally provided with a spherical valve core, and the middle of the spherical valve core is provided with an X-shaped fluid channel; the section of the fluid channel presents that openings are gradually enlarged from the middle towards the two ends and are symmetrical; a foreign matter and air discharging opening is formed in the position, on one side of the water outlet connecting pipe, of the valve body, and a foreign matter and air discharging pipe is arranged at the foreign matter and air discharging opening; the diameter of each end opening of the fluid channel is larger than the maximum distance between the water outlet connecting pipe and the foreign matter and air discharging pipe; and the outer side face of the spherical valve core is connected with an external rotating handle througha rotating rod. By rotating the handle, three states, namely, closing, opening and foreign matter discharging, of the X-shaped fluid channel of the spherical valve core are achieved, and the foreign matter discharging spherical valve has the advantages that the structure is simple, high-point air discharging and low-point sewage discharging are both achieved, sampling is convenient, and pressure and temperature measuring is simple.

The invention discloses a self-circulation stirring device which comprises a stirring sleeve, wherein the stirring sleeve is fixed above a gas storage plate of a biogas fermentation system and is communicated with two fermentation areas which are arranged in the gas storage plate at an interval, a pneumatic piston which separates the two fermentation areas is slidably connected in the stirring sleeve in a sleeving mode, two ends of the pneumatic piston are connected with an outer sleeve through piston rods respectively, springs are connected onto outside walls at two ends of the stirring sleeve in a sleeving mode, step cavities matched with the outside wall of the stirring sleeve are arranged on the outer sleeve, communication holes which communicate the step cavities are formed in the outer sleeve, and the outer sleeve is fixedly connected with a stirring net.

The invention relates to a method for processing a mold with a special-shaped planer in the field of mold processing. The method for processing the mold with the special-shaped planer comprises the following steps of: the first step: making a planing knife; the second step: performing numerical control machining programming; the third step: planing a first piece; the fourth step: measuring the first piece; the fifth step: planing copies; the sixth step: measuring the copies; and the seventh step: assembling the mold. The self-made shaped planing knife can be used for planing processing, therefore, the variety of tools is small, the overall manufacturing cost is reduced by about 20% to 30%, and the comprehensive processing time is shortened by about 30% to 50%; the planing processing methodis used for replacing the traditional milling processing method, and the surface quality of the processed cavity is stable, which is more suitable for processing special-shaped cavity; and the planing processing method can also process a cavity that is concave along the horizontal direction, so as to ensure the integrity of the mold. The sealing ring produced by the mold manufactured by the method for processing the mold with the special-shaped planer is more suitable for precision instruments with higher sealing performance and strength requirements.

The invention discloses a compression-resistant steering protective cover. The protective cover comprises a first mounting end, a second mounting end and an elastic corrugated cover arranged between the first mounting end and the second mounting end, a plurality of reinforcing ribs are evenly distributed on the inclined face of the connecting position of the elastic corrugated cover and the first mounting end in the circumferential direction, the elastic corrugated cover is provided with a plurality of wave crest sections protruding outwards in the axial direction, the elastic corrugated cover is provided with a plurality of wave trough sections recessed inwards in the axial direction, and a plurality of fixing ribs are fixedly installed on the wave trough sections. According to the protective cover, the four reinforcing ribs are arranged on the inclined face of the end of the elastic corrugated cover, the strength of the inclined face of the elastic corrugated cover is enhanced, deformation generated by high temperature and high pressure is resisted, and meanwhile the situation that when the elastic corrugated cover stretches out and draws back, the inclined face collapses to cause abnormal sound, and use of the protective cover is affected is prevented; and the plurality of fixing ribs are arranged between two adjacent wave trough sections in a staggered mode, so that the strength of the elastic corrugated cover is improved, and the high-temperature deformation resistance of the protective cover is improved.

The invention relates to a novel packaging adhesive tape and a packaging box comprising the same. The adhesive tape comprises a viscous tape, and at least one end of the viscous tape is connected witha lifting portion used for assisting separation of the viscous tape from a to-be-packaged object. The viscous tape and the to-be-packaged object can be rapidly and accurately separated, so that the viscous tape is more easily torn away, and the problem that due to inconvenient tearing, an object is taken out by gashing a packaging gap of a viscous tape, and then the to-be-packaged object is thrown away and has no secondary recycling value is avoided.