59results about How to "Wide adjustment range" patented technology

The invention discloses a pneumatic loading type frictional wear tester which comprises a sample stage, a loading mechanism, a drive mechanism, a data acquisition unit and a stander; the sample stage is arranged on the stander and can do rotary motion or alternate motion under the driving of the drive mechanism; the loading mechanism comprises a head support, a friction head, a cylinder; the friction head is arranged on the head support. The head support is connected with the cylinder and can cause that the friction head on the head support closely pressures or breaks away the surface of the sample arranged on the sample stage. The data acquisition unit gathers the pressure applied on the sample by the friction head and the frictional data. The cylinder adjusts the pressure applied on the sample by the friction head according to the information fedback by the data acquisition; in the pneumatic loading type frictional wear tester, the sensor gathers the pressure information, and a computer controls an electric reducing valve to regulate the throughput of the cylinder; the regulation range of the pressure is wider; the pneumatic loading type frictional wear tester can effectively evaluate the frictional wear performance of a running pair with different materials and technique.

The invention discloses a preparation method of a carbon nanotube-alumina composite reinforced magnesium-based composite material, which relates to the manufacture of magnesium-based alloy by using a casting method. The preparation method comprises the steps of: step 1, calcining and reducing raw materials of ferric nitrate nonahydrate and alumina in the ratio of (0.07-1.00):1 to obtain an iron / alumina composite catalyst, and finally, performing catalytic pyrolysis reaction by using the mixed gas of nitrogen gas and ethylene in the volume ratio of (6-12):1 for uniformly dispersing carbon nanotubes on the surface of the alumina, so as to prepare a carbon nanotube-alumina composite reinforced phase; and step 2, adding the carbon nanotube-alumina composite reinforced phase to a molten magnesium base material, and stirring and casting to prepare the carbon nanotube-alumina composite reinforced magnesium-based composite material, wherein the added carbon nanotube-alumina composite reinforced phase accounts for 1-15% of the molten magnesium base material by mass percentage. According to the invention, the defect of a magnesium-based alloy texture in the magnesium-based composite material produced in the prior art is overcome, the excellent enhancing effect of the carbon nanotubes in a magnesium matrix can be brought into full play, and the comprehensive performance of the magnesium-based composite material is ensured to be enhanced.

The present invention provides a gamma setting system for a display device including: an optical measuring unit measuring an optical property of a display device including an emissive display panel having red, green and blue sub-pixels; a control center performing a null setting step and an automatic setting step using the optical property of the display device; a system driving unit transmitting a result data between the display device and the control center; a first display unit displaying a TW target luminance, a TW target chromaticity and an RGB inherent chromaticity registered for the null setting step and the automatic setting step, a graph of a gray level voltage and a luminance of an RGB and a TW with respect to a gray level, a high level cell driving voltage (PVDD) and a low level cell driving voltage (PVEE) applied to an emitting element, a high level gamma source voltage (VDDH) and a low level gamma source voltage (VDDL) applied to a driving IC, a gamma slope, a contrast ratio, a driving type of the system, a gamma setting, an instruction on an execution command, and a progress state of the display device.

The invention relates to the field of buoyancy control, and in particular, relates to a device for expanding volume, reducing density and increasing buoyancy, wherein the device includes a left metalhemisphere, a right metal hemisphere and a corrugated film connecting the left metal hemisphere and the right metal hemisphere. The left metal hemisphere and the right metal hemisphere are arranged ina relative buckling direction, and the left metal hemisphere and the right metal hemisphere are sealedly connected together by the corrugated film; a middle position, between the left metal hemisphere and the right metal hemisphere, of the corrugated film is fixedly provided with a motor support; the motor support is equipped with a drive motor with a speed reducer, and an output shaft of the speed reducer is externally connected with a double-worm gear mechanism; the inner side walls of the top points of the left metal hemisphere and the right metal hemisphere in the corrugated film stretching direction are fixedly provided with a left screw rod and a right screw rod respectively. The device for expanding volume, reducing density and increasing buoyancy can adjust the volume of a buoyancy device flexibly and rapidly, and also can be self locked, so the whole mechanism cannot consume too much electric energy, and meanwhile, the buoyancy can be easily adjusted by controlling positive and negative rotation and a rotation position of the driving motor.

The invention discloses a wind power generator set and a yawing-braking magnetic thixotropic flexible braking device of the wind power generator set. The braking device comprises an outer ring, an inner ring, a magnetic yoke, a coil winding, a braking wheel and a magnetic thixotropic adhesive, wherein the outer ring and the inner ring are connected with each other through the magnetic yoke and can be fixed on a tower flange of the wind power generator set; the braking wheel comprises a fixed part and a braking part and can be fixed on a cabin seat; the outer ring and the inner ring are connected to form a braking slot for accommodating the braking part of the braking wheel and a coil winding slot for accommodating the coil winding; the braking part of the braking wheel is arranged in the braking slot in a rotatable manner, and a clearance is formed between the braking part and each of the inner ring and the outer ring; and the magnetic thixotropic adhesive is accommodated in the clearances. According to the braking device, abrasion and spot corrosion of wheel teeth of a yawing driving system are effectively reduced, the braking noise and the vibration during yawing braking are reduced, the service life of a gear box is effectively prolonged, and the running cost of a fan is reduced.

In a support for holding and positioning a utility load in space having a base (10) and an elongated supporting arm (12) which between its longitudinal ends is swingably supported on the base (10) for swinging moment about a vertical first axis (24) and about a horizontal second axis (30) which intersects the vertical first axis (24), the supporting arm (12) carrying on one side of the second axis the utility load and on the other side of the second axis carrying a counterweight compensating for the utility load, the utility load being arranged on a first connector arm (14) which is pivotally supported at one end of the supporting arm (12) for moment about a third axis (36), the counterweight (18) being arranged on a second connector arm which is swingably supported on the other end of the supporting arm (12) for movement about a fourth axis (38), the third and fourth axis being parallel to one another, the spacing (Ln) between the engagement point (N) of the utility load and the first connector arm (14) and the third axis (38) being equal to the spacing between the third axis (38) and the vertical axis (24), the spacing (Lg) measured in the longitudinal direction of the second connector arm (16) between the center of gravity (G) of the counterweight (18) and the fourth axis (38) being equal to the spacing between a fourth axis (38) and the vertical first axis (24), and the two connector arms (14, 16) being so coupled with one another by a coupling means that in any pivoted position they are directed antiparallel to one another.

The present invention relates to the technical field of door closers, and particularly discloses an electromagnetic release door closer. The electromagnetic release door closer comprises a door closer body, a slide rail, and a rocker arm, one end of the rocker arm is articulated with the door closer body, wherein the slide rail is provided with a slide groove and a slide cavity which are parallel to each other, a through slot which is parallel to the slide groove is arranged between the slide groove and the slide cavity, wherein an electromagnetic limiting mechanism can be fixed at any position in the slide cavity. In the electrified state of an electromagnet, an electromagnetic attracting plate and the electromagnet are in a fixed state under the action of magnetic force, a limiting latch bolt is located in the slide groove, and is used to limit the sliding of a slider in the slide groove, and under this state, the slider can slide freely between the limiting latch bolt and one end of the slide groove, that is, a door leaf can move freely between a position limited by the limiting latch bolt and a maximum opening position. The defect that a door leaf can only be fixed in one specific state in the prior art is overcome, the range of adjustment is wider, and the electromagnetic release door closer is more convenient to use, and can meet more use requirements.

A voltage-controlled oscillator comprises a variable inductor, a negative impedance circuit, an operating voltage source and a ground point. The variable inductor comprises a transformer and a transistor switch, the transformer comprising a primary side coil and a secondary side coil, the primary side coil comprising a first coil and a second coil, and the secondary side coil comprising a third coil and a fourth coil. The transistor switch is connected in parallel with the primary side coil to adjust an inductance value of the variable inductor based on a gate voltage. The negative impedance circuit is connected in parallel with the secondary side coil to compensate the power consumption of the voltage-controlled oscillator during oscillation. The operating voltage source is electrically connected between the third coil and the fourth coil, and the ground point is electrically connected between the first coil and the second coil.

The invention discloses a fork laterally-moving distance-adjusting device of a fork truck and a special-purpose fork frame assembly. The fork laterally-moving distance-adjusting device of the fork truck comprises a front oil supply pipeline and a function switching pipeline. By applying the two pipelines in a combined way, a plurality of motion processes can be generated. By matching with the fork frame assembly comprising a roller mechanism for application, the fork laterally-moving distance-adjusting device can achieve the fork laterally-moving function and the fork distance-adjusting function. Furthermore, the device can achieve lateral movement of a single fork and then achieve distance adjustment through the lateral movement of the single fork. The device further achieves the positioning function of a fork in a fork frame.

Disclosed is a synthesis method of nonylphenol ethoxylate polyoxypropylene ether, belonging to the compound synthesis technology field, which uses nonylphenol, propylene oxide and ethylene oxide as materials, performing polymerization by first adding propylene oxide or ethylene oxide in the presence of a catalyst, and performing polymerization by secondly adding ethylene oxide or propylene oxide to prepare nonylphenol ethoxylate polyoxypropylene ether; wherein, the catalyst is a mixture of one or more of solid sodium methoxide, sodium methoxide methanol sollution, KOH, NaOH, etc., the amount of the added catalyst is 0.1-1.0% by weight of prepared nonylphenol ethoxylate polyoxypropylene ether. The invention uses two steps of polymerization, the reaction condition is gentle and is easy to control, the request on the device is low, the prepared products has wide preparation range for emulsifier or demulsifier and is easy to control.

The invention discloses a preparation method of cardanol triblock polyether, including: 1) washing a reaction kettle until clean with distilled water and drying the reaction kettle; 2) sucking 400-500parts of cardanol and 1-5 parts of an alkali catalyst into the reaction kettle; 3) pressing metered ethylene oxide, in liquid status, into the reaction kettle with nitrogen gas through an ethylene oxide feeder; 4) after the ethylene oxide is fed completely, pressing 200-680 parts of metered propylene epoxide, in liquid status, into the reaction kettle with nitrogen gas through a propylene epoxidefeeder, and performing a polymerization reaction; 5) after the reaction is completed, pressing 370-885 parts of metered ethylene oxide, in liquid status, into the reaction kettle with nitrogen gas through the ethylene oxide feeder, and performing a polymerization reaction; 6) degassing the product, reducing the temperature to about 70 DEG C, pressing the product into a homogenizing kettle, adding1.3-5.3 parts of glacial acetic acid for neutralization, and if qualified, delivering and packaging the product. The cardanol triblock polyether is biodegradable and environment-friendly, belongs tononionic surfactants, and has excellent cleaning capability and low-foaming property.

A stage by stage delay current-summing slew rate controller includes a delay controller, a delay cell array, a current source array, a switch array, a load. The delay cell array includes N delay cells, the switch array includes N switches, and the switch includes N current sources, wherein N>1. The delay controller is connected with the control ports of the delay cells respectively, and the delay cells are connected with the control terminal of the switches respectively. One of the connecting terminals of the switch is connected with the output end of the current source, and the other end of the connecting terminals of the switch is connected with one end of the load, and the other end of the load is connected to the ground.

This invention provides a quick detaching device for handgun tactical light which includes a tactical light base, two locking members correspondingly disposed on two sides of a top end of the tactical light base, sliding members and a pressing mechanism; a sliding slot is correspondingly mounted in a middle part of each of the sliding members; the sliding members are respectively mounted in the sliding slots; a through slot which passes through the tactical light base is provided in the tactical light base; a stopping plate is provided in a middle part of the through slot; the pressing mechanism is mounted in the through slot and corresponds to the stopping plate. This invention can quickly mount and detach the tactical light without the help of tools and great effort, and is convenient to use.

The invention discloses a preparation method of a carbon nanotube-alumina composite reinforced magnesium-based composite material, which relates to the manufacture of magnesium-based alloy by using a casting method. The preparation method comprises the steps of: step 1, calcining and reducing raw materials of ferric nitrate nonahydrate and alumina in the ratio of (0.07-1.00):1 to obtain an iron / alumina composite catalyst, and finally, performing catalytic pyrolysis reaction by using the mixed gas of nitrogen gas and ethylene in the volume ratio of (6-12):1 for uniformly dispersing carbon nanotubes on the surface of the alumina, so as to prepare a carbon nanotube-alumina composite reinforced phase; and step 2, adding the carbon nanotube-alumina composite reinforced phase to a molten magnesium base material, and stirring and casting to prepare the carbon nanotube-alumina composite reinforced magnesium-based composite material, wherein the added carbon nanotube-alumina composite reinforced phase accounts for 1-15% of the molten magnesium base material by mass percentage. According to the invention, the defect of a magnesium-based alloy texture in the magnesium-based composite material produced in the prior art is overcome, the excellent enhancing effect of the carbon nanotubes in a magnesium matrix can be brought into full play, and the comprehensive performance of the magnesium-based composite material is ensured to be enhanced.

The invention discloses a high-precision spindle of a braiding machine. The spindle integrates a thread-unreeling clutch unit, a strand brake unit and a tension adjusting unit into one; a unidirectional bearing is additionally installed on bobbin column in particular; when a thread-carrying spool is counter rotated, a loose strand can be easily and rapidly reeled; ball type transmission is applied in clutch and brake units for the first time, and such a structure has the characteristics of high cooperation precision, small workpiece wear, fast operation speed, uniform thread unreeling amount and low work noise and is especially applicable to high-speed braiding; the tension adjusting unit realizes stepless adjustment of tension by changing pretightening force of a tension spring through rotation of a tension adjusting nut, which enables a tension adjusting range to be wider and more accurate, so product quality and work efficiency can be greatly improved; thus, the high-precision spindle of the braiding machine has a wider application scope.

The invention discloses a technology and a system for preparing synthetic oil by biomass indirect liquefaction. The technology comprises the following steps of biomass pressure gasification, syntheticair purification, oil product synthesis, tail gas decarburization, tail gas oil washing, tail gas reforming, tail gas hydrogen production, oil product processing and tail gas desulfurization; in thebiomass pressure gasification step, the pressure of a gasifier is 3-5MPa (G), the temperature of a drying section in the gasifier is less than 500 DEG C, the temperature of a distillation section is 500-1000 DEG C, the temperature of a gasification section is 1000-1100 DEG C, the temperature of a burning section is 1100-2000 DEG C, and the temperature of a molten slag section is 1700-2000 DEG C; tar generated in the steps of biomass pressure gasification and synthetic air purification is taken as the raw material of an oil product processing step, and the tar is blended with intermediate synthetic oil obtained in the oil product synthesis step to obtain a synthetic oil product. According to the technology and the system thereof, each technology unit and a relevant matching technology are integrally considered, technology optimization is carried out from an integral angle, configuration is reasonable, and the efficient utilization of biomass new energy is realized.

The invention discloses a wind power generator set and a yawing-braking magnetic thixotropic flexible braking device of the wind power generator set. The braking device comprises an outer ring, an inner ring, a magnetic yoke, a coil winding, a braking wheel and a magnetic thixotropic adhesive, wherein the outer ring and the inner ring are connected with each other through the magnetic yoke and can be fixed on a tower flange of the wind power generator set; the braking wheel comprises a fixed part and a braking part and can be fixed on a cabin seat; the outer ring and the inner ring are connected to form a braking slot for accommodating the braking part of the braking wheel and a coil winding slot for accommodating the coil winding; the braking part of the braking wheel is arranged in the braking slot in a rotatable manner, and a clearance is formed between the braking part and each of the inner ring and the outer ring; and the magnetic thixotropic adhesive is accommodated in the clearances. According to the braking device, abrasion and spot corrosion of wheel teeth of a yawing driving system are effectively reduced, the braking noise and the vibration during yawing braking are reduced, the service life of a gear box is effectively prolonged, and the running cost of a fan is reduced.

The invention discloses an intelligent testing device of an RCD (Residual Current Operated Protective Device). The intelligent testing device comprises a test loop and an experimental loop, wherein the test loop is used for setting and testing the magnitude of experimental current of the RCD; the experimental loop is used for testing the RCD by utilizing the experimental current. The invention also discloses a testing method based on the intelligent testing device. According to the intelligent testing device and the testing method, disclosed by the invention, the test loop and the experimentalloop can be switched through switching on and off of alternating current contactors, test wiring is simplified, the working efficiency of a test is increased, the test wiring is simple and direct, the problem of a narrower test current regulating range is solved, a misoperation rate and the technical difficulty are reduced, the experiment efficiency and the safety performance are effectively increased, and the accuracy of experimental data is effectively increased.

The invention relates to a high-strength separating membrane with a reinforcing material and a preparation method of the high-strength separating membrane and belongs to the technical field of separating membrane preparation. The preparation method includes the steps that a polymer, an additive and a solvent are mixed to be uniform according to preset mass percentages to obtain a membrane preparing solution, isocyanate and a gas absorber are mixed to be uniform to obtain the reinforcing material, the membrane preparing solution and the reinforcing material are extruded through a co-extrusion method, and then the reinforcing material is covered with the membrane preparing solution. The high-strength separating membrane and the preparation method have the advantages that the separating membrane is prepared through the co-extrusion method, and a supporting layer material and the membrane preparing solution in the separation layer can be independently prepared and do not affect each other; the adjusting range of the composition of the membrane preparing solution is wide, the reinforcing additive can be added to the membrane preparing solution in the supporting layer on the inner layer, the separation performance of the separating membrane is not affected, and meanwhile the high-strength and high-flux separating membrane is obtained.

The invention relates to a polished rod sealing device special for a pumping unit and mainly solves the existing problems that force is not easy to command, great effort is needed and the adjustable range of a deviation-adjusting device is narrow when carbon fiber packing of a well mouth of a pumping unit is tightened. The polished rod sealing device special for the pumping unit is characterized in that a well sealing rubber gasket (14) is arranged on the inside of the upper part of a lower connector (18), a well sealing pressing cap (12) is arranged at the upper end of the well sealing rubber gasket (14), a well sealing gland (13) is connected to the outside of the upper part of the lower connector (18), and a deviation-adjusting base (10) is arranged on the inside of the upper part of the well sealing gland (13) and is in contact with an above sealing cylinder (7) through a spherical surface; a spiral sealing part (6) is arranged inside the sealing cylinder (7), a pressing block (5), a spring (3) and a thrust bearing (2) are arranged at the upper part of the spiral sealing part (6) sequentially, and the upper part of the thrust bearing (2) is fixed by a pressing cap (1). According to the polished rod sealing device special for the pumping unit, the effort is saved, the force is controllable, the adjustable range of the deviation-adjusting device is wide, and the deviation-adjusting effect is good when the carbon fiber packing is tightened.

The present invention relates to an adaptable RF impedance translation circuit that includes a first group of inductive elements cascaded in series between an input and an output without any series switching elements, a second group of inductive elements cascaded in series, and a group of switching elements that are capable of electrically coupling the first group of inductive elements to the second group of inductive elements. Further, the adaptable RF impedance translation circuit includes at least one variable shunt capacitance circuit electrically coupled between a common reference and at least one connection node in the adaptable RF impedance translation circuit, which includes control circuitry to select either an OFF state or an ON state associated with each of the switching elements and to select a capacitance associated with each variable shunt capacitance circuit to control impedance translation characteristics of the adaptable RE impedance translation circuit.

The invention discloses a fork laterally-moving distance-adjusting device of a fork truck. The device at least comprises an oil cylinder I, an oil cylinder II, and a hydraulic pipeline. The oil cylinder I and the oil cylinder II are both connected with the hydraulic pipeline. The hydraulic pipeline at least comprises a front oil supply pipeline, a function switching pipeline and a multi-way valve for connecting with oil supply pipelines of the fork truck. The function switching pipeline can form two independently-working oil ways on the front oil supply pipeline in a combined way. The two oil ways which are independent to each other do not interfere with each other. By using the fork laterally-moving distance-adjusting device of the fork truck, a fork assembly can achieve a laterally-moving function and a distance-adjusting function by means of only two oil cylinders and a set of oil supply pipelines. Moreover, the fork assembly can achieve a single-fork laterally-moving function and further achieve distance adjustment through the lateral movement of a signal fork. The positioning function of a fork on a fork frame is also realized.

The invention relates to a slightly wettened double-tightened double-sealed double-adjusted well head device. The device mainly solves the problems that packings of existing well head devices are likely to leak, acquirement and addition of the packings are not convenient and the deviation adjustment range is small. The device is characterized in that a packing box pressing cap (7) is in threaded connection with the upper portion of a packing box (8), a pulling rod (5) is fixed to the packing box pressing cap (7), a groove is formed in the upper portion of the packing box pressing cap (7) and internally provided with a cotton felt pad (4), an oil cavity pressing cap (3) is in threaded connection with the outer side of the top of the packing box pressing cap (7), and an upper oil injection hole (2) is formed in the oil cavity pressing cap (3). The slightly wettened double-tightened double-sealed double-adjusted well head device has great sealing performance, more convenience is providedfor taking and adding the packings, the deviation adjustment range is wide, the lubricity is excellent, and wearing between the packings and smooth rods is reduced.

The invention relates to a mechanical diaphragm metering pump facilitating outlet pressure increase. The mechanical diaphragm metering pump comprises a pump head, a pump head seat, a transmission box,a driving motor, a diaphragm, a piston rod, a middle section, an inlet one-way valve and an outlet one-way valve, the edge of the diaphragm is clamped between the pump head and the middle section, the middle of the diaphragm is fixed between a closure nut and a supporting nut, the supporting nut is connected with the piston rod, the closure nut is positioned on one side, contacting with a conveying medium, of the diaphragm, the supporting nut is positioned on one side, not contacting with the conveying medium, of the diaphragm, and a movable supporting semi-ring component for supporting the diaphragm is arranged on the supporting nut. Compared with the prior art, the mechanical diaphragm metering pump is convenient to maintain and simple to use, a specially designed movable supporting semi-ring is mounted in the mechanical diaphragm metering pump, so that the static pressure of the mechanical diaphragm metering pump is multiply increased, maximum working pressure is improved by eighttimes, so that the mechanical diaphragm metering pump meets a novel process in the fields of water treatment and chemical addition.

The invention discloses a method for preparing modified propylene oxide ester, which comprises the following steps: (1) reacting polyester polyol with acid anhydride at 60-90 DEG C for 1-2 hours underthe action of 4-dimethylaminopyridine to synthesize carboxyl-terminated polyester polyol, namely an intermediate 1; (2) reacting the intermediate 1 with epoxy resin for 1-2 hours at 80-100 DEG C under the action of a catalyst 1 to prepare polyester polyol toughened and modified epoxy resin, namely an intermediate 2; wherein the catalyst 1 is one of triethylamine, N,N-dimethylaniline and pyridine;(3) reacting the intermediate 2 with acrylic acid for 5-7 hours at 100-120 DEG C under the action of a polymerization inhibitor and a catalyst 2 to prepare modified epoxy acrylate; and wherein the catalyst 2 is one or a combination of tetraethylammonium bromide, benzyl trimethyl ammonium chloride and triphenylphosphine. After the modified epoxy propylene ester prepared by the method is cured, theflexibility of a film is good.

The invention discloses application of hydrocyclone separation technology in an MCP (maximizing catalytic propylene) device. The invention involves a fractionating tower, a stable reboiler, a slurry oil crude oil heat exchanger, and a hydrocyclone separator. The steps include that: slurry oil in the fractionating tower passes through a slurry oil pump to reach high temperature and high pressure, then the slurry oil flows through the stable bottom reboiler and the slurry oil crude oil heat exchanger in order, after cooling to a certain temperature, a part of slurry oil flows back to the fractionating tower through a pipeline, and the other part of slurry oil flows into a liquid inlet of the hydrocyclone separator at certain flow, and then flows into a hydrocyclone head through a clear stream pipe outer wall, and the clear stream pipe outer wall is equipped with a spiral structure, the lower end of the hydrocyclone head is funnel-shaped, after entering the lower end of the hydrocyclone head, the slurry oil undergoes high speed rotating motion, then clear and heavy slurry oil can be separated, the clear stream returns to the upper part of the hydrocyclone separator through the clear stream pipe and flows out, and returns to the fractionating tower, and the heavy stream flows out from the bottom of the hydrocyclone separator and is then thrown out of the device. The invention has the advantages of small slurry oil viscosity, low specific gravity, high solid-liquid separation efficiency, low manufacturing cost and small space occupation.

The invention discloses an automatic cement mixer. The automatic cement mixer comprises a shell, a mixing shaft, scratch-resisting plates and supporting rods. The outer side of the bottom of the shell is fixedly connected with a discharge outlet. The portion, close to the right side, of the top of the shell is fixedly connected with a feed inlet. One end of the mixing shaft is movably connected with one end of a motor; and the other end of the mixing shaft is movably connected with a distributor. The distributor is fixedly connected with the inner side of the bottom of the shell through the supporting rods. The motor is fixedly connected with the top of the shell through a bracket. The scratch-resisting plates are arranged on the two sides inside the shell and close to the bracket. The mixing shaft is fixedly connected with three mixing discs. The two sides of each mixing disc are fixedly connected with mixing blades correspondingly. The automatic cement mixer is simple in structure, small in size and good in stability; a viscosity setting device can be used for effectively setting the viscosity of materials; a digital control device enables the automatic cement mixer to conduct automatic mixing; the use adjustment range is wide, and the precision is high; and the S-shaped mixing blades are reasonable in structural design, mixing is quickened, the working efficiency of equipment is improved, and the automatic cement mixer is easy to promote.

The invention provides a modularized single-double throat switching type steam generation device which solves the problems that an existing steam generation mode is complex in system and high in cost, the steam pressure cannot meet the requirement, or ignition reliability is low, and explosion is caused under the extreme condition. The device comprises a head, a combustion chamber, a first throat and an outlet chamber which are sequentially connected. The head comprises a head shell, a supporting pipe, an alcohol nozzle center body and a swirler, the head shell comprises a sleeve and an end cover, and an air inlet is formed in the sleeve; the front end of the supporting pipe is arranged on the end cover and provided with an alcohol inlet, and the rear end of the supporting pipe extends into the combustion chamber and is an inner conical opening. The alcohol nozzle center body penetrates through the supporting pipe, the front end of the alcohol nozzle center body extends out of the supporting pipe and can axially move along the supporting pipe, and the rear end of the alcohol nozzle center body is provided with a conical boss matched with the inner conical opening; the swirler is sleeved at the rear end of the supporting pipe; a plurality of air holes are formed in the combustion chamber; and a first cooling medium cavity and a first medium inlet in the first throat are used for cooling fuel gas generated by the combustion chamber.

The invention relates to an underground gas-driven drainage pump and a gas-driven drainage method, and belongs to the technical field of oil and gas exploitation underground tools. A flow dividing block is arranged in a pump cylinder; a drainage pump shell is arranged at one end of the pump cylinder in a threaded mode, and a lower joint is arranged at the other end of the pump cylinder in a threaded mode; a stepped center hole is formed in the drainage pump shell, an inner joint is arranged in an upper port of the center hole in a threaded mode, and a valve element is arranged in the center hole below the inner joint; and a gas injection flow channel is axially formed in the position, on one side of the inner joint and the valve element, of the drainage pump shell, and a lifting flow channel is axially formed in the position, on the other side of the inner joint and the valve element, of the drainage pump shell. The drainage pump achieves lifting by directly transmitting ground pressure energy to liquid in a closed space, and has the characteristics of being high in lifting efficiency and low in energy consumption. Compared with the prior art, the underground gas-driven drainage pump has the advantages that the working reliability is high, the problem of gas locking in the working process is avoided, meanwhile, back pressure is not generated to the stratum, and the undergroundgas-driven drainage pump is particularly suitable for oil extraction of low-energy and low-yield wells.