47results about How to "Low production and maintenance costs" patented technology

The invention discloses an apparatus for measuring a diffusion coefficient during a shale oil carbon dioxide huffing-puffing process and a method thereof. According to the invention, a radial rock core holding unit, a confining pressure pump and a first pressure transducer are connected with a first three-way connector, a simulation oil saturation pump, a third pressure transducer and the radial rock core holding unit are connected with a fourth three-way connector, the radial rock core holding unit and a vacuum pump are communicated with outside through a third three-way connector, the radialrock core holding unit and a CO2 high-pressure container are connected, the CO2 high-pressure container, a second pressure transducer, and a CO2 gas tank are connected with a second three-way connector, and the confining pressure pump, the CO2 high-pressure container, the radial rock core holding unit, the simulation oil saturation pump, the first pressure transducer, the second pressure transducer, the third pressure transducer, the first three-way connector, the second three-way connector, the third three-way connector, and the fourth three-way connector are capable of controlling the temperature through a thermotank. The CO2 adsorption dissolving by shale and diffusion coefficient under crude oil expansion condition are considered, so that the apparatus and the method have important guidance meaning for designing an on-site exploitation scheme.

The invention discloses a small grain airing granule collector which comprises a rack. The rack is in a right triangle shape. A grain collection board slot is formed in the inclined face of the rack. The portions, inside the grain collection board slot, of the upper end and the lower end of the inclined plane of the rack are provided with a rotatable driven shaft and a rotatable driving shaft respectively. One end of the driving shaft is in transmission connection with a power source arranged inside the rack. A chain conveying mechanism is installed between the driving shaft and the driven shaft. Four walking wheels are arranged at the bottom of the rack. A collection hopper is arranged at the lower rear portion of the rack. An armrest frame is fixedly arranged at the upper rear end of the rack. The small grain airing granule collector has the advantages that aired grains can be rapidly collected to be put into a barn or bagged or the like, the collection speed is high, the thorough collection rate is high, the small grain airing granule collector is particularly suitable for rush collection of aired grains when it rains, the grain airing collecting time is greatly shortened, the grains are rapidly put into the barn, and the phenomenon that the grains are wetted by rainwater due to the low grain collection speed is avoided; the structure is compact, using is flexible and convenient, operation can be carried out by one person, and the manufacturing and maintenance costs are low.

The invention discloses a device for measuring the competitive adsorption quantity of carbon dioxide and alkane in shale. The device is characterized in that a reaction container cover is arranged at the upper end of a reaction container; a piston is arranged in the reaction container; the reaction container cover is communicated with a second three-way joint; the second three-way joint is connected with a first three-way joint; the second three-way joint is connected with a third three-way joint; the third three-way joint is connected with a first storage tank; the third three-way joint is connected with a second storage tank; electronic scales are arranged below the second storage tank and the first storage tank; the lower end of the reaction container is connected with a four-way joint; the four-way joint is connected with a pressure sensor; the four-way joint is connected with a metering pump; a first three-way valve is connected with a vacuum pump; and the first three-way valve is connected with an oil gas separator and a gas meter sequentially. The device has the advantages that whether adsorption is balanced or not is rapidly judged through pressure change, the problem that a shale core is difficult to take is solvd, experimental operation is simple and rapid, and the device has important guiding significance in applying CO2 to develop a shale oil reservoir.

The invention discloses a universal adjustable box beam splicing and welding device, comprising a web inner clamping device, a web positioning device, and a flange plate positioning and clamping device. The web positioning device comprises clamping boards of a bottom part and an upper part, which are connected with each other; a T-shaped boss is arranged at the center of the bottom part; through holes II are formed at the both sides of the bottom part; the flange board positioning and clamping device comprises clamping blocks; a through hole I and a T-shaped groove are formed on each clamping block; the T-shaped boss is matched with the T-shaped grooves to form double-rectangular sliding rail fit; the two clamping blocks are connected with a screw rod III through the through holes I; an outer extending lug plate is arranged at the outer side of each clamping block; connection holes are formed on the lug plates; the connection holes are connected with a screw rod II; the through hole II 1 is connected with the screw rod II; the screw rod II is matched with a nut II; the web inner clamping device comprises two inner splints; the two inner splints are connected through the screw rod I; and the inner splints are matched with the clamping blocks in position. The universal adjustable box beam splicing and welding device is applicable to assembling and pairing box beams with various sizes, so that the splicing precision and the welding speed of the box beams can be improved.

The invention discloses a device and method for automatically welding a box beam. The device comprises a walking trolley, a main support, a welding gun supporting arm and a welding gun. The welding gun is arranged on the welding gun supporting arm through a hinge shaft, and the welding gun supporting arm is arranged on a vertical rectangular guide rail of the main support. The main support is matched with a horizontal rectangular guide rail of the walking trolley through a rectangular guide rail groove below the main support, and the welding gun can move along the horizontal rectangular guide rail and the vertical rectangular guide rail. In the welding process, the height and the angle of the welding gun are well adjusted according to the camber of the box beam and the positions of a flange plate and a box beam web, and therefore automatic welding can be achieved. According to the device and method for automatically welding the box beam, the structure is simple, adjustment is easy, box beams of various sizes can be conveniently and automatically welded, the labor intensity of welding personnel is lowered, rigidity is high, the bearing capability is high, machining and maintaining are easy, and cost is saved. The box type beam is automatically welded, besides, H-shaped steel used in a steel structure workshop can be automatically welded, and the accuracy of a profiling outline can be effectively ensured.

The invention discloses a device and a method for evaluating the carbon dioxide huffing-puffing recovery rate of shale oil. The device is characterized in that a radial rock core holder, a confining pressure pump and a first pressure sensor are respectively connected with a first tee joint, a simulated oil saturation pump, a third pressure sensor and the radial rock core holder are respectively connected with a fourth tee joint, the rock core holder, an oil-gas separator and a vacuum pump are respectively connected with a third tee joint, the oil-gas separator is communicated with the outside,the rock core holder is connected with a visual container, and the visual container, a second pressure sensor and a micro-injection pump are connected through a second tee joint; a CO2 storage tank is connected with the visual container; and the whole device controls the temperature through a thermotank. The device and the method allow the micro-crack and the matrix recovery rate to be respectively obtained, can analysis the contribution of adsorbed dissolved crude oil in organic matters to the recovery rate, and are of great significance to design an onsite exploitation scheme.

The invention discloses cotton stalk pulling equipment which comprises a traveling machine and two or more stalk pulling machines mounted on the traveling machine side by side, wherein the stalk pulling machines comprise standers, pull-out devices, cotton stalk conveying devices and power input shafts; the pull-out devices comprise pull-out shafts and two or more cutter groups mounted on the pull-out shafts; the pull-out shafts are inclined towards the forwarding direction of the cotton stalk pulling equipment from bottom to top; each cutter group comprises one or more pull-out cutters; pressing plates for pressing cotton stalks to incline forwards along the forwarding of the cotton stalk pulling equipment are arranged in front of the pull-out devices; the cotton stalk conveying devices comprise conveying channels and nail-tooth type conveying mechanisms; the inlet ends of the conveying channels are positioned on one sides of the pressing plates, and each nail-tooth type conveying mechanism comprises a first chain wheel shaft, a second chain wheel shaft and two conveying chains; a plurality of conveying nail teeth for shifting the cotton stalks pulled out by the pull-out cutters into the conveying channels and outputting the cotton stalks along the conveying channels are uniformly arranged on each conveying chain in a spacing manner. The cotton stalk pulling equipment is simple and compact in structure, low in manufacturing and maintenance cost, low in power requirement, low in pulling omission and flexible and convenient in use.

The invention provides a throttle valve device for each part of a metal die in a casting process, belongs to the technical field of a casting production process control device, and mainly solves the problems of casting defects such as shrinkage cavity, shrinkage porosity and crack of the key parts on a cast resulted from too high or too low cooling velocity which is extremely easily caused by the fact that the traditional cooling method can not accurately realize various cooling velocities required by various parts of the cast in a mold cavity of the die. The throttle valve device is mainly characterized by comprising a valve body, an air inlet channel arranged in the valve body, and an air inlet nozzle arranged at the end of the valve body; the valve body further comprises a plurality of air outlet channels arranged according to each part of the metal die, and a plurality of air adjusting mechanisms arranged between the air outlet channels and the air inlet channel. The throttle valve device has the characteristics of low manufacturing and maintaining cost, high field universality, convenience in management and flexibility in use; various cooling velocities of a plurality of parts of the same metal die are optionally realized on the same set of device; and furthermore, the throttle valve device is mainly used for cooling various metal dies.

The invention discloses an overhead type shutter opening and closing device. A plurality of window sheets are arranged in a window frame through a rotating shaft. Water leading grooves are formed in the inner side of the window frame. Each window sheet comprises a sealing plate internally provided with a shaft sleeve, vanes and water guiding grooves, wherein the vanes and the water guiding grooves are formed in the two sides of the sealing plate. The vanes of the window sheets and the water guiding grooves are in longitudinal end-to-end lap joint in the window frame. The two ends of the water guiding grooves are transversely connected with the water leading grooves correspondingly. Through the synergistic effect of the obliquely-arranged window vanes, flow guiding sheets, flow guiding grooves, flow leading grooves and the like, rainwater is prevented from entering a room. Each sealing plate internally provided with the correspondingly shaft sleeve is of a double layer structure, and the safe quality problems that corrosion falling, rotating clamping stagnation and the like generated from excessive wearing of fan blades caused by the fact that fan blades rotate frequently, and the rotating shaft is worn are solved. The overhead type shutter opening and closing device is simple in structure, convenient to use and low in manufacture and maintenance cost, the overhead type shutter opening and closing device is applied to an air exhausting opening of a cooling fan at the top of a train, a generator vehicle cooling device is optimized, the durability is high, rain, snow, wind and sand are prevented from entering a cooling room, the generator vehicle operational safety performance is improved, and the high and wide practicability is achieved.

The invention discloses a String body model device for an ultrasonic transcranial Doppler blood flow analyzer. A cavity of a water tank is provided with a support rod for hanging a Doppler probe, and a Doppler string rotates on the bottom surface of the water tank through a pulley block driven by a first motor. The first motor is driven by a controller unit. The main calibration items are blood flow velocity error, blood flow detection depth and blood flow direction identification. By injecting a proper amount of water or medium into the water tank as a human body medium and by clamping the Doppler probe with a rotatable, identifiable and angle-adjustable clamp unit, a spectrum is acquired. By moving the Doppler probe along a horizontal direction of the string transmission through a screw rod and performing the motion measurement, the parameters required for the blood flow velocity error, the blood flow detection depth and the blood flow direction identification are measured. The string body model device is simple in structure, cheap in production and maintenance cost, difficult to damage, easy to scrub, and compliant to relevant standards as a whole, and has high practicability and wide applicability.

The invention provides a test board structure for CDM (Charged Device Model) ESD current waveform detection, which is used for effectively catching discharge current waveforms consistent with typical waveforms in international general test standards. The test board comprises a pogo probe used for direct contact with a discharge device, a filter used for filtering away high frequency interference, an attenuator used for reducing current peak values and facilitating testing, a testing resistor used for converting current signals and an earth plate used for connecting all the parts. The filter and the attenuator are located on the earth plate; the earth plate is connected with a metal socket to be connected with an oscilloscope; the earth plate comprises a structure for fixing, which is used for connection with other parts of a testing system.

The invention discloses a long-strip-shaped polymer material feeding method and device. The long-strip-shaped polymer material feeding method comprises the steps that a feeding channel is arranged ina feeding device, raw materials are put into the feeding channel, and a gas driving device is used for blowing gas to the feeding channel to enable the raw materials to move in the feeding channel; and a positioning knife is arranged on the outer side of the feeding channel, when the gas driving device blows the gas to the feeding channel, the positioning knife can block the front of the raw materials in advance, so that the positioning knife can block the movement of the raw materials, and thus the distance of the movement of the raw materials is positioned. According to the long-strip-shapedpolymer material feeding method and device, feeding is carried out through an air-operated mode, the automatic feeding of thin-soft type and thin-long type polymer materials is effectively realized,and the automated production for processing super-small type polymer material products with ultrathin wall thicknesses and high precision is realized; meanwhile, the material use ratio is improved, the labor intensity of operators is reduced, and good economic benefits are obtained; the structure is simple, the manufacturing and maintenance costs are low, no site is occupied, and a feeding power medium is the gas; and compared with a traditional feeding device, the long-strip-shaped polymer material feeding device is safer and cleaner, and the operation is easier.

The invention relates to the technical field of sealing ring detection, in particular to a high-pressure sealing ring detection device which comprises a bottom plate, heightening plates are fixedly connected to the left portion and the right portion of the top end of the bottom plate, an adapter is arranged on the upper side of the bottom plate, and the left portion and the right portion of the bottom end of the adapter are fixedly connected with the top ends of the corresponding heightening plates. An accommodating cavity penetrating up and down is formed in the middle of the adapter; a supporting plate is fixedly connected to the middle of the bottom end of the adapter, a limiting column is fixedly connected to the middle of the top end of the supporting plate, the middle of the limitingcolumn is sleeved with a lantern ring, sliding rods are fixedly connected to the left portion and the right portion of the top end of the lantern ring, and a supporting ring is fixedly connected to the middle of the inner wall of the containing cavity; the circumferential outer wall of the sliding rod is in up-down sliding fit with the middle of the supporting ring, a lifting plate is fixedly connected to the left portion of the top end of the adapter, and a cantilever plate is fixedly connected to the top end of the lifting plate; the manufacturing and maintenance cost is low, and a user cantake and place the sealing ring conveniently.

The invention discloses a bottom mud suspending and sampling device for simulating ship disturbance and belongs to the technical field of water quality detection. The bottom mud suspending and sampling device comprises a supporting device, a connecting part connected with the supporting device, a driving part which is mounted at the bottom of the connecting part and is provided with an output end at the bottom, a propeller mounted at the output end at the bottom of the driving part, and a sampling part; through holes are formed in the middle of the propeller and the middle of the driving part, and the propeller and the driving part are communicated with each other; and the sampling part sequentially penetrates through the propeller and the driving part to be connected with the connecting part. According to the bottom mud suspending and sampling device for simulating ship disturbance, the situation that a ship is located at different river environments and sails at different allocated speeds is simulated, so that the effect of the suspending of bottom mud by the propeller can be observed, so that the condition of the pollution of the bottom mud can be embodied indirectly;data analysis and exploration are carried out from the radial and depth distances of the ship propeller, so that more possibilities are added for experimental results, and experimental data are more comprehensive.

The invention discloses a self-tapping thread bushing tool, and belongs to the technical field of control equipment in the casting production process. The self-tapping thread bushing tool mainly solves the problems that according to a traditional cooling method, different cooling speeds required by parts of a casting in a die cavity cannot be accurately met, and hole shrinkage, shrinkage porosity, cracks and other casting defects are extremely prone to happening to key parts of the casting due to too high or too low cooling speed. Different cooling speeds for multiple positions of the same metal die can be achieved at will through a set of device, and the self-tapping thread bushing tool has the beneficial effects of being fast in installation, capable of saving labor, flexible and reliable in work and is mainly used for cooling of various metal dies.

The invention discloses a transaction method of purchasing an item. The transaction method comprises the following steps: step 1, performing offline display in combination with an online shopping mallsystem; Step 2, performing offline experience try-on; Step 3, after offline experience is completed, returning the test article for test article matching, and preventing the test article from being manually exchanged; Step 4, performing online purchasing; And 5, delivering the item to home.

The invention belongs to the field of auxiliary equipment for distribution network operation, in particular to a foot fastener for power network climbing. By improving the existing foot fastener structure, a kind of surface which can grasp the pole and other structures better is proposed in this paper, Foot-buckle for improve grasping strength and grasp effect, On the one hand, the structure can be actively adjusted according to the diameter of the pole to be climbed, the maximum contact area in the climbing process is ensured by changing the deformation degree of the first elastic sheet and the position of the second elastic sheet, At that same time, the Z-shape structure of the foot pedal and the hinge structure of the foot pedal and the support ring are utilize to prevent the foot pedalfrom being locked dead due to the inclined squeeze in the use process, and the foot pedal can be inclined independently in the climbing process, and the foot pedal can be quickly released after the inclination, so that the climbing speed and the efficiency are improved, and the strength is saved.

The invention provides a collision energy absorbing and converting bracket chassis for an automobile, and aims at solving the common problems of complex structure, unreasonable design, high production and maintenance cost, large difficulty in repair and poor protection effect of existing automobile collision protection devices. The collision energy absorbing and converting bracket chassis for the automobile comprises a bottom plate, a front collision sliding beam and a rear collision sliding beam; a positioning block is fixed on the bottom surface of the bottom plate; the front collision sliding beam and the rear collision sliding beam which are both composed of sliding beams, supporting beams, bumpers and wheel pairs are inserted into the positioning block; the supporting beams of the front collision sliding beam and the rear collision sliding beam are connected by hinging and are equipped with torsional springs. The collision energy absorbing and converting bracket chassis for the automobile is scientific in design, simple in structure, low in cost of manufacturing and maintaining, and convenient to mount; the collision force of the automobile is successfully converted into the supporting force for supporting the weight of an automobile body according to the physical force transformation principle, and therefore, the converted force brings the automobile body the self defense function to protect the safety of the automobile body and a driver as well as passengers in case of collision.

The invention discloses a universal adjustable box beam splicing and welding device, comprising a web inner clamping device, a web positioning device, and a flange plate positioning and clamping device. The web positioning device comprises clamping boards of a bottom part and an upper part, which are connected with each other; a T-shaped boss is arranged at the center of the bottom part; through holes II are formed at the both sides of the bottom part; the flange board positioning and clamping device comprises clamping blocks; a through hole I and a T-shaped groove are formed on each clamping block; the T-shaped boss is matched with the T-shaped grooves to form double-rectangular sliding rail fit; the two clamping blocks are connected with a screw rod III through the through holes I; an outer extending lug plate is arranged at the outer side of each clamping block; connection holes are formed on the lug plates; the connection holes are connected with a screw rod II; the through hole II 1 is connected with the screw rod II; the screw rod II is matched with a nut II; the web inner clamping device comprises two inner splints; the two inner splints are connected through the screw rod I; and the inner splints are matched with the clamping blocks in position. The universal adjustable box beam splicing and welding device is applicable to assembling and pairing box beams with various sizes, so that the splicing precision and the welding speed of the box beams can be improved.

A cotton stalk pulling machine comprises a rack, a pulling device, a cotton stalk conveying device and a power input shaft. The pulling device comprises a pulling shaft and more than two knife sets mounted on the pulling shaft, the pulling shaft is arranged in a manner of inclining in an advancing direction of the cotton stalk pulling machine from bottom to top, each knife set comprises more than one pulling knife, a pressing plate pressing cotton stalks to incline forward along with advancing of the cotton stalk pulling machine is arranged in front of the pulling device, the cotton stalk conveying device comprises a conveying passage and a nail-tooth conveying mechanism, an inlet end of the conveying passage is positioned on one side of the pressing plate, the nail-tooth conveying mechanism comprises a first chain wheel shaft, a second chain wheel shaft and two conveying chains, and a plurality of conveying nail teeth used for moving the cotton stalks pulled up by the pulling knives into the conveying passage and conveying the same out along the conveying passage are arranged on each conveying chain at uniform intervals. The cotton stalk pulling machine is simple and compact in structure, low in manufacturing and maintaining cost, low in power requirement, low in pulling missing rate and flexible and convenient to use.

The invention belongs to the field of oil field chemistry, and in particular relates to an oil-water separation device for water-in-oil emulsion, which uses a small amount of demulsifier and water-wet porous particles to break the water-in-oil emulsion and realize oil-water separation. An oil-water separation device for water-in-oil emulsions, including: an emulsified water droplet coalescence device, and an oil-water gravity separation device. The invention can reduce the water content of crude oil to less than 1.0% at low demulsifier concentration, lower temperature and shorter time, which is energy-saving, environment-friendly and highly efficient; the raw materials of the water-wet porous particles used are common and the cost is low; During the process of the emulsion flowing through the coalescence device, since the surface of the water-wet porous particles is always covered by the water film due to capillary action, it can exert its performance for a long time, and the oil-water separation efficiency is always maintained at a high level, and the maintenance-free time is long; the overall The structure is simple, easy to manufacture and maintain, and the manufacture and maintenance cost is low; it is suitable for various types of water-in-oil emulsions and has a wide range of applications.

The invention discloses a label removal device for a double-end bottle washing machine. The label removal device comprises a soaking tank and a label removal box which are communicated with each other; one side of the label removal box is communicated with a label outlet pipe; two closed roller chains are arranged in the label removal box in a rotating mode; the two roller chains are driven by rotation of a driving chain wheel and a driven chain wheel which are arranged in the label removal box to rotate; a filter chain net is laid on the two closed roller chains; the filter chain net comprises an upper climbing section which is communicated with an outlet end of the soaking tank and the label outlet pipe; a rotating label removal brush is arranged below the top end side of the upper climbing section of the filter chain net; a lye circulation pipeline with a high-flow axial flow pump is communicated between the bottom end of the label removal box and the bottom end of the soaking tank to form the rapid water flow; a lye flushing pump is communicated in an inner chamber of the filter chain net; the lye flushing pump is connected with a bottle-washing flushing pipeline which is connected with a bottle-out flushing opening and a bottle-in flushing opening. According to the label removal device for the double-end bottle washing machine, the structural design is simple and practical, the manufacturing and maintenance cost is low, the label removal capability is high, and the requirements of a recovery bottle production line with the output which is more than 5000 pieces every hour can be met.

The invention discloses a tidying tool of injection molding parts. The tidying tool can quickly and conveniently tidy up injection molding parts produced through an injection molding machine, especially hole-shaped and frame-shaped injection molding parts so as to facilitate subsequent processing, packaging or transit shipment. The tidying tool is placed in an outlet of the injection molding machine, after the injection molding parts are produced, the injection molding parts can slip into the tidying tool and be arrayed tidily, so manual tidying time is saved and work efficiency is improved. The tidying tool is simple in structure and low in cost, and can be widely popularized and utilized.

The embodiment of the invention provides a vehicle over-length detection method and device for a stereo garage. The vehicle over-length detection method in the embodiment of the invention avoids the incomplete detection condition possibly due to single simple detection of the vehicle length in the prior art, and solves the problem that an accident happens in an automatic vehicle moving process ofthe stereo garage due to the fact that a part of over-length vehicles cannot be detected by stereo garage equipment in time. The vehicle over-length detection device in the embodiment of the inventiononly needs to increase one set or multiple sets of length measurement modules fixedly installed on the stereo garage based on the existing stereo garage; in a vehicle lifting process, the fact that the over-length condition of a whole vehicle is dynamically detected is realized; by utilization of the method in the embodiment of the invention, the upgrading cost of the stereo garage is low; a control system is not complex; the reliability is high; and the production and maintenance cost is low.

The invention provides a collision energy absorbing and converting bracket chassis for an automobile, and aims at solving the common problems of complex structure, unreasonable design, high production and maintenance cost, large difficulty in repair and poor protection effect of existing automobile collision protection devices. The collision energy absorbing and converting bracket chassis for the automobile comprises a bottom plate, a front collision sliding beam and a rear collision sliding beam; a positioning block is fixed on the bottom surface of the bottom plate; the front collision sliding beam and the rear collision sliding beam which are both composed of sliding beams, supporting beams, bumpers and wheel pairs are inserted into the positioning block; the supporting beams of the front collision sliding beam and the rear collision sliding beam are connected by hinging and are equipped with torsional springs. The collision energy absorbing and converting bracket chassis for the automobile is scientific in design, simple in structure, low in cost of manufacturing and maintaining, and convenient to mount; the collision force of the automobile is successfully converted into the supporting force for supporting the weight of an automobile body according to the physical force transformation principle, and therefore, the converted force brings the automobile body the self defense function to protect the safety of the automobile body and a driver as well as passengers in case of collision.

The invention provides an adjustable pump valve self-locking antiskid differential which is mainly composed of a differential shell, a gear pump, a bidirectional throttling valve and left and right semi-shaft gear rings. Two gear shafts of the gear pump respectively extend out of a driving gear lefttwards and rightwards to be meshed with the left and right semi-shaft gear rings of wheel semi-shafts; rotating speed difference of the left and right semi-shaft gear rings relative to the gear pump drives a gear shaft of the gear pump to automatically rotate to pump oil; when oil flow exceeds flow allowed to pass and set by the throttling valve, the throttling valve automatically closes and locks the gear shaft of the gear pump to disable continuous rotating so as to lock the left and right semi-shaft gear rings to rotate synchronously with the gear pump to stop a wheel on one side from sliding and idling and to drive a trapped wheel. By the adjustable pump valve self-locking antiskid differential, when the wheel on one side slides and idles, the left and right wheel semi-shafts can be quickly and automatically locked to synchronous running and can be automatically unlocked after a vehicle travels normally. The adjustable pump valve self-locking antiskid differential has the advantages of simple structure, low manufacturing and maintaining cost, adjustability in speed difference for triggering locking and large output torque.