37results about How to "Increase fluid output" patented technology

The invention relates to a composite nano fiber filtration material with photocatalysis / anti-bacterial functions and a preparation method of the filtration material. The filtration material comprises a supporting layer and a nano fiber filtration layer which adheres to the surface of the supporting layer, the nano fiber layer is uniformly filled with an photocatalyst and an antibacterial agent, and the preparation method comprises the following steps: 1, preparing a spinning liquid: dispersing a certain amount of the photocatalyst and the antibacterial agent into a solution uniformly to form a dispersion liquid, performing ultrasonic treatment, and adding a high polymer to form a stable and uniform electrostatic spinning solution; 2, performing electrostatic spinning: setting up electrostatic spinning parameters, and performing stretching on the spinning polymer solution at solid metal wire tips for wire production by utilizing an assembled needle head; and 3, performing slight dissolving treatment on the surface of the composite nano fiber filtration material by adopting solvent vapour recovery at a certain releasing speed to obtain the final composite nano fiber filtration material with the photocatalysis / the anti-bacterial functions. The composite nano fiber filtration material effectively solves a problem that the liquid outlet end of a current needle head / spray nozzle used for the electrostatic spinning is easy to block, can be directly used for decomposition of organic pollutants, inactivation of microorganism pathogenes and the like under visible light, and has excellent filtration performance at the same time.

The invention relates to a multilayer electret nanofiber filtering material and a preparation method thereof. The invention adopted the technical scheme is as follows: through an electric-field stepped increasing / reducing technology, utilizing a combined needle head for electrostatic spinning to realize deposition of spinning polymer solution on a receiving substrate to obtain nanofiber, carrying out slight dissolving treatment on the surface of a nanofiber layer by a certain release rate by adopting a recovery solvent steam, wherein the nanofiber layer is uniformly filled with electret materials and the diameter of the nanofiber layer is distributed in a stepped-increasing or stepped-reducing manner along the direction vertical to the breadth. According to the multilayer electret nano-fiber filtering material, the electret charge stability is extremely high, the surface electrostatic potential is 250-7000V, simultaneously the filtering performance is excellent, the filtering efficiency for 0.03-10 microns particulates is more than 99.997%, the resistance pressure drop is less than or equal to 39Pa, the service life is long, and the development and application prospect in the aspect of filtering materials for air purifiers, window gauzes, masks and filtering papers and the like are wide.

The invention discloses a lumen flusher. The lumen flusher comprises a bottle splicing needle and a liquid outlet unit, wherein the bottle splicing needle comprises a needle head for splicing a flushing liquid bottle, a needle base which is connected at the tail end of the needle head and an output tube which is arranged at the tail end of the needle base; the needle head and the needle base are cavity structures; the cavities are connected with the output tube in a penetration mode; a liquid outlet joint is arranged at the tail end of the output tube; the liquid outlet unit is connected with the liquid outlet joint in a matched mode through a liquid inlet joint arranged at an end opening of the liquid outlet unit; the liquid flows into the liquid outlet unit through the bottle splicing needle; the liquid outlet unit is further provided with a liquid outlet for the liquid to flow out. According to the scheme adopted by the invention, the flusher is stable in flow; the liquid outlet flow can be controlled by virtue of frequency of pressing a pushing rod; the liquid outlet flow is great when the pushing rod is quickly pressed, and the liquid outlet flow is small when the pushing rod is slowly pushed. The flusher disclosed by the invention is stable in liquid flow; and the liquid outlet flow can be controlled by virtue of frequency of pressing the pushing rod; the liquid outlet flow is great when the pushing rod is quickly pressed, and the liquid outlet flow is small when the pushing rod is slowly pushed.

The invention discloses a quantified liquid supply device which comprises a liquid feeding unit and a liquid drain unit. A circle of annular liquid feeding groove around the axial lead of a rotation core is arranged on the outer wall of the rotation core, a set of liquid feeding pipelines is arranged in the rotation core and is composed of at least two liquid feeding channels which are communicated with each other in a crossed mode, and the cross point of liquid feeding channels is located on the axial lead of the rotation core. Liquid inlets of all liquid feeding channels are formed in the annular groove, and liquid outlets of the liquid feeding channels are formed in the outer wall of the rotation core. A circle of annular liquid drain groove around the axial lead of the rotation core is arranged on the outer wall of the rotation core, a set of liquid drain pipelines is formed in the rotation core and is composed of at least two liquid drain channels which are communicated with each other in a crossed mode, the cross point of the liquid drain channels is located on the axial lead of the rotation core, liquid outlets of the liquid drain channels are formed in the annular groove, and liquid inlets of the liquid drain channels are formed in the outer wall of the rotation core.

The invention discloses a numerical control wire-cutting fluid feeding method and a fluid feeding device; when wire-cutting machining is carried out on a workpiece, working fluid is enabled to spray to a molybdenum wire machining area all the time along a gap space machined on the workpiece; an included angle between a spraying direction of the working fluid and a molybdenum wire is N which is greater than 0 degree and less than 90 degrees. According to the method and the device disclosed by the invention, the cut gap space is utilized skillfully and a large-volume fluid feeding channel is formed between the machined molybdenum wire and a nozzle, so the fluid feeding amount of the channel is expanded timely and effectively, the fluid resistance of a working fluid discharge channel is reduced, the fluid exchange capacity in the molybdenum wire machining area is obviously improved, the problems of secondary discharge or short circuit and the like due to poor chip removal are prevented, and the wire-cutting machining efficiency and quality are ensured.

The invention discloses an oil extraction method of weight adding under a pump and an oil well pump with weight adding under the pump, used in pumping units and oil pumped wells in the petroleum industry. In the oil extraction method of weight adding under the pump, a weight adding bar is connected under an oil well pump plunger assembly to reduce the bend and the deformation of a pumping rod string. The oil well pump with weight adding under the pump comprises a pump cylinder assembly, the plunger assembly and an auxiliary mechanism under the pump. The plunger assembly is provided with a liquid outlet valve and a liquid inlet pump, an upper plunger and a lower plunger are connected with a connection bar through a plunger lower joint to connect the weight adding bar under the plunger assembly. The method uses the liquid inlet valve with an offset structure outside the pump while adding weight under the pump, thereby lightening the eccentric wear of pipes and bars and reducing the stroke loss. Due to the weight adding bar arranged under the pump, the pumping rod is kept in the straightening state all the time under the action of gravity, thereby lightening the mutual abrasion of the pipes and the bars. The weight adding under the pump can reduce the elastic bending and deformation of the pumping bar string, thereby reducing the stroke loss and enhancing the filling factor of the oil well pump.

The invention discloses a quantified liquid supply device which comprises a liquid feeding unit and a liquid drain unit. A circle of annular liquid feeding groove around the axial lead of a rotation core is arranged on the outer wall of the rotation core, a set of liquid feeding pipelines is arranged in the rotation core and is composed of at least two liquid feeding channels which are communicated with each other in a crossed mode, and the cross point of liquid feeding channels is located on the axial lead of the rotation core. Liquid inlets of all liquid feeding channels are formed in the annular groove, and liquid outlets of the liquid feeding channels are formed in the outer wall of the rotation core. A circle of annular liquid drain groove around the axial lead of the rotation core is arranged on the outer wall of the rotation core, a set of liquid drain pipelines is formed in the rotation core and is composed of at least two liquid drain channels which are communicated with each other in a crossed mode, the cross point of the liquid drain channels is located on the axial lead of the rotation core, liquid outlets of the liquid drain channels are formed in the annular groove, and liquid inlets of the liquid drain channels are formed in the outer wall of the rotation core.

The invention relates to a combined needle used for electrostatic spinning. The combined needle is characterized by comprising a hollow stainless steel needle body and a stainless steel needle base with a discharging tip, and an inner thread is arranged on the bottom surface of the hollow stainless steel needle body; a fastening piece of a double-thread locking structure is adopted by the stainless steel needle base with the discharging tip, and a solid metal wire is fixedly arranged on the upper portion of the stainless steel needle base, so that it is achieved a spinning polymer solution is drawn at the tip of the solid metal wire so as to generate silk; the solid metal wire is welded to the center of a hollow-out support on the inner wall of the outer thread of the stainless steel needle base, and the solid metal wire can be higher than, equal to or lower than the hollow stainless steel needle body. By means of the combined needle, the problems that the liquid outlet end of an existing needle / sprayer used for electrostatic spinning is likely to be blocked, and the multi-jet stability is poor are effectively solved, the spinning solution outlet amount in unit time is increased, and the electrostatic spinning speed is greatly increased.

The invention provides an all-metal conical combined screw pump suitable for the petroleum field, and the technical problems that an existing all-metal screw pump is short in service life and is subjected to sticking can be solved. The all-metal conical combined screw pump suitable for the petroleum field comprises a stator, a rotor, a sleeve pipe and a sucker rod. The all-metal conical combined screw pump is characterized in that an internal threaded curved surface and an external threaded curved surface are each of a conical spiral structure and have the same taper, and the end, with the larger radial dimension, of the internal threaded curved surface and the end, with the larger radial dimension, of the external threaded curved surface are close to the sucker rod. The all-metal conicalcombined screw pump further comprises an elastic telescopic assembly which comprises a movable part, a fixed part and an elastic part, wherein the movable part is fixedly connected with the rotor, thefixed part is fixedly connected with the sucker rod, and the movable part and the fixed part are vertically matched with each other in a sliding manner and can transmit torque for the sucker rod andthe rotor; and one end of the elastic part abuts against the movable or the rotor, the other end of the elastic abuts against the fixed part or the sucker rod, and the elastic part can elastically contract or elastically expand in the sliding direction of the movable part.

The invention discloses a preparation method of a perovskite solar cell. The method comprises steps that perovskite precursor solution is coated on a substrate by adopting a flat needle head; the flatneedle head comprises an interface part and a needle head part which are communicated with each other, the interface part is used for being connected with a storage container of the perovskite precursor solution, and the needle head part is used for coating the perovskite precursor solution; the needle head part comprises an opening end and a connecting end, and the connecting end is connected with the interface part; the opening end is of a flat structure, the width of the opening end is 5-20000 times of the maximum thickness of the connecting end, and the width of the opening end is 2-100 times of the width of the connecting end. The method is advantaged in that coating efficiency can be improved, and photoelectric conversion efficiency of the solar cell is improved.

The invention discloses an ultraviolet-proof nano-fiber composite screen window and a production method thereof. The production method includes: using an electrostatic spinning combined needle to perform stretching and silk yielding of a spinning solution doping a ultraviolet screening agent on a sharp end of a solid metallic wire, and depositing the silk on a screen window basal material; using recovered solvent vapor to perform slight soluble treatment on a surface of a nano-fiber layer at a certain releasing speed; and fusing the covering protection layer, the nano-fiber layer and the screen window basal material through an ultrasonic composition method, and acquiring the ultraviolet-proof nano-fiber composite screen window. The problem that the conventional electrostatic spinning needles / sprayer outlet ends are blocked can be solved, the ultraviolet-proof nano-fiber composite screen window can prevent ultraviolet light and has excellent filtering performance; the ultraviolet transmittance of the composite screen window is less than or equal to 2.5%, the ultraviolet-proof coefficient level is greater than 40; for particles whit the size of 0.3-10 [mu]m, the filtering efficiencyof the composite screen window is greater than or equal to 90%; the resistance pressure drop is 10-30 Pa, and the light transmittance is greater than or equal to 68%; and the ultraviolet-proof nano-fiber composite screen window has wide development prospect in an indoor air filter market.

The invention provides a special bidirectional liquid-outlet filter board for a filter press. The special filter board comprises a filter board, which contains an inner plate and a clamping plate. The inner plate is positioned inside the clamping plate. The structure is simple and the design is reasonable. Two sides of the clamping plate are both provided with a liquid outlet and a support frame. The liquid outlet is provided with a liquid outlet nozzle, which is provided with a control valve. Two sides of the bottom of the inner plate are both provided with liquid outlet holes. There are five liquid outlet holes, thus increasing liquid output capacity and enhancing liquid output speed of the whole unit. After deloading, liquid containing capacity of the filter board is greatly reduced, and lots of manpower and material resources are saved. Meanwhile, a mounting lug arranged on the inner plate, and a mounting groove arranged in an outer plate, are used in cooperation. Therefore, the clamping effect is better, the installation is convenient, and cost is lower. The product can better meet requirements of users.

The invention relates to a method for using a coiled tubing cut restoration device. The technical solution is: the upper part of the transitional connection sleeve is connected to the upper pressure cap through the connecting bolt, the key sleeve is placed under the upper pressure cap, the key sleeve is provided with an inner key groove, and the inner key groove is matched with the outer key of the repair port jacket, and the repair port jacket is The lower part is provided with a T-shaped groove, and the bottom of the inner mold of the repair port is a cone structure, and is provided with a plurality of air injection holes, through which the air injection holes communicate with the one-way valve in the inner cavity of the inner mold of the repair port, the beneficial effect is: The cooperation of the plate and the transitional connection sleeve, key sleeve, repair port jacket, repair port inner mold and upper pressure cap effectively controls the toxic gas, avoids a large amount of leakage, and also avoids self-spray or overflow, and realizes The reaming and repairing of the straight incision greatly increases the liquid output or gas output, solves the current problems in the use of coiled tubing, and further promotes the application of coiled tubing.

The invention relates to a using method of a coiled tubing incision restoration and repair device. According to the technical scheme, the using method comprises the steps that upper pressing caps areconnected with the upper parts of transitional connecting sleeves through connecting bolts, key sleeves are arranged below the upper pressing caps, the key sleeves are provided with inner key grooves,the key sleeves are matched with outer keys of repair port outer sleeves through the inner key grooves, and T-shaped grooves are formed in the lower parts of the repair port outer sleeves; and the bottoms of inner molds of repair ports are of a cone structure, a plurality of injection holes are formed in the bottoms of the inner molds of the repair ports, and the bottoms of the inner molds of therepair ports are in communication with one-way valves in inner cavities of the inner molds of the repair ports through the injection holes. The using method of the coiled tubing incision restorationand repair device has the beneficial effects that through the cooperation of a fully sealed wedge disc, the transitional connecting sleeves, the key sleeves, the repair port outer sleeves, the inner molds of the repair ports and the upper pressing caps, toxic gas is effectively controlled, a large amount of leakage is avoided, self-spraying or overflowing is further avoided, reaming repair of a linear shaped incision is realized, the liquid output or gas output is greatly improved, the problems in the current use of coiled tubing is solved, and the application of the coiled tubing is further promoted.

The invention discloses a liquid medicine processing device for a traditional Chinese internal medicine department and relates to the technical field of medicine processing mainly to solve the problemof waste caused by liquid medicine left in dregs of a decoction. The liquid medicine processing device comprises a processing box body. The top end wall of the processing box body is provided with aliquid inlet end port, and the bottom side wall of the processing box body is provided with a liquid discharging end port. The liquid inlet end port is internally provided with a first filtering net plate and a second filtering net plate. The processing box body is internally provided with an extruding cylinder net groove located in the bottom end of the first filtering net plate. The inner side of the first filtering net plate is provided with an extruding assembly which is used for extruding the dregs of the decoction. The upper side of the extruding assembly is provided with a power mechanism which drives the extruding assembly to extrude the dregs of the decoction. The top wall of the processing box body is provided with a rotating mechanism which drives the extruding rotary disk to rotate. The liquid medicine processing device is simple in structure, extrusion processing effect for the dregs of decoction is obvious, the dregs of the decoction are convenient to discharge, operationis easy, convenient and rapid, and the practicality is relatively high.

The invention relates to a discharge assisting and liquid increasing device of an oil pumping machine, which is characterized by mainly comprising an upper joint, a core pipe, a spring, a sealing bowl assembly, a sealing ring, a steel ball, a ball seat and a lower joint, wherein the core pipe is formed into a core pipe whole by inserting, fixing and connecting a core pipe body A and a core pipe body B, the upper end of the core pipe body A is in threaded connection with the upper joint, a sealing frame in sliding fit with the core pipe body A is arranged on the core pipe body A, a bowl-shaped sealing expansion ring is sleeved on the sealing frame, the sealing ring is arranged at the lower part of the sealing expansion ring, four axial semicircular long slots which are uniformly distributed in the inner hole of the core pipe body B are coincided and connected with the inner holes, a ball blocking rod is arranged at the upper part of the inner hole of the core pipe body B, the ball seat is arranged at the lower part of the inner hole of the core pipe body B, the steel ball is arranged on the ball seat, and the lower end of the core pipe body B is in threaded connection with the lower joint. The invention has the advantages that the discharge assisting and liquid increasing device is connected with an oil pumping rod string in segments and is used for lifting the crude oil in an oil pipe in segments, and the ascending resistance of a plunger piston is lightened, thereby reducing the internal leakage of a pump barrel and increasing the fluid production rate of an oil well.

The invention discloses a cavity fine polishing device for wood-like handrails in landscape architecture, which comprises a polisher, a grinding wheel is arranged at the bottom of the polisher, a liquid spraying mechanism is fixedly mounted on the outer wall of the polisher, and the liquid spraying mechanism is mounted on the outer wall of the polisher. Transverse vibration generated by the grinding machine enables the small balls with a certain mass to stretch the movable rod to swing left and right together, so that the T-shaped sponge stained with the polishing agent is extruded through the extrusion plate, the polishing agent is extruded out, and finally the polishing agent is dispersed from the multiple flow guide grooves through the protruding flow guide plate and flows down to the surface of a mold. The grinding machine is matched to move towards one side close to the liquid spraying mechanism, so that the function of spraying the polishing agent and polishing at the same time can be realized, and the polishing efficiency is improved; the T-shaped sponge extrusion device has the advantages that by arranging the rotating balls, the T-shaped sponge is extruded by the extrusion plate in a rolling manner while being extruded by the extrusion plate, and the extrusion effect on the T-shaped sponge is improved by matching with a plurality of convex blocks arranged on the inner wall of the mounting ring body.

The invention provides a cleaning device easy to clean. The cleaning device comprises a main machine body and a tray support. A control system, a cleaning liquid supply system, a sewage recovery system and a cleaning system are arranged on the main machine body. And the control system is electrically connected with the cleaning liquid supply system, the sewage recovery system and the cleaning system. The cleaning system comprises a ground brush and a rolling brush. The rolling brush is arranged in the floor brush and located on the front portion of the floor brush. And one end of the rolling brush is connected with a cleaning liquid supply system. And a liquid outlet pipeline and a liquid outlet are arranged in the rolling brush. A driving mechanism is arranged in the ground brush and can drive the rolling brush to rotate. The control system can control the rotation speed of the rolling brush. And a clean water hole is formed in the floor brush. The clean water hole is formed in one end close to the rolling brush in the floor brush.

The invention relates to a oil industry wellhead repair device. The technical solution is: the upper part of the transitional connection sleeve is connected to the upper pressure cap through the connecting bolt, the key sleeve is placed under the upper pressure cap, the key sleeve is provided with an inner key groove, and the inner key groove is matched with the outer key of the repair port jacket, and the repair port jacket is The lower part is provided with a T-shaped groove, and the bottom of the inner mold of the repair port is a cone structure, and is provided with a plurality of air injection holes, through which the air injection holes communicate with the one-way valve in the inner cavity of the inner mold of the repair port, the beneficial effect is: The cooperation of the plate and the transitional connection sleeve, key sleeve, repair port jacket, repair port inner mold and upper pressure cap effectively controls the toxic gas, avoids a large amount of leakage, and also avoids self-spray or overflow, and realizes The reaming and repairing of the straight incision greatly increases the liquid output or gas output, solves the current problems in the use of coiled tubing, and further promotes the application of coiled tubing.

The invention relates to a foam pump which is designed for solving the technical problems that the existing similar products are poor in foam effect due to poor structural design, are mainly poor in gas storage and gas outlet effects, and are difficult to be used as foam with large liquid outlet quantity. The large ring of the foam pump comprises an inner ring and an outer ring, the inner ring is an air storage part, the outer ring is a decorative ring, and the inner wall of the bottom of an inner groove of the air storage part is provided with an internal thread, and is characterized in that an inner cavity where the air storage part and the decorative ring are sleeved in a sealed mode is provided with a piston part, a connecting part and a jumping valve, and the piston part is clamped and fixed to the connecting position of the connecting part and the jumping valve; an outer diameter loose blade of the piston part abuts against the inner wall of the inner cavity in a sealed mode, the inner cavity is divided into an upper inner cavity body and a lower inner cavity body through the piston part, and a vent hole is formed in the position, between the connecting part and the jumping valve, of the piston part. When a head cap is pressed, the head cap drives the jumping valve, the piston part, the connecting part and the pump core internal part to move downwards, the vent hole of the piston part is closed, and air in the lower inner cavity and liquid flowing out of the valve rod at the pump core are fused to spray foam.

The invention particularly relates to a method and system for preparing ethanol through efficient gas fermentation, and belongs to the field of biological fermention.The method comprises the steps that industrial tail gas is fermented, and mash is obtained; carrying out solid-liquid separation on the mash to obtain a mash clear phase and a thallus concentrated phase; and performing liquid-liquid separation on the mash clear phase to obtain a dealcoholized clear phase and an ethanol concentrated phase, and recycling the dealcoholized clear phase for fermentation. A dealcoholization clear phase is separated from mash obtained by fermenting industrial tail gas, and the dealcoholization clear phase is reused in the fermentation process. When the concentration of ethanol in the mash is too high, the liquid outlet amount of the dealcoholization clear phase can be increased by increasing the liquid outlet amount of the mash, and then the dealcoholization clear phase is returned to the mash, so that the concentration of ethanol in the mash can be reduced. Through the arrangement, the ethanol can be continuously extracted from the mash in the process of preparing the ethanol by fermentation, the concentration of the ethanol is further stably controlled, and meanwhile, most of water is recycled for fermentation along with the dealcoholization clear phase, so that the water consumption of unit ethanol is greatly reduced.

The invention relates to a composite nano fiber filtration material with photocatalysis / anti-bacterial functions and a preparation method of the filtration material. The filtration material comprises a supporting layer and a nano fiber filtration layer which adheres to the surface of the supporting layer, the nano fiber layer is uniformly filled with an photocatalyst and an antibacterial agent, and the preparation method comprises the following steps: 1, preparing a spinning liquid: dispersing a certain amount of the photocatalyst and the antibacterial agent into a solution uniformly to form a dispersion liquid, performing ultrasonic treatment, and adding a high polymer to form a stable and uniform electrostatic spinning solution; 2, performing electrostatic spinning: setting up electrostatic spinning parameters, and performing stretching on the spinning polymer solution at solid metal wire tips for wire production by utilizing an assembled needle head; and 3, performing slight dissolving treatment on the surface of the composite nano fiber filtration material by adopting solvent vapour recovery at a certain releasing speed to obtain the final composite nano fiber filtration material with the photocatalysis / the anti-bacterial functions. The composite nano fiber filtration material effectively solves a problem that the liquid outlet end of a current needle head / spray nozzle used for the electrostatic spinning is easy to block, can be directly used for decomposition of organic pollutants, inactivation of microorganism pathogenes and the like under visible light, and has excellent filtration performance at the same time.

The invention relates to an oil industry wellhead repairing device. According to the technical scheme, the upper portion of a transition connecting sleeve is connected with an upper pressing cap through connecting bolts, a key sleeve is installed under the upper pressing cap, inner key grooves are formed in the key sleeve, the key sleeve is matched with outer keys of a repairing port jacket through the inner key grooves, the lower portion of the repairing port jacket is provided with T-shaped grooves, the bottom of a repairing port inner die is of a cone structure and provided with multiple gas injection holes, and the repairing port inner die communicates with a one-way valve arranged in an inner cavity of the repairing port inner die through the gas injection holes. The oil industry wellhead repairing device has the beneficial effects that through cooperation of a full gate sealing plate with the transition connecting sleeve, the key sleeve, the repairing port jacket, the repairing port inner die and the upper pressing cap, poisonous gas is effectively controlled, large-amount leakage is avoided, and automatic jetting or overflowing is avoided; and in addition, reaming repairingof a linear notch is achieved, the liquid outlet amount or the gas outlet amount is significantly increased, the problems in existing use of a coiled tubing are solved, and application of the coiled tubing is further promoted.

The invention discloses a breathing type shield scraper with a wear-resistant function, and belongs to the field of shield cutters. According to the breathing type shield scraper with the wear-resistant function, the liquid outlet amount of improvement liquid can be reduced when the soil of a soil layer is improved by using the improvement liquid and the soil of a rock wall is soft and the scraper is worn slightly, and the liquid outlet amount of the improvement liquid can be increased when the soil of the rock wall is hard and the scraper is worn severely. A breathing bag (3) is similar to the lung of organisms, the supplement of the improvement liquid is a lung inspiration process while the discharge of the improvement liquid is a lung expiration process, the whole process is completely automatic, additional power does not need to be added, the situation that the excessive improvement liquid is sprayed is avoided, too humid tunneling environment cannot be caused easily, normal work of workers cannot be affected, the loss of the shield scraper in the tunneling process is greatly reduced, the shield scraper does not need to be frequently replaced, and the use cost of a shield tunneling machine is reduced.

The invention discloses a uterine horn embryo-flushing needle suitable for sheep, which is used for recovering sheep uterine horn embryos. The uterine horn embryo-flushing needle comprises a needle tube, a connection tube and a tail tube, wherein the needle tube is a hollow tube, the front part of the needle tube is a bevel needle point, and the middle part of the needle tube is provided with a strip-shaped hole; the front part of the tail tube is a tubule, and the rear part of the tail tube is a horn-shaped opening; and the connection tube is a strip-shaped flexible hollow tube, one end of the connection tube is connected with the rear part of the needle tube, and the other end of the connection tube is connected with the front part of the tail tube. The uterine horn embryo-flushing needle also comprises a filter which is connected with the tail tube. The outside diameter of the needle tube of the embryo-flushing needle is small, so that the embryo-flushing needle causes small damages to the inner membrane of the sheep uterine horn; and the liquid yielding quantity of the strip-shaped hole on the needle tube is high, so that the embryo recovery is smooth.

The invention relates to a liquid increasing device for washing wells and belongs to equipment for washing wells. The liquid increasing device for washing wells includes a body and is characterized in that an upper liquid inlet hole is arranged on the upper portion of the body, a liquid outlet hole is arranged on the lower portion of the upper liquid inlet hole, the upper liquid inlet hole is communicated with the liquid outlet hole, a liquid inlet ball valve is movably arranged on the liquid inlet hole, and a ball valve chamber with a movable ball valve inside is arranged on the liquid outlet hole. The liquid increasing device for washing wells can avoid well killing function to oil layers caused by well washing liquid during traditional thermal washing and pollution to oil layers after well washing liquid is immersed in the oil layers, improves swabbing capacity of a oil well pump, reduces pump leakage and improves pump efficiency.