37results about How to "Change travel distance" patented technology

The present invention discloses a disc cutting device which can be consistent with the width of a medium to carry out the cutting processing effectively. The disc cutting device comprises a fixing knife arranged in the width direction of the medium; a circular knife moving along the fixing knife, and cutting the above medium with the above fixing knife cooperatively; a first standby position sensor and a second standby position sensor which can move in the above width direction, and are configured at one side and the other side of the outer side of the width (breadth) of the above medium; a detection board detected by the above first and second standby position sensors; and a circular knife part rotating freely to support the above circular knife, possessing the above detection board, and moving between the above first and second standby position sensors.

The invention discloses a large-stroke actuator based on piezoelectric ceramic driving and belongs to the technical field of actuators, which matches the work by arranging a piezoelectric ceramic pile, a slider and a stroke amplifying unit and drives the slider to move based on the reverse piezoelectric effect of a piezoelectric ceramic body; then, the movement of the slider is converted into a relative rotation of two connecting rods in the stroke amplifying unit; after that, the stroke of the slider is amplified and transmitted to an inserting-pulling member through a stroke amplifying mechanism to complete inserting / pulling process of the inserting-pulling member. The actuator in the invention is simple in structure, easy to set; the sliding stroke of the slider can be greatly enlargedthrough the stroke amplifying mechanism; the whole process is simple in control, strong in recoverability and high in precision; the change of the stroke driving distance of the actuator can be realized by changing the setting number of the stroke amplifying unit and / or the sliding distance of the slider, thereby greatly improving the compatibility of the actuator, achieving large stroke control of the actuator, and having a good promotion and application value.

The invention discloses a box shifting mechanism matched with a row spacing adjustable transplanter, which relates to the technical field of transplanters. A drive screw mandrel in the box body is provided with two head-to-head thread grooves which are opposite in phase; the drive screw mandrel is connected with driving nuts matching the two thread grooves; each driving nut is provided with a connecting hole which is parallel to the axial direction of the drive screw mandrel; and a box shifting rod in the box body is fixedly connected in the connecting hole of the driving nut. The invention is characterized in that the drive screw mandrel is detachably connected with a guide arc piece which can form a continuous part with the intersected part of the two thread grooves, and the guide arc piece is provided with a thread groove. The guide arc piece can be replaced conveniently, and the shifting distance of the driving nut on the drive screw mandrel can be changed by replacement of different guide arc pieces, thus realizing of changing the reciprocating stroke of box shifting. The invention has the advantages of simple and reasonable structure, convenient production, convenient use and easy replacement, and can change the reciprocating stroke of the driving nut.

The invention discloses a non-slip universal wrench, comprising: a handle; a wrench head, which is arranged at the end of the handle; a round hole is arranged on the wrench head; head wall; six grooves are evenly distributed on the wrench head; slider, the bottom of which is hinged at the bottom of the groove, the outer side of the slider is inclined, and the inclined surface is inclined toward the bottom of the groove; there are six sliders in total, six sliders They are installed in six grooves respectively; the six sliders form a structure matching the hexagonal head of the bolt; the outer circumference of the wrench head is provided with an external thread, and a nut matching the external thread is also provided, and the inner wall of the nut and the slider are arranged It also has nylon blocks. The nylon blocks are arranged on the two side walls of the groove. The slider and the nylon blocks have an interference fit, which can adapt to the installation of bolts of different sizes.

A machining device for a female hinge of a three-wing hinge comprises a worktable. A female hinge guiding rail for placing a female hinge sectional material is arranged on the worktable. An auxiliary clamping device, a conveyor, a groove cutting machine, a punching machine, a drilling machine and a cutting machine which are connected with a controller correspondingly are arranged on the worktable in the advancing direction of the female hinge sectional material in sequence. The auxiliary clamping device and the conveyor are sequentially arranged in the position, at the front end of the female hinge guiding rail, of the worktable. The groove cutting device is arranged in the position, close to the conveyor, of the worktable and located on one side of the female hinge guiding rail. The punching machine and the drilling machine are sequentially arranged on the upper position, close to the groove cutting machine, of the female hinge guiding rail. The cutting machine is arranged in the position, close to the drilling machine, of the worktable and located on one side of the female hinge guiding rail. The machining device has the advantages of high mechanization degree, high production efficiency and high machining precision and the like.

The invention discloses an expanding type breathing apparatus. The expanding type breathing apparatus includes an oxygen bottle, a back frame, a breather pipe, straps, a rotating buckle structure, longitudinal adjustment mechanisms, telescopic rods and expansion elastic bodies. According to the expanding type breathing apparatus, positioning plates are slidably connected into expansion grooves ofa back plate in a clamped mode through the telescopic rods on one sides, the expansion elastic bodies are connected to the telescopic rods in a sleeving mode and are located in the expansion grooves,and both ends of the expansion elastic bodies are elastically squeezed between the inner walls of the expansion grooves and driving plates, so the expansion elastic bodies squeeze the driving plates towards the middle to drive the telescopic rods and the positioning plates to move to the middle. According to different shoulder widths, the positioning plates and the telescopic rods can be stretchedto the outside to adapt to the different shoulder widths.

The invention discloses a mandibular ascending branch inner side drag hook special for maxillofacial surgery and relates to the technical field of medical treatment. The mandibular ascending branch inner side drag hook comprises an L-shaped grab handle and an end rod, an angle adjusting mechanism is mounted on one side of the L-shaped grab handle, an extension rod is mounted on one side of the angle adjusting mechanism, a locking nut is connected to one side of the extension rod, a supporting rod is connected to one side of the locking nut, an inner groove is formed in the supporting rod, an adjusting nut is arranged in the inner groove, a connecting screw rod penetrates through the adjusting nut, and an auxiliary lighting mechanism is installed on one side of the connecting screw rod. Themandibular ascending branch inner side drag hook is provided with an end rod, a bent hook and a supporting rod. The arc-shaped structure of the end rod can effectively adapt to the internal conditionof the oral cavity, the hook can hook the lower jaw ascending branch to expose the operation field, the inferior alveolar nerve can be prevented from being damaged, and the integrated structure of the end rod, the hook and the supporting rod can improve the convenience of force application.

The invention relates to an intensive horizontal reciprocating synchronous moving apparatus, which relates to the technical field of a cabinet body moving apparatus in a house. The intensive horizontal reciprocating synchronous moving apparatus comprises a chassis and a moving arrow light, wherein the upper end of the chassis is provided with a first guide mechanism, the upper end of the first guide mechanism is provide with a wooden cabinet body, the moving arrow light is embedded in the front surface of the wooden cabinet body, one side of the chassis is connected with an edge cabinet base,two sides of the lower end of the edge cabinet base are respectively provided with an adjustable foot, the lower end of each adjustable foot is fixedly provided with a pressure plate, and an expansionbolt is arranged inside the pressure plate. The intensive horizontal reciprocating synchronous moving apparatus has the beneficial effects that the wooden cabinet body can slide along a cylindrical guide rail by using a semicircular guide block, when the opening of an edge cabinet or the operation for the edge cabinet are limited by the wooden cabinet body, the wooden cabinet body can slide towards another side on the chassis, and the wooden cabinet body leaves the edge cabinet, so that the wooden cabinet body can be prevented from blocking the wooden cabinet body.

The invention provides a dosing metering pump, which comprises a base, a stroke control chamber arranged on the base, a liquid medicine circulation pump and a drive motor; the liquid medicine circulation pump is fixedly connected with the outer wall of the stroke control chamber through a fixing connection piece; a liquid medicine passage is arranged in the liquid medicine circulation pump; one end of the liquid medicine passage is provided with a liquid inlet and the other end is provided with a liquid outlet; the side of the liquid medicine passage is provided with an opening, and the opening is sealed with a diaphragm which can be deformed under the action of an external force; a push-pull mechanism is arranged in the stroke control chamber; and the push-pull mechanism comprises a push-pull rod, an eccentric disk, a base shaft and a rotary drive mechanism; one end of the rotary drive mechanism is connected with the drive motor and the other end is connected with the base shaft; theeccentric disk is sleeved on the base shaft; the lengths of two ends of the eccentric disk away from the base shaft are different; the end of the eccentric disk abuts against one end of the push-pullrod, and the other end of the push-pull rod is connected with the diaphragm. The dosing metering pump provided by the invention is used for measuring and adding liquid medicine, and the dosing metering has high precision, stable operation and strong corrosion resistance.

The invention relates to the technical field of medical treatment, and discloses a self-testing bracelet for uremia hemodialysis internal fistula. The self-testing bracelet comprises wrist straps, wherein a fixing plate is movably connected between the wrist straps and supports a display panel, and the display panel is movably connected to the surface of the fixing plate. Through cooperative use of a massage block, a limiting plate and a first connecting rod, the massage block is capable of massaging the acupuncture points of the arm, so that the bracelet is more comfortable to use; the movingdistance of the massage block can be changed, the massage degree is changed, and automatic adjustment can be conducted according to different requirements; through cooperative use of the display panel, a pointer, a first gear and a second gear, a blood transfusion tube can be displayed when deviating in the dialysis process, observation can be conducted visually, and medical staff can be remindedto conduct treatment; and through cooperative use of a movable polar plate and a fixed polar plate, an alarm cannot be triggered when the blood transfusion tube moves within a controllable range, andan alarm prompt can be triggered when the maximum deviation is reached.

The invention belongs to the technical field of mechanical stepping control on fluid power sources and particularly relates to an automatic reversing type bidirectional stepping piston. The automatic reversing type bidirectional stepping piston comprises a stepping piston cylinder, an annular piston and a stepping piston shaft, wherein the annular piston is sleeved with the stepping piston cylinder and moves in the middle of the stepping piston cylinder; the stepping piston shaft penetrates through the stepping piston cylinder and the annular piston and moves in the stepping piston cylinder and the annular piston; a return gas port and an advancement gas port are arranged on the stepping piston cylinder; retaining pins are arranged on the stepping piston cylinder and the annular piston; springs are arranged behind the retaining pins; four one-way retaining sliding grooves are evenly and circumferentially formed in the stepping piston shaft; the adjacent one-way retaining sliding grooves are arranged oppositely; arc-shaped sliding grooves are formed in two ends of a distribution range of the one-way retaining sliding grooves; and retaining steps are arranged at bottoms of the arc-shaped sliding grooves. The bidirectional stepping piston mainly solves the problem about mechanical stepping of the fluid power sources, has the advantages of capability of realizing accurate stepping control and automatic opposite movement, simple structure, small size, large thrust, low cost, low technical difficulty, good stability and durability, good practicability and the like, can also be deemed as a stepping jack, has a very large application room in the field of mechanical control, and is easy to popularize.

The invention discloses slicing equipment for magnetic material production, and relates to the technical field of machine manufacturing. The slicing equipment comprises a box body, a cutting frame, a motor, a transmission system, a feeding system and a fixing assembly, the cutting frame is fixedly installed on the upper surface of the box body and slidably connected with a cutting tool through a screw, and a driven wheel is fixed to the screw; and the motor is fixed to the side face of the box body and drives the driven wheel through a belt, an L-shaped plate is fixed below the motor, a transmission system is installed on the L-shaped plate and comprises a threaded sleeve and a hydraulic column, one end of the hydraulic column is connected with a feeding system through a rack, and a fixing assembly is arranged on the feeding system. The slicing equipment has the beneficial effects that the feeding system can be driven to move through the transmission system while the motor drives a cutting tool to move, automatic feeding can be achieved, a fixing device is arranged, it can be guaranteed that deviation does not occur in the slicing process, the lifting height of the feeding system can be adjusted by changing the capacity of hydraulic oil in a hydraulic column, and therefore the cutting thickness is changed.

The invention discloses a medical neurosurgery postoperative rehabilitation and recovery nursing device, relating to the technical field of neurosurgery. The invention particularly relates to a medical neurosurgical postoperative rehabilitation nursing device. The device comprises a frame and a leg exercising mechanism, height position adjusting mechanisms are installed at the two ends of the front end and the rear end of the frame respectively, a traditional Chinese medicine fumigation box is arranged in the frame, a transverse plate is installed above the traditional Chinese medicine fumigation box, a lying plate is installed above the transverse plate, and a backrest angle adjusting mechanism is installed on one side of the lying plate. The medical neurosurgery postoperative rehabilitation and recovery nursing device is provided with the height position adjusting mechanisms, a guide lead screw motor can effectively push a lead screw guide sleeve column to move in the direction of the vertical center line of the frame through a guide lead screw, the screw rod guide sleeve column and the transverse plate can move synchronously, the moving distance of the transverse plate can be effectively changed, and therefore the height of the transverse plate can be effectively adjusted, and the position of the transverse plate can be flexibly adjusted.

The invention relates to the field of silicon steel sheet lamination, in particular to automatic lamination equipment for silicon steel sheets. The equipment comprises a sliding frame, a mounting seat and a plurality of single-layer disc machines, and each single-layer disc machine comprises a stacking frame, a transverse pulling mechanism, a pressing mechanism, two synchronous pulling mechanisms, a double-layer synchronous pressing mechanism, a transmission connector, a second elastic mounting seat, three first elastic mounting seats and five electromagnets. The double-layer synchronous pressing mechanism can be automatically separated from the transmission connector through a transmission plate, a driving source is prevented from being used for separation, and the equipment cost is reduced. The transmission pipe is driven by the transmission connector to move, the driving source is reduced, and the equipment cost is reduced. The transmission pipe is driven to descend when the transmission connector descends, a middle silicon steel sheet, two longitudinal silicon steel sheets and a transverse silicon steel sheet descend at the same time, the observation time of workers is prolonged, and the risk of silicon steel sheet deviation is reduced.

The application discloses a novel pressure maintaining valve, comprising: a valve body, an air inlet and an air outlet are formed on the valve body, and a gas cylinder release channel is formed in the valve body; a valve assembly is arranged in the valve body, and the valve assembly includes a valve stem and the piston, the piston is provided with a through groove, and the bottom end of the piston is provided with a sealing gasket; the screw sleeve is threadedly connected to the valve body, the screw sleeve passes through the through groove and is opposite to the air outlet, and the screw sleeve is provided with a bushing, a guide sleeve and a first spring, the guide sleeve is provided with a sealing ring, the first spring is pressed against the guide sleeve, the bushing covers the guide sleeve, and the guide sleeve is provided with a guide opening, and the guide opening adjusts the moving position through the movement of the sleeve; and The limiting part is arranged at the air outlet of the valve body, the bottom of the piston is provided with a plurality of support arms, and the limiting part can force the support arms to press against the bottom of the piston. The application can ensure the tightness of the pressure-holding valve after long-term use, improve the gas tightness in the pressure-holding valve during installation, and can flexibly adjust the gas outflow rate when the gas is released, so as to flexibly adapt to various application scenarios .

The invention discloses a pilot valve, which comprises a valve main body, coils, a control box, a magnet, a pushing rod, a moving rod and a movable plug, wherein the valve main body is internally provided with a placing cavity, coil placing cavities are arranged around the placing cavity, the coils are installed in the coil placing cavities, the coils are electrically connected with the control box through a conductive wire, the right side in the placing cavity is provided with a fixing base, the fixing base is fixed in the placing cavity by a connecting block, the pushing rod is installed onthe fixing base, the left end of the pushing rod is provided with the magnet, the right end of the pushing rod is provided with the pushing block, a communicating cavity is arranged at the right sideof the placing cavity, the moving rod is installed in the communicating cavity, and a movable block is installed at the left end of the moving rod. Through arranging the valve main body, the coils, the control box, the magnet, the pushing rod, the moving rod and the movable plug, the problems of complex structure, inconvenient use, and inconvenient adjustment of flows between pipelines during theusing process are solved.

The invention discloses an anti-hanging partition wall of a super high-rise building and a construction method thereof, and relates to the technical field of an anti-hanging partition wall of a super high-rise building, in particular to an anti-hanging partition wall of a super high-rise building, which includes a bottom groove plate and a chute. The left and right sides of the inside of the bottom trough are equipped with position adjustment mechanisms, and a limit clamping mechanism is installed above the bottom trough, and a spine keel is installed above the limit clamp, and the spine keel The middle part is connected with a double-ended threaded rod, and the front and rear ends of the double-ended threaded rod are connected with fixing nuts. The anti-hanging partition wall of the super high-rise building is equipped with a position adjustment mechanism. The hand wheel lever pushes the wheel frame to move along the vertical centerline of the column frame until the roller is pushed out of the column frame, and the bottom groove plate is adjusted to a suitable height. , the rollers can provide auxiliary movement for the anti-hanging partition wall, can effectively improve the flexibility of the anti-hanging partition wall movement, and can adjust the anti-hanging partition wall to a suitable position.

The invention discloses a large stroke actuator based on electromagnetic drive, and belongs to the technical field of actuator. An electromagnetic driver, sliding blocks and stroke amplification unitsare arranged for cooperation; the electromagnetic driver drives the sliding blocks to move, and movement of the sliding blocks is transformed into relative rotation of two connecting rods of each stroke amplification units; and sliding stroke of the sliding blocks is amplified by at least one stroke amplification unit to be transmitted to a plug-pull piece at one end of the actuator to complete the plug / pull process of the plug-pull piece. The large stroke actuator based on electromagnetic drive is simple in structure and convenient to arrange; the sliding movement of the sliding blocks is effectively amplified by the stroke amplification units; control is simple in the whole process, and controlling accuracy is high; and actuator stroke driving distance changing is effectively achieved by changing the number of the stroke amplification units and / or sliding distance of the sliding blocks, and therefore compatibility of the actuator is greatly improved, large stroke control of the actuator is achieved and excellent popularization and application value is achieved.

The invention belongs to the technical field of mechanical stepping control on fluid power sources and particularly relates to an automatic reversing type bidirectional stepping piston. The automatic reversing type bidirectional stepping piston comprises a stepping piston cylinder, an annular piston and a stepping piston shaft, wherein the annular piston is sleeved with the stepping piston cylinder and moves in the middle of the stepping piston cylinder; the stepping piston shaft penetrates through the stepping piston cylinder and the annular piston and moves in the stepping piston cylinder and the annular piston; a return gas port and an advancement gas port are arranged on the stepping piston cylinder; retaining pins are arranged on the stepping piston cylinder and the annular piston; springs are arranged behind the retaining pins; four one-way retaining sliding grooves are evenly and circumferentially formed in the stepping piston shaft; the adjacent one-way retaining sliding grooves are arranged oppositely; arc-shaped sliding grooves are formed in two ends of a distribution range of the one-way retaining sliding grooves; and retaining steps are arranged at bottoms of the arc-shaped sliding grooves. The bidirectional stepping piston mainly solves the problem about mechanical stepping of the fluid power sources, has the advantages of capability of realizing accurate stepping control and automatic opposite movement, simple structure, small size, large thrust, low cost, low technical difficulty, good stability and durability, good practicability and the like, can also be deemed as a stepping jack, has a very large application room in the field of mechanical control, and is easy to popularize.

The invention provides a process for preparing tea polyphenol. The process comprises the following steps: (1) pretreating tea leaves: picking fresh tea leaves for spreading and airing, then carrying out enzyme deactivation on the tea leaves under microwaves by utilizing enzyme deactivation crushing equipment until the water content is 70-75%, and then crushing the standby tea leaves in a crusher to prepare tea powder for later use; (2) wall breaking: mixing the tea powder for later use with a citric acid aqueous solution according to the ratio of 1 kg of tea powder to (20-40) L, firstly performing microwave extraction, and then adding wood fiber hydrolase superfine powder for enzymolysis; then adding pectinase superfine powder and xylanase superfine powder for enzymolysis, and then performing boiling; and (3) extraction: extracting the enzymatic hydrolysate obtained in the step (2) for 10-15 minutes at the pressure of 0.5-0.8 MPa and the temperature of 90-100 DEG C in a reaction kettle, then performing extraction for 5-8 minutes at the ultrasonic power of 80-100 W, performing filtration to remove residues, centrifuging the filtrate, and collecting the supernate. The preparation process is simple, and the crusher provided by the invention can integrate fixation and crushing, and is automatic in operation and convenient and fast to use.

The invention relates to an annular cylinder rotor engine which consists of a rotor and a stator, wherein the space between the rotor and the stator is an annular combustion chamber; the rotor is provided with 8 pistons which are divided into two groups and do gradual trade off rotations in the annular combustion chamber; the annular combustion chamber is divided into 8 cylinders by the pistons; during running, when one group of pistons go forward, the other group of pistons stand still to ensure that the volume of one group of cylinders in the annular combustion chamber is reduced, while thevolume of the other group of cylinders is increased, and the volumes of the two groups of cylinders change so as to realize 4 strokes; in the 8 cylinders, the strokes of every two opposite cylinders are the same; and expansive force is transmitted to a gear crankshaft through a connecting component in the rotor and then transmitted to an output shaft through the gear crankshaft so as to ensure that the output shaft continuously rotates.

The invention belongs to the field of medical apparatuses and instruments and particularly relates to a flexible knee-joint rehabilitation assisting device. The flexible knee-joint rehabilitation assisting device comprises a base plate, wherein a semi-circular ring is fixedly connected to the upper surface of the base plate, a connecting block is fixedly connected to the upper surface of the baseplate, a first cavity is formed in the connecting block, a piston is slidingly connected to the inner wall of a first cavity, a second cavity is formed in the piston, a limiting mechanism is slidinglyconnected to the inner wall of the second cavity, a connecting rod is fixedly connected to the upper surface of the piston, the top of the connecting rod penetrates through the top of the first cavity and is rotatably connected with a rotary rod through a first rolling bearing, a slide block is fixedly connected to the rod wall of the rotary rod, a connecting plate is slidingly connected to the side wall of the slide block, the side wall of the connecting plate is provided with a slide groove matched with the slide block, a first arc-shaped block is hinged to the top of the connecting plate,and the side wall of the first arc-shaped block is fixedly connected with an arc-shaped plate. The flexible knee-joint rehabilitation assisting device is smaller in size and convenient to use and improves the rehabilitation effect of a patient, and the safety and practicability of the flexible knee-joint rehabilitation assisting device are also improved.

A machining device for a female hinge of a three-wing hinge comprises a worktable. A female hinge guiding rail for placing a female hinge sectional material is arranged on the worktable. An auxiliary clamping device, a conveyor, a groove cutting machine, a punching machine, a drilling machine and a cutting machine which are connected with a controller correspondingly are arranged on the worktable in the advancing direction of the female hinge sectional material in sequence. The auxiliary clamping device and the conveyor are sequentially arranged in the position, at the front end of the female hinge guiding rail, of the worktable. The groove cutting device is arranged in the position, close to the conveyor, of the worktable and located on one side of the female hinge guiding rail. The punching machine and the drilling machine are sequentially arranged on the upper position, close to the groove cutting machine, of the female hinge guiding rail. The cutting machine is arranged in the position, close to the drilling machine, of the worktable and located on one side of the female hinge guiding rail. The machining device has the advantages of high mechanization degree, high production efficiency and high machining precision and the like.

The invention provides a centrifugal automatic control type variable exhaust valve structure. The centrifugal automatic control type variable exhaust valve structure comprises an exhaust port of an air cylinder, and the exhaust port can be closed and opened by an exhaust valve; the exhaust valve is connected with a control rod, and the diameter of the exhaust port sealed by the exhaust valve can be changed by rotating the control rod; the outer side of the air cylinder is provided with a cavity for storing a centrifugal adjuster; the centrifugal adjuster comprises a centrifugal derivation partand a combining pushing part; the centrifugal derivation part can change the transmission direction of the combining pushing part and is in linkage with an engine; and the combining pushing part is connected with the control rod and controls the control rod to rotate forwards and reversely according to the position of the centrifugal derivation part. According to the centrifugal automatic controltype variable exhaust valve structure, the small-size mechanical structure is adopted to automatically control and correspond to the position of the exhaust valve, pull rods are linearly controlled to rotate the angle of the exhaust valve, thus, the exhaust port is closed or opened, and the compression ratio and the engine performance are improved.

The invention discloses an irrigation device capable of controlling the irrigation water amount and used for a water conservancy project. The irrigation device comprises a base, a water tank, a steering gear, two front side wheels, two irrigation mechanisms, a driving mechanism and a quantifying mechanism, wherein the water tank is embedded and mounted in the middle position of the base; the steering gear is arranged on the front side of the top end of the base; the two front side wheels are rotationally mounted at the left end and the right end of the bottom of the steering gear respectively; the two irrigation mechanisms are arranged at the rear ends of the left side and the right side of the base correspondingly; the driving mechanism is arranged at the right end of an inner cavity in the rear side of the base; and the quantifying mechanism is arranged at the left end of the inner cavity in the rear side of the base. The irrigation device capable of controlling the irrigation water amount and used for the water conservancy project is convenient to move, does not need to be dragged manually, saves time and labor, is large in irrigation radiation area, uniform in sprinkling irrigation and extremely high in irrigation efficiency, and moreover, the irrigation device facilitates control for the irrigation water amount per unit area, is simple to operate and reliable in structure, can adjust the irrigation water amount per unit area according to different crops and is suitable for modern farms.

The invention provides a miniature guiding rail for a large-scale printer. The miniature guiding rail comprises an arc-shaped plate, a sliding plate, a sliding groove, a base, lug bosses, a plastic holding frame, heat-dissipating through holes, a plurality of steel balls, a supporting rod, a sliding rail, a groove, an insertion pile, a sliding block, a limiting block, a flange bearing, an insertion block, a gear rack, a gear, a rotating shaft, a bearing, a rotating plate and screws, wherein the sliding groove is formed in the base; inward-concave first concave strips are correspondingly arranged on the left and right side walls of the interior of the sliding groove; the plastic holding frame is arranged in the sliding groove; the lug bosses are correspondingly mounted on the left and right sides of the bottom of the plastic holding frame, and positioned on the sliding groove; the lower bottom surfaces of the lug bosses cling to but are not fixedly connected with the upper bottom surface of the sliding groove; the steel balls are correspondingly mounted on the left and right sides of the plastic holding frame; and the sides, close to the base, of the steel balls are embedded in the first concave strips in the base. The miniature guiding rail provided by the invention has the advantage that the moving distance of the sliding plate can be changed.

The invention relates to the technical field of medical treatment, and discloses a self-testing bracelet for uremia hemodialysis internal fistula. The self-testing bracelet comprises wrist straps, wherein a fixing plate is movably connected between the wrist straps and supports a display panel, and the display panel is movably connected to the surface of the fixing plate. Through cooperative use of a massage block, a limiting plate and a first connecting rod, the massage block is capable of massaging the acupuncture points of the arm, so that the bracelet is more comfortable to use; the movingdistance of the massage block can be changed, the massage degree is changed, and automatic adjustment can be conducted according to different requirements; through cooperative use of the display panel, a pointer, a first gear and a second gear, a blood transfusion tube can be displayed when deviating in the dialysis process, observation can be conducted visually, and medical staff can be remindedto conduct treatment; and through cooperative use of a movable polar plate and a fixed polar plate, an alarm cannot be triggered when the blood transfusion tube moves within a controllable range, andan alarm prompt can be triggered when the maximum deviation is reached.