69results about How to "Reduced risk of getting stuck" patented technology

The invention discloses a picking cart for prickly pear. The cart comprises a mobile mechanism, a cutting mechanism, a tightening mechanism, a conveying mechanism, a thorn removal mechanism, a screening mechanism, a supporting mechanism and a key module. The supporting mechanism is arranged on the mobile mechanism, the screening mechanism is arranged on the mobile mechanism, and the thorn removalmechanism is arranged on the screening mechanism; the cutting mechanism is arranged on the supporting mechanism, the conveying mechanism is arranged on the cutting mechanism and the mobile mechanism,the tightening mechanism is arranged on the cutting mechanism, and the key module is arranged on the supporting mechanism and the tightening mechanism. The invention belongs to the technical field ofagricultural machinery and particularly provides the picking cart for the prickly pear. The picking cart for the prickly pear is easy to operate, convenient to move, high in safety and picking efficiency and capable of cutting the prickly pear without damage, guaranteeing that the prickly pear without damage is conveyed to a loading box and achieving real-time thorn removal and screening.

The invention discloses an expansion pipe which comprises a pressure pipe column, an expansion pipe body, a combined reducing expansion cone, a hydraulic cylinder and a bull nose, wherein the pressure pipe column is provided with an oil pipe, a connecting pipe and a center pipe which are sequentially connected; the oil pipe is sleeved with the expansion pipe body; the combined reducing expansion cone is positioned at the lower end of the expansion pipe body; the center pipe is sleeved with the combined reducing expansion cone; the hydraulic cylinder is positioned at the lower end of the combined reducing expansion cone; a plurality of pressurizing devices which are connected in series are arranged in the hydraulic cylinder; the lower ends of the pressurizing devices are connected with a ball valve seat; and the bull nose is connected to the lower end of the hydraulic cylinder. According to the expansion pipe disclosed by the invention, the combined reducing expansion cone is arranged outside the expansion pipe body of the expansion pipe, so that the diameter of the pipe column is minimized in the process that the pipe column extends into a barefoot well, and the risk that the pipe column is blocked in the extending process is reduced; and moreover, the reducing expansion can be implemented by the combined reducing expansion cone, the expansion ratio of the expansion pipe can be maximized, the expansion pipe blocks off a layer section of a troublesome stratum of the barefoot well after being expanded, and the effect of no loss of the size of a borehole can be implemented.

A lift belt (12) for a lift installation comprises a belt body (15) in which a tensile carrier arrangement (14) with several tensile carriers (14.1, 14.2) for transmission of a tension force in longitudinal direction of the lift belt is arranged. A profile body (16) which spaces these tensile carriers from one another is arranged between adjacent tensile carriers (14.1, 14.2) of the tensile carrier arrangement (14). <SDOCL LA=EN> 12 Claims 1. Lift belt (12) for a lift installation, with a belt body (15) in which a tensile carrier arrangement (14) with several tensile carriers (14.1, 14.2) in the form of strands or cables for transmission of a tension force in longitudinal direction of the lift be lt is arranged, characterised in that a profile body (16) is arranged between adjacent tensi le carriers (14.1, 14.2) of the tensile carrier arrangement (14) and spaces these tensil e carriers from one another. 2. Lift belt according to claim 1, characterised in that a respective profil e body (16) is arranged between several, preferably between all, tensile carriers of the tensile carrier arrangement (14). 3. Lift belt according to claim 2, characterised in that all profile bodies (16) have the same cross-sectional shape. 4. Lift belt according to claim 2, characterised in that at least two profil e bodies (16) have different cross-sectional shapes. 5. Lift belt according to any one of the preceding claims, characterised in that a profile body has a substantially circular, oval (16.1), T-shaped, double-T-shaped (16.3), U- shaped, triangular or quadrangular (16.2) cross-section. 6. Lift belt according to any one of the preceding claims, characterised in that a profile body extends in longitudinal direction ofthe lift belt (12), particularly substantially over the entire lengthof the lift belt. 7.

The invention discloses a jet dredging pipe cleaner which comprises a pipe cleaner body (1) with the outline in a cylinder shape, an annular pipe cleaner scraping plate (2) is arranged on the periphery of the pipe cleaner body (1), a fluid channel (3) penetrates the pipe cleaner body (1), a jet port (4) is formed in the fluid channel (3) at the position of the tail end of the pipe cleaner body (1), a pressure control valve (5) for controlling on-off of the fluid channel (3) is arranged on the pipe cleaner body (1), is opened when the head end fluid pressure of the pipe cleaner body (1) is higher than a preset value and is closed when the head end fluid pressure of the pipe cleaner body (1) is lower than the preset value. By using the jet dredging pipe cleaner to conduct pipe cleaning operation, risks of subsea pipe blocking in subsea pipe cleaning operation are greatly reduced, and subsea pipe blocking removing cost and blocking removing uncertainties are reduced. The pipe cleaner is simple, easy to operate and practical.

The invention relates to a layering water injection flow intelligent adjusting system under a pit. The layering water injection flow intelligent adjusting system under the pit comprises a PLC controlunit, an upper joint, a cone-hole flow passage converting pipe, a power generation unit, an intelligent water dispenser and a lower joint, wherein the upper joint, the cone-hole flow passage converting pipe, the power generation unit, the intelligent water dispenser and the lower joint are successively connected from top to bottom, two deflected holes are formed in both sides of the cone-hole flowpassage converter pipe, and an upper round taper hole is located between the two deflected holes; the tail end of the upper round taper hole is communicated with a power generation branch and a waterinjection branch, an electromagnetic valve is installed on the cone-hole flow passage converter pipe, and the tail end of the power generation branch is connected with a lower round taper hole; the lower round taper hole is communicated with the power generation unit, and an impeller power generator under the pit is arranged in the power generation unit; the lower end of the power generation unitand the water injection branch are connected with the intelligent water dispenser, a water dispensing cavity of the intelligent water dispenser is communicated with a water outlet cavity through an adjustable water nozzle, a platinum thermistor thermometer, a lever flowmeter and a silicon piezoresistive pressure meter are arranged in the water outlet cavity, and the adjustable water nozzle is connected with a gear motor. Repeated throwing and catching operations are not needed, and the water injection amount can be adjusted in real time.

The invention provides a cutter edge modification method for processing the helicoid of a screw rotor. The method has the following beneficial effects: the equidistant tooth surfaces of tooth surfaces of a theoretical rotor processed by a grinding wheel or a cutter are obtained through analysis and computation; the equidistant tooth surfaces are not equal in normal gaps of lines of contact; profile gaps are not equal on the end face of the theoretical rotor and the end face of a practical rotor, namely, when the meshing point is farther from the rotor axis, the profile gaps can be enlarged asthe helical angle is enlarged; and such gap distribution ensures that the tooth surfaces of the rotor are insensitive to change of the side gaps of a synchronous rotor or gear, thus reducing the danger that tooth surfaces of the rotor are stuck and being very beneficial to safe operation of machinery.

The invention relates to an intelligent injection allocation device of an integrated electromagnetic flowmeter. The intelligent injection allocation device comprises an upper connector, a housing and a lower connector which are sequentially connected from top to bottom, wherein a central controller is installed in the middle of an annulus cavity of the housing, the electromagnetic flowmeter is installed in the annulus cavity of the upper portion of the central controller, a communicating module and a pin body are installed in the annulus cavity of the upper portion of the electromagnetic flowmeter, a flow adjusting device and an inner pressure sensor are installed in the annulus cavity of the lower portion of the central controller, the central controller is electrically connected with the pin body, the communicating module, the electromagnetic flowmeter, the flow adjusting device and the inner pressure sensor, and the pin body and the communicating module are connected to a ground controller through cables. The intelligent injection allocation device transmits data and performs power supply through cables and can automatically adjust layered water injection amount, and the problems of low layered water injection pass percent, large manual operating amount and unachieved underground real-time monitoring are solved.

The invention provides an expansion pipe completing tool. The expansion pipe completing tool comprises an expansion pipe, a central pipe, a first level hydraulic cylinder and a first level expansion cone; the lower end of the expansion pipe is connected with a float shoe; the central pipe is arranged inside the expansion pipe in a penetration mode; the lower end of the central pipe is sequentially connected with an expansion cone locking splitting claw and an expansion cone locking mandrill; the upper end of the central pipe is provided with a first penetration hole; the first level hydraulic cylinder is sleeved to the central pipe position which is provided with the first penetration hole; the first level expansion cone which is sleeved to the central pipe is arranged at the lower end of the first level hydraulic cylinder; the lower end of the first level expansion cone is provided with a reducing expansion cone which is sleeved to the central pipe. According to the expansion pipe completing tool, the reducing expansion cone which is in a combined type reducing structure enables the diameter of a pipe column to be minimum and lowering resistance risks to be reduced when the pipe column lowers to an open hole well, the reducing cone can provide a large expansion rate after being assembled, and the well hole size is not loosed or loosed as little as possible during expansion pipe completing.

The invention discloses a jam releasing device and method for a hydraulic fracturing packer of an underground long drill hole in a coal mine. The jam releasing device comprises a valve body, a plunger ball seat, a low-density ball, a lower connector and a spring, wherein one end of the lower connector is connected with the valve body, the other end of the lower connector is connected with a packer, a plurality of water outlets are formed in the positions, which correspond to the plunger ball seat, of the valve body, the plurality of water outlets are distributed around the valve body and are arranged towards the bottom of the hole, and a certain included angle is formed between the water outlets and the central axis of the valve body; and the spring is located in a cavity where the valve body and the lower connector are connected, one end of the spring is abutted with the plunger ball seat, and the other end of the spring is abutted with the lower connector. According to the jam releasing device, the technical problem that the in-hole fracturing packer cannot retreat smoothly when encountering resistance is solved, the device has the advantages of simplicity, convenience in operation and high jam releasing success rate, the risk of encountering resistance of the hydraulic fracturing packer of the long drill hole can be effectively reduced, the hydraulic construction efficiency is improved, and the fracturing engineering loss is reduced.

The invention relates to a safety syringe. The safety syringe comprises a needle cylinder, a push rod and a needle tool. The push rod can pass through the needle cylinder in a movable manner; the needle tool can sleeve in the front end of the needle cylinder in a detachable manner; one end of the push rod is provided with an elastic body and a push column protruded out of the elastic body; when the front end of the push rod moves toward the needle tool, the elastic body is pressed to be elastically deformed and is abutted against the needle cylinder, so that the push column passes through the needle cylinder and pushes the needle tool in order to make the needle to seperate from the needle cylinder.

The invention provides a cable digital layering injection ground control system. The system comprises an oil pipe and a cable digital water distributor connected to the oil pipe. The cable digital water distributor is electrically connected to a ground controller on the ground through a cable. The ground controller is electrically connected to a host computer. The cable digital layering injection ground control system can automatically adjust injection volumes for all layers, can monitor and store downhole pressure, temperature and flow parameters in a real-time manner, and can automatically perform downhole sealing examination. The ground controller is connected to the cable digital water distributor through the cable, and two-way transmission between data and instructions is carried out through the cable, so that the data can be directly read and can be controlled in a real-time manner, and a cable communication process is stable and reliable. During a testing and allocating process, a testing and allocating instrument is not required to be butt jointed with the water distributor, water volumes are automatically adjusted directly through a ground control downhole flow control system, and blocking and clamping risks during a construction process are reduced.

The invention relates to a container closure for a container (1) having an accommodating space (6) for accommodating contents, wherein the container closure has a container-side portion (3), in which a dispensing opening (16) for the contents is formed, wherein the container closure has a lid portion (4), which is intended for closing the dispensing opening (16) and is connected to the container-side portion (3) via a hinge (5), a childproof lock (7) being provided. The invention is characterized in that the container-side portion (3) forms a chamber (12), which is separate from the accommodating space (6), and in that the childproof lock (7) is arranged in the chamber (12) at least in a closed position of the lid portion (4).

The invention particularly relates to a grillwork for a pressurized water reactor fuel assembly, and belongs to the field of pressurized water reactor fuel assemblies. The grillwork comprises outer strips and inner strips, and a plurality of inner strips are arranged inside a plurality of outer strips in a wrapping manner and are mutually staggered, wherein a plurality of bosses which are distributed in two rows at equal intervals are arranged on the surface of the inner side of the outer strips and the thickness of the plate on the outer strips at the joint of the bosses and the outer stripsis set to be thickened so that the thickness of the plate on the outer strips at the joint of the bosses and the outer strips is set to be thickened, the strength and the rigidity of the outer stripsat the bosses are improved in a basic mode of adding materials, cracks and deformation caused by excessive load can be effectively avoided and the reliability is higher; the process is simple and themachining efficiency is high.

The invention discloses a self-adaptive casing centralizer and a righting method. The self-adaptive casing centralizer comprises a body. A plurality of self-adaptive expansion assemblies capable of being automatically expanded by pressure to automatically adapt to the diameter of a well to right and fix a casing are arranged on the body. Each self-adaptive expansion assembly comprises a bellows arranged in a stepped through-hole slot. The cross section of each bellows is in a wavy shape. The self-adaptive casing centralizer is simple in whole structure and convenient to operate and can adapt to different well diameters, the casing is effectively righted and fixed, and the well cementing quality is improved; the overall outer diameter of the body of the self-adaptive casing centralizer is smaller than the well diameter of a wellbore when the body of the self-adaptive casing centralizer is in an initial state, the centralizer can smoothly enter the well, the risk of encountering resistance is reduced, the well wall is not damaged, the bellows can uniformly expand, the supporting force is improved, the casing is effectively righted, and the centering degree of a casing column is increased; and after centering of the casing is completed, the wellbore annular clearance is uniform, the well cementing quality can be effectively improved, and the whole construction is easy and convenient.

The invention discloses a fast-dissolvable vitamin C and zinc preparation and a preparation method thereof. The fast-dissolvable vitamin C and zinc preparation is prepared from, by weight, 0.5%-2% of zinc oxide particles, 0.2%-0.6% of zinc gluconate, 3%-10% of vitamin C particles, 5%-10% of microcrystalline cellulose, 65%-85% of D-mannitol, 0.5%-1% of edible essence, 5%-8% of cross-linked polyvinylpyrrolidone, 0.05%-0.15% of sucralose and 0.5%-1% of magnesium stearate. The fast-dissolvable vitamin C and zinc preparation has advantages of reduction of irritation to digestive tract mucosa, convenience in administration, quickness in absorption, high bioavailability, reduction of risks in use and quickness in replenishment of essential vitamin C and zinc to human bodies.

The invention relates to a gearwheel arrangement (1) with a main gearwheel (2) and a gearwheel (4) rotatable relative to the latter in circumferential direction (3), wherein the main gearwheel (2) comprises a hub (5) on which the rotatable gearwheel (4) is arranged, and with a spring element (7), which is arranged between the main gearwheel (2) and the rotatable gearwheel (4), and by means of which the rotatable gearwheel (4) is pretensioned in circumferential direction (3) against the main gearwheel (2), wherein the main gearwheel (2) comprises at least one first support element (22) and the rotatable gearwheel (4) comprises at least one second support element (23), and wherein the spring element (7) is arranged between the first and the second support element (22, 23) and thereby spaced apart from the first surface (19) of the main gearwheel (2) and from the second surface (21) of the rotatable gearwheel (4).

The invention relates to an apparatus for cleaning gutters comprising a main body (2) with a handling portion (2.3) and two arm portions (2a, 2b) laterally protruding from said handling portion (2.3),wherein a first cleaning portion (2.1) is provided at a first arm portion (2a) and a second cleaning portion (2.2) is provided at a second arm portion (2b). The apparatus (1) further comprises liquidguiding means (10), said liquid guiding means (10) being adapted to selectively guide liquid towards the first or the second cleaning portion (2.1, 2.2).