1148 results about "Single tube" patented technology

The invention belongs to the technical field of coating equipment, particularly relates to a chamber gas inlet pipeline and gas flow uniformizing structure of PECVD (Plasma Enhanced Chemical Vapor Deposition) equipment, and aims to solve the problems that the dispersion concentration of dissociated chamber gas of the existing PECVD equipment is non-uniform, the gas concentration close to the inlet end of a gas pipeline exceeds that of other areas, and the gas flow uniformizing structure is not uniform. In order to solve the problems that the plasma concentration is too high in the part of film forming process, the phenomenon that particulate matter is gathered on half and exceeds the standard is caused, and meanwhile the uniformity of final film forming becomes poor due to the fact that the plasma concentration is inconsistent in the film forming process, the following scheme is provided that an air inlet cavity is included. The chamber gas inlet pipeline and the gas flow uniformizing structure of the PECVD equipment disclosed by the invention can assist the gas flow uniformizing plate I and the gas flow uniformizing plate II in diffusing gas introduced from the center above the chamber to the periphery; the risk that particulate matter exceeds the standard due to uneven concentration dispersion of single-pipeline gas inlet is avoided through secondary flow uniformizing of the first gas flow uniformizing plate and the second gas flow uniformizing plate, and the added secondary flow uniformizing can further improve the uniformity of the membrane.

The utility model relates to the technical field of pipe cutting devices, in particular to an automatic cutting device for a three-way pipe fitting. According to the technical scheme, the device comprises a base, a sliding table is slidably mounted at the top of the base, a single-pipe-head clamping plate is fixedly mounted at the top end of the sliding table, a protective baffle is fixedly mounted on the side, away from the sliding table, of the top of the base, a transverse moving frame plate is slidably mounted at the top end of the sliding table, and a first rubber column head is clamped and inserted into the transverse moving frame plate; a double-pipe-head clamping assembly is fixedly installed at the top end of the base, two clamping plates are arranged on the double-pipe-head clamping assembly, and second rubber column heads are fixedly installed on the inner side walls of the clamping plates. By means of the single-pipe-head clamping plate and the double-pipe-head clamping assembly, any port of the three-way pipe can be clamped and fixed, the pipe positioning difficulty is reduced, the rubber column heads support the inner walls of the pipe heads, the deformation probability during pipe cutting can be reduced, cutting is convenient, and the production efficiency is effectively improved.

The utility model discloses a well group type jet pump same-well production, injection, drainage and gas production system which comprises a gas-liquid mixture outlet manifold, a gas-liquid separator, a power liquid sedimentation system, a ground power system, a power liquid injection manifold, a reinjection liquid manifold, a wellhead gas collection system and a plurality of single-pipe jet pump same-well production and injection systems, the multiple single-pipe jet pump same-well production and injection systems are arranged in parallel and connected with the gas-liquid separator through the gas-liquid mixture outlet manifold. An outlet of the gas-liquid separator is provided with a gas phase outlet and a liquid phase outlet; a gas phase outlet of the gas-liquid separator is connected with a wellhead gas collection system; a liquid phase outlet of the gas-liquid separator is connected with a power liquid sedimentation system, the power liquid sedimentation system is connected with a ground power system, and the ground power system is connected with a plurality of single-pipe jet pump same-well production and injection systems through a power liquid injection manifold and a reinjection liquid manifold respectively; and a liquid phase outlet of the gas-liquid separator is connected with an external conveying pipeline.

An internal floating piston (IFP) having circumferential seal groove 2 on its external surface between two walls 3, 4 of the external surface, and an anti-tipping feature 8 increasing a length of said

The invention relates to the technical field of screw conveyors, in particular to an end shaft hole dynamic sealing structure of a chemical single-pipe screw conveyor. Comprising a conveying shaft rotationally connected to a rack; the flange is connected with the end cover, a through hole is formed in the middle shaft, the conveying shaft is in clearance fit with the through hole, the inner side face of the flange is coaxially connected with an end cover leakage-proof ring, and the end cover leakage-proof ring is in clearance fit with the conveying shaft. The annular limiting seat is coaxially connected to the outer side of the flange connecting end cover; the packing body is arranged between the annular limiting seat and the conveying shaft; the inner wall of the packing pressing ring is in clearance fit with the conveying shaft, the packing pressing ring comprises a flange connecting part and a pressing part, the flange connecting part is adjustably connected to the annular limiting seat through a connecting piece, and the pressing part abuts against the outer end of the packing body. According to the end shaft hole dynamic sealing structure of the spiral conveyor, the acting force of the spiral blade for pushing materials can be eliminated, the materials are prevented from being extruded into a gap between the packing and the spiral shaft, and the sealing performance is good.

The invention relates to the technical field of pipeline sealing, in particular to a single-pipe double-blocking sealing device which comprises a pipeline cover, a screw, a first sliding sealing assembly, a second sliding sealing assembly and a rope wheel assembly. The screw rod is arranged in the center of the pipeline, the part, extending into the pipeline, of the screw rod is movably sleeved with the first sliding sealing assembly, and the first sliding sealing assembly is driven to move to seal the inner side of the pipeline and the pipeline cover; the portion, extending out of the pipeline, of the screw is movably sleeved with a pipeline cover and a rope wheel assembly, a second sliding sealing assembly is arranged on the guide rail outside the pipeline, and the rope wheel assembly drives the second sliding sealing assembly to move to seal the portion between the outer side of the pipeline and the pipeline cover. The problem of internal and external sealing of the pipeline is solved.

The invention relates to the technical field of ship roll-on and roll-off equipment, and discloses ship single tubular pile ship loading roll-on and roll-off equipment which comprises single tubular piles and roll-on and roll-off units, the roll-on and roll-off units are distributed at the lower ends of the single tubular piles at equal intervals, and each roll-on and roll-off unit comprises a roll-on and roll-off vehicle body and a movable steel frame carrier. Three movable steel frame carriers are arranged at the upper end of each roll-on-roll-off vehicle body at equal intervals, a driving wheel set is arranged at the bottom of each roll-on-roll-off vehicle body, a plurality of connectors are evenly distributed on the upper end face of each roll-on-roll-off vehicle body, each movable steel frame carrier comprises a top seat and a bottom seat, the top seats are located above the bottom seats, and the bottom seats are located above the bottom seats. The top seat and the bottom seat are connected through an angle iron frame. According to the single-pipe-pile ship loading roll-on-roll-off equipment for the ship, a single pipe pile is placed on the top seats of the roll-on-roll-off units, the single pipe pile compresses the bulged buffering air bag cushion through gravity, the buffering air bag cushion is pressed to be flush with the curved groove, and the buffering air bag cushion has the buffering downward pressing acting force and protects a paint layer of the single pipe pile.

The invention discloses a single-pipe grouting annulus slurry replacement packer. The single-pipe grouting annulus slurry replacement packer is provided with a drill rod joint; one end of the drill rod joint is coupled with an inner pipe assembly; the inner pipe assembly is sequentially sleeved with a first outer pipe, a rubber sleeve short section and a second outer pipe in the axial direction. Through cooperation of the structures, the working processes of setting, grouting, annulus grout replacement and cement waiting and unsetting are achieved. According to the packer provided by the invention, local grouting in a hole is realized, so that the grouting amount and the grouting pressure can be effectively guaranteed; and drill holes except for the packer cannot be filled with grouting liquid in a coagulation waiting manner, through hole drilling is not needed, and a large amount of repeated footage is reduced.

The invention provides a Z-shaped prefabricated concrete wind power tower drum duct piece and a wind power tower drum. The concrete wind power tower drum duct piece comprises a duct piece lower layer and a duct piece upper layer. The transverse sections of the segment lower layer and the segment upper layer are concentric arcs with the same thickness and the same height and have an overlapped part, the thickness of the overlapped part is twice that of the segment lower layer or the segment upper layer, and the height of the overlapped part is 1 / 4-1 / 2 that of the segment lower layer or the segment upper layer; the overall height of the tower tube segment is 3-4 m. The wall thickness of a tower formed by the Z-shaped prefabricated concrete wind power tower tube segments is twice that of a tower formed by common arc-shaped segments, but the thickness of a single segment is not increased, and the bending resistance of the tower tube is improved while the Z-shaped prefabricated concrete wind power tower tube segments have the light characteristic. The inner layers of every two adjacent layers of annular units are nested in the outer layers, constraint is formed in the radial direction, the influence of pipe piece transverse splicing seams on the stability of the tower barrel is reduced, and the shear capacity of the tower barrel is improved.

The invention discloses a spiral adjustable vibration screening instrument and a screening optimization method thereof, and belongs to the technical field of soil screening. A vibration screening box comprises a vibration adjusting frame and a multi-layer spiral screening assembly; the vibration adjusting frame comprises a vibration tray, a screw rod, a central column and a fixing ring; the multi-layer spiral screening assembly comprises a single-pipe spiral flow guide channel and a multi-layer spiral screening ring which communicate with each other from top to bottom, the single-pipe spiral flow guide channel is arranged in the annular space and fixedly connected to the top of the center column, and the multi-layer spiral screening ring is connected to the center column in a penetrating and sleeving mode and connected to the screw. At least three layers of screening channels are arranged in the multi-layer spiral screening rings, the diameters of screening holes of the screening channels are sequentially reduced from top to bottom, a telescopic sleeve with the adjustable length is arranged between every two adjacent multi-layer spiral screening rings on the same screw, and an adjusting spring is arranged between every two adjacent screening channels. The screening instrument can adjust screening parameters in real time, so that the screening precision and the screening efficiency are improved, and the cost consumption is reduced.

The utility model discloses an implantable continuous in-vivo spacing tissue instrument which comprises an isolation balloon and a liquid filling hose, and the first end of the liquid filling hose is communicated with the isolation balloon; the liquid filling tail valve is connected with the second end of the liquid filling hose, the liquid filling tail valve is embedded under the skin of the patient, and a one-way valve for avoiding liquid leakage when the isolation balloon is filled is arranged in the liquid filling tail valve; the liquid filling tail valve and the liquid filling hose are each internally provided with a single pipe cavity used for filling the isolation balloon, or the liquid filling tail valve and the liquid filling hose are each internally provided with at least two pipe cavities arranged in parallel, and one pipe cavity is used for filling the isolation balloon. In addition, the liquid filling tail valve comprises a blocking structure with a blocking disc, and double-layer liquid leakage prevention protection is achieved. In order to facilitate liquid discharge after use, a release structure connected with the liquid filling tail valve is additionally arranged. By means of the arrangement, the effect that in-vivo interval tissue can be continued through one-time liquid filling of the isolation balloon can be well achieved.

The utility model discloses a double-switch double-water-outlet purified water faucet which comprises a faucet body, a water inlet connecting pipe, a plastic clamping sleeve, a sealing rubber ring, a connecting nut sleeve and a water guide pipe, the water inlet connecting pipe is communicated with the bottom end of the faucet body, and the outer surface of the water inlet connecting pipe is sleeved with the plastic clamping sleeve and the sealing rubber ring in an up-down opposite mode. The connecting nut sleeve is rotationally connected to the bottom end of the water inlet connecting pipe, the water guide pipe is communicated with the connecting nut sleeve, and the surface of the faucet body comprises a first purified water switch and a second purified water switch which are symmetrically arranged on the surface of the faucet body; the first purified water outlet hose and the second purified water outlet hose are located in the faucet body, the oneness of a traditional faucet can be changed, the single-pipe double-water-outlet effect can be achieved, the simple state is achieved, meanwhile, the faucet can be independently opened and closed, the water mixing phenomenon is avoided, and the installation space is saved.

The utility model discloses a soil vibration screening instrument, which belongs to the technical field of soil screening, and a vibration screening box comprises a vibration adjusting frame and a multi-layered spiral screening assembly, the vibration adjusting frame comprises a vibration tray, a screw rod, a central column and a fixing ring; the multi-layer spiral screening assembly comprises a single-pipe spiral flow guide channel and a multi-layer spiral screening ring which are communicated from top to bottom, the single-pipe spiral flow guide channel is arranged in the annular space and fixedly connected to the top of the center column, and the multi-layer spiral screening ring is connected to the center column in a penetrating and sleeving mode and connected to the screw. According to the screening instrument, screening parameters can be adjusted in real time, so that the screening precision and the screening efficiency are improved, and the cost consumption is reduced.

The invention provides a pipeline route design method based on a single-pipe mathematical model. The method comprises the following steps that a three-dimensional vertical section and a UCS coordinate system are determined according to a live-action three-dimensional model of a pipeline laying target area; establishing a single-tube mathematical model according to the three-dimensional longitudinal section and a UCS coordinate system; according to the single-pipe mathematical model, micro-piping laying is carried out on the pipeline; in the process of laying the micro-piping on the pipeline, calculating a direction similarity index according to the similarity between the pipeline shape and the pipe ditch shape; calculating a stress accumulation index according to the elastic modulus and the inertia moment; and constructing a total cost calculation model based on pipeline laying, and performing cost optimization based on the direction similarity index and the stress accumulation index so as to optimize the pipeline laying micro-piping. The method has the technical effects that the laying design precision and efficiency are remarkably improved, the cost is reduced, and the safety of the system can be enhanced.

The utility model discloses a parallel detachable concentric tube robot for minimally invasive surgery. The parallel detachable concentric tube robot comprises an abdominal sheathing canal, a plurality of single-arm driving systems and flexible instrument arms, the multiple single-arm driving systems are connected in parallel, the single-arm driving systems are connected with the flexible instrument arms, the multiple flexible instrument arms are arranged in instrument arm channels formed in the abdomen entering sheathing canal respectively, and each flexible instrument arm comprises a plurality of concentric tubes; the single-arm driving system comprises a single-tube driving module, a guiding device and a concentric tube are arranged in the single-tube driving module, a driving mechanism, a linear transmission mechanism and a rotary transmission mechanism are arranged in the guiding device, the linear transmission mechanism and the rotary transmission mechanism are both connected with a driver in the driving mechanism, and the linear transmission mechanism is connected with the rotary transmission mechanism. The concentric pipe is installed on the rotary transmission mechanism, and the anti-collision device is arranged on the rotary transmission mechanism. The parallel type design is adopted, each guide device independently controls the corresponding concentric tube, and surgical instruments are convenient to replace.

The invention belongs to the technical field of medical instruments, and relates to a high-speed sorting machine, which comprises a tube sorting unit for sorting scattered blood collection tubes to enable the blood collection tubes to be arranged in sequence; the sorting unit is used for sorting the blood collection tubes entering the tube sorting unit; the blood collection tubes sorted out of the sorting unit enter the sorting track; the at least one mechanical arm unit is used for clamping and placing the blood collection tubes on the sorting track to a preset position; the blood collection tubes on the sorting track are inserted into the tube inserting unit through the mechanical arm unit. After the structure is adopted, the device has the beneficial effects that the vacuum blood collection tubes can be continuously and quickly distributed to a plurality of sorting tracks after being rotated by a certain angle from a single tube sorting track. The functions of pre-sorting of the blood collection tubes in the sorting system and the buffer are achieved, and it is ensured that the problem of secondary sorting does not exist in the follow-up process; and the continuity of high-speed sorting is also ensured.

The invention discloses a multi-stage self-triggering type liquid carbon dioxide grading fracturing method. The method comprises the following steps that early-stage preparation work is conducted on a multi-stage self-triggering type fracturing pipe; liquid carbon dioxide is filled into the multi-stage self-triggering type fracturing pipe; the multi-stage self-triggering type fracturing pipe is placed in a drill hole in the target fracturing position and then connected with an exploder; the exploder is started, and the multi-stage self-triggering type fracturing pipes conduct multi-stage fracturing in sequence; and after fracturing is completed, the multi-stage self-triggering type fracturing pipe is recycled for reuse. The grading self-triggering fracturing device is constructed on the basis of the gas transfer rule and the memory alloy material, the liquid carbon dioxide single-point excitation and multi-stage self-triggering grading fracturing method is provided, and the problems that power of a liquid carbon dioxide fracturing single pipe is insufficient, and wiring of multiple pipes is complex are solved.

The invention discloses a comprehensive evaluation method and device for toughness of a water supply pipe network system and a computer medium. Firstly, hydraulic model parameters of a water supply pipe network are obtained; then, a low-stress scene, a medium-stress scene and a high-stress scene are constructed, the low-stress scene is constructed according to historical water demand data, the medium-stress scene is constructed by superimposing pipeline failure on the basis of the low-stress scene, and the high-stress scene is constructed by superimposing fire working conditions on the basis of the medium-stress scene; according to the hydraulic model parameters of the water supply pipe network, the water supply amount and the water demand amount of the water supply pipe network in a low-stress scene, a medium-stress scene and a high-stress scene are calculated respectively; and finally, according to the water supply amount and the water demand amount of the water supply pipe network in the low-stress scene, the medium-stress scene and the high-stress scene, calculating a plurality of strain indexes for quantifying the toughness of the water supply pipe network system. According to the method, the system toughness of the water supply pipe network is evaluated at low calculation cost through scene simulation of only traversing the single pipe failure and superposing the single-point fire working condition on the basis of the single pipe failure.

The present invention belongs to the technical field of medical devices, and specifically is a nursing suction device for an intensive care unit, including a left bottle, a right bottle, a gas transmission mechanism, a mounting frame, and a reversing mechanism. In order to improve the suction efficiency and reduce the discomfort of patients, a single-tube delivery method is adopted, and the patient can be treated with suction therapy and expectorant therapy respectively, reducing the number of pipes inserted into the affected part, and at the same time, the steps of pulling out and plugging pipes and expectorant therapy when treating thick sputum can be optimized, shortening the treatment time while improving the suction efficiency, solving the problem that traditional suction devices cannot perform expectorant therapy and too many pipes are inserted into the affected part for suction therapy. At the same time, the adjustment method of suction and expectorant is simple, and only the switching coil magnet and the trigger judgment of the left trigger and the right trigger need to be exchanged, which helps medical staff to master the use method more quickly, improve work efficiency, and save precious time.

The invention provides an intelligent gamete and embryo storage management system for a reproductive center, which comprises a heat preservation module, a liquid nitrogen storage module, a liquid nitrogen storage module, a liquid nitrogen storage module and a liquid nitrogen storage module which are connected with one another, the liquid nitrogen recycling module is used for recycling, separating and purifying gaseous nitrogen by utilizing a condenser and a closed-loop pipeline; the intelligent monitoring module is used for monitoring the liquid nitrogen tank in real time by using various sensors, processing and analyzing monitoring data, and calculating and judging whether the current state is a safe state or not; the analysis and prediction module is used for calculating the fault probability of the liquid nitrogen tank by utilizing a machine learning model; according to the high-density storage module, a multi-layer storage frame, a single-tube container and a multi-tube container are installed in the liquid nitrogen tank; and the centralized management module is used for constructing a sample file and remotely monitoring the real-time state and abnormity of the liquid nitrogen tank. Liquid nitrogen volatilization can be reduced to the maximum extent, the sample safety is guaranteed, the storage efficiency is improved, and the increasing requirements of test tube babies are met.

The utility model relates to the technical field of oil pipe four-way devices, and discloses an oil pipe four-way device for a Christmas tree, which comprises a Christmas tree main body, an oil outlet end of the Christmas tree main body is connected with an oil outlet pipe through a flange, and one end of the oil outlet pipe far away from the Christmas tree main body is connected with two filtering oil pipes through flanges. The oil outlet pipe is connected into the oil outlet end of the Christmas tree body, then the two filtering oil pipes are separated from the oil outlet pipe, when oil transportation is conducted, the two filtering oil pipes are separated from the oil outlet pipe, the oil outlet pipe is connected into the oil outlet end of the Christmas tree body, and the two filtering oil pipes are connected with the oil collecting pipe through flanges. The two filtering oil pipes are used for conveying oil, meanwhile, when one filtering oil pipe is damaged, the damaged filtering oil pipe can be closed through the first valve for maintenance, meanwhile, the other filtering oil pipe works normally, oil conveying cannot be suspended, and the problems that a single oil conveying pipe is damaged and is inconvenient to maintain, and the oil conveying efficiency of single pipe conveying is low are solved.

The invention discloses an energy-saving generator set axial flow channel composite cooling device, which relates to the technical field of cooling devices, and comprises an air cooling mechanism, a plurality of heat dissipation mechanisms, a plurality of control mechanisms, a plurality of connecting pipes, a liquid inlet and a liquid outlet. According to the device, temperature changes are sensed in real time through the memory metal sheet, a three-stage heat dissipation adjusting mechanism is automatically triggered, the heat dissipation requirements of the generator set under low, medium and high working conditions are accurately matched, basic heat dissipation is achieved through single-tube operation at the low temperature, three-tube enhanced heat dissipation is started at the medium temperature, and five-tube full-open maximum power heat dissipation is achieved at the high temperature; a linked cooling liquid flow three-stage adjusting system is matched, so that the heat dissipation efficiency and the temperature change are synchronized in real time, energy waste caused by traditional continuous full-power heat dissipation is reduced, the problem of fatigue cracks of metal parts caused by long-term thermal stress is effectively reduced, the service life of the device is prolonged, and the service life of the device is prolonged. The dilemma problems of supercooling waste and overheating damage of a traditional heat dissipation system are fundamentally solved.

The invention provides a single-row combined tubular solid oxide fuel cell stack structure, which comprises a plurality of single-row modules of a plurality of single-tube batteries, the plurality of single-tube batteries are arranged along the length direction of the single-row modules, and one single-tube battery is arranged in the width direction; a plurality of single-row modules are combined to form an electric pile; each single-row module comprises a supporting part on which each single-tube battery is fixed, and a cathode gas distribution part which is hermetically connected to the supporting part, is correspondingly communicated with the side on which the cathode of each single-tube battery is positioned, and is used for introducing cathode gas to the single-tube battery and discharging cathode tail gas after reaction; and the anode gas distribution part is connected to the supporting part in a sealing manner, is correspondingly communicated with the side where the anode of each single-tube battery is located, and is used for introducing anode gas to the single-tube batteries and discharging reacted anode tail gas. Through the structure provided by the invention, the problems that the gas flow path is complicated and the gas of each single-tube battery is difficult to uniformly distribute when the current multi-tube electric pile is expanded are solved.

The utility model relates to the technical field of essence and perfume sampling, in particular to a split detachable essence and perfume sampling device. According to the technical scheme, the device comprises an essence and fragrance sampler, a rotating disc, sampling cavities and a protective sleeve, the rotating disc is rotationally installed at the top of the essence and fragrance sampler, the sampling cavities are evenly formed in the essence and fragrance sampler, and a rubber head suction pipe is movably installed on one side in the rotating disc in a penetrating mode. Through the arrangement of the sampling cavity, the rubber head suction pipe, the tooth groove and the gear, the gear rotates between the arc groove and the tooth groove when a worker rotates the rotating disc, so that the rotating disc stably drives the rubber head suction pipe to rotate to the top of the specified sampling cavity, and then the rubber head suction pipe is rotated downwards; the rubber head suction tube is rotatably mounted in the specified sampling cavity through threads, and due to the fact that the sampling cavity is divided into three groups, a worker can rotate the turntable to respectively sample the three groups of sampling tubes, traditional single-tube sampling is replaced, and the sampling efficiency is improved.

The invention discloses a low-pulsation rolling wheel internal rotation parallel multi-pipe peristaltic pump which is characterized in that an extrusion mechanism, a driving mechanism, a rolling wheel rotating mechanism and a pipeline mechanism are arranged on a mounting table plate, the pipeline mechanism comprises an inlet and outlet liquid distribution pipe and a hose, and the liquid distribution pipe is arranged outside the extrusion mechanism in the vertical direction; the hoses are arranged in the extrusion mechanism in parallel at equal intervals in the vertical direction, and the two ends of the hoses are connected with the liquid distribution pipes correspondingly; the roller rotating mechanism is positioned on the inner side of the hose and connected with the driving mechanism; the driving mechanism drives the roller rotating mechanism to rotate and extrude the hoses, the single-pipe-multi-pipe-single-pipe fluid conveying process is achieved, continuous and uniform time differences exist when all the hoses are extruded and loosened, and continuous low-pulse fluid conveying is achieved. The peristaltic pump has the advantages of being low in abrasion loss of the inner wall of the hose and high in continuous filling precision, pulsation during fluid transmission is effectively reduced, and the problems that in an existing peristaltic pump, due to the fact that the inner wall of the hose is seriously abraded, a large number of particles are generated, fluid is polluted, and the continuous filling precision is low are solved.

An in-situ stress measurement device for ultra-deep non-vertical drilling adopts a technical route of single channel and bidirectional rolling of in-hole equipment, and its related functions are mainly realized by a bidirectional rolling device and a split-type axial-force-free circuit switching valve. The bidirectional rolling device can drive the in-hole equipment to move freely in a circumferential direction and back and forth, which changes sliding friction between the in-hole equipment and a hole wall into rolling friction during an in-situ stress measurement of non-vertical drilling. The split-type axial-force-free circuit switching valve provides a technical solution for a single-pipe test in the non-vertical drilling. The device greatly reduces wear of the in-hole equipment and the hole wall when the in-hole equipment is installed and withdrawn, can effectively protect markings of an impression measurement, and is suitable for high-efficiency in-situ stress measurement by a hydraulic fracturing method in the non-vertical ultra-deep drilling.

The utility model discloses a vacuum screw head, relates to the field of drilling of soil layers or rocks, and solves the problem that when a single-pipe drilling tool is pulled out of a drill to extract a rock core, the suction effect in a drill hole reduces the rock core extraction rate. According to the technical scheme, the vacuum screw head comprises a connecting base and a sliding sleeve, the connecting base comprises a connecting shaft provided with a pipe cavity and a base fixed to one end of the connecting shaft, the other end of the connecting shaft is a connector used for being directly or indirectly connected with a drill rod, the connecting shaft is arranged in an inner hole of the sliding sleeve in a penetrating mode, and the sliding sleeve can slide along the connecting shaft. The outer side of the sliding sleeve is provided with an external thread which is used for being directly or indirectly connected with a single-pipe drilling tool. The connecting shaft is further provided with a first through hole and a second through hole, the first through hole and the second through hole are both communicated with a pipe cavity of the connecting shaft, the position of the sliding sleeve on the connecting shaft is automatically controlled through friction force between the sliding sleeve and the hole wall of the drill hole, opening and closing of the first through hole and the second through hole are correspondingly changed, and a flushing fluid conveying channel is correspondingly changed. The utility model can improve the core recovery rate.

The invention relates to the technical field of wire feeding of welding equipment, in particular to a chain type wire feeding hose which comprises a plurality of pipe joints connected in sequence, the pipe joints are provided with through holes, at least one rolling wheel is arranged on the pipe joints in the peripheral direction, one end of each pipe joint is provided with a protruding part, and the other end of each pipe joint is provided with a groove part. The protruding part of one pipe joint is in butt joint with the groove part of the adjacent pipe joint and is hinged to the groove part through a pin shaft. The layout of the rolling wheels on the pipe joints is optimized, so that the length of the single pipe joint can be extremely short, and the manufactured whole hose is extremely good in flexibility and can be bent into a very small curvature radius. The pipe joints which are connected end to end are connected through the pin shafts, enough connecting strength is achieved, the large rotational freedom degree is achieved, and the pipe joints can be used in a self-contained mode under the condition that an outer sleeve is not used. And the structure without using the outer sleeve is open, so that impurities or dust falling from the surface of the welding wire can easily and automatically fall out and is not easy to accumulate inside, and the cleaning and maintenance are convenient. And due to the open structure, the product assembly work can be automated.

The invention belongs to the technical field of medical instruments, and particularly relates to a nursing sputum suction device for an intensive care unit, which comprises a left bottle, a right bottle, a gas transmission mechanism, a mounting frame and a reversing mechanism. In order to improve sputum suction efficiency and reduce discomfort of a patient, a single-tube conveying mode is adopted, sputum suction treatment and sputum reduction treatment can be carried out on the patient respectively, the number of tubes inserted into an affected part is reduced, meanwhile, the steps of tube pulling and inserting and sputum reduction treatment can be optimized when thick sputum is treated, the treatment time is shortened, and meanwhile the sputum suction efficiency is improved. The problems that a traditional sputum suction device cannot conduct sputum suction treatment and too many sputum suction treatment pipes are inserted into an affected part are solved, meanwhile, the adjustment mode of sputum suction and sputum suction is simple, only a coil magnet needs to be switched on and off, triggering judgment of a left trigger and a right trigger needs to be exchanged, medical staff can master the using method more quickly, working efficiency is improved, and the medical staff can conveniently use the sputum suction device. And precious time is saved.