115results about How to "Avoid disturbance" patented technology

The invention discloses a user track privacy protection method and system fusing a generative model and three-stage personalized differential privacy, and relates to the technical field of data security, and the method comprises the steps: obtaining real user track data, and carrying out the preprocessing of the real user track data to form standardized track representation; training a depth generation model to generate synthetic trajectory data; performing density clustering on the synthetic trajectory to obtain a feature region and calculating a region centroid; point-level privacy budgets are distributed according to three stages of the area proportion, the centroid distance and the global density; constructing an adaptive elliptical disturbance domain based on the regional covariance, sampling candidate confusion points in the disturbance domain and applying road feasibility screening; and calculating a score based on the privacy budget and the utility function, and sampling replacement points by adopting an index mechanism to output a privacy protection trajectory. According to the technical scheme, the track structure continuity and the road semantic consistency are remarkably improved under the condition that the differential privacy constraint is met, and the privacy intensity and the data availability are both considered.

The utility model relates to the technical field of biodiesel production, in particular to a catalyst separation and recovery device for converting waste oil and fat into biodiesel, which comprises a separation tank. A feed pipe is fixedly connected to the rear position at the upper end of the separation tank, a waste discharge pipe is fixedly connected to the middle position at the lower end of the separation tank, two observation windows are fixedly connected to the front surface of the separation tank, and two adjusting components are arranged at the front position at the upper end of the separation tank. The adjusting components include a positioning sleeve, a connecting seat, a threaded sleeve, a first bevel gear, a second bevel gear, an electric motor, a threaded pipe, a connecting block, a positioning block, a discharge pipe, a first suction pipe, a second suction pipe, a positioning rod and a limiting block; the threaded pipe is driven to lift through the adjusting components, so as to adjust the heights of the first suction pipe and the second suction pipe, so that the floating oil and esterified glycerol can be accurately sucked, the separation quality of the esterified glycerol is effectively improved, the purity of the catalyst recovery is further improved, and the waste of the esterified glycerol is avoided.

The invention provides a low-flow-resistance underwater sound insulation device which is characterized by comprising a plurality of air bags with the longitudinal sections in the shape capable of being densely laid. A set gap is kept between every two air bags, and the air bags are perpendicular to the water surface The device has the advantages that the broadband sound insulation performance is excellent, the main frequency band of underwater noise measurement is covered, and the influence of various noise sources on the test environment can be effectively inhibited; the hydrodynamic compatibility is good, the through-flow design of air bag array arrangement can maintain low flow resistance while realizing sound isolation, and significant disturbance to a test environment is avoided; and the modular design of the air bag is convenient to install, maintain and expand, and large-scale deployment in various water area environments is facilitated.

The invention relates to the field of high polymer material forming and processing, and discloses an automobile polylactic acid composite material interior trim production device which comprises a lower mold assembly, a supporting assembly, a traction assembly and an upper mold. The lower die assembly is slidably connected to the supporting assembly, and the traction assembly is arranged below the lower die assembly. The traction assembly drives a lower section mold in the lower mold assembly to do horizontal reciprocating motion through a driving motor and a transmission mechanism; and the transmission mechanism synchronously drives the sliding plate and the convex teeth in the lower section mold to vertically lift in a reciprocating manner. Through phase matching of the cam and the cam shaft, the convex teeth stretch out and pierce the material only when the lower section die moves in the stretching direction and retract in the return stroke, and intermittent one-way shearing of the bottom end of the material is achieved. The device further has a variable-speed variable-pitch adjusting function, and the shearing stroke and speed can be switched according to the material forming stage. According to the invention, molecular chain orientation can be effectively induced, and the crystallization rate of the polylactic acid material and the mechanical strength of the interior trim part are improved.

This utility model discloses a drying rack for rapidly drying membrane fibers, comprising: a support, a support rod, a drying rod, and hooks. The support rod is located on the support and has a hollow tubular drying rod with ventilation openings. The drying rod is connected to a ventilation device. A hook is located below the ventilation opening, and a baffle is provided between the hook and the ventilation opening. The hook is connected to the drying rod via an elastic element. This utility model, by providing ventilation openings on the drying rod, allows air to blow from top to bottom onto the suspended membrane fibers, accelerating drying and improving drying efficiency. By providing a baffle between the hook and the ventilation opening, ventilation is only activated when membrane fibers are suspended on the hook, preventing wasted air when all ventilation openings are open due to insufficient membrane fiber bundles, thus saving energy.

The utility model relates to down quilt technical field especially, relates to a kind of down quilt of even filling, including protective cover, the surface of the protective cover is equipped with horizontal and vertical staggered seam, the protective cover is divided into multiple independent square area with 30 centimeters side length by the seam;The top center of each square area is equipped with the opening for the filling tube of filling machine insertion, and the top of the protective cover is sewn with long strip edge bar.The utility model aims at the phenomenon of traditional protective cover because of the whole communication, the filling tube is moved inside and drives down migration, and the present application is divided into independent 30 centimeter side length square area by horizontal and vertical seam, each area is independently closed, and the flowing channel of down between area is blocked on physical structure, avoid the risk of down stringing during filling process and subsequent use, guarantee the stability of the filling amount of each area from the root.

The invention relates to the technical field of soil mass layered monitoring, and discloses a soil mass layered settlement monitoring device and a soft soil parameter dynamic updating method.The soil mass layered settlement monitoring device comprises a fixing steel plate, a plurality of fixing rods and a plurality of suspension plates, the fixing steel plate is arranged at the bottom of a soil mass, the fixing rods are perpendicularly arranged on the surface of the fixing steel plate, and scales are arranged on the outer surfaces of the fixing rods; the multiple suspension plates are located on the surfaces of all soil layers of the soil body respectively and arranged on the outer surfaces of the multiple fixing rods in a sleeving mode respectively, and indicating cylinders are arranged at the tops of the suspension plates. The fixed steel plate provides a stable foundation, and the plurality of fixed rods with scales ensure that the monitoring reference is accurate; the suspension plate is sleeved with the fixing rod, corresponds to soil layers of different depths and can synchronously move along with settlement of the soil layers, and the top indicating cylinder protrudes out of the surface of the soil layer, so that data reading is facilitated, and soil disturbance is avoided; the structure can synchronously capture layered settlement data of different depths and different positions, accurately distinguish independent deformation characteristics of each soil layer, and fill the blank that traditional equipment can only measure total settlement.

The multifunctional sampling device comprises a sampling barrel, an auxiliary barrel with the same diameter as the sampling barrel is arranged at the upper end of the sampling barrel, a driving unit and a fixing unit are sequentially arranged in the auxiliary barrel from bottom to top, and a collecting unit is mounted on the inner wall of the sampling barrel; the problems that in the rock-soil sampling process in the prior art, rock-soil at different diameters of a hole cannot be sampled, rock-soil on the surface layer of the inner wall of the hole cannot be removed, samples at different positions of the hole cannot be collected at a time, the sampling time is prolonged, the sampling efficiency is reduced, and the sampling time is shortened can be solved. The cost is increased; the angles of the limiting blocks with different heights are adjusted through the limiting rod, sampling of rock and soil samples with different depths and diameters is achieved, the sampling frequency of the same hole is reduced, the sampling requirements of different rock and soil samples are met, the multifunctionality and flexibility of the device are improved, the sampling time is shortened, and the sampling cost is reduced.

The application provides an outdoor termite inducing device, which comprises an inducing box, a medicine containing groove is arranged in the inner cavity of the inducing box, a pine block is arranged outside the medicine containing groove in the inducing box, a plurality of through grooves which are in communication with the outside are arranged on the side wall of the medicine containing groove in a circumferential direction, a cover is arranged at the upper end of the inducing box, a marker rod is arranged at the upper end of the cover, a wooden lower insertion pile is arranged at the lower end of the inducing box, a vertical through hole is arranged in the center of the wooden lower insertion pile, the wooden lower insertion pile comprises a first half pile and a second half pile which are combined, a holding sleeve is arranged at the upper end of the first half pile and the second half pile, the holding sleeve is sleeved with the inducing box, the length of the lower end of the first half pile is longer than that of the second half pile, and the problem that the outdoor termite inducing box is not easy to attract termites because the outdoor termite inducing box is buried shallowly is solved.

The embodiment of the present application provides a printing environment maintaining system and method, the printing environment maintaining system comprises a forming chamber, a gas monitoring device, a gas extraction device, a gas feeding device and a control device; the gas monitoring device is arranged in the forming chamber; the gas extraction device is communicated with the forming chamber and extracts the gas in the forming chamber when working; the gas feeding device is communicated with the forming chamber and feeds the inert gas into the forming chamber when working; the control device is connected with the gas monitoring device, the gas extraction device and the gas feeding device respectively; in the process of switching the forming chamber from an abnormal environment to a micro-positive pressure environment, the control device controls the gas extraction device and the gas feeding device to work cooperatively. In the scheme, the adverse effects of impurity gas on the forming quality are reduced, and the probability of the external gas penetrating into the forming chamber is reduced; meanwhile, the micro-positive pressure environment can also avoid the airflow disturbing the metal powder due to the excessively high pressure in the forming chamber, so that the quality of the printed part is ensured.

The utility model discloses a kind of composite material forming is perfused epoxy resin system, belong to composite material forming technical field, the composite material forming is perfused epoxy resin system including reaction kettle, intermittent adjusting mechanism and suction bubble subassembly;Intermittent adjusting mechanism includes support, first motor, disc, male shaft, moving plate, arc groove and stirring device;Suction bubble subassembly includes multiple movable grooves, floating ring, lightweight spring, suction bubble plate, suction bubble mouth, air duct and suction bubble machine.The composite material forming is perfused epoxy resin system by intermittent stirring to avoid local overheating, maintain resin low viscosity state;By double-motor design realizes motion and stirring decoupling, accurately controls reaction condition;Self-adapting suction bubble mouth is close to liquid level, in combination with negative pressure suction, significantly reduce micro-bubble residue, improve composite material compactness, solve the problem, such as uneven mixing, bubble residue in traditional epoxy resin perfusion, significantly improve composite material forming efficiency and product performance.

The utility model discloses a slab type ballastless track base plate formwork, including two side steel mould, the side steel mould is by base plate side mould top surface steel sheet, base plate side mould bottom surface steel sheet, base plate side mould panel and base plate side mould formwork rib plate welding composition, and the square steel of being connected between two side steel moulds, and the base plate expansion joint plug -in board of being set between two side steel moulds and being at square steel rear, the utility model discloses adopts the bolt assembly of block type steel formwork, and each base plate is by two steel moulds, and expansion joint position is disconnected with square steel and is connected two side formworks and square steel through bolt, and the expansion joint foam board is clamped between two base plate formworks with the collocation plug -in board, and this design effectively avoids the disturbance of concrete pouring and personnel trample to expansion joint, ensures that expansion joint is vertical, and linear is straight, greatly improves expansion joint construction quality, lays the foundation for track plate accurate laying, guarantees the high -quality completion of high -speed railway slab type ballastless track base plate construction.

The application discloses an ecological protection type river and lake construction water supply treatment equipment and relates to the technical field of water supply treatment. The treatment installation is provided with a water supply device, a layered control member, a secondary disinfection member, a lifting isolation member, a rotary cutting control member and an environmental protection control member. The environmental protection control member can be used for limiting the particle size of the flocculation and precipitation impurities during the discharge of the flocculation and precipitation impurities, avoiding the direct discharge of the agglomerated and blocked impurities, and solving the problems that the current river and lake construction water supply treatment equipment is inconvenient for the discharge of flocculation and precipitation and is inconvenient for the layered water taking.

This invention discloses a solid-liquid separation device and method for red mud treatment, relating to the field of solid-liquid separation technology. The invention includes a base, a sedimentation tank fixedly connected to the top of the base, an inlet pipe fixedly connected to the top of the sedimentation tank, a separation mechanism on the top of the base, a rinsing mechanism on the front of the separation mechanism, and a squeezing mechanism on the top of the base. The invention uses an external controller to start a first motor, driving a rotating shaft and a sliding plate to rotate slowly. Under the buoyancy of the float, the sliding plate and its extraction unit remain suspended on the surface of the supernatant, effectively avoiding interference from the thick sludge at the bottom. Then, a first water pump is started, and the clear supernatant is extracted and transported to a storage tank via a flexible first pipe and a first and second rotary joint that can adapt to rotation. This ensures the quality of the supernatant recovery and provides convenience for subsequent rinsing or reuse. Simultaneously, the rotary design avoids disturbance to the settling interface.

This utility model relates to a detachable pile foundation rebar cage assembly frame suitable for construction in steep slope areas. It includes a base, characterized by: a lower column and an upper column above the base; a lower horizontal bar and a middle horizontal bar between the lower columns; an upper horizontal bar at the top of the upper column; a lower diagonal bar between the lower column and the middle horizontal bar; an upper diagonal bar between the upper column and the upper horizontal bar; a lower hanging beam at the top of the middle horizontal bar; an upper hanging beam at the top of the upper horizontal bar; and chucks on the inner sides of the lower and middle horizontal bars. Compared with existing technologies, the core value of this utility model lies in achieving on-site assembly of the rebar cage without large-scale earthwork and large platforms / equipment, thereby reducing costs, protecting slope stability, ensuring construction safety, and significantly improving the feasibility of construction under such complex terrain conditions. It provides a practical, safe, and economical solution for pile foundation rebar cage construction in steep slope areas where traditional methods are difficult to implement or are too costly / risky.

The utility model discloses a portable ultrasonic consolidation detector for experiments, which belongs to the technical field of soil body detection and comprises a base shell and a counter-force gantry. The base shell is provided with a pressure supply device for providing pressure for an experiment; a pressure-bearing excitation transducer and a pressure-bearing receiving transducer are mounted on the pressure supply device; the upper part of the pressure-bearing receiving transducer is detachably connected with a water-permeable cutting ring for placing a sample; the water-permeable cutting ring is composed of a steel ring and a water-permeable ring arranged on the inner side wall of the steel ring; the exterior of the base shell is connected with a data acquisition and analysis system for acquiring and analyzing data; two sets of fixing mechanisms used for supporting the fixing devices are installed on the outer side wall of the base shell. According to the mode, the small consolidometer can be directly fixed in a vehicle and carried to a sampling site for testing, so that the disturbance of a sampling sample in the transfer process is effectively avoided, and the testing precision is further improved.

The invention relates to the technical field of mine filling, and discloses a high-flux slurry continuous pumping system for underground goaf governance, which comprises a pumping driving unit, a pipe network sensing unit and a central control unit, and is characterized in that sine disturbance signals are superposed at a pumping reference frequency through the central control unit, and pressure disturbance waves carrying phase characteristics are constructed; extracting a phase deviation parameter of the pipe network response waveform, and identifying that the pipeline is in a metastable state deposition stage when the change rate of the phase deviation parameter exceeds a threshold value; outputting a flutter signal to induce interface softening of the sediment, and connecting and outputting an asymmetric pressure pulse of which the rising edge slope is greater than the falling edge slope so as to peel the sediment; according to the method, the abnormal flow resistance is recognized in the deposition stage before dominant fluctuation of the outlet pressure occurs, the instantaneous peak pressure intensity in the blockage clearing process is reduced through a softening and stripping mechanism, and the structural safety of a pipe network under the high-throughput conveying working condition is maintained.

The utility model discloses a coffee machine, coffee powder connects powder device, apply to coffee machine technical field, include: weighing assembly (5), weighing assembly (5) is used for the weighing of coffee powder, hammering component (1), hammering component (1) is used for the compaction of coffee powder, hopper (3), the hopper (3) is equipped with the cavity of holding coffee powder, the powder ring (2), one end of powder ring (2) with hammering component (1) is equipped with the butt -joint overlapping portion, when falling powder, the other end of powder ring (2) with hopper (3) has the gap, when pressing powder, the other end of powder ring (2) with hopper (3) abuts. Make falling powder and the whole process of pressing powder can reduce the powder body splash, eliminate powder body outer escape hidden danger.

This invention provides a seed germination box based on visual observation, relating to the field of agricultural intelligent equipment technology. It includes: a cultivation box with a horizontal positioning block on its outer side and a vertical positioning rod inserted inside the block; an electric motor and a camera mounted on the top of the cultivation box; two rotating holes aligned at the top and bottom of the cultivation box, with a rotating shaft between them; two sets of storage trays mounted on the outer side of the rotating shaft; a spray sleeve inserted inside the cultivation box; and a set of temperature control lamps mounted on the inner side of the cultivation box. This visual observation-based seed germination box enables comprehensive visual monitoring, maintains a constant internal cultivation environment, has high space utilization, allows for simultaneous cultivation of multiple seed groups under uniform light, and provides precise and quantitative water supply.

The invention relates to a float glass flow channel waste discharge device which comprises a main cover plate arranged on the upper portion of a flow channel and further comprises an auxiliary cover plate, a first telescopic rod, a plurality of adjusting plates, a sucking pump, a controller, a plurality of thermocouples and an adjusting assembly, the auxiliary cover plate is arranged on the top of the main cover plate, and a closed cavity is formed between the main cover plate and the auxiliary cover plate; a plurality of strip-shaped exhaust holes are formed in the main cover plate and the auxiliary cover plate in parallel and correspond to each other up and down; the length direction of the exhaust holes is parallel to the flowing direction in the flow channel; the adjusting plates are of a right triangle structure and correspond to the exhaust holes in a one-to-one mode, the adjusting plates are attached to the top face of the main cover plate and arranged on one sides of the exhaust holes in a sliding mode, and the right-angle long sides of the adjusting plates are parallel to the extending direction of the exhaust holes. Overall coarse adjustment of the exhaust flow in the length direction of the runner is achieved, and the differential requirements of a high-waste-gas and high-temperature area at the melting furnace end and a low-working-condition area at the tin bath end are accurately met.

The utility model discloses metal pipe fitting punching equipment. The metal pipe fitting punching equipment mainly comprises a frame body, a vertical plate, a punching mechanism and a clamping and pushing mechanism, a rotary disc is arranged in the end of the clamping and pushing mechanism, a spiral guide groove is formed in the end of the rotary disc, the rotary disc rotates to drive the guide groove to rotate, and the guide groove rotates to drive the clamping and pushing mechanism to clamp the end of the pipe and rotates to drive the pipe to rotate to change the punching position. According to the utility model, the problem of unstable rotation while clamping in the punching process of the metal cylindrical pipe fitting is solved, the punching operation efficiency of the metal pipe fitting can be effectively improved, and the quality of a finished product is improved.

The application discloses a two-phase absorbent proportioning storage tank and a carbon capture system. The two-phase absorbent proportioning storage tank comprises a first cylinder, a second cylinder, a plurality of partitions, a liquid supply assembly and a stirring assembly. The first cylinder is sleeved outside the second cylinder. The second cylinder has a first cavity. The first cylinder and the second cylinder define a second cavity. The plurality of partitions are arranged in the second cavity and divide the second cavity into a first chamber, a second chamber and a plurality of third chambers. The first chamber is used for storing lean phase solution separated by a phase separation device. The second chamber is used for storing lean liquid obtained after regeneration by a regeneration tower. The plurality of third chambers are used for respectively storing different components of the absorbent. The liquid supply assembly is arranged between each chamber in the second cavity and the first cavity. The stirring assembly is arranged in the first cavity. The application can store and proportionally adjust the absorbent before entering the absorption tower, optimize the proportioning of each component in the two-phase absorbent, and improve the efficiency and effect of carbon capture in the subsequent absorption tower.

The coke breeze cyclone separator comprises a first cylinder, a volute body, a first conical cylinder and an exhaust pipeline, gas containing coke breeze enters the volute body from a gas inlet, flows along the inner wall of the volute body and is guided to form a rotating vortex, and spirally flows downwards towards the conical cylinder along the first cylinder; the coke breeze is thrown to the inner wall of the first cylinder under the action of centrifugal force, the coke breeze loses inertia force and falls into the dust collecting hopper along the wall face, treated gas continuously flows into the center in the descending process in the conical cylinder to form centripetal radial airflow, the central airflow spirally ascends and enters the exhaust pipeline, and spiral blades are arranged on the inner wall of the exhaust pipeline in the exhaust direction. The spiral direction of the spiral blades is opposite to the spiral direction of gas, the spiral blades and spiral airflow generate shearing force, the stability of the airflow is destroyed, the airflow forms rising micro-turbulent flow between the blades, coke breeze collides with the inner wall of the exhaust pipeline and the blades, secondary separation in the exhaust pipeline is achieved, and the powder discharging efficiency of the coke breeze cyclone separator is improved.

A separating machine for separating products by the difference in specific weight of the products is provided. The separating machine comprises a first extraction unit comprising a first open endless belt. The separating machine comprises a liquid container for receiving and separating products on difference of specific weight. The container has a first flat surface extending between the bottom and a first rim of the container, the inner side of the first open endless belt contacts this first flat surface along at least part of the first flat surface while moving from said bottom to said first rim. The first extraction unit comprises a first discharge means at the inner side of the first open endless belt for discharging a first type of material carried along with said open endless belt, which first type of material passes the openings in said first open endless belt. The first extraction unit comprises a second discharge means at the outer side of the first open endless belt for discharging a second type of material carried along with said first open endless belt, which second type of material is larger than the openings in said first open endless belt.

The invention discloses a constant-speed lowering device and method for a through large-diameter vertical hole casing for an underground coal mine. The device mainly comprises hoisting anchor cables circumferentially and uniformly distributed on a top plate of an orifice, an orifice anti-falling device mounted on a bottom plate, a guide head and a multi-strand steel wire rope traction system which are connected with a casing string, and a plurality of independently suspended chain blocks. According to the method, a plurality of chain blocks are manually and synchronously operated to achieve controllable constant-speed lowering of a casing pipe, alternate holding and loosening of an orifice safety slip are utilized, an original segmented traction point resetting step is combined, and operation is cyclically conducted till the target depth is reached. According to the scheme, the technical problems that an underground large-diameter deep hole casing pipe is prone to deflection and difficult to move at a constant speed in the lowering process, and the falling risk exists are effectively solved, and the device has the outstanding advantages of being high in safety, good in stability, controllable in operation, high in adaptability and the like.

The invention relates to an anti-fogging self-cleaning laparoscope which is characterized in that a transparent glass sheet is fixedly arranged at the outer end of an objective lens at the far end of the laparoscope, and a closed carbon dioxide gas groove is formed in a gap between the transparent glass sheet and the objective lens; an air inlet pipeline is fixed along the inner wall of an outer tube of the laparoscope, a corresponding air inlet hole is formed in the near end of the air inlet pipeline, and the far end of the air inlet pipeline penetrates through the objective lens and extends into the carbon dioxide gas groove; a gas outlet pipeline is fixed along the inner wall of the outer tube of the laparoscope, the far end of the gas outlet pipeline extends into the carbon dioxide gas groove, and the near end of the gas outlet pipeline exhausts gas through a gas exhaust hole; and the air inlet is externally connected with a carbon dioxide air source. The laparoscope solves the technical problems that an existing laparoscope is prone to causing fogging of an objective lens and infection of tissue fluid in a minimally invasive abdominal surgery, consequently, the surgical field is blurred, and surgical operation needs to be interrupted due to the fact that a real-time processing function does not exist.

The present application relates to a kind of coal mine mining roadway type coal seam gas fracturing device, belong to coal mine gas extraction and fracturing technical field;Including pump truck body, main machine and high-pressure pump are fixedly arranged on pump truck body, the output end of high-pressure pump is provided with the first fracturing pipe and the second fracturing pipe of mutual docking, the outer side of the end of first fracturing pipe and second fracturing pipe away from each other is fixedly sleeved with packer, inner sleeve for shunting is inserted into first fracturing pipe, inner sleeve extends to the inside of second fracturing pipe, and disturbance mechanism is arranged on the outside of first fracturing pipe and second fracturing pipe;Top extension mechanism is arranged on pump truck body, and the chassis of pump truck body is lowered by top extension mechanism;Support mechanism is also arranged on pump truck body, and the support mechanism includes four telescopic arms, and the pump truck body is more stable by the unfolding of four telescopic arms;The problem that the existing roadway type fracturing device is poor in fracturing effect and lacks stability is solved.

The present application relates to shale oil oil liquid conveying technical field, especially shale oil oil liquid conveying device, including plunger pump box body, torsion shaft and gear, wherein, torsion shaft longitudinal setting and with plunger pump box body rotation seal connection, gear coaxial fixed setting on torsion shaft, and gear sets up inside plunger pump box body, the upper and lower sides of each gear are engaged with the transversely arranged rack, both ends of the rack are fixedly provided with a plunger, each plunger is correspondingly provided with a cylinder structure, the cylinder structure includes inner cylinder and outer cylinder, wherein, outer cylinder coaxially covers the outside of inner cylinder, to form annular chamber between inner cylinder and outer cylinder, one end of inner cylinder is fixedly installed on the side of plunger pump box body, and the plunger is slidingly sealed in the inner cylinder, one end of outer cylinder is sealingly and fixedly connected with the outer surface of inner cylinder through a sealing ring cover, the present application can reduce the installation space of the whole conveying device, reduce its installation difficulty, and the adaptability to external factors such as wellhead layout is better.