54results about How to "Quick pull" patented technology

The invention discloses an automatic screw locking device and method for a hard disk support. The automatic screw locking device comprises a rack, a rotary disc arranged on the rack, a fixed disc concentric with the rotary disc, a graduator arranged on the rack and used for driving the rotary disc to rotate and a plurality of jigs arranged on the rotary disc in the circumferential direction. The automatic screw locking machine is characterized by further comprising a feeding station, a first screw locking mechanism, a first turnover mechanism, a second screw locking mechanism, a second turnover mechanism, a third screw locking mechanism, a discharging mechanism and a reset mechanism which are arranged on the machine frame in the circumferential direction of the rotary disc. And three drawing mechanisms corresponding to the first turnover mechanism, the second turnover mechanism and the reset mechanism respectively are arranged on the fixed disc. The mechanism has the advantages that the cost is effectively saved, and the complexity of the whole mechanism is reduced.

The utility model relates to the technical field of power equipment, and discloses a modular power distribution system, which comprises a bottom plate and a plurality of circuit breakers, the upper end of the bottom plate is fixedly connected with a plurality of mounting seats, one side of the upper end of each mounting seat is provided with a slot, one side of each mounting seat is fixedly connected with a fixed plate, and the fixed plates are fixedly connected with the circuit breakers. Four springs are fixedly connected to one sides of the multiple fixed plates, moving plates are fixedly connected to the ends, away from the fixed plates, of every four springs in one group, and hook plates are fixedly connected to the ends, away from the springs, of the multiple moving plates. According to the modularized power distribution system, the insertion slots, the hook plates, the hook grooves and the insertion plates are arranged. The circuit breaker can be conveniently mounted and dismounted. Each circuit breaker is an independent module and can be quickly inserted and pulled out, so that the maintainability and flexibility of the system are improved, the whole system does not need to be disassembled and reinstalled on a large scale, and the maintenance difficulty and cost are reduced.

The utility model relates to filter technical field especially a kind of refrigeration equipment dynamic filter, including filter shell, the inside of filter shell is provided with filter core subassembly, the inside installation of filter core subassembly has rotary loosening mechanism, the both ends of filter shell are fixed with first connecting pipe, the outer end of first connecting pipe is fixed with connecting sleeve, the inside connection of connecting sleeve has the second connecting pipe for connecting between outside pipeline. Advantageous effect lies in: the utility model first spring elastic connection frame and metal filter screen promote the both ends of drying agent, keep the both ends of drying agent neat and not loose fall off;Inside the drying agent rotates loosening frame, so that loosening frame rotates loosening to drying agent, keep loose between drying agent, facilitate filter internal air circulation, improve the drying effect of drying agent to air.

The utility model discloses a vehicle-mounted drawing hidden mobile phone support, which comprises a shell and a hidden drawing module, the hidden drawing module and the shell are inserted in a drawer manner, an aromatherapy rod is movably inserted into the hidden drawing module, and the mobile phone support is rotatably arranged in the hidden drawing module. The drawing module can be completely contained in the shell, the driving view is prevented from being blocked, the interior of a vehicle is kept clean and tidy, the mobile phone support is horizontally contained in the groove in the conventional state and can be unfolded for use only by drawing, the aromatherapy grid is integrated on the edge of the drawing plate, the aromatherapy rod is supported to be freely inserted and pulled, the vehicle-mounted aromatherapy function is achieved, and the aromatherapy rod is convenient to replace due to the design of the rotating cover; and user experience is improved.

The invention discloses a subsea pipeline initial anchoring method in a complex sea area, according to the subsea pipeline initial anchoring method in the complex sea area, anchoring is achieved through a vibratory hammer assembly, the vibratory hammer assembly comprises a vibratory hammer, and a subsea pipeline laying initial steel pile anchor point is driven in or pulled out through the vibratory hammer. According to the initial anchoring method for the subsea pipeline in the complex sea area, the steel pile can be rapidly driven in and pulled out in the complex sea area, and the initial cable laying efficiency is remarkably improved; the vibratory hammer assembly is used for driving and pulling the steel pile, large ship resources do not need to be occupied, the applicable construction range is wide, limitation of construction conditions such as pipelines and geology is small, the situation that subsea pipeline laying tension is insufficient is effectively avoided, reasonable arrangement of procedures is facilitated, in addition, steel pile materials can be recycled, overall operation is convenient, construction is convenient, and the construction cost is reduced. And the construction risk and the project cost are reduced.

The utility model provides a quick soil unloading device for a rotary excavating drill bit, belongs to the technical field of building construction, and effectively solves the problems that the conventional rotary excavating drill bit is difficult in slag unloading, high in slag unloading noise and the like. According to the technical scheme, the device comprises a soil collecting box, a soil unloading component is arranged on the inner side of the soil collecting box, a lifting rotating mechanism matched with the soil unloading component is arranged at the bottom of the soil collecting box, the soil collecting box is connected with a dust falling component, and a plurality of first universal wheels are arranged at the bottom of the soil collecting box. The quick soil unloading device for the rotary excavating drill bit has the beneficial effects that soil is easy to unload, the noise is low, the manufacturing cost is low, and the construction efficiency can be effectively improved.

The application belongs to the technical field of medical devices, and particularly relates to an injection mechanism for emergency treatment, which comprises a syringe and an open-box body, the syringe comprises a barrel, a needle plug and a needle, the needle plug is arranged in the barrel, the needle is installed on the barrel, a first clamping mechanism for limiting the relative movement of the needle plug relative to the barrel is installed on the barrel, the free end of the first clamping mechanism is clamped on the needle plug, a sliding seat is slidably installed in the open-box body, an installation groove is formed in the sliding seat, the barrel of the syringe is inserted into the installation groove, a first compression spring is installed below the sliding seat in the open-box body, a second clamping mechanism is installed on the open-box body, the free end of the second clamping mechanism is clamped on the sliding seat, a cover is further installed on the open-box body, and the cover is in transmission connection with the second clamping mechanism. The purpose is to solve the problem of low efficiency caused by the structural defects of the existing injection mechanism.

The utility model discloses a kind of quick plug type electric connectors, it is related to electric connector technical field, including socket and clamping assembly;Socket: inside front end is inserted with plug, the surface of the plug is equipped with connecting assembly and disassembly component, the connecting assembly and disassembly component are connected;Clamping assembly: including connecting plate, clamping strip and clamping hole, the upper and lower ends of the surface of the plug are fixed with two corresponding connecting plates, the front side of the connecting plate is equipped with sliding port, the inside sliding connection of the sliding port has clamping strip, two clamping strips are fixed on the surface of socket, the front side of the clamping strip is equipped with clamping hole, the connecting assembly is connected with two clamping holes, by setting clamping assembly, the stability of socket and plug connection can be effectively improved, the connecting assembly includes fixed plate, clamping column, limit ring, spring and rubber column, the stability of connection can be maintained, and it is convenient and fast to plug in and pull out.

The tableware taking and placing structure comprises a cleaning machine body, a box door is rotationally connected to the lower portion of the front side of the cleaning machine body, a basket is arranged in the cleaning machine body, sliding columns are fixedly connected to the two sides of the basket, sliding grooves are formed in the two sides in the cleaning machine body, and the box door is connected to the lower portion of the front side of the cleaning machine body. Mounting grooves are formed in the two sides of the front end of the cleaning machine body, limiting grooves which are evenly distributed are formed in the two sides in the basket, inserting grooves are formed in the upper portions in the limiting grooves, a plurality of connecting columns are arranged in the basket, partition columns which are evenly distributed are fixedly connected to the tops of the connecting columns, and mounting columns are fixedly connected to the two ends of each connecting column. According to the tableware cleaning machine, the basket can slide in the sliding grooves in the two sides in the cleaning machine body through the sliding columns on the two sides, the basket can be conveniently and rapidly pulled, tableware can be conveniently taken and placed, and the sliding columns can be limited after the basket is matched with the clamping blocks to rotate.

The utility model discloses a fast plug type modularized automobile wire harness comprising a connecting line, two sides of the connecting line are fixedly connected with connecting handles, one side of each connecting handle is fixedly connected with a connector, and the center line of each connecting handle and the center line of each connector are on the same horizontal plane. According to the quick plug-pull type modularized automobile wire harness, the connecting handle is arranged, the movable sleeves at the two ends of the connecting handle are pressed to drive the connecting plate to move during installation, and the connecting plate drives the positioning block to contract so that the connector can be inserted into a corresponding socket of an automobile system; after insertion, a movable sleeve is loosened, the movable sleeve pushes out a connecting plate under pushing of a spring, the connecting plate drives a positioning block to be inserted into a clamping groove formed in an insertion opening, and therefore the connector is positioned through the connecting plate; when the connector needs to be pulled out, the movable sleeves at the two ends of the connecting handle are pressed, the connecting plate drives the positioning block to be separated from the socket, and then the connector can be quickly pulled out, and the problem that plugging and pulling are not convenient is solved.

The application belongs to the technical field of airport business and link tracking, and discloses a business-level link tracking method and system based on airport business. The method uses a business-level multi-language adaptation probe based on dynamic bytecode enhancement technology, performs semantic analysis on collected data through a multi-dimensional label recognition engine, extracts a flight number and an event code business label, establishes an associated mapping between the business label and a technical call link, constructs a business link monitoring system in an airport multi-vendor environment, and realizes business-level fault positioning; based on the business label associated information, cross-system link integration is performed to construct a business-driven full-link tracking view; through multi-dimensional business topology analysis and a dynamic early warning mechanism, intelligent positioning and visual display of business faults are realized. The application can sample as needed, only record key requests and interfaces with long time consumption, and can be integrated with other monitoring systems to quickly respond to and solve problems.

The heat exchange module of the water heater comprises a heat exchanger, a quick connector, a first pipeline and a second pipeline, the quick connector comprises a body and a movable part which is movably connected relative to one side or two sides of the body, and connecting cavities are formed in the two ends of the body. A clamping spring is arranged in the connecting cavity on one side or the connecting cavities on the two sides, the clamping spring comprises a clamping part and an extension part, and a groove or a protrusion is arranged on the first pipeline and / or the second pipeline. In the process that the movable part moves towards the clamping spring, the movable part expands the extension part and enables the clamping part to be opened outwards so as to release the groove or the protrusion. When the movable part moves away from the clamp spring, the extension part and the clamping part contract through self elasticity so as to clamp the groove or the protrusion. According to the heat exchange module of the water heater and the water heater comprising the heat exchange module, the pipelines can be quickly inserted or pulled out, the structure is simple, the connection operation efficiency is high, and convenience is achieved; and the connection reliability is high, and loosening and separation are not prone to occurring.

The utility model discloses a valve transport device for valve production, it includes fixed plate, one end fixed mounting of fixed plate has push rod. Through above -mentioned structure, the valve transport device for valve production of this technical scheme, and the storage box is divided to multiple independent storage groove through baffle and interval plate, and the storage box of each storage groove can be individually pulled through handle, and the support plate of both sides of storage box is sleeved in the outside of support shaft through mounting groove, and the roll stick of upper and lower two ends in mounting groove is closely contacted with support shaft surface, and when pulling the storage box, the roll stick rolls along the support shaft, and the sliding friction is converted into the rolling friction, and the pulling resistance is greatly reduced, and the operator can easily pull or push the storage box from the storage groove, and simultaneously, the cooperation of the internal circular groove of support shaft and the bottom limiting ring of support rod can prevent the storage box from separating from the storage groove when pulling, guaranteeing the operation safety, further improving the efficiency of loading and unloading valve, and realizing the classification quick loading and unloading of multiple valves.

The invention relates to the technical field of vehicles, and discloses a guide sleeve pulling-out device which comprises a longitudinal pulling rod capable of penetrating through a guide sleeve, a transverse rotating rod perpendicular to the pulling rod is fixed to the top end of the pulling rod, a first thread is arranged on the upper portion of the pulling rod, a second thread is arranged on the lower portion of the pulling rod, and the first thread and the second thread are opposite in direction. The upper portion of the pulling rod is sleeved with a hollow sleeve with an opening in the lower portion, the upper surface of the sleeve is provided with a first through hole allowing the pulling rod to penetrate through, the first through hole is provided with through hole internal threads matched with the first threads, the lower portion of the pulling rod is sleeved with a bottom supporting cushion block and a fixing nut, and the fixing nut is located below the bottom supporting cushion block. And the fixing nut is provided with a nut internal thread matched with the second thread. The invention further discloses a using method of the guide sleeve pulling-out device. According to the guide sleeve pulling-out device and the using method thereof, the guide sleeve can be pulled out rapidly in a lossless mode, and potential safety hazards are eliminated.

The utility model discloses a kind of electric connector and connector assembly, belong to electric connector field, a kind of electric connector, including shell, locking piece, conducting terminal, lock catch, and draw belt, the inside of shell is equipped with several conducting terminals, conducting terminal has limit part, locking piece is installed in shell, and it is inserted into shell and with the end wall of limit part abuts and / or close setting, to keep conducting terminal in required position, at least one side wall of shell has lock catch, draw belt is connected with lock catch through locking piece.This electric connector and connector assembly of the utility model, through the draw belt that locking piece is connected lock catch avoids shell complex structure to open, enhance protection, simplify structure, optimization layout, benefit miniaturization integration, and make locking piece have limit and draw belt wear function, realize the collaborative operation of multiple functions, substantially improve comprehensive performance.

The invention discloses a support for building construction with a stabilizing mechanism, which relates to the technical field of construction support, comprises a support mechanism and a support frame installed on both sides of the support mechanism, a stabilizing mechanism is arranged on the back side of the support mechanism, and a lifting support is arranged on the outer side of the stabilizing mechanism, the support mechanism comprises a movable base, a mounting sleeve is fixedly installed around the top of the movable base, a supporting base is arranged inside the mounting sleeve, and the supporting base is fixedly connected to the movable base, wherein a first supporting spring is fixedly installed at the top center position of the supporting base, a supporting top plate is fixedly connected to the top of the first supporting spring, and the mounting sleeve is used to realize rapid installation and fixation of the support frame, and at the same time, when the support frame descends, the clamping movable support will be driven to descend, and under the action of the first connecting support and the clamping rotating rod, the rotation of the arc-shaped clamping arm is realized, thereby preliminarily clamping and fixing the support frame.

The present invention discloses a quick-plug power connector for safely isolating an external environment, and relates to the technical field of connectors, including a socket, the socket is plugged with a plug, the plug is horizontally slidably connected with a sliding cover for covering the connection port between the socket and the plug, a side of the plug close to the socket is fixedly connected with a limit block symmetrically distributed along the plug, the limit block is slidably connected with the sliding cover, the limit block is threadedly connected with a screw rod, the screw rod is rotatably connected with the sliding cover, the side of the limit block away from the screw rod is rotatably connected with a rotating block, the socket is provided with a limit channel symmetrically distributed along the socket, and the limit channel is limitedly matched with the corresponding limit block. The present invention prevents dust, water stains and other substances from entering through the gap between the plug and the socket through the isolation and sealing effect of the sliding cover, reduces the occurrence of short circuit events, and improves the stability factor and safety factor of the interface connection between the plug and the socket.

The utility model discloses a flood control baffle for water conservancy and hydropower, and belongs to the technical field of flood control baffles, the flood control baffle comprises two limiting stand columns and a plurality of protection structures, the protection structures are selectively clamped in the two limiting stand columns, each protection structure comprises a first baffle, and the side face of each first baffle is fixedly connected with two anti-falling blocks; by arranging the turnover plate and the adjusting structure, the movable block pushes the turnover plate to turn over through the adjusting plate, so that the turnover plate is turned over and opened, and due to the fact that the end, away from the pressing plate, of the turnover plate is in an inclined state facing the ground, the special design enables water to apply downward acting force to the turnover plate; the acting force is beneficial to further pressing the protection structures and ensuring that all the protection structures can be tightly attached, the stability of the whole flood prevention baffle system can be remarkably improved, flood is effectively prevented from leaking from the position between the second baffle and the first baffle, the risk of water leakage is greatly reduced, and the service life of the flood prevention baffle system is prolonged. Therefore, the safety and the reliability of the flood control baffle are improved.

The utility model discloses a kind of forming drilling chamfering cutters of processing new energy automobile copper charging plug, it is related to drilling chamfering cutter technical field.The utility model includes two groups of tool shank, the top end of one group of tool shank and the bottom end of another group of tool shank are all fixed with wedge block, the bottom of one group of wedge block is equipped with slot, the top of another group of wedge block is equipped with plug, fastening screw hole is set in the outer surface of plug, the utility model is equipped with clamping cylinder, wedge block, wedge slot anti -unthreaded bolt and the setting of anti -unthreaded bolt hole, when chuck is fixed when clamping drill bit cutter in actual use, staff can insert clamping cylinder into chuck, make chuck clamping force act on clamping cylinder rather than blade belt, to form reliable protection to blade belt, completely avoid the deformation, damage etc. of blade belt due to chuck directly clamping blade belt, guarantee drilling accuracy and operating efficiency, extend the service life of drill bit.

The utility model relates to a heptafluoropropane fire extinguishing device capable of preventing false starting. The heptafluoropropane fire extinguishing device comprises a fire extinguisher body, the fire extinguisher body is clamped in the anti-false-starting clamping assembly, the anti-false-starting clamping assembly is used for protecting a starting device of the fire extinguisher body, the anti-false-starting clamping assembly comprises a fixing box, a top cover, a limiting plate, a spring and a clamping block, the top cover is welded to the top of the fixing box, the limiting plate is welded to the interior of the fixing box, and the spring is arranged on the limiting plate; one end of the spring is fixedly connected with the inner side wall of the fixing box, the other end of the spring is fixedly connected with the clamping block, the clamping block is slidably connected with the fixing box, the top cover and the limiting plate, a sliding groove is formed in the bottom face of the fixing box, and the fire extinguisher body is clamped in the sliding groove. According to the fire extinguisher, the fire extinguisher body can be better protected against false starting, meanwhile, the fire extinguisher body can be quickly taken out for use, the taking operation time is saved, and fire extinguishing work can be performed more quickly.

The utility model discloses an electronic cigarette charging box, and relates to the related technical field of electronic cigarettes. The box comprises a box body, a storage groove is formed in the left portion of the upper end face of the box body, positioning foam plates are arranged on the front side face and the rear side face in the storage groove, bouncing holes are formed in the positions, located in front of and behind the charging socket, of the bottom face of the storage groove, bouncing columns are arranged in the bouncing holes, a linkage plate is arranged in the linkage opening, and a movable rod is fixed to the middle of the upper end face of the linkage plate. A pressing column is slidably arranged in the pressing opening, a ring rod located in the linkage opening is fixed to the rear end of the pressing column, and a limiting rod inserted into the limiting hole is fixed to the rear portion of the ring rod. According to the utility model, the pop-up column extends out of the pop-up hole, so that the electronic cigarette can be conveniently and quickly popped up from the interior of the storage groove, and meanwhile, the electronic cigarette can be extruded and limited by the positioning foam plates on the front and rear side surfaces of the storage groove after being put into the storage groove, so that the position of the electronic cigarette can be stable.

The utility model relates to an ultrasonic probe protection device, belongs to the technical field of medical instruments, and solves the problems that in the prior art, an ultrasonic probe is easy to damage after being exposed for a long time, and dust or particulate matters are easy to enter the ultrasonic probe. The utility model provides an ultrasonic probe protection device which comprises a protection assembly, a dismounting assembly and a sealing assembly. The protection assembly is used for protecting the ultrasonic probe assembly, the dismounting assembly is connected with the protection assembly and used for enabling the ultrasonic probe assembly to be quickly inserted into and pulled out of the protection assembly, and the sealing assembly is connected with the ultrasonic probe assembly and used for sealing the ultrasonic probe assembly. The ultrasonic probe assembly is used for keeping the inner cavity of the protection assembly closed after the ultrasonic probe assembly is inserted into the protection assembly, dust is prevented from entering the protection assembly, the ultrasonic probe does not need to be exposed outside for a long time and is prone to being damaged, and dust or particulate matter does not easily enter the ultrasonic probe.

The utility model provides a rack for a laser cutting machine, and relates to the technical field of cutting machine racks. The workbench is welded and mounted on the upper surface of the bottom bin; the cleaning device is fixedly mounted on the upper surface of the workbench and is used for cleaning the upper surface of the cut workbench; the mounting device is slidably connected to the side wall of the workbench, rapid mounting and dismounting of the laser cutting machine are achieved, the cleaning device comprises an electric push rod, the electric push rod is fixedly connected with the upper surface of the workbench, the output end of the electric push rod is fixedly connected with a connecting bolt, and the arc surface of the connecting bolt is connected with a cleaning plate in a penetrating mode. And the circumferential outer wall of the connecting bolt is in threaded connection with a bolt sleeve, the cleaning plate is arranged between the connecting bolt and the bolt sleeve, a side plate is fixedly installed on the upper surface of the workbench, and the cleaning plate is in sliding connection with the side plate. The laser cutting machine solves the problems that waste materials and metal particles left on a table board after cutting are inconvenient to clean, and the laser cutting machine is tedious to mount and dismount.

The utility model discloses a replaceable composite filter screen which comprises a paper frame provided with an installation cavity, a honeycomb interlayer and a composite filter element layer are laid in the installation cavity, the honeycomb interlayer is laid at the bottom of the installation cavity, the composite filter element layer is laid on the honeycomb interlayer, the section of the composite filter element layer is in a wave shape, and hard foam is wrapped outside the paper frame. An annular frame assembly is attached between the inner wall of the mounting cavity and the outer wall of the composite filter element layer, the bottom of the annular frame assembly is in supporting fit with the honeycomb interlayer, a filter screen plate is arranged on the annular frame assembly, and a handle is arranged at the end, away from the filter screen plate, of the filter screen plate. The effects of improving the filtering performance through multi-stage filtering and conveniently replacing the filter element, the filter screen and the honeycomb interlayer are achieved.

The utility model provides a limiting structure for preventing a blood collection tube from popping up and a blood collection device. The limiting structure comprises a first limiting piece and a second limiting piece, the first limiting piece is provided with a first cylindrical body, one end of the first cylindrical body is provided with a blocking face and a limiting groove, and the limiting groove is provided with an inlet and outlet. The second limiting piece is provided with a second cylindrical body, one end of the second cylindrical body is open, the other end of the second cylindrical body is closed, and the open end is provided with a limiting piece. During blood sampling, the blood sampling sleeve is sleeved with the first limiting piece, the blood sampling tube is sleeved with the second limiting piece, the blood sampling tube is fed into the blood sampling sleeve, and the limiting piece enters the limiting groove; when the blood collection tube needs to be fixed, the limiting piece is screwed into the limiting groove from the inlet and outlet, and when limiting of the blood collection tube needs to be relieved, the limiting piece is screwed out of the limiting groove from the inlet and outlet. The limiting structure is used on the blood sampling device, the blood sampling tube and the blood sampling device can be temporarily fixed in the blood sampling process, the blood sampling tube does not need to be continuously pressed by hands in the blood sampling process, the two hands are liberated, and use is convenient.

The present invention relates to the technical field of automobile intelligent charging piles, and more specifically discloses an intelligent charging pile for new energy vehicles, including a charging pile assembly, a positioning locking assembly is installed inside the charging pile assembly, the positioning locking assembly includes a power guide assembly, a locking limit assembly is installed on the top of the power guide assembly, the charging pile assembly includes an electric pile base, and the top of the electric pile base is fixedly connected to an electric pile support column; a servo motor can lock a first gear so that the first gear no longer rotates, so that after the user completes charging, the charging gun only needs to be put into the muzzle to complete automatic locking, thereby avoiding the situation that the charging gun is not fully inserted into the charging pile positioning port after charging is completed, resulting in the charging gun failing to be locked, effectively avoiding the situation that the battery core components at the muzzle of the charging gun are exposed to the outside for a long time and oxidized, thereby ensuring the service life of the charging gun.

The invention discloses a low-temperature container static evaporation rate measuring device, and belongs to the technical field of low-temperature container detection, the low-temperature container static evaporation rate measuring device comprises a test gas circuit box body, and an adjusting plate is arranged, so that when the low-temperature container static evaporation rate is daily used through the measuring device, the low-temperature container static evaporation rate is measured through the adjusting plate; in order to improve the synchronous shielding and protecting effect on the inner walls of the air inlet pipe and the exhaust pipe when the measuring device needs to be moved, a servo motor can be turned on to drive a sliding rod to slide along the inner wall of a limiting groove through rotation of a swing rod before the device is moved, and meanwhile, a lifting rod moves through rotation of a pull rod, so that the measuring device is convenient to move. According to the air inlet pipe, the telescopic rod drives the connecting toothed plate fixedly connected with the telescopic rod to do telescopic motion, the connecting toothed plate slides to drive the adjusting plate fixedly connected with the connecting shaft to do overturning motion through connection of the connecting gear, and under the action of the sealing ring, the effect of effectively sealing and shielding the caliber of the inner wall of the air inlet pipe is achieved; and the interference of dust on measured data is reduced.