50results about How to "Consistent pressure" patented technology

The utility model discloses a doctor blade holder of a photogravure press, belongs to the technical field of doctor blade installation, and solves the problem that an existing doctor blade holder is poor in clamping effect. The doctor blade clamp comprises an installation bottom plate, a clamping plate is arranged above the installation bottom plate, a plurality of locking bolts are arranged between the clamping plate and the installation bottom plate, an installation groove used for containing a doctor blade is formed in the upper end face of the installation bottom plate, and a positioning plate used for limiting is arranged on the lower portion of the installation bottom plate. A fine adjustment device used for adjusting the pressure of the ink scraping blade on the roller is arranged on one side of the installation bottom plate and one side of the clamping plate, and collecting devices used for collecting ink are arranged on the installation bottom plate and the positioning plate. The doctor blade clamp of the photogravure press can effectively clamp a doctor blade, improves the ink scraping effect, is convenient to mount and dismount, and has the advantages of being convenient to use and high in practicability.

The invention relates to the technical field of corrosion tests, and particularly provides a corrosion fatigue coupling test device and a corrosion fatigue coupling test method for a buried pipeline. Corrosion and fatigue coupling effects suffered by the buried pipeline are simulated through the circulating pressurizing system, the fatigue loading system and the corrosion environment adjusting system, and related data of the pipeline and soil in the corrosion process are recorded through the data collecting and monitoring system. According to the invention, the test process is closer to the real service environment of the buried water supply pipeline, the temperature, humidity, pH and other parameters in the test box can be kept relatively stable, and the influence of dead load of buildings, vehicles, vibration and other live loads in the pipeline operation process is fully considered, so that the test result is more reliable and accurate, and the test efficiency is improved. Meanwhile, all the systems are controlled in a centralized mode through the controller, so that the experiment period is relatively short, the automation degree is high, operation is easy and convenient, functions are comprehensive, and the application prospect is wide.

The invention relates to the technical field of redox flow batteries, in particular to a flow battery electric pile bipolar plate and a flow battery. The flow battery stack bipolar plate comprises a bipolar plate body, the bipolar plate body is provided with more than two annular spiral grooves, each annular spiral groove forms an annular spiral flow channel, the annular spiral flow channels are used for flowing of electrolyte, the annular spiral flow channels are nested, each annular spiral flow channel is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are communicated with each other. A liquid inlet and a liquid outlet in each annular spiral flow channel are independent from each other; the annular spiral flow channels on the bipolar plate of the redox flow battery stack can be independently controlled and do not influence one another, the flowing speed, the flow and the distribution uniformity are completely kept consistent, and the performance of a redox flow battery is improved.

The invention discloses a female die ejection device of a cold header, a slidable sliding heavy punch is arranged in a female die cavity, the front end of the sliding heavy punch is fixedly connected with a punching rod, and the rear end of the sliding heavy punch is connected with an ejection pipe through an elastic connecting piece; a limiting structure is further arranged between the first female die sleeve and the sliding heavy punch and used for limiting sliding of the sliding heavy punch. The elastic connecting piece and the limiting structure enable the sliding heavy hammer to have a first state that the sliding heavy hammer slides forwards along with pushing of the ejection pipe and the elastic connecting piece; in the second state, advancing is stopped under the limitation of the limiting structure, and the elastic connecting piece continuously compresses and deforms; in the third state, the limiting structure is released from the limiting state and slides forwards; and in the fourth state, the elastic connector slides backwards under the restoring force of the elastic connector. By the adoption of the specially-designed product ejection device, the punching rod can stably eject out a product part and then retract backwards in time, transverse movement after the part is clamped by the clamp is not hindered, and the part is prevented from falling off.

The utility model relates to the technical field of steel plate machining, in particular to a correcting device for steel plate machining, which comprises two press roll components and is characterized in that the two press roll components are fixedly connected through a stand column, a power part is mounted on one side of one press roll component, a straightening component is arranged below the press roll components, and a straightening roller is arranged below the straightening component. The straightening assembly comprises a vertical plate, two straightening plates are arranged on the vertical plate, the two straightening plates are fixedly connected to a straightening power piece, and the straightening power piece is connected into a sliding groove formed in the vertical plate in a sliding mode. By arranging the straightening assembly, when a steel plate moves to the vertical plate, the second motor drives the two-way lead screw to rotate, the two-way lead screw drives the movable plates to get close to each other, and therefore the straightening plates get close to each other through the sliding columns to extrude the steel plate, and the steel plate is straightened; three groups of power pieces are arranged, so that the pressure of each part of the straightening plate on the steel plate can be kept consistent, and equipment damage caused by over-high hardness of the steel plate is avoided.

The utility model provides a PP flexible sealing pipe fitting, and belongs to the technical field of pipelines. The problem of how to improve the sealing performance is solved. The PP flexible sealing pipe fitting comprises a tubular body and a hoop detachably connected to the outside of the body, a sealing ring is arranged in the body, a limiting protruding part protruding outwards is arranged on the outer side wall of the body in the circumferential direction, a mounting groove is formed in the position, located on the inner side of the limiting protruding part, in the body in the circumferential direction, and the limiting protruding part is arranged in the mounting groove. A limiting groove is formed in the inner side wall of the hoop in the circumferential direction, the sealing ring is embedded in the installation groove, and the limiting protruding part and the sealing ring are both embedded in the limiting groove so that the hoop can be axially located on the body. The PP flexible sealing pipe fitting can ensure higher sealing performance.

The utility model relates to the technical field of spraying, and discloses a granite surface scratch-resistant wear-resistant coating spraying device which comprises a coating barrel and a moving trolley, the right end of the inner wall of the coating barrel is fixedly connected with a fixing strip, the left side of the fixing strip is fixedly connected with a motor protection shell, and the top of the inner wall of the motor protection shell is fixedly connected with a servo motor. The output end of the servo motor is fixedly connected with a rotating shaft, the outer wall of the rotating shaft is fixedly connected with a plurality of stirring shafts, the middle of the outer wall of the rotating shaft is fixedly connected with two scraping plates, the middle of the inner wall of the coating barrel is fixedly connected with a liquid separation plate, and the right side of the top end of the liquid separation plate is fixedly connected with an electromagnetic valve. According to the utility model, the servo motor drives the rotating shaft, the stirring shaft and the scraper blade to stir the coating, the electromagnetic valve accurately controls the spraying component, the stirring and heating functions are realized through cooperation of a plurality of components, the coating is prevented from being solidified, the coating is saved, the efficiency of the device is improved, and the quality is ensured.

The invention discloses a magnetic material forming device, and relates to the technical field of magnetic material forming processing, a driving assembly is used for starting before material pressing, so that a material distributing assembly is driven to intermittently move up and down within the range of a pressing mold, when a material distributing column moves downwards, the material can be slightly vibrated, and the material can be uniformly pressed. When the material distribution column moves upwards, the materials in the central area can flow towards the edge to be filled, the materials can be uniformly distributed before being pressed by repeating the process, and the material distribution efficiency is improved. Finally, the material distributing column and the pressing die are combined into a whole to fully press the materials, pressing force is evenly distributed, and therefore the forming quality of the magnetic materials is high.

The invention relates to a ceramic membrane assembly and a ceramic membrane assembly. The assembly comprises a plurality of ceramic membrane tubes and a plurality of ceramic connecting pieces, the cross section of the ceramic membrane tube is in a regular hexagon shape; a plurality of first runners are arranged in the ceramic membrane tube; the ceramic membrane tubes are divided into at least three membrane tube queues, and all the membrane tube queues are stacked to form a structural body with a hexagonal cross section; the ceramic membrane tubes in the same membrane tube queue are arranged side by side, and the outer wall surfaces of every two adjacent ceramic membrane tubes are attached to each other; every two adjacent membrane tube queues are connected and fixed through a ceramic connecting piece, and the ceramic connecting piece is attached to the outer wall of the adjacent ceramic membrane tube; and a second flow channel is arranged between every two adjacent membrane tube queues, and the second flow channels are communicated with the exterior of the structural body. The assembly is stable in structure and long in service life, the filling mode of the tubular ceramic membrane and the structure of matched parts can be simplified, the structure of the ceramic membrane assembly is optimized, and the cost is reduced.

The utility model relates to tissue embossing technical field, especially a kind of tissue embossing device, and fixing frame is provided for driving the lifting adjustment component of upper embossing roller to do lifting movement;Fixing frame is provided for driving the power component of lower embossing roller rotation;Upper embossing roller and lower embossing roller are all fixed with synchronous wheel;Two synchronous wheels are tensioned with synchronous belt;The both sides of synchronous belt are all provided with horizontal sliding seat slidingly connected on fixing frame;The both sides of horizontal sliding seat are respectively rotatably connected with roller and press wheel;The press wheel of both sides is respectively pressed in the both sides of synchronous belt;The both ends of steel cable are fixed on pull lifting adjustment component;Pull lifting adjustment component is set on the symmetry axis of two rollers;Steel cable is sleeved on the wheel body of two rollers.In using the utility model, on the basis of guaranteeing the consistent pressure of both sides of synchronous belt, the debugging difficulty of pressing device is reduced, and steel cable is convenient for overhaul, and cost is lower.

The present invention discloses a dual-cavity photoelectric control equal pressure detection device, comprising a housing, a first cavity and a second cavity are arranged in the housing, an installation area is arranged between the first cavity and the second cavity, a photoelectric component is arranged in the installation area, the photoelectric component comprises a light source transmitter, a spectrometer, a light receiver and a light processor, and the light receiver is connected to the light processor; a first piston and a second piston are slidably arranged in the first cavity and the second cavity, a grating ruler is arranged at the middle position of the first piston and the second piston, a notch is arranged on the side wall of the first cavity and the second cavity, and the light source emitted by the light source transmitter is split by the spectrometer, wherein a beam of light is irradiated on the grating ruler arranged on the first piston. The device mainly detects by photoelectricity to ensure that the pressure of the actuator cylinder I and the actuator cylinder II remains consistent during operation, and can timely alarm when the pressure is abnormal, reminding the workers to quickly troubleshoot.

The invention relates to a formation clamp of a soft package lithium ion battery. The formation clamp of the soft package lithium ion battery comprises a base body; a plurality of layers of laminating devices are arranged on the base body in the vertical direction, the laminating devices can slide up and down relative to the base body, and a bearing position for placing a soft package lithium ion battery to be formed is arranged between every two adjacent layers of laminating devices; the weight eliminating devices are connected with the laminating devices, the weight eliminating devices have upward acting force on the laminating devices so as to offset the gravity of the laminating devices, and all the laminating devices are connected with the weight eliminating devices; the pressure executing mechanism is used for applying pressure to the laminating devices, so that each layer of laminating device has preset pressure on the to-be-formed soft package lithium ion battery; and the pressure detection device is used for detecting the pressure applied to the laminating device by the pressure execution mechanism. According to the scheme, the pressure borne by the soft package lithium ion battery during formation can be more accurately controlled.

The invention discloses a CLT wood structure flexible gluing press based on wood yield strength and a pressing method. The CLT wood structure flexible gluing press comprises a hydraulic flow distribution system containing a multi-wood yield strength data set, a first hydraulic transmission assembly, a second hydraulic transmission assembly, a pressing plate and a flexible gluing pressing block. The flexible gluing pressing block comprises a fixed rod, a control rod and a pressing block; a hemispherical convex block at the bottom end of a fixing rod can rotate in a hemispherical groove of a pressing block, a pressure sensor detects the liquid pressure in a second hydraulic transmission assembly, and a controller in a hydraulic flow distribution system supplies flow to the second hydraulic transmission assembly according to the liquid pressure detected by the pressure sensor and the multi-wood yield strength. And it is guaranteed that the pressure of liquid in each second hydraulic transmission assembly is consistent, and meanwhile plastic deformation, caused by too large pressure, of the cross-laminated wood is avoided. By means of the flexible gluing pressing block, the pressing block body can be replaced more conveniently and rapidly, the daily maintenance time and cost are saved, and the phenomenon of pressure leakage can be solved.

The application provides a sensor based on structure and liquid medium coupling and a working method thereof, and belongs to the technical field of sensors. The sensor comprises an elastic element with an inner cavity, the side of the inner cavity of the elastic element is provided with a MEMS chip, one end of the MEMS chip is connected with a signal line, the other end of the signal line is connected with an external signal receiving device through the elastic element, the inner cavity is filled with a pressure guiding liquid, and the pressure guiding liquid is in contact with a pressure sensing diaphragm of the MEMS chip. The pressure guiding liquid is used for nearly lossless pressure transmission, the pressure acting on the pressure sensing diaphragm of the MEMS is highly consistent with the external pressure, the hysteresis and friction loss of traditional mechanical transmission are avoided, precise and rapid signal sensing is realized, a full-sealed unit is formed through welding and other processes, the internal pressure guiding liquid is not exchanged with the outside, and the stability of the sensor under harsh working conditions such as humidity, oil dirt and high temperature is greatly improved.

The utility model provides a three-dimensional (3D) floating turntable structure which comprises a driving gear, a driven gear, a turntable seat, a turntable cover and massage balls, the driving gear is meshed with the driven gear; the driven gear is provided with a butt joint seat, the butt joint seat is provided with a limiting sliding groove opening formed in an up-down extending mode, and the butt joint seat is in limiting movable fit with the rotating disc seat through the limiting sliding groove opening in a direct or indirect connecting mode; the turntable cover is mounted on the turntable seat, a mounting slot is formed between the turntable cover and the turntable seat, and massage balls are mounted in the slot; the rotating disc seat drives the rotating disc cover and the massage balls to rotate in the horizontal direction under the cooperation of the driving gear and the driven gear, and meanwhile drives the rotating disc cover and the massage balls to float up and down under the cooperation of the butt joint seat. The utility model provides a foot bath device comprising the 3D floating turntable structure. According to the utility model, the turntable seat and the driven gear are designed to be in a limiting movable fit mode, so that the turntable seat not only can move horizontally, but also can float up and down in the vertical direction, and even can float in a 3D manner.

This invention relates to a coating device for a winding machine, comprising a fixed plate and several coating units. The fixed plate has a through hole in its center for a sample to pass through. The coating units are evenly arranged along the outer circumference of the through hole and are movably connected to the fixed plate. Each coating unit has a cutting part for cutting the wire end and a pressure sensor for detecting the coating pressure. A heating unit for heating the sample surface is provided on the fixed plate on one side of each coating unit. The advantages of this invention are: by using pressure sensors on the coating units to detect the coating pressure in real time, the position of the coating units can be adjusted according to the pressure signal, thereby ensuring that the pressure remains consistent throughout the coating process, avoiding excessive coating pressure that could damage the sample, improving the uniformity of the coating layer, and reducing the scrap rate. Furthermore, this invention also provides a winding machine including the aforementioned coating device.

The utility model discloses a textile color fastness testing arrangement relates to color fastness testing arrangement technical field, and its technical scheme is: including frame component, be equipped with test drive assembly in frame component, test drive assembly top is equipped with test movable assembly, frame component top is equipped with test pressure assembly, and the beneficial effect of a kind of textile color fastness testing arrangement is: through electric push rod in test pressure assembly provides controllable driving force, cooperate pressure sensor and pressure display to realize the real -time monitoring and accurate adjustment of friction pressure, replace traditional pressure plate deadweight pressure mode, effectively avoid the pressure fluctuation caused by mechanical vibration, sample surface unevenness etc., ensure that actual friction pressure is consistent with preset value, greatly improve the accuracy and repeatability of test result, simultaneously, operator can adjust pressure value according to different textile types quickly, need not to replace pressure plate, and operation efficiency is significantly improved.

The utility model relates to a wafer suction cup based on the Bernoulli principle, and belongs to the technical field of wafer production equipment. In the wafer suction cup based on the Bernoulli principle, the annular groove of the rotating disc and the annular sealing ring on the framework form an annular air channel together, and air flows out from the air channel, passes through the middle ventilation column, the ventilation pipe and the annular groove and flows out from the air spraying opening. A middle ventilation column, a ventilation pipe, an annular groove and an air spraying opening can guarantee that the cross sectional areas of the air channels are consistent only by guaranteeing the machining precision, and the pressure of air sprayed out of the whole rotating disc is consistent. Gas is limited in the components, so that liquid can be prevented from being sucked back to corrode other components. Meanwhile, the middle ventilation column, the ventilation pipe and the annular groove are of a flat structure, and the overall height of the suction cup is reduced. Moreover, the framework is arranged to fix the annular sealing ring and the breather pipe in a matched mode, so that overall assembly is convenient, and component position positioning is accurate.

The utility model discloses a mask taking auxiliary mechanism for mask cloth, which comprises a mask lifting mechanism and at least one mounting pressure ring, and the mask lifting mechanism comprises a lifting mounting seat and a lifting cylinder arranged on the lifting mounting seat; the installation pressing rings are arranged above the lifting installation base, each installation pressing ring is provided with a detection calibration block, a photoelectric sensor is arranged above each detection calibration block through a support, and a plurality of brush assemblies are evenly distributed on the upper end face of each installation pressing ring; an upper magnet is arranged near each brush assembly; a lower magnet is arranged under each upper magnet, and each lower magnet is arranged on the lifting installation base through a linear bearing. According to the mask taking auxiliary mechanism for the mask cloth, it can be guaranteed that the mask cloth is flat in the mask taking process of the stacked mask cloth, it is guaranteed that the heights of the stacked mask cloth are kept consistent when the mask taking tail end executor grabs the mask cloth, and therefore the success rate that the mask taking tail end executor grabs the mask cloth is increased.

The invention relates to a building water supply and drainage pipeline supporting and hanging device which comprises a pressing ring, a supporting base provided with a hanging frame on the two sides of a base and a fastening bolt and further comprises an adjusting assembly arranged on the supporting base and a locking assembly arranged on the pressing ring, the adjusting assembly comprises a bearing cylinder embedded into the inner ring face of the supporting base, and a bearing plate is arranged in the bearing cylinder in an airtight fit mode. A bearing rod which penetrates through the bearing cylinder and the supporting seat and is connected with the bearing pulley seat is arranged on the bearing plate, an adjusting cylinder is further arranged on one side of a base of the supporting seat, and an adjusting plate is arranged in the adjusting cylinder in an airtight matching mode; the bearing cylinder and the adjusting cylinder are in airtight communication through a first arc pipe, the bottom end of the adjusting plate is connected with the end, penetrating into the adjusting cylinder, of the U-shaped rod, and the other end of the U-shaped rod abuts against the bottom end of the fastening bolt. Structural optimization and improvement are carried out on an existing pipeline supporting and hanging frame, the pipeline can be rapidly erected, installed, adjusted and fixed, overall operation is convenient and fast, and the working efficiency can be effectively improved.

The utility model relates to the technical field of structural engineering, and discloses a beam lock catch capable of being quickly stabilized and reinforced, which comprises a positioning plate, a clamping plate used for preventing a template from deforming is clamped on one side of the positioning plate, and a fastening buckle used for limiting the position is arranged on one side of the clamping plate. A reinforcing rod used for keeping the same pressure is fixedly installed on the top of the positioning plate, and a rib plate used for preventing sliding is fixedly installed on one side of the positioning plate. According to the beam fastening buckle capable of being rapidly and stably reinforced, through cooperative arrangement of the positioning plate and the clamping plate, the device can protect a concrete formwork during use, the situation that the concrete formwork is damaged during fastening and cannot be used again is prevented, the positioning plate is arranged, the position of the clamping plate can be limited, the clamping plate is arranged, and the clamping plate is arranged, so that the fixing effect is good. And pressure can be applied to the concrete formwork, deformation of the formwork due to concrete pouring is avoided, meanwhile, the device is better attached to the formwork, and the protection performance of the device in the using process is improved.

The utility model discloses a winding compression roller device with an adjusting function, and belongs to the technical field of industrial production. The device comprises a main frame, a compression roller swing arm and a compression roller, the two compression roller swing arms are arranged in parallel; one end of each pressing roller swing arm is hinged to the main frame, and the two ends of each pressing roller are connected to the tail ends of the corresponding pressing roller swing arms through corresponding adjusting structures; the compression roller swing arm is provided with a square slotted hole right opposite to the end part of the compression roller, and the adjusting structure is positioned in the corresponding square slotted hole and comprises a screw, a rectangular spring and an embedded universal ball; the tail end of a compression roller shaft of the compression roller is positioned in the square slotted hole; a screw penetrates through the compression roller shaft positioned in the square slotted hole from top to bottom from the top of the compression roller swing arm; the two rectangular springs sleeve the pressing roller shaft and are respectively positioned on the upper side and the lower side of the pressing roller shaft; the two embedded universal balls are installed on the left inner wall and the right side wall of the square groove hole, and the ball ends of the two embedded universal balls abut against the two sides of the pressing roller shaft. According to the utility model, the pressure applied to the pole piece by the compression roller is proper and consistent, so that the pole piece is tidier and denser in the winding process.

The ultrathin sheet combined injection mold comprises an upper fixing plate and a lower fixing plate, a sprue is formed in the upper fixing plate, the lower portion of the upper fixing plate is connected with a shunting positioning block, the sprue is communicated with a shunting plate, the shunting plate is located in the shunting positioning block, and the shunting plate is communicated with at least two groups of shunting glue injection pipes; the die further comprises an upper die plate and a lower die plate, the lower die plate is located on the lower fixing plate, and a die cavity is formed between the upper die plate and the lower die plate. According to the scheme, uniform pressure relief holes are formed in the inner periphery of the mold cavity, it is guaranteed that the pressure in the mold cavity is uniform during glue injection, sheet deformation caused by the pressure on a metal sheet in the mold cavity is reduced, a product can be positioned through the arranged sheet positioning needle, and the pressing force is guaranteed through the sensor; ejection of an ejector plate is omitted, the product can be demolded by slightly pushing the sheet positioning needle for pressing the product, the problem of deformation of the ejected product is solved, and the injection molding qualification rate is improved.

The utility model belongs to the technical field of chemical equipment, and relates to a sulfur dioxide oxidation sulfuric acid catalyst original granularity activity test device which is characterized by comprising a sulfur dioxide conversion system and a sulfur dioxide analysis system, the sulfur dioxide conversion system comprises a gas generation device and a gas absorption device which are sequentially connected with a raw material gas source; the gas generating device comprises an air compressor, a flow regulating valve and a rotor flow meter. The reactor has the advantages of being small in size, low in raw material gas consumption, small in catalyst filling amount, convenient to load and unload and the like, the unique design can effectively ensure that the temperature, the pressure and the airspeed of each reaction tube are kept consistent, the converter has good reproducibility, the working efficiency is greatly improved, and the labor cost and the waste of the raw material gas are reduced.

The invention relates to the technical field of water body sampling, and discloses a water body stratified sampling device for water quality detection, the water body stratified sampling device comprises a support column, the top of the support column is fixedly connected with a fixing ring, one end, far away from the support column, of the fixing ring is fixedly connected with a shell, and the outer wall of the shell is fixedly connected with a fixing block; the fixing block is fixedly connected with the fixing ring, the end, away from the fixing ring, of the supporting column is rotationally connected with a fixing assembly, a telescopic rod is arranged in the shell and fixedly connected with the top of the shell, and the bottom of the telescopic rod is fixedly connected with a fixing rod. The end, away from the telescopic rod, of the fixing rod is fixedly connected with a connecting rope, and the end, away from the fixing rod, of the connecting rope is fixedly connected with a traction ball, so that water bodies with three different depths can be sampled at the same time, the working efficiency of equipment is improved, the impact resistance of the sampling pipe is improved, and the sampling pipe is prevented from inclining in the sampling process; the sampling precision is improved.

The utility model belongs to the technical field of electronic detonator performance testing, and particularly discloses an electronic detonator bending resistance testing device which comprises a table top, a side plate is vertically and fixedly arranged on the upper side of the table top, a first motor is fixedly arranged on one side of the side plate, and the output end of the first motor penetrates through the side plate and then is coaxially and fixedly provided with a gear which is tightly attached to the other side of the side plate. The side plate is rotatably provided with a rotating ring in a penetrating mode above the first motor, the rotating ring is coaxially and fixedly provided with an outer gear ring on one side of the side plate, the outer gear ring is in meshed connection with the gear, the other side of the rotating ring is coaxially and fixedly provided with a clamping ring tightly attached to the side plate, the outer gear ring is coaxially provided with a radial linkage positioning mechanism, and a sliding rail is fixedly arranged on the edge of the upper side of the table top in the direction perpendicular to the side plate; a sliding plate is slidably clamped in the sliding rail, and a non-contact magnetic pressure mechanism is arranged on the upper portion of the sliding plate. According to the utility model, the requirement of multi-direction detection can be met, the detection efficiency is improved, the operation process is simplified, the pressure applying mechanism adopts non-contact pressure applying, the pressure applying is continuous and controllable, and the accuracy is improved.

The invention discloses a nozzle core and nozzle cap assembling structure which comprises a nozzle core and a nozzle cap, the nozzle cap is coaxially assembled on the nozzle core, a nozzle is formed in the top end of the nozzle core, a plurality of obliquely-distributed first through holes are formed in the arc face, close to the nozzle core, of the lower portion of an inner cavity, and the first through holes are low in the outer portion and high in the inner portion. A plurality of second through holes are formed in the cylindrical surface below the nozzle core, the nozzle core and the nozzle cap are assembled to form a plastic steering cavity, and the plastic steering cavity is communicated with the first through holes and the second through holes respectively. The nozzle core and the nozzle cap which are coaxially assembled are adopted, the plastic steering cavity is formed between the nozzle core and the nozzle cap, and plastic enters from the nozzle core, then enters the plastic steering cavity formed between the nozzle cap and the outer wall of the nozzle core from the first through hole and finally enters the nozzle core from the second through hole in the nozzle core, so that the plastic is mixed in the transverse direction; and finally, the pressure of the plastic is consistent, the problems of pressure difference and speed difference of the plastic are solved, and the problem of fusion lines in the prior art is solved.

The utility model relates to a blowpipe for forming an air curtain, and belongs to the technical field of devices for air curtains. A blowpipe for forming an air curtain comprises a blowpipe body provided with an air outlet, and is characterized in that a duckbilled structure is mounted on the pipe wall of the blowpipe body; the duckbilled structure comprises an upper plate, a lower plate, a front plate and sealing plates at the two ends, the upper plate, the lower plate and the front plate are spliced in a trapezoidal structure, and an air curtain air opening is formed in the front plate; flow guide plates are mounted at the splicing part of the upper plate and the front plate and the splicing part of the lower plate and the front plate; a wind shielding plate is arranged at the air outlet and located in the air blowing pipe body, and the wind shielding plate is fixed to the inner wall of the air blowing pipe body through a supporting plate. The blowpipe designed by the utility model has the advantages of stable strength of a formed air curtain and long distance.

The utility model relates to a fixed circulating pool sampling device, including sampling pump, main pipeline, pool insertion pipe and connecting pipe, one end of main pipeline is detachably connected with one end of connecting pipe and communicates, and the other end of connecting pipe communicates with the inlet of sampling pump, one end of pool insertion pipe is detachably connected with the other end of main pipeline and communicates, and the other end is used for inserting into sampling pool, the vent line is communicated on main pipeline, and the vent valve is fixedly installed on the vent line. The utility model has the advantages of simple structure, reasonable design, can realize the quick automatic sampling of circulating pool, is convenient for sampling, does not need artificial to lie on the edge of circulating pool and sample, and is simple and safe and reliable to operate.

The utility model belongs to the technical field of air cylinders, and particularly relates to a sealing structure of an air cylinder piston, which comprises a piston, the piston is arranged in a cylinder body in a sliding manner, two groups of sealing grooves are oppositely arranged on the circumferential surface of the piston, inflatable rubber rings are fixedly arranged in the sealing grooves, and a Y-shaped sealing ring is fixedly arranged on one side of each inflatable rubber ring. The Y-shaped sealing ring is arranged in the sealing groove in a sliding mode, a plurality of sets of air channels are formed in the two sides of the piston, air inlet plates are fixedly arranged in the air channels, fixing frames are fixedly arranged in the air channels, movable rods are arranged on the fixing frames in a sliding and penetrating mode, plugs are fixedly arranged at the ends, close to the air inlet plates, of the movable rods, and air inlet holes are formed in the air inlet plates. Through the cooperation of the structure, the pressure applied to the Y-shaped sealing ring by the inflatable rubber ring is uniform, the pressure applied to the inner wall of the cylinder body at each position of the Y-shaped sealing ring is consistent, the sealing effect of the piston is improved, and normal work of the cylinder is guaranteed.