1160 results about "Internal cavity" patented technology

The invention relates to the technical field of oil and gas well completion sand prevention, in particular to a sand blasting perforation and sand prevention integrated combined operation device and a construction method. According to the technical scheme, a central pipe is installed in the center of an inner cavity of a jet pump assembly, the lower end of the central pipe extends out of the jet pump assembly, a liquid suction opening is formed in the lower middle portion of the jet pump assembly, a liquid outlet is formed in the outer wall of an upper connector, and a mixing cavity and a diffusion cavity are formed between the jet pump assembly above the liquid suction opening and the central pipe. An outlet of the diffusion cavity is communicated with the liquid outlet; the inner side of the central pipe is movably connected with a lower sliding sleeve; a nozzle is mounted on the jet pump assembly outside the lower flow transfer hole; and the inner side of the upper flow transfer hole of the central pipe is movably connected with a middle sliding sleeve. The method has the beneficial effects that the three processes of sand blasting perforation, blockage removal after perforation and ground filling sand prevention are completed by tripping in the tubular column once, so that the times of tripping the tubular column and using ground construction equipment are reduced, the construction efficiency is improved, the construction cost is saved, and the well control risk in the construction process is reduced.

The invention discloses a permeable hinged type ecological slope protection structure for sheltering benthonic animals in a canal. The permeable hinged type ecological slope protection structure is formed by distributing a plurality of slope protection blocks on a bank slope in an array mode. The slope protection block body is of an integrated structure and comprises an upper halfpace section and a lower rectangular enclosure frame section. An inner cavity of the slope protection block body is formed by a space enclosed by the lower rectangular enclosure frame section and a halfpace-shaped cavity in the upper halfpace section; lateral channels communicating with the inner cavity are formed in the left side and the right side of the slope protection block body, and the lateral channels on the two sides directly face each other. Through holes communicated with the inner cavity are formed in the top surface, the front side surface and the rear side surface of the upper halfpace section; the front side and the rear side of the lower rectangular enclosure frame section are respectively provided with a linkage hinge bayonet and a linkage hinge clamping block which are matched with each other; an induction adhesion layer is arranged on the top surface of the upper halfpace section; in the shoreline direction, the lateral channels of the adjacent slope protection block bodies are aligned and communicated; the adjacent slope protection blocks are clamped and matched in the direction perpendicular to the shoreline. According to the method, a relatively stable near-bottom shielding and slow-flow sheltering space can be formed, and habitat communication and attachment induction interface construction are considered.

The invention discloses a basket mechanism and a biological sample storage device. The basket mechanism comprises a heat preservation box body, a transmission assembly, a basket hook and a driving motor. The heat preservation box body comprises a shell, a sealing door and a heat preservation gas conveying piece. The shell is hollow and provided with a bottom end opening. The sealing door is slidably mounted at the bottom of the shell; the heat preservation gas conveying piece is arranged on one side of an inner cavity of the shell, communicates with a gas source of heat preservation gas and is provided with a plurality of micropores. The transmission assembly is arranged on the other side of the inner cavity of the shell, the side, facing the heat preservation gas conveying piece, of the transmission assembly is connected with the basket hook, and a basket channel is formed between the transmission assembly and the heat preservation gas conveying piece and communicates with the bottom end opening. The output end of the driving motor is connected with the transmission assembly. By means of the arrangement, in the process that the basket mechanism is transferred or taken out, heat preservation operation can be automatically conducted on a sample tube, global low-temperature operation does not need to be conducted on a biological sample library, the speed is increased, and waste of refrigeration resources such as liquid nitrogen is avoided.

The invention relates to the technical field of animal experiment equipment, and discloses an isolated culture device for mouse sweet water preference test in an IVC cage, which comprises a shell cover, the partition plate is fixedly installed on the inner side wall of the shell cover, and an inner cavity of the shell cover is divided into a living area and a functional area through the partition plate; the sliding cover is arranged in the living area of the shell cover and used for containing solid feed, and multiple sets of feeding trough openings which are arranged at equal intervals are formed in the bottom of the sliding cover; according to the device, an innovative cage-in-cage design is adopted, a single cage is converted into a plurality of independent experiment units on the premise that an existing IVC system is not changed, and cage position resources are greatly saved. The functions of isolation, double-bottle water drinking and independent feeding are integrated, and convenient operation is achieved through the pull-out type fixing plate and the sliding cover plate. The centrifugal tube is adopted to replace a special water bottle, so that the cost is reduced, the SPF environment is kept in the whole process, data accuracy and reliability are ensured, and the traditional SPT test problem is effectively solved.

A fastening clip assembly is provided. It comprises a fastening clip, with a head portion to be positioned against a first surface of a component and a body portion for extending through the hole in the component, the body portion comprising an internal cavity and one or more elastically deflectable retaining members extending out of the internal cavity to engage a second surface of the component, opposite to the first surface, to retain the fastening clip assembly in the hole of the component, and an insert, configured to be inserted through an opening in the head portion of the fastening clip and into the internal cavity. The elastically deflectable retaining members are adapted to deflect inwardly in a deflecting direction as the body portion is pushed through the hole, and the insert comprises an engaging surface to engage an end of one of the elastically deflectable retaining members within the internal cavity, the end of the elastically deflectable retaining member comprising a bent section.

The application discloses a metal soluble sealing assembly and a horizontal well staged fracturing process. The metal soluble sealing assembly comprises a connecting body, a releasing hand (12) arranged at the lower end of the connecting body, a necking portion and an inner cavity of the releasing hand, and the inner cavity contains a dissolving agent (13). A setting mechanism is arranged axially along the connecting body. After the setting mechanism is set in a casing (20), the thickness between the cross section of the releasing hand (12) cut from the necking portion (12-1) and the inner cavity is smaller than the wall thickness of other parts of the inner cavity. The problems that the existing bridge plug cannot simultaneously consider the pressure-bearing capacity and the dissolving rate in some special cases and the problem that the dissolving rate adjustment is limited for different working conditions are solved.

The invention discloses a safe cleaning device for jellyfish food, and relates to the technical field of jellyfish cleaning and processing equipment.The safe cleaning device comprises a box cover arranged on the upper portion of a machine box, four cleaning cylinders which are symmetrically distributed are arranged in an inner cavity of the machine box, and a top frame penetrating through the two ends of the box cover is installed at the top of the machine box; the hydraulic telescopic rod drives the lifting rod to lift. According to the safe cleaning device for the jellyfish food, jellyfishes of different sizes are sorted and separated through the sorting plate driven by shaking of the cleaning cylinder, so that the jellyfishes of different sizes are located at different end positions of the cleaning cylinder, a door plate is driven by a closing mechanism to conduct automatic blocking, and then a vortex driving mechanism and a second paddle are driven to stir water flow; according to the jellyfish cleaning device, the jellyfish with the large size can be cleaned in different zones to form eddy currents, the jellyfish with the large size can be impacted by water flow, the different zones have different cleaning strengths, and the cleaning efficiency of the jellyfish with the large size can be improved on the basis that the jellyfish with the small size is prevented from being damaged.

The utility model provides a stirring mechanism for a fermentation tank body, which belongs to the technical field of fermentation tanks and comprises a tank body and a stirring component arranged in the tank body, the stirring component comprises a stirring frame rotationally connected to the upper end of an inner cavity of the tank body, and the lower end of the stirring frame extends into a discharge pipe at the lower end of the tank body. A plurality of annularly distributed blades are arranged on the outer arc surface, located in the discharging pipe at the lower end of the tank body, of the stirring frame, a motor is arranged at the upper end of the tank body, an output shaft of the motor is fixedly connected with the stirring frame, and a scraping assembly used for scraping the inner wall of the tank body is further arranged in the tank body. The stirring mechanism, the scraping component and the transmission component are coordinated and matched, so that materials are prevented from being hung on the wall to influence the heat exchange efficiency of the fermentation tank, the materials hung on the wall are prevented from becoming a growth place of infectious microbes, the risk of bacterial contamination in the production process is reduced, and meanwhile, the problem that the scraping plate is excessively abraded due to the fact that the scraping component always synchronously rotates along with the stirring frame is solved.

The invention provides a bending device and method for a coiled pipe of a heat exchanger, the coiled pipe of the heat exchanger is decomposed, and the whole structure is decomposed into a body spiral part and bent parts at the two ends; a spiral bending device is designed, and the spiral part of the coiled pipe body is bent; a pipe end bending device is designed, and the pipe end part of the coiled pipe is bent; the spiral bending device comprises a pipe bending unit, an inlet and outlet angle control unit and a screw pitch control unit, the pipe bending unit is used for bending the spiral part of the coiled pipe body, the inlet and outlet angle control unit is used for controlling the forming angles of the bent parts at the two ends of the coiled pipe, and the screw pitch control unit is used for controlling the screw pitch of the spiral part of the coiled pipe body. The bending device is adopted to solve the problems that heat exchanger coiled pipes of different specifications, pipe types and lengths are difficult to form, filler in an inner cavity is difficult to clean, the manufacturing test period of a special mold is long, and the forming precision of the coiled pipes is poor.

The invention relates to the technical field of medical instruments, in particular to an ice stimulation training device for dysphagia rehabilitation, which comprises a box body with an upward opening, a cover plate arranged at the opening of the top of the box body, two partition plates arranged in an internal cavity at an interval up and down, and an auxiliary opening mechanism arranged in a training opening in the front side of the box body and used for opening the box body. An ice stimulation training head is arranged in the ice stimulation training device, the tail of the ice stimulation training head is connected with a control mechanism, and a pneumatic assembly is arranged on the left side of the top of the partition plate on the upper side and connected with the auxiliary opening mechanism through an air pressure rod assembly. The problems that in the prior art, an ice stimulation training device for rehabilitation of the stroke dysphagia generally can only achieve single ice stimulation treatment and lacks auxiliary taste stimulation and vibration stimulation for comprehensive treatment, so that the whole treatment process is long in time, more complex and free of cooperation, and the treatment cost is low are solved. Meanwhile, the compliance of the patient and the recognition degree of treatment are also reduced, and the patient cannot recover as soon as possible.

The utility model relates to the technical field of pet bathing, and discloses a spraying structure suitable for pet bathing, which comprises a machine body, an inner cavity for accommodating a pet is arranged in the machine body, and a plurality of liquid sprayers for spraying mixed liquid into the inner cavity and a plurality of water sprayers for spraying clear water into the inner cavity are arranged on the machine body; the plurality of liquid nozzles and the plurality of water nozzles are respectively exposed in the inner cavity and are arranged in a mixed and staggered manner; according to the spraying structure suitable for pet bathing, a pet is placed in the inner cavity, the liquid sprayers spray mixed liquid on the pet body, meanwhile, clean water sprayed by the water sprayers is used for cleaning the pet, automatic bathing of the pet can be achieved, the mixed liquid and the clean water are added in the bathing process, and therefore the pet can be washed conveniently. A pet can be better bathed, and the cleaning effect is better.

The invention discloses an inhalation administration device and a design method, and mainly relates to the technical field of medical instruments. The device comprises a capsule base, a capsule body, a capsule cabin and a suction nozzle, an inner cavity of the suction nozzle is of an inverted trapezoid structure, and in other words, the diameter of the section is increased by 0.033 mm every time the inner area of the suction nozzle is raised by 1 mm from the bottom end to the top end. According to the design, by optimizing the internal flow field of the suction nozzle, the dispersity of medicine particles can be remarkably improved, wall surface deposition is reduced, and therefore the dispersity of the medicine particles and the lung deposition efficiency are improved. The invention also provides a design method based on lattice Boltzmann method-immersion boundary method-large eddy simulation multi-physics field coupling numerical simulation, and by setting specific performance evaluation parameters, the structure optimization of the inverted trapezoidal suction nozzle can be efficiently and accurately guided. An in-vitro deposition test shows that the performance of the device is superior to or equivalent to that of a commercially available product.

The invention relates to the technical field of heat exchangers, and discloses a shell-and-tube condenser capable of automatically removing a liquid film, which comprises a shell, one end of the shell is provided with a cold water inlet, the other end of the shell is provided with a cold water outlet, the upper end of the shell is provided with an air inlet, and the lower end of the shell is connected with a liquid outlet pipe; a plurality of air uniformizing holes are formed in the air uniformizing cover, the air uniformizing cover divides an inner cavity of the shell into a first cavity body and a second cavity body, a second finned tube is arranged in the first cavity body, a first finned tube is arranged in the second cavity body, and liquid guide fins are arranged on the outer wall of the first finned tube. The finned tube I is arranged, and the liquid guide fins are additionally arranged on the finned tube I, so that the continuity of a liquid film is actively destroyed, the liquid film does not accumulate and grow outside the tube, but accumulates in the liquid guide fins to drop in a liquid drop form, and the problem of thermal resistance caused by liquid film coverage is effectively solved; and the heat transfer efficiency of the whole equipment is obviously improved.

The present disclosure relates to a cleaning device, comprising: a machine body, a cleaning device and a driving device, the cleaning device being configured to rotate relative to the machine body to clean a cleaning surface; the cleaning device having an inner cavity; the driving device being connected to the machine body and having a heat dissipation air duct; the driving device being configured to extend into the inner cavity of the cleaning device and be in driving cooperation with the cleaning device; external airflow being configured to enter the heat dissipation air duct from a connection end of the driving device and the machine body and enter the inner cavity of the cleaning device through the heat dissipation air duct. The cleaning device of the present disclosure can use the airflow after heat dissipation to dry the inside of the cleaning device, avoiding the breeding of bacteria.

The flow-adjustable perfusion balloon catheter comprises a catheter body, a balloon capable of being filled and a catheter base, a push rod channel and a filling channel are arranged in the catheter body, the filling channel is communicated with an inner cavity of the balloon, and a first connector and a second connector are arranged on the catheter base. Micropores are formed in the positions, located at the near end and the far end of the balloon, of the catheter body and are the near-end micropore and the far-end micropore respectively, the near-end micropore and the far-end micropore are communicated through a blood flow channel formed in the catheter body, and a blocking piece capable of blocking the near-end micropore or the far-end micropore is arranged in the blood flow channel. A push rod is arranged in the push rod channel, and the far end of the push rod is connected with the near end of the plugging piece. Compared with the prior art, by arranging the blood flow channel, effective circulation of blood flow can still be achieved after balloon plugging in the operation, complications caused by ischemia or hypertension in the operation are avoided, the perfusion blood flow can be adjusted in time according to different patient conditions, and the success rate of the operation is increased.

The utility model discloses a novel hollow bone taking drill, handle end, handle end side fixed connection's bone taking end, bone taking end outer extension end fixed connection's working end: working end, including bone taking end side fixed connection's cutting ring, the drill bit mouth of cutting ring bottom end setting, four groups of side edges that cutting ring outer wall has set up, are used for draining cooling water to working end, can be through the spiral side edge and the recess that set up in working end side wall, drain cooling water high efficiency to entire cutting surface, improve the heat dissipation effect significantly, avoid the burn of tissue, simultaneously, side edge auxiliary end blade mouth carries out cutting, has greatly promoted the cutting efficiency, the annular step of bone taking end internal cavity setting, forms the slight gap after the bone column enters, effectively avoids the vacuum adsorption, makes the bone column be taken out easily and completely, thereby realized safe, efficient, convenient bone taking operation.

The invention discloses a drug delivery device in a human body cavity, which comprises an inflatable balloon, at least one part of the outer wall of the balloon is provided with a protective shell, the balloon is provided with an inner cavity, and the protective shell can be dissolved by specific body fluid in the human body cavity; the triggering part is arranged in an inner cavity of the balloon, and the triggering part can react with body fluid to generate fluid to inflate the balloon when making contact with the body fluid, so that the inflated balloon is tightly attached to the wall of a body cavity; the propelling part is arranged in the inner cavity of the balloon and comprises a tissue penetrating component, and the triggering part can generate power to propel the tissue penetrating component; and the containing part is used for containing a medicine preparation, and the triggering part can push and press the liquid medicine preparation contained in the containing part into the pushing part after the balloon is inflated, and injects the liquid medicine preparation into the inner wall tissue of the human body cavity through the tissue penetrating component. By means of the device, macromolecular drugs or preparations can be injected into the inner wall of the human body cavity, such as the tissue of the intestinal wall.

The application discloses an abnormal wear monitoring device for a hydraulic pump. The device comprises a screw sleeve, an internal cavity of the screw sleeve is sequentially provided with a screw plug, a magnetic element and a spring assembly in the axial direction, the internal cavity wall of the screw sleeve is provided with a taper angle theta in the axial direction, and an oil passage window is arranged on the cavity wall in the circumferential direction; the top end of the magnetic element is fixedly connected with the screw plug, and the bottom end is abutted with the spring assembly; when the screw plug is inserted into the screw sleeve, the magnetic element is positionally corresponding to the oil passage window in the axial direction of the screw sleeve; when the screw plug is pulled out of the screw sleeve, the magnetic element is pulled out together, meanwhile, the spring of the spring assembly is elongated to lift the spring seat of the spring assembly in the axial direction of the screw sleeve, and the spring seat is clamped in the internal cavity of the screw sleeve due to the taper angle theta, so that the oil passage window is sealed and isolated from the outside. The application can timely find the iron-based wear-out objects in the pump cavity of the hydraulic pump, so as to judge the wear degree and whether abnormal wear occurs in the hydraulic pump, and has important significance for early health monitoring and maintenance of the hydraulic pump and improvement of the performance and service life of the hydraulic pump.

The utility model provides a synchronous moving mechanism, a side position head clamp assembly comprising the synchronous moving mechanism and an oral cavity CBCT, and belongs to the technical field of CBCT side position head clamps, the synchronous moving mechanism comprises a base body, a rotating rod rotationally arranged in the length direction of an inner cavity of the base body, and two connecting shafts arranged at the end of the rotating rod in a threaded mode and connected with the base body in a sliding mode, any connecting shaft can synchronously drive the other connecting shaft to move in the opposite direction or the reverse direction when moving in the axial direction of the rotating rod, the rotating rod comprises two rod bodies fixedly connected end to end, the connecting portion of the two rod bodies is rotationally arranged in an inner cavity of a base body through a bearing, and the base body is of a cuboid structure internally provided with a cavity. A mounting groove matched with the bearing is formed in the middle of the cavity of the base body; by means of the connection mode that the base body, the rotating rod and the connecting shaft are tightly matched, the connecting device has the advantages of being compact in structure, high in space utilization rate and low in manufacturing and installing cost, lubricating oil only needs to be smeared regularly during later maintenance, and maintenance is convenient.

A lock comprising a housing, a plunger, a locking member, a locking plate, and a control assembly. The housing having an internal cavity, a recess, and a bore. The plunger is disposed in the bore and is slidable between a closed position wherein a second end of the plunger is positioned in the internal cavity and an intermediate portion of the plunger extends across the recess, and an open position wherein the plunger is withdrawn from the internal cavity and the recess. The locking member is movable between a locking position wherein the locking member is engaged with the plunger and an unlocking position wherein the locking member is disengaged therefrom. The control assembly operates the locking plate between a lock position to hold the locking member in the locking position and an unlock position to permit the plunger to move from the closed position to the open position.

The invention discloses a double-cavity clamping type bottle injection pen which is characterized in that a lower shell wraps the outer part of a double-cavity injection tube, and the upper part of the double-cavity injection tube is communicated with an injection push rod in the vertical direction; a first piston and a second piston are arranged in an inner cavity of the double-cavity injection tube, so that a first cavity is formed by the first piston and the bottom of the double-cavity injection tube, and a powder medicament or a liquid medicament A is contained in the first cavity; a closed second cavity is formed in the inner cavity of the double-cavity injection tube between the first piston and the second piston, and a liquid medicament B is contained in the second cavity; a communication bridge protruding outwards is arranged on the inner wall of the double-cavity injection tube, the first cavity and the second cavity can be communicated through the communication bridge by pushing the first piston and the second piston to move, and mixing of the medicine liquid B and the powder medicine or the liquid medicine A is achieved. Through the modular design, the double-cavity medicament injection function which is compact in structure and easy and convenient to operate is achieved, and the device is particularly suitable for biological agent or vaccine injection scenes needing on-site mixing.

The present invention provides a gas inhalation device with a constant concentration of gas entering the respiratory tract and without respiratory resistance, including: a mask, a gas source and a gas mixer, wherein the mask is a container that is capable of holding 50-1000 ml of gas, a proximal end of the mask is a soft cushion for fitting the face and surrounded by a catheter, the catheter is provided with a plurality of small orifices communicating with an inner cavity of the mask, one end of the catheter is connected to one end of an adapter tube, the other end of the adapter tube is connected to a gas delivery pipe, the gas delivery pipe is a catheter connecting the adapter tube and the gas source or the gas mixer; a distal end of the mask is provided with a huge orifice or a plurality of large orifices to ensure unobstructed gas in and out, with almost no airflow resistance, and an internal pressure of the mask cavity is always zero; one or two headband interfaces are provided on both sides of the mask's outer layer for connecting a headband fixing the mask to ensure that the mask is stably fixed on the face.

The utility model relates to a peritoneal dialysis tube disinfection device which comprises a disinfection tank and a tank cover detachably connected with the disinfection tank, the tank cover is provided with a tube placing hole allowing a tube body of a peritoneal dialysis tube connected with a human body to penetrate through, so that a first end, far away from the human body, of the peritoneal dialysis tube can vertically enter an inner cavity of a tank body in the disinfection tank in the axial direction under the action of gravity; the bottom face of the inner cavity of the tank body is provided with a limiting step axially aligned with the pipe containing hole, so that the first end can be kept on the limiting step in a clamped connection mode. The disinfection tank is designed for the titanium alloy end of the peritoneal dialysis catheter, so that the end can be ensured to be completely immersed into disinfectant in the disinfection tank under the action of gravity, and the pollution risk of the external environment to the peritoneal dialysis catheter is reduced. In addition, due to the design of the limiting step, it is ensured that the end is kept at the stable position in the disinfection process, the end is prevented from shaking or shifting in the disinfection tank, and the titanium alloy end is prevented from being physically damaged due to collision.

The utility model discloses a control valve structure of a nasal irrigator. The control valve structure comprises a pump shell, a piston assembly and a driving assembly. The pump shell is provided with an inner cavity and a plurality of holes communicated with the inner cavity, and the holes comprise an air inlet hole and at least one pressure relief hole; the piston assembly is rotatably arranged in the inner cavity; the driving assembly is in driving connection with the piston assembly and used for driving the piston assembly to rotate. When the piston assembly rotates to different positions, different holes in the multiple holes can be communicated. The utility model provides a control valve structure of a nasal irrigator, which can realize multi-path control of airflow through rotation of a piston, and is convenient for the nasal irrigator to realize atomization and waterline function switching.

The device comprises an operating handle, an excision cavity with an opening in one side and a cutter, a freely-extending operating rod is arranged on the operating handle, the excision cavity is formed in the free end of the operating rod, and a suction limiting mechanism connected with external negative pressure suction equipment is movably arranged in an inner cavity of the excision cavity. The suction limiting mechanism is opposite to the opening of the excision cavity, can suck hypertrophic cardiac muscle tissue to be excided into the excision cavity, and can be close to or far away from the opening of the excision cavity so as to limit and adjust the depth of an inner cavity of the excision cavity, the cutter is movably arranged at the opening of the excision cavity in parallel, and a linkage mechanism is further arranged on the operating handle. The linkage mechanism penetrates through the operating rod to be connected with the cutter, the cutter can be pushed to move in parallel from one end of the opening of the excision cavity to the other end of the opening of the excision cavity so as to excide hypertrophic cardiac muscle tissue entering the excision cavity, by adjusting the position of the suction limiting mechanism, a doctor can conveniently control the excision thickness or depth, and the operation precision is improved.

This utility model provides a water tank pumping mechanism, belonging to the field of mechanical technology. The water tank pumping mechanism includes a water tank with an internal cavity and an open top, as well as an end cap, a pump assembly, and a drive assembly. The end cap is fastened to the water tank port. The side of the water tank is a contact portion for contact with a mop. The pump assembly is connected inside the water tank. The drive assembly is located on the side of the water tank, with one side extending out of the contact portion. The other side of the drive assembly is connected to the pump assembly. The water inlet of the pump assembly is located at the bottom of the water tank, and the water outlet is located at the contact portion. This water tank pumping mechanism has high stability.

The invention relates to the technical field of medical instrument forming control, and particularly discloses an intrusive multi-cavity medical catheter precise gas-assisted extrusion forming control system which is characterized in that melt physical properties, melt process and gas process parameters are collected in real time; constructing a dynamic gas-assisted control mapping table through collaborative optimization based on the collected parameters; according to the mapping table, carrying out real-time cooperative adjustment on the gas pressure of the gas-assisted layers of the outside and each inner cavity, and synchronously forming a plurality of layers of gas-assisted wrapping flow fields which are uniformly isolated in the circumferential direction of the melt and on the interface of the inner cavity channel; based on the flow field, the local flow velocity and the overall traction rate of the melt in the mouth mold are dynamically adjusted, precise extrusion molding is achieved, and product morphology and surface state data are monitored on line; during extrusion molding, the injection position and atomization distribution of the anti-inflammatory aerosol are regulated and controlled according to a mapping table and real-time data, so that the anti-inflammatory aerosol is uniformly deposited on the surface of the catheter under the guidance of a plurality of layers of gas-assisted flow fields; the problems of mold release expansion, deformation, fracture and surface burrs in extrusion of a traditional multi-cavity catheter are solved.

This invention provides a roller internal cavity coolant circulation channel device, relating to the field of roller internal cavity cooling technology. It includes a roller body, a connecting structure, a circulation cooling structure, and a support structure. The roller body has connecting structures at both ends. Each connecting structure includes a connecting groove formed on the roller. A connecting ring is movably connected to the inner wall of the connecting groove, and a connecting ring is fixedly connected to the side of the connecting ring away from the connecting groove. A circular groove is formed on the inner wall of the connecting ring, and a connecting strip is slidably connected to the inner wall of the circular groove. This invention achieves the purpose of convenient and quick disassembly and replacement of the roller. When the roller is worn and needs replacement, it is not necessary to disassemble the entire support structure; only the connecting strip needs to be operated to release the limiting position on the roller, allowing for quick removal and replacement. This simplifies the maintenance and replacement process, reducing maintenance difficulty and replacement costs.

The utility model discloses a biliary tract inside and outside drainage device which comprises a drainage catheter, a fixing stay wire and a hard sleeve. The drainage catheter is composed of an inner drainage area, a narrow section covering area, a shaping area and an outer drainage area, and the interior of the drainage catheter is of a hollow structure. One end of the inner drainage area is designed into a cylindrical cone; a clamping table is arranged at one end of the outer drainage area and used for connecting a cap or a drainage bag; side holes penetrating through the inner cavity are formed in the outer walls of the inner drainage area and the shaping area; a marker point is arranged between the rear end of the side hole of the inner drainage area and the narrow section coverage area; the shaping area is curled into a loop in a natural state, and the shaping area can be straightened through the hard sleeve; the narrow section coverage area is distributed between the inner drainage area and the shaping area; the fixing stay wire comprises a fixing piece and a stay wire, and the tail end of the stay wire is connected with the fixing piece. The drainage catheter main body adopted by the utility model is made of a material with good biocompatibility; and internal drainage and external drainage can be realized. Multiple side holes are formed in the middle and the head end of the drainage tube, sufficient drainage is promoted, and infection risks are reduced.

The utility model relates to pest prevention and control technical field more specifically, relate to a biological control device and pest control system thereof, the biological control device among them includes pipeline, first carry bacteria device, nest board, light shield and tray, is equipped with the mouth on the pipeline, first carry bacteria device is connected in one end of the pipeline, light shield, nest board and tray all are set in the pipeline and are connected with the pipeline, light shield cover is established in the tray and is surrounded into movable cavity between both, nest board is located in movable cavity, the inner chamber of pipeline communicates with movable cavity through the mouth. The utility model overcomes the deficiency that the long-term stable prevention and control effect is difficult to form due to the fact that ants are prone to migrate in the prior art, by providing stable and comfortable habitat and nest building place for ants, ants in nature can be attracted to nest and settle in movable cavity, which is conducive to increasing the frequency and time of contact between ants and the first bacteria carrying device, thereby more effectively carrying and spreading insecticidal microorganisms, forming a long-term stable prevention and control effect.