270results about How to "Good sealing" patented technology

The invention relates to the technical field of membrane bioreactors, and discloses an integrated sewage treatment membrane bioreactor and a sewage treatment method. The reactor comprises a treatment pond, a pretreatment unit and a membrane treatment unit are arranged in the treatment pond, the membrane treatment unit comprises a support, a pump body is fixedly installed at the top of the treatment pond, a channel is formed in the support, and the extraction end of the pump body is communicated with the channel through an extraction pipe. According to the invention, the root of a membrane filament can be clamped by a pair of moving clamping plates after the membrane filament is broken, so that the membrane filament is closed after being broken, sewage is prevented from entering the membrane filament without being filtered by filter holes and polluting the whole membrane treatment unit, the clamping plates can be protected, impurities are prevented from being accumulated on the surfaces of the clamping plates, and the service life of the membrane treatment unit is prolonged. And protection on the clamping plates can be cancelled during use, so that the clean clamping plates are exposed outside, the subsequent clamping plates cannot be influenced by impurities when clamping and sealing membrane filaments, and the sealing effect on the membrane filaments is better.

The invention belongs to the technical field of medical instruments, and particularly relates to a dense net support. The dense net support comprises a front fixing section, a blocking section and a rear fixing section, and the blocking section is located between the front fixing section and the rear fixing section. The plugging section is connected with the front fixing section through a front connecting piece, and the plugging section is connected with the rear fixing section through a rear connecting piece; the plugging section is used for plugging an aneurysm position of a blood vessel, the plugging section sequentially comprises an inner layer part, a middle layer part and an outer layer part from inside to outside, the inner layer part adopts an inner layer metal stent, and the outer layer part adopts an outer layer metal stent. The dense net stent can adjust hemodynamics more accurately, and it is ensured that the blood flow of healthy blood vessels is not affected while the aneurysm is closed; the sealing effect of the aneurysm is ensured, and thrombosis is well promoted, so that blocking and healing of the aneurysm are promoted; and the endothelialization process of the stent is facilitated, so that the success rate of fusing the stent into the blood vessel is improved, the effect of completely sealing the aneurysm opening is achieved, and the recurrence risk is reduced.

The invention relates to the technical field of a preparation method of a determination kit for in-vitro determination of adiponectin in a human body, and particularly discloses a preparation method of a determination kit for in-vitro determination of adiponectin in a human body, which comprises the following steps: a coupling process; an S-shaped bent pipe is installed on the side connector, an upper connector is kept in an open state, a perfusion device adds 0.3-0.4 volume of a sealing buffer solution into the glass bottle, and 0.1-0.2 volume of the sealing buffer solution is injected into the glass bottle through an injection connector; and a storage process: closing the filling interface, opening the cover body, installing the up-down extending pipe, covering the cover body, opening the filling interface, carrying out resuspension ultrasonic treatment by using the storage buffer solution, and carrying out centrifugal washing for three times, thereby finally obtaining the adiponectin latex antibody. The device is easy and convenient to operate, simple in structure, independent of the manual control level and high in preparation efficiency, the situation that materials are left in a small-size glass bottle, consequently, the material ratio is difficult to control, and a small amount of confining liquid is needed is avoided, and the prepared adiponectin latex antibody is good in accuracy.

The invention relates to the technical field of carbon burying and utilization, and particularly discloses a method for increasing the carbon dioxide burying amount by using a gas-soluble foaming agent. The gas-soluble foaming agent is adopted, in-situ foaming can be achieved through formation water, the carbon storage space is increased, and the dynamic stability effect can be achieved after foam is broken; in-situ foaming is realized around a shaft through segmented alternate injection of a front gas-soluble foaming agent slug and a rear CO2 slug; by setting a real-time injection pressure feedback mechanism and dynamically adjusting the injection mode, early breakthrough and loss of carbon dioxide are reduced, the sealing efficiency is remarkably improved, and the burying effect of carbon dioxide is effectively improved.

The invention relates to the technical field of packaging equipment, in particular to a food packaging machine which comprises a rack, a film feeding assembly, a bag making assembly and a heat sealing assembly, the film feeding assembly, the bag making assembly and the heat sealing assembly are arranged on the rack, a mounting plate is arranged on the rack, and a discharging assembly is arranged on the mounting plate. The discharging assembly comprises a discharging hopper fixed to the machine frame and a discharging pipe fixed to the discharging hopper, the discharging pipe is sleeved with a manufactured packaging bag, a sealing assembly is arranged on the machine frame, and the sealing assembly is used for making the packaging bag arranged on the discharging pipe in a sleeving mode abut against the outer wall of the discharging pipe. The sealing assembly comprises two mounting rods connected to the mounting plate in a sliding mode, a first sealing ring, a second sealing ring and a double-end air cylinder, wherein the first sealing ring and the second sealing ring are fixed to the mounting rods, and the double-end air cylinder is arranged on the mounting plate. The device has the effect of reducing dust materials adhering to the packaging bag.

The present invention discloses a horizontal bag-feeding packaging machine, including a bag-taking device, a bag-sucking device, a loading device, a sealing device and a bag-feeding device throughout the entire packaging machine. The bag-taking device includes a bag-placing mechanism and a bag-grabbing mechanism, wherein the bag-placing mechanism is used to limit the placement of the packaging bag, and the bag-grabbing mechanism is used to grab the packaging bag and move it to a specified position; the bag-sucking device is used to separate the bag opening of the packaging bag, the loading device is used to load the packaging bag, and the sealing device is used to seal the bag opening. The present invention improves the efficiency of separating the bag opening of the packaging bag, facilitates the subsequent bagging, and improves the applicability of the bag-sucking device to different types of packaging bags; the loading device of the present invention has the advantages of simple structure, flexible operation, accurate bagging of materials, and makes subsequent packaging bags easier to seal; the bag-feeding device of the present application adopts a method of clamping and fixing the packaging bag for conveying instead of the cam conveying method of the horizontal bag-feeding packaging machine, and the equipment structure is relatively simple, low cost, stable operation, and convenient debugging and maintenance.

The invention discloses a fiber ring repairing device. The fiber ring repairing device comprises a degradable elastic restraining bag and filler filled in the elastic restraining bag. Space in the elastic constraint bag comprises a positioning space, a supporting space and a limiting space, and the filler comprises first filler and second filler. The first filler is located in the positioning space, fixed in shape to form a positioning part, located on the outer side of the fiber ring crevasse and used for conveying and positioning. Corresponding parts of the supporting space and the limiting space in the elastic constraint bag can be folded under the non-filling condition and then enter the fiber ring crevasse, and then the second filling part flows into the supporting space and the limiting space and forms a supporting part and a limiting part after being solidified. And the part, corresponding to the supporting space, in the elastic constraint bag can be elastically deformed under the filling of the second filler so as to adapt to the shape of the crevasse of the fiber ring. The limiting part is located on the inner side of the fibrous ring crevasse, provided with a limiting face abutting against the inner side wall of the periphery of the fibrous ring crevasse and used for preventing the fibrous ring repairing device from being extruded out of the fibrous ring crevasse by the nucleus pulposus.

The invention discloses a method for preparing a sodium-ion battery hard carbon negative electrode material by modifying industrial waste activated carbon. Industrial waste activated carbon is used as a raw material, a high-molecular polymer is used as a modifier, water or an organic solvent is used as a solvent, and the sodium-ion battery hard carbon negative electrode material is obtained through process treatment of firstly mixing, then carrying out medium-low temperature pretreatment and finally carrying out high-temperature carbonization. The method disclosed by the invention is simple and environment-friendly in process, waste utilization of the waste activated carbon generated in the field of waste gas treatment in the electronic industry, the shoemaking industry or the printing industry can be realized, and the prepared hard carbon has the characteristics of high yield, good electrochemical performance and low cost.

The invention discloses a high-adhesion environment-friendly chassis armor coating and a preparation method thereof, and belongs to the field of coating compositions. The environment-friendly chassis armor coating with strong adhesive force is prepared from the following components in parts by weight: 10 to 30 parts of acrylic resin, 10 to 30 parts of epoxy resin, 10 to 25 parts of filler, 5 to 10 parts of texanol, 1 to 5 parts of dispersing agent, 0.1 to 1 part of silane coupling agent, 0.5 to 1 part of thickening agent and 30 to 60 parts of environment-friendly solvent. Under the mutual cooperation of the components, the coating provided by the invention is high in solid content, high in drying speed, excellent in sealing property and good in adhesive force, and is adaptive to a carbon fiber chassis of a new energy automobile.

The inorganic quick-setting filling material comprises a material A and a material B. The material A is prepared from the following components in parts by weight: 25-35 parts of sulphoaluminate cement, 30-40 parts of blast furnace slag, 10-20 parts of waste gypsum, 1-3 parts of recycled alumina fiber, 5-10 parts of volcanic ash and 0.8-1.2 parts of (3, 6-diamino acridine-9-yl) boric acid. The material B is prepared from the following raw materials in parts by weight: 4 to 6 parts of functional water-soluble resin, 1 to 2 parts of sodium 3-(N-morpholinyl)-2-hydroxypropanesulfonate, 0.5 to 0.8 part of sucralose, 0.1 to 1 part of sodium lignin sulfonate, 0.8 to 1.2 parts of 1, 3, 5-triglycidyl-S-triazinetrione and 0.1 to 0.5 part of sodium N-(trimethoxysilylpropyl) ethylenediamine triacetate. The material is good in rapid hardening effect, high in compressive strength, good in flame-retardant and antistatic performance and long in service life.

The invention relates to the field of medical instruments, in particular to a suturing device which comprises a supporting and recycling system, a first conveying system and a second conveying system, and the supporting and recycling system comprises a supporting and traction structure and a supporting assembly connected with the supporting and traction structure; the first conveying system and the second conveying system are configured to convey the first suturing piece and the second suturing piece to penetrate through the two to-be-closed tissues respectively, and the first suturing piece and the second suturing piece are connected with the supporting traction structure or captured by the supporting traction structure; and the supporting traction structure supports the tissue to be closed when the first conveying system and the second conveying system penetrate through the tissue to be closed.

The invention relates to the technical field of high-temperature superconducting magnets, in particular to a vacuum paraffin solid sealing control method for a high-temperature superconducting magnet. Comprising the steps that a plurality of working sub-areas are established according to parameters of the solid sealing equipment, and a heating sub-module is arranged in each working sub-area; characteristic parameters of the to-be-processed high-temperature superconducting magnet are obtained, and a solid sealing control strategy of the to-be-processed high-temperature superconducting magnet is set according to the characteristic parameters; acquiring monitoring data of each working sub-region according to a preset feedback time node, and judging whether a correction instruction is generated or not according to all the monitoring data; a coil tray in a paraffin solid-sealing furnace is improved, a plurality of working sub-areas are established, a modular heating mode is adopted, the solid-sealing requirements of various types of high-temperature superconducting magnet coils are met, meanwhile, a corresponding solid-sealing control strategy is rapidly set according to real-time characteristic parameters of a high-temperature superconducting magnet to be processed, and the high-temperature superconducting magnet coil solid-sealing efficiency is improved. And the paraffin sealing effect and the overall sealing efficiency of the high-temperature superconducting magnet coil are improved.

The utility model discloses a gas drainage hole packer with a detection structure, and relates to the technical field of hole packers, the gas drainage hole packer comprises a main body assembly, the main body assembly comprises a sleeve, the inner wall of the sleeve is fixedly connected with six groups of fixing rings, the inner walls of the six groups of fixing rings are fixedly connected with an exhaust pipe, and the exhaust pipe is internally provided with a hole sealing assembly. The threaded sleeve is rotated to enable the circular shaft to drive the extrusion ring to extrude gas between the sleeve and the exhaust pipe, so that the gas enters the connecting pipe and is divided into the telescopic pipes, and the telescopic pipes extend out of the sleeve under the action of air pressure to drive the air bag and the baffle to extend out and be attached to the inner wall of a drill hole. When the air bag is moved out of the sleeve, the air bag expands and is tightly attached to the inner wall of the drill hole, the hole sealing effect on the drill hole is effectively improved, the situation of gas leakage during gas drainage is avoided, the hole sealing effect can be rapidly achieved through the hole sealing assembly, and then the working efficiency is further improved.

The invention belongs to the technical field of coal mine gas extraction, and relates to a flexible wall-attached hole sealing device, a hole wall crack blocking method and a hole sealing method.The flexible wall-attached hole sealing device comprises a flexible wall-attached hole packer and an air bag, the flexible wall-attached hole packer comprises a hole-shaped flexible wall-attached material, and the outer diameter of the hole-shaped flexible wall-attached material is matched with the inner diameter of a coal seam gas extraction drill hole; the air bag comprises a central flow injection pipe and an air bag fixedly arranged on the central flow injection pipe in a sleeving mode, the front end of the central flow injection pipe penetrates through the air bag, and a flow injection hole communicated with the air bag is formed in the central flow injection pipe so that water can be injected into the air bag or air can be inflated into the air bag, and therefore the hole-shaped flexible wall-attaching material can be attached to the inner wall of the coal seam gas extraction drill hole; and / or, a plurality of grouting pipes are arranged on the outer side of the hole-shaped flexible wall-attaching material, and water is injected into the hole-shaped flexible wall-attaching material after the hole-shaped flexible wall-attaching material is attached to the inner wall of the coal seam gas extraction drill hole, so that the hole-shaped flexible wall-attaching material is solidified, and the inner wall of the coal seam gas extraction drill hole is blocked.

The utility model discloses a laryngeal breather pipe which comprises a breather pipe body, a breather cavity and an esophagus drainage cavity are arranged in the breather pipe body, a laryngeal cuff and an esophagus cuff are arranged on the breather pipe body, and an air outlet of the breather pipe body is formed in the pipe wall of the pipe section, between the esophagus cuff and the laryngeal cuff, of the breather pipe body. The patient end of the breather pipe is connected with a soft head which can be conveniently inserted into the esophagus of a patient, a drainage hole communicated with an esophagus drainage cavity is formed in the soft head, the laryngeal cuff is arranged between the esophagus cuff and the machine end of the breather pipe, an esophagus drainage channel is formed in the outer wall of the breather pipe, and the esophagus drainage channel is communicated with the esophagus drainage cavity. And the esophagus drainage channel is communicated with the esophagus drainage cavity. The ventilation cavity and the esophagus drainage cavity are formed in the ventilation pipe, and the glottis is closed through the laryngeal cuff; the esophagus of a patient is sealed through the esophagus cuff, esophagus drainage is conducted on the patient, and reflux and aspiration are prevented.

The invention relates to a strong plugging type oil-based drilling fluid system suitable for a fractured formation and a preparation method thereof, the oil-based drilling fluid system comprises the following components by mass: 70-80 parts of base oil, 3-5 parts of an integrated emulsifier, 1-3 parts of an alkalinity regulator, 2-4 parts of a liquid filtrate reducer, and 1.5-3 parts of an oil-based efficient tackifying and shear strength improving agent, 1.5-3.0 parts of a multi-stage crack plugging agent and 0-80 parts of a weighting material. The strong-plugging oil-based drilling fluid is wide in application range, the density can be adjusted between 0.9 g / cm < 3 > and 2.2 g / cm < 3 >, and the strong-plugging oil-based drilling fluid has relatively good rheological property, suspension stability and filter loss control capability in a range of 60-170 DEG C and can be applied to shale gas drilling construction of a fractured formation.

The invention belongs to the technical field of medical materials, and relates to a bioactive glass composition as well as a preparation method and application thereof. The present invention provides a bioactive glass composition, which comprises: a base material, which is a bioactive glass; the surface of the base material is modified by a polyphenol compound. According to the invention, after being subjected to polyphenol compound surface modification, the bioactive glass shows a better sealing effect when being used for dentin exposure sensitive sealing, so that the drug loading rate, the biocompatibility, the water solubility, the biological activity and the antibacterial effect of the bioactive glass are improved; moreover, the acid-resistant stability and the wear-resistant stability of the sealing effect can also be improved when the sealing agent is used for repairing the dentin exposure sensitivity.

The invention discloses a method for in-situ growth of a ZIF-7 film layer on the surface of a magnesium alloy micro-arc oxidation film layer, and the method specifically comprises the following steps: step 1, treating the surface of a magnesium alloy workpiece to be processed to make the surface smooth; 2, the workpiece treated in the step 1 serves as an anode to be placed in electrolyte, graphite serves as a cathode, a direct-current power source is adopted for conducting micro-arc oxidation treatment on the workpiece in a constant-current mode, a micro-arc oxidation film layer is formed on the surface of the workpiece, and then cleaning and blow-drying are conducted; step 3, putting the workpiece prepared in the step 2 into a ZIF-7 seed crystal solution, keeping the temperature at 110-130 DEG C for 180-300 minutes for in-situ growth, and taking out, cleaning and drying the workpiece after the growth is finished; wherein the ZIF-7 seed crystal liquid is prepared from zinc nitrate hexahydrate and benzimidazole, and the solvent is prepared from N, N-dimethylformamide and methanol; in the ZIF-7 seed crystal liquid, the concentration of zinc nitrate hexahydrate is 0.5 to 2.5 g / L, and the concentration of benzimidazole is 0.5 to 2.5 g / L.

The present invention belongs to the technical field of heat exchange equipment, and specifically relates to a tailless packaged heat pipe manufacturing process and a tailless packaged heat pipe manufactured by the same, and the tailless packaged heat pipe manufacturing process comprises the following steps: S1, preparing a mixture, S2, sintering; S3, pore making treatment; S4, making an anti-wetting coating; S5, heat diffusion; S6, welding an isolation net; S7, setting a getter; S8, preparing a head 1; S9, preparing a head 2; S10, making a gas barrier coating; S11, heat treatment; S12, making an anti-leakage layer. The tailless packaged heat pipe comprises a heat pipe, and the heat pipe comprises a heat pipe fitting, and a head 1 and a head 2 are respectively arranged at both ends of the heat pipe fitting, an isolation net is arranged inside the heat pipe fitting, an anti-wetting coating is arranged on the isolation net, a gas barrier coating is arranged on the head 1 and the head 2, and an anti-leakage layer is arranged outside the gas barrier coating. The present invention solves the problem of residual tail pipes existing in the manufacture of heat pipes and prolongs the service life of the heat pipes.

The invention relates to a sealing structure, a sealing method, a gas compressor and a gas turbine engine. The sealing structure comprises a first part and a second part, wherein the first part is located at the root of the stator blade; the second part is positioned on the rotor corresponding to the stator blade; a sealing gap is formed between the first part and the second part in the radial direction; wherein the first part comprises a honeycomb body and a protruding body, the second part comprises a first tooth and a second tooth which are adjacent in the axial direction, and the second tooth is located on the downstream of the first tooth; the axial positions of the first teeth and the second teeth correspond to the axial position of the honeycomb body, the axial position of the protruding body corresponds to a first axial area between the first teeth and the second teeth, and the protruding body protrudes inwards in the radial direction relative to the radial position of the honeycomb body.

The invention belongs to the technical field of material surface treatment, and particularly relates to a calcium-based phosphate hole sealing treatment method based on a biomedical magnesium alloy micro-arc oxidation coating. Carrying out micro-arc oxidation treatment on the magnesium alloy to obtain a micro-arc oxidation coating; and then hole sealing treatment is conducted in a hole sealing solution composed of calcium-based phosphate, the magnesium alloy surface micro-arc oxidation-calcium-based phosphate hole sealing composite coating is obtained, and the hole sealing solution is a mixed aqueous solution of soluble calcium salt, NH4H2PO4, NaNO3, C10H14N2Na2O8. 2H2O and H3PO4. After magnesium alloy is subjected to micro-arc oxidation treatment, a micro-arc oxidation coating formed on the surface has the defects of cracks, pores and the like, and the corrosion resistance of the coating is not facilitated. In order to further eliminate the influence of the defects in the coating, a novel calcium-based phosphate hole sealing treatment technology is adopted, so that the corrosion resistance of the coating can be remarkably enhanced, and the biocompatibility of the coating can be improved by introducing a calcium element.

The invention provides an implementation method for switching a client among multiple working areas in a Wayland environment, which belongs to the technical field of Wayland synthesizer development and comprises the following steps of: step 1), initializing, namely initializing a Wayland synthesizer and initializing multiple working areas; the method comprises the steps of (1) establishing a working area, (2) establishing a client and adding the client into the working area, (3) moving the client to the working area, and (4) moving the client out of the working area. The method adopts a way based on a Wayland linked list, realizes a function of switching the client among multiple working areas at a Wayland synthesizer end, reduces data interaction between the client and the synthesizer, and saves time and resource cost.

The invention discloses a preparation method of a magnesium alloy surface composite film, and belongs to the technical field of magnesium alloy surface treatment. According to the preparation method, a pretreated magnesium alloy substrate is firstly soaked in an alkaline solution, then the magnesium alloy substrate is sequentially placed in a first hydrothermal growth solution and a second hydrothermal growth solution to be subjected to a hydrothermal reaction, and in the first hydrothermal reaction, a zinc site, namely a nucleation point for in-situ growth of a zinc oxide nanorod, can be formed while an LDHs sheet is formed; in the second hydrothermal reaction, a zinc site formed in the first hydrothermal reaction is used as a nucleation point for in-situ growth of the zinc oxide nanorod, so that the growth of the zinc oxide nanorod array perpendicular to the LDHs sheet can be effectively regulated and controlled, a better sealing effect on the LDHs irregular micro-gap is realized, the LDHs membrane gap is shrunk to several nanometers, and the LDHs membrane has good sealing performance. Furthermore, the difference between the gap sizes is reduced, and the corrosion resistance of the surface composite film is improved. In addition, the preparation method provided by the invention is simple to operate and beneficial to actual production.

The invention relates to the technical field of feed packaging, and particularly discloses packaging equipment and method for fermentation biological feed production. The packaging equipment comprises a filling assembly arranged on a rack, the filling assembly comprises a discharging pipe used for charging, a supporting assembly and a control part are arranged on the rack, and the supporting assembly comprises a sliding sleeve, an air bag, a connecting rod and a driving part; the sliding sleeve is slidably arranged on the discharging pipe in the vertical direction, the output end of the driving part is connected with the sliding sleeve, the two ends of the connecting rod are connected with the sliding sleeve and the air bag correspondingly, a rotating part is arranged at the joint of the connecting rod and the sliding sleeve and used for driving the connecting rod to rotate and unfold, and the connecting rod unfolds to drive the air bag to unfold so as to support a packaging bag. The control piece is matched with the connecting rod to drive the connecting rod to rotate; the packaging equipment and method for fermentation biological feed production have the effect that openings of packaging bags can be conveniently aligned for sealing.

The invention discloses a turbine device for improving the sealing performance of a rim and the aerodynamic performance of a turbine, which comprises a static-turntable cavity and a rotor hub end wall, and the rotor hub end wall is arranged above the static-turntable cavity; the static-rotating disc cavity comprises a static disc wall face, a jet flow groove is formed in the position, close to the wheel flange, of the static disc wall face, and the end wall of the rotor hub is a non-axisymmetric end wall. The vortex structure in the rim gap is broken through the jet flow groove, so that the rim sealing performance of the static-rotating disc cavity is improved, the vortex strength of an inlet of the downstream rotor is reduced, and a good air inlet condition is provided for the non-axisymmetric end wall of the downstream rotor to control secondary flow; the end wall of the rotor hub is arranged to be a non-axisymmetric end wall, so that the development of secondary flow of the hub in the flow direction is delayed, and the aerodynamic performance of the turbine is integrally enhanced. By means of the combined structure, the turbine aerodynamic performance can be improved while the sealing performance of the static-rotating disc cavity rim is improved.

The invention provides a preparation method of sealing aging resistant PBAT resin, biodegradable plastic and application, and the preparation method comprises the following steps: mixing adipic acid, butanediol and a first catalyst, and carrying out a first esterification reaction to obtain a first intermediate product; mixing terephthalic acid, m-phenylenediacetic acid, butanediol and a second catalyst, and carrying out a second esterification reaction to obtain a second intermediate product; performing a pre-polycondensation reaction on the first intermediate product, the second intermediate product and a pre-polycondensation catalyst in a polymerization reaction kettle to obtain a pre-polycondensation product; and carrying out final polycondensation on the pre-polycondensation product to obtain the sealing aging resistant PBAT resin. The edge sealing bag prepared from the sealing aging-resistant PBAT resin provided by the invention has more excellent sealing performance, and the sealing aging-resistant performance of the edge sealing bag is better.

The utility model relates to the technical field of medical auxiliary supplies, in particular to a three-cavity valve urethral catheter, which aims to solve the problems of the existing urethral catheter, and adopts the scheme that a water filling nozzle tube, a liquid outlet tube and a liquid inlet tube are jointly connected to the tail end of a catheter body, a hole groove is formed in the side part of the head end of the catheter body, and a balloon arranged on the catheter body is arranged behind the hole groove. A urination channel, a flushing channel and a liquid filling channel are arranged in the catheter body, and the water injection nozzle tube, the liquid filling channel and the balloon are sequentially connected to form an inflation channel. The liquid outlet tube, the urination channel and the head end of the tube body are sequentially connected to form a catheterization channel; the liquid inlet pipe, the flushing channel and the hole groove are sequentially connected to form a flushing passage; the water injection port pipe is further connected with a water injection hard valve, threads are arranged on the inner wall of the water injection hard valve, the pressure reducing device is in threaded connection with the water injection hard valve, and valves are arranged in the liquid outlet pipe and the liquid inlet pipe. And the valve in the liquid outlet pipe and the valve in the liquid inlet pipe are arranged in opposite directions. According to the scheme, the risk of retrograde infection of a patient is effectively reduced.

The invention discloses an electromagnetic induction smelting furnace and a steel smelting heating system and method.The electromagnetic induction smelting furnace comprises a furnace lining used for containing smelted furnace charge, and the furnace lining is in a barrel shape with an upward opening; the induction coil sleeves the radial outer side of the furnace lining and is used for introducing induction current to generate an induced magnetic field; the plurality of magnet yoke columns are uniformly distributed on the radial periphery of the induction coil so as to form a squirrel-cage-shaped structure; and the magnetic conductive disc is located below the bottom of the furnace lining, and the periphery of the magnetic conductive disc is connected with the magnetic yoke columns so that the magnetic conductive disc and the magnetic yoke columns can form a magnetic conductive path. The heating device has the advantage of being high in heating efficiency.

The present application belongs to the field of coal mine, and relates to a coal mine underground orifice blowout prevention dust isolation device, which comprises, in sequence, a stamping dust isolation assembly, a gasket eccentric isolation assembly, a columnar brush array isolation assembly and a slag collecting main body, the slag collecting main body is connected with an orifice sealing pipe in a hole, and a drill rod is arranged through the stamping dust isolation assembly, the gasket eccentric isolation assembly, the columnar brush array isolation assembly and the slag collecting main body. The present application realizes the blocking of dust in the hole through the brush dust blocking of the columnar brush array isolation assembly, the eccentric dust isolation of the eccentric isolation assembly and the stamping dust isolation of the stamping dust isolation assembly, realizes the linkage control of the mechanism on the sealing assembly, and the greater the gas pressure sprayed out of the hole, the better the sealing effect of the sealing assembly, so that the safety hidden danger problem of gas spray hole in the drilling process can be effectively solved.

A pulse feeding valve comprises a valve body, a valve element assembly and an air cylinder assembly. The valve body is of a sealing structure with openings in the upper end and the lower end, and a valve element assembly is arranged in the opening in the lower end of the valve body and is a telescopic component. An air passage is arranged at the lower end opening of the valve body; the air channel is connected to the bottom of the valve element assembly. The cylinder assembly is arranged on the outer side wall of the valve body; when the valve element assembly moves upwards, the opening in the lower end of the valve body is a discharging opening. The valve element of the pulse feeding valve moves up and down for feeding, material blockage caused by poor flowability is avoided, meanwhile, materials are fed in a sealed space, the materials are not exposed in air, the materials are prevented from being lost and polluted, the flowability of the materials is guaranteed during feeding, and the materials are convenient to clean. The feeding valve is reliable in structure and high in sealing performance in the feeding process, the dustproof effect of the feeding port is good, materials cannot leak in the charging process, and waste and loss of the materials are reduced.