271 results about "Closed tube" patented technology

The invention discloses a medical developing marker and a manufacturing method thereof, and relates to the field of medical instruments, the medical developing marker comprises a closed tube, the outer wall of the closed tube is provided with a bionic barb structure, the bionic barb structure is distributed in a flexible zigzag convex manner, and the bionic barb structure and the closed tube are integrally formed through an injection molding process; a closed cavity is arranged in the closed tube, four developing strips are symmetrically arranged in the tube wall of the closed cavity, the tube wall of the region where the developing strips are located is etched to form a weak band, and a developing material layer and a sustained-release medicine layer are sequentially deposited at the weak band. The developing material layer and the sustained-release drug and / or marked nano-particle layer are alternately deposited to form a functional composite layer, and the functional composite layer can directionally rupture to release the therapeutic drug under the action of implantation pressure. The marker integrates the functions of precise development, tissue anchoring and drug sustained release, is adaptive to multi-mode imaging such as ultrasonic imaging, X-ray imaging, CT imaging, MRI imaging and PET-CT imaging, and has remarkable clinical value in precise positioning treatment of solid tumors such as breast cancer and liver cancer.

The present invention provides a low-cost, non-invasive device (100) for measuring flow and leakage detection of fluids within closed conduits. The invention utilizes affordable a Micro-Electro Mechanical System (MEMS) based Inertial Measurement Units (IMUs) sensor (102) in the device to non-invasively measure fluid flow and leakage of fluids which exhibit turbulence or flow-induced-vibrations within a conduit. This device fin directly estimates flow rate or velocity based on the concept of Reynolds number in fluid dynamics. Further, this device is easy to install on pipes of all dimensions, requires minimal calibration, has no moving parts in contact with the fluid, can be integrated with Geographic Information System (GIS) software, and possesses advanced metering infrastructure to support remote reading and automated bill generation.

The invention provides a coal mine fire early warning assistant defense joint control intelligent management and control platform, and relates to the technical field of coal mine safety detection. The platform is applied to a goaf equipped with a nitrogen making machine, and comprises a data acquisition layer, a data processing layer, a communication control layer, a monitoring and early warning layer and a data visualization layer, the platform collects the fluid flow in a closed pipeline in a goaf, the environment temperature of the goaf, the pressure of different working faces in a coal mine and the pressure of the position where each valve of the nitrogen making machine is located in real time, integrates all the collected data, compares and analyzes the integrated data with a set threshold value range, and if the analysis result is normal, the nitrogen making machine is started. If yes, the current operation state of the nitrogen making machine in the goaf is maintained; if the analysis result is abnormal, the nitrogen making machine is controlled to open a valve to inject nitrogen into the goaf for fire extinguishing until the analysis result becomes a normal position, and nitrogen injection is automatically stopped. The spontaneous combustion risk of the goaf can be effectively prevented and controlled, and the overall safety management level of a coal mine can be improved.

There is disclosed a bag having a tubular body with a top open end and a bottom closed end. The tubular body has a larger open diameter at the top open end. The tubular body narrows into a narrower open diameter adjacent to a bottom closed end. The tubular body in a flattened two-fold condition has a pair of side edges extending from a top edge to a bottom edge. The top edge delimits the top open end. The bottom edge delimits the bottom closed end. The pair of side edges are generally parallel to one another in a first portion adjacent to the top edge.

An attachment for a mobile construction machine, in particular a wheel loader, for transporting and changing the position of drilling tools and drill pipes, comprising a base plate (1), a cylindrical, open pipe (2) arranged vertically on the base plate and connected thereto for receiving a drilling tool (3) or drill pipe, and a connecting device (6, 7) for connecting the attachment to a mobile construction machine, wherein - the cylindrical tube (2) is connected to the base plate (1) at one of the two tube ends, so that the latter partially or completely closes the tube end, and the opposite tube end is open, - the inner diameter (d) of the cylindrical tube (2) is selected so that the drilling tool (3) or drill pipe can be inserted through the open pipe end, - the cylindrical tube (2) has a slot (5) extending in its longitudinal direction, the width (b) of which is smaller than the diameter of the drilling tool (3) or drill pipe, - the connecting device (6, 7) is arranged on the side of the pipe circumference opposite the slot and is connected to the pipe (2) and / or the base plate (1).

The utility model provides a disposable tube sheath and an endoscope assembly. The disposable tube sheath comprises a tube body and a flexible light-transmitting piece, the tube body is provided with an insertion channel used for allowing an endoscope tube of an endoscope to be inserted, and the flexible light-transmitting piece seals a far-end opening of the tube body. The flexible light-transmitting piece can deform when the endoscope tube is inserted into the insertion channel and abuts against the flexible light-transmitting piece, so that the flexible light-transmitting piece is attached to the endoscope, the attaching degree of the flexible light-transmitting piece and the endoscope is improved, a gap between the far end of the endoscope and the inner side face of the tube sheath is reduced or even eliminated, and the imaging quality is improved. Moreover, the flexible light-transmitting piece is not directly processed and fixed with the tube body, but is fixedly connected to the tube body through the fixing piece, so that the processing difficulty is reduced.

The invention discloses a primer group, a kit and a method for rapidly and visually detecting silver salmon components, belongs to the technical field of nucleic acid detection of marine fish products, and particularly relates to a method for rapidly and visually detecting the silver salmon components by using an LAMP (loop-mediated isothermal amplification) technology. The invention provides a primer combination suitable for rapid nucleic acid detection and a corresponding kit, the primer combination comprises an outer primer pair and an inner primer pair, and the kit integrates the primer combination and an optimized LAMP reaction mixed solution. The detection means has a plurality of prominent characteristics that during detection, only DNA of a sample to be detected needs to be added into an LAMP reaction mixed solution prepared in advance, and the detection work can be carried out by means of common constant-temperature equipment. After the whole detection process is about 60 minutes, the result interpretation can be completed by observing the color development condition with naked eyes, and when the reaction mixed solution is yellow, the reaction mixed solution is judged to be positive; and if the color is red, determining that the color is negative. Due to the design of closed tube detection, the hidden danger of aerosol pollution caused by uncovering operation is effectively avoided. The method is excellent in specificity and relatively high in detection sensitivity, and can detect 10 <-1 > ng of genome DNA or a sample with the mass fraction of 1% at least. The method has the advantages of good result reproducibility, simplicity and convenience in operation and low cost. The method is particularly suitable for being applied to scenes with relatively limited resources such as basic units and field detection, the cost investment in the aspect of supervision can be remarkably reduced, and the efficiency of detection work is improved.

Apparatus and methods are provided for closing a tubular structure within a patient's body, e.g., a varicose vein. In one example, the apparatus includes an outer member including a cannula and an inner member carrying a pusher member slidably received within a lumen of the cannula. The cannula is inserted into the patient's body into-and-through the vein, the cannula carrying a clip within the lumen including proximal and distal tines in a stressed state and a filament coupled to one of the proximal tines. The inner member is advanced relative to the outer member to advance the pusher member to expose the distal tines from the distal tip beyond the tubular structure, whereupon the distal tines elastically deform towards a relaxed state at least partially around the tubular structure. A release member coupled to the filament is disengaged to disengage the filament from the proximal tine, and the cannula is withdrawn such that the proximal tines are released and elastically deform to at least partially surround and close the tubular structure.

The utility model relates to the technical field of venous indwelling needles, and discloses a venous indwelling needle assembly with a soft needle core, which comprises a positive pressure connector, a connector is fixedly connected to one side wall of the positive pressure connector, and an infusion extension tube is fixedly connected to the bottom end of the positive pressure connector. The closed tube can ensure that the soft needle core body is in a sterile state when being pulled out and inserted in, a medical worker communicates the infusion extension tube with the sleeve, puncture liquid medicine or blood is prevented from flowing into the closed tube, the puncture hard needle core is pulled out and discarded after blood return is found, and the liquid medicine in the infusion extension tube enters the blood through the sleeve. When the venous indwelling needle is used, the soft needle core body can be used for blocking and filling the cannula, blood is prevented from flowing back into the indwelling needle during the indwelling period of the venous indwelling needle, thrombus is prevented, and the cannula can be prevented from being blocked due to the fact that the cannula is pressed and collapsed during the indwelling period.

1. The name of the product of this design: Off-line closed-tube X-ray detection equipment. 2. Application of this design product: used for internal defect detection in semiconductor, SMT, automotive parts and other industries. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

The invention relates to the technical field of solid-liquid filtering, in particular to a plastic flexibilizer mixed solid-liquid filtering device which comprises a supporting frame, a filtering piece arranged on the supporting frame, a power piece arranged on the outer wall of the filtering piece and an extrusion piece arranged on the lower portion of the filtering piece. The filtering piece comprises a material storage pipe arranged at the upper part of the supporting frame, and a sealing pipe is arranged at the lower part of the material storage pipe; the power part comprises a U-shaped pipe arranged on the outer wall of the material storage pipe, an ejector rod is arranged at the end of the U-shaped pipe, and an extension plate is arranged on the side wall of the ejector rod. The extrusion part comprises a closed circular plate arranged on the lower portion of the closed pipe, the ejector rod in the extending end of the U-shaped pipe is driven to move upwards through pressure generated when the filtering part is fed, the ejector rod moves upwards to drive the closed circular plate and the silo which are connected with the ejector rod to move upwards to extrude mixed materials inside, and the solid-liquid mixed materials are extruded forcibly to accelerate the filtering efficiency.

The invention belongs to the technical field of biological detection, and discloses a sequence combination for rapidly detecting influenza A based on CRISPR / CAS12a-MIRA and application, the sequence combination comprises an MIRA primer pair (SEQ ID NO: 1-2) of a targeted influenza A virus M gene highly conserved region (M1 fragment), and CRISPR / Cas12a detection probes (crRNA SEQ ID NO: 3 and phosphorothioate modified FAM-biotin probe SEQ ID NO: 4). By optimizing a buffer system (containing PEG 8000 and betaine), MIRA amplification and CRISPR detection are continuously completed in a closed tube at 37-42 DEG C, and a result is output within 30 minutes. The detection sensitivity of the kit reaches 50 copies / [mu] L, the specificity is 100%, and subtypes such as H1N1, H3N2, H5N1 and H7N9 can be covered. Compared with the prior art, according to the scheme, the detection time is shortened by 67%, the probe cost is reduced by 80%, and high anti-interference performance (tolerance to 10% mucoprotein and 5% whole blood) is achieved. The kit is suitable for on-site instant detection of saliva, nasopharynx swabs and environmental samples, and an efficient and portable solution is provided for basic medical institutions and prevention and control of sudden epidemic situations.

Welded connection arrangement (100, 200, 300, 400, 500, 600) for cooled power transmission from an electrical consumer to a storage medium, the welded connection arrangement (100) comprising: a tubular electrical line (110) configured to conduct current, the tubular electrical line (110) comprising a first end (110a) for electrical connection to an electrical load and a second end (110b) for electrical connection to a storage medium, and further configured to receive a coolant for cooling the tubular electrical line (110); an electrically conductive contact member (120) attached to a respective end (110a, 110b) of the tubular electrical conduit (110) for electrically contacting the tubular electrical conduit (110); and a closure plug (130) which is inserted into the tubular electrical line (110) at the respective end (110a, 110b) of the tubular electrical line (110) and is welded to the tubular electrical line (110) together with the electrically conductive contact part (120) in order to close the tubular electrical line (110) against the escape of coolant; wherein the electrically conductive contact part (120) is welded to the tubular electrical line (110) by means of the sealing plug (130) and thus hermetically seals the tubular electrical line (110) against coolant leakage.

This application relates to a heat pipe energy pile and a heat pipe ground source heat pump system and its operation and management method, solving the technical problems of existing ground source heat pumps requiring additional power and consuming high energy, and being difficult to adapt to bidirectional energy supply in winter and summer. The system includes a pile foundation, heat pipes, a heat exchanger, and a heat pump unit. The heat pipe is integrated into the pile foundation and is a closed tube with a capillary wick, vacuumed, and filled with a phase change working fluid. It consists of an evaporation section at the bottom / side of the pile foundation and a condensation section at the top. The evaporation section exchanges heat with the soil, the condensation section is connected to the heat exchanger, and the heat pump ground source side is connected to the heat exchanger. The capillary wick drives the working fluid to flow back autonomously, realizing heat transfer or release. This application has the following effects: it resolves the contradiction between low energy consumption and year-round energy supply in existing technologies, achieves efficient bidirectional energy supply in winter and summer without additional power, and significantly reduces the energy consumption of building cold and heat source systems.

The invention belongs to the technical field of testing and sampling, and particularly discloses a semi-closed tube type static and dynamic triaxial undisturbed sample cutting ring soil sampler. Two ends of an upper joint of the soil sampler are respectively provided with interfaces connected with a drill rod and fixed with a waste soil pipe, and the bottom end of a pipe boot is provided with a cutting edge I; an outer soil sampling pipe of the soil sampling pipe is of a tubular structure formed by buckling two semi-closed pipes, external thread sections are arranged at the two ends of the outer soil sampling pipe respectively, the two ends of the outer soil sampling pipe are in threaded connection with a waste soil pipe and a pipe shoe through the external thread sections, a cutting ring support is of a double-pipe structure formed by buckling two omega-shaped semi-closed pipes, the cross section of the cutting ring support is in a transverse 8 shape, and the cutting ring support can be embedded into the outer soil sampling pipe and is provided with a fixing groove. The cutting ring is of a tubular structure formed by buckling two semi-closed tubes and can be embedded into the fixing groove. The cutting ring support of a semi-closed double-pipe structure is arranged in the soil sampling pipe, and two cutting rings can be fixed through the fixing grooves in the cutting ring support respectively, so that four tailing undisturbed samples can be sampled at a time to meet the requirements of a group of samples for a triaxial compression test, and the device has the characteristics of simple structure, easiness in disassembly and assembly and small disturbance.

The utility model discloses a French universal joint, which belongs to the technical field of universal joints, and comprises a front insertion connecting pipe, and a side extension outer sleeve is arranged on the outer wall of the front insertion connecting pipe in an extending manner; the connector assembly comprises a front extending outer closed pipe, two front connector parts and a rear connector part, the front extending outer closed pipe is arranged on the outer wall of one side of the side extending outer sleeve in an extending mode, and two penetrating grooves are formed in the outer wall of the front extending outer closed pipe. According to the French universal joint, an upper matching block is driven by a side fixing rod to move, a V-shaped extension plate is used for clamping and fixing a front pipeline, a middle adjusting cam is matched with a rear insertion matching pipe, a rear pipeline is clamped and fixed, the fixing effect between the pipeline and the joint is better, meanwhile, the French universal joint can also be matched with more types of pipelines, and the practicability is high. The pipeline fixing device is convenient to mount and dismount, does not damage the pipeline, and is beneficial to long-term use.

The utility model discloses efficient stirring and cleaning equipment of a cement paste stirrer, which relates to the technical field of stirring equipment and comprises an assembly box, a feed hopper, a discharge port, an outer pipe and the like. The outer pipe is rotationally connected with the assembly box, the stirring plate is arranged on the outer side face of the outer pipe and inclines downwards, cement can circulate at the bottom and the middle of the container, retention is prevented, and the side scraping plate and the bottom scraping plate are attached to the inner wall and the bottom of the assembly box respectively. A servo motor on the top of the assembly box drives the outer pipe to rotate through an output shaft, an output straight gear and an action straight gear of the outer pipe. During stirring, a closed pipe is inserted into the outer pipe to block the water spraying holes, and the pipe insertion part is used for placing the closed pipe; during cleaning, the closed pipe is taken out, the top of the outer pipe is connected with a pipe joint which is connected with a water pipe, and the pipe joint enables the outer pipe to rotate to spray water for cleaning and can be placed on a pipe inserting part. The equipment can realize efficient stirring, ensures the uniformity of cement paste, is convenient to clean, is prolonged in service life, is convenient to operate, and improves the production quality and efficiency of the cement paste.

The invention discloses a drainage system for saline-alkali soil improvement, and belongs to the technical field of soil drainage. Comprising a drainage pipe buried below a saline-alkali soil layer, a plurality of evenly-distributed water seepage holes are formed in the upper portion of the drainage pipe, U-shaped frames are arranged on the drainage pipe on the outer sides of the water seepage holes, the opening ends of the U-shaped frames are fixed to the drainage pipe, ejector rods are arranged at the closed ends of the U-shaped frames, and the ejector rods are connected to the U-shaped frames in a sliding mode. The outer side of the ejector rod is sleeved with a closed pipe, the end of the closed pipe is fixed to the U-shaped frame, a spring is arranged in the closed pipe, the two ends of the spring are fixed to the end of the ejector rod and the end of the closed pipe respectively, the other end of the ejector rod is located in the drainage pipe, and a rectangular through groove is formed in the lower portion of the drainage pipe. And a U-shaped collecting groove is formed below the rectangular through groove. According to the technical scheme, the problem that when the drainage pipe in the saline-alkali soil is used, water seepage holes formed in the drainage pipe are prone to being blocked, and the drainage effect becomes poor is solved.

The invention belongs to the technical field of angle measurement, and discloses a compact coal mining machine rocker arm angle measuring device based on liquid level sensing, which comprises a closed pipe, a capacitive sensor, a signal processing unit and a main control system, the closed pipe is fixed on a vertical panel of a rocker arm of the coal mining machine, capacitive sensors are symmetrically arranged on the outer side wall of the closed pipe, the capacitive sensors are electrically connected with the signal processing unit, and the signal processing unit is in communication connection with the main control system. According to the technical scheme, stable and reliable monitoring is achieved in swing angle detection of the rocker arm of the coal mining machine, and the actual requirements under the underground operation environment are met.

The invention discloses an adsorption device and a workpiece adsorption method, and relates to the technical field of workpiece adsorption. The adsorption device comprises: an adsorption member; a plurality of gas path channels; m negative pressure generating units; the air path switching module can be used for selectively communicating any air path channel with the air suction port of the corresponding negative pressure generation unit or communicating with the atmosphere or communicating with the closed pipeline; the limit negative pressure absolute value of the Nth negative pressure generating unit is smaller than that of the (N + 1) th negative pressure generating unit; when the air suction port of the Pth negative pressure generation unit is communicated with the air channel, the air channel corresponding to the (P-1) th negative pressure generation unit is communicated with the closed pipeline; and when the air channel corresponding to the (P-1) th negative pressure generation unit is communicated with the closed pipeline, the (P-1) th negative pressure generation unit stops working. The adsorption device is used for avoiding the heat accumulation phenomenon of the negative pressure generation unit on the premise that the adsorption pressure is guaranteed, the service life of the negative pressure generation unit is prolonged, and meanwhile the applicability of the adsorption device is improved.

The invention relates to kitchen waste microbial degradation treatment equipment capable of monitoring a fermentation stage, and belongs to the technical field of kitchen waste resource utilization. The kitchen waste microbial degradation treatment equipment capable of monitoring the fermentation stage comprises a stirring barrel, an electric stirrer and a controller, the electric stirrer is mounted at the top of the stirring barrel, and an output shaft of the electric stirrer penetrates into the stirring barrel; a pH value detection structure with a lifting design is adopted, so that a detection probe can be placed above kitchen garbage when the electric stirrer runs, the garbage is prevented from being wound and wrapped on the surface of a closed pipe in the stirring process, interference on detection of the detection probe is further reduced, and a worker can move the detection probe downwards to a corresponding depth for detection, so that the detection efficiency is improved, and the detection efficiency is improved. Therefore, the pH values of materials at different depths can be correspondingly detected, the monitoring accuracy of the kitchen garbage fermentation stage is improved, and directional conversion from wastes to organic fertilizers is realized.

The invention relates to a composite material pipe fitting pultrusion device based on a self-limiting magnetic suspension core mold. The composite material pipe fitting pultrusion device comprises a base, a raw material disc, a magnetic unit, a limiting unit, a forming unit and a traction unit, the core mold penetrates through the magnetic unit, the limiting unit and the forming unit; the raw material disc is of a rolling shaft structure used for winding a to-be-formed material. The magnetic unit is used for carrying out non-contact limiting on the core mold and applying backward force to the core mold to prevent the core mold from slipping off; the limiting unit is used for preventing the core mold from being separated due to stress; the forming unit is used for heating a to-be-formed material and processing the to-be-formed material into a pipe fitting; and the traction unit is used for clamping the pipe fitting and continuously and forwards pulling the pipe fitting to finally obtain a finished pipe fitting product. The device disclosed by the invention realizes continuous pultrusion of a closed pipe sleeve structure, is suitable for a hollow pipe type structure needing to be heated and cured, and provides a new process method for continuous molding of the hollow pipe type structure.

A corrugated beam guardrail stand column for controlling the embedding depth comprises a stand column body. The main body structure of the stand column is hollow column-shaped; a metal sealing pipe is fixedly arranged on the inner wall of the stand column body. A transparent tube is fixedly arranged between the metal closed tube and the upright post main body; a display window is arranged in the middle of the metal closed tube opposite to the transparent tube; the transparent tube is filled with colored liquid; and the metal closed tube is vertically provided with a graduated scale on one side of the transparent tube. The metal closed pipe is arranged in the stand column body, the graduated scale is arranged on the metal closed pipe, the embedding depth is calculated by comparing the graduated scale during construction and installation, the embedding depth of the stand column body can be conveniently controlled and checked, and constructors can rapidly and visually judge whether the stand column body is inserted in place or not. The length of the stand column body is prevented from being mistakenly used.

The invention relates to a flooding valve (10) for a storage battery, comprising a tubular body (20) which is closed by a cover (30) adapted to break when an overpressure is exerted on its face facing the outside of the tubular body. According to the invention, this valve comprises a flap (23) which also closes the tubular body and which is adapted to open towards the outside of the tubular body when an overpressure is exerted on its face facing the side of said cover. Figure for the abstract: Fig.2

The utility model belongs to a separation device, and particularly relates to an oxygen filling gas-liquid separation device for an in-situ leaching uranium mining mine. The oxygen filling gas-liquid separation device for the in-situ leaching uranium mining mine comprises a liquid storage tank, a gas inlet pipe is arranged at the top end of the liquid storage tank, a pressure-bearing drain valve is arranged at the bottom of the liquid storage tank, and a gas outlet pipe is further arranged at the top end of the liquid storage tank. The device has the remarkable effects that after the device is put into use, the problems that liquid in a closed pipeline is difficult to discharge, and the pipeline is blocked due to residual liquid in the pipeline are effectively solved.

The utility model relates to a single-head cable of a remote water meter, and the cable comprises a universal pipe, the universal pipe comprises an outlet cylinder, and the outlet cylinder is internally provided with a first protection space for placing a protection cable; the closed cylinder comprises a cylinder body; the two ends of the cylinder body are open, the cylinder body is connected to the outlet cylinder in a sliding mode, a second protection space used for containing an unprotected cable exists in the cylinder body, and the first protection space is communicated with the second protection space; the sealing plate is detachably connected to the opening in one side of the cylinder body and is used for sealing the cylinder; according to the cable outlet cylinder, the cylinder body is installed on the outlet cylinder, the unprotected cable is surrounded by the cylinder body to form a first layer of protection, the sealing plate is installed on the cylinder body, other objects are prevented from entering the cylinder body to damage the cable, and therefore the unprotected cable is protected through the cylinder body and the sealing plate on the outlet cylinder, and the problem of mechanical damage of the unprotected cable is avoided.

The invention provides a manufacturing method of a crimping type high-power high-voltage diode chip, and relates to the technical field of power semiconductor device manufacturing, and the method comprises the steps: forming an annular groove in the surface of a semiconductor wafer through laser grooving, and forming a circular PN junction isolation wall of a single chip in the groove in combination with a closed tube gallium-aluminum diffusion technology; carrying out boron-phosphorus double-substance diffusion in a unit cell region enclosed by the isolation wall to form a PN junction doping structure; a photoetching mask is adopted to limit an area, and a double-angle mesa structure is formed through chemical corrosion of an HF / HNO3 mixed solution; sequentially depositing a semi-insulating polycrystalline silicon layer and a double-layer glass passivation layer; performing laser cutting along the separating wall to separate the single chip; and sintering an anode molybdenum sheet on the anode surface of the chip, performing vacuum evaporation on a cathode aluminum film on the cathode surface of the chip, and alloying to form an electrode. According to the invention, the consistency and stability of chip manufacturing can be improved through the wafer-level mesa modeling and the inorganic passivation process.

The invention provides a bulb tube pressure testing device, and belongs to the technical field of pipeline testing. The pressure test device comprises a closed pipe, a moving assembly, a steering assembly, a first closed assembly, a second closed assembly, an inflation assembly and a marking assembly. The pressure test device has a detection state, and in the detection state, the closed tube is arranged in the bulb tube; the steering assembly is used for guiding the closed tube to move in the bulb tube; the moving assembly is used for driving the closed tube to move in the bulb tube; under the action of the first sealing assembly and the second sealing assembly, the sealing pipe and the bulb pipe form a pressure test space. The inflation assembly is used for blowing air into the pressure test space so as to judge the leakproofness of the pressure test space; the marking assembly is connected with the second sealing assembly and used for marking leakage points of the bulb tube. The pressure testing device has the effect of improving the detection efficiency and the detection accuracy of the sealing performance of the bulb tube.

The invention discloses a rapid detection method for Xanthomonas oryzae pv. Oryzae on the basis of RPA-CRISPR / Cas12b. The reagent combination comprises a specific RPA primer pair and sgRNA, and the sequences of the specific RPA primer pair and the sgRNA are respectively shown as SEQ ID NO. 1, SEQ ID NO. 2 and SEQ ID NO. 3. The detection method comprises the following steps: taking nucleic acid of a sample to be detected as a template, and performing RPA isothermal amplification by utilizing the primer pair; the amplification product is mixed with sgRNA, Cas12b protein and fluorescent reporter molecules for incubation, and the trans-cleavage activity of Cas12b is activated; a result is judged by detecting a fluorescence signal. According to the invention, the optimized RPA and CRISPR systems are integrated on the centrifugal micro-fluidic chip, so that the full-flow closed tube and automatic detection is realized, the detection can be completed within 30 minutes, the sensitivity reaches 0.156 pg / reaction, no non-specific reaction is caused to five related bacteria such as Xa and Xap, the sensitivity to XOO3 subtype is high, but the kit is not suitable for XOO2 subtype, and the kit has the advantages of rapidness, sensitivity, specificity and low equipment dependence degree, and can be used for detecting the related bacteria of XOO3 subtype and XOO2 subtype. The method is suitable for non-diagnostic detection of field environments, port environments and the like.