85results about How to "Avoid external contamination" patented technology

The invention discloses a device for enriching semi-volatile organic compounds in underground water. The device comprises a barrel which is provided with an overflow port and an emptying port, wherein the upper end of the barrel is provided with a water sample inlet; a water filter is assembled at a water sample inlet end; connecting rods are uniformly distributed on the barrel; a disc body with a water inlet pipe is arranged on each connecting rod in a penetrating way; the water inlet pipe is communicated with a sealing ring arranged under the disc body after passing through the disc body; an inlet at the upper end of the water filter is tightly matched with the sealing ring; an outlet at the lower end of the water filter is communicated with a backflow pipe fixedly connected to the barrel; and an outlet at the lower end of the backflow pipe is located at the bottom of the barrel. By using the device, the positive and negative enrichment of semi-volatile organic compounds in water under various hydrogeological conductions in field geological investigation can be realized, the sampling cost is reduced, the work efficiency is increased, the semi-volatile organic compounds are easy to store and transport and free of secondary pollution, substances to be detected are prevented from being lost in the operation process, and the recovery rate of the semi-volatile organic compounds is increased, for example, the recovery rate of the sampled phenanthrene in the detected underground water can be increased from 70% in the prior art to 90%.

A chemical detection system includes detectors connected to a pump via a filter and hosing. The filter prevents the interior of the pump from internal contamination from a chemical or toxic agent. The airflow through the detector may be varied by an adjustable orifice. A pistol grip for holding the system and operating it is balanced with respect to a center of gravity.

In a connection structure of an electronic component and a wired circuit board, the electronic component includes a plurality of external terminals. The wired circuit board includes a metal supporting board, an insulating base layer formed on the metal supporting board, and a conductive pattern formed on the insulating base layer. The conductive pattern includes a plurality of terminal portions for connection with the plurality of external terminals. The electronic component and the wired circuit board are disposed such that the plurality of external terminals and the plurality of terminal portions face each other. The wired circuit board is bent such that the conductive pattern is warped, and by the reaction force of the warping, the terminal portions and the external terminals are abutted, and the electronic component and the wired circuit board are electrically connected.

A solid-state biological reaction device, comprising a main tank body and a collector is provided. A top air outlet, a bottom air inlet and a material entrance and exit are provided on the main tank body. The collector is connected to the main tank body through the top air outlet. Also provided is a method for preparing filamentous fungus spores utilizing the solid-state biological reaction device, comprising the steps of: feeding a culture substrate into the main tank body through the material entrance and exit, performing steam sterilization by injecting steam through the bottom air inlet, inoculating the filamentous fungus strains onto a sterile culture substrate in the main tank body for culturing so as to obtain mature filamentous fungus spores, and then passing dry air into the main tank body through the bottom air inlet, so that the filamentous fungus spores enter the collector through the top air outlet.

The invention relates to a regulatable Hall effect sensor which is used for distance detection, speed detection, angle detection and rotating speed detection, and is particularly applied to the fields of automotive cam and crankshaft speed / position detection, speedometers used in automobiles and industries, and the like. The regulatable Hall effect sensor comprises a lead wire set, a printed-circuit board and a Hall element, wherein, the lead wire set and the Hall element are respectively fixed on the printed-circuit board, and also are provided with magnetic steel sleeves and magnetic steel; the magnetic steel is arranged in the magnetic steel sleeve, is made of permanent magnet materials, and is provided with external screw threads; the magnetic steel sleeve is made of nonmagnetic materials, and is provided with internal screw threads; the external screw threads are matched with the internal screw threads; the magnetic steel sleeve is fixedly connected on the printed-circuit board; and the lower bottom surface of the magnetic steel sleeve is connected with the Hall element.

The present invention relates to a filling device for food product packaging plants in special containers. Particularly, the invention relates to a filling device of the electronic type, in which a contact between the valve and the container to be filled does not occur. Specifically, the invention relates to the beverage bottling field. Particularly, the present invention relates to a filling device (1) comprising a valve body (2) in which a dispensing duct (3) for a filling fluid is obtained, the dispensing duct (3) ending inferiorly with a dispensing nozzle (4), in which the lower portion (2') of the valve body (2) comprises a sleeve (13) surrounding the dispensing nozzle (4), so as to create an annular chamber (14) between the outer surface of the dispensing nozzle (4) and the inner surface of the sleeve (13), characterized in that said sleeve (13) is connected to a sanitization duct (15) which is arranged in flow communication with a source (19) of a gaseous sanitization fluid.

The invention relates to the field of biotechnology and particularly relates to a menstrual blood preserving fluid and an application thereof and a separation culture method of menstrual blood-source endometrium stem cells, wherein the menstrual blood is the source of the menstrual blood-source endometrium stem cells. The menstrual blood of women is used as the source for stem cell collection, so that the waste is utilized and turned into wealth while the source is abundant; the number of endometrium stem cells in the menstrual blood is 30 times that in bone marrow, and the active ingredients are plentiful; and the menstrual blood is preserved by the menstrual blood preserving fluid so as to prevent the menstrual blood from being contaminated by the outside in a process from collection to separation. In the invention, the menstrual blood is preserved by the menstrual blood preserving fluid with a unique formula, and the contamination rate of the menstrual blood is remarkably reduced while the purity and activity of the obtained menstrual blood-source endometrium stem cells are guaranteed.

The present invention is directed to a biosensor being provided with a suction cavity which sucks a certain amount of sample by means of capillary phenomenon, the biosensor including a flow channel to connect the suction cavity and an analytical cavity furnished with a reagent, wherein, the flow channel has a narrowed section provided with a gap formed by narrowing a flow passage area. The narrowed section has a function to retain the sample in the suction cavity when the sample is sucked therein, and a function to circulate the sample retained in the suction cavity into the analytical cavity through the gap, when a centrifugal force is applied from the outside. The two functions held by the narrowed section enables a simple collection of blood sample, and further enables a simple transfer of the blood sample to the analytical area by applying the centrifugal force to the blood sample, as well as facilitating a component extraction.

The invention provides a subwavelength antireflective structure device and a manufacturing method of the subwavelength antireflective structure device. The subwavelength antireflective structure device comprises a flat-top subwavelength antireflective structure, and the flat-top subwavelength antireflective structure comprises a substrate and a flat-top surface microstructure etched on the substrate; the subwavelength antireflective structure device further comprises a non-flat-top structure, obtained in an oblique incidence depositional mode, above the flat-top surface microstructure; the non-flat-top structure and the substrate are made of the same material. Compared with the prior art, the subwavelength antireflective structure device can enhance the antireflective effect of a flat-top subwavelength antireflective structure in the prior art.

The invention relates to a wire changing device of a circular knitting machine, in particular to a yarn cutting driving structure. The yarn cutting driving structure comprises a yarn clamping and cutting device and a driver shell which are arranged on an outer plate of the wire changing device respectively, a swing arm is installed in the driver shell through a rotary shaft, permanent magnets areparallelly arranged at the two sides of the swinging arm, a coil is arranged on the swinging arm, the coil and the permanent magnets are parallelly placed to constitute a voice coil motor, and the swinging arm is driven by the voice coil motor to drive the yarn clamping and cutting device to complete the yarn clamping and cutting motion. By means of the wire changing device of the circular knitting machine, the internal structure and the production process are simplified, the brand-new sound coil motor is adopted, the yarn cutting driving structure is easy to manufacture and assemble, and theproduct economy and the practicability are improved.

The invention belongs to the technical field of medical devices, and particularly discloses a medical care atomizer which comprises a liquid storage chamber, an atomizing chamber and a mist outlet pipe. The mist outlet pipe is communicated with the atomizing chamber, a gas conveying pipe is disposed in the liquid storage chamber, the upper end of the gas conveying pipe is communicated with the atomizing chamber, a pressure limiting valve is arranged in the gas conveying pipe, one end of the gas conveying pipe communicated with the atomizing chamber is in a horn shape expanded outwards, an atomizing net is sealed on a horn aperture, a flow limiting pipe with the pore diameter smaller than that of the gas conveying pipe is disposed between the gas conveying pipe and a horn-shaped port, the flow limiting pipe is in an arc shape expanded gradually, a plurality of flow guide plates are staggered on the left-right inner wall of a pipe between the flow limiting pipe and the horn-shaped opening, the cross section of each flow guide plate is smaller than that of the pipe, the lower end of the gas conveying pipe is connected with an air compression device, capillarity tubes communicated witheach other are disposed around the inside of the liquid storage chamber, and the capillarity tubes are communicated with the gas conveying pipe. The liquid storage chamber, the capillarity tubes andthe gas conveying pipe are elastic. According to the scheme, the atomizing effect is good, and it is easy to clean residual liquid medicines in the atomizer.

The invention relates to the field of stem cells, in particular to a method for separating and cultivating endometrial stem cells of menstrual blood sources. The method has the advantages that female menstrual blood is used as a stem cell acquisition source, accordingly, waste can be utilized and can be turned into wealth, and the stem cell acquisition source is abundant; the quantities of the abundant endometrial stem cells in the menstrual blood are 30 times the contents of effective constituents in bone marrow, and accordingly the endometrial stem cells are high in content; the menstrual blood is preserved by the aid of menstrual blood preserving fluid and accordingly can be prevented from being contaminated by the outside in procedures from acquisition to separation; the endometrial stem cells are separated by the aid of interlayer centrifugal tubes and cell adherence processes which are combined with one another, and are cultivated by the aid of serum-free media, accordingly, the method is easy to implement and low in cost, and large quantities of endometrial stem cells with high purity and differentiation capacity can be obtained from the menstrual blood.

The invention discloses an anti-fouling sample storage device for the laboratory department. The anti-fouling sample storage device comprises a cabinet body. A disinfecting cavity is formed in the upper portion of the cabinet body. A storage cavity is formed in the lower portion of the cabinet body. A drawer is inserted in the middle of the cabinet body. An ultraviolet lamp is connected with the top of an inner cavity of the disinfecting cavity. A placement assembly is slidingly connected between two slide rails. A homocentric-squares-shaped base is arranged in an inner cavity of the storage cavity. Damping supporting columns are connected between the upper end and the lower end of the homocentric-squares-shaped base and the storage cavity. Guide wheels are symmetrically connected with theleft side wall and the right side wall of the homocentric-squares-shaped base. Slide ways matched with the guide wheels are formed in the left side wall and the right side wall of the storage cavity.A rotating shaft is rotationally connected with the middle of an inner cavity of the homocentric-squares-shaped base. A storage table fixedly sleeves the circumferential outer side wall of the rotating shaft. A semiconductor refrigeration sheet is embedded in the rear side wall of the inner cavity of the storage cavity. The anti-fouling sample storage device is reasonable in structural design andconvenient to move, it is avoided that test tubes are contaminated by the external world before sampling, the test tubes can be conveniently stored, the bumping caused to samples when the cabinet body is moved can be reduced, and the sample storage effect is further improved.

The invention discloses a flow rate pairing valve and an electrohydraulic actuating mechanism adopting the same. The upper part and the lower part of a valve body of the flow rate pairing valve are provided with a piston and a one-way valve core; a reset spring is arranged on the one-way valve core in a sleeving way; a baffle ring is arranged on the reset spring; five oil collecting openings are formed in the valve body; one end of an oil pump is connected with one side of a first oil collecting opening of a flow rate pairing valve A, and the other end of the oil pump is connected with one side of a first oil collecting opening of a flow rate pairing valve B; the other side of the first oil collecting opening of the flow rate pairing valve A is connected with a third oil collecting opening and a fifth oil collecting opening of the flow rate pairing valve B; the other side of the first oil collecting opening of the flow rate pairing valve B is connected with a third oil collecting opening and a fifth oil collecting opening of the flow rate pairing valve A; second oil collecting openings of the flow rate pairing valve A and the flow rate pairing valve B are respectively connected with oil openings of an oil cylinder; fourth oil collecting openings of the flow rate pairing valve A and the flow rate pairing valve B are respectively connected with an oil tank. The flow rate pairing valve has the advantages that the structure is simple and compact; an electromagnetic valve is not needed; the output is realized by controlling the motor; the system belongs to an integration integral system.

The present invention discloses a cultivation method for lobular red sandalwood nursery stock. The method is characterized by comprising the following steps of: 1) selecting a shoot for cutting: selecting a root segment of a lobular red sandalwood tree with roughness of 0.5-1 cm and a length greater than 6 cm as the shoot for cutting; 2) controlling cuttage time; 3) treating the shoot for cutting; 4) preparing a cuttage medium: using a cuttage container filled with a nutrient medium to carry out cuttage, the nutrient medium comprising, from bottom to top, a first-layer medium, a second-layer medium, and a third-layer medium, wherein the first-layer medium is formed by mixing black soil, biogas, and peat in a mass ratio of 1:1:1 ; the second-layer medium is formed by mixing leaf mold, coconut dust, and vermicompost are mixed in a mass ratio of 3:1:2 ; and third-layer medium is formed by mixing leaf mold and vermicompost in a mass ratio of 2:1; and and 5) carrying out a cuttage process: controlling inserted depth of the shoot for cutting to not exceed 1 / 3 the second-layer medium. The lobular red sandalwood nursery stock cultivated by the cultivation method disclosed by the invention can grow to be used for making furniture about 20 years later after transplanting, and the growth rate of the lobular red sandalwood is significantly increased.

Bottomed first regions 23a′ and 23b′, and second regions 24a′ and 24b′ are formed by joining film 14 to undersurface 21 of chip body 12 of a micro-channel chip. Third regions 25a′ and 25b′ are formed between first regions 23a′ and 23b′, and second regions 24a′ and 24b′ so as to be located on carbon inks 16a and 16b. The width of third regions 25a′ and 25b′ is formed so as to be greater than the width of carbon inks 16a and 16b.

The invention discloses a disposable spray head module suitable for biomedical detection. The disposable spray head module comprises a base and a containing bottle, wherein a spray head assembly is arranged inside the base; a puncture part, a fastening part and an isolating assembly are arranged on the spray head assembly; the containing bottle is used for containing liquid and provided with an opening, and the opening is sealed by a diaphragm; when the containing bottle is arranged on the base, the diaphragm of the containing bottle is arranged corresponding to the puncture part of the base; and the opening of the containing bottle is blocked on the fastening part of the base, so that the puncture part penetrates through the diaphragm for guiding the liquid in the containing bottle to flow to the spray head assembly by virtue of the puncture part, and guiding clean gas to adjust the internal pressure of the containing bottle by virtue of the isolating assembly, and therefore, micro-droplets are sprayed out by the spray head assembly.

The invention relates to an integrated Hall-effect sensor, which is applied to the fields such as distance detection, speed detection, angle detection, rotate speed detection and the like, specifically applied to the fields of automobile cam and crank speed / position detection, an automobile and industrial autometers, treadmills, automatic control, textile machinery and the like. The integrated Hall-effect sensor comprises a Hall element and a lead group. The pins of the Hall element are connected with the lead group, mutually matched bracket and hollow shell are also arranged on the Hall-effect sensor, and the Hall element is fixed in the bracket which is fixed in a cylindrical hollow shell which is magnetically tempered. The invention has the advantages of small volume, wide application range, simple production and installation, integrally packaged magnetic steel shell, high overall reliability, strong shake resistance, strong interference resistance and good consistency.

A large bearing heating device for mining machinery comprises a base and a heating pot. A groove is formed in the base, an electric heating plate is arranged in the groove, the heating pot is arrangedon the electric heating plate, the outer bottom of the heating pot is attached to the upper surface of the electric heating plate, and a temperature sensor is arranged on the side wall of the heatingpot; the portions, on the left side and the right side of the heating pot, of the base are each vertically provided with an electric cylinder, the top end of a telescopic rod of each electric cylinder is connected with a Z-shaped plate, the top ends of the telescopic rods of the electric cylinders are connected with the lower end faces of horizontal plates at the upper ends of the Z-shaped plates, supporting plates are detachably placed on horizontal plates at the lower ends of the two Z-shaped plates, one side of the base is provided with a hand push frame, and the bottom of the base is provided with universal wheels with brake functions. The large bearing heating device can be used for large bearings for mining machinery, can be conveniently transported to an operation site of mining machinery, and can heat the large bearings for mining machinery on the operation site.

The invention relates to a yarn changing device of a circular knitting machine, in particular to a yarn selection control structure. The yarn selection control structure comprises a controller shell and a yarn feeding finger arranged on a yarn changing device outer board, wherein a swinging arm is installed in the controller shell by virtue of a rotating shaft, two sides of the swinging arm are respectively provided with a permanent magnet in parallel, the swinging arm is provided with a coil, the coil is parallel to the permanent magnet to form a voice coilsound ring motor, and the swinging arm is driven by the voice coilsound ring motor to drive the yarn feeding finger to swing so as to complete the yarn selection action. By adopting the yarn selection control structure, the internal structure and the production flow are simplified; and by adopting a brand new voice coilsound ring motor, the yarn selection control structure is easy to produce and assemble, so that the economical performance and the practicability of the product can be improved.

A method of operating an inflation system is provided. The method includes recognizing that the inflation system is activated or actuated by a user, supplying current to an electromagnet of a solenoid valve of the inflation system such that an armature-valve element of the solenoid valve is moved to an open position, wherein movement of the armature valve element to the open position actuates an actuator housing that in turn causes a normally-closed valve element of a valve housing of the inflation system to open, and ceasing current supply to the electromagnet once the actuator housing is actuated.

The invention discloses a wind storage tank stock automatic detection device. The detection device is mainly composed of a detection chassis, a guide rail upright, a pulley, a stepping motor, a signal transceiver, a horizontal distance acquisition sensor, a liquid level depth acquisition sensor and an intelligent metering controller assembled in the detection chassis; the liquid level depth acquisition sensor and the horizontal distance acquisition sensor are used for automatically detecting the rise and fall of the wine liquid surface and the area variation in the wine storage tank, and data are input into the intelligent metering controller to be computed and processes so as to quickly acquire the accurate data of liquid level depth and the remained wine of raw wine in the wine storage tank. The automatic detection device has the prominent advantages of being high in automation degree, accurate and reliable in metering data, stable in operation and long in service life, can effectively prompt enterprise information management level, has obvious technical effects of optimizing white wine blending process, improving product quality, reducing production management fee and increasing economic benefit, and has excellent application prospect in the existing white wine production industry.

The invention provides an auxiliary support based on neurosurgery operation. The auxiliary support comprises a lifting bottom frame. The top of the lifting bottom frame is fixedly connected to the lower surface of an operating table through a threaded connecting piece, the lifting bottom frame comprises three reversing idle wheels, the three reversing idle wheels are all rotationally connected to the upper surface of the lifting bottom frame, the lifting bottom frame further comprises three rear guide holes, the three rear guide holes are all formed in an inclined plate body on the inner side of the lifting bottom frame, and each rear guide hole is of a round hole structure; one ends of reset springs are fixedly connected to the outer side face of the lifting bottom frame, and the other ends of the reset springs are fixedly connected to the outer ends of the rear guide holes; and the three groups of guide side plates are fixedly connected to the upper surface of the lifting bottom frame. Therefore, compared with an existing storage rack for the operation, a storage rack for the operation has the advantages that the function of being convenient to hide is added, a tray can be unfolded and stored through leg control, the space is saved, meanwhile, excessive transfer of tools can be reduced, and the operation efficiency is greatly improved.

The invention provides a double-axis invisible hinge. The problems that a cabinet adopting a traditional single-axis hinge is poor in aesthetic degree and cannot meet practical using requirements canbe solved. The double-axis invisible hinge comprises a first hinge body and a second hinge body. The first hinge body is in a groove shape, the second hinge body is in an L shape, one outer groove wall face of the first hinge body in the groove shape is rotationally installed on a cabinet body of a cabinet through a first hinge shaft, one outer wall face of the second hinge body in the L shape isrotationally installed on a door plate of the cabinet through a second hinge shaft, the first hinge shaft and the second hinge shaft are parallel to each other, the outer groove wall face of the firsthinge body and the other outer wall face of the second hinge body are fixed through a screw, and the first hinge body and the second hinge body are spliced to form a hollow column structure with a notched angle end.

The invention relates to a telescopic ultraviolet lamp, which comprises an ultraviolet lamp assembly and a power assembly for driving the ultraviolet lamp assembly to extend out of or retract into a closestool body, wherein the ultraviolet lamp assembly comprises an installation support, an installation support cover plate and an ultraviolet lamp support, and an ultraviolet sterilization lamp module is installed on the ultraviolet lamp installation support. The invention further provides an intelligent closestool with the telescopic ultraviolet lamp and a using method. During use, a power assembly drives the ultraviolet lamp support to extend out and retract; when in need of use, the power assembly drives the ultraviolet lamp bracket to extend out; when not needed, the power assembly drives the ultraviolet lamp support to retract; therefore, the ultraviolet lamp is located in the closestool body when the closestool is not used, the purposes of protecting the ultraviolet lamp, avoidingexternal pollution, prolonging the service life of the ultraviolet lamp and improving the sterilization effect are achieved; in addition, the telescopic ultraviolet lamp cannot interfere with the leftline of a seat cover, cannot cause ultraviolet damage to the human body and is good in safety.

The invention proposes a method for making rice sausage, comprising: S1. configuring cooked rice; S2. configuring an ingredient mixture, making the ingredient mixture into strips, and coating the edible liquid-tight sheet on the outer layer S3. Wrap the rice with the ingredient mixture; S4. After sterilization and disinfection, seal it with a plastic sausage casing. The invention also discloses a rice sausage. The cooking method of the rice sausage and the whole processing process of the rice sausage of the present invention are completed once after being sealed, which prevents external pollution and has good hygienic performance; it is softly packaged in a plastic bag and is convenient to carry.

A valve assembly is provided and includes a valve housing, an actuator housing coupled to the valve housing and configured when actuated to open a normally-closed valve element in the valve housing whereby pressurized fluid is permitted to flow through the valve housing and a solenoid valve. The solenoid valve includes an armature-valve element balanced to remain in a closed position and an electromagnet. The electromagnet generates magnetic flux that moves the armature-valve element into an open position such that at least a portion of the pressurized fluid flows into the actuator housing to actuate the actuator housing.