59results about How to "Low air tightness requirements" patented technology

A glass composition substantially free from lead and bismuth and containing vanadium oxide and phosphor oxide as main ingredients, wherein the sintered glass of the glass composition exhibits 10⁹ Ωcm or more at 25 ° C.

The invention discloses a reaction device for hydrogen production through photocatalytic water splitting. The reaction device comprises a carrier gas steel cylinder, a reaction vessel, a gas metering pool and an infrared counter, wherein the carrier gas steel cylinder, the reaction vessel and the gas metering pool are connected sequentially; the carrier gas steel cylinder is connected with a gas-washing inlet of the reaction vessel through a pressure reducing valve and a flow meter sequentially; a temperature control device is arranged outside the reaction vessel; the gas metering pool comprises a gas metering pool gas charging chamber and a gas metering pool gas discharging chamber, the gas metering pool gas charging chamber is connected with the gas metering pool gas discharging chamber through a V-shaped part and connected with the reaction vessel, and the gas metering pool gas discharging chamber is connected with a gas collection bag; and the infrared counter is used for measuring calibration bubbles produced by the V-shaped part. The invention further discloses a reaction method for hydrogen production through photocatalytic water splitting. The reaction device requires less support equipment, and is simpler, small in occupied space, lower in cost, high in automation degree, low in air-tightness requirement of the device, convenient to operate and maintain and accurate in measurement result.

The present invention relates to a rail-type vacuum fixer, and more specifically relates to the rail-type vacuum fixer with a two-piece structure composed of a suction plate, on which a screw bar is installed at the center of the top surface and a hard rotary rail is installed in the circumferential direction in the areas of the top surface, and a rotary cap, which has a screw pipe inserted by the said screw bar at the center of the inside and is equipped in the border area with a sliding rim corresponding to the said rotary rail.

The invention discloses a manufacturing method for a high polymer material three-dimensional product. According to the method, a blank of the three-dimensional product is obtained through an additive manufacturing method or a mold forming method firstly, and the base materials of the blank comprise mixed high polymer materials and conductive materials. Secondly, the blank is put in an electromagnetic environment, the blank is heated until the high polymer materials are fused through an electromagnetic induction method, and the high polymer materials are fused and soak the other materials in the blank. Afterwards, the materials are slowly cooled to the room temperature, and therefore the three-dimensional product of which the shape is the same as that of the blank and the mechanical performance mainly depends on the high polymer materials is formed.

The invention discloses a manufacturing method for a soft mode for I-beam composite material piece forming and application thereof. The open rubber soft mold is manufactured and is used for completingthe manufacturing process of an I-beam composite material structure piece. The soft mold manufacturing process is simple, the cycle is short, and the cost of raw materials is low. The I-beam composite material piece formed by the soft mold can uniformly and accurately transmit pressure applied by an autoclave, the phenomenon of overproof thickness of the composite material piece is avoided, the molding quality of the piece is ensured, and the production qualification rate and efficiency and the profile and dimensional accuracy after piece forming are improved. In addition, compared with a traditional air nozzle structure, the soft mode has lower air tightness requirements, longer service life and higher reliability, the soft mode is relatively simple and convenient in field use and latermaintenance, and the good using values are achieved.

A chuck table holds a workpiece having a warp. The chuck table includes a suction holding member having a suction holding surface for holding the workpiece under suction, and an annular seal member provided around the outer circumference of the suction holding member for supporting a peripheral portion of the workpiece. The annular seal member is formed from an elastic member. The upper surface of the annular seal member is set higher in level than the suction holding surface according to the warp of the workpiece. In holding the workpiece on the chuck table under suction, vacuum leaking from the gap between the workpiece and the suction holding surface due to the warp of the workpiece is applied to the space defined by the workpiece and the annular seal member, thereby elastically deforming the annular seal member to flatten the upper surface of the workpiece.

The invention provides a heat exchange structure used for coal drying treatment, comprising a body, an air distribution pipe and an air collection umbrella, wherein the upper end of the body is suitable for the entrance of the coal blocks and the lower end thereof is suitable for the outflow of the coal blocks; the air distribution pipe is arranged in the middle of the body and is used for introducing a heat carrier; and the air collection umbrella is arranged near the upper and lower ends of the body. In the heat exchange structure of the invention, the air distribution pipe at the upper part is arranged below the air collection umbrella, namely, the flow rate of the heat carrier is opposite to that of the materials to form counter current heat exchange, thus realizing efficient heat exchange and saving energy; in the lower part, as the water content of the coal is greatly reduced and the surface temperature of the coal blocks is raised, therefore, the mode that the air distribution pipe is arranged on the upper part and the air collection umbrella is arranged in the lower part for fair current heat exchange to prevent the precipitation of volatile matters due to overhigh temperature of the coal blocks, thus protecting the volatile matters and the fixed carbon to the maximum.

A liquid container includes a container main unit, an air release passage, and an air release mechanism. The passage communicates with an interior of the main unit. The air release mechanism is connected to the passage to open and close the passage. The air release mechanism includes a hollow cylindrical member, a valve seat, a valve body, a movable member, an elastic cover member, and a second communication channel. The movable member has an outer circumferential surface slidable over an inner circumferential surface of the cylindrical member and forms a first communication channel to communicate with outside air. The second communication channel has a filter structure to remove foreign substances, is formed within the cylindrical member, and is connected to a space between the cylindrical member and the cover member to communicate the first communication channel with outside air via the space and the second communication channel.

The invention relates to a water isolation type coal mine refuge chamber transition chamber and a method for entering the chamber to solve the problem of harmful gas isolation in the chamber entering process of an existing underground coal mine refuge chamber. The structure of the transition chamber comprises a chamber surrounding wall (1), a transition chamber outside door wall (2), a transition chamber middle wall (3), a transition chamber inside door wall (4), a transition chamber outside safety door (5), a water storage basin (6), a transition chamber inside safety door (7), a midfeather air-tight door (8) and a midfeather observation window (9). When entering into the chamber, a miner takes off thick and heavy outerwear, opens the refuge chamber outside safety door (5), dives into the transition chamber water storage basin (6), passes through a lower channel of a middle separation board, and then opens the inside safety door (7) to enter into a personnel survival chamber.

The invention discloses a five-cylinder electric magnetic engine, which comprises an engine body, support sleeves, connecting rods, an output shaft an a flywheel mechanism, wherein the engine body comprises a machine body and a machine cavity; the machine cavity is arranged in the machine body; the support sleeves are sleeved with the machine cavity in the machine body; permanent magnet groups are arranged between the machine body and the support sleeves; pistons are assembled in the support sleeves; a coil assembly winds one end of each piston and is fixed on each piston; the outer cylindrical surfaces of the support sleeves and the permanent magnet groups are in interference fit; the permanent magnet groups and an air cylinder body are in interference fit; the pistons and the inner cylindrical surfaces of the support sleeves are in interference fit; each piston is connected with one end of each connecting rod; the other end of each connecting rod is connected with the output shaft; the output shaft is located at the center of the machine body; the rotating center of the flywheel mechanism is connected with the output shaft; and off centers of the eccentric structure are distributed in a circumference array around the center. The five-cylinder electric magnetic engine is simple in structure, low in cost, simple and reliable in control principle, high in response speed, high in torque, environment-friendly and energy-saving; and consumption of the traditional fuel energy is reduced.

The invention relates to a pool-stove-kang-kitchen-toilet five-in-one biogas production method for rural houses in cold areas, a biogas fermentation reaction pool is established at the lower part of a heated kang in the rural house in the north, the fermentation reaction pool utilizes a wall body of a foundation for thermal insulation, and flowing flue gas which passes through the heated kang simultaneously heats the biogas fermentation pool downwards for increasing the temperature. Indoor kitchen and toilet garbage and feces are directly discharged into the biogas fermentation pool, and plant ash of a stove is added in the biogas pool for regulating the pH and providing nitrogen and phosphorus inorganic matters. A pool body is respectively connected with all feed ports, a biogas storage chamber is isolated from the biogas fermentation pool, and biogas is stored in a gas storage tank at the roof through a gas guide pipe. All the facilities of the pool-stove-kang-kitchen-toilet are arranged in the same house, thereby not only being conductive to thermal insulation and biogas production, but also being easy to feed at any time, simultaneously facilitating the use of the biogas and realizing the centralized coupling of functions.

The invention discloses an activated carbon micro hole ultra-fine dust wind power screening device. A shell, a feeding port in the top end of the shell and a discharging port in the bottom end of theshell are included. A grid plate is arranged in the feeding port. The part, extending into the shell, of the feeding port is provided with a discharging pipe. Flow guiding plates are arranged on the two sides of the discharging pipe. A material dividing cone hopper is arranged in the shell and located under the flow guiding plates, annular airflow distribution holes are formed in the two sides ofthe material dividing cone hopper, and the discharging port is located under the material dividing cone hopper. Static pressure chambers are arranged on the two sides of the shell, air inlet cavitiesare formed in the top ends of the static pressure chambers, and a draught fan is arranged on one side of the shell. The activated carbon micro hole ultra-fine dust wind power screening device is ingenious in structure, mechanical motion parts and damageable parts do not exist, and maintenance is avoided.

The invention discloses a high-efficiency energy-accumulation pressure booster which comprises at least one energy-accumulation unit, wherein the energy-accumulation unit comprises an energy-accumulation cylinder and a plurality of gas tanks. The high-efficiency energy-accumulation pressure booster is characterized in that the energy-accumulation cylinder is divided into two cavities which are independent from each other through a partition, and a piston component is arranged in the cylinder body; the piston component comprises a first piston, a second piston and a connecting rod; the first cavity is divided into a first air chamber and a first hydraulic storage chamber through the first piston; a first oil inlet and a first oil outlet are formed in the first hydraulic storage chamber; the second cavity is divided into a second air chamber and a second hydraulic storage chamber through the second piston; a second oil inlet and a second oil outlet are formed in the second hydraulic storage chamber; the first oil outlet is in control connection with an oil return tank or a hydraulic cylinder of a hydraulic machine through a first electric-control valve; the second oil outlet is in control connection with the hydraulic cylinder of the hydraulic machine through a second electric-control valve. By adopting the high-efficiency energy-accumulation pressure booster, initial pressure is reduced, an output oil pressure multiplicative effect can be achieved, danger is reduced, and equipment can be relatively conveniently maintained.

The invention discloses a microwave amplitude limiter, which comprises a waveguide and first probes, wherein the waveguide includes two opposite end faces, a waveguide cavity penetrating through the two end faces and a plurality of first through holes arranged on the side wall of the waveguide cavity, and the plurality of first through holes are arranged in a column along the longitudinal direction or arranged in a row along the transverse direction of the waveguide cavity; one end of each first probe is provided with a first tip; the waveguide cavity is provided with a first opening and a second opening respectively on the two end faces; each first through hole is internally provided with the first probe in a penetrating manner, the first probe can move back and forth along the axial direction of the corresponding first through hole, and the first tips all extend into the waveguide cavity. The microwave amplitude limiter can realize the on-line debugging of the amplitude limiting power, and is used for carrying out amplitude limiting on the microwave power.

A vacuum excrement collector control system and device thereof are disclosed. The control system comprises a program controller, the program controller is connected with a master control system, the connecting end of the master control system is connected with a regulating valve, a pressurization system, a vacuum generator and a blow-down valve, and the output end of the pressurization system is connected with a water-vapor mixed flowing-out device. The vacuum generator is connected with a storage tank, the storage tank is respectively provided with a sewage suction port and a sewage discharge port, the sewage discharge port is connected with a sewage discharge pipe, and when the vacuum excrement collector system operates, the touch program controller enables the master control system to respectively regulate and control the regulating valve, the pressurization system and the vacuum generator, the pressurization system enables the water-emulsion liquid to be sprayed out at a high speed through the water-vapor mixing and flowing-out device, oxygen is released, and dirt is discharged into the storage tank through the dirt suction opening. Compared with a traditional pump station type vacuum system, the control system and the device thereof are low in manufacturing cost, space is saved, and normal work of other toilet cubicles is not influenced when a single toilet cubicle is damaged.

The high negative pressure large flow rotary air valve includes one sucking board with two sucking openings, one back board, and one turntable closely sandwiched between the sucking board and the back board and with central shaft connected to the servo motor fixed on the back board. The back board has two air holes coaxial with the sucking openings on the sucking board separately; and the turntable is provided with one or several through holes to communicate the first air hole with the first sucking opening or the second air hole with the second sucking opening alternately. The present invention controls the opening and closing of the two air channels with the rotating middle turntable, and the resistance on the rotating turntable is less dependent on the negative pressure, resulting in high negative pressure bearing capacity and excellent separating effect. The present invention has also the features of simple structure and less faults.

The invention relates to the technical field of single-cell nucleic acid processing instruments, and discloses a single-channel single-cell nucleic acid processing instrument which comprises a rack; a moving assembly is arranged on the rack and comprises an X-axis assembly, a Z-axis assembly and a Z-axis rotating assembly, and the X-axis assembly can drive the Z-axis assembly to move in the X-axis direction; an air pump is arranged at the output end of the Z-axis assembly; a connecting piece is arranged at the tail end of the air pump and communicates with the air pump; a magnet is arranged on the air pump; and a carrying table is arranged at the output end of the Z-axis rotating assembly and located below the air pump, the Z-axis rotating assembly can drive the carrying table to rotate with the Z axis as a rotating shaft, and the moving assembly can drive the connecting piece to stretch into a disposable suction pipe so that the disposable suction pipe can be fixed to the connecting piece. The single-channel single-cell nucleic acid processing instrument disclosed by the invention has the advantages of simple structure, convenience in operation and lower requirement on air tightness.

The invention discloses a through hole polishing device for through hole polishing by utilizing negative pressure and a method thereof. The device comprises a sliding guide rail clamping assembly, a workpiece clamping assembly, an abrasive particle grinding flow circulating assembly and a sealing device, wherein the sliding guide rail clamping assembly, the workpiece clamping assembly and the abrasive particle flow circulating assembly are installed in the sealing device, a nitrogen gas vent and a nitrogen gas extraction port are formed in the sealing device, the nitrogen gas vent on the sealing device is connected with an external nitrogen generation device, and the nitrogen gas extraction port on the sealing device is connected with an external air extraction device. According to the device, a bent inner hole on the 3D printed machined workpiece can be polished by means of abrasive particle flows under the negative pressure state, automation of bend inner hole polishing is realized,the labor cost is saved, through automatic processing, higher polishing precision can be obtained, and the efficiency is greatly improved.

The invention relates to a vacuum switch on a metal enclosed column of a straight outgoing line sleeve. The vacuum switch comprises a box body and a three-phase pole post, wherein two phase bending outgoing line sleeves and a phase straight outgoing line sleeve are arranged on each of a front wall plate and a rear wall plate of the box body, the straight outgoing line sleeve and the bending outgoing line sleeves respectively comprises an insulation sleeve and a conductive rod, the conductive rod is arranged in the center of the insulation sleeve, one end of the straight outgoing line sleeve and one end of each bending outgoing line sleeve are arranged in the box body and are connected with an end part of the pole post, the other ends of the straight outgoing line sleeve and the bending outgoing line sleeves are arranged at an outer side of a wall plate of the box body, middle parts of the straight outgoing line sleeve and the bending outgoing line sleeves are fixedly arranged on the wall plate of the box body, the straight outgoing line sleeve is connected with a one-phase pole post at a middle part, a central line of the straight outgoing line sleeve is a straight line, the bending outgoing line sleeves are connected with two phase pole posts at two sides, and a central line arranged at a part of an outer side of the box body is bent towards a direction deviating from the straight outgoing line sleeve. By the vacuum switch, relatively high insulation capability is ensured, the problem of environmental protection brought by SF6 gas insulation is prevented, and the airtightrequirement on the box body is also reduced.