19 results about "Gas pressure" patented technology

A detection device for internal combustion engines exhaust gases post-treatment systems has a casing (2, 3) housing a circuit arrangement (21, 31) including humidity sensor means (32), for measuring the humidity of the gas. The circuit arrangement further comprises temperature sensor means (33) and pressure sensor means (22), for detecting a gas temperature value and a gas pressure value, respectively. The gas temperature value can be used for compensating the humidity value obtained through the humidity sensor means (32) and the pressure value can be used for deducing the clogging degree of a filter of the post-treatment system. Preferably the pressure sensor means (22) are housed in a first chamber (8) of the casing (2-3) while the humidity sensor means (32) and the temperature sensor means (33) are housed in a second chamber (10b) of the casing (2, 3).

The invention discloses a consumable electrode gas shielded arc deposition three-dimensional printing method. The method comprises the following steps: (1) a metal component three-dimensional digital model is designed in three-dimensional software; three-dimensional printing system software is adopted to slice the three-dimensional digital model to generate multiple two-dimensional data piece layers; and a processing path is formed through analysis; (2) single layer of metal components are molded through deposition by a welding gun according to the processing path; and in the welding gun, the fuse diameter is 0.08-1.5 mm, the welding voltage is 14-20 V, the welding current is 2-20 A, the wire walking speed is 1-12 mm.s-1, the wire feeding speed is 0.5-15 mm.s-1, and the shielded gas pressure is 2-5 Mpa; and (3) after deposition molding of the single layer of metal components, a three-dimensional control platform automatically adjusts a gap between the welding gun and a newest generated surface; and the three-dimensional deposition molding of the metal components is finished after multiple times of circulation. The three-dimensional metal components, molded by the method through deposition, improve the shape precision and the surface quality, and improve the metallographic structures and the uniformity; and in addition, the method has the advantages of low cost and high deposition rate.

The invention relates to the fire extinguishing agent concentration measuring technology, in particular to a calibrating device for a fire extinguishing agent concentration measuring system. The problem that an existing fire extinguishing agent concentration measuring system is low in calibration accuracy is solved. The calibration device comprises a standard gas pressure control tank and a standard gas equally-dividing device, wherein the inlet of the standard gas pressure control tank is communicated with a standard gas generating device through a flow control valve, the standard gas equally-dividing device is provided with a containing cavity, an inlet and measuring outlets, the inlet and the measuring outlets are communicated with the containing cavity, the outlet of the standard gas pressure control tank is communicated with the inlet of the containing cavity through the outlet valve, the measuring outlets of the containing cavity are evenly distributed, and each measuring outlet is communicated with the fire extinguishing agent concentration measuring system through a measuring channel. By means of the device, the consistency and synchronism of all channel calibration sources during calibration of the special fire extinguishing agent concentration measuring system can be ensured, and therefore the final calibration accuracy of each channel is ensured, calibration efficiency is improved, and calibration expenses are saved.

The invention relates to a vertically and horizontally combined gas pressure spring, which solves the problems of complicated structure and low compressive strength of a current gas spring. The vertically and horizontally combined gas pressure spring comprises a spring body and is characterized in that the spring body comprises a plurality of vertically arranged gas column strips with pressure gas containing cavities, horizontal hollow annular gas bags are sleeved on the gas column strips, the upper end and the lower end of each gas column strip are respectively positioned and connected, and gas pressure in the containing cavities can be adjusted. The hardness of the vertically and horizontally combined gas pressure spring is conveniently adjusted by filling pressure gas, particularly, the gas pressure spring has the advantage of large deformation travel, one-way deformation range is wide, the demands of various occasions are met, and the gas pressure spring can be adjusted in real time so that comfort is enhanced. Moreover, the gas pressure spring is convenient to coil, transport cost is saved, and a user can use the gas pressure spring only by filling the gas and the unfolding the gas pressure spring. Besides, the gas pressure spring is positioned in a vertically and horizontally combined manner, so that the gas pressure spring is stressed in a balanced manner, and damage caused by unbalanced stress of unilateral bias pressure is prevented.

The invention provides an integrated bioreactor for adherent cell culture. The bioreactor comprises a regulation and control system, a reaction vessel body and a cell culture unit which are sequentially connected and internally communicated with one another; the regulation and control system is provided with a gas pressure balance hole and a liquid dropping hole, the cell culture unit is providedwith a central flow guiding hole and a liquid level monitoring hole, and the gas pressure balance hole and the liquid level monitoring hole are communicated with each other through a pipeline to forma liquid level sensor; the bioreactor further comprises a cell suspension bottle, one end of the central flow guiding hole is communicated with the liquid dropping hole through a pipeline, and the other end of the central flow guiding hole is communicated with the cell suspension bottle through a pipeline. The integrated bioreactor successfully exchanges and circulates culture mediums of the cellculture unit and the regulation and control system, and the unified regulation and control over the pH value and the dissolved oxygen value of each unit culture medium are successfully achieved; the laminar flow shear force and liquid level of the cell culture unit are also regulated and controlled.

The invention discloses a lifting type interlayer vacuum liquid storage device, and relates to the field of liquid storage. The device comprises an upper cover, wherein the lower end of the upper cover is connected with a connecting body, the lower end of the connecting body is connected with a liquid storage tank, a limiting ring is arranged in the middle of the inner side wall of the connectingbody, and a rubber pad is arranged on the lower surface of the limiting ring; and a set of lifting handles are symmetrically arranged at the two ends of the outer side wall of the liquid storage tank,and a piston column is arranged on the inner side of the liquid storage tank. The device is convenient to disassemble and assemble, the inner wall of the storage tank can be cleaned conveniently, theproblem that dead corners of a tank body are not easy to clean is solved, residual liquid is prevented from contaminating the tank wall of the storage tank, the stored liquid can be absorbed and drained by moving the piston column, and the problem that material taking of the storage tank is inconvenient is solved; and gas above the storage tank is pumped out through a miniature vacuum gas pump, the gas pressure in the tank body can be lower than one atmospheric pressure, liquid is made to be in a vacuum environment, and then the liquid can be better protected.

The invention discloses a sulfur hexafluoride decomposition product gas pressure monitoring device based on gas in-situ detection. The device comprises a gas circuit part, a detection part and a power supply part; the gas circuit part comprises a gas supplementing pipeline, a gas using pipeline, a testing pipeline, a reference pressure inflation valve, a reference pressure locking valve and a reference pressure cavity; the detection part comprises a differential pressure sensor, a differential pressure display meter, a pressure sensor and a reference pressure display meter; and the power supply part supplies power to the detection part. In a transformer substation field environment with violent temperature and humidity changes, the pressure of SF6 gas components can be continuously monitored for a long time under the condition that the operation state of SF6 gas insulation equipment is not interfered, so that a corresponding test basis is provided for perfecting an SF6 decomposition theory and a chemical diagnosis technology of electrical equipment.

The invention discloses a testing device and a method for determining system uniformity by using a near-infrared spectrometer. The method comprises the following steps: testing a solid-liquid-gas phase mixture 5 by using the near-infrared spectrometer, determining that the solid-liquid-gas phase mixture 5 is uniform when the highest peak difference is within 0.95%, marking the position of the upper end surface of isobaric liquid 6, and heating the solid-liquid-gas phase mixture 5 to a set temperature, so that the upper end surface of the isobaric liquid 6 moves upwards gradually; rotating a piston 7, enabling the seventh lower end circular plane of the piston 7 to move downwards, and compressing the space of an isobaric gas 8. According to the method, gelatinized solid-liquid-gas phase mixture volume expension pressure is converted into elementary substance liquid pressure, and converted into elementary substance gas pressure. Therefore, the measurement of the volume expansion pressureof the gelatinized solid-liquid-gas phase mixture is realized.

The invention discloses an engine lubricating oil supply device. The engine lubricating oil supply device comprises an engine box body, and an additional oil tank, wherein the top of the additional oil tank is connected with a gas vent of the engine box body through a connecting pipeline; the lowest part of the additional oil tank is connected with an oil discharge screw hole of the engine box body through a connecting pipeline, so that the engine box body internally communicates with the additional oil box; and gas pressure in the engine box body is the same with that in the additional oil tank. After the additional oil tank communicates with the engine box body, volume of lubricating oil contained in the engine box body is increased; the top of the additional oil tank is connected with the gas vent of the engine box body, and the lowest part of the additional oil box is connected with the oil discharge screw hole of the engine box body; gas pressure in the engine box body is the samewith that in the additional oil tank; liquid level of lubricating oil in the engine box body is the same with liquid level of lubricating oil in the additional oil tank; when the engine just operates, lubricating oil consumption and liquid level in the engine box body are reduced; and as a result of gas pressure changes, lubricating oil in the additional oil tank enters the engine box body, so that capacity of lubricating oil in the engine box body is kept.

The invention relates to the technical field of liquid level measurement, in particular to a differential pressure principle non-contact type liquid level sensor, the surface of an air chamber is fixedly connected with an air pipe, according to the principle that air pressure in a closed space is equal, different liquid levels are adopted for dividing the closed space into a plurality of closed spaces, and the liquid level detection function is achieved; the liquid level sensor not only can detect pure liquid with constant density, but also can detect non-pure liquid with uncertain density, such as a solid-liquid mixture, is particularly suitable for occasions with relatively high requirements on the relative detection precision of the liquid level in a mixed dirt discharge container, and well solves the problems that a contact type liquid level sensor is high in failure rate and low in detection precision. The liquid level sensor solves the problem that a conventional non-contact liquid level sensor cannot be installed due to a special use environment, is simple in structure and is not in contact with liquid to be detected, so that the production cost of the sensor is reduced, product faults caused by solid-liquid mixing are avoided, the product reliability is greatly improved, and the product quality is improved. And the use and maintenance cost of the product is greatly reduced.

The invention discloses a high-sensitivity pressure-limiting air valve of a truck air pump and belongs to the field of automobile parts. A conical lower cover with a large opening facing upwards is installed on a pipe joint, a disc-shaped rubber pad is installed on the lower cover, a cylindrical plastic push rod is vertically installed in the center of the bottom of the rubber pad, and a spiral pressure spring is installed between the lower portion of the interior of the lower cover and the bottom of the rubber pad. A conical upper cover of which the edge with a large opening facing downwards is meshed with the upper part of the lower cover is arranged on the rubber pad, and an upper cover external thread is arranged at the top end of the upper cover; when the air pump enables the pressure of air filled into the air storage tank to reach the upper limit, the air storage tank inputs air pressure into the upper cover through an air return pipe, the air pressure pushes a rubber pad to move downwards to compress a pressure spring and pushes a plastic push rod downwards to abut against an air inlet valve piece of the air pump downwards, and the air inlet valve piece of the air pump cannot be closed; therefore, the air pump cannot normally inflate air.

The invention relates to a thermal shoe. The thermal shoe comprises a sole, a vamp, a shoe tube, a heating device, a circulation groove, a waterproof layer, an exhaust groove, a blocking sheet, a protective soft board, a groove, a micro cylinder, a water storage tank, a gas permeable membrane, a water injection tank, a bucket and a first magnetic block, wherein when the bucket closes an opening ofthe water injection tank, the bucket and the sole are squeezed; after the heating device is started, water in a water outlet groove is heated to be evaporated to form water vapor passing through thegas permeable membrane and entering the circulation groove, since the specific heat capacity of the water is larger, a warm state can be maintained for a long time, and since the water vapor increases, the gas pressure can increase to jack up the blocking sheet, therefore the water vapor escapes from the shoe tube; the water in the water outlet groove needs to be supplemented regularly, the bucketis rotated, thereby putting the water into space formed by the bucket, then the bucket is rotated to transfer the water into the water injection tank; the first magnetic block can enhance the connection strength between the bucket and the sole and enhance the sealing property.