188results about How to "Guaranteed pressure balance" patented technology

The invention discloses a dilution sampling system and a sampling method of fixed source particles and volatile organic compounds, and belongs to the technical field of environmental monitoring. The dilution sampling system comprises a smoke introducing system, a diluting system, a stopping chamber, a sample collection system and a control and data collection system. The system can simulate the nucleation, condensation and coagulation processes of the fixed source smoke after being discharged to the atmosphere, can adopt a grain size classification sampling method of atmospheric particulate matters to sample the particulate matters, can adopt the atmospheric volatile organic matter sampling method to sample the volatile organic matters, and can realize the dynamic control of dilution ratio and the dynamic stopping time. Each part of the system has the advantages of high integration, high stability, automation in control, and easiness in operation.

The invention discloses a pneumatic conveying device, which comprises a bin pump and a delivery duct. The driving air inlet of the bin pump is connected with a bin pump cone and is in the same central line with the discharging hole of the bin pump. The diameter of the delivery duct is increased gradually. The device also comprises at least one air make-up duct. The air make-up duct is provided with a plurality of openings circumferentially distributed along the inner wall of the delivery duct. The opening direction is consistent with the flowing direction of a solid-gas mixture. The working process comprises three steps, namely feeding, fluidifying and adjusting the flow rate of the solid-gas mixture. Air is introduced into the delivery duct by the air make-up duct to adjust pressure in the delivery duct and adjust the flow velocity of solid-gas mixture so as to ensure that the solid-gas mixture has proper flow velocity, thus lowering the wear rate of the delivery duct, reducing the possibility of delivery duct blockage, and ensuring the working reliability of the pneumatic conveyer.

The invention discloses a protecting device for a forward water hammer, which comprises a main body device and an automatic control system, wherein the main body device comprises a straight pipe, a buffer pipe, a connection pipe, an air valve, a pressure fluctuation pre-stop valve, a drain pipe, an air supply pipe and an air supply gate valve; the two ends of the buffer pipe are sealed and blocked; the buffer pipe is above the straight pipe; a lateral wall at the middle part of the buffer pipe is connected with the lateral wall at the middle pipe of the straight pipe through a connection pipe; the air valve is arranged on the buffer pipe; the drain pipe is arranged on the lateral wall of the buffer pipe through the pressure fluctuation pre-stop valve; the air supply pipe is arranged on the lateral wall of the buffer pipe through the air supply gate valve; the automatic control system comprises a pressure transmitter, a control box, a control cable and a signal cable; the pressure transmitter is arranged at a water outlet end of the straight pipe, and the pressure transmitter and the pressure fluctuation pre-stop valve are respectively connected with the control box through the signal cable and the control cable. According to the protecting device for the forward water hammer, the forward water hammer is effectively protected or weakened; particularly, the protecting device forthe forward water hammer is suitable for a long-distance water pipeline, and has the characteristics of being effective in protection, simple in structure, easy in production, convenient in installation, safe and stable, small in floor area, less in investment and the like.

The invention provides a radial oxygen production adsorption tower, belongs to the technical field of mechanical equipment, and solves the technical problems of too small height-diameter ratio, too large occupied floor space, non-uniform adsorption and the like in the prior art. The oxygen production adsorption tower comprises a cylindrical tower body, an gas inlet assembly disposed at the bottom of the tower body, an gas outlet assembly disposed at the top of the adsorption assembly, an adsorption assembly disposed in the tower body and a circular gas transportation cavity formed between the inner wall of the tower body and the outer wall of the adsorption wall, wherein the gas inlet assembly is provided with a circular gas vent disposed at the periphery of the lower end of the adsorption assembly; the circular gas vent is communicated with the gas transportation cavity; a gas flow can be transported to the adsorption assembly radially by the gas transportation cavity; two ends of the adsorption assembly are sealed; the center of the adsorption assembly is provided with a gas collection channel for collecting finished product oxygen; the lower end of the gas collection channel is sealed; and the upper end of the gas collection channel is communicated with the gas outlet assembly. The radial oxygen production adsorption tower has the advantages of uniform adsorption, high adsorption efficiency, small occupied floor space, large-scale designability, etc.

The invention provides a production system of germanium tetrachloride for optical fiber. The production system of germanium tetrachloride for the optical fiber comprises at least two rectification units. The rectification units are connected with each other in series. Each of the rectification units comprises a rectifying still, a rectifying tower, a primary condensing tower, a secondary condensing tower, a discharging head, a primary exhaust gas absorption device, a secondary exhaust gas absorption device and a exhaust gas treatment device. The secondary exhaust gas absorption device is communicated with the primary exhaust gas absorption device. The exhaust gas treatment device is communicated with the secondary exhaust gas absorption device. The production system of germanium tetrachloride for the optical fiber improves the rectifying purity of the germanium tetrachloride for the optical fiber enormously by arranging a plurality of rectification units and improves the reliability of the sealing and maintains the pressure balance in the system by arranging the primary exhaust gas absorption device and the secondary exhaust gas absorption device and can evacuate the exhaust gas finally produced by the production system through the exhaust gas treatment device by arranging the exhaust gas treatment device.

The invention relates to a gas flow test device based on piston working principle. The existing device is suitable for large flow test, but is inconvenient to use and inaccurate in measuring result when measuring small flow. The invention comprises a frame, a cylinder, a motor and a measurement and control system, wherein the cylinder, the motor and the measurement and control system are arranged on the frame and the motor drives the piston in the cylinder. The invention is characterized in that the piston is of bell shape, a column-shaped piston is formed at the middle of the bell-shaped piston, the cylinder comprises an inner gas chamber and an outer gas chamber, the column-shaped piston is inserted into the inner gas chamber, the inner gas chamber and the outer gas chamber are connected via a gas outlet pipe arranged outside the cylinder, the gas outlet pipe is connected with a detected flowmeter, the inner gas chamber and the outer gas chamber are respectively connected with an external gas duct, and the gas duct and the gas outlet pipe are respectively provided with a flow controller. The invention is designed to optimize chamber structure in the cylinder to match with the dual pistons, and measurement is realized by selecting the corresponding piston according to different measurement need, thus improving measurement accuracy and expanding application range.

The invention provides an atomic layer deposition system. The atomic layer deposition system is characterized in that a precursor source is connected with one end of a carrier gas pipeline and one endof a precursor gas pipeline, carrier gas in the carrier gas pipeline passes through the carrier gas pipeline and flows through the precursor source, the carrier gas carries precursor and flows alongthe precursor gas pipeline, one end of a dilution gas pipeline is connected with a reaction chamber, the other end of the precursor gas pipeline is connected to the side, close to the reaction chamber, of the dilution gas pipeline, and therefore, the carrier gas carrying precursor is mixed with the dilution gas, passes through one end of the dilution gas pipeline and flows into the reaction chamber; one end of a pressure balance pipeline is connected with the dilution gas pipeline, and the other end of the pressure balance pipeline is connected with the carrier gas pipeline, so that when precursor gas is not conveyed into the reaction chamber, carrier gas flows to the dilution gas pipeline from the carrier gas pipeline, waste of precursor is reduced, meanwhile, the carrier gas is mixed with the dilution gas and then enters the reaction chamber, and pressure balance and technology stability of the reaction chamber are ensured.

The present invention relates to a buoy system. The buoy system comprises: a buoy body; and an anchoring device, which is arranged below the buoy body and used for stabilizing the buoy body. The buoybody comprises a main cabin body, wherein the anchoring device is arranged at the bottom of the main cabin body; masts, which are arranged on a plurality of brackets above the main cabin body and surround the side surface of the main cabin body; and a plurality of outer wall assemblies, which are fixed to the brackets and fixed to the outer side edge of the main cabin body, wherein a closed floating chamber is defined by the outer wall assemblies, the brackets and the side face of the main cabin body. Structural modularization is achieved, the production process is simplified, transportation,loading and unloading are convenient, small and medium-sized fishing boats and engineering ships can be used for throwing and recycling, the ship using cost is reduced, the internal space structure ofthe buoy is optimized, various devices can be installed in the buoy, and the monitoring requirement is met.

Disclosed is an internal top-mounting type super-high pressure super-low temperature hard sealing ball valve, which is mainly composed of a valve body (1), a valve cover (24), a ball body with a handle (3), a valve seat (13), a rear valve seat (10), a valve rod bearing seat (16) and the like. The ball body with a handle (3) placed in the valve body (1) penetrates through the center of the valve cover (24), and the ball body with a handle (3) is enabled to rotate 90 degrees by an external force to realize the opening and the closing of pipes. The sphere sealing is realized by that two sides of the ball body with a handle (3) hold the rear valve seat (10) and the valve seat (13), and a valve seat spring (12) elastically pushes and presses the ball body with a handle (3). The sealing of a valve rod employs a unique three-ply sealing structure of a self-sealing preloading device, which can guarantee sealing under low pressure, and under the action of high pressure, medium pressure action realizes self-sealing for a bearing ring (17), thereby avoiding that filling material sealing needs the high-strength pressure, and the torque becomes extremely large when the valve rod is opened.

The present invention relates to post treating method and device for producing weak alkaline high purity drinking water. Weak alkaline no-salt water and ozone gas are made to enter first to the Venturi mixer and ozone absorption tower for ozone sterilization and then to a gas-water separating tower to separate out and exhaust ozone containing gas; and the separated water is filtered in the first stage filter to eliminate microbe and suspended matter, active carbon tank to eliminate organic matter and bad smell, and the second stage filter to eliminate residue and obtain weak alkaline high purity drinking water. The whole process is completed inside one closed system with balanced pressure to eliminate foreign matters effectively.

The invention discloses an energy-saving environment-friendly circulation type waste gas treatment method applied to a paint spraying and paint baking process. The method comprises the steps of paintspraying stage waste gas treatment, levelling stage waste gas treatment and drying stage waste gas treatment; during the drying stage waste gas treatment, after the levelling is completed, the operation enters the drying stage; waste gas in a drying chamber is taken away by gas exchange equipment; the taken waste gas is filtered and dried; the treated waste gas flows back into the drying chamber to form circulation airflow; when the concentration of organic volatile gas is high, and is lower than the lower explosive limit by 25 percent, a small part of high-concentration waste gas is extractedfrom the circulation airflow; heating and low-temperature catalytic oxidation are performed to form high-temperature combustion waste gas; after the high-temperature combustion waste gas and most circulation airflow are subjected to heat exchange, freeze drying and adsorption are performed; the waste gas is exhausted into atmosphere after reaching the standard. After the method is used, the wastegas can be thoroughly treated as much as possible; the discharging total quantity is reduced to the greatest degree; the resource utilization rate is improved; the effects of energy saving and environment protection are really achieved.

The invention discloses a sealing cabinet capable of balancing pressure in a self-manner, which is mainly used for guaranteeing to balance the pressure inside and outside the sealing cabinet, isolating the gas exchange inside and outside of the cabinet and protecting the internal members. The part of the prior art usually adopts a sealing cabinet mode, and when the device is in a live working condition in the high temperature environment or in the low temperature environment, an atmosphere pressure difference is generated between the inside and the outside of the sealing cabinet, so that the strength of the sealing cabinet and the pressure resistance levels of the film button, the liquid crystal display or other members are needed to be improved. The sealing cabinet disclosed by the invention employs a combination mode of an air bag to cooperating with a vent pipeline, and integrates the balance of the inside and the outside pressure of the sealing cabinet, and utilizes the temperature to change the pressure. The pressure acts on the gas and then enables the air bag to automatically inflate and deflate, which can automatically adjust the air pressure of the inside and outside of the sealing cabinet. The sealing cabinet which is capable of balancing pressure in the self-manner and is provided with a specially-produced air bag is characterized by sealing and waterproof, electromagnetic shielding, simple structure, and good versatility.

The invention relates to a printing head self-adaptive structure of an intelligent label printer. The printing head self-adaptive structure comprises a poking rod, a sliding block, a decompression torsional spring, a pressurizing spring, a printing module framework back plate, a rotating plate, a rubber covered roller, a heat dissipation plate and a printing head which are arranged in a printer body, the heat dissipation plate is a bent plate and comprises a first connecting part used for being connected with a rotating plate and a second connecting part used for being connected with a printing head, the first connecting part is fixed to the rotating plate through a rotating shaft, and the second connecting part is tightly attached to the printing head and fixedly connected with the printing head. In the pressurizing process of the printing head, factors such as parallelism of the heat dissipation plate and the rubber covered roller do not need to be considered, point contact after being pressed is self-adaptive to line contact, a pressed point is a midpoint of the line contact, and pressure balance of the printing head and the rubber covered roller at all positions of the contactposition is guaranteed.

The invention relates to an extrusion device for a dry type granulator. The extrusion device comprises an upper tank body, a lower tank body, an extrusion wheel 1, an extrusion wheel 2, a hydraulic cylinder block, a hydraulic cylinder and a hydraulic control system, wherein the hydraulic cylinder block is assembled above the lower tank body; the upper tank body is arranged between the lower tank body and the hydraulic cylinder block; the extrusion wheel 1 is assembled on the lower tank body; the extrusion wheel 2 is assembled on the upper tank body; one end of the hydraulic cylinder is assembled on the hydraulic cylinder block; the other end of the hydraulic cylinder is connected with the upper tank body; the hydraulic cylinder is provided with an oil inlet end 1 and an oil inlet end 2; the hydraulic control system comprises an oil tank, a hydraulic pump and a direction valve, which are sequentially connected in series; the direction valve is connected with the oil inlet end 1 and the oil inlet end 2; a branch circuit composed of a pressure transmitter, a control valve and an energy accumulator is connected between the hydraulic cylinder and the direction valve in parallel; the pressure transmitter is used for collecting the pressure of the hydraulic cylinder and feeding the pressure back to the control valve; and the control valve is used for controlling opening and closing of the energy accumulator to supplement or release the pressure of hydraulic oil, thus automatic pressure supplement and automatic clearance adjustment of the extrusion device are achieved; and the extruded material is relatively uniform in thickness and compactness.

The invention discloses a method for removing inorganic salt in L-alanine fermented material liquid. The method comprises the steps that the L-alanine fermented material liquid is filtered; thalli and macromolecular protein in the fermented liquid are removed; L-alanine ultrafiltration clear liquid is obtained; the respective water injection flow rate of a fresh water pump, a concentrated water pump and an electrode water pump is controlled, so that the pressure balance in a fresh water chamber, a concentrated water chamber and an electrode water chamber is ensured; the L-alanine ultrafiltration clear liquid is subjected to electrodialytic treatment under the constant current density condition until the membrane pack voltage is stabilized to be 30 to 50V; the electrical conductivity of L-alanine fermented clear liquid is 3000 to 10000 muS/cm; when the L-alanine loss rate is 8 to 12 percent, the electrodialysis is finished. The method has the advantages that the electrodialysis is used for treating material liquid in the process of producing L-alanine by a fermentation method; saline matters such as ammonium salt, phosphate, calcium salt and magnesium salt can be effectively removed, so that the purity and the quality of L-alanine products are improved.

The invention relates to a crane, and particularly relates to a hydraulic system of a crane for vessel operation and a working method. The hydraulic system of the crane comprises a fuel tank, a gyrating system for driving a gyrating platform, a brake system, a cooling system for decreasing the oil temperature, an oil supplementing system for supplementing oil, and an emergency gyrating system which is started in case of fault. According to the hydraulic system of the crane and the working method, the gyrating system is a closed hydraulic system, so that the energy utilization rate is high; theoil supplementing system is arranged and used for supplementing consumed hydraulic oil of the closed hydraulic system; a brake shuttle valve is arranged in the brake system; a normal brake system isconnected to a brake oil channel of a hydraulic emergency system, thus realizing a two-input and one-output brake system, and as a result, the safety is improved; the cooling system is arranged and used for cooling a hydraulic pump set, so that the probability of failure of the hydraulic pump set can be reduced; and the hydraulic emergency system is provided, so that the safety of the crane is improved.

A fuel cell provides for rapid pressure equalization across the proton exchange membrane by means of an expansion chamber on one side of the proton exchange membrane, the expansion chamber communicating with the gas on the other side of the membrane. Changes in size of the expansion chamber adjust pressure more rapidly than external control of flow rates.

The invention discloses a powder preheating device for SLM equipment. The powder preheating device for the SLM equipment comprises a forming cylinder, a Z-axis lifting forming frame is arranged in theforming cylinder, a heat insulation plate is arranged on the upper surface of the Z-axis lifting forming frame, a heating plate is arranged on the upper surface of the heat insulation plate, and a substrate is arranged on the upper surface of the heating plate; and the powder preheating device for the SLM equipment further comprises a liquid heating temperature control device, a forming cylinderinner flow channel is embedded into the side wall of the forming cylinder, the two ends of the forming cylinder inner flow channel are connected with an inlet and an outlet of the liquid heating temperature control device, a heating flow channel is embedded into the substrate or the heating plate, and the two ends of the heating flow channel are also connected with the inlet and the outlet of theliquid heating temperature control device. According to the powder preheating device for the SLM equipment, a liquid heating mode is adopted, safe constant-temperature heating can be achieved, and a short circuit and the risk that metal powder is detonated to cause explosion are avoided. The invention further discloses a working method of the powder preheating device.