38results about How to "Large flow adjustment range" patented technology

The invention discloses a pilot-operated type water hydraulic pressure digital proportional direction valve, which comprises a main valve and two pilot valves, wherein the pilot valves are positioned on the left side and the right side of the main valve respectively and are arranged on the main valve through an end face in a matching way; each pilot valve comprises a variable liquid resistor and a fixed liquid resistor which is connected in series with the variable liquid resistor; a control port communicated with the end face of a valve core of the main valve is positioned between the variable liquid resistor and the fixed liquid resistor; and the pressure of the control port can be changed by changing the resistance value of the variable liquid resistor so as to control the valve core of the main valve and control the direction and the flow rate of a liquid flow. In the invention, pulse code modulation (PCM) pilot control is adopted, so that the proportional direction valve can be simply and reliably controlled, and has high precision, high frequency and long service life; and the main valve has high flow rate. The pilot valves consist of a switching valve and a damping hole, have low leakage, high pollution resistance and high interference resistance and can be used in a marine environment containing a large number of solid impurities. The valve cores of the pilot valves are driven through piezoelectric ceramics, perform amplification displacement through a compliant mechanism and have simple driving mechanism structures, quick response and long service life.

The invention discloses a double-action plunger-type deicing liquid pump for airplane deicing liquid operation. Two plunger pump cylinders in the same structure are connected into an integral body by a crank connecting link through a piston, the plunger pump cylinders are divided into two regions, and each region is provided with a non-return valve; one power source is used for driving the two plunger pumps to work simultaneously; a liquid feed channel is connected with a liquid feed non-return valve on each plunger pump cylinder; a liquid discharge channel is connected with a liquid discharge non-return valve on each plunger pump cylinder, and the outlet of the liquid discharge channel is provided with an injection gun; and the plunger pump cylinders, liquid feed channels and liquid discharge channels are made of stainless steel. Compared with single-action pumps with the same flow rate, the double integrated pumps can raise the pressure of the injected fluid and increase the injection distance. Compared with centrifugal pumps, the frictional heat of the invention generated in the working process is very low so as not to influence the viscosity of the deicing liquid, and the invention can well maintain the characteristics of the deicing liquid. The invention is mainly used as a special pump for airplane deicing liquid for deicing and anti-icing operations.

The invention discloses a fuel gas flow regulating device for a solid rocket ramjet, which comprises a main controller, a projectile body, a gas generator, and a nozzle pipe. The nozzle pipe includes a sealing plate and a hollow pipe body; There is a light hole in the axial direction of the pipe body, and a plunger slide valve is sealed and installed in the light hole, and a driving device is arranged on the plunger slide valve; N through air inlet holes are opened on the sealing plate, and the distribution of the air inlet holes is located at Within the diameter range of the pipe body, there are N-1 air inlet holes with plugging caps that can seal and block the air inlet holes, and a blasting device that can blast the caps is provided on the blocking caps; between the outer wall of the pipe body and the projectile A pressure sensor is installed in the cavity, the pressure sensor is electrically connected to the main controller, the main controller is electrically connected to the driving device; the pressure sensor is electrically connected to the blasting device. The invention enables the solid rocket ramjet to have a larger flow regulation range in both the non-choked state and the blocked state, and has the advantages of low price, precise and reliable operation, and the like.

The invention discloses an axial plunger variable pump. The axial plunger variable pump is characterized in that a sliding sleeve is mounted in a cylinder sleeve; a plunger is mounted in the sliding sleeve; holes are formed in the side surfaces of the sliding sleeve and the cylinder sleeve; the holes in the side surface of the sliding sleeve are accommodated in the holes in the side surface of the cylinder sleeve; a flange at the lower part of the sliding sleeve and an eccentric wheel frame are welded; an eccentric wheel is mounted in the eccentric wheel frame; a stepping motor is mounted on a pump body and is connected with an eccentric wheel shaft through a stepping motor coupling; a motor is mounted on the pump body and is connected with a crank shaft through a motor coupling; the crank shaft is supported on the pump body through a rolling bearing; the lower end of a connecting rod is assembled in a rod journal of the crank shaft through a connecting rod bearing shell; and the upper end of the connecting rod is in interference connection with a plunger pin. The axial plunger variable pump avoids the swash plate-sliding shoe structure and has a relatively large flow regulation range.

The invention discloses a pilot-operated type water hydraulic pressure digital proportional direction valve, which comprises a main valve and two pilot valves, wherein the pilot valves are positioned on the left side and the right side of the main valve respectively and are arranged on the main valve through an end face in a matching way; each pilot valve comprises a variable liquid resistor and a fixed liquid resistor which is connected in series with the variable liquid resistor; a control port communicated with the end face of a valve core of the main valve is positioned between the variable liquid resistor and the fixed liquid resistor; and the pressure of the control port can be changed by changing the resistance value of the variable liquid resistor so as to control the valve core of the main valve and control the direction and the flow rate of a liquid flow. In the invention, pulse code modulation (PCM) pilot control is adopted, so that the proportional direction valve can be simply and reliably controlled, and has high precision, high frequency and long service life; and the main valve has high flow rate. The pilot valves consist of a switching valve and a damping hole, have low leakage, high pollution resistance and high interference resistance and can be used in a marine environment containing a large number of solid impurities. The valve cores of the pilot valves are driven through piezoelectric ceramics, perform amplification displacement through a compliant mechanism and have simple driving mechanism structures, quick response and long service life.

The invention relates to a V-shaped valve for measuring and controlling flow, and particularly relates to a special device for accurately measuring and controlling the flow of air on a wastewater treatment and accurate aeration system. The V-shaped valve comprises a valve body, a valve plate, a valve front pipeline, a valve back pipeline and an air difference pressure transmitter, wherein the valve plate is installed in the valve body and the valve body is provided with a sealing ring. The V-shaped valve is characterized in that a positive pressure joint of the air difference pressure transmitter is connected with an inner cavity of the valve front pipeline through a positive pressure joint pipe, a negative pressure joint of the air difference pressure transmitter is connected with an inner cavity of the valve back pipeline through a negative pressure joint pipe, the valve front pipeline is arranged at the front end of the valve body, and the valve back pipeline is arranged at the back end of the valve body. The V-shaped valve is good in stability, large in flow regulation range and high in metering accuracy, and can completely satisfy the requirements of the wastewater treatment and accurate aeration system on immediate regulation of the air flow; and according to the V-shaped valve disclosed by the invention, flow variation and the opening of the valve plate show a better linear relationship, so that the V-shaped valve has good air regulation linearity.

The invention relates to a high-efficiency energy-saving single-stage high-speed centrifugal blower which comprises a high-speed gear case, a spiral case, an impeller, an air inlet body, an inlet guide vane and an inlet guide vane adjusting mechanism and is characterized by also comprising a plurality of outlet guide vanes and an outlet guide vane adjusting mechanism, wherein the plurality of outlet guide vanes are installed in the corresponding axle holes on the high-speed shaft end flange of the high-speed gear case and are evenly distributed in the radial direction, and the outlet guide vane adjusting mechanism is arranged on the shafts of the outlet guide vanes. The centrifugal blower provided by the invention has the advantage of compact and reasonable structure; the impeller is of an entire ternary structure with primary blades and secondary blades and is made of a small quantity of aluminum alloy, thus the efficiency is further improved; and simultaneously the inlet guide vane and the outlet guide vanes have wider flow adjustable ranges and maintain higher continuous adjustment efficiency within a range of 40%-100% of the rated flow, thereby being adaptable to the flow requirements under different working conditions and achieving the purpose of omnidirectional energy conservation.

The invention provides a dual fluid nozzle based on high-pressure water. The dual fluid nozzle comprises a high-pressure water pipeline and a slurry pipeline. The high-pressure water pipeline is coaxially sleeved with the slurry pipeline, flowing space of the high-pressure water is arranged in the high-pressure water pipeline, and flowing space of slurry is arranged between the slurry pipeline and the high-pressure water pipeline. The slurry pipeline communicates with a slurry inlet. A slurry nozzle is formed in the tail end of the slurry pipeline. The front end of the high-pressure water pipeline is located outside the slurry pipeline and connected with a high-pressure water source. A high-pressure water nozzle is formed in the tail end of the high-pressure water pipeline and located in the slurry nozzle. When the dual fluid nozzle is used, high-pressure water flow in the high-pressure water nozzle collides with the slurry in the slurry nozzle, and the slurry is atomized into fine slurry drops to be sprayed out of the slurry nozzle. The dual fluid nozzle is simple in design structure, large in flow adjustment range, excellent in anti-blocking performance, especially suitable for high-pressure and ultrahigh-pressure environments and capable of solving the problems that in a traditional supercritical water gasification technology, a feeding device is too high in local temperature, and a feeding port is blocked.

The invention provides a centrifugal fan with flow and temperature regulation, which is characterized in that a temperature regulation device for regulating the temperature of fluid in the centrifugal fan in a coolant heat exchange manner is arranged at an air outlet of the fan, and the temperature regulation device is arranged in the fan or at an air inlet of the fan or at the air outlet of the fan; the flow adjusting device capable of adjusting the actual flowing-through flow by adjusting the actual flowing-through area of the fluid is arranged in a mode of sealing the flowing-through area of the fluid, and the flow adjusting device is combined with the variable frequency motor for use, so that the flow adjusting range of the centrifugal fan, especially the low-frequency adjusting range, can be effectively widened; the flow of the fan can be further reduced by reducing the actual flowing area of fluid, and ideal air pressure is obtained; the temperature adjusting device for adjusting the temperature of fluid in the centrifugal fan in a coolant heat exchange mode is arranged at the air outlet of the fan, air discharged from the fan can be directly cooled, the fluid does not need to be cooled independently, and convenience and high efficiency are achieved.

The invention provides a double-adjusting-distance curtain coating head. The double-adjusting-distance curtain coating head is simple in structure, wide in curtain coating flow rate adjusting range and facilitates varnish baking work of various structures. The double-adjusting-distance curtain coating head comprises vertical mounting racks which are positioned at two sides, wherein a first die iserected on top plates of the two vertical mounting racks; the bottom parts of two ends, in the length direction, of the first die are fixedly mounted to the top plates of the corresponding vertical mounting racks; a second die is arranged close to one side of the first die; the opposite end surfaces of the second die and the first die are combined to form a rear center area oil chamber, and the center area oil chamber covers length areas in the inner sides of end plates, in the length direction, of the first die and the second die; all areas, excepting the bottom parts, in the length direction, in surface areas of the end plates of the first die and the second die are close to each other and sealed to each other; a 90-degree curtain coating cutter is arranged at the bottom part in the length direction of an oil chamber of the first die; a single curtain coating cutter is arranged at the bottom part, in the length direction, of an oil chamber of the second die; an edge surface of the single curtain coating cutter faces a vertical surface of the 90-degree curtain coating cutter in a clearance manner.

The invention provides a double-fluid external mixing type nozzle based on high-pressure water. The double-fluid external mixing type nozzle comprises a slurry pipe and multiple high-pressure water pipes. The high-pressure water pipes are arranged outside the slurry pipe in parallel and are evenly distributed in the circumferential direction of the slurry pipe. A slurry nozzle body is formed at the tail end of the slurry pipe. The tail ends of the high-pressure water pipes incline in the axis direction of the slurry pipe and are provided with high-pressure water nozzle bodies. The extending lines of the high-pressure water nozzle bodies intersect with the extending line of the slurry nozzle body. After high-pressure water flow in the high-pressure water pipes is sprayed out obliquely from the high-pressure water nozzle bodies, the high-pressure water flow collides with slurry sprayed out from the slurry nozzle body outside the nozzle, and the slurry is broken and atomized into small slurry drops under the colliding and shearing effects of the high-pressure water flow. The double-fluid external mixing type nozzle based on high-pressure water is particularly suitable for the supercritical water gasifier technology and has the beneficial effects of being good in anti-blockage performance, resistant to corrosion and high temperature and the like.

A low-pressure centrifugal coal slurry pump comprises a pump base, a water inlet elbow and a pump body. The pump body is arranged on the pump base, a pump cover is built in the pump body, a water outlet volute and a water outlet pipe are sequentially arranged at the left end of the pump cover, and the water inlet elbow, a water inlet short pipe and a water inlet pipe are sequentially arranged at the lower end of the pump cover. A pump shaft penetrates through a pump bracket and the pump body, one end of the pump shaft is connected with an impeller of the pump cover in a linkage mode, and the other end of the pump shaft is supported by two sets of bearings. Mechanical seals are arranged on the pump bracket, on the pump shaft in the pump body and between quench guide vanes and the bearings. The low-pressure centrifugal coal slurry pump meets the ISO28258 international standard and the API610 standard and is used for conveying media of which the solid content can be up to 65%, and the medium temperature is lower than or equal to 150 DEG C. New material, new technologies and high-quality accessories are adopted for a whole set of system to ensure stability and reliability of working of the system. The low-pressure centrifugal coal slurry pump has the advantages of being low in price, reasonable in structure, wide in range of flow regulation, easy to operate, convenient to assemble and disassemble and the like and can meet requirements for conveying coal slurry in the coal chemical industry and be used in the working condition of high solid content in the chemical industry.

The invention relates to a microfluidic valve. The microfluidic valve comprises a liquid inlet, an inlet runner, a shrinkage runner, a curved runner, an outlet runner, a liquid outlet, a gas inlet anda control runner. Microfluids flow in from the liquid inlet, pass through the inlet runner, the shrinkage runner, the curved runner and the outlet runner in sequence, and are drained by the liquid outlet; a current adjusting film is arranged in the inlet runner near the shrinkage runner; the microfluids extrude the current adjusting film to enable the flowing resistance of the valve to compensatethe flowing pressure so as to realize automatic and precise flow control of the fluids; a closure film is arranged between the control runner and the curved runner; compressed gas enters the controlrunner by the gas inlet; and the curved runner is totally closed through extrusion of the closure film to realize movement and stop control of the fluids. The microfluidic valve is small in size, easyto integrate, low in threshold pressure and precise in flow control, and can meet the integration demands of most microdriving devices.

The invention discloses a middle discharging section of a multi-outlet horizontal single-suction sectional multistage centrifugal pump. The middle discharging section comprises a discharging flange, a discharging section, a bracket bottom plate, a sealing ring, a spiral flow eliminating guide vane, a bracket plate and a discharging section supporting leg, wherein the discharging section is fixed on the discharging section supporting leg; a pumping chamber is arranged in the discharging section; an importing opening, a discharging opening and an exporting opening are formed in the discharging section; the importing opening and the exporting opening are respectively corresponding to an upper-stage impeller and a lower-stage impeller; the discharging opening is formed in the upper end of the discharging section and communicated with the discharging flange; the bracket bottom plate is arranged on the discharging section on the inner side of the exporting opening; the bracket plate is arranged in the pumping chamber and close to one side of the importing opening; the spiral flow eliminating guide vane is arranged on the bracket plate and extends toward the end of the bracket bottom plate; the sealing ring is matched with the inner wall of the exporting port. The middle discharging section has a function of supplying water with different pressures and flows, and is wide in flow regulation range, good in flow regime and high in efficiency.

The invention relates to a pump-injection-type fertilizer application device, which is characterized in that the pump-injection-type fertilizer application device comprises a base, a power device, a fertilizer quantity adjusting device, a cylinder body bracket, a piston cylinder and a fertilizer bucket; the power device, the fertilizer quantity adjusting device, the cylinder body bracket and the piston cylinder are arranged on the base; the fertilizer quantity adjusting device comprises a scale crank, a travel adjusting screw, a connecting rod bolt, a connecting rod and a connecting rod device, the scale crank is connected with the output end of the power device, the travel adjusting screw is engaged with the connecting rod bolt through threads, and the travel adjusting screw and the connecting rod bolt are arranged on the scale crank; the connecting rod is connected with the connecting rod bolt and the connecting rod device, the connecting rod device is arranged in the cylindrical body of the cylinder body bracket and the cylinder body of the piston cylinder is also arranged in the cylindrical body; one end of a plunger is connected with the connecting rod device, and the other end of the plunger is arranged in the cylinder body, is matched with the cylinder body, moves back and forth and is used for sucking and draining fertilizer solution; and a fertilizer solution inlet and a fertilizer solution outlet are arranged on the cylinder body, the fertilizer solution inlet is connected with the fertilizer bucket through a pipeline and the fertilizer solution outlet is connected with a fertilizer injection nozzle through a pipeline. The pump-injection-type fertilizer application device is convenient to operate and can be used as a special fertilizer application / injection device in agricultural irrigation systems or agricultural irrigation equipment such as center pivot sprinkling machines.

The invention discloses a multi-discharge-capacity reciprocating pump provided with large and small crankshafts. The multi-discharge-capacity reciprocating pump comprises a housing, a pump head component, a first piston component, a second piston component, a first crankshaft, a second crankshaft, a first connecting rod component, a second connecting rod component, a first clutching device, a second clutching device and an input shaft. The multi-discharge-capacity reciprocating pump disclosed by the invention is provided with the first crankshaft and the second crankshaft which are different in size so that the flow rate of the second piston component in work is smaller than that of the first piston component; by arranging the first clutching device and the second clutching device, the first crankshaft and the second crankshaft can work independently or simultaneously; by virtue of the first connecting rod component and the second connecting rod component. The first piston component and the second piston component can work independently or simultaneously, so the rotating speed of the pump is constant, while the flow rate can be divided into three modes including a small flow rate mode, an intermediate flow rate mode and a large flow rate mode, and thus the requirements on flow rate changes of the reciprocating pump are met, the rotating speed is constant so that the change range of a sliding speed of a sealing ring and a cylinder wall is reduced, and the service life of the reciprocating pump is prolonged.

The invention provides an adjustable pump with an adjusting device for changing an impeller inflow direction. The adjustable pump with the adjusting device for changing the impeller inflow direction comprises a driving shaft and an impeller sleeves at the driving shaft; the impeller comprises a fluid inlet channel, and both sides of the impeller are respectively provided with fluid adjusting devices; each of the fluid adjusting device comprises a main gear rotated by taking the driving shaft as an axis, a rotating rod for pushing the main gear to rotate, a secondary gear meshed with the main gear and a water baffle held in the fluid inlet channel of the impeller; the water baffle and the secondary gear are rotated synchronously.

The invention discloses a flow measurement and control device for a rhombic valve, which includes a valve body and a butterfly plate, and is characterized in that it also includes an air differential pressure transmitter, a pipeline in front of the valve and a pipeline behind the valve, the air differential pressure transmitter The positive pressure interface of the air differential pressure transmitter is connected to the inner cavity of the pipeline in front of the valve through a positive pressure connecting pipe, and the negative pressure interface of the air differential pressure transmitter is connected to the inner cavity of the pipeline behind the valve through a negative pressure connecting pipe. The pipeline in front of the valve is set At the front end of the valve body, the pipeline behind the valve is arranged at the rear end of the valve body. The flow path formed by the valve plate and the valve body is a square, and the two vertices of the square are located at the highest point and the lowest point in the opening and closing direction of the valve plate, and the maximum diagonal length is equal to that of the pipe before the valve or after the valve. pipe inner diameter. The invention has simple, compact and reasonable structure, good stability, large flow adjustment range and high metering accuracy, can fully meet the requirement of the sewage treatment precise aeration system for real-time adjustment of air flow, and has obvious energy-saving effect.

The invention provides a dual fluid nozzle based on high-pressure water. The dual fluid nozzle comprises a high-pressure water pipeline and a slurry pipeline. The high-pressure water pipeline is coaxially sleeved with the slurry pipeline, flowing space of the high-pressure water is arranged in the high-pressure water pipeline, and flowing space of slurry is arranged between the slurry pipeline and the high-pressure water pipeline. The slurry pipeline communicates with a slurry inlet. A slurry nozzle is formed in the tail end of the slurry pipeline. The front end of the high-pressure water pipeline is located outside the slurry pipeline and connected with a high-pressure water source. A high-pressure water nozzle is formed in the tail end of the high-pressure water pipeline and located in the slurry nozzle. When the dual fluid nozzle is used, high-pressure water flow in the high-pressure water nozzle collides with the slurry in the slurry nozzle, and the slurry is atomized into fine slurry drops to be sprayed out of the slurry nozzle. The dual fluid nozzle is simple in design structure, large in flow adjustment range, excellent in anti-blocking performance, especially suitable for high-pressure and ultrahigh-pressure environments and capable of solving the problems that in a traditional supercritical water gasification technology, a feeding device is too high in local temperature, and a feeding port is blocked.

The invention provides a double-fluid external mixing type nozzle based on high-pressure water. The double-fluid external mixing type nozzle comprises a slurry pipe and multiple high-pressure water pipes. The high-pressure water pipes are arranged outside the slurry pipe in parallel and are evenly distributed in the circumferential direction of the slurry pipe. A slurry nozzle body is formed at the tail end of the slurry pipe. The tail ends of the high-pressure water pipes incline in the axis direction of the slurry pipe and are provided with high-pressure water nozzle bodies. The extending lines of the high-pressure water nozzle bodies intersect with the extending line of the slurry nozzle body. After high-pressure water flow in the high-pressure water pipes is sprayed out obliquely from the high-pressure water nozzle bodies, the high-pressure water flow collides with slurry sprayed out from the slurry nozzle body outside the nozzle, and the slurry is broken and atomized into small slurry drops under the colliding and shearing effects of the high-pressure water flow. The double-fluid external mixing type nozzle based on high-pressure water is particularly suitable for the supercritical water gasifier technology and has the beneficial effects of being good in anti-blockage performance, resistant to corrosion and high temperature and the like.