537results about How to "Small pressure loss" patented technology

The invention belongs to the technical field of power station boiler waste heat recycling energy-saving equipment and relates to a plate-and-shell type coal economizer. The plate-and-shell type coal economizer comprises a corrugated plate heat exchange core body (1), a heat exchanger shell (2), a first and a second water inlet / outlet water tank (3, 3') and a first and a second exhaust gas inlet / outlet pipeline (4, 4'), wherein the corrugated plate heat exchange core body (1) is mounted in the heat exchanger shell (2), the first and second water inlet / outlet water tanks (3, 3') are respectively arranged at the upper and lower ends of the front side of the corrugated plate heat exchange core body (1), and the first and second exhaust gas inlet / outlet pipelines (4, 4') are respectively arranged at the upper and lower sides of the corrugated plate heat exchange core body (1). The plate-and-shell type coal economizer solves the problem that the length of a water passage needs to be increased to solve the problem of unapparent water heating due to the great difference between an exhaust gas density and a water density, and meanwhile, a corrugated passage at the exhaust gas side enables the exhaust gas flow turbulivity to be increased and the heat transfer efficiency to be improved; the blockage due to ash accumulation happens rarely, even if the ash is accumulated, the cleaning is easy to finish.

The rotary cross-flow ceramic membrane filtering device comprises a shell, a main shaft unit arranged in the shell and a power unit for driving the main shaft unit to rotate, the power unit provides rotating power for the main shaft unit and drives the filtering disc to rotate, the main shaft unit is installed in the shell and executes a specific filtering task, and the shell provides necessary support and protection for the main shaft unit and the power unit and controls inflow and outflow of materials. According to the rotary cross-flow ceramic membrane filtering device provided by the invention, the ceramic membrane filtering disc is arranged, so that the filtering efficiency and the system stability are improved, the operation cost is reduced, and the rotary cross-flow ceramic membrane filtering device is suitable for being widely applied to various industrial fields needing efficient filtering solutions.

The invention designs a linear heave compensation device based on a composite cylinder, belongs to the technical field of ocean engineering equipment, adopts a heave compensation scheme of a double-composite-cylinder structure comprising a heave compensation execution cylinder and an integrated control cylinder, and is provided with a plurality of functional cavities; the working gas cylinder group is communicated with a rod cavity of the heave compensation execution cylinder through the gas-liquid converter to provide passive compensation force for the heave compensation execution cylinder; oil is alternately supplied to inner cavities of the two composite cylinders in a control mode of direct driving of the two-way variable pump, and active compensation force is provided for the heave compensation execution cylinder; for an underwater high-pressure environment, deepwater pressure acts on a piston rod of the integrated control cylinder and a piston rod of the heave compensation execution cylinder at the same time, and the water depth compensation function is achieved through offset of internal pressure of the double cylinders. Multiple functions such as passive compensation, active compensation and water depth compensation are achieved, multiple working condition operations such as water, splash zone passing and landing can be continuously completed, the two-way variable pump is adopted to directly drive the compensation execution cylinder, the response speed and the control precision are improved, and the beneficial effects of being low in energy consumption, compact in structure, integrated in multiple functions and the like are achieved.

The invention discloses a picture mounting metal outer frame laser cutting machine with a dust removal structure, and belongs to the technical field of laser cutting. The picture mounting metal outer frame laser cutting machine comprises a workbench and a portal frame capable of moving in the length direction of the workbench; a plurality of placement blocks are uniformly arranged on the upper surface of the workbench in the length direction, placement grooves are formed in the placement blocks, an air suction purification mechanism is arranged on the portal frame and comprises two air suction pipes, and one ends of the two air suction pipes penetrate through the two sides of the portal frame correspondingly to be connected with air suction hoods; circular dustproof nets are arranged on the sides, close to each other, of the two air suction hoods; during cutting, according to different cutting directions, harmful gas generated by cutting can be effectively adsorbed and purified, metal dust is recycled, pollution to equipment and the environment is reduced, and resource waste is reduced.

The invention belongs to the field of flow heat transfer testing devices and the technical field of semiconductor chip and integrated circuit packaging heat dissipation, particularly relates to a flow heat transfer testing device and method for a 3DIC, and aims to solve the problem of heat management experiment testing of a 3DIC structure under the condition of high heat flux. The device comprises alternately stacked open type heating sheet slots, micro-channel modules, MCH ceramic heating sheets, interlayer communication columns, a flow distributor and a plurality of temperature measuring elements. Through a reasonably designed fluid distribution system and a precise heat conduction structure, an equivalent substitution experiment scheme of a real 3DIC is realized, the problem of small-space temperature measurement point and heat source arrangement is solved, and the problems of non-uniform flow distribution of gas-liquid two-phase flow in a variable cross-section sub-runner and the like are solved. The device has a real-time temperature monitoring capability, is suitable for thermal management research and multiphase flow pattern observation of 3DIC, and provides a scientific basis for optimization design and performance improvement.

The invention relates to a single-side gas inlet SOFC burner with wide working condition and low pressure loss in the field of solid oxide fuel cells. An ignition rod sleeve for arranging an ignition rod is arranged in the middle of the top of a combustion chamber of the single-side gas inlet SOFC burner; the top of the combustion chamber is further provided with an anode tail gas distribution channel and a cathode tail gas distribution channel, and the anode tail gas distribution channel and the cathode tail gas distribution channel are sequentially arranged on the periphery of the ignition rod sleeve in a surrounding mode. And cathode tail gas and anode tail gas are uniformly introduced into the combustion chamber in a ring-surface-shaped gas outlet manner after passing through respective independent distribution channels. The anode tail gas and the cathode tail gas are evenly input into the combustion chamber in an annular mode, the consistent flow density is kept on the annular face, the two kinds of tail gas are fully mixed in the combustion chamber, the ignition rod conducts centered ignition, flame deflection is avoided, local overheating is reduced, the stable combustion state is achieved, and stable combustion within the wide working condition range can be achieved easily; and the pressure loss caused by non-uniform gas distribution is reduced.

The invention relates to a porous carbon felt structure which comprises a carbon felt plate, a plurality of porous channels are formed in the carbon felt plate, and the axes of the porous channels are perpendicular to the flow direction of electrolyte on the carbon felt plate and parallel to the thickness direction of the carbon felt plate; a long-strip-shaped flow channel parallel to the flow direction of electrolyte is arranged on a traditional carbon felt plate, the proportion of a low-flow-speed area is 78.01%, according to the pore channel carbon felt structure, the pore channels perpendicular to the flow direction of the electrolyte are arranged on the carbon felt plate to serve as the flow channels, the proportion of the low-flow-speed area is reduced to 6.12%, the pressure loss of the electrolyte flowing on the carbon felt plate is effectively reduced, and the service life of the carbon felt plate is prolonged. The flow velocity of the electrolyte on the carbon felt plate is improved, and the uniformity of flow velocity distribution is also remarkably improved.

The invention belongs to the technical field of natural gas extraction, and particularly relates to an underground axial-flow type gas compressor. The underground axial-flow type gas compressor comprises multiple stages of stators which are coaxially fixed side by side in the axial direction, and an inlet and an outlet are formed in the two axial ends of each stator; the main shaft is coaxially and rotatably arranged in the stator; the rotors are coaxially and fixedly arranged on the main shaft in the axial direction, and the rotors correspond to the stators in a one-to-one mode. The device can be placed underground, and the productivity of a gas well is improved.

The invention relates to the technical field of electronic information, and discloses a scale-like fin type micro-channel cold plate with a secondary channel. A first flowing channel is formed in the cold plate body; the fin plates are sequentially laid in the first flowing channel in the first direction, a plurality of fish scale-shaped protrusions are sequentially arranged on the two side faces of each fin plate in the flowing direction of the cooling liquid in a staggered mode, and the section of each fish scale-shaped protrusion is of a semi-oval structure; fish scale-shaped grooves are formed in the other side surfaces, corresponding to the fish scale-shaped bulges, of the fin plates; and each second flow channel is formed between every two adjacent fin plates. According to the fish scale-like fin type micro-channel cold plate containing the secondary channels, the flowing pressure of cooling liquid in the micro-channels is reduced, a boundary layer is broken, the heat dissipation temperature of the cold plate is uniform, and meanwhile the heat dissipation efficiency is improved.

The utility model discloses a ducted fan, which belongs to the technical field of aviation ducted fan engines, and comprises an annular duct, a plurality of blades and a plurality of blades, the fan blades are arranged in the annular duct, blade tip arc surfaces are arranged at the blade tips of the fan blades, and blowing gaps are formed in the sides, close to the suction surfaces, of the fan blades; the fan blades are fixedly connected to the outer side of the fan shaft; the driving part is used for driving the fan shaft to rotate, and the driving part is arranged on the rear side of the annular duct; the ratio of the height of the air blowing seam to the diameter of the arc surface of the blade tip is set to be 0.01-0.05; an air flow channel is formed in the fan blade and communicates with the air blowing seam. The number of the fan blades is two or more. The interior of the fan shaft is of a hollow structure. According to the utility model, the blade top clearance leakage flow is reduced by blowing at the top ends of the blades, so that the propulsion efficiency of the ducted fan is improved.

The invention provides a gas metering valve with a pressure stabilizing function, which comprises a valve seat, a valve cover, a pressure reducing valve module, a metering module and a pilot-operated cut-off valve module, the pressure reducing valve module is arranged in the middle of the valve seat, and the upper end of the pressure reducing valve module is sealed by the valve cover; the two metering modules are symmetrically arranged on the two sides of the pressure reducing valve module. A pilot-operated type stop valve module is arranged on the side face of the valve seat between the two metering modules, an air inlet is formed in the valve seat close to the pilot-operated type stop valve module, and an air outlet is formed in the valve seat far away from the pilot-operated type stop valve module. The gas metering valve integrates the functions of a pressure reducing valve, a metering valve and a stop valve, the pressure loss between the pressure reducing valve and the metering valve is greatly reduced technically, and meanwhile, the cost of customers is also reduced.

The invention relates to bidirectional bell and spigot joint pipeline manufacturing equipment and a bidirectional bell and spigot joint pipeline. The bidirectional bell and spigot joint pipeline manufacturing equipment comprises a main machine body; the two groups of lining pipe displacement mechanisms are symmetrically arranged on the main machine body to adjust the positions of the lining pipes and respectively drive the corresponding lining pipes to rotate; the hot melt adhesive coating device is used for coating hot melt adhesive on the lining pipe on the lining pipe displacement mechanism; the outer liner tube grasping assembly is arranged on the main machine body in a sliding manner, grasps the outer liner tube and drives the outer liner tube to slide; the pressing mechanism is used for pressing and fixing the inner lining pipe and the outer lining pipe; a sealing groove pressing piece is arranged on the main machine body between the two sets of inner lining pipe displacement mechanisms in a lifting mode so that a sealing groove can be formed in the end face of the outer lining pipe in a pressing mode. One side of the main machine body is provided with a feeding mechanism of a sealing piece and a connecting assembly. The two-way socket and spigot joint pipeline comprises a two-way socket and spigot joint body, a first sealing ring and a connecting assembly and is manufactured in a press fit mode through two-way socket and spigot joint pipeline manufacturing equipment. The two-way socket and spigot joint has the effects that the sealing performance and the installation convenience of the two-way socket and spigot joint pipeline are improved, and meanwhile the installation firmness is guaranteed.

The invention relates to the technical field of assembling tools, and discloses a push rod assembly assembling tool which comprises a tool containing base, a mounting groove is formed in the surface of the tool containing base and used for being clamped into a table, the tool adopts a three-in-one integrated design, a push rod assembly is divided into three parts of assembling procedures, the assembling procedures are completed on the same tool containing base in a centralized mode, and the assembling efficiency is improved. The first assembling part is arranged along the Y axis and can synchronously complete pretreatment assembling of multiple sets of guide rod assemblies, the second assembling part arranged along the X axis is matched with the extrusion assembly to achieve pressing-in operation of a plastic cover, the third assembling part is arranged along the Z axis, assembling of a gear and a cover body assembly in a push rod shell assembly is achieved, the transfer time between procedures is greatly shortened, and the connection cost is greatly reduced. And through integrated layout, precise positioning and convenient operation design, the production efficiency is remarkably improved, the product quality is effectively guaranteed, and the labor and equipment investment cost is reduced.

The utility model discloses a turbofan shell, centrifugal turbofan and breathing machine, wherein the turbofan shell comprises a volute upper cover, a volute lower cover fixedly installed below the volute upper cover, an air flow channel forming circumferential uniform section and an air outlet communicated with the air flow channel, the air outlet is tangent to the air flow channel, and the centrifugal turbofan is arranged in the volute lower cover. An air inlet is formed in the top of the volute upper cover, a filling block which is installed on the volute upper cover and is of a spiral structure is arranged in the airflow channel, the starting end of the filling block is located at a circumferential inlet of the airflow channel, and the tail end of the filling block right faces the air outlet. And the thickness of the filling block is linearly reduced to zero from the starting end along with the increase of the circumferential angle of the airflow channel. According to the utility model, the filling block with the spiral structure is arranged, and the thickness of the filling block is gradually reduced, so that the runner area of the airflow channel is gradually increased along with the increase of the circumferential angle in the circumferential direction, the flow change of airflow is better met, the pneumatic efficiency is improved, and the noise is reduced.

The utility model discloses a lubricating oil interruption test device for a turbofan engine. The lubricating oil interruption test device comprises a lubricating oil tank, a lubricating oil pump, a low-pressure compressor, a high-pressure compressor and an intermediate case positioned between the low-pressure compressor and the high-pressure compressor, the gas supply device is used for supplying gas to the lubricating oil pump during the test and comprises a gas supply pipeline; the oil supply test device comprises a mounting support, a three-way switching valve mounted on the mounting support, a first oil supply pipeline and a second oil supply pipeline, the three-way switching valve comprises a first communication port, a second communication port and a third communication port, the first communication port of the three-way switching valve is connected with an air supply pipeline, and the second communication port of the three-way switching valve is connected with a second oil supply pipeline. The first oil supply pipeline is connected between a second communication port of the three-way switching valve and the lubricating oil tank, the second oil supply pipeline is connected between a third communication port of the three-way switching valve and the lubricating oil pump, and the three-way switching valve is provided with a first valve position communicated with the first communication port and the third communication port and a second valve position communicated with the second communication port and the third communication port. And the mounting bracket is mounted on the intermediate case.

A right port of a valve seat (5) abuts against the outer edge, axially bulging towards the left side, of a valve clack (9), a middle shaft part on the right side of the valve clack (9) rightwards extends out of a first guide rod (12), the right end of the first guide rod (12) is coaxially fixed in a guide sleeve (11) installed on the left side of the middle shaft part in a supporting seat (14), and the middle section of the first guide rod (12) is sleeved with a spring (13). The left end and the right end of the spring (13) abut against the right end face of the valve clack (9) and the outer edge of the left section of the guide sleeve (11) respectively, and the left section of the supporting seat (14) is a conical opening. Due to the unique structural design, resistance and pressure loss are small when fluid passes through, the flow coefficient is large, and the valve is suitable for large-flow medium pipelines. No water hammer impact phenomenon exists, dynamic response is fast, opening and closing are smooth and stable, and the outstanding low-noise and sealing performance is achieved. And sealing surface leakage caused by poor centering performance of the valve clack and uneven stress of a sealing pair due to the gravity factor is avoided.

The present invention provides a clay calcination color control system, which includes a suspension calcination subsystem and a rotary cooling subsystem. The suspension calcination subsystem is used for preheating, calcining, decomposing and separating clay materials, and the rotary cooling subsystem is used for cooling the clay materials after calcination and decomposition; wherein the rotary cooling subsystem includes a rotatable cooler, and the cooler is provided with a first water spraying device at least at the inlet end or outlet end of the material, which is used to spray cooling water, so that the cooling water vaporizes to generate water vapor and fills the inlet or outlet part, isolates the air exchange inside and outside the cooler, and prevents the clay material from being oxidized and discolored during the cooling process, so as to achieve color control of the finished clay. The present invention performs calcination and cooling in different equipment respectively; while improving the stability of the operation of the entire system, improving the heat exchange effect, and simplifying the quality control, the present invention also achieves stable and reliable color control in production.

The invention discloses a stacking manipulator for waterproof material production, which relates to the technical field of stacking equipment, and comprises a base fixed on an industrial manipulator, an outer cylinder body is fixedly connected on the base, a middle cylinder body and an inner cylinder body are sequentially connected in the outer cylinder body in a sliding manner, expansion rings are respectively fixed at the tail ends of the outer cylinder body, and inner expansion cylinders and inner expansion blocks are arranged on the expansion rings; the inner expansion block is pushed by hydraulic pressure or air pressure to move outwards to achieve expansion clamping of the inner wall of the material winding drum, a clamping cylinder body and a clamping piston are arranged on the outer side of the outer cylinder body, the clamping piston drives a clamping rod to move inwards to clamp the outer wall of the material winding drum, and the adjusting device comprises an adjusting pipe, an adjusting sleeve, an adjusting ball and a conical spring. According to the invention, the connection pressure and the clamping force of the clamping mechanism can be adjusted, the requirements of different materials and specifications are met, the inside and the outside of a material reel can be clamped simultaneously, the material is prevented from being scattered or damaged, the device is suitable for material reels with different lengths, and the automation degree and the production efficiency of waterproof material production are improved.

The utility model discloses a carbonized steel slag aggregate preparation device, and relates to the field of building material preparation and carbon capture. The device comprises a carbonization device, a flue gas discharge pipe, a flue gas inlet pipe, a rotary carrier roller, a flue gas distributor, a gas guide pipe, a distributing device and a feeding conveying belt, the feeding conveying belt is installed above one side of the carbonization device, the flue gas inlet pipe is installed below the other side of the carbonization device, the flue gas inlet pipe is communicated with the flue gas distributor, and the rotary carrier roller is communicated with the flue gas distributor. A smoke distributor is arranged in the carbonization device, a rotating carrier roller is arranged below the smoke distributor, a distributing device and a gas guide pipe are arranged in an inner cavity of the carbonization device, the distributing device is located at the discharging position of the feeding conveying belt, the gas guide pipe is located below the distributing device, and a smoke discharging pipe is arranged at the top of the carbonization device. The carbonization device has the beneficial effects that the carbonization device is simple in structure, convenient to operate and easy to realize, the double targets of large-scale absorption of the steel slag and carbon emission reduction are realized, and the prepared mortar steel slag aggregate can meet the requirement of large-scale absorption of the steel slag.

The present invention provides a chemical analyzer provided with a hollow fiber degassing module that can maintain an originally good degassing performance even when used continuously for a long period of time, and that can suppress the reproduction of bacteria and the like. More specifically, the hollow fiber degassing module (20A) has a housing (210) and a hollow fiber membrane (220) disposed in an internal space (S1) of the housing. The housing (210) has: a liquid supply unit (216A) that connects the outside of the housing (210) and the internal space (S2) of the hollow fiber membrane (220), and that supplies constant-temperature water (W1) from the outside of the housing (210) to the internal space (S2) of the hollow fiber membrane (220); a liquid discharge unit (217A) that connects the internal space (S2) of the hollow fiber membrane (220) and the outside of the housing (210) and discharges the degassed constant-temperature water (W2) from the internal space (S2) of the hollow fiber membrane (220) to the outside of the housing (210); and a gas discharge unit (218A) that connects the internal space (S1) of the housing (210) and the outside of the housing (210) and depressurizes the internal space (S1) of the housing (210). The gas discharge part (218A) is provided at the lower end of the housing (210) in the vertical direction.

The invention relates to a pressure valve (10) comprising:-a body (11) having a fluid inlet opening (12) and a fluid outlet opening (13),-a valve member (18) provided with a valve stem (19) mounted so as to be movable relative to the body (11) in an axial direction between a closed position, in which the valve member (18) rests on a valve seat (15), and an open position, in which the valve member (18) rests on the valve seat (15), the valve member (18) moves away from the valve seat (15). More particularly, the pressure valve (10) further comprises at least one fin (41) arranged upstream of the valve member (18) and for generating rotation of the valve member (18) when fluid flows from upstream to downstream from the fluid inlet opening (12) through the body (11) to the fluid discharge opening (13).

The invention discloses an energy storage device and electric equipment. The energy storage device comprises an end cover assembly, the end cover assembly comprises an end cover, lower plastic and an anti-explosion valve, the end cover is provided with an anti-explosion hole, the anti-explosion hole penetrates through the end cover in the thickness direction of the end cover assembly, and the anti-explosion hole is arranged in an offset mode; the lower plastic comprises a lower plastic body, the lower plastic is provided with a vent hole, the vent hole penetrates through the lower plastic body in the thickness direction of the end cover assembly, and the vent hole is arranged in an offset mode; the lower plastic body is stacked on the end cover, and the vent hole and the explosion-proof hole are opposite and communicated. The exhaust speed of the energy storage device can be increased.

The utility model relates to a filter assembly and an air conditioning system, the filter assembly comprises a filter and a plurality of connecting pipes, the plurality of connecting pipes are respectively connected to the filter, and the filter and the connecting pipes are made of stainless steel; and moreover, the connecting pipe is provided with a bent part, the flatness ratio of the connecting pipe at the bent part is A, and A is less than or equal to 15%. According to the filter assembly, the bending strength can be guaranteed, and the material cost is low.

The invention discloses a large-diameter slurry shield machine slurry pipeline pipe replacing device and method. The device comprises a pipe replacing trolley, a telescopic pipe device, a driving device, a rear matched trailer, a first pipeline support, a fixing frame and a new slurry pipe, and the pipe replacing trolley is connected with the rear matched trailer and can move back and forth in the length direction of the rear matched trailer; the telescopic pipe device is arranged on the rear matched trailer and supported by the first pipeline support, one end of the telescopic pipe device is connected with the pipe replacing trolley, and the other end of the telescopic pipe device is connected with the fixing frame. The driving device is arranged at the lower part of the pipe replacing trolley; during tunneling, the rear matched trailer drives the pipe replacing trolley to move forwards, the telescopic pipe device stretches out, the pipe replacing trolley moves backwards relative to the rear matched trailer, and when the pipe replacing trolley moves to the tail of the rear section trailer and reaches a pipe replacing distance, tunneling and slurry conveying are stopped, the pipe replacing trolley moves to the initial state, the telescopic pipe device retracts, and a new slurry pipe is replaced. Bend-free connection is achieved, and the pressure loss of a pipeline is small; the structure is simple and operation is convenient.

According to the active thermal protection and thermal power generation integrated system based on the supercritical Brayton cycle, the two active cooling modes of convection cooling and sweating cooling are combined, and the energy utilization rate is increased; according to the gradient cooling structure of the nose cone front edge of the high-speed aircraft, the nose cone front edge is divided into a top end section, a middle section and a low end section, heat flows of the three sections are sequentially decreased, and porous metal matrix layers are arranged on the three sections of the nose cone front edge in a gradient mode according to the porosity; a two-stage regenerative-shunt recompression closed Brayton cycle power configuration obtained through calculation and optimization is adopted, and the characteristics of high energy recovery efficiency and compact system structure of the closed Brayton cycle are achieved; and a wing rib array is arranged in the heat exchange channel, so that a larger heat exchange surface area is provided.

The present invention discloses a large flow sliding valve device, a hydraulic pile driving system and a pile driving machine, and relates to the field of hydraulic technology. The large flow sliding valve device includes a main valve body, a main valve core, a first end cover and a second end cover, and the main valve body is provided with a mounting hole for installing the main valve core; the main valve body is provided with a first channel, a second channel, a third channel, a fourth channel and a return oil channel connected to the return oil tank, the first channel and the second channel are used to communicate with the upper chamber of the oil cylinder, and the third channel and the fourth channel are used to communicate with the lower chamber of the oil cylinder; the main valve core is movable between a first position and a second position along the axial direction; the main valve core is provided with a central channel. The large flow sliding valve device provided by the present invention, when lifting the hammer, the hydraulic oil flows from the first channel and the second channel in sequence through the central channel return oil channel and flows back to the return oil tank, and the oil returns quickly; when dropping the hammer, the differential connection flow is large, the pressure loss is small, the pressure difference between the upper and lower chambers is small, the hammer drops faster, and the hammer strikes more forcefully.

The utility model discloses a screen cylinder filter for paint mist collection, which comprises a filter body, a filtering mechanism and a collecting mechanism, support frames are welded on two sides of the bottom end of the filter body, and a discharge valve is arranged at the bottom end of the filter body. According to the screen cylinder filter for paint mist collection, through the arrangement of the filtering mechanism, when paint mist is collected, a filtering cylinder can be conveniently disassembled and assembled through a fixing rod in the filtering mechanism, the filtering cylinder can be conveniently disassembled and cleaned regularly, meanwhile, paint mist filtering cotton made of a paint mist felt is attached to the interior of the filtering cylinder, and the paint mist filtering cotton can be used for filtering paint mist. The paint mist felt can filter impurities in paint mist, the paint mist felt is composed of high-strength continuous monofilament glass fibers, is of an incremental structure, is high in capture rate, good in paint mist isolation effect and good in compression performance and can keep the appearance unchanged, and the filter fibers of the paint mist felt are beneficial to storage of paint mist dust, have elasticity and low pressure loss and have good paint mist capture efficiency.

The invention relates to the technical field of stone cutting, and provides a temperature control system and method of a wire roller bearing for a stone wire cutting device. Cooled lubricating oil output by an oil cooler continuously flows into a bearing cavity to take away heat generated by high-speed rotation of the bearing, so that the temperature of each part in the bearing cavity reaches a preset balance value; the oil temperature of each bearing is controlled in a relatively consistent range while lubrication is provided for the bearing, and the pipe diameter of the oil pipe is correspondingly designed according to the oil path distance between the bearing and the oil inlet and distribution block, so that the consistency of the oil lubrication pressure of the bearing at different distances is ensured, the pressure loss is reduced, the cooling effect of the bearing is improved, and the service life of the bearing is prolonged. And therefore, stable operation of the bearing is guaranteed, the problems of cutting gap enlargement and wire breakage caused by skewness and bounce enlargement are avoided, and the stone wire cutting precision can be improved.

The utility model relates to the technical field of heat exchangers, and discloses a U-shaped heat exchange tube type multi-tube-pass anti-corrosion heat exchanger which comprises a shell, one end of the shell is fixedly connected with a first fixing ring, a tube box is installed on one side of the shell, one end of the tube box is fixedly connected with a second fixing ring, a tube plate is installed on one side of the first fixing ring, and the tube plate is installed on one side of the second fixing ring. And a plurality of bolts are mounted in the first fixing ring. According to the utility model, the nuts are separated from the bolts by rotating the nuts, the tube box is detached from the shell, the whole U-shaped tube bundle is detached by pulling the tube plate, the fixing rings are separated from the mounting holes by pulling the single tube pass, and the U-shaped tube bundle is in interference fit with the rubber rings through the U-shaped tube bundle and the fixing rings. The single tube pass can be quickly disassembled and assembled, replacement and maintenance are facilitated, the maintenance cost is effectively reduced, the cleaning effect is better, dirt and corrosives are effectively prevented from being accumulated, and the service life of the tube pass can be prolonged.

The utility model relates to the technical field of ultrahigh-pressure hydraulic equipment, and mainly discloses an ultrahigh-pressure hydraulic pressure cylinder which comprises a cylinder barrel, a front end cover, a rear end cover, a piston, a piston rod and a high-pressure cylinder, the front end and the rear end of the cylinder barrel are connected with the front end cover and the rear end cover respectively, a displacement sensor is installed on the rear end cover, and the front end cover is connected with the high-pressure cylinder in a sealed mode. An oil inlet is formed in the rear end cover, an oil return opening is formed in the front end cover, the piston is connected into the cylinder barrel in a sealed and sliding mode, one end of the piston rod is fixedly connected with the piston, the other end of the piston rod penetrates through the front end cover to be connected into the high-pressure cylinder in a sliding mode, and a liquid inlet and a liquid outlet are formed in the high-pressure cylinder. The selection of materials of sealing pieces in the high-pressure cylinder and the cylinder barrel and the design of a sealing structure are suitable for the ultrahigh-pressure pressurizing cylinder, the sealing effect is good, and the corrosion phenomenon is not prone to occurring. The front end cover, the rear end cover and the high-pressure cylinder are designed in a split mode, disassembly is convenient, and maintenance is convenient. The displacement sensor enables the pressure cylinder to be high in control precision and good in responsiveness.