137 results about "Tubing types" patented technology

The invention discloses an integrated shell and tube type marine heat exchange device, and belongs to the technical field of marine heat exchange.The integrated shell and tube type marine heat exchange device is provided with jacking springs, a top plate, movable clamping blocks, reset springs, baffle plates and heat transfer tubes, after the multiple heat transfer tubes are all pulled away, the top plate is pushed to be tightly attached to a mounting base, and the top plate extrudes the jacking springs to deform in mounting through grooves; meanwhile, a fixed clamping hook is pushed to be clamped in a movable clamping groove to slide, a movable clamping block is driven to move to a clamping opening of the movable clamping groove, after a top plate is tightly attached to a mounting base, the fixed clamping hook is loosened, the movable clamping block is jacked up under the springback effect of a reset spring, and the movable clamping block and the movable clamping groove are connected in a clamped mode; and then the heat transfer pipe is inserted into the through holes of the mounting seat, the mounting end cover and the baffle plate, so that the jacking end ring is tightly attached to the top plate, the elastic clamping ring is inserted into the through hole of the mounting seat to extrude the elastic clamping ring to deform, and therefore, the heat transfer pipe is clamped and fixed in the through hole of the mounting seat, and the heat transfer pipe can be conveniently jacked out, pulled out or inserted and mounted.

The utility model discloses a finned tube type heat exchanger for a hot galvanizing line, which comprises a shell, a smoke inlet and a smoke outlet are respectively arranged at two ends of the shell, and a plurality of air ducts arranged side by side are arranged between the smoke inlet and the smoke outlet. A plurality of fin heat exchange tube sets are arranged in the air flue at intervals in the smoke flowing direction, each fin heat exchange tube set is provided with a cold side inlet and a cold side outlet, all heat exchange tubes of the fin heat exchange tube sets are fixed to an upper tube plate and a lower tube plate, the heat exchange tubes are connected through U-shaped elbows, and the fin heat exchange tube sets share the upper tube plate and the lower tube plate. A plurality of fin heat exchange tube groups are inserted into the air duct from top to bottom; the upper tube plate is connected with an equipment flange on the shell through a gasket and a fastener; an expansion joint and an electric air valve are sequentially arranged at the air duct inlet in the smoke flowing direction, and the opening degree of the electric air valve is determined according to the smoke outlet temperature. The heat exchanger is convenient for ash removal, overhaul and maintenance, and solves the problem that the performance of the heat exchanger is reduced due to smoke side dust blockage.

The invention discloses a composite working medium condensation and separation device for a semi-closed S-CO2 power cycle system, relates to the technical field of composite working medium condensation and separation, and solves the problem of separation of gaseous water in a CO2 working medium. The device comprises a composite working medium inlet drain pipe box, a circulating water shell and a working medium outlet pipe box which are vertically arranged and sequentially connected, wherein a spiral heat exchange pipe bundle is arranged in the circulating water shell; the composite working medium inlet drain pipe box, the spiral heat exchange pipe bundle and the working medium outlet pipe box are sequentially communicated; the composite working medium inlet drain pipe box is provided with a composite working medium inlet connecting pipe and a drain outlet connecting pipe; a water supply inlet connecting pipe and a water supply outlet connecting pipe are arranged on the circulating water shell; a working medium outlet connecting pipe and a starting exhaust port connecting pipe are arranged on the working medium outlet pipe box, and a wire mesh demister is arranged in the working medium outlet pipe box. According to the invention, through the coiled tube type heat exchanger, circulating water is adopted as a cold source to cool and condense the composite working medium, and based on the condensation temperature difference of CO2 and H2O, efficient separation of two components of CO2 and H2O is completed.

The application relates to the field of laser cladding technology and discloses a long tube part inner and outer laser cladding equipment, which comprises a base, an outer cladding mechanism and an inner cladding mechanism, one end of the base is provided with a detachable main shaft, the outer cladding mechanism is located on one side of the base and is in sliding fit with the base, the upper end of the base is provided with a slidable bracket, a pipe clamping mechanism, a follow-up supporting mechanism and the inner cladding mechanism, the bracket supports the part, the pipe clamping mechanism is sleeved on the outer side of the part to clamp and drive the part to rotate, the inner cladding mechanism comprises an inner cladding head, the follow-up supporting mechanism is close to the end of the part and adjusts the height along with the jumping of the part, and the follow-up supporting mechanism supports when the inner cladding head processes the end of the part; the application solves the problem that the existing technology adopts end driving and is prone to causing large radial jumping amplitude of the pipe, thereby improving the stability of the part, improving the processing efficiency and the cladding quality.

The invention discloses a water pipe type two-return-stroke energy-saving and emission-reducing superheater assembly of a traditional boiler, and relates to the superheater assembly researched and developed according to the wide-capacity radiation heat exchange concept of a boiler hearth and the physical phenomenon outside the field (see the specification in details) capable of generating extremely few nitrogen oxides, and a traditional boiler body with the modified hearth. After the flange pipelines are connected and combined, the technical advantages brought by obvious technical characteristics are derived: the heat efficiency is improved by about 6-8%, the steel consumption is reduced by about 20%, and the cost is reduced by 30% due to the application of the boiler hearth tolerance radiation heat exchange concept; forced circulation medium water is in a water pipe of the two-return-stroke energy-saving emission-reducing superheater assembly, the heat exchange second flow speed is increased to about 1.5 m, the technical characteristic completely meets the requirement of physical phenomena outside the field capable of generating extremely few nitric oxides, and the purpose of ultralow nitrogen emission of the nitric oxides smaller than or equal to 15 / 25 milligrams is achieved; meanwhile, other technical problems of the product in the background technology are solved.

The utility model relates to a large-flow energy-saving coil pipe type heat exchanger which comprises an energy-saving heat exchange assembly, a matching auxiliary assembly is arranged at the inner end of the energy-saving heat exchange assembly, a water stirring and flow mixing assembly is arranged in the matching auxiliary assembly, and the problems that the inner wall of an existing pipe lacks an effective enhanced heat exchange structure, the flowing state of fluid in the pipe is single, the turbulence degree is low, and the heat exchange efficiency is high are solved. In order to solve the problem that the overall heat exchange efficiency is difficult to improve due to the fact that heat exchange mainly depends on natural convection, a water stirring and flow mixing assembly is arranged, when fluid flows in an inner coil pipe, a motor is started to be matched with a vertical electric guide rail, and a plurality of multi-dimensional rotating blades connected with a displacement shaft piece can vertically move up and down in the axial direction of a vertical rod; the elastic accessory is connected with the shakable hollow-out ball, the metal outer layer drives the shakable hollow-out ball to move correspondingly under the action of the magnetic field of the strong magnetic end block, and the elastic accessory plays a role in buffering impact force and guaranteeing flexible movement of the shakable hollow-out ball.

The application relates to the technical field of heat exchange, and discloses a column-tube type heat exchanger for fluid heat exchange, which comprises a shell, the inside of the shell is uniformly distributed with inner mounting plates, the outside of the inner mounting plates is rotationally connected with outer mounting plates, the inside of the shell is provided with two inner end plates, the outside of the inner end plates is rotationally connected with outer end plates, the outside of one side of the outer end plates is fixedly connected with a ratchet wheel, the inside of the other side of the outer end plates is rotationally connected with a fixing frame, the upper end of a driving bin two is slidably connected with a sliding shaft, and the upper end of the sliding shaft is fixedly connected with a limiting block. Through the relative rotation of the outer mounting plates and the inner mounting plates, the window area and the flow position of the clear water flow channel formed between the outer mounting plates and the inner mounting plates continuously and dynamically change, the clear water in the shell is forced to continuously change the flow direction, the clear water is prevented from long-term flowing through the local heat exchange area along the fixed flow channel, the outer surfaces of all the heat exchange tubes can be fully contacted with the low-temperature clear water, and balanced and deep heat exchange of the whole tube area is realized.

The utility model provides a tubular conveyer belt anti-deviation device which comprises a first roller, a second roller, a third roller, a fourth roller, a fifth roller and a sixth roller which are arranged on the same plane in an s shape, the first roller, the third roller and the sixth roller are arranged in parallel, the second roller is vertically arranged between the first roller and the third roller, and the fourth roller is arranged between the fifth roller and the sixth roller. And the fourth roller and the fifth roller are sequentially arranged between the third roller and the sixth roller. According to the deviation preventing device for the tubular conveying belt, due to the fact that the deviation preventing device is arranged on the upper carrier roller of the carrier roller frame of the circular tube type conveyor rack, the edge portion of the tubular conveying belt can be limited, when the tubular conveying belt deflects, the second roller and the fifth roller can prevent the edge portion from continuing to twist, and therefore deviation of the tubular conveying belt is prevented. And the problems of pipe twisting, material spilling, belt tearing and belt stacking caused by deviation are avoided.

The utility model discloses a fire detection tube type temperature-sensing self-starting fire extinguishing device which comprises a tube body, sleeves used for shrinking towards the axial lead direction are arranged on the outer walls of the two ends of the tube body in a sleeved mode, sealing valve bodies are arranged at the two ends of the tube body, and the sleeves are tightly pressed on the end faces of the tube body. A plurality of convex hulls at equal intervals are evenly distributed on the inner wall of the sleeve with a circle point as the axis and abut against the outer wall of the pipe body, a protective cover is arranged on the outer wall of the sealing valve body, and the sealing valve body is further provided with detachable installation pieces embedded into the two sides of the protective cover. A plurality of convex hulls are embedded in the inner wall of the pipe body, so that the friction force and the locking force between the sleeve and the pipe body are effectively enhanced, the connection looseness caused by factors such as oxidation and humidity is prevented, and the fire extinguishing agent is effectively prevented from leaking; through the design of the detachable mounting piece, screw fixing or magnetic attraction mounting is supported, and practicability and convenience are achieved; in addition, the protective cover also plays a role in increasing the creepage distance and preventing fire.

The invention relates to the technical field of steam generator furnace bodies, and discloses a super-efficient water pipe and fire pipe fused steam generator furnace body which comprises a cabinet and further comprises a plurality of heat exchangers, the heat exchangers are linearly and evenly distributed in the cabinet, and each heat exchanger is composed of a first exchanger piece, a second exchanger piece and a heat exchange shell; the first exchanger piece and the second exchanger piece are located in the heat exchange shell, and the heat exchange shell is used for bearing the first exchanger piece and the second exchanger piece. And a first exchanger sheet. According to the invention, an outer fin round tube type and a tube without fins used in most boilers in the market are improved into a flat plate type, fins are arranged on two surfaces, the heat exchange area is larger under the condition of the same water volume, and the boiler is more energy-saving, so that the use effect of the boiler body is improved.

The application discloses a plate-tube type freezing evaporator in the technical field of refrigeration equipment, which comprises an evaporation plate and an evaporation pipe, the evaporation pipe is fixed on the evaporation plate, both ports of the evaporation pipe are located on the same side of the evaporation plate, a plurality of punching ports are arranged on the evaporation plate, the punching ports are oppositely arranged in pairs, a first folding edge is arranged at the opposite end of the opposite punching ports, the evaporation pipe is arranged on the inner side region opposite to the first folding edge, and the evaporation pipe can be arranged in a single-pipe independent fixing mode or a double-pipe parallel fixing mode in the inner side region, a second folding edge and a third folding edge are sequentially connected to the two sides of the evaporation plate, notches are arranged at the upper and lower ends of the second folding edge, and the two ports of the evaporation pipe penetrate the notches.

The utility model discloses a finned tube type electric heating steam generator which comprises a shell, a fuel gas heating cavity is formed in the shell, and a fuel gas burner is fixedly installed on the inner wall face of the fuel gas heating cavity. According to the gas stove, the spiral pipe disc and the gas burner are installed in the gas heating cavity, flames generated by working of the gas burner are promoted to directly burn and heat the spiral pipe disc, and the heat exchange area is increased through the heat conduction fins on the surface of the spiral pipe disc; according to the gas heating and electric heating device, gas heating and electric heating are combined, the steam generation efficiency is improved, a detachable sealing plate is arranged on the surface of a shell corresponding to a gas heating cavity, and an upper connecting sleeve and a lower connecting sleeve are in threaded connection with the joint of a steam eduction pipe, a water guide pipe and a spiral pipe disc, so that the steam eduction pipe, the water guide pipe and the spiral pipe disc are in threaded connection; and the upper connecting sleeve and the lower connecting sleeve are respectively provided with a limiting ring, a threaded cover, a threaded nozzle and a sealing ring, so that the spiral pipe disc can be conveniently and quickly assembled and disassembled.

The application discloses a kind of roll type reverse osmosis membrane and the compatible installation structure of disc tube type reverse osmosis membrane shell, including including membrane shell, upper pressure flange, lower pressure flange and center pull rod, and upper support sleeve, lower support sleeve, several membrane elements and center water production pipe being set in membrane shell 1 inside, the socket and flow channel in the inside of upper and lower support sleeve are used to connect the membrane element, under the premise of not reforming original DTRO membrane shell, sealing accessory, cleverly utilize the center pull rod compression structure of membrane shell itself, realize the tension sealing of roll type reverse osmosis membrane element and support sleeve, center water production pipe, solve the problem that two incompatible membrane elements cannot be used universally, avoid equipment idle, especially suitable for low concentration wastewater treatment or pilot experiment and other high cost-effective application scenarios.

The invention provides a shell and tube type condenser (100, 200) for transfer-ring energy from a refrigerant fluid to a service fluid comprising -an essentially cylindrical shell (110, 210) comprising an inlet (111, 211) for refrigerant fluid in a super-heated vapor state on an upper side and an outlet (112, 212) for completely condensed, slightly subcooled refrigerant fluid on a lower side; - a plurality of tubes (121, 122, 221, 222) for the service fluid, said tubes (121,122, 221, 222) passing through the essentially cylindrical shell (100, 200) extending essentially parallel to the cylinder axis of the essentially cylindrical shell (100,200), said tubes (121, 122, 221, 222) being connected to each other in such a way that service liquid flowing through said tubes (121,122, 221, 222) is led N times inside the tubes (121,122, 221, 222) through the essentially cylindrical shell (100, 200), wherein N is a natural number and N>1; - a number of M longitudinal metal sheets (150, 250) extending from an end of the essentially cylindrical shell (110, 210) and defining in the essentially cylindrical20 shell (110, 210) M+1 passageways (113,114, 213, 214) so that refrigerant fluid makes M+1 passes along tubes (121,122, 221, 222) for the service fluid, wherein M is a positive natural number; wherein the area of the respective cross sections (A1, A2) of the M+1 passageways (113,114, 213, 214) in the direction orthogonal to the cylinder axis of the essentially cylindrical shell (110, 210) decreases from the topmost passageway (113, 213) to the lowest passageway (114, 214).

The invention relates to the technical field of air coolers, in particular to a three-dimensional ribbed tube type air cooler which comprises a plurality of sets of bottom frames, a protective net is arranged between every two adjacent sets of bottom frames, a fixing frame is fixedly connected between every two adjacent sets of bottom frames, the protective nets are fixedly installed on the fixing frames, and the upper ends of the multiple sets of bottom frames are jointly and fixedly connected with a tube box. A sewage pool is jointly arranged at the lower ends of the multiple sets of underframes, a guardrail is arranged on the outer side of the pipe box, a baffling water chamber is arranged on the inner side of the pipe box, two sets of fans are arranged at the upper end of the pipe box, and a cleaning assembly used for cleaning the protective net is arranged on the outer side of the protective net. According to the sewage treatment device disclosed by the invention, condensed water can be sprayed onto the protective net through the spray heads to clean the protective net, so that impurities isolated by the protective net slide down from the protective net.

According to the low-price coal pyrolyzing furnace, a venturi tube type guide cylinder internal circulation structure is adopted, the furnace temperature ranges from 550 DEG C to 600 DEG C, the pressure is 0.3 MPa, a furnace body is made of S31008 stainless steel, the heat-resistant temperature is 800 DEG C, a lining refractory material is not used, and a volute nozzle is made of silicon carbide which can resist the temperature of 2000 DEG C. The pyrolyzing furnace mainly comprises two groups of cyclone dust collectors (1) which are connected in series, a pyrolyzing furnace body (2), a dust collecting pipe (3), an internal venturi tube type guide cylinder (4), a discharge pipe (5), a volute nozzle (6), a gas-solid conveyor (7) and a bubble cap distribution plate (8). Compressed air and pulverized coal enter from the side portion, exit from the lower portion of the slag discharge port, coal gas enters from the bottom, pyrolysis gas exits from the upper portion, and a plurality of soot blowing ports are formed in the middle of the furnace. The proportional relation between the size of each part and the diameter of the furnace body is also introduced, so that an innovative structure of the low-price coal pyrolyzing furnace is formed.

The utility model discloses an easy-to-clean inclined tube type sedimentation tank which comprises a sedimentation tank body, a plurality of inclined tube units are arranged in the sedimentation tank body, a movable inner tube is connected in each inclined tube unit in a sliding mode, and the movable inner tubes can move in the inclined tube units in the axial direction. The movable inner pipe can be pulled out of the inclined pipe unit in the axial direction, and the outer wall of the movable inner pipe is attached to the inner wall of the inclined pipe unit. The movable inner pipe is connected into the inclined pipe unit, the movable inner pipe and the inclined pipe unit are each of a pipe structure, the sedimentation tank can conduct sedimentation work through the inclined pipe unit and can also conduct sedimentation work through the movable inner pipe, the movable inner pipe can be pulled out relative to the inclined pipe unit, and therefore in the using process, the movable inner pipe can be pulled out relative to the inclined pipe unit; the cleaning efficiency of the interior of the inclined pipe can be improved, cleaning is convenient, the cleaning time is saved, and the production efficiency cannot be greatly interfered.

The utility model discloses a single-sided dotted tubular vapor chamber, which comprises a first tube body and a second tube body, the first tube body and the second tube body are connected into a whole to form a hollow tube, the outer side surface of the first tube body is provided with a plurality of dotting grooves, and the dotting grooves are formed by recessing from the outer side surface of the first tube body to the inner side. The bottom of the dotting groove is fixedly connected with the inner side face of the second pipe body, the two ends of the first pipe body are bent inwards in an inclined mode to form first bent parts, the two ends of the second pipe body are bent inwards to form second bent parts, and the first bent parts and the second bent parts are connected in a sealed mode. The dotting grooves are formed in the upper surface through rolling, the rolled dotting grooves are in contact connection with the inner side of the bottom of the uniform-temperature plate, the whole pipe body is supported through the dotting grooves, the installation and use strength of the pipe body is improved, the situation that the heat dissipation effect is affected due to deformation of the pipe body is avoided, overall heat conduction is uniform, and the service life of the pipe body is prolonged. And the heat dissipation efficiency of the vapor chamber can be conveniently controlled.

The utility model discloses a high-temperature gas-phase U-shaped tubular condenser which comprises a tube box, a heat exchanger and a heat exchanger, the tube plate is connected with the tube box; the barrel is provided with a hot oil gas inlet, the hot oil gas inlet is communicated with the interior of the barrel, the axis of the hot oil gas inlet is tangent to the inner wall of the barrel, and the barrel is connected with the tube plate; and the U-shaped tube bundle is arranged in the cylinder body. Through the application of the high-temperature gas-phase U-shaped tubular condenser, an enough thermal expansion space can be provided through the U-shaped tube bundle, so that thermal stress caused by temperature change is effectively relieved, safe and stable operation of the condenser can be ensured under the condition that the temperature difference of heat exchange media is large, and the service life of the condenser is prolonged. The risk that a traditional tube type heat exchanger is prone to sealing-off leakage is avoided; in addition, by means of the unique tangential hot oil gas inlet and the guide plate, the hot oil gas can be in a rotary flowing state in the barrel, the retention time of the hot oil gas in the condenser can be prolonged, and the heat exchange efficiency is improved.

The invention relates to the technical field of waste heat recovery, and discloses a twisted honeycomb tube type waste heat recoverer which comprises a bearing mechanism, a shell, a recovery box fixedly installed in an inner cavity of the shell and a connecting assembly arranged at the top of the recovery box. And the heat exchange mechanism comprises a conveying pipeline fixedly mounted on the outer side of the recovery box body. The heat inlet assembly adopts the twisted structure design of a multi-layer honeycomb tube, the heat transfer boundary layer is obviously thinned by increasing the fluid turbulence degree, the heat exchange efficiency is improved, a spiral tube structure in the anti-blocking assembly generates centrifugal force to separate dust, and the protection design of a shell sleeve is matched, so that dust accumulation is effectively prevented, and the formation of a heat resistance layer is reduced; due to the high-density arrangement of the honeycomb pipes, the heat exchange area of unit volume is greatly increased, the overall structure is more compact, the defect that traditional equipment is large in size is completely overcome, and the heat exchange efficiency, the anti-blocking performance, the space utilization rate and the like of the waste heat recoverer are remarkably improved.

The utility model relates to a single-pipe type external window water spraying test device, and belongs to the field of building performance detection, the single-pipe type external window water spraying test device comprises a hoisting mechanism, an installation body and a spraying assembly, the hoisting mechanism is used for suspending the installation body, the spraying assembly comprises a spraying pipe head, the spraying pipe head is fixedly installed on the installation body, the hoisting mechanism comprises a winch and a hoisting rope, and the hoisting rope is fixedly installed on the installation body. The number of the winches and the number of the lifting ropes are both two, one end of each lifting rope is connected with one winch, the other end of each lifting rope is connected with the installation body, and indicating scales are arranged on the lifting ropes. By actively adjusting the two lifting ropes, the attitude levelness of the mounting body is improved.

The application discloses a super-large triad central tube type rotating bed gasification furnace, which comprises a hearth with a gasification section and a dry distillation section, and the wall part of the hearth is provided with an annular channel extending in the circumferential direction; a triad central tube assembly is arranged at a relatively upper position in the dry distillation section and comprises three array tubes arranged in a circumferential array with the hearth central axis as a reference and a flow collecting mechanism connected to the top of the three array tubes. The triad central tube realizes multi-point uniform gas collection and primary separation, the triad structure guarantees uniform radial heating of the dry distillation section, reduces tar generation from the source, and then the gap and the annular channel are used to realize forced backflow of heavy tar, uncompletely combusted fine carbon particles and fly ash to the gasification section combustion chamber for secondary cracking, thereby reducing the tar content of the outlet coal gas, the array tube dispersion reduces the inlet flow rate, effectively reduces the fly ash entrainment in the coal gas, the uniform gas extraction point optimizes the bed layer gasification agent distribution, and the carbon conversion rate is effectively improved.

The utility model discloses a coiled tube type heat exchanger, which relates to the related field of heat exchangers, and comprises a barrel and a coiled tube, and the coiled tube is positioned in the barrel; an upper seal head is arranged at the top end of the barrel, a lower seal head is arranged at the bottom end of the barrel, the upper seal head is provided with a tube pass inlet and a shell pass inlet, the shell pass inlet is formed in the upper end of the upper seal head, the tube pass inlet is formed in the side face of the upper seal head, the lower seal head is provided with a tube pass outlet and a shell pass outlet, and the shell pass outlet is formed in the lower end of the lower seal head. A tube pass outlet is formed in the side surface of the lower sealing head; an upper tube plate is arranged between the cylinder and the upper sealing head, a lower tube plate is arranged between the cylinder and the lower sealing head, the winding tube is connected with the upper tube plate and the lower tube plate, the winding tube is arranged between the upper tube plate and the lower tube plate, the upper tube plate and the lower tube plate are both provided with center holes, the center hole of the upper tube plate is connected with a shell pass inlet through a shell pass connecting tube, and the center hole of the lower tube plate is connected with a shell pass outlet through a shell pass connecting tube. The center hole of the lower tube plate is connected with the shell pass outlet through the shell pass connecting tube, the heat exchange area is increased, and the heat exchange effect is good.

The invention discloses an automatic tube penetrating device for a tube type heat exchanger, and relates to the technical field of automatic tube penetrating, the automatic tube penetrating device for the tube type heat exchanger comprises a rack body, and a rectangular frame is fixed at the top of the rack body; a belt conveying assembly is installed in the rectangular frame, and sliding rails are fixed to the two sides of the top of the rectangular frame. A plurality of tube plate fixing assemblies are installed on the sliding rails in a matched mode. The lower end of each tube plate fixing assembly is riveted and fixed with a belt on the belt transmission assembly; according to the pipe penetrating device, after the pipe plates are placed on the pipe plate fixing assemblies corresponding to the conveying frame, the belt conveying assembly drives the multiple pipe plate fixing assemblies to slide along the sliding rails at the same time, the pipe plate fixing assemblies without the pipe plates are placed on one side of the conveying frame, and after the pipe plates are fixed to all the pipe plate fixing assemblies, pipe penetrating operation is conducted; in this way, one pipe can penetrate through a plurality of pipe plates at the same time, and therefore the assembling efficiency of the heat exchanger is improved.

The invention relates to the technical field of offshore complex soft foundation land filling construction, in particular to a method for constructing a composite foundation through balanced type silt extrusion gravel piles. Comprising the steps of construction preparation and investigation; an immersed tube type mud drawing-out well is formed; an immersed tube with a tube tip is arranged at the pile position in a driving mode, and silt extrusion is conducted; taking out the immersed tube tip; filling in sections, and ramming and expanding the pile body; circularly constructing the pile body, discharging mud and reducing pressure; and detecting the compactness and the bearing capacity of the pile body. Sludge is discharged through the pressure reduction mud drawing well, the overall gravel replacement rate of a sludge layer is increased, the soil pressure is balanced, the situation of ground upheaval caused by silt extrusion in the pipe sinking process is avoided, and the problem of differential settlement of a foundation is further solved; the overall construction period is shortened by about 40% through a rapid hole guiding mode, the gravel replacement rate is increased by about 50%, and the overall effect of foundation treatment is guaranteed.

This utility model relates to the field of atomizing discs and discloses a ceramic tube-type spray-welded composite atomizing disc, including a lower atomizing disc, an upper atomizing disc on the upper surface of the lower atomizing disc, an mounting assembly on the lower surface of the upper atomizing disc, a flow-guiding and wear-resistant assembly on the inner surface of the lower atomizing disc, and a conical sleeve fixedly connected to the inner wall at the bottom of the lower atomizing disc, the upper surface of the conical sleeve having a connecting hole; the flow-guiding and wear-resistant assembly includes a wear-resistant disc, which is disposed on the inner wall at the bottom of the lower atomizing disc. In this utility model, by installing the wear-resistant disc and spraying an alloy composite layer on the surfaces of the wear-resistant disc and multiple components of the atomizing disc, the alloy composite layer and the ceramic tube have a hardness greater than HRC60. During operation, it can resist the high-speed impact of calcium carbonate particles in lime slurry, reducing wear. Compared with traditional atomizing discs, it significantly extends service life, reduces replacement frequency, and saves maintenance costs.

The utility model discloses a precooling ice box adaptive to various pipe types, which comprises a box body, a plurality of pipe holes are arranged on at least three surfaces of the box body, and a plurality of anti-skidding blocks are further arranged on the box body. The limiting rings are correspondingly arranged on the sides, close to the center of the box body, of the pipe holes, and the diameters of the limiting rings are gradually increased in the direction close to the center of the box body. The space pre-cooling ice box is high in utilization rate, can prevent the box body of the pre-cooling ice box from shifting or tube bodies in the box from sliding out due to accidental collision or slight vibration, and can meet the pre-cooling requirements of the tube bodies of multiple specifications.

1. The name of the design product: metal stretch profile pipe type (250103-02A). 2. The use of the design product: the design is used on electric towel rail or warmer. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view. 5. Other circumstances that need to be explained: the product is not limited in length.

The utility model discloses a vortex tube type bearing assembling and disassembling auxiliary device which structurally comprises a tool box and a vortex tube movably connected with the tool box, the air inlet end of the vortex tube is connected with external compressed air, the cold air end of the vortex tube is connected with an annular air knife, and the hot air end of the vortex tube is connected with a hot air end quick connecting tube. A tail end pipe opening of the hot air end quick connecting pipe is a closed end, a bearing inner ring spacer bush is assembled on the hot air end quick connecting pipe, and a vent hole communicated with an inner cavity of the hot air end quick connecting pipe is formed in the bearing inner ring spacer bush. After the technical scheme is adopted, the vortex tube type bearing assembling and disassembling auxiliary device provided by the utility model is connected with compressed air of an air chamber on site, and the compressed air is converted into cold and hot air flows through the vortex tube so as to heat and cool parts, so that the assembling interference magnitude between a bearing and a shaft is reduced, and the bearing is disassembled or replaced and installed; the device is safe and convenient, improves the maintenance efficiency, and facilitates the protection of spare parts.