88 results about "Porous pipe" patented technology

The invention relates to the technical field of cone valve multi-mode air supply-energy dissipation cooperative cavitation reduction devices and control methods, and discloses a fluid control device named'cone valve multi-mode air supply-energy dissipation cooperative cavitation reduction devices and control methods'. The conical valve aims to solve the problems that an existing conical valve is serious in cavitation under the working condition of high pressure difference, air supply and energy dissipation functions are separated, and response lags. The device is characterized by comprising three stages of energy dissipation perforated pipes which are arranged at the outlet end of a valve body in a gradient mode, negative pressure injection air supply pipes which are symmetrically arranged outside a flow guide cover and flow guide fins which are welded to the inner wall of a cone, and the three stages of energy dissipation perforated pipes, the negative pressure injection air supply pipes and the flow guide fins cooperate to achieve pressure gradient pressure relief, self-adaptive air supply and flow state stability; the control method dynamically adjusts the air supply intensity based on the opening degree, the pressure difference and the vibration signal. According to the technical scheme, cavitation inception and collapse impact are remarkably restrained, vibration noise is reduced, the service life of the valve is prolonged, an external air source is not needed, the system pressure drop is controllable, and the system is suitable for ultrahigh pressure difference and large-flow hydroelectric working conditions.

The invention relates to the technical field of hollow fiber membranes, and discloses a preparation method of a dynamic MBR (membrane bioreactor) hollow fiber membrane component, which comprises the following steps: hollowly connecting an impeller framework with a rim pipe by using a connector to obtain an impeller type membrane component; a plurality of hollow fibers are cast into hollow fiber bundles, one ends of the hollow fiber bundles are cast on the reserved opening of the porous pipe sleeve of the impeller framework, the other ends of the hollow fiber bundles are bundled and cast on the hollow rim, and a blade type hollow fiber membrane assembly is prepared; connecting a hollow rim of the blade type hollow fiber membrane module with a rim pipe of the impeller type membrane module to obtain a dynamic MBR hollow fiber membrane assembly; arranging a plurality of dynamic MBR hollow fiber membrane assemblies on a water guide pipe, and connecting in series to form a wheel row; and arranging a plurality of wheel rows in a staggered manner to complete the preparation of the dynamic MBR hollow fiber membrane module. The invention can solve the problems of low packing density of the existing rotary membrane component and easy blockage and pollution of the root of the existing curtain type membrane component, and greatly prolongs the service life of the membrane.

The invention relates to a sorption module for CO2 sorption, comprising: - a porous and tubular sorbent, for sorbing CO2 in a first state, and for desorbing sorbed CO2 from the sorbent in a second state; - a first and a second support, connected to and supporting the sorbent at opposing spaced apart ends of the sorbent, supporting a central part of the sorbent extending between the first and second support through respective end parts of the sorbent abutting against the first and second support, wherein the central part of the sorbent is suspended between, and only supported through, the opposing spaced apart ends of the sorbent which sorption module is configured for allowing a gaseous composition comprising CO2, such as ambient air, to flow between an interior and an exterior through the tubular sorbent.

The invention relates to a preparation method of an internal thread of a low-density heat-proof material. The method comprises the following steps: processing a threaded hole bottom hole in the low-density heat-proof material layer; a bottom hole seepage pipe with a porous pipe wall is installed in a bottom hole of the threaded hole, and then structure reinforced resin is injected into the bottom hole seepage pipe and permeates into the low-density heat-proof material layer through the porous pipe wall of the bottom hole seepage pipe; curing the treated low-density heat-proof material layer, and tapping a heat-proof layer thread in the bottom hole of the threaded hole by adopting a tapping device; a threaded seepage pipe with a porous pipe wall is installed in a bottom hole of the threaded hole, then structure reinforcing resin is injected into the threaded seepage pipe and permeates into threads of the heat-proof layer threads through the porous pipe wall of the threaded seepage pipe, and then curing and thread finishing are conducted, so that preparation of the low-density heat-proof material internal threads is completed. The defects that the low-density heat-proof material is low in strength and effective threads cannot be formed are overcome, and the purpose of threaded connection of the low-density heat-proof material is achieved.

The application provides a concentrated brine interface evaporation device for anti-salt crystallization, comprising a photothermal evaporation unit, the photothermal evaporation unit comprises a hydrophilic hollow porous tube and a photothermal material layer coated on the outside of the hydrophilic hollow porous tube, the hollow axial direction and the diameter direction of the hydrophilic hollow porous tube form a three-dimensional multi-directional evaporation channel, on the one hand, the photothermal evaporation rate is improved, on the other hand, the salt ions in the photothermal material layer are quickly exchanged through the convection effect, and then flow into the inner layer low-concentration water, so that the photothermal layer is prevented from appearing salt crystallization. The inner layer and the peripheral wall of the hydrophilic hollow porous tube are formed with a porous structure through the hydrophilic hollow porous tube, the convection effect of the liquid in the hollow tube is enhanced, the evaporation amount of the device is evenly distributed to the surrounding through the three-dimensional structure design, the concentration of the evaporation surface is prevented from being too high, and the synergistic effect makes the device effectively inhibit the crystallization of salt in the device during the evaporation process.

The utility model discloses a farmland liquid level meter which comprises a perforated pipe, a vertical rod, a water filtering layer, a waterproof shell, a liquid level sensor, an acquisition communication module, a water guide strip and a power supply system. A sealing cover is arranged at the bottom of the perforated pipe, more than one hole is uniformly distributed on the pipe body, and the water filtering layer is wrapped outside the perforated pipe; the top of the perforated pipe is connected with the vertical rod, the top of the vertical rod penetrates through the waterproof shell, the collection communication module is installed in the waterproof shell, the power supply system supplies power to the liquid level sensor and the collection communication module, the number of the water guide strips is at least one, and the water guide strips are fixed to the outer side of the water filtering layer. The field liquid level monitoring device has the advantages of being energy-saving, small and exquisite and convenient to install, can be installed on a ridge of a farmland, and can accurately monitor the field liquid level while the operation of an agricultural machine is not influenced.

The utility model discloses a kind of automobile parts cleaning device, including support frame, support frame is fixed cleaning tank and water receiving tank, first support plate is equipped in cleaning tank, and its upper portion is connected second support plate through support column, and second support plate is equipped support rod and pneumatic clamp. Pump machine and driving motor are installed on support frame, and pump machine inlet end is connected water tank, and outlet is connected porous pipe and spray pipe on first support plate through first distribution pipe, second distribution pipe. Drainage hopper is equipped in the bottom of cleaning tank, and water tank is connected by drainpipe on hopper, and top is connected cover plate by pneumatic push rod. The device is targeted cleaning by porous pipe and spray pipe, realizes water recycling, and part is fixed stable, convenient to operate, suitable for a variety of automobile parts cleaning.

The utility model belongs to the technical field of polycaprolactam polymerization production, and particularly relates to a filter in an extraction tower and a filter system in the extraction tower used for polycaprolactam production and applying the filter. The filter in the extraction tower comprises a tubular filter screen, the tubular filter screen comprises a non-porous pipe and a filter outer pipe which are coaxially arranged inside and outside, filter holes are densely distributed in the pipe wall of the filter outer pipe, the pipe wall of the non-porous pipe is smooth and non-porous, one end of the filter outer pipe is gradually reduced to form a necking opening, and the end part of the non-porous pipe is fixedly connected with the necking opening of the filter outer pipe; and the height of the non-porous pipe is lower than that of the filtering outer pipe. The extraction tower inner filtering system comprises an extraction tower, an extraction tower inner filter is mounted on a filtering mounting pipeline of the extraction tower, and a necking opening of a filtering outer pipe is communicated with an overflow pipeline. According to the utility model, the siphonic effect is effectively reduced, the blockage of the filter is reduced, the frequent cleaning caused by the blockage of the filter is avoided, the shutdown time of an extraction procedure is reduced, and the production efficiency is improved.

The crude adipic acid thickening device provided in this embodiment of the invention features a central tube and a first porous tube that can move relative to each other. When blowing away the solid portion of the crude adipic acid slurry adhering to the outer filter screen, the central tube and the first porous tube are initially in a closed position. In this state, high-pressure gas cannot escape and remains inside the central tube, causing the pressure inside the central tube to continuously increase until a preset value is reached. Then, the central tube and the first porous tube move from the closed position to the open position. At this time, high-pressure gas is simultaneously and instantaneously released from various points on the first porous tube, blowing away the solid portion of crude adipic acid adhering to the outer filter screen. Compared to direct backflushing of high-pressure gas without accumulation, this embodiment of the invention achieves higher gas pressure inside the central tube. Furthermore, because multiple filter holes on the first porous tube open simultaneously, the pressure of the emitted gas is more uniform, resulting in a better blowing effect.

The invention relates to the field of gas-liquid uniform mixing equipment, and discloses a gas-liquid uniform mixing device for a multiphase multiphase pump, which comprises an outer shell sleeve, an outer shell and an inner shell, the outer shell sleeve is arranged on the outer wall of the upper end of the outer shell, the inner shell is coaxially arranged in the outer shell, the outer shell is provided with a baffle plate, the inner wall of the outer shell is provided with a guide plate, and the middle part of the lower end of the outer shell is provided with an extension pipe. A perforated pipe is arranged on the outer wall of the inner shell, an opening is formed in the upper end of the perforated pipe, a gap is formed between the inner wall of the perforated pipe and the outer wall of the inner shell, a plurality of jet flow holes are formed in the outer wall of the perforated pipe, and a concave pipe is arranged at the lower end of the perforated pipe and extends into the lower end of the inner shell; the spiral flow guide plate can remarkably prolong the motion path and the retention time of fluid, the jet flow holes formed in the outer wall of the porous pipe can enable a liquid phase to enter a gap between the inner wall of the porous pipe and the outer wall of the inner shell in a high-speed jet flow state, strong shearing force and a negative pressure adsorption effect are formed, and a gas phase obtained after preliminary separation is efficiently sucked into the gap; and secondary mixing of gas and liquid is realized.

The invention relates to the technical field of underground water level monitoring, and discloses a magnetostriction float type underground water level meter and an underground water level measuring method and device. Comprising a coiled pipe body, and the cross section of the coiled pipe body is provided with a central large circular hole and a plurality of small circular holes which are symmetrically distributed; a water inlet hole blocked by permeable stone is formed in the bottom of the pipe body capable of being coiled; the electronic bin is in sealed connection with the top of the pipe body capable of being coiled, the electronic bin is fixedly connected with the ground protection pipe through a tensile steel wire rope, and scale information is arranged on the surface of the tensile steel wire rope; the floater assembly is arranged in the central large circular hole and comprises a hollow floating body and a built-in permanent magnet; the waveguide sensing assembly is characterized in that a closed-loop measuring loop formed by a waveguide sensing wire and a cable is arranged in a small circular hole, and the closed-loop measuring loop generates a torsion wave signal through an excitation circuit in an electronic bin; the magnetostriction signal processing module is arranged in the electronic bin; and acquiring the extension length of the measured tensile steel wire rope, and calculating the underground water level according to the extension length and the relative displacement.

The application discloses a porous tubular methanol solid oxide fuel cell with a closed end, which is a tubular solid oxide fuel cell (SOFC) cell stack, and a plurality of tubular SOFC single cells are contained in the tubular SOFC cell stack; the bottom end of the inner tube of the tubular SOFC single cell is open, the top end is closed, the inner tube wall is provided with a plurality of closed sections and a plurality of open sections, and the plurality of closed sections and the plurality of open sections are arranged alternately in sequence along the moving direction of fuel in the inner tube. The inner tube structure of the tubular SOFC single cell can effectively improve the uniformity of the distribution of methanol on the anode surface of the solid oxide fuel cell, thereby effectively overcoming the serious problem of carbon deposition caused by the uneven distribution of methanol on the anode surface of the solid oxide fuel cell.

The utility model discloses a kind of microbial sewage treatment devices of feeding type, it is related to sewage treatment technical field, including microbial bed ontology, aerator and microbial inoculant filling mechanism, the microbial bed ontology includes drawer type microbial filler bin and the microbial carrier arranged in the microbial filler bin, the bin bottom of the microbial filler bin is equipped with a plurality of air holes, the aerator is fixedly connected below the microbial bed ontology, the microbial inoculant filling mechanism includes microbial feeder and microbial delivery porous pipe, the microbial delivery porous pipe is set in the upper of the microbial filler bin, the bottom discharge port of the microbial feeder is communicated with the microbial delivery porous pipe, a plurality of delivery channels are connected on the microbial delivery porous pipe, each the delivery channel is dispersedly arranged in the upper of the microbial filler bin.The utility model is convenient for the addition and replacement of microbial carrier and the bed of microorganism.

The present invention discloses a sensitive voltage ranging device for drilling cracks and a method for using the device, which belongs to the field of underground engineering technology. It includes a main rod body and a sensitive transformer. The main rod body is a hollow porous tubular structure. The outside of the main rod body is wrapped with an insulating shell. The end of the main rod body is provided with a discharge structure and multiple high-voltage nozzles. It is also provided with a movable annular sensitive voltage ranging device. After the slurry is fully sprayed into the cracks in the anchor hole, the electrode sheet is used to inject current into the slurry. The annular sensitive voltage ranging device detects the voltage generated from the inner surface of the crack to the device. The greater the voltage generated, the farther the distance. The voltage data of different sections are converted into position data by a data processor. Finally, the position data is used to perform crack imaging calculation, thereby detecting the size and distribution of the anchor hole cracks. The structure of the invention can detect the development and direction of the cracks, and has the advantages of accurate detection, reasonable structure, stable function, and economical applicability.

The utility model provides a filter element of a suction filtration kettle, and belongs to the technical field of filter elements. The problem that an existing filter element is low in filtering efficiency is solved. The filter element of the suction filtration kettle comprises a sintering pipe with micropores and a non-porous pipe located in the sintering pipe, the open end of the sintering pipe is fixedly connected with a connector, the top end of the non-porous pipe is fixedly connected with the connector in a sealed mode, a gap is formed between the bottom end of the non-porous pipe and the closed end of the sintering pipe, and a certain distance is formed between the outer circumferential wall of the non-porous pipe and the inner circumferential wall of the sintering pipe. The filter element of the suction filtration kettle has the advantages that enough pressure difference exists inside and outside the filter element, and the filtering efficiency of the filter element is improved.

The invention discloses a combustion heating type reforming hydrogen production reactor with low heat loss, which is of a multilayer tubular communicating and wrapping structure which is coaxially and hermetically spaced, and comprises an inner perforated pipe, a surface combustor, a combustion chamber, a reforming chamber, a raw material cavity, a fuel secondary preheating cavity, a smoke exhaust chamber and a fuel primary preheating cavity which are coaxially and fixedly arranged at intervals from inside to outside. According to the low-heat-loss combustion heating type reforming hydrogen production reactor, the combustion chamber, the reforming chamber, the fuel second-stage preheating cavity, the smoke exhaust chamber and the fuel first-stage preheating cavity are integrated to serve as heat conduction components to work cooperatively, the structure is compact, the size is small, the weight is light, and compared with an electric heating reforming device, the low-heat-loss combustion heating type reforming hydrogen production reactor can achieve multi-stage preheating; heat utilization of all stages of chambers can be remarkably improved, so that heat dissipation loss and smoke exhaust heat loss are reduced to the maximum extent, meanwhile, medium and low temperature waste heat in reforming reaction products can be fully recycled, secondary waste of high-quality heat energy is reduced, the overall energy utilization efficiency of the system can be remarkably improved, and the system is particularly suitable for reforming hydrogen production.

The utility model discloses a noise reduction type pneumatic motor, which relates to the field of pneumatic motors and comprises a motor main body, an air outlet pipeline is fixedly mounted on the motor main body, a noise reduction cover is sleeved on the motor main body and consists of a first sponge sleeve and a rubber air bag sleeve, and the rubber air bag sleeve is fixedly sleeved on the first sponge sleeve. A silencer is installed on the air outlet pipeline and composed of a shell, a second sponge sleeve, a first partition plate, a second partition plate, a third partition plate, an air inlet threaded pipe, an air outlet threaded pipe and a porous pipe, the second sponge sleeve is fixedly installed on the inner wall of the shell, and the first partition plate, the second partition plate and the third partition plate are all fixedly installed on the inner wall of the second sponge sleeve; the noise reduction cover is arranged on the motor main body, the noise reduction cover adopts a dual-structure design of the first sponge sleeve and the rubber air bag sleeve, the first sponge sleeve effectively absorbs high-frequency vibration noise, the rubber air bag sleeve blocks low-frequency noise, and the overall noise during operation of the motor main body is remarkably reduced through the synergistic effect of the first sponge sleeve and the rubber air bag sleeve.

The utility model relates to the technical field of sock processing, and discloses a shaping and drying all-in-one machine for sock processing. According to the shaping and drying all-in-one machine for sock processing, by arranging the drying mechanism, efficient and comprehensive drying and auxiliary shaping functions are achieved, hot air can be blown to the surfaces of socks from the outer side through the design of a first pump body and an air guide cover, the outer contours of the socks are covered with large-area air flow generated by the first pump body and the air guide cover, and moisture in fibers of the outer layers of the socks is promoted to be rapidly evaporated; the socks can be dried from the inner side through the design of the second pump body and the perforated pipe, the first pump body and the second pump body are used in cooperation to form vertical bidirectional and uniform hot air circulation, all parts of the socks can receive balanced heat through the unique airflow mode, the sock drying process is greatly accelerated, and the sock drying efficiency is improved. And meanwhile, the hot air flow in the vertical direction can assist steam to better permeate into fibers of the socks, and the quality and efficiency of sock processing are improved.

The application relates to a basement anti-seepage structure for building engineering, belonging to the technical field of basement waterproofing, which comprises a cushion layer, the upper surface of the cushion layer is rigidly cast with a concrete bottom plate, the upper side of the concrete bottom plate is provided with a water-permeable concrete layer, the upper surface of the water-permeable concrete layer is flexibly bonded with a decorative panel; an anti-seepage mechanism for preventing groundwater seepage is arranged between the concrete bottom plate and the water-permeable concrete layer, and an extraction mechanism is arranged on the decorative panel. The basement anti-seepage structure for building engineering is provided with the integrated anti-seepage mechanism between the concrete bottom plate and the water-permeable concrete layer, realizes integrated protection of resistance-conduction-drainage-monitoring, and forms a double rigid-flexible barrier together with a waterproofing membrane and a microcapsule self-repairing coating, so that the initial groundwater seepage is effectively inhibited; the drainage cushion is embedded with X / Y axial porous pipes, and is communicated with a plurality of water collecting cavities through a drip pipe, so that a grid partitioned flow guiding network is formed, and it is ensured that the seepage water is quickly captured and directionally collected.

Methane may be reformed through use of a solar reformer. Example methods of methane conversion through solar energy may include: supplying water and methane to a reaction chamber of a solar reformer unit; directing, using a solar reflector external to the reaction chamber, sunlight to one or more exterior solar absorbers of one or more solar absorbers; converting the sunlight into heat with the one or more solar absorbers; directing a portion of the heat converted by the one or more exterior solar absorbers to an interior of the reaction chamber using one or more light-porous pipes disposed within the reaction chamber; vaporizing at least a portion of the water to steam; and generating, within the reaction chamber, a reformate gas from the methane and the steam by a steam-methane reaction aided by one or more catalyst rods disposed within the reaction chamber.

The utility model belongs to the technical field of fluid machinery, concretely relates to a kind of anti-vibration backwater device for cooling water backwater system, including water tank and backwater pipe, the top wall of water tank is equipped with mounting port, the inside of water tank is connected by backwater pipe through mounting port;Connecting flange is installed at mounting port, the bottom of connecting flange is connected with the communicating pipe that is communicated with backwater pipe;The other end of communicating pipe is sequentially connected with elbow and gradually expanding pipe, the inner diameter of one end of gradually expanding pipe and elbow connection is less than the inner diameter of the other end of gradually expanding pipe;The other end of gradually expanding pipe is connected with porous pipe;In the application, the cross-sectional area of water flow is enlarged during gradually expanding pipe process, flow rate is reduced, kinetic energy is converted into static pressure energy;Subsequently, impact energy is further dissipated by being dispersed into multiple streams through porous pipe;In this way, the problem of vibration and noise of water tank caused by high flow rate water flow in recovery pipeline is solved.

The invention discloses a temperature sensor for controlling the opening degree of a valve of a bleed air temperature control system, belongs to the technical field of pressure expansion type temperature sensors, and solves the problems that an existing temperature sensor is poor in vibration resistance and cannot be repaired. The device specifically comprises a sleeve; a temperature sensing conduit is arranged in the sleeve, the end part of the temperature sensing conduit is connected with a sealing end cover, and the sealing end cover is connected with a porous pipeline; an oil path is arranged in the sealing end cover; the porous pipeline is sleeved with a corrugated pipe assembly, and the end of the corrugated pipe assembly is connected with a center rod. According to the invention, when the environment temperature rises, the temperature-sensitive medium filled in the temperature-sensitive guide pipe expands and enters the porous pipeline, and then flows out of the porous pipeline to push the corrugated pipe assembly to extend, so that the central rod is pushed to move; the supporting assembly is used for supporting the temperature sensing guide pipe, and large stress concentration is prevented from being generated at the root of the temperature sensing guide pipe when the temperature sensing guide pipe bears strong vibration in the service process; meanwhile, due to the design of the single-channel oil way and the detachable corrugated pipe assembly, the product is convenient to repair.

The invention discloses rural domestic sewage underground absorption equipment, and relates to the technical field of absorption equipment, the rural domestic sewage underground absorption equipment comprises an absorption mechanism and a septic tank, one side of the septic tank is fixedly connected with a blow-off pipe penetrating through an inner cavity of the septic tank, the absorption mechanism comprises a porous pipeline, one end of the blow-off pipe is connected with one end of the porous pipeline, and the other end of the blow-off pipe is connected with the other end of the porous pipeline. The outer side of the porous pipeline is sleeved with an absorption pipe, the absorption pipe is provided with a plurality of water dispersing holes which are through internally and externally, an external thread ring is fixedly installed on the front side of the outer wall of the porous pipeline, and a limiting sealing mechanism is arranged on the rear side of the outer wall of the porous pipeline. Through a double-layer filtering structure, the inner layer is filled with porous zeolite to adsorb nutrient salts such as ammonia nitrogen and phosphorus, and the outer layer is filled with high-adsorbability ceramsite to remove organic matters and heavy metals, so that purified water slowly permeates into soil through the water dispersing holes of the absorption pipe, N and P nutrients in sewage are converted and utilized by the soil, and recycling is realized.

This utility model discloses a MET composite ecological treatment component, including a box and, from top to bottom, a layer of anthracite, a layer of quartz sand, a layer of magnetite sand, an activated carbon layer, and an adsorption chamber arranged in sequence within the box. Sliding grooves are provided on the left and right sides of the inner wall of the box, and sliding strips are provided on both sides of the adsorption chamber, slidingly engaged within the sliding grooves. An openable side door is also provided on the front side of the box for the adsorption chamber to slide out of the box. The adsorption chamber includes several concentrically arranged annular drainage zones and annular adsorption zones. The annular drainage zone includes several circumferentially arranged UPVC porous pipes, the upper end of which is connected to the outlet of the inlet hopper, while the lower end is closed. Several drainage holes are provided on the sidewalls of the UPVC porous pipes. The annular adsorption zone includes several circumferentially arranged lanthanum-loaded resin adsorption columns that adsorb and separate phosphate ions from the wastewater flowing out of the drainage holes.

The utility model provides a kind of new feed water pump circulation pipe structure for deaerator, belong to deaerator technical field.The deaerator circulation pipe of traditional single pipe structure is solved when the output of unit increases, the problem of excessive noise and vibration and impact of the internal components of deaerator due to the increase of circulating water quantity.It includes double-layer sleeve pipe, upper cover plate and lower supporting plate, the double-layer sleeve pipe includes porous pipe and energy dissipation device cylinder, the energy dissipation device cylinder is coaxially sleeved outside the porous pipe, the pipe wall of the porous pipe and energy dissipation device cylinder is provided with through hole, the top end of the porous pipe and energy dissipation device cylinder is connected with upper cover plate, the bottom end of the energy dissipation device cylinder is connected with lower supporting plate, the center of the lower supporting plate is provided with round hole, the bottom of the porous pipe is provided with extension pipe, the extension pipe penetrates lower supporting plate, penetrates deaerator cylinder and extends to outside after penetrating lower supporting plate.It is mainly used as the circulation pipe of deaerator.

The application discloses a temperature sensor for controlling the opening degree of a bleed air temperature control system, and belongs to the technical field of pressure expansion type temperature sensors, and solves the problems of poor vibration resistance and inability to repair of the existing temperature sensor; and specifically comprises a sleeve; a temperature sensing pipe is arranged in the sleeve; a sealed end cover is connected to the end of the temperature sensing pipe; and a porous pipeline is connected to the sealed end cover; an oil channel is arranged in the sealed end cover; a corrugated pipe assembly is arranged outside the porous pipeline; and the end of the corrugated pipe assembly is connected to a central rod. In the application, when the ambient temperature rises, the temperature sensitive medium filled in the temperature sensing pipe expands and enters the porous pipeline, and then flows out from the porous pipeline to push the corrugated pipe assembly to elongate, and further push the central rod to displace; the support assembly supports the temperature sensing pipe, and avoids the generation of large stress concentration at the root of the temperature sensing pipe when strong vibration is borne during the service process; meanwhile, the design of the single-channel oil channel and the detachable corrugated pipe assembly makes the product have convenient repairability.

The application discloses a kind of intelligent weighing type liquid level meter and medium liquid level, density measurement method, including porous pipe shell, weighing sensor, weighing transmitter, acquisition communication terminal, sink, power supply module, weighing sensor is installed in the inside of porous pipe shell top, and is electrically connected with heavy transmitter, sink is hung on the weighing sensor by flexible line, weighing transmitter is electrically connected with acquisition communication terminal, and power supply module is powered to weighing sensor, weighing transmitter, acquisition communication terminal.The application can realize the accurate liquid level monitoring under the unknown density or variable density of the liquid to be measured, can be applied to the complex scene such as solute concentration change industry, complex water conservancy industry such as river silt condition, and has high popularization and application value.

A refrigeration device (10) includes: a first refrigerant circuit (21) including a first heat exchanger (26) that dissipates heat from a first refrigerant, the first refrigerant being carbon dioxide; a second refrigerant circuit (22) including a second heat exchanger (36) for dissipating heat from a second refrigerant having combustibility or toxicity or a second refrigerant having a global warming coefficient of 4 or more, and a pressure reducer (38) for reducing the pressure of the second refrigerant; and a third heat exchanger (27) that exchanges heat between the first refrigerant after heat dissipation in the first heat exchanger (26) and the second refrigerant after heat dissipation in the second heat exchanger (36) and after pressure reduction in the pressure reducer (38), the second heat exchanger (36) having a plurality of flat perforated pipes (36b).

The invention discloses a forming method for manufacturing a PTFE pipe and coating perfluoropolyether oil, which comprises the following steps: mixing PTFE dispersion resin with oil, performing, and extruding to obtain a PTFE extrusion pipe, in the extrusion process, using a support member and a shielding device to cooperate with an additional coating to the outer surface of a PTFE pipe main body; then drying and carrying out stretching treatment; the stretched PTFE extrusion pipe is dried and sintered, and finally, the PTFE extrusion pipe is cut and rolled after being subjected to heat setting under tension, and the porous PTFE pipe is obtained. Coating protection is added in the PTFE pipe extrusion process, the viscosity of the PTFE pipe is reduced, the forming and subsequent stretching effects of the PTFE pipe are enhanced, micropores are formed uniformly, and the product quality is good.

Provided are: a heat exchanger capable of suppressing frosting of flat perforated pipes on the lowermost layer; and a refrigeration cycle device provided with the heat exchanger. The first heat exchanger (11) is provided with a plurality of flat perforated pipes (110) arranged side by side in the vertical direction, and a flow divider (170) serving as a pressure loss part. The plurality of flat perforated tubes includes flat perforated tubes of a first tube group (114) and flat perforated tubes of a second tube group (116) other than the flat perforated tubes of the first tube group. The first tube group forms a first passage (P1). The first passage is a flow path for a refrigerant including a flat perforated tube (110L) disposed in the lowermost layer of the first heat exchanger. The second tube group forms a second passage (P2) as a flow path for the refrigerant. When the first heat exchanger functions as an evaporator, at least a part of the refrigerant supplied to the first heat exchanger flows through the first passage, then flows into the pressure loss part, flows out of the pressure loss part, and flows into the second passage.