25 results about "Concentric cylinder" patented technology

An apparatus fixed to a water vehicle to produce electric energy has a turbine rotor supported under the water surface in a horizontal operation position and to it fixed first axis to transfer the rotation motion from the rotor and in which apparatus the rotor has been supported and adapted into with it same centered cylinder that has been fixed to the frame with vertically to it fixed joint that is situated a vertical distance (a) from the rotor and adapted to turn in relation to the frame that has been fixed to the water vehicle round the joint axis and to settle into the direction of the water flow by its power and where the first part of the second axis has been adapted same centered with the joint axis and the first and the second axis have been connected to each other with a rotation movement direction changer when the horizontal rotation of the first axis has been adapted to change into a vertical rotation movement in the first part and the second axis has been connected to a generator to transfer the rotation movement into it and the generator has been connected to a battery to store the generated electric energy to it.

The utility model discloses a leakproof sealing structure of a pneumatic power mechanical element, which comprises an air cylinder, an air inlet and an air outlet, the air inlet and the air outlet are arranged on two sides of the air cylinder, a lower concentric cylinder is embedded and fixed in each of the air inlet and the air outlet, an upper concentric cylinder is in threaded connection with the lower concentric cylinder, a connector is fixedly connected onto the upper concentric cylinder, and the connector is in threaded connection with the lower concentric cylinder. A clamping plate is connected to the side of the connector in a clamped mode, a locking screw rod is connected to the surface of the clamping plate in an inserted mode, an air pipe is fixedly connected to the connector, and a throttling valve and an electromagnetic valve are arranged on the air pipe. The upper cylinder and the lower cylinder which are concentric are arranged at the air inlet and the air outlet of the air cylinder, air can be prevented from leaking from the air inlet and the air outlet of the pipeline and the air cylinder, meanwhile, the clamping plate and the locking screw are arranged at the pipeline connector, the connector for fixing the pipeline can be further reinforced, the problem that the connector shakes under the impact of the air is solved, and the service life of the air cylinder is prolonged. Therefore, the pneumatic power mechanical element has the leakproof sealing effect.

The invention provides a graphite core column for high-temperature and high-pressure synthesis of high-thermal-conductivity diamond and a preparation method, the graphite core column is of a three-layer concentric cylinder structure, and the graphite core column is sequentially composed of a nitrogen removal core layer, a catalytic reaction layer and a sealing pipe layer from inside to outside. The nitrogen removal core layer forms an active defense system, Ti / Zr elements located in the core react with nitrogen to produce stable nitrides, nitrogen impurities are firmly captured and fixed to the nitrogen removal core layer, and the diamond growth environment of the catalytic reaction layer is purified; and the catalytic reaction layer is formed by mixing a Ni-Mn-Cu ternary catalyst and graphite. The catalyst system ensures that the dynamic processes of dissolution and precipitation of the carbon source in the catalyst are consistent, and stable growth of diamond single crystals is facilitated; the outer-layer sealing pipe graphite is used for sealing an internal reaction system and preventing external pollution. The three layers of structures perform their own functions and cooperate with one another, impurity removal, growth and pressure maintaining are integrally designed, and the system solves the three core problems of nitrogen pollution, uneven growth and pressure fluctuation in synthesis of the high-thermal-conductivity diamond.

This invention relates to the field of angular contact ball bearing processing technology, and more particularly to a high-precision assembly fixture specifically designed for angular contact ball bearings. It includes an assembly box, an inner cylinder positioning assembly, an outer cylinder positioning assembly, and a temperature-conducting assembly. This invention utilizes the principle that semiconductor materials absorb and release heat at their two ends when energized, and, in conjunction with the lifting and rotating of the temperature-conducting assembly with a concentric cylinder structure, achieves flexible switching between cooling and heating. By attaching the heating / cold ends of the temperature-conducting assembly to the temperature-conducting platform, the temperature of the angular contact ball bearing is specifically adjusted, and the principle of thermal expansion and contraction is used to control the installation space. During assembly, the inner and outer cylinder positioning assemblies, working together, not only fix and limit the inner and outer cylinders respectively, but also automatically complete the installation of the balls. The installation methods are diverse, the process is highly controllable and automated, and it meets the high-precision requirements of different types of angular contact ball bearings.

The utility model discloses an energy-saving type heating network heater, and particularly relates to the technical field of heating network heaters, the energy-saving type heating network heater comprises a tank body, a hollow end cover is installed at an opening of the tank body, and a fixed concentric cylinder and a movable concentric cylinder are inserted in a staggered mode to divide an inner cavity of the tank body into a reciprocating zigzag flow channel extending from the axis to the annular outer wall; a plurality of heat exchange pipes extending in the same direction as the reciprocating zigzag flow channel are installed in the reciprocating zigzag flow channel, one ends of the heat exchange pipes jointly penetrate through the hollow end cover and jointly communicate with an integrated ring, the other ends of the heat exchange pipes jointly communicate with an integrated plug, a separator is fixedly embedded in the tank body, and the integrated plug communicates with an inner cavity of the separator; according to the heat exchanger, the flowing distance of a heating medium in a shell pass is prolonged, and meanwhile, the heat exchange efficiency is high when the heating medium and cold water oppositely flow in the tank body.

Broad volumetric range pipettes with multi-tiered pipette tip holder and ejection assemblies and methods of using such pipettes are disclosed herein. These pipettes typically include a concentric cylinder arrangement with each outer cylinder configured for contacting and dislodging a pipette tip attached to the tip holder portion of the immediately adjacent inner cylinder. In this manner, different sized pipette tips can be used on a single device. In addition, a locking mechanism is described for locking the large tip holder into a downward position to minimize the extension of the small tip holder and thereby enabling attachment of large, filtered pipette tips and reducing / eliminating the risk that the liquid being transferred will contaminate the pipetting device.

A wind powered turbine is disclosed that comprises two concentric cylinders. The first cylinder is located within the perimeter of the second cylinder. Both the first cylinder and the second cylinder comprise a plurality of blades. The first cylinder and its blades move in response to wind activity. The second cylinder and its blades do not move when the first cylinder and its blades are moving. The curvature of the blades of the first cylinder and the curvature of the blades of the second cylinder are in different directions with respect to each other.

The invention provides a high-strength flame-retardant composite insulator device. The high-strength flame-retardant composite insulator device comprises a gradient functional composite core rod, an umbrella skirt group, an upper-end fitting and a lower-end fitting, the composite core rod with the gradient function is of a three-layer concentric cylinder structure and comprises an inner layer, a middle layer and an outer layer. The inner layer is formed by compounding E-glass fibers and epoxy resin; the middle layer is an epoxy resin matrix, and phase change microcapsules are uniformly dispersed in the middle layer; the outer layer is an epoxy resin matrix doped with a mixed filler of graphene and boron nitride; the gradient functional composite core rod is of a three-layer concentric structure, the inner layer is E-glass fiber / epoxy resin, and high tensile strength is guaranteed; the middle layer contains phase change microcapsules, so that heat energy absorption and temperature control buffering are realized; the outer layer is doped with the graphene and boron nitride mixed filler, so that the composite insulator has high thermal conductivity and intrinsic flame retardance, combustion is effectively inhibited, heat dissipation is accelerated, and the contradiction that a traditional insulator is not flame-retardant if being strong and is weak in flame retardance if being strong is solved.

The application discloses a kind of simulation near wellbore radial layered permeability loss combined formation physical model and preparation method thereof.The method uses sand type 3D printing technology, with furan resin and amorphous silica sand as raw material, and is integrally formed to prepare combined formation model containing prefabricated wellbore structure, which is composed of inner / middle / outer three independent concentric cylinder structures, realizes the simulation of permeability loss of each part of formation by vacuum permeation modifier post-processing.The inner / middle / outer three independent concentric cylinder structures are 3D printed according to the designed inner and outer diameter size, and to ensure the smooth assembly of three parts of structure, the inner diameter size of each part of structure is designed to reserve 0.5-1mm deformation redundancy (deformation joint).In the vacuum permeation post-processing process, nanometer silicon dioxide solution is used as modifier, vacuum saturation device is used for vacuum permeation treatment of component, and by changing the negative pressure holding time (5-10min) of each cycle and the vacuum saturation cycle number of each component, the independent and quantitative control of permeability of different structure layers is realized, so as to obtain the combined formation model with radial layered permeability difference from wellbore outward.The method can accurately and quantitatively prepare simulation near wellbore formation radial heterogeneous permeability loss, and has the advantages of flexible operation, low cost and strong controllability, which can provide reliable model preparation method for physical simulation of oil and gas reservoir development and underground pollutant migration.

Device for mechanical separation of distillate fractions has for a novelty a rotating vessel (104) mounted concentrically with a vertical pipe (102), between an overflow ring (103) and a segmented collector vessel (105), wherin the rotating vessel (104) contains two concentric cylindrical walls and a bottom in the form of a circular ring connected to a distillate outlet (109). The rotating vessel (104) can rotate around the vertical tube (102) axis. The collector vessel (105) is located below the rotating vessel (104), and fixed to the vertical pipe (102) and consists of several segments separated by partition walls (108), where each segment has an independent distillate drain (109) which is connected to the storage tanks. The device also includes an inlet (101), the overflow ring (103) and a discharge valve (110). The distillate is fed into the vertical tube (102), where it is raised and poured over the overflow ring (103), and then collected in the rotating vessel (104) which direct the liquid to the corresponding segment of the collector vessel (105).

The invention relates to a heat exchanger (3) with two fluid circuits, comprising: - a shell (30) formed by two concentric hollow cylinders (31, 32), having a central axis (X), and defining therebetween an annular space; - plates (300) each having a straight cross-section perpendicular to the central axis X, in the form of a portion of the involute of a circle or of a curve having a radius of curvature that increases from the inner cylinder towards the outer cylinder and close to an involute of a circle, the plates each connecting the two cylinders of the shell and being parallel to one another in the annular space, while delimiting therebetween, on either side of the same plate, a channel (33) of one of the two fluid circuits, referred to as the first circuit and, within each of the plates, a channel (34) of the other one of the two fluid circuits, referred to as the second circuit.

Heat exchanger with at least two fluid circulation circuits, with a jacket of two concentric cylinders between which are arranged plates of general involute shape; Use in a nuclear reactor with molten liquid salt(s).The invention relates to a two-circuit fluid heat exchanger (3) comprising: - a casing (30) formed by two concentric hollow cylinders (31, 32) with a central axis (X), defining an annular space between them; - plates (300), each having a straight cross-section perpendicular to the central axis X in the form of a portion of an involute of a circle or a curve with a radius of curvature increasing from the inner cylinder to the outer cylinder and close to an involute of a circle, the plates each connecting the two cylinders of the casing and being parallel to each other in the annular space, delimiting between them, on either side of the same plate, a channel (33) of one of the two fluid circuits, called the first circuit, and within each of the plates a channel (34) of the other of the two fluid circuits, called the second circuit. Figure for the abstract: Fig. 7A.

A vent assembly, including a backplate having plurality of concentric cylinders arranged in an order of decreasing diameter, such that the concentric cylinders are separated by score lines and at least one of the cylinders is recessed from the backplate, and a vent flapper. The assembly may include a tube configured to attach to one of the cylinders and one or more tube stoppers to prevent the tube from being over inserted. The assembly may include a face plate, a tooth formed on the backplate, and a tooth receiver is formed on the face plate. The score lines may be dual-sided score lines. The assembly may include the vent flapper having one or more air intake openings formed within the vent flapper, such that the air intake openings allow air to flow both in and out.

The invention discloses a textile thermal insulation performance test system and method, and the system comprises a sealed test cabin which is used for simulating different environments; the concentric cylinder testing structure is located in the middle of the closed testing cabin, the cylinder testing structure comprises an inner cylinder and an outer cylinder, and an annular cavity between the inner cylinder and the outer cylinder is used for containing a tested textile; a heating element is arranged in the inner cylinder; the annular cavity comprises a temperature sensor array, and at least part of temperature sensors in the temperature sensor array are distributed on the outer side of the inner cylinder and the inner side of the outer cylinder. According to the scheme, the tested textile is placed by adopting the concentric cylinder testing structure which better conforms to the human body curved surface shape, so that the normal wearing state of the clothes can be better simulated, and the shape error between flat plate testing and real wearing is reduced; the thermal insulation performance parameters of the tested textile are determined by combining the temperature value and the heat flow detected in the test environment, the test result is more accurate, and the method has better actual reference value.

Radial flow adsorber comprising an adsorber body, wherein the adsorber body has an upper sealing head, a cylinder, a lower sealing head and a pressed jacket connected to an upper connecting tube and a lower connecting tube, characterized by the fact that the upper sealing head and the lower sealing head of the jacket are each provided with an upper gas inlet and outlet pipe 1-1 (3-1) and a lower gas inlet and outlet pipe 1-11 (3-13), a support seat 1-10 (3-12) is arranged at the bottom of the body, an adsorption cylinder is arranged above the support seat and consists of several concentric cylinders with different diameters, by means of which several annular spaces are formed by means of the concentric cylinders with different diameters, into which different types of adsorbents 1-5 (3-8), 1-6 (3-9) can be filled, and the adsorption cylinder comprises a pore plate or a grid, wherein the adsorption body comprises an inner cylinder 1-7 (3-4), one or more middle cylinders 1-8 (3-5, 3-6) and an outer cylinder 1-9 (3-7), the lower ends of the inner cylinder 1-7 (3-4), the one or more middle cylinders 1-8 (3-5, 3-6) and the outer cylinder 1-9 (3-7) are each firmly connected to a support seat 1-10 (3-12), the support seat 1-10 (3-12) is firmly or detachably connected to the carrier on the body, the inner cylinder 1-7 (3-4) and the one or more middle cylinders 1-8 (3-5, 3-6) are in sliding connection with the upper sealing head assembly 2, the outer cylinder 1-9 (3-7) is firmly connected to the upper sealing head 2, the inner cylinder 1-7 and the one or more middle cylinders 1-8 (3-5, 3-6) can expand and contract independently and freely in the axial direction of the cylinder, and wherein the base of the support seat 1-10 (3-12) is fixed, can deform axially upwards when heated and can also expand and contract freely in a radial direction, and wherein the sealing structure 1-2 (3-2), 1-3 (3-3) allows the axial free expansion of the inner cylinder and one or more middle cylinders without being affected by other internal parts, and wherein the sealing structure 1-2 (3-2), 1-3 (3-3) can also prevent process air from penetrating without being treated by the adsorbents 1-5 (3-8), 1-6 (3-9), and wherein the axial expansion of the outer cylinder and the pressed shell is synchronous and wherein a gas flow channel between the outer cylinder 1-9 (3-7) and the pressed jacket 1-4 (3-11) is arranged so that the outer cylinder 1-9 (3-7) and the pressed jacket 1-4 (3-11) do not have a very large temperature difference under all operating conditions.

The invention belongs to the technical field of photovoltaic cells, and provides a cerium-doped indium oxide-based evaporation target material and a preparation method and application thereof. The cerium-doped indium oxide-based evaporation target material is of a concentric cylinder structure and comprises a central cylinder and a hollow annular cylinder wrapping the periphery of the central cylinder, the central cylinder and the hollow annular cylinder share the same center, the central cylinder and the hollow annular cylinder are indium cerium oxide, but the cerium content of the central cylinder and the cerium content of the hollow annular cylinder are different, and the cerium-doped indium oxide-based evaporation target material comprises 95-98 wt% of indium oxide and 5-10 wt% of cerium oxide. 3-5 wt% of cerium oxide; in the hollow annular cylinder, the indium oxide accounts for 99-99.9 wt%, and the cerium oxide accounts for 0.1-1 wt%. The density of the target material is 4.169-4.226 g / m < 3 >, the resistivity is as low as 78.9-86.3 omega.cm, the evaporation efficiency and uniformity of the target material can be effectively improved, target material residues are avoided, and the utilization rate of the target material is improved.

Enhanced combustion ignition cord: An ignition cord for the combustion of a propellant charge contained within a cartridge case, said cord consisting of a core comprising a pyrotechnical material and surrounded by a sheath, characterized in that the sheath consists of two concentric cylindrical tubes between which is arranged a free-flowing powdered energy material. The two tubes are made of an inert polymer material or are based on an extruded powdered energy material, or alternatively, one of the tubes may be made of an inert polymer material and the other of an extruded powdered energy material.

This invention discloses a fishery aquaculture vessel with a double-ring modular aquaculture tank and its implementation method. By designing a double-ring aquaculture tank composed of concentric cylinders in the aquaculture vessel, where the inner cylinder and outer ring space are used as independent aquaculture tanks, the stability and uniformity of water flow are effectively improved, reducing water flow turbulence and energy waste. The double-ring design can significantly reduce the impact of free surface effects on ship stability and the aquaculture environment. The conical boundary design helps reduce water ripples and promotes the concentrated sedimentation of aquaculture waste to the collection trap in the center of the tank bottom, facilitating waste discharge and cleaning. In addition, the smooth surface design reduces marine organism attachment and lowers the difficulty of removal. The modular design of the double-ring aquaculture tank can be carried out in parallel with ship construction, which can significantly shorten the shipbuilding cycle and reduce construction costs.

The invention discloses an umbrella protection device which comprises a protection outer cylinder, a protection inner cylinder is coaxially fixed in the protection outer cylinder, a plurality of spacer rings arranged from one end to the other end of the protection inner cylinder at intervals are fixed to the inner wall of the protection inner cylinder, and an annular cavity is further formed between the protection inner cylinder and the protection outer cylinder. A plurality of first water guide holes communicating the interior of the protective inner cylinder with the interior of the annular cavity are further formed in the protective inner cylinder, a liquid receiving cylinder communicating with the interior of the annular cavity is further detachably connected to one end of the protective outer cylinder, a concentric cylinder is further fixed in the liquid receiving cylinder, and the protective inner cylinder abuts against the concentric cylinder. The problem that in the prior art, residual water on a large-size non-foldable umbrella is likely to be scattered to the surrounding ground, and danger is possibly caused is solved.

The invention discloses a reverse grouting device and method, relates to the technical field of in-situ leaching uranium mining well drilling construction, and aims at solving the problems that in an existing reverse grouting device, cement paste flows back into a plastic sleeve, and a spring reset check device is difficult to manufacture and prone to damage. The device comprises a plastic sleeve, the bottom of the plastic sleeve is fixedly connected with the outer edge of a sealing nylon pipe in a concentric cylinder shape, the inner edge of the upper portion of the sealing nylon pipe is connected with the lower portion of a guiding nylon pipe, a bottom grouting pipe is connected to the interior of the guiding nylon pipe through threads, and a common grouting pipe is further connected to the bottom grouting pipe through threads. And the top of the plastic sleeve is also provided with an orifice sealing component of which the middle part is used for the common grouting pipe to pass through the small hole.

The utility model provides a hydrogen peroxide fixed bed hydrogenation tower for strengthening material distribution. The hydrogen peroxide fixed bed hydrogenation tower comprises a radial distributor and a catalyst bed layer, the catalyst bed layer is positioned inside the hydrogenation tower main body, and the radial distributor is arranged in the catalyst bed layer; the radial distributor comprises at least two concentric cylinders with different diameters and baffles; the adjacent cylinders are connected through a baffle plate; the cylinder on the outermost layer is an outer cylinder, the cylinder on the innermost layer is an inner cylinder, and the outer cylinders are connected with the inner wall of the hydrogenation tower through baffles; the baffle and the cylinder are consistent in height. According to the utility model, the radial distributor is additionally arranged below the catalyst bed layer, and the barrel body and the tower wall are separated by the baffle, so that each sealing area is ensured to belong to an independent system, the working solution is restrained in a fixed range, and the influence of working solution bias flow caused by catalyst caking is reduced.

A smoke detector testing apparatus comprises an outer 1 and inner 10 concentric cylinder, each of which form a bowl shaped chamber at one end. The inner cylinder 10 is sized to fit snugly within the o

The invention discloses a 3-1 / 1-3 type piezoelectric composite material and a preparation method thereof.The 3-1 / 1-3 type piezoelectric composite material is of a concentric cylinder structure and comprises a cylindrical 3-1 type piezoelectric composite material core function layer and an annular 1-3 type composite material peripheral coupling layer; the core functional layer comprises a cylindrical first piezoelectric phase and a plurality of first polymer phases embedded in the first piezoelectric phase; the peripheral coupling layer comprises an annular second polymer phase and a plurality of second piezoelectric phases embedded in the second polymer phase; the thickness of the core function layer is equal to that of the peripheral coupling layer, and a middle bonding layer is further arranged between the core function layer and the peripheral coupling layer; and the ratio of the diameter of the core function layer to the diameter of the peripheral coupling layer is 0.4-0.7, so that the bandwidth broadening effect is improved. The compatibility of thickness vibration modes of the 1-3 type composite material and the 3-1 type composite material is utilized, coupling transmission of vibration energy is achieved through structure integration, two single-peak formants are overlapped and widened, and finally broadband response of the composite material is formed.