955 results about "Cylindrical tube" patented technology

Disclosed are lattice materials including a truss structure obtained by arranging struts to form at least two triangles on each side of a polygon (i.e., a triangle, a quadrilateral, or a hexagon), which are used in many engineering fields, especially in materials engineering. The elastic modulus values per unit weight of many of the lattice materials produced from the truss structure are higher than those of the most existing cellular solids with stochastic cell distributions and many existing lattice materials. Using the truss structure disclosed herein, it is possible to produce two-dimensional (planar) lattice materials as well as spherical or tubular lattice structures in the form of a first cylindrical tube or a second cylindrical tube.

The invention belongs to the technical field of hydrocyclones, and discloses a two-stage series integrated nested classification hydrocyclone which comprises a first-stage cylinder, the top end of the first-stage cylinder is connected with a top cover, and the top cover of the first-stage cylinder is connected with an overflow pipe; the bottom end of the first-stage cylinder is connected with an inverted outer circular truncated cone cylinder, an upright inner circular truncated cone cylinder is arranged in the outer circular truncated cone cylinder in a sleeved mode, and the bottom end of the outer circular truncated cone cylinder and the bottom end of the inner circular truncated cone cylinder are connected in a sealed mode through an annular groove. A second-stage cylinder is arranged in the first-stage cylinder in a sleeving manner, one end of the second-stage cylinder is connected with the top cover, the other end of the second-stage cylinder is connected with a second-stage circular truncated cone cylinder, the second-stage circular truncated cone cylinder is arranged in the inner circular truncated cone cylinder in a penetrating manner, and the second-stage cylinder is connected with the inner circular truncated cone cylinder; a spiral guide plate is connected in the second-stage cylinder, and a plurality of spiral inlets are formed in the side wall of the second-stage cylinder; the invention solves the problems that the underflow is fine during the grading operation of the cyclone, the grading precision of the single cyclone is insufficient, and the energy loss of the intermediate pipeline of the series cyclone is too much.

A cone or cylindrical tube stack with narrow in-between gap circumferential surface swirling cyclone separator according to the present invention, creating swirling flow by flowing along the convex outer surface of the inner-stacked cone or cylindrical tube. The inner wall of the outer-stacked cone or cylindrical tube, which is a concave surface, serves as the wall for collecting fluid with larger or higher density particles that is opposite to the surface for swirling, which is disposed in accordance with the separation movement of larger or higher density particles that centrifuged from swirling by their inertial force. The distance that the particles travel towards the wall for collecting fluid with larger or higher density particles is short due to the narrow swirling and separating gaps, combined with the flow on the convex curved surface of the cone or cylindrical tube walls which pressure drag is low, this results in higher swirling speeds than those on the concave inner surface of conventional cyclone, significantly increasing the inertial force of particles centrifuged away from the swirling. Consequently, the separation efficiency of the cone or tube stack circumferential surface swirling cyclone separator according to the present invention is much higher than that of conventional cyclone separators. Especially in cases where the cyclone fluid separator according to the present invention is equipped with multi-stage separation, where the final stage utilizes multiple small cyclones, and in configurations where multiple cones are stacked and equipped with device for swirling and counter-flow separation, which convex fluid drainage ridges are installed on the wall for collecting fluid with larger or higher density particles, the ridges curving towards the side that the swirling flow flows to, sloping from the downstream edges of the cones or cylindrical tubes towards the upstream edges of the cones or cylindrical tubes, which counter to the swirling flow along the convex curved surface of the outer circumferential surface of cone or cylindrical tube. When working with a reverse swirling system, enabling to recycle multiple separation within the system before the fluid exits the separator, enabling high separation efficiency for separating various types of fluids mixed into emulsion or separating micron-level dust such as PM 2.5 from the air.

The invention discloses an electric conduction and heat dissipation integrated cable and method. The cable comprises a plurality of wire sub-body structures which are connected in sequence; each wire sub-body structure comprises a high-power conductive section, an insulating heat dissipation section and a microgroove array, the high-power conductive section is a cylindrical pipe body made of heat-conducting and conductive materials, and one end of the high-power conductive section forms a bent section of a right-angle structure through a precise cold bending process; the insulating heat dissipation section is of a cylindrical pipe body structure made of a heat-conducting insulating ceramic material and is seamlessly integrated with the bending section; a microgroove array is etched on the inner wall of the tubular shell of each wire sub-body structure; a nano-silver plating layer is embedded in the microgroove array at the high-power conductive section, and a super-hydrophilic layer is configured in the microgroove array at the insulating heat dissipation section; the insulating phase-change material evaporates in the high-power conductive section and is guided to the insulating heat dissipation section through the bent section to be condensed, continuous capillary pumping force is formed through combination of capillary force and gravity, pump-free self-maintaining circulation is achieved, and the temperature control capacity of the high-power wire under the extreme current density is remarkably improved.

The present invention relates to a method for preparing a valved artificial blood vessel. The valved artificial blood vessel is a tubular fabric with a valve inside, comprising an outer tube and an inner tube connected to each other. The outer tube is a cylindrical tube. When the inner tube is unfolded, it is composed of three identical quasi-rectangular shapes, the quasi-rectangular shapes differing from rectangles only in that the upper and lower edges are curved edges. The upper edges of the three quasi-rectangular shapes are free edges, while the lower edges and straight edges are respectively fixed to the inner wall of the outer tube. First, a pattern image of the valved artificial blood vessel is input into weaving CAD software, and then the design is set according to the fabric density. Then, a process is performed to match each part of the valved artificial blood vessel pattern image with the tissue in a needle organization table, thereby generating a pattern pattern in the weaving CAD software. Finally, the pattern pattern is imported into a loom system of a jacquard loom for integrated weaving to obtain the product. The seamless valved artificial blood vessel of the present invention does not suffer from stress concentration at the suture site, thereby greatly improving tear resistance.

The invention relates to the field of food production equipment, in particular to stirring and pulping equipment for jam processing and a stirring method thereof.The stirring and pulping equipment comprises a pulping barrel and a shaft pipe, the shaft pipe is arranged in the pulping barrel, end covers supporting the shaft pipe to rotate are fixed to the two ends of the pulping barrel, and a crushing cutter is arranged in the middle section of the shaft pipe; and an air inlet assembly communicates with an opening in the outer end of the shaft pipe, a driving piece for supporting the shaft pipe to drive the crushing cutters to rotate is fixed to the outer side of the end cover, and the shaft pipe is of a hollow circular pipe structure. The mounting cover, the side pipe and the cutter body of the crushing cutter form an air passage, air is directly sprayed into materials through air holes densely distributed in the cutter body, a heat transfer path is shorter, jam can be directly contacted, processing heat can be rapidly taken away, and a booster fan structure can be formed without an additional driving part; integrated arrangement of pulping and cooling on the cutter body is achieved, energy consumption is reduced, and the equipment structure is simplified.

The invention relates to the technical field of metal plate machining, in particular to a trapezoidal titanium alloy bar machining method which comprises the following steps of blank preparation, extrusion forming, heat treatment, surface treatment, size finish machining, quality detection and packaging and warehousing. Heat treatment equipment for the trapezoidal titanium alloy bar adopted in the heat treatment process comprises a heating furnace and a placing device, the placing device comprises a cylindrical pipe arranged in the heating furnace, a pushing and extruding mechanism and a plurality of circumferentially-distributed discharging mechanisms are connected to the pipe wall of the cylindrical pipe, and a clamping mechanism is connected to the right end of the cylindrical pipe; the heating furnace is matched with the placing device, so that the whole heat treatment process of the trapezoidal titanium alloy bar can be realized on one device, the moving frequency of the bar is reduced, and the heat treatment efficiency is improved; the problem that in the heat treatment process of an existing trapezoid titanium alloy bar, the heat treatment efficiency is low due to the fact that the existing trapezoid titanium alloy bar needs to be repeatedly clamped through clamping equipment and move in multiple heating equipment with different functions is solved.

According to the stainless steel and titanium alloy welded joint strengthening method based on CFD simulation, a stainless steel component is a cylindrical tube shell, one end of the cylindrical tube shell is completely open, and a through hole is formed in the other end of the cylindrical tube shell; the titanium component is a thin plate, and the thin plate is arranged in the cylindrical tube shell and is fastened by applying pressure; a FLOW-3D simulation platform is adopted, boundary conditions applied to six surfaces of a computational domain are all constant-pressure boundary conditions, and laser power, pulse frequency, defocusing amount, welding speed and material attributes serve as input to predict temporal and spatial changes of temperature, fluid flow and element distribution in a molten pool; and based on the prediction result of the FLOW-3D simulation platform, the nanometer laser is incident from one side of the thin plate at the predicted laser power, pulse frequency, defocusing amount and welding speed, the laser scanning track is a circular path, cooling is conducted to the room temperature after welding is completed, a supersaturated solid solution in a welding seam is reserved, and the situation that intermetallic compounds are separated out again is avoided.

The utility model provides a soil sampling tool which comprises a water insulation cylinder, one end of the water insulation cylinder is hinged with two conical tips capable of forming a conical body structure, the inner walls of the two conical tips are both provided with magnets which attract each other, one end of the water insulation cylinder far away from the conical tips is provided with a round cover, and the round cover is connected with the conical tips. A threaded hole penetrating through the round cover is formed in one side of the round cover, a bobbin used for ejecting the two conical tips is in threaded connection with the interior of the threaded hole, an external thread is machined on the outer surface of the upper end of the bobbin, a sampling barrel used for storing a soil sample is slidably installed in the bobbin, and a guide hole is formed in the side, away from the conical tips, of the bobbin; a guide hole is formed in the cylindrical tube, a hollow tube is inserted in the guide hole, one end, positioned in the cylindrical tube, of the hollow tube is fixedly connected and communicated with the sampling tube, and one end, positioned on the outer side of the cylindrical tube, of the hollow tube is in threaded connection with a sealing cover. The success rate of collecting underwater soil is improved.

A lightbar for an emergency vehicle is provided. The lightbar includes lights and a camera within the same unit. An opaque and hollow cylindrical tube runs from the lens of the camera to an inside surface of the lightbar. The tube prevents IR light that reflects from the inside surface of the lightbar from entering the lens. The tube also prevents IR light and light from LED lights within the lightbar from entering the lens directly. Settings on the camera are set so that image capture is filtered at a frequency of 50 Hz and 60 Hz. By providing such a tube and by filtering out image capture at 50 Hz and 60 Hz, images captured by the camera are greatly improved in quality.

The invention is suitable for the technical field of tapered-straight composite shell ring processing, and provides a processing method of an integrated tapered-straight composite shell ring, which comprises the following steps: S1, cutting and blanking a steel plate according to the size of the tapered-straight composite shell ring, and cutting out a plate material; s2, preparation work before machining is conducted on the plate material, wherein the preparation work at least comprises groove machining, two-side edge pre-bending and generatrix, symmetric center line and step line drawing; s3, according to the drawn step line, pressing forming is conducted on the plate through a top pressing type plate bending machine, and a formed workpiece is of a composite structure of a semi-cylindrical pipe section and a semi-conical pipe section; s4, the formed workpiece is shaped; and S5, the two shaped workpieces are folded and welded, and the conical and straight composite shell ring is formed. Therefore, not only is the specific process problem of the integrated cone-straight composite shell ring in the bending forming process solved, but also the core advantages of no annular weld joint, high continuity and high performance pursued by the integrated design are achieved by guaranteeing the manufacturing precision and consistency of the integrated cone-straight composite shell ring.

The utility model relates to the field of heat shrink tube gluing, and discloses a heat shrink tube gluing device which comprises a gluing table, the top end of the gluing table is fixedly connected with a supporting plate, the outer wall of the supporting plate is provided with a connecting mechanism, the outer wall of the connecting mechanism is respectively provided with a gluing rod and a moving seat, the outer wall of the moving seat is rotatably connected with a rotating disc, and the rotating disc is provided with a rotating shaft. A fixed pipe is fixedly connected to the outer wall of the rotating disc, a limiting plate is elastically connected to the inner wall of the bottom end of the fixed pipe through a reset spring, a guide pipe is fixedly connected to the inner wall of the fixed pipe, a round sleeve is inserted into the outer wall of the fixed pipe, and a cylindrical pipe is fixedly connected to the left end of the round sleeve. According to the utility model, the fixed pipe and the circular sleeve are inserted or separated, and the limiting plate and the inner wall notch of the circular sleeve are inserted or separated, so that cylindrical pipes with different diameters and lengths can be quickly replaced, bolts do not need to be used for twisting and dismounting for multiple times, and the efficiency of replacing the cylindrical pipes is improved to a certain extent.

The utility model discloses highway engineering roadbed compactness detection equipment which comprises a stable mounting plate and a liquid crystal display, the liquid crystal display is located in the middle of the front end of a sand filling cylinder, a valve mounting plate is slidably connected to the interior of a limiting cavity, and a rotating rod is movably connected to the right side of the valve mounting plate. A sand guide groove is welded to the lower portion of the sand filling cylinder, a gravity detector is fixedly connected to the lower portion of the cylindrical pipe, a fixing groove is formed in the stable mounting plate, a fastening column is movably connected to the middle of the upper portion of the stable mounting plate, and the sand filling cylinder is movably connected to the interior of a fastening mounting ring. The limiting pin prevents the stable mounting plate from deviating, the protective base plate on the outer surface of the valve mounting plate is in contact with the limiting cavity to form a closed space, so that sand above the valve mounting plate cannot flow into the sand filling cylinder, the amount of sand flowing out can be automatically controlled by controlling the transmission motor, and the amount of sand in a pit hole can be monitored in real time.

The present invention relates to a heat exchanger (figure 1) in the form of a smooth stainless steel cylindrical tube consisting of three tubes (5-6-7), the invention relating to methods for vaporising water (seawater, pure water, freshwater or wastewater) in order to produce steam (3) by means of a process using concentrated thermodynamic solar power as well as geothermal heat and other forms of heat with cogeneration, and by extension to applications for steam production and for producing hydrogen and oxygen by electrolysis. For its process applications, the heat exchanger is in the form of a cylindrical tube of variable diameter (8-9) according to the amount of water (2) to be vaporised and with a length (8) and width (9) defined and modulated according to the flow parameters of a heat-transfer fluid (1-4) heated by solar energy concentrated in situ. The heat exchanger in the form of a stainless steel cylindrical tube is characterised by its particular capacity for process interaction, which produces a thermal transfer by convection and conduction by the tube (6), i.e. a transfer of heat from one hot body, the heat-transfer fluid, oil (7), to a colder body (5), which is a fluid, the water (2). By means of simple works carried out in the sunlit area, the heat exchanger can be installed on the surface, in the subsoil or in a geothermal well having medium or high enthalpy. Once the heat exchanger in the form of a stainless steel cylindrical tube is installed and adapted, systems of pipes carry the water (2) in the space provided up to the heat-transfer system according to the invention, in order to bring the temperature of the fluid to a value higher than the boiling temperature, for the fluid to then be raised, by the same system of pipes, to the surface in order to be vaporised by being ejected to the outside (3) of the heat exchanger. By virtue of its method of use and functions, the heat exchanger in the form of a stainless steel cylindrical tube is intended for methods for vaporising water (seawater, freshwater and wastewater) by evaporation.

The utility model relates to the technical field of food safety detection, in particular to safety detection equipment for microorganisms in beef, which comprises an operation table, a placement table fixedly mounted on the operation table, a support arm fixedly mounted on the operation table, and a detection instrument fixedly mounted on the support arm. A U-shaped moving frame is slidably installed on the operating table through a sliding assembly, a cylindrical pipe is fixedly installed on the side face of the moving frame, the two ends of the cylindrical pipe are sealed, a plurality of liquid outlet pipes are fixedly connected to the cylindrical pipe, and a liquid inlet pipe is fixedly connected to the cylindrical pipe. A strip-shaped rod is mounted on the side, away from the cylindrical pipe, of the moving frame through a mounting assembly, a rubber scraping strip is fixedly mounted on the lower surface of the strip-shaped rod, and the lower side of the rubber scraping strip is in sliding contact with the containing table. The surface of the placing table is disinfected, so that residual microorganisms on the placing table are prevented from influencing the detection of the next beef, and the accuracy of a detection result is ensured.

An adjustable Aerolift leg comprising an outer tube, an inner tube, a lock mechanism and an adjustment rail. The inner tube may slidably fit into the outer tube. The inner tube and outer tube may be a square shape, a triangular shape, a circular shape or an eye shape. The shape of the inner tube may or may not depend on the shape of the outer tube. The lock mechanism may be located at an end of the inner tube, between the outer tube and the inner tube. The lock mechanism may lock relative movements therebetween. The adjustment rail may be disposed inside the inner cylindrical tube which may be inside the outer cylinder. The adjustment rail may receive the lock mechanism at one of several positions.

A flute formed by a carbon fiber composite material belongs to tubular musical instruments and is provided with a cylindrical tube body, the tube body is provided with holes, the cylindrical tube body is composed of a fiber cloth inner layer, a fiber-reinforced main body layer, a fiber cloth outer layer and a surface paint layer from inside to outside in sequence, the fiber cloth inner layer and the fiber cloth outer layer are made of 3K and 330g / m < 2 > twill-woven carbon fiber prepreg cloth, and the surface paint layer is made of a surface paint layer. The fiber-reinforced main body layer is a prepreg formed by mixing fibers and resin according to a set proportion, the fibers are carbon fibers, the resin is epoxy resin, the weight ratio of the carbon fibers to the epoxy resin is 50-70: 50-30, and the length-diameter ratio of the cylindrical tube body is (30-45): 1. The raw materials are easy to obtain, the production efficiency is improved, the finished product has higher stability and durability, and constancy of the shape and the tone quality in long-term use is ensured.

An attachment for a mobile construction machine, in particular a wheel loader, for transporting and changing the position of drilling tools and drill pipes, comprising a base plate (1), a cylindrical, open pipe (2) arranged vertically on the base plate and connected thereto for receiving a drilling tool (3) or drill pipe, and a connecting device (6, 7) for connecting the attachment to a mobile construction machine, wherein - the cylindrical tube (2) is connected to the base plate (1) at one of the two tube ends, so that the latter partially or completely closes the tube end, and the opposite tube end is open, - the inner diameter (d) of the cylindrical tube (2) is selected so that the drilling tool (3) or drill pipe can be inserted through the open pipe end, - the cylindrical tube (2) has a slot (5) extending in its longitudinal direction, the width (b) of which is smaller than the diameter of the drilling tool (3) or drill pipe, - the connecting device (6, 7) is arranged on the side of the pipe circumference opposite the slot and is connected to the pipe (2) and / or the base plate (1).

To provide a fluid pressure actuator which achieves reduction of positional deviation of a restraining member caused by force acting thereon.SOLUTION: A fluid pressure actuator 20 includes: a cylindrical tube 24; a sleeve 26 which covers the outer peripheral surface of the tube 24 and expands the tube in a radial direction by expansion of the tube while limiting extension of the tube in an axial direction; a pair of sealing members 32 each of which is provided with an insertion part 32B, having a taper part 49 in which a diameter is reduced toward the depth side of insertion, and seals a tube end; a restraining member 28 which is provided ranging from one side of the pair of the sealing members 32 to the other, includes restraining ends 29 which are disposed inclining along the taper parts 49, and may deform in an intersection direction intersecting the axial direction against compression along the axial direction; and a fixing member 36 which fixes the sleeve 26 and the restraining member 28 to the insertion parts 32B from the outer side of the sleeve 26 at positions corresponding to the restraining ends 29 of the restraining member 28.SELECTED DRAWING: Figure 4

The invention relates to the technical field of medical assistance, in particular to a self-heating infusion system which comprises a controller and an infusion tube heating sleeve, the infusion tube heating sleeve comprises a vertical hinge column, a pair of half sleeves are rotatably mounted on the vertical hinge column, each half sleeve is of a semi-cylindrical structure, and the inner side of each half sleeve is provided with a half tube groove of a semi-cylindrical structure; the half sleeves on the two sides are combined to form a cylindrical structure, a cylindrical pipe groove is formed in the center of the cylindrical structure, electric heating pieces are arranged on the surfaces of the half pipe grooves on the two sides, a temperature sensor is arranged at the bottom of the half pipe groove on one side, and the temperature sensor and the electric heating pieces are electrically connected with a controller through wires. A display screen, a power switch, a temperature setting button and a time setting button are arranged on the front face of the controller. The problems that a traditional infusion heating mode is inaccurate in temperature and depends on manpower are effectively solved, and infusion safety and medical care efficiency are remarkably improved.

The invention relates to a nuclear main pump lead-bismuth lubrication guide bearing structure for negative feedback regulation, and belongs to the technical field of systems of nuclear energy, high-temperature industry, energy and chemical industry, scientific research and the like. The bearing structure is internally provided with an even number of cylindrical pipelines and spiral pipelines which are circumferentially arranged, the inner wall of the bearing structure is sequentially provided with a feedback cavity, a high-pressure liquid tank, a liquid return tank and a working cavity in the axial direction, and the two ends of the spiral pipelines are connected with the feedback cavity and the working cavity respectively. The bearing capacity of the lead-bismuth lubrication guide bearing of the nuclear main pump is improved, the leakage problem is solved, and the lead-bismuth lubrication guide bearing is suitable for aerospace vehicle propulsion systems, ocean engineering deep sea equipment and the like.

The utility model relates to the technical field of purification equipment, and particularly discloses an ecological floating bed type water body purification device which comprises a square plate, a hole is formed in the square plate and is fixedly connected with a one-way barrel in a communicating manner; the emergent aquatic plants are planted in the one-way barrels, then the root systems of the emergent aquatic plants penetrate through the bottom face holes to make direct contact with the water body to purify the water body, then the connecting shafts penetrate through the semi-cylindrical pipes to complete movable connection, then the emergent aquatic plants are placed in the water body, and when shaking along with water waves, the one-way barrels extrude one another to be limited; the one-way barrel is arranged, so that the left-right shaking of the one-way barrel is limited, emergent aquatic plants planted in the one-way barrel can reduce loss of root systems caused by shaking, meanwhile, the freedom degree of the one-way barrel in one direction is limited, waves can be resisted, and water plants can purify COD, nitrogen and phosphorus in water in a relatively stable water environment; the problems that an existing ecological floating island cannot buffer emergent aquatic plants to reduce shaking, and multiple combined fixing modes cannot be achieved are solved.

The present invention provides a wind valve, comprising a cylindrical tube with an interlayer and an arc slide, wherein at least one end of the cylindrical tube is open; a ventilation hole is provided on the side wall of the cylindrical tube; the arc slide is arranged in the interlayer of the cylindrical tube, and the arc slide can close or open the ventilation hole under the drive of a driving device.

The present invention relates to a sample collector 10 for heat treatment of mineral material, wherein the sample collector 10 has a cylindrical tube 30, wherein the tube 30 is designed to pass through a wall of a heat treatment device, wherein a sample container 40 is arranged in the cylindrical tube 30 and is movable in the longitudinal direction of the tube 30, wherein the sample container 40 has, at least on the side facing the outside, a circular cross section 42 perpendicular to the axis of the tube 30 and closes the tube 30, wherein the sample container 40 is connected to a rod element 50 arranged in the longitudinal direction of the tube 30, wherein the rod element 50 is designed to move the sample container 40, wherein the tube 30 has, in the outer region, a connector piece 60 arranged on the underside, wherein the connector piece 60 can receive a laboratory sample container 70 or can be connected thereto, wherein the sample container 40, in a first rotation position and arranged above the connector piece 60, is designed to close the connector piece 60, and wherein the sample container 40, in a second rotation position, which is rotated 180° about the longitudinal axis of the tube 30 with respect to the first rotation position, and arranged above the connector piece 60, is designed to empty into the connector piece 60.

The invention discloses a building intelligence-based flying dust monitoring device for a construction site, and relates to the technical field of environment monitoring. Comprising a box body, a second cylinder is arranged on the box body, a first cylinder is arranged above the second cylinder, a mounting plate is rotationally arranged in a first rectangular plate on the first cylinder, and a flying dust monitor body is mounted on the mounting plate; a screw rod is arranged in the first cylinder and the second cylinder, a second gear is arranged at the bottom of the screw rod, and a threaded sleeve is fixedly connected into the first cylinder. A hollow shaft is rotationally arranged in a cylindrical hole in the lead screw, a connecting shaft is slidably arranged in the hollow shaft, and a first gear is arranged at the bottom of the hollow shaft; a transmission assembly is arranged on the electric push rod in the box body; according to the invention, the transmission assembly is firstly engaged with the gear 2, so that the height of the raise dust monitor body can be conveniently adjusted, and dust in air at different heights can be conveniently monitored; and then the dust is engaged with the gear I, so that rotation for monitoring the dust is facilitated, wind can be conveniently blown into the dust monitor body, and the dust in the air can be conveniently monitored.

The utility model discloses an extrusion die core capable of quickly switching small specifications, which comprises a common die sleeve, an outer shielding die sleeve sleeved on the outer conical surface of the common die sleeve, a middle die sleeved on the inner conical surface of the common die sleeve, an inner die core sleeved on the inner conical surface of the middle die, a small die core sleeved on the inner conical surface of the inner die core, a cylindrical tube arranged at one end of the small die core, and a cylindrical tube arranged at the other end of the small die core. According to the utility model, before a small-specification conductor is replaced through a large-specification conductor, the small mold core is sleeved on the end part of the small-specification conductor, and along the wiring direction of the conductor, the cylindrical tube of the small mold core is in the front and the cone is in the back, so that the small-specification conductor is not required to be replaced, and the insulation shielding cavity is reserved between the outer conical surface of the common mold sleeve and the inner conical surface of the outer shielding mold sleeve. The small die core enters the inner die core of the large-specification insulated wire core and is combined with the inner die core of the large-specification insulated wire core, so that the production of the small-specification three-layer co-extrusion insulated wire core can be quickly switched without shutdown, the time for replacing the specification of a conductor and the die replacement time are shortened, the cost is reduced, and the reliability of an extrusion layer is improved.

The invention discloses a constant-resistance energy-absorbing anchor cable and an application method thereof. The constant-resistance energy-absorbing anchor cable comprises an anchor cable body, a tray, a shrinkage sleeve, a yielding pipe and a lock. One end of the anchor cable is anchored in the rock mass, and the other end of the anchor cable penetrates through the yielding pipe and is fixed with the lock; the tray abuts against the rock wall. And the inner end of the shrinkage sleeve penetrates through the tray and is arranged in the rock mass. The yielding pipe comprises a cylindrical pipe section, and the yielding pipe shrinks and deforms in the shrinkage sleeve in the radial direction. A spiral structure is arranged on the outer wall of the cylindrical pipe section, the spiral direction of the spiral structure is opposite to that of the anchor cable, and the spiral structure and the anchor cable form a bidirectional torque balance structure. The rear end of the cylindrical pipe section abuts against the lock. The spiral structure is arranged on the yielding pipe, the yielding pipe generates torsion opposite to the anchor cable in the extrusion deformation process in the shrinkage sleeve, the opposite twisting directions of the yielding pipe and the anchor cable can counteract rotation torque, and stable extrusion deformation of the yielding pipe in the shrinkage sleeve is achieved.

The utility model relates to the technical field of instrument supports, and discloses a fixing device convenient to install an automatic control instrument, which comprises a cylindrical tube, sliding chutes are arranged on two sides of the cylindrical tube, a cylindrical groove is arranged at the top of one side of the cylindrical tube, and a threaded rod is movably connected to the bottom of the inner side of the cylindrical tube. The outer side of the upper thread is movably sleeved with an upper moving ring, the outer side of the lower thread is movably sleeved with a lower moving ring, the bottom of the outer side of the threaded rod is fixedly sleeved with a driven gear, the other side of the rotating rod is fixedly connected with a driving gear, the top of the lower moving rod is fixedly connected with a lower fixing ring, and the bottom of the upper moving rod is fixedly connected with an upper fixing ring. According to the utility model, the controllable clamping device is arranged, so that the opening and closing of the fixing ring can be controlled by rotating the handle when the instrument is mounted and dismounted, the operation is very convenient and rapid, the instrument cannot be damaged, and the dismounted fixing ring can be replaced with fixing rings matched with different types of instruments.

The invention discloses a bearing balance block grinding tool and method, and belongs to the technical field of bearing balance block machining. The technical problems that in the horizontal grinding machining process of an existing balance block with the contact face being an arc spherical face, due to the fact that the balance block cannot serve as an alignment reference, deviation is prone to occurring in the machining process, and the machining precision is insufficient are solved. The base comprises a plurality of first bosses evenly distributed in the horizontal circumferential direction, the abrasive paper is pasted to the top faces of the first bosses, the clamping block is in a cylindrical pipe shape, a conical hole is formed in the lower portion of the inner wall of the clamping block, four sets of positioning grooves are evenly formed in the upper end of the clamping block in the circumferential direction, and each set of positioning grooves is provided with two adjacent notches. A compression spring is sleeved on a second boss in the middle of the positioning groove, the upper portion of the rotating shaft is cylindrical, four groups of double-fork type positioning teeth are evenly arranged at the bottom of the rotating shaft in the circumferential direction, and the positioning teeth are installed in a notch of the positioning groove in a sliding mode in the vertical direction. And the machining precision is improved. The grinding device is used for grinding the balance block for the bearing.