624 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.

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.

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 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.

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 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 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.

A modular frame assembly for constructing a building frame includes a deck assembly having longitudinal frame members covered by a metal deck and at least two vertical support members rotatably coupled to the deck assembly. Vertical support members have flanges and an intervening web or may alternatively be formed from hollow square or round cylindrical tubes. Vertical support members may be rotatably coupled to flat sides of the longitudinal frame members or may alternately be coupled to the ends of the longitudinal frame members by intervening vertical support member connectors. Vertical support members may be rotated to fold the frame assembly for transport and unfolded and affixed to longitudinal frame members to form part of a building frame. Some embodiments include more than one frame assembly affixed along their sides to one another and / or stacked one atop the other.

Milling tool (1) for face milling the end face of a pipe end, comprising one or more cutting edges (2) which extend in a cutting plane perpendicular to a designated axis of rotation (R) of the milling tool (1), wherein a guide body (3) projects from the cutting edge(s) (2) at the center of the milling tool (1) perpendicular to the cutting plane, the outer contour of which is designed such that the guide body (3) can be inserted into a cylindrical pipe with a circular cross-section of a certain diameter to be machined with the milling tool (1) and thereby aligns the milling tool (1) with respect to the pipe such that the axis of rotation (R) of the milling tool (1) coincides substantially with a central longitudinal axis of the pipe. wherein the milling tool (1) has a base body (5) for driving the cutting edges (2), which carries a cutting edge body (6) which is in particular replaceable and provides the cutting edges (2), wherein the base body (5) additionally carries the guide body (3), and wherein the base body (5) passes through the cutting body (6) and the guide body (3).

The utility model relates to the technical field of wind power equipment component welding and clamping devices, in particular to a wind power equipment component welding and clamping device with a protective structure, which comprises a bottom plate, two supports and a working plate, the two supports are symmetrically arranged on the upper surface of the bottom plate, the working plate is fixedly mounted on the upper surface of the bottom plate, and the protective structure is arranged on the working plate. Symmetrical first sliding ways are formed in the upper surface of the bottom plate, two moving tables are slidably connected into the first sliding ways, a placing mechanism is arranged above the moving tables, and the placing mechanism comprises a lifting table, a telescopic assembly and first rolling wheels. The device has the beneficial effects that a screw penetrates through the bottom wall of a third slide way and extends into a first threaded hole to be in threaded connection with the first threaded hole to fix a telescopic rod, so that the telescopic rod can drive a first roller to stretch out and draw back left and right, and therefore, even if half cylinders are different in size, the device can be used for clamping before welding.

The utility model discloses a sewage pretreatment device, which belongs to the technical field of sewage treatment and comprises a barrel, a feeding pipe and a charging barrel are respectively mounted at the top of the barrel, the charging barrel is positioned in the center of the top of the barrel, a cylinder is rotatably connected to the bottom of the barrel and penetrates into the barrel, and the feeding pipe is communicated with the charging barrel. A plurality of groups of stirring blades I are uniformly mounted on the outer part of the cylinder positioned in the barrel body, and through the interaction of the linkage assembly, the transmission rod, the stirring blades II, the round pipe, the stirring blades I and other assemblies, the stirring blades I uniformly stir the medicament and the sewage at the bottom of the barrel body; a stirring blade II can stir the medicament in the charging barrel to keep uniformity, so that the medicament can be better fused after being in contact with sewage in the later stage, and meanwhile, a linkage assembly is arranged to enable a circular pipe and a disc to rotate reversely, so that the falling direction of the medicament and the sewage is opposite to the stirring direction of the stirring blade I; therefore, the medicament and the sewage are mixed more sufficiently, and the purification efficiency is improved.

This utility model discloses a top-holding device for a milling machine tool, relating to the field of milling machine tool technology. It includes a support column, one end of which is equipped with an adjustable clamping assembly. A guide frame moves within an adjustment groove to adjust the height of the ejector cylinder. The guide frame guides the use of the reinforcing column. Two limiting plates limit the use of two trapezoidal top pins. Two telescopic springs buffer the movement of the two trapezoidal top pins within the ejector cylinder. A first trapezoidal cylindrical tube and a second trapezoidal cylindrical tube contact the two trapezoidal top pins, enabling the two top pins to move up and down with the ejector cylinder while being limited and clamped to their outer wall. A connecting cylinder uses a limiting seat to limit and support a limiting ring. A fixed seat uses a fixing block to fix the adjustable clamping frame. The adjustable clamping frame clamps and guides the components within the limiting ring.

The utility model belongs to the technical field of expansion studs, and particularly relates to a welding type cylindrical head stud which comprises a screw, a nut is rotationally connected to the circumferential face of the screw, a gasket is rotationally connected to the circumferential face of the screw, and an expansion device is arranged on the outer surface of the screw. The expansion device comprises a round pipe, the round pipe is arranged on the outer circumferential face of the screw, a sliding groove is formed in the inner wall of the round pipe, and the inner wall of the sliding groove is fixedly connected with one end of a spring. Through the arrangement of the expansion device, the connecting plate is opened to complete expansion of the bolt, the stud is applied to wider fields, the bolt can be conveniently fixed to a wall through the application of the conical column, meanwhile, the use performance of the stud is improved, subsequent use of the stud is facilitated, and the stud is convenient to use. The problems that a connecting plate cannot be opened to complete expansion of a screw, so that the screw cannot be fixed in an internal hole of a wall, and the screw is prone to loosening are solved.

This utility model discloses an incense burner with a cylindrical tube. The bottom of the cylindrical tube has a threaded base plate, and the top has a threaded incense insert. Several ventilation holes are arranged around the cylindrical tube. The incense insert has a through-hole, pressable incense tube that passes through a cavity inside the incense insert. The incense tube has a ring of several incense beads that press against the conical surface at the top of the cavity. A fixed handle is located at the top of the incense tube, and a hanging ring is located at the top of the handle. There are three incense beads that can slide through the wall of the incense tube. The advantages of this utility model are: the incense is lit at the bottom and inserted into the cylindrical tube; the ventilation holes allow for air circulation and fragrance dispersal; the ash falls into the cylindrical tube; and the ash can be poured out by opening the threaded base plate. When used indoors, the ash is automatically collected to prevent scattering; when used outdoors, the cylindrical tube covers the incense to prevent it from being blown out by the wind.

The utility model relates to the technical field of stirring devices, and discloses a stirring device for resin film production, which is good in mixing effect and comprises a device main body, the device main body comprises a device shell, the bottom of the device shell is fixedly connected with a bottom conical frame, and the middle of the bottom of the bottom conical frame is fixedly connected with a discharge pipe. The middle of the top of the device shell is movably sleeved with a rotating pipe, the inner side of the rotating pipe is movably sleeved with a rotating rod, a fixing hole is formed in the front face of the rotating rod, the outer side of the rotating rod is movably sleeved with a fixing assembly, the fixing assembly comprises a cylindrical pipe, and the two sides of the cylindrical pipe are both fixedly connected with second stirring rods. Through the arrangement of the fixing assembly, after the required height is adjusted, the handle block is released, and the cylindrical rod is inserted into the inner side of the fixing hole to fix the position of the fixing assembly under the elastic force action of the spring, so that the stirring quantity of the second stirring rod is increased, and the mixing effect is improved.

The utility model discloses a motor train unit side door lower swing arm roller replacing device which comprises a connecting sleeve, a first connecting block and a second connecting block, the connecting sleeve is arranged to be of a cylindrical barrel-shaped structure, the first connecting block and the second connecting block are arranged at the two ends of the connecting sleeve respectively, a connecting groove is formed in the first connecting block, and the second connecting block is arranged in the connecting groove. A connecting hole is formed in the second connecting block, the connecting sleeve and the connecting hole are coaxially arranged, and the extension line of the connecting groove perpendicularly intersects with the axis of the connecting sleeve; through the arrangement of the connecting sleeve, the connecting groove and the connecting hole, the rolling shaft of the lower swing arm roller of the door is connected with the connecting groove in a matched mode, the wrench is connected with the connecting hole in a matched mode, the axis of the rolling shaft is consistent with the connecting sleeve, and therefore the lower swing arm roller of the door is disassembled through the wrench. The connecting grooves are matched with the corresponding rolling shafts, so that different conventional wrenches can be used for disassembly, and meanwhile, conventional wrenches with different lengths can be replaced based on actual conditions to adjust the torque so as to ensure effective disassembly.