195 results about "Frustum" patented technology

The invention discloses a high-precision point iridium welding device and process, and relates to the technical field of pen point welding. The device comprises a conveying assembly capable of moving along an annular path, a welding assembly arranged below the conveying path and positioning tools arranged corresponding to conveying blocks. The conveying assembly comprises a plurality of conveying blocks, and the positioning tool is used for inserting a to-be-welded pen point base material; the welding assembly comprises a hopper, a feeding pipe coaxially connected with the hopper in a sliding mode, an electrode ring fixed to the top end of the feeding pipe and an inverted-cone-frustum-shaped iridium particle groove formed in the top end. The hopper can be filled with iridium particles to be welded, the feeding pipe can ascend and descend in the vertical direction, and the iridium particle groove can bear one iridium particle. Through cooperation of the conveying block and the positioning tool, quick assembly and feeding of the pen point base material are facilitated, the feeding difficulty is reduced, and manual feeding is more labor-saving.

The invention provides a pile pressing device and an operation method thereof. The pile pressing device comprises driving equipment, a clamp and a pile pressing assembly. The pile pressing assembly is connected with the tail end of the arm frame through a clamp. The clamp adaptive end is in clamping connection with the clamp; a profile steel framework is arranged in the fixture adaptive end; the tip end of the pressing pile is in an inverted cone frustum shape. Pile pressing force is directly applied from the interior of a pile core, clamping damage of a traditional clamp to the outer side of a pile body is thoroughly avoided, and the technical effects that the problem that the surface of the exposed pile body is damaged is solved, the integrity and attractiveness of the exposed face of the wall protection pile are guaranteed, and the cost caused by later appearance repairing is eliminated are achieved.

This invention discloses a frustum-shaped chill for the firing surface of cylinder heads in sand casting, belonging to the technical field of casting process auxiliary parts. The chill includes a chill body with multiple circular bosses evenly distributed along the radial direction on its top surface for precise positioning within the sand mold. The top surface of the body has crisscrossing venting grooves to expel gases generated during the solidification of the sand core and molten metal. The body is divided into upper and lower frustum sections, with the upper frustum being higher than the lower frustum, forming a gradient cooling structure. Through structural optimization, this invention achieves precise and controllable cooling of the cylinder head firing surface, reducing defects such as shrinkage porosity, looseness, and gas porosity to near zero, improving casting density and yield, and is suitable for sand casting production of various aluminum engine cylinder heads.

The utility model discloses a waterproof high performance european cable joint, and its stress cone subassembly includes upper body and lower body, and the upper body bottom array has a plurality of arc clamping pieces, and each arc clamping piece constitutes a frustum, and the lower body top has the taper hole corresponding frustum, and the shell bottom still has a bottom cover with a hole and is screwed, and the lower body is inserted in the upper body bottom, and the frustum of each arc clamping piece constitutes and is inserted in the taper hole, and the bottom cover presses the lower body and goes up and makes each arc clamping piece clamp the cable, and the junction of upper body and lower body still is equipped with first seal, and the bottom cover still is equipped with second seal, and the second seal lower extreme still has a ring of sealing ring, and the sealing ring is hooped between the cable and the hole inner wall of bottom cover, and the utility model discloses convenient assembly, and the cable is not easy and is produced with the joint loose, and the waterproof property is good.

The utility model discloses a multi-size sealing ring installation tool. The multi-size sealing ring installation tool comprises a main device body, a claw part assembly and an adjusting assembly. First and second air inlets are formed in the outer side wall of the main body; the claw part assembly comprises expanding claws and lifting claws which are distributed along the circumference at intervals, the expanding claws move in the radial direction, the ends of the expanding claws are provided with protrusions with supporting parts and supporting parts, the expanding claws are folded at the beginning to enable the protrusions to be gathered into a cylinder to be sleeved with the sealing ring, the expanding claws expand to open the sealing ring after air inflow, and the lifting claws eject the sealing ring out of the sealing ring to be clamped into a workpiece mounting groove; the adjusting assembly comprises an adjusting screw rod and a circular truncated cone, two ends of the screw rod are connected with a first knob and the circular truncated cone, a cylindrical ring body with an adjusting screw rod is arranged on the circular truncated cone to position a workpiece, and the air inlet is provided with an air inlet valve with an air adjusting valve. The tool solves the problems that a traditional tool is low in adjustment efficiency, installation deviation exists and a sealing ring is prone to being damaged through cooperation of the air-driven claw part, the adjustable expanding claw structure and the precise positioning assembly, and the multi-size adaptability, the installation efficiency and the sealing quality are improved.

The utility model discloses a quick-release threaded pipe, belongs to the technical field of pipeline structures, and provides a threaded pipe which can be directly and quickly disassembled and assembled without using tools, and comprises a splicing pipe and a push-pull handle, the main body part of the splicing pipe is a main pipe body, the middle part of the main pipe body is provided with an outer convex conical ring, and the end part of the main pipe body is provided with a connecting end; external threads are arranged on the outer side face of the connecting end, the two push-pull handles are fixedly connected through the connecting piece, the outer convex conical ring is located between the two push-pull handles and provided with a pair of symmetrical circular truncated cones, the axes of the two circular truncated cones are collinear with the axis of the main pipe body, each push-pull handle comprises a force application disc, and the inner wall of each force application disc is provided with an inner concave conical surface. The push-pull handle structure for rotation constraint is designed in the middle of the splicing pipe with the threaded structures at the two ends, and when the threaded pipe is disassembled and assembled, component force in the tangential direction of the spiral line is provided, so that operation can be achieved without using a wrench tool, the disassembly and assembly operation is simplified, and the disassembly and assembly efficiency is improved.

This utility model provides a measuring tool for detecting the runout of the outer circle of a UF outer star wheel relative to the inner arc track. It includes a base plate and a rotating structure, a clamping and fixing structure, and a measuring structure mounted on the base plate. The rotating structure includes a bearing seat and a rotating shaft. The bearing seat is fixed to the base plate and contains a bearing. The rotating shaft is located in the bearing and rotates relative to the bearing seat. The clamping and fixing structure includes an outer cylinder and a pull bolt. An inner cylinder is located at the top of the outer cylinder, and a reference ring is fitted around the top of the inner cylinder. Multiple rectangular grooves are spaced circumferentially on the top of the reference ring, and steel balls are movably placed in these grooves. The pull bolt includes a top clamping part and a bottom connecting part. The clamping part is in the shape of an inverted frustum, and its outer wall abuts against the steel ball. The connecting part connects to a drive assembly, which drives the pull bolt to move up and down. The measuring structure includes a dial indicator, which is fixed to the upper end of a vertical rod via a cantilever. The vertical rod is located on one side of the bearing seat.

The present application provides a kind of inside flanging forming device of jacket through hole, belong to pressure vessel processing technical field.It solves the problem of existing technology when processing jacket through hole inside flanging, processing is troublesome, the problem of insufficient forming quality.The inside flanging forming device of jacket through hole, including cylinder body, forming die head and vertically arranged pull rod, forming die head is conical frustum and has the guide hole one along its axis through, the large end of forming die head is downward and fixedly connected in the upper end of cylinder body, the lower end of pull rod is slidably connected in cylinder body and pull rod can be relatively cylinder body axial telescopic under the action of hydraulic drive, pull rod is up and out of forming die head through the guide hole one, the upper end of pull rod can be detachably sleeved with the push seat that can be synchronous with pull rod and move down, the bottom of this push seat has the push part of circular tube shape and is concentrically arranged with forming die head.The present application makes jacket through hole can be smoothly and smoothly completed flanging forming, effectively guarantees the forming precision and forming quality of inside flanging.

This invention discloses a mixing and stirring device for phosphogypsum production, comprising a mixing cylinder, a fixed outer cylinder, a discharge drive motor, and a docking socket. The outer surface of the middle part of the mixing cylinder is rotatably connected to the fixed outer cylinder, which is coaxially arranged outside, via bearings. The tail end of the mixing cylinder is fixedly connected to a plug connector via bolts. The plug connector has a frustum-shaped body with a larger diameter end connected to the mixing cylinder. The head end of the mixing cylinder is recessed to form an inlet and outlet. Spiral blades are welded to the inner wall of the mixing cylinder. This invention enables continuous phosphogypsum mixing production. The separable structure of the mixing cylinder and the power source allows the motor to operate without stopping. The counterweight design stores energy to ensure that the rotating docking socket has high rotational inertia, enabling rapid rotational mixing after docking with the mixing cylinder.

A method of treating an end section of a conductor is described. The method comprises providing a radially directed compressive force onto the conductor, (10) where a cone sleeve (1) with a conical frustum shaped inner surface is applied to surround the conductor (10), a collet (11) with a conical frustum shaped outer surface is applied to surround the conductor (10) between the cone sleeve (1) and the conductor (10) end and an axially directed force to pull and / or push the cone sleeve (1) at least partially onto the collet (11) is provided to provide the radially directed compressive force onto the conductor (10). Also, a method for joining two end sections of conductors (10) is described.

The powder-liquid mixing bin comprises a tank body provided with an annular partition bin and a first liquid inlet, the annular partition bin comprises an outer peripheral wall and a conical inner peripheral wall which are sleeved with each other, the first liquid inlet is formed in the outer peripheral wall, and a discharging opening is formed in the middle of the upper side of the conical inner peripheral wall and is higher than the upper end face of the conical inner peripheral wall; an outlet is formed in the lower end of the conical inner peripheral wall and connected with a top inlet of a tee joint, an axial inlet of the tee joint serves as a second liquid inlet, and an axial outlet of the tee joint is used for being connected with a mixing pump; liquid entering from the first liquid inlet fills the annular gap between the outer peripheral wall and the conical inner peripheral wall and overflows into the conical inner peripheral wall through the upper end face of the conical inner peripheral wall, so that a circular-truncated-cone-shaped concave part is formed, and powder falls into the circular-truncated-cone-shaped concave part to form a primary mixture; liquid enters the second liquid inlet to take away the primary mixture and convey the primary mixture outwards; the powder-liquid mixing bin achieves the purpose of mixing and is beneficial to mixing and miniaturization at the same time.

The utility model provides a spiral corn milling cutter. The spiral corn milling cutter comprises a cutter body similar to a circular truncated cone shape or an inverted cone shape, a plurality of arc-shaped edge blades and a plurality of linear edge blades, at least two layers of arc-edge blades are arranged on the side face of the cutter body close to the lower end face from bottom to top, and each layer is arranged in the circumferential direction; the multiple linear-edge blades are arranged on the side face of the cutter body in a climbing mode along multiple spiral lines in the axial direction. The arc-shaped edge blade and the linear edge blade are respectively provided with at least one arc-shaped cutting edge, and one linear cutting edge protrudes outwards relative to the side face of the cutter body. The utility model aims to solve the problem that the spiral corn milling mode is single.

The invention relates to an inlet section rectification structure for improving intake airflow organization, which comprises an inlet section airflow expansion structure, a rectifier combined with a conical ring and a grating net, and is suitable for flow control mechanisms such as boilers, wind tunnels and the like. The inlet section airflow expansion structure is from narrow to wide, can slow down high-speed airflow in the pipeline and is connected with the pipeline and the boiler; the rectifier comprises an upstream rectifying cone and a downstream rectifying ring, the rectifying cone plays a role in scattering and decelerating the high-speed jet flow, and the rectifying ring is composed of multiple stages of hollow frustum structures with gradually increased diameters and is used for guiding airflow to be uniformly diffused and increasing the airflow uniformity; the grating net further reduces the vortex and adjusts the airflow direction. On one hand, by guiding airflow diffusion, the structure effectively reduces vortexes and flowing dead zones, improves the uniformity of a flow field, and enhances heat exchange and reaction efficiency; and on the other hand, high-speed gas in the pipeline is converted into low-speed gas uniformly distributed in the reactor by the structure, so that the damage of convection impact to subsequent devices is reduced, the influence of carbon deposition and the like is reduced, and the reliability and the working performance of equipment are improved.

To facilitate the construction and removal of a space structure.SOLUTION: A spatial structure 7 constituting a high evacuation space is constructed by placing a foundation block 1 provided with a plurality of frustum-shaped through-holes 11 penetrating from an upper surface 14 to a lower surface 15 on a surface of a leveled ground 6, and closing the through-holes 11 of the foundation block 1 with a lower surface 211 of a bottom slab 21 of a box culvert 2 placed on the upper surface 14 of the foundation block 1 in a state where crushed stones 4 are charged into each of the through-holes 11 of the foundation block 1.SELECTED DRAWING: Figure 6

The utility model relates to the technical field of gear shaping machines, and provides a gear shaping machine locking mechanism which comprises a bottom plate, a circular truncated cone is movably connected to the center of the top of the bottom plate, a supporting column is fixedly connected to the top of the circular truncated cone, and a rotating plate is fixedly connected to the top of the supporting column. According to the utility model, firstly, a workpiece to be processed is placed between the two clamps, then the two clamps are used for clamping the workpiece, and then the controller is used for starting the main shaft assembly, so that the main shaft assembly drives the cutting tool body to cut the workpiece; a worker reversely rotates a hand rocker firstly, the hand rocker drives a screw rod to rotate reversely, a moving plate gradually moves vertically downwards along the screw rod through continuous reverse rotation of the screw rod, at the moment, movement of the moving plate is limited through two square grooves, and therefore a workpiece can be better locked, the workpiece is prevented from rotating disorderly in the cutting process, and the work efficiency is improved. And the cutting efficiency of the locking mechanism of the gear shaping machine is improved.

The invention relates to the technical field of casting, in particular to a high-pressure molding high-exothermic riser with a fixing mechanism, which comprises a shell layer, a thermal insulation layer and a first heat agent bag, the shell layer is of an inverted-truncated-cone-shaped hollow structure, and openings are formed in the upper end and the lower end of the shell layer. The heat preservation layer is located on the inner wall of the shell layer. An isolation pipe is arranged at the top end of the shell layer; the upper end of the isolation pipe is fixedly connected with the shell layer, the upper end of the isolation pipe and an opening in the upper end of the shell layer are located at the concentric position, and a circulation opening is formed in the upper side of the isolation pipe; a gap is reserved between the lower end of the isolation pipe and the shell layer, so that molten metal can flow through the gap; by arranging the isolation pipe, molten metal circulates in the shell layer and interacts with buoyancy of the slag, the effect of accelerating upward movement of the slag can be achieved, and therefore the situation that the upward floating speed of the slag is low, and the slag is supplemented into a casting along with the molten metal in the shell layer is reduced.

The utility model provides a fixator and a pair of cross-country ski shoes comprising the same, relates to the technical field of ski shoes, and solves the technical problems that the ski fixator needs to be manually locked or released, is inconvenient to use and is unstable in operation during unlocking. The fixator comprises a pedal, a lock rod part, a supporting piece, a fixing hook, a reset spring and a release piece. A stick inserting groove is formed in the side, away from the rotating shaft, of the top of the releasing piece and is of an inverted frustum-shaped structure or an inverted half-pace-shaped structure. According to the snowshoe, the snowshoe can be loosened by inserting the head of a snowstick into the snowstick inserting groove, stooping operation is not needed, the snowstick inserting groove is arranged to be of an inverted frustum-shaped or inverted half-pace-shaped structure, guiding during insertion of the snowstick is facilitated, and unlocking failure caused by inclined insertion is prevented.

This invention relates to the field of welding equipment, specifically to a welding device and method for German-style bridges. The welding device for German-style bridges includes: a fixed clamping structure comprising a fixed body and a fixed oil seal positioning sleeve mounted on the fixed body; a movable clamping structure comprising a movable body and a movable oil seal positioning sleeve mounted on the movable body; a lifting and adjusting structure comprising a lifting seat arranged between the fixed body and the movable body, and a limiting seat and rollers mounted on the lifting seat; a base plate positioning structure comprising a positioning bushing mounted on the fixed body and the movable body, an expansion sleeve arranged at one end of the positioning bushing, a telescopic tension rod arranged within the positioning bushing, and a frustum-shaped portion arranged at the end of the tension rod and cooperating with the expansion sleeve; a ball support positioning structure; and a gas chamber support positioning structure. The welding device for German-style bridges of this invention simplifies the welding process, reduces repetitive positioning, and improves welding efficiency and welding accuracy.

This invention provides a printing apparatus for printing on the outer peripheral surface of a substrate having a cylindrical, frustum-cone, or conical shape. The printing apparatus can shorten the printing time while ensuring print quality. The printing apparatus includes: a rotating mechanism 21 that rotates the substrate 2 about its axis; and an inkjet nozzle disposed above the substrate 2 and ejecting ink onto its outer peripheral surface. The rotating mechanism 21 includes a motor 25 as a drive source, which rotates the substrate 2 during printing. Printing data for printing the substrate 2 is input into a control unit that controls the printing apparatus. During printing, the control unit controls the rotation speed of the motor 25 based on the printing data.

The utility model relates to a pressure stabilizing type expansion body anchor rod, which belongs to the technical field of geotechnical engineering anchoring and is used for solving the problem of non-uniform anchoring force distribution caused by limited contact area of a single-diameter expansion body section, insufficient uplift bearing capacity and eccentric installation of a traditional anchor rod. According to the technical scheme, an anchor rod body is composed of a center force bearing rod and a peripheral positioning assembly, and the positioning assembly guides the anchor rod to be centered through an elastic positioning piece and an arc guide face; the variable cross-section expansion body mechanism comprises a plurality of expandable sections which are axially distributed, each section forms an expansion body structure with different diameters through independent grouting, and the whole expansion body structure is in a step shape or a frustum shape. The anti-pulling performance of the anchor rod is improved by increasing the contact area and the occlusal force of the anchor rod and a rock-soil body, and the anchor rod adapts to different anchoring requirements of complex stratums and is suitable for engineering scenes such as slope supporting and foundation pit reinforcing.

The invention provides a scratch guard (100) comprising a top section (101) having a preformed portion (101a) configured to remain visible on a top surface of a shelf (200) after installation, where the preformed portion (101a) is shaped as a frustum to provide a sliding surface to a sliding component (300). Further, an intermediate section 102 is provided, the intermediate section 102 comprising a cylindrical portion 102a configured to pass through the slot 204 of the shelf 200, where the cylindrical portion 102a has a height substantially equal to the thickness of the shelf 200. Further, a bottom section 103 is provided having a deformable portion 103a shaped as an inverted frustum wherein the deformable portion 103a is configured to deform during insertion into the slot 204 of the shelf 200 and to return to its original shape after insertion to secure the scratch guard to the shelf 200.

This utility model relates to the field of massage technology, specifically a massage tool, including two handles, two massage sticks, and multiple massage balls. Support plates are provided between each of the two handles and the corresponding massage stick. A cylindrical pin is movably disposed inside the massage ball, and a frustum-shaped cylinder is movably disposed inside the massage stick, with its inclined surface contacting the end face of the cylindrical pin. A quick-release assembly is disposed inside the massage stick, used to drive the frustum-shaped cylinder to move, causing the inclined surface of the frustum-shaped cylinder to press against the cylindrical pin, thereby detaching the massage balls from the massage stick. This massage tool, by setting a cylindrical pin inside the massage ball, allows the cylindrical pin to engage with the corresponding groove during installation, achieving a secure connection. The quick-release assembly then drives the frustum-shaped cylinder to move, and during this movement, the frustum-shaped cylinder presses against the cylindrical pin, thus detaching the massage balls from the massage stick. This allows users to easily replace different massage balls, thereby improving the convenience and flexibility of use.

The utility model discloses an assembly type pyramid-shaped elevator shaft protection platform which comprises a base, a supporting frame is connected to the upper portion of the base, the supporting frame and the base form a frustum-shaped structure, and a plurality of transverse rods are connected to the four side faces of the supporting frame respectively. The frustum-shaped structure is formed by the supporting frame and the base, the four side faces of the supporting frame are respectively connected with the transverse rods, the safety protection function is achieved, and the safety protection device has the advantage of being good in protection safety. The base pull rod is connected with the right-angle seat through the bolt, the cross rod is connected with the diagonal draw bar in a binding mode through the binding wire, and the diagonal draw bar is connected with the insertion sleeve through the bolt, so that quick disassembly and assembly are facilitated; the diagonal draw bar is rotationally connected with the connecting seat, and the inserting sleeve is rotationally connected with the right-angle seat, so that the lifting device can be suitable for elevator hoistways with different sizes within a certain range.

This invention discloses an adjustable rotor spacing structure based on rotational flow focusing, relating to the field of microfluidics. The invention includes a support frame rotatably connected to several rotor shafts, each connected to a rotor. The rotors are frustum-shaped, with any two adjacent rotors arranged in an upside-down configuration. This allows for adjustment of the slit width between adjacent rotors by adjusting their axial positions. By adjusting the axial positions of the rotors, this invention enables flexible adjustment of the slit width between adjacent rotors, allowing for adjustments based on the size of the needle or the desired size of the microdroplets, effectively improving overall flexibility and adaptability. Furthermore, by arranging multiple rotors side-by-side and adjusting the slit widths between them, the droplet preparation device can simultaneously prepare microdroplets of different sizes, significantly improving overall preparation efficiency.

The utility model discloses a bottom comb fixing seat and yarn guide needle bed connecting structure and component, the connecting structure comprises a guide bar hanging bracket seat, a guide bar hanging bracket and a hanging shaft component, one end of the hanging shaft component is arranged on the guide bar hanging bracket seat, and the other end of the hanging shaft component is coaxially provided with a guide connecting shaft and penetrates through the guide bar hanging bracket. And the peripheral surfaces of the guide connecting shafts converge towards one end far away from the lifting shaft assembly to form a frustum. By additionally arranging the frustum-shaped guide connecting shaft, when the guide bar hanging bracket seat and the guide bar hanging bracket are assembled, better guidance quality is achieved, and at the beginning of assembly, the tip end of the frustum can achieve a larger assembly gap, so that the requirement for the initial assembly precision of the guide bar hanging bracket seat and the guide bar hanging bracket is lowered, and in the actual assembly process, the assembly precision is improved. Therefore, it is possible to preassemble the guide bar hanger on the guide needle bed and then sleeve the hanger shaft assembly with the whole structure, a traditional assembly mode is changed, assembly procedures are simplified, labor is saved, and assembly efficiency is improved.

This invention belongs to the field of electric vehicle parts technology, specifically a heavy-duty truck sun gear axle gear clamp, including a base and a mounting base. Both the base and the mounting base are cylindrical structures. A positioning component is set at the bottom of the base. The positioning component includes a positioning plate, a positioning sleeve and a center on the top surface of the positioning plate, and a mounting fastener on the bottom surface. The center is a frustum-shaped structure located inside the positioning sleeve. A connecting rod is set on the top surface, a pull rod is set on the connecting rod, a clamping block and a sleeve are set on the pull rod, a connecting sleeve is set on the positioning sleeve, and a spring clip is set on the connecting sleeve. The spring clip is locked in the mounting base. An open chuck is set at the top of the spring clip, and the pull rod passes through the open chuck. The center positions the bottom end of the sun gear axle to be processed. The clamping block is tightened by the connecting rod and the pull rod, and the spring clip clamps the open chuck, clamping and positioning the side wall of the sun gear axle. At the same time, it prevents the sun gear axle from deforming due to excessive clamping force at both ends, ensuring product quality.

This invention discloses a composite structure embedded part for solid buoyancy materials and its design method. The composite structure embedded part is composed of a metal part and a non-metal part. The non-metal part is cylindrical, with an axial blind hole machined at one end and an internal thread within the axial blind hole. The other end of the non-metal part has a frustum-shaped or frustum-shaped protrusion. The metal part is a sleeve with internal and external threads, connected to the axial blind hole of the non-metal part via threads. The buoyancy material has mounting holes for installing the composite structure embedded part, with the bottom of the mounting holes being either spherical or frustum-shaped. The composite structure embedded part is fixed to the mounting holes of the buoyancy material using adhesive, and a fixing adhesive layer fills the space between the frustum-shaped or frustum-shaped protrusion of the composite structure embedded part and the spherical or frustum-shaped bottom hole of the mounting hole. This invention can solve the problem of cracking of the buoyancy material around the embedded part due to differences in the elastic modulus of the materials.

The utility model discloses a wind-resistant and anti-seismic fence, and relates to the technical field of fences. Comprising vertical rods, the two vertical rods are arranged in parallel, transverse rods are arranged between the two vertical rods, the two ends of each transverse rod are connected with the vertical rods respectively, the two transverse rods are arranged, a plurality of handrails are vertically arranged between the two transverse rods, and the handrails are arranged in parallel; the base is of a quadrangular frustum pyramid structure and is of a hollow structure, an opening is formed in the bottom of the base, vertical holes are formed in the top of the base, the number of the vertical holes is two, sleeves are arranged in the two vertical holes, and the bottoms of the vertical rods of the two fences are sleeved with the two sleeves respectively. By arranging the base and the sandbag, the contact area between the base and the ground can be effectively increased, the fence can be effectively prevented from sliding, and due to the fact that the weight of the sandbag is large, the fence can be kept fixed when the ground vibrates.

The invention refers to a processing chamber (100) shaped concentric around a center axis (101). The processing chamber (100) comprises a conical frustum shaped first body section (1) with a first base side (11) and a second base side (12). The second base side (12) opens into a second body section (2). The second body section extends along the center axis (101) with a first end of the second body section (2) pointing away from the first body section (1). The first end of the second body section (2) opens into a third body section (3). The third body section extends along the center axis (101) with a first end of the third body section (3) pointing in a direction away from the second body section (2) and wherein the first end of the third body section (3) is tapering into a second end (30) of the processing chamber (100).

The utility model provides a high frequency one-way valve with two-way buffer, including valve sleeve, valve core, spring, end cover, the valve sleeve is the hollow structure of two ends opening, its inside communicates with pipe spare A cavity through first opening, simultaneously communicates with pipe spare B cavity through second opening, the first conical frustum hole, first cylinder hole of communicating is set up in the middle part of end cover axially, the valve core is located in the inside of valve sleeve, and the first conical frustum surface is established on the outer wall of head section's front end, and the first conical frustum surface can be sealed with the second conical frustum surface of the inner wall of valve sleeve near first opening, the outer wall of tail section is matched with the inner wall of valve sleeve, and the spring installation cavity of communicating with tail section front end outside is set up axially in tail section rear end, and the cylindrical buffer block of inserting cooperation with first cylinder hole is fixed in spring installation cavity inside, and spring cover is set in cylindrical buffer block outside, and its both ends are respectively with spring installation cavity inner wall, end cover front end abuts the interface, this design can avoid the impact of valve core and end cover when the single valve opens, reduces the noise.