229 results about "Circular section" patented technology

The invention discloses a natural ventilation cooling tower and a dumbbell-shaped concrete filled steel tube cross strut thereof, the dumbbell-shaped concrete filled steel tube cross strut comprises four dumbbell-shaped steel tube limb columns and cross nodes, and the end parts of the dumbbell-shaped steel tube limb columns are connected with the cross nodes to form a cross structure; the cross joint comprises a vertical stiffening plate, an upper reinforcing ring, a lower reinforcing ring, a plurality of joint sleeves and a plurality of joint webs, the upper reinforcing ring and the lower reinforcing ring are perpendicularly crossed with the vertical stiffening plate, the joint webs are connected with the joint sleeves, and the joint sleeves, the joint webs, the upper reinforcing ring and the lower reinforcing ring form a dumbbell-shaped structure with the vertical stiffening plate as the central axis. Open holes are formed in the reinforcing rings and used for pouring and circulation of concrete, the four dumbbell-shaped steel pipe limb columns are arranged at the open holes of the upper reinforcing ring and the lower reinforcing ring, and a closed space is formed by the joint sleeve, the joint web, the upper reinforcing ring, the lower reinforcing ring and the four dumbbell-shaped steel pipe limb columns. The problem of material waste caused by rich in-plane directional bearing capacity of a circular section can be solved.

To make it possible to cut obstacles in excavating a tunnel with a non-complete circular cross section.SOLUTION: A tunnel excavation method includes a step of identifying an obstacle location within an excavation cross section on the basis of a third shaft center location within the excavation cross section obtained from a detection result of a first angle sensor 52 and a second angle sensor 54 and a load of a cutter rotating around the third shaft center detected by a load sensor 58, and a step of excavating an obstacle.SELECTED DRAWING: Figure 4

The invention discloses a hydropower station tail water system tail guide combination section connecting structure and a modeling method, and the section shape of the tail guide combination section connecting structure is a circle, a first city gate opening type and a second city gate opening type in sequence from a tail water tunnel to a diversion tunnel; the circular section is connected with the first city gate opening type section through a first gradual transition section; the first door opening type section and the second door opening type section are connected through a second transition section; and the projection of the second transition section on the bottom surface is arc-shaped. According to the invention, a circular-gate opening type-gate opening type arrangement form is adopted, smooth transition is realized through the gradual transition section, sudden change of water flow caused by a square section in the prior art is avoided, the turbulence intensity can be effectively reduced, the pressure fluctuation is reduced, and the water flow efficiency is optimized. According to the modeling method, a model is accurately constructed through parameterization design, then grid division is carried out, structural design is optimized through numerical simulation analysis, and reliable guidance is provided for engineering practice.

The invention belongs to the field of building components, and particularly relates to a prefabricated lattice wall. According to the technical scheme, the structure is formed by splicing a plurality of aerated concrete reinforced plates, a plurality of transverse penetrating type circular-section grouting holes are formed in the aerated concrete reinforced plates, transverse penetrating type semicircular-section grouting holes are formed in the short edges of the aerated concrete reinforced plates, and vertical penetrating type semicircular-section grouting holes are formed in the long edges of the aerated concrete reinforced plates; the two vertical penetrating type semicircular section grouting holes in the splicing position of every two adjacent aerated concrete reinforced plates are spliced to form a vertical circular section grouting hole, and criss-cross hollow grids are formed. Transverse steel bars and vertical steel bars are respectively inserted into the hollow grids to form a criss-cross steel bar net, grouting materials are poured into the hollow grids, and the steel bar net and the grouting materials form a lattice-shaped connecting structure together. According to the prefabricated lattice type wall body, the heat preservation performance, the shock resistance and the construction precision of the wall body can be effectively improved.

The utility model discloses a pelletizing cutterhead provided with multiple combination pelletizing cutters, which comprises a cutterhead with a circular section, a plurality of first mounting holes and second mounting holes which are arranged in a staggered manner are arranged on the cutterhead close to the outer edge, the first mounting holes are circumferentially and uniformly distributed on the cutterhead at equal intervals, and the second mounting holes are arranged on the cutterhead close to the outer edge of the cutterhead at equal intervals. The plurality of second mounting holes are circumferentially and uniformly distributed on the cutter head at equal intervals, and the number of the first mounting holes is not equal to that of the second mounting holes. According to the utility model, the first mounting hole and the second mounting hole are used for mounting two different quantities of pelletizing cutter combinations, so that the pelletizing cutter can meet the production requirements under two capacities at the same time, and the quantity of cutter heads required by different capacities is reduced, so that the production cost is reduced.

The invention discloses an inverted trapezoidal pile cap and connecting beam combined pile-supported embankment structure and a construction method thereof. The structure sequentially comprises a foundation treatment layer, a rigid pile layer, a pile cap layer, a connecting beam layer, a mattress layer, a reinforcement layer and an embankment filling layer from bottom to top. The rigid pile layer comprises a plurality of cast-in-place piles or precast piles vertically arranged in the foundation. The pile cap layer is arranged at the top of the rigid pile, the pile cap is of an inverted trapezoidal structure with a square section, and the top plane size is larger than the bottom to form a load diffusion slope. The adjacent pile caps are connected through connecting beams with circular sections to form a space overall stress system. Grouting pipelines are reserved in the pile cap and the rigid pile and used for later reinforcement. The load transfer area is enlarged through the inverted trapezoidal pile caps, the horizontal rigidity and the torsion resistance are improved through the circular connecting beams, and the overall stability, the anti-settling performance and the long-term service life of the embankment are remarkably improved by combining the grouting pipelines and the reinforcing ribs.

The present application belongs to the technical field of lightweight structure, and particularly relates to a lightweight structure rod layout and discrete size optimization method. The present application is a lightweight design for a three-dimensional structure, adopts point coordinates in a space coordinate system and the number of selected rods to determine the layout form of the three-dimensional structure, the rods are rods with circular cross sections, and then an improved double-value coding parameterization method (referred to as BCP method) is used to determine the diameter size of the selected rods, thereby forming a lightweight structure layout and discrete size optimization design method, so as to facilitate the extraction of geometric parameters of the optimization result, and also facilitate the selection of rods with common regular diameter sizes. The present application avoids the problems of cross overlap between rods, and can provide more design schemes for the optimal rod layout of similar truss structures.

The roughly circular section on the handle is a button that is operated by sliding it back and forth to adjust the water flow of the shower.

The utility model discloses a high-low plate semitrailer capable of longitudinally transporting cargoes with circular sections, which comprises a gooseneck type main frame, a front fixed platform arranged on the upper portion of the front end of the gooseneck type main frame and a rear fixed platform arranged on the upper portion of the rear end of the gooseneck type main frame, and a plurality of movable bottom plates are arranged on the upper portion of the rear fixed platform. Each movable bottom plate comprises a middle bottom plate and two foldable side bottom plates symmetrically arranged on the left side and the right side of the middle bottom plate, each movable bottom plate has two states, in the first state, the movable bottom plate and the rear fixed platform are in a horizontal attaching state, and in the second state, the movable bottom plate and the rear fixed platform are in a horizontal attaching state. And an included angle is formed between the movable bottom plate and the rear fixed platform. The semi-trailer has the advantages that the semi-trailer has various forms, can be used as a high-low plate semi-trailer, and can also be used as a goods transportation semi-trailer with a circular section; compared with a common high-low plate semi-trailer, the medium transported by the semi-trailer is more diversified.

This article is a packaging container formed by molding a sheet-like blank shown in the reference development diagram using a press. The blank shown in the reference development diagram is folded in mountain folds indicated by the dashed lines and in valley folds indicated by the two-dot chain lines. The blank is pressed and heated during molding, melting the synthetic resin coating layer on the surface of the blank, crimping the blank, and maintaining its shape as a packaging container. After the outer edge of the blank is hemmed to a generally circular cross section, the outer edge is pressurized from above and below to form a hemmed portion with a generally elliptical cross section and flat portions on the top and bottom surfaces at the edge of the container, thereby improving overall strength and stably maintaining the shape of the container. When a lid sheet material for sealing this article is adhered to the hemmed portion, the flat portions on the top surface of the hemmed portion improve adhesion. The hemmed portion with a generally elliptical cross section improves strength in the direction parallel to the horizontal direction (lateral direction), making it suitable for wrap packaging.

The present invention is related to a conveyor system (1) for a plant for producing elongated pasta, for example spaghetti, with a transfer unit (3) for transferring conveyor elements (4) from a first conveyor unit (2a) to a second conveyor unit (2b), the transfer unit (3) comprising a rotatably mounted cam element (3a) with a gripping device (3b) and a fixedly arranged guide element (3c) with an approximately circular-segment-shaped surface section (3d), which are arranged relative to each other in such a way that a conveyor element (4) taken over by the gripping means (3b) of the cam element (3a) from the first conveyor unit (2a) can be moved by rotation of the cam element (3a) along the approximately circular-segment-shaped surface portion (3d) of the guide element (3c) to a position where the conveyor element (4) can be taken over by the second conveyor unit (2b). The present invention further relates to a plant (A) for the production of elongated pasta and to a method for conveying elongated pasta.

The invention belongs to the technical field of wire harness processing, and discloses an automobile wire harness cutting mechanism which comprises a guide piece and a clamping piece which are located at the end of a wire harness. The guide element is provided with a guide slope surface extending towards the radial outer side of the wire harness, and the guide slope surface is inserted into and acts on an interface between the braid layer and the insulating layer; an active deformation strategy of internal pressure and external expansion is adopted: a clamping and pressing piece acts on the inner side of the end part of the wire harness, and uniform pressure is applied to the center along the radial direction, so that an original circular section generates controllable local elliptical or flattened deformation. Due to basic conservation of the material volume, the inner side compression inevitably causes outward slight expansion of the outer side area, so that a continuous, annular and width-adjustable initial gap is formed at the interface of the braid layer and the insulating layer. The gap is not dependent on material relaxation, but is actively generated by mechanical force, and has high repeatability and process stability. The guide piece is smoothly wedged in through the gap, and structural damage caused by impact type insertion is avoided.

A delivery pen includes a reservoir including a non-circular shape, a plunger positioned in the reservoir, and a screw mechanism at least partially inserted within the reservoir. The screw mechanism includes a drive shaft including one or more protruding member at a proximal end and an elongated member extending longitudinally from the proximal end, an inner screw concentrically engaging the elongated member, an outer housing including a circular section rotatably engaging the one or more protruding member and a non-circular section sized to fit within the reservoir, and a pusher disposed between the inner screw and the outer housing to linearly translate the plunger so as to dispense a medication from the reservoir.

Voltage wave gears in pot or hat design with a. a circular spline (1) whose circular spline toothing (2) has a number of teeth Cz of 100 < Cz < 104, in particular Cz = 102 teeth, b. a flexspline (3) whose flexspline toothing (4) has a number of teeth Fz of Fz = Cz-2 and a pitch circle diameter TDFS and engages in the circular spline toothing (2) at two opposite points and whose wall (5) in its basic form is circular in cross-section and has a flexspline inner diameter IDFS, and with c. a shaft generator (6) having a radially flexible rolling bearing (7) by means of which an oval shaft generator insert (8) is rotatably mounted, characterized in that d. for the pitch circle diameter TDFS: 63.0 mm < TDFS < 64.0 mm, in particular 63.5 mm, and / or that for the flex spline inner diameter IDFS: 60.8 mm < IDFS < 61.8 mm, in particular IDFS = 61.3 mm, and that e. for the axial length LFS of the wall (5) of the flexspline (3) the following applies: LFS < IDFS / 3.00, in particular LFS < IDFS / 3.17 or LFS < IDFS / 3.73, and that i. the oval shape of the wave generator insert (8) in polar coordinates (φ, R(φ)) satisfies the following conditions: - For all φ ∈ {kπ | k ∈ ℤ}, Hmin < |R(φ)| < Hmax, where Hmin = 23.124 mm and Hmax = 23.132 mm, and - For all φ ∈ {π / 4 + kπ / 2 | k ∈ ℤ}, |R(φ)| > c, where c = 22.627 mm, and - For all φ ∈ {π / 2 + k·π | k ∈ ℤ}, the following holds: |R(φ)| < d, where d = 22.03 mm, and / or ii. that the radially flexible rolling bearing (7) has a cross-sectional height Sh in the direction φ=0 and a cross-sectional height Sn in the direction φ-π / 2 and that the oval shape of the radially flexible rolling bearing (7) in polar coordinates (φ, R(φ)) satisfies the following conditions: - For all φ ∈ {kπ | k ∈ ℤ}, Hmin + Sh < |R(φ)| < Hmax + Sh, where Hmin = 23.124 mm and Hmax = 23.132 mm, and - For all φ ∈ {π / 4 + kπ / 2 | k ∈ ℤ}, |R(φ)| > c+(Sh+Sn) / 3, in particular |R(φ)| > c+(Sh+Sn) / 2.6 or |R(cp)| > c+(Sh+Sn) / 2.3, where c = 22.627 mm, and - For all φ = {π / 2 + k·π | k ∈ ℤ}, |R(φ)| < d+Sn, where d = 22.03 mm.

The invention relates to the technical field of shear model boxes, and discloses a novel layered shear model box capable of simulating multi-directional vibration. Comprising a circular base, an outer stand column is fixedly connected to the upper surface of the circular base, a first spring is fixedly connected to the side surface of the outer stand column, and an inner annular steel sheet is fixedly connected to the end, away from the outer stand column, of the first spring. Through horizontal movement of the outward-extending steel rod, the outward-extending steel rod can drive the parallel stabilizing wheel to move horizontally, the parallel stabilizing wheel can roll on the surface of the external horizontal supporting rod, the stability of the outward-extending steel rod when the outward-extending steel rod drives the internal annular steel sheet to move horizontally can be improved, and the direct friction force between the outward-extending steel rod and the internal annular steel sheet is small; and the horizontal supporting rods on the external stable frame can play a role in restraining the outwards-extending steel rods, and it is guaranteed that the internal annular steel sheets only conduct shearing deformation in the horizontal direction.

According to the plastic protective shell for the air spring, the taper guide face and the arc transition face are arranged at the inlet of the annular assembly groove of the protective shell body so as to disperse stress and prevent cracking; the groove adopts a non-circular section and is provided with a one-way anti-retreating structure, so that bidirectional mechanical locking is realized, and loosening is prevented; targeted annular reinforcing ribs are arranged in the areas, corresponding to the grooves, of the shell so as to enhance fatigue resistance. The elastic characteristic of plastic is converted into the assembly advantage, the reliable connection problem of the plastic protective shell is systematically solved, the lightweight advantage of the plastic protective shell is practical, and meanwhile the assembly process is simple and efficient.

The utility model discloses a kind of circular section drainage channels, including the drainage channel in curbstone one side, drainage channel is provided with drainage passage along length direction, the top of drainage channel is provided with multiple water inlets, and support block is arranged between two adjacent water inlets;The upper portion of the drainage channel is plane structure, and the inner wall of the top of the two sides of water inlet is inclinedly arranged, and water inlet is communicated with drainage passage. The utility model is reasonable in design, high in drainage efficiency, and convenient to maintain.

The present invention provides a support base structure that enables the maintenance of a facility in its correct position by generating rotational resistance even when rotational force is applied to the support due to wind pressure acting on the facility suspended from the support. According to a suitable embodiment of the present invention, the support base structure comprises a foundation block made of precast concrete, a support with its lower end inserted into the foundation block to a certain depth, and a fixing clamp that is fastened to an anchor bolt embedded in the foundation block and exerts a clamping force on the support. In this structure, a plurality of fixing keys for preventing rotation of the support are installed in a circular arrangement at the lower end of the support, and a support coupling hole is formed in the foundation block, which has a circular cross-section larger than the cross-section of the lower end of the support and is recessed to a certain depth from the upper surface, so that the lower end of the support is inserted to a certain depth, wherein a plurality of mortar-filling grooves for key coupling are formed in a circular arrangement with a certain depth on the inner surface of the support coupling hole. The above-mentioned support is characterized by the fact that a filling material is injected around the lower portion of the support and filled into a mortar filling groove for key coupling, and at the same time, a fixing key coupling groove is formed between the lower portion of the support and the inner surface of the support coupling hole to be coupled with a fixing key for preventing rotation of the support, and a cylindrical ring for preventing rotation is formed to have a filling groove coupling key filled in the mortar filling groove for key coupling.

To provide a method of manufacturing an electrical contactor including a volute spring structure extending in upward and downward directions formed integrally using a single material, having mechanical simplicity and excellent functionality, and functioning as an electric circuit achieving connection without loss. The present disclosure relates to a method of manufacturing an electrical contactor formed from a single rod-like conductive member of a circular cross section, the method comprising: a first step of forming a spiral slit with respect to an upper portion and / or a lower portion to be cylindrically formed of the rod-like member; a second step of winding up the upper portion and / or the lower portion of the rod-like member subjected to the slit formation performed by the first step so as to form a conical shape; and a third step of compressing a spiral structure of each hierarchy of the upper portion and / or the lower portion of the spiral rod-like member wound up by the second step until the spiral structure of each hierarchy overlaps with each other, and then performing a hardening heat treatment to form an electrical contactor including a spiral-structured elastic portion.

The application relates to an aerodynamic profile suitable for a wind tunnel and a design method thereof, and belongs to the technical field of aviation aerodynamic wind tunnel tests. The front end surface of the aerodynamic profile is a square section, the rear end surface of the aerodynamic profile is a circular section, the middle part of the aerodynamic profile is a transition section, and the front and rear sections are connected through the change of the section shape from front to back. The research and development purpose is to provide a novel aerodynamic profile design method for the transition from a square section to a circular section, the flow field can be smoothly transitioned from a square to a circle, the influence on the flow field quality is minimized, the pressure loss is reduced, and the method of rounding the right angle and gradually increasing the rounding radius is adopted to realize the smooth transition from the square section to the circular section. The circular arc curve is gradually lengthened, the right angle side is gradually shortened, and finally the profile line is completely changed into a circular shape. The transition mode is natural and smooth, the change is gentle, the aerodynamic performance is good, and the interference on the flow field due to the change of the section shape can be obviously reduced.

The utility model belongs to the technical field of cleaning machine, especially relate to the cleaning machine inner bag structure, be located in the shell of cleaning machine, including the cavity of top opening, cavity top end is equipped with the annular step position of outward extension, the bottom of step position is equipped with the installation component of downward extension, and installation component and the annular support component cooperation of shell top, the cavity has the gradually changing cross -section structure of big down small, and the upper part is square section and gradually changes into circular section downward, the cavity lateral wall below is equipped with the air inlet, and the cavity bottom forms the arc flow guide portion of downward concave, and the flow guide portion is equipped with high -level water inlet and low -level drain, when the airflow flows into the cavity from the air inlet, the cavity bottom forms the airflow channel of low resistance, and the vortex is formed to the airflow rotation movement, makes air along the inner wall spiral ascending, prolongs the airflow path, improves the drying efficiency to the inner bag and the article in the cavity. The gradually changing cross -section structure design of big down small, reduces stress concentration, promotes the overall strength of inner bag structure, strengthens the compression resistance.

Stress wave gear in pot or hat design with a. a circular spline (1) whose circular spline toothing (2) has a number of teeth Cz of 100 < Cz < 104, in particular Cz = 102 teeth, b. a flexspline (3) whose flexspline toothing (4) has a number of teeth Fz of Fz = Cz-2 and a pitch circle diameter TDFS and engages in the circular spline toothing (2) at two opposite points and whose wall (5) in its basic form is circular in cross-section and has a flexspline inner diameter IDFS, and with c. a shaft generator (6) having a radially flexible rolling bearing (7) by means of which an oval shaft generator insert (8) is rotatably mounted, characterized in that d. for the pitch circle diameter TDFS: 34.4 mm < TDFS < 35.4 mm, in particular 34.9 mm, and / or that for the flex spline inner diameter IDFS: 33.4 mm < IDFS < 34.4 mm, in particular IDFS = 33.9 mm, and that e. for the axial length LFS of the wall (5) of the flexspline (3) the following applies: LFS < IDFS / 2.05, in particular LFS < IDFS / 2.16 or LFS < IDFS / 3.35, and that i. the oval shape of the wave generator insert (8) in polar coordinates (φ, R(φ)) satisfies the following conditions: - For all φ ∈ {kπ | k ∈ ℤ}, Hmin < | R(φ) | < Hmax, where Hmin = 12.830 mm and Hmax = 12.838 mm, and - For all φ ∈ {π / 4 + kπ / 2 | k ∈ ℤ}, the following holds: | R(φ) | > c, where c = 12.549 mm, and - For all φ ∈ {π / 2 + k·π | k ∈ ℤ}, the following holds: | R(φ) | < d, where d = 12.22 mm, and / or ii. that the radially flexible rolling bearing (7) has a cross-sectional height Sh in the direction φ=0 and a cross-sectional height Sn in the direction φ=π / 2 and that the oval shape of the radially flexible rolling bearing (7) in polar coordinates (φ, R(φ)) satisfies the following conditions: - For all φ ∈ {kπ | k ∈ ℤ}, Hmin + Sh < | R(φ) | < Hmax + Sh, where Hmin = 12.830 mm and Hmax = 12.838 mm, and - For all φ ∈ {π / 4 + kπ / 2 | k E ℤ}, | R(φ) | > c+(Sh+Sn) / 3, in particular | R(φ) | > c+(Sh+Sn) / 2.6 or | R(φ) | > c+(Sh+Sn) / 2.3, where c = 12.549 mm, and - For all φ ∈ {π / 2 + k·π | k ∈ ℤ}, the following holds: | R(φ) | < d+Sn, where d = 12.22 mm.

The utility model discloses a cutter shaft combination structure with an anti-dropping function, which comprises a rotating roller, a cutter combination body and a retaining mechanism, the rotating roller is a straight roller body with a circular section, and the left end and the right end of the rotating roller are respectively provided with a rotating shaft. The cutter combination bodies comprise a plurality of cutter combination bodies which are arranged at equal intervals in the axial direction of the rotating roller, and each cutter combination body comprises two cutter combination bodies which are annularly and uniformly arranged on the periphery of the rotating roller. The cutter assembly comprises a pin shaft seat, a pin shaft with a head, a cutter head and a cutter handle, the pin shaft seat is fixed on the rotating roller, the cutter head is rotatably connected with the pin shaft seat through the cutter handle, a retaining mechanism is mounted on the right side of each pin shaft seat and comprises a mounting plate and a bolt assembly, and the bolt assembly is fixed on the right side of the pin shaft seat through the mounting plate; and the strip-head pin shaft is prevented from separating from the inner side of the pin shaft seat. The retaining mechanism can limit the pin shaft with the head, prevents the pin shaft with the head from falling off from the pin shaft seat, is firm in structure and not prone to falling off, and improves working safety.

This application provides a process, apparatus, and design method for roll forming of non-circular cross-section irregular shells. The design method includes the following steps: A1, designing the three-dimensional shape of the punch based on the three-dimensional shape of the inner wall of the non-circular cross-section irregular shell; A2, determining the number of a set of cooperating forging rolls based on the three-dimensional shape of the outer wall of the non-circular cross-section irregular shell, wherein the number of forging rolls is greater than or equal to 2, and the axes of all forging rolls are coplanar; A3, designing the shape of the loading surface of each forging roll based on the three-dimensional shape of the outer wall of the non-circular cross-section irregular shell, wherein the intersection line of the loading surface and the contact plane constitutes the outer perimeter of the die orifice of the irregular shell forming apparatus, the intersection line of the outer wall of the punch and the contact plane constitutes the inner perimeter of the die orifice, and the contact plane is the plane formed by the intersection of the axes of all forging rolls. The technical solution of this application can effectively improve the roll forming quality of non-circular cross-section irregular shells.

A shoulder prosthesis baseplate (100) comprising a through-hole (102) for a compressive screw (101), wherein the through-hole (102) has a circular profile section and comprises a projecting edge (106) arranged internally and perpendicularly to an axis (102j of the through-hole (102), the projecting edge (106) being configured to axially retain a head (103) of the compressive screw (101) inserted in the through-hole (102). The projecting edge (106) has circular are shape and delimits a corresponding free portion (108) of the circular profile section internally to the through-hole (102), the free portion (108) being configured to allow the screwing passage of a threaded stem (104) of the compressive screw (101) to surpass the projecting edge (106).

The invention relates to a thermoplastic composite comprising:at least one straight portion having a circular section with an external diameter, and a longitudinal axis,at least one bent portion,at least one bending radius, of the at least one bent portion the bending radius being at most a factor f equal to 5 with respect to the external diameter of the at least one straight portion, anda thermoplastic matrix and a fiber reinforcement.The invention also relates to a structure to be reinforced comprising at least one thermoplastic, uses of a thermoplastic composite and a method for producing a thermoplastic composite.

This article is a packaging container formed by molding a sheet-like blank shown in the reference development diagram using a press. The blank shown in the reference development diagram is folded in mountain folds as indicated by the dashed lines and in valley folds as indicated by the two-dot chain lines, and the blank is heated while being pressed during molding, causing the synthetic resin coating layer on the surface of the blank to melt and the blank to be crimped and maintain its shape as a packaging container. Furthermore, the outer edge of the blank is rolled, forming a rolled portion with a substantially circular cross section at the edge of the container, thereby improving the overall strength and stably maintaining the shape of the container. This article has an octagonal bottom and a step on the side with two horizontal ridges, making it resistant to twisting and suitable for plastic wrap packaging or shrink film packaging.

The utility model relates to a tunnel boring machine with an adjustable section, and belongs to the technical field of tunnel boring machines. The section-adjustable cutter head comprises a telescopic inner beam and a cutting tool, and the excavation section is adjusted through hydraulic driving; the section-adjustable shield body is provided with an external variable-section shield shell, and the section shape is adjusted through a telescopic oil cylinder. And the central rotary joint is matched with the main drive to drive the cutterhead to rotate and control the cutting direction. The telescopic inner beam is hydraulically driven to stretch out and draw back, the shape of an excavation section is adjusted, the telescopic oil cylinder adjusts the shape of an external variable-section shield shell, conversion of a circular section, a rectangular section or a combined section is achieved, and meanwhile continuous deformation of the shield shell is achieved by synchronously controlling the stretching amount of the telescopic oil cylinder. The heading machine can complete adjustment of various sections in the shutdown state of the tunnel, the requirements of different tunnels are met, and the heading efficiency and flexibility are improved.