46 results about "Linear section" patented technology

An optical proximity correction (OPC) method for manufacturing a semiconductor chip includes: detecting corners of an original target pattern having a polygonal shape; rounding off the corners to generate a curved target pattern; dividing the curved target pattern into a linear section pattern and a curved section pattern; applying Manhattan OPC to the linear section pattern to generate a modified linear section pattern; applying curvilinear OPC to the curved section pattern to generate a modified curved section pattern; and merging the modified linear section pattern and the modified curved section pattern to generate a corrected pattern.

The invention provides a method for predicting the fish position of a logging cable in a vertical well, and the method comprises the steps: determining the total length of a dropped cable through the length of the cable before and after the cable is broken when a logging instrument is blocked to form a fish in a logging process; calculating the axial pressure of the cable distributed along the well depth according to the total length of the falling cable and the weight of the cable in the liquid; according to different axial pressures of the cable distributed along the well depth and bending deformation of the cable under the action of self weight, the intervals of the bending deformation of the cable in a spiral section, a sine section and a linear section are determined, and the axial deformation amounts of the cable in the spiral section, the sine section and the linear section are calculated respectively; the top well depth position of the fish is determined; through comprehensive analysis, the position of the cable falling into the well is accurately calculated for guiding construction of cable salvage operation, the cable salvage efficiency can be greatly improved, the cable salvage time is shortened, and risks existing in the cable salvage operation are reduced.

The application discloses a kind of modular narrow terminal assembly, top cover assembly and assembly method, it is related to electric core terminal assembly technical field, the narrow terminal assembly is runway shape, including coaxial by inside to outside setting pole, injection molding insulating part, assembly ring;Assembly ring is successively divided from bottom to top into bottom, middle and top, middle is multiple ladder bending structure and is equipped with the plane of set width at bending portion, and top inner side edge is equipped with multiple vertical direction's through type notch, in the linear section of runway shape, waist round notch is used, circular segment adopts circular notch;Injection molding insulating part is formed by injection molding between pole and assembly ring, and injection molding insulating part is passed over assembly ring top and is collected glue in the plane outside in assembly ring middle, while filling the multiple notch of top;Pole is integrally stamped, and pole body is runway shape and the linear section of runway shape constitutes torsion resistance section.The application can realize the narrow terminal assembly assembly of more optimal overcurrent capacity and structural reliability, simpler process.

Embodiments described herein are generally directed to an annular seal including: an annular body defining a cross-section down a central axis, the annular body including: a first linear section oriented down a first plane; a first portion contiguous with the first end of the first linear section, the first portion being curved with respect to the first linear section and in accordance with a first predetermined radius, the first portion extending to a first distal end; a second portion contiguous with the second end of the first linear section, the second portion including: a second linear section oriented down a second plane non-parallel to the first plane; and at least one discrete, radially-oriented tab contiguous with the second linear section and oriented along a circumference of the annular body.

The utility model discloses a connecting component suitable for a bridge stirrup. The connecting component is a curve-shaped variable-thickness sleeve, the thickness of the two ends of the sleeve is small, the thickness of the middle is large, and a linear section is designed in the middle. Threads are machined at the tail ends of the bridge stirrups, and corresponding connecting threads are arranged in the corresponding connecting components. The distance between the end of the bridge steel bar and the middle point of the sleeve does not exceed 10 mm. Bridge stirrups which are not suitable for construction are connected through the curve type variable-thickness sleeve to form a ring in a closed mode, the space needed by construction is small, operation is convenient, the complexity of construction of the rectangular stirrups of the thin-wall hollow pier of the bridge is greatly reduced, and construction efficiency is improved; and the size of the thick sleeve at the joint of the stirrups ensures the anti-shearing and anti-seismic requirements of the stirrups in the plastic hinge section of the bridge pier column, and the connection quality of the stirrups is ensured.

The utility model relates to the technical field of building construction auxiliary equipment, in particular to a double-semicircle and rectangular combined interface pier stud reinforcement cage hoisting device which comprises a supporting frame, the supporting frame is arranged on a connecting seat, the connecting seat comprises arc-shaped supporting plates and linear supporting plates, the arc-shaped supporting plates are symmetrically arranged, and the linear supporting plates are arranged between the arc-shaped supporting plates. The arc-shaped supporting plate is connected with an arc-shaped section of the reinforcement cage, the linear supporting plate is connected with a linear section of the reinforcement cage, and a plurality of lifting lugs are arranged on the supporting frame. The arc-shaped supporting plate is connected with the arc-shaped side of the double-semicircle and rectangular combined section pier column reinforcement cage, the linear supporting plate is connected with the linear side of the reinforcement cage, the arc-shaped side and the linear side of the reinforcement cage are connected correspondingly, the stability of the reinforcement cage is improved, and hoisting deviation caused by the special shape of the double-semicircle and rectangular combined section pier column reinforcement cage is prevented; and a plurality of lifting lugs arranged on the supporting frame are used for lifting.

A headrest assembly (108, 204, 500, 602), comprising: a transverse element (208, 508, 608) configured to be movable in at least one of: a forward direction or a backward direction along a first axis (114, 212), wherein the transverse element comprises a plurality of notches (216, 526, 636), and wherein the plurality of notches is configured to retain a wire (222, 512, 804, 806); an actuating unit (120, 228, 604) which is operatively connected to the transverse element and the wire, wherein the actuating unit is configured to exert a force on the wire; and the wire which is operatively connected to the transverse element and the actuating unit, wherein the wire comprises a first end (234, 640), a plurality of curved sections (238), a plurality of linear sections (244) and a second end (248), and wherein the plurality of linear sections is configured to engage or disengage with the plurality of notches in response to the force exerted by the actuating unit on the first end, such that the wire moves from a first state to a second state to enable controlled movement of the headrest assembly in one or more directions.

The invention relates to a steel fibre for reinforcing concrete or mortar. The steel fiber includes an intermediate portion and anchoring ends located at one or both ends of the intermediate portion. The intermediate portion has a main axis. The anchoring end comprises at least: a first linear section; a first curved section; a second linear section; a second curved section; a third linear section; and a third curved section. The first linear section and the third linear section are curved away from the main axis of the intermediate portion in the same direction. The main axis of the second linear section is substantially parallel to the main axis of the intermediate portion. The invention also relates to a concrete structure comprising the steel fibres according to the invention, and to the use of the steel fibres for reinforcing a load-bearing structure of concrete.

The invention belongs to the technical field of medical instruments, and particularly discloses an anti-falling and angle-adjustable drainage tube which comprises a second linear section, a bent section, an angle adjusting assembly, an inhaul cable, an anti-falling bag and a pipeline, the tail end of the bent section extends to be provided with a first linear section, and the angle adjusting assembly is arranged on the outer side of the second linear section; one end of the inhaul cable is connected with the inner wall of the bent section, the other end of the inhaul cable penetrates through the second linear section to be connected with the angle adjusting assembly, and the angle adjusting assembly adjusts the length of the inhaul cable in the drainage tube and changes the angle of the bent section. An anti-falling bag is arranged on the outer side of the drainage tube and communicated with the pipeline, the anti-falling bag is in a contraction state when implanted, gas or liquid is introduced to expand after the angle of the bent section is adjusted, and therefore axial movement of the drainage tube is limited. The drainage tube adapts to anatomical structures of different patients and has the anti-falling function, and the safety and stability of the drainage tube are improved.

The invention discloses an assembling device for a dust collector bottom cover of a dust collector, and relates to the technical field of assembling devices.The assembling device for the dust collector bottom cover of the dust collector comprises a base, a first rotating disc, a cover body feeding module, a sealing ring feeding module and a plurality of bearing tables, and a plurality of first positioning columns and two second positioning columns are arranged on the upper surfaces of the bearing tables; the two second positioning columns form a positioning gap, the positioning gap is used for clamping the elastic buckle, and the multiple first positioning columns are used for abutting against the hole wall face of the through hole and / or the peripheral wall of the cover body; the sealing ring feeding module is used for enabling the linear section to be arranged on the side, away from the second positioning column, of the central axis of the bearing table so that the linear section can be aligned with the straight surface section. According to the technical scheme provided by the invention, the plurality of first positioning columns and the two second positioning columns are arranged on the bearing table, so that the positioning assembly of the cover body and the sealing ring is realized, and the problems that the sealing ring is difficult to align, and the assembly is not in place due to deviation and distortion are solved.

A wheel (3) includes a core member (32) consisting of a tubular member (140) formed with a plurality of V-shaped notches (142) on one side thereof, and bent into an annular shape so as to close the notches, and a plurality of free rollers (60) each rotatably fitted on a linear section (120) of the tubular member located between a mutually adjoining pair of the V-shaped notches via a bearing (122) provided with an inner race (124) and an outer race (126), wherein a raised piece (130) is provided for each inner race on another side of the tubular member opposite from the one side as well as a protrusion (138) so as to engage an end surface of the inner race and fixedly secure the inner race to the core member.

To provide a compression-adjustable garment that is easy to twist, does not wrinkle, allows the tightening amount to be easily adjusted according to the situation, and also demonstrates effectiveness in alleviating swelling and other conditions.SOLUTION: A compression-adjustable garment 1 is provided with a tubular portion 10 knitted with inserted yarn containing elastic threads, and the compression can be adjusted by twisting the tubular portion 10 in the circumferential direction. In the tubular portion 10, sections without courses of the face yarn are provided at regular intervals in the course direction in a straight line in the wale direction. The length of an opening portion 11 of the tubular portion 10 is 1 / 5 to 1 / 2 of the half circumference of the opening portion 11. The opening portion 11 comprises an outer part and an inner part, and the inner part has higher friction against the skin than the outer part. The opening portion 11 is thicker than the tubular portion 10 other than the opening portion 11. Compression adjustment marks are provided along the circumferential direction of the tubular portion 10. Additionally, a compression confirmation line is provided on the tubular portion 10 between one end (opening) and the other end (heel).SELECTED DRAWING: Figure 11

The utility model relates to a device for quickly assembling and disassembling a template. The device comprises a fence, a fastening component and a supporting component which are all detachable. The fence comprises opposite vertical clamping plates and bent clamping plates. Each fastening assembly comprises a vertical clamping strip parallel to the vertical clamping plate, a bent clamping strip parallel to the bent clamping plate, two cross beam rods and a plurality of bolts. The first cross beam rod penetrates through the two clamping strips and the two baffles at the position close to the plane and within the range of the inclined sections of the bent clamping strips. The second cross beam rod penetrates through the two clamping strips at the position where the two clamping strips are higher than the two baffles and are only located in the linear section range of the bent clamping strips. And a bolt is screwed at one end, exposed out of the corresponding clamping strip, of each cross beam rod. The utility model solves the problems of site limitation, progress restriction and the like, can be widely applied to template manufacturing and mounting, concrete pouring and the like in the fields of pump gate construction, river and canal treatment, dike building and seepage interception, pit and pond treatment, high-standard farmland construction and the like, and is used for reinforced concrete retaining wall construction.

The invention discloses a 16-specification deformed steel bar three-segmentation pass system, relates to the technical field of multi-line segmentation rolling, and mainly aims to eliminate a segmentation belt of a rolled piece so as to avoid the folding defect of the rolled piece, so that the production efficiency is improved, the production cost is reduced, and meanwhile, the product quality is ensured. According to the main technical scheme, the 16-specification deformed steel bar three-segmentation hole pattern system comprises a segmentation hole pattern and a flat oval hole pattern; the slitting hole pattern comprises a middle hole pattern, the middle hole pattern comprises two side wall linear sections which are oppositely arranged, and the height of the middle hole pattern is larger than the distance between the two side wall linear sections. The flat oval hole pattern is rolled in a twisting mode, comprises a groove bottom straight line section and is used for achieving twisting through the groove bottom straight line section and the straight line section of the rolled piece from the slitting hole pattern.

The present invention suppresses cracking from occurring in a corner part during press molding. A method for manufacturing a press-molded article according to the present invention comprises: a pre-molding step for press-molding a blank material into a pre-molded article 40; and a main molding step for molding the pre-molded article 40 into a press-molded article that is a target molded article. The manufacturing method is characterized in that when a linear section 11', which is one from among two linear sections 11', 12 of the pre-molded article 14 and is provided with an outer vertical wall section 43, is such that the end, from among both ends in an extension direction D3 of the linear section 11', closest to the other linear section 12 is defined as a proximal end P2, the end on the opposite side from the proximal end P2 is defined as a distal end P1, and an angle formed by an outer vertical wall section of the press-molded article and the outer vertical wall section 43 of the pre-molded article 40 is defined as an opening angle, press molding is carried out during the pre-molding step such that the opening angle at the proximal end P2 is larger than the opening angle at the distal end P1 and is an opening angle having a positive value.

The utility model relates to the field of tunnel construction, in particular to a multifunctional support for a side arch side wall of a tunnel, which comprises a supporting column, the lower portion of the supporting column is an arc-shaped section, the upper portion of the supporting column is a linear section, the arc-shaped section is arc-shaped, a supporting cross rod is arranged on the upper portion of the supporting column, and the supporting column is connected with the supporting cross rod through the linear section. A telescopic structure is arranged on the linear section, the interior of the supporting cross rod is of a hollow structure, threading holes are evenly formed in the front face and the back face of the supporting cross rod in a penetrating mode, and rubber protrusions are evenly and fixedly arranged on the back face of the supporting cross rod. The multifunctional support is reasonable in structural design and free of damage to a hole wall, the linear section of the upper portion of the supporting column is provided with a telescopic structure, the height of the supporting column is convenient to adjust, the supporting cross rod is used for supporting a communication base station, an illuminating lamp and an emergency lamp, the hook arranged in front of the supporting column can be used for hanging cables, water pipes and the like, and the J-shaped camera supporting rod is used for hanging a camera, so that the multifunctional effect of the support is achieved. The practicability is high.

The steel pipe truss comprises a concrete prefabricated bottom plate (1) and an upper chord steel pipe (2), the left side and the right side of the upper chord steel pipe (2) are each in an arc shape, the upper ends of the arcs on the left side and the right side are connected to form an upper straight line section, the lower ends of the arcs on the left side and the right side are connected to form a lower straight line section, and the lengths of the upper straight line section and the lower straight line section are both 15-80 mm; the prefabricated concrete bottom plate further comprises a web member (3), the web member (3) is formed by continuously bending a hollow steel pipe into a wave shape, the wave crest of the wave-shaped web member (3) is welded to the bottom face of the lower linear section of the upper chord steel pipe (2), and the wave trough part of the wave-shaped web member (3) is buried in the prefabricated concrete bottom plate (1). The hollow web member is creatively welded with the straight section at the bottom of the upper chord steel pipe, and the thickness of the steel plate at the lower straight section of the upper chord steel pipe is increased, so that the defect can be better avoided, and the welding strength is ensured.

The utility model relates to the technical field of linear section bar forming, in particular to follow-up punching equipment with an anti-collision protection system and a linear section bar production line, which comprise a limiting piece and an overload protection device, the limiting piece is supported on a base, and when a linear section bar drives a punching unit to move relative to the base, the overload protection device is arranged on the limiting piece. The limiting piece receives impact force from the base of the punching unit and transmits the impact force to the base. The overload protection device is supported on the foundation and is connected with the base; the overload protection device has the advantages that when impact force transmitted to the overload protection device through the base exceeds a preset triggering threshold value, the overload protection device can deform or break. The overlarge impact force is absorbed and dispersed through the sacrifice overload protection device, irreversible damage to the punch of the punching unit and / or the linear sectional material caused by the linear sectional material when the punching unit is driven to operate is avoided, then the safety and stability of the linear sectional material punching process can be improved, and the machining cost of the linear sectional material is reduced.

The utility model discloses pipe bending equipment which comprises a fixed part, a rotating part, a mold, a first clamping part, a second clamping part, a sliding block and a driving part. When the rotating part is located at the initial position and the first clamping block is matched with one linear section of the die to clamp the pipe, the driving part drives the rotating part to rotate, and then the pipe can be bent. In the process of bending the pipe, the driving part further drives the sliding block to slide, the sliding block abuts against the second clamping block and enables the second clamping block to overcome the elastic piece to stretch out relative to the second installation block to be matched with the arc-shaped section and the other linear section of the die, and it is guaranteed that the bent pipe is attached to the die. The pipe bending machine has the beneficial effects that a pipe is bent more accurately, and the machining quality is improved.

Forming device for transforming a winding mat with a linear meander shape into a circular arc shape for producing a winding of a stator of an electric rotary machine, wherein the winding mat comprises several linear sections (21) of a conductor element (20) which are aligned parallel to each other and are connected to each other by means of angle conductor sections (23) of the conductor element (20), and the angle conductor sections (23) have different lengths on the two longitudinal sides of the meander shape, and linear sections (21) of the conductor element (20) arranged adjacent to each other along the longitudinal direction of the meander shape are equidistant from each other, and wherein the forming device comprises pivot segments (80) equipped with drivers extending in series in a first direction and extending in a second direction different from the first direction.the rotation axes (91) which are pivotable about a third direction, which is different from the first and second directions, so that when the pivot segments (80) pivot, their angles and thus also the angular positions of the drivers (81) with respect to the rotation axes (91) can be changed, so that forces (93) can be applied by the drivers (81) to the conductor element (20) and thereby the conductor element (20) can be deformed in such a way that the linear sections (21) run at angles to each other and linear sections (21) of the conductor element (20) arranged adjacent to each other along the circumferential direction of the meander shape are equidistant from each other.

An experimental measurement and control method for cooling process parameters after hot plate rolling comprises the following steps that (1) an annular track is combined with a trolley, the trolley bears a sample through a sample bearing table to do annular motion, and the annular track is an oval track comprising two parallel linear sections and two semicircular sections; at least one cooling spray box is arranged along the linear section track; the sample is heated to a set temperature through the heating device, and the temperature of the sample is measured through the temperature measuring device; (2) starting the trolley, and carrying the heated sample by the trolley at a specified constant process speed or at a certain accelerated speed in an accelerated manner to do annular motion; the sample passes through the cooling device, and jet flow ejected by the cooling spray box is sprayed onto the sample to cool the upper and lower surfaces of the sample simultaneously; acquiring the temperature of the sample in real time; the running speed of the sample is 0-25m / s, and the acceleration is 0-0.5 m / s < 2 >; the cooling temperature of the sample ranges from normal temperature to 1000 DEG C; the cooling starting temperature and the cooling stopping temperature are from normal temperature to 1000 DEG C; 3) performing performance and microscopic structure detection on the sample; and (4) repeating the step (2) to the step (3), and determining the cooling control parameters of which the performance and the structure meet the requirements according to the measured data.

The invention relates to the technical field of foundation pit excavation and slope supporting engineering, and particularly discloses a large-span foundation pit skewback supporting structure, a design method and a construction method.The structure comprises a waterproof curtain, row piles, supporting piles, supporting beams, inner inclined struts, inclined throwing struts, support piers, top beams, waist beams and anti-floating pressure top beams; the straight edge of the large-span foundation pit adopts densely-arranged row piles or underground diaphragm walls for retaining soil, and multi-span arched sparse-arranged supporting piles are arranged on the inner side of the foundation pit to support the row piles or the underground diaphragm walls. The top beams and the waist beams of the row piles are linear sections, and the top beams and the waist beams of the supporting piles are arc-shaped; the inclined throwing supports transfer arch foot supporting force of the arc arch to the support piers; when the pit bottoms of the row piles and the supporting piles are silt, full-space-shaped or lattice-shaped stirring piles are arranged for reinforcement; internal force calculation and stability analysis are carried out according to a model with the row piles as the active side of the supporting structure and the multi-span skewback as the passive side. The method has the advantages that a large-span inner support is replaced by the multi-span arched support, materials are saved, and the construction period is shortened.

The utility model provides a kind of feeding spoon for photovoltaic silver paste production, comprising: scoop head (1), the scoop head has first side and opposite second side;Spoon handle (2), it includes :-the first linear section (21) that extends from the first side of scoop head;-the curved section (20) that extends from the first linear section along the curved path of second side departure;-the second linear section (22) that extends from curved section;And the third linear section (23) that extends from second linear section, wherein the included angle α is formed between second linear section and third linear section;Wherein, the spoon handle has the first fulcrum (3) at the connecting place of second linear section and curved section, and the second fulcrum (4) at the connecting place of second linear section and third linear section.This feeding spoon adopts bending type spoon handle, can reduce wrist pressure when operating, improves holding comfort.

The application discloses a hinge structure for a connector, which is easy to assemble and disassemble, prevents misplug, and allows 360-degree rotation (whole line). The hinge structure comprises a male module and a female module. The male module is provided with a head, which has an outer wall, an inner wall, and a plug-in cavity defined by the inner wall. The head (or the inner wall / plug-in cavity) is formed with at least two linear sections (and / or arc sections) and / or a limiting part (or an arc section and / or a linear section of the limiting part) protruding towards the plug-in cavity (internal direction) and / or a secondary limiting part. The female module is provided with a secondary plug-in barrel, a secondary outer wall (and / or a secondary inner wall, a secondary plug-in cavity defined by the secondary inner wall). When the plug-in cavity is combined with the secondary plug-in barrel, the secondary outer wall of the female module is tangent to (or tangent to) the linear section (and / or arc section) and / or limiting part (arc section and / or linear section) of the head (or inner wall / plug-in cavity) of the male module, and at least three tangent points are formed to establish the function of stably connecting the male module and the female module.

The invention relates to an arc-shaped winding mat for producing a winding of a stator of an electric rotary machine, a method and a device for producing the arc-shaped winding mat, and a stator of an electric rotary machine. The arc-shaped winding mat (40) has at least one winding of a conductor element (20) in meander shape (10) which forms at least one section of a circular shape, wherein the meander shape (10) comprises several linear sections (21) of the conductor element (20) which are connected to each other by means of angled conductor sections (23) of the conductor element (20), and wherein the conductor element (20) has at least a sectionwise rectangular cross-section to form the meander shape (10), and the linear sections (21) are angular to each other and linear sections (21) of the same conductor element (20) arranged adjacent to each other along the circumferential direction of the meander shape (10) enclose equal angles between each other and the angled conductor sections (23) have different lengths on the two radial sides (41, 42) of the meander shape (10). The arc-shaped winding mat, the method and device for manufacturing the arc-shaped winding mat, and the stator of the electric rotary machine proposed here ensure the cost-effective manufacture and assembly of a stator winding with a small space requirement.

Provided are a folding device and a folding method for an absorbent article with which it is possible to suppress a load acting on an absorber of an absorbent article continuous body when the absorbent article continuous body is folded back.　A first transport device (20) transports an absorbent article continuous body (2) in a linear direction (X) along a reference plane (11), and second transport devices (30, 32, 34) transport a first continuous body (4) of the absorbent article continuous body (2) in the linear direction (X) along the reference plane (11) on the downstream side in the transport direction. Above the second transport devices (30, 32, 34), round belts (41, 43) circulate in a predetermined path including linear sections (41a, 43a) extending in the linear direction (X), inclined members (53 to 57) extending toward the linear sections (41a, 43a) abut on a second continuous body (6) of the absorbent article continuous body (2), and the second continuous body (6) is guided such that the second continuous body (6) overlaps or approaches the first continuous body (4). The round belts (41, 43) moving through the linear sections (41a, 43a) abut on an absorber (8) of the absorbent article continuous body (2).

The embodiment of the utility model provides a rotating shaft structure and a support structure. The rotating shaft structure comprises a first straight line section and a second straight line section, the bent section is connected with one end of the first linear section; the second straight line section is connected with one end, far away from the first straight line section, of the bent section, and the bent section enables an included angle to be formed between the first straight line section and the second straight line section. According to the embodiment, the bent section is connected with the first linear section and the second linear section, so that force borne by the rotating shaft structure can be distributed to the first rotating shaft and the second rotating shaft, the overall strength of the rotating shaft structure is improved, and the rotating shaft structure is not prone to being damaged.

The present disclosure relates to a slide block, the slide block assembly having a ball bushing bearing may include: a slide block which has formed at one side thereof a guide receiving part capable of receiving a slide guide of which at least a portion is formed as a linear section or a curved section; and a ball bushing bearing of which the inner surface is formed so as to correspond to the slide guide so as to be capable of making sliding contact with the slide guide, and the outer surface is formed so as to correspond to the guide receiving part so as to be capable of making rolling contact with the guide receiving part by means of a ball method.

The invention provides an arch foot structure combining and assembling device and method, and relates to the technical field of arch foot structure assembling. The arch foot structure combining and assembling device comprises a horizontal jig frame and a turnover jig frame, the horizontal jig frame comprises a plurality of positioning grooves used for positioning an arch foot structure, and the positioning grooves are distributed in the axial direction of the arch foot structure; the turnover jig frame is located on one side, in the axial direction of the arch foot structure, of the horizontal jig frame and comprises a supporting base, a horizontal linear section, a vertical linear section and a quarter arc section, the quarter arc section is connected between the horizontal linear section and the vertical linear section, and the horizontal linear section is located below the arch foot structure; one end of the supporting seat is connected with the horizontal linear section, the other end of the supporting seat abuts against the circumferential side wall of the arch foot structure in the radial direction of the arch foot structure, the vertical linear section abuts against the radial end face of the arch foot structure, and the arch foot structure is separated from the horizontal jig frame and drives the quarter arc section to rotate by lifting the end, away from the vertical linear section, of the arch foot structure.