CN116654208A - A double-wall circular tube support and a method for manufacturing the double-wall circular tube support - Google Patents

Abstract

The invention discloses a double-wall round pipe pillar and a manufacturing method thereof, comprising an inner pipe and an outer pipe; the inner tube is a hollow round tube; the outer tube comprises a plurality of arc tube plates, and the arc tube plates are surrounded on the outer part of the inner tube; and a pipe seam is formed between the adjacent arc-shaped pipe plates, a welding body is arranged in the pipe seam, and the adjacent arc-shaped pipe plates and the inner pipe are fixed through the welding body. The double-wall round tube pillar is characterized in that a large round tube is used as an outer tube, a small round tube is used as an inner tube, the large round tube is cut to form a plurality of arc tube plates, the outside of the small round tube is sleeved with the arc tube plates, then welding is carried out, fixation between the arc tube plates and fixation between the arc tube plates and the small round tube inside are achieved, and the double-wall round tube pillar is formed. The double-wall round pipe strut has the advantages that the structural strength is improved, the round pipe for manufacturing the strut is convenient to purchase, the weight is increased little, and the space and strength requirements of ships are met. The manufacturing method of the double-wall round pipe strut is high in efficiency.

Description

A double-wall circular tube support and a method for manufacturing the double-wall circular tube support

technical field

The invention relates to the technical field of shipbuilding, in particular to a double-wall circular tube support and a method for manufacturing the double-wall circular tube support.

Background technique

Between two adjacent decks of the ship, pillars need to be set to support the equipment and personnel on the upper deck. In related technologies, hollow tubes are generally used as ship pillars. However, the hollow tubes have limited strength and cannot meet higher force requirements.

When there are higher requirements for the strength of the pillar structure, some ships increase the number of hollow tubes to increase the structural strength of the cabin, which will reduce the interior space of the cabin. When there are many pillars in the cabin, it will affect the passage of pedestrians and vehicles, and affect the equipment in the ship. Settings that affect sightlines.

Contents of the invention

The purpose of the embodiments of the present invention is to provide a double-walled circular tube support and a method for manufacturing the double-walled circular tube support. The double-walled circular tube support is formed by assembling large and small circular tube supports to improve the strength of the support.

For reaching above-mentioned purpose, the present invention adopts following technical scheme:

A double-wall circular tube support, including an inner tube and an outer tube;

The inner tube is a hollow tube; the outer tube includes a plurality of arc-shaped tube plates, and the plurality of arc-shaped tube plates surround the outside of the inner tube; a tube is formed between adjacent arc-shaped tube plates. seam, the pipe seam is provided with a welded body, and the adjacent arc-shaped tube sheets, between the arc-shaped tube sheets and the inner tube are fixed by welded bodies

Optionally, the outer tube includes two arc-shaped tube plates, and the two arc-shaped tube plates include a first half-pipe and a second half-pipe; one side of the first half-pipe is connected to the The second half-pipes are fixed by a first welding body, and the other side of the first half-pipe and the second half-pipe are fixed by a second welding body.

Optionally, the number of the arc-shaped tube plates in the outer tube is two or four.

Optionally, the first half-pipe and the second half-pipe are symmetrical about the central axis of the inner pipe, the inner wall of the first half-pipe abuts against the outer wall of the inner pipe, and the second half-pipe The inner wall of the tube abuts the outer wall of the inner tube.

Optionally, the end face of the arc-shaped tube plate in the length direction is flush with the end face of the inner tube in the length direction.

A method for manufacturing a double-walled circular tube pillar, used to manufacture the pillar described in the above scheme; the manufacturing method for the double-walled circular tube pillar includes:

Cutting step: cutting along the length direction of the large round tube to form a plurality of arc-shaped tube sheets;

Welding step: a plurality of arc-shaped tube sheets surround the outside of the small round tube along the circumference of the small round tube, and weld at the pipe seams between adjacent arc-shaped tube sheets to form the double Wall tube pillars; the small round tube is the inner tube, and the outer tube is formed by welding a plurality of arc-shaped tube sheets.

Optionally, an assembling step is also included, and the assembling step is performed between the cutting step and the welding step;

The assembling step: install a plurality of the arc-shaped tube sheets at intervals along the circumference of the inner tube, and keep pipe seams between adjacent arc-shaped tube sheets;

The welding step: at the position of the pipe seam, welding is performed along the length direction of the inner pipe, so that the pipe seam is used for fixing the adjacent arc-shaped tube plate and for fixing the arc-shaped tube plate. The welded body of the tube sheet and the inner tube.

Optionally, in the cutting step, the large circular tube is cut to form two symmetrical arc-shaped tube plates.

Optionally, in the cutting step, the large circular tube is cut to form two symmetrical arc-shaped tube plates.

Optionally, a pipetting step is also included; the pipetting step is performed between the cutting step and the assembling step;

In the cutting step:

The support frame used includes two half-frames, the two half-frames can move away from each other or move closer to each other, each of the half-frames includes a half-slot, when the two half-frames are combined forming the arc-shaped groove;

During the pipetting step:

After cutting the large round tube into two arc-shaped tube sheets, moving the half-frames to separate the two half-frames so that the two arc-shaped tube sheets are separated;

Move the small circular tube between the two half-frames;

Moving the half-frames makes the two half-frames close to each other, so that the two arc-shaped tube plates are fitted on the left and right sides of the small round tube respectively.

The beneficial effects of the present invention are: the double-walled circular tube pillar uses a large circular tube as the outer tube and a small circular tube as the inner tube, the large circular tube is cut to form a plurality of arc-shaped tube sheets, and a plurality of arc-shaped tube plates are placed outside the small circular tube. Shaped tube sheet, and then welded to realize the fixation between the arc-shaped tube sheet and the arc-shaped tube sheet, between the arc-shaped tube sheet and the inner small round tube, and form a double-walled round tube pillar. The structural strength of the double-walled circular pipe pillar is improved, and the circular pipe used to manufacture the pillar is convenient to purchase, and the weight increase is small, which meets the space and strength requirements of the ship. The manufacturing method of the double-walled circular tube strut is used to manufacture the aforementioned strut.

Description of drawings

The present invention will be described in further detail below according to the drawings and embodiments.

Fig. 1 is a cross-sectional view of a double-walled circular tube support according to an embodiment of the present invention;

Fig. 2 is an enlarged view of part A in Fig. 1;

Fig. 3 is a schematic cross-sectional view of a large circular tube and a small circular tube used in the double-walled circular tube pillar of the embodiment of the present invention;

Fig. 4 is a schematic diagram of cutting a large round tube during the manufacturing process of the double-walled round tube support according to the embodiment of the present invention;

Fig. 5 is a schematic diagram of assembling a plurality of arc-shaped tube plates and small round tubes during the manufacturing process of the double-walled round tube support according to the embodiment of the present invention;

Fig. 6 is a schematic structural view of the support frame used in the manufacturing method of the double-walled circular tube pillar described in the embodiment of the present invention, wherein the two half-frame bodies of the support frame in Fig. 6 (a) are in a merged state, and in Fig. 6 (b) The two half-frame bodies of the support frame are in a separated state.

Fig. 7 is a schematic diagram of the cutting steps of the method for manufacturing a double-walled circular tube pillar according to an embodiment of the present invention;

Fig. 8 is a schematic diagram of pipe transfer steps in the method for manufacturing a double-walled circular pipe pillar according to an embodiment of the present invention;

Fig. 9 is a schematic diagram of the welding steps of the manufacturing method of the double-walled circular tube pillar according to the embodiment of the present invention.

In the figure: 10, inner tube; 20, outer tube; 21, arc-shaped tube plate; 22, welded body; 30, small round tube; 40, large round tube; 41, pipe seam; 50, support frame; 501, arc Groove; 502, groove part; 51, half-frame body; 60, pipe support.

Detailed ways

In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only the technical solutions of the present invention. Some, but not all, embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

In the description of the present invention, unless otherwise clearly stipulated and limited, the terms "connected" and "fixed" should be understood in a broad sense, for example, it can be fixed connection, detachable connection or integration; it can be mechanical connection , can also be an electrical connection; it can be a direct connection or an indirect connection through an intermediary, it can be an internal communication between two components or an interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

In the present invention, unless otherwise clearly specified and limited, a first feature being "on" or "under" a second feature may include direct contact between the first and second features, and may also include the first and second features Not in direct contact but through another characteristic contact between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In the construction area of special ships such as ro-ro passenger ships and luxury cruise ships, due to the need for strength, evenly distributed pillars are arranged in the wide-span indoors to support the weight of the upper structures, equipment and personnel. In ships, hollow pipes are generally used as pillars in the superstructure of ships. However, hollow circular tubes sometimes cannot meet higher structural strength requirements. In order to improve the structural strength of the ship's superstructure, solid arc-shaped tube sheets can be used, or the number of hollow circular tubes can be increased. However, the weight of the solid arc-shaped tube plate is relatively large, and it is easy to affect the center of gravity of the ship's superstructure. However, increasing the number of hollow circular tubes will occupy indoor space, affect the arrangement of facilities and equipment in the ship around the pillars, affect the passage of people or objects indoors, and affect the line of sight.

In order to solve the problems of limited structural strength of ship props, difficulty in purchasing prop materials, and limited space for ship construction in related technologies, the present invention provides a double-walled circular tube prop and a method for manufacturing the double-walled circular tube prop.

Please refer to FIG. 1 to FIG. 5 , the double-wall circular tube support includes an inner tube 10 and an outer tube 20 . The inner tube 10 is a small round tube 30 , and the outer tube 20 includes a plurality of arc-shaped tube plates 21 cut from a large round tube 40 , and a welding body 22 for fixing the inner tube 10 of the arc-shaped tube plates 21 . It should be noted that a plurality refers to more than two, and a plurality includes two.

Among them, a plurality of arc-shaped tube plates 21 surround the outside of the inner tube 10; tube seams 41 are formed between adjacent arc-shaped tube plates 21, and welded bodies 22 are arranged in the pipe seams 41, and the welded bodies 22 are formed by solidification of welding materials. structure. Between adjacent arc-shaped tube sheets 21, between the arc-shaped tube sheets 21 and the inner tube 10 are fixed by the welded body 22, in other words, the welded body 22 in one tube seam 41 realizes two arc-shaped tube sheets 21 and the inner tube 10 Fixation between the three components.

In a kind of manufacturing method of this double-walled circular tube support, purchase two kinds of fittings of two kinds of large circular tubes 40, small circular tubes 30, large circular tubes 40, small circular tubes 30 are hollow circular tubes, and the outer diameter of small circular tubes 30 is less than Large circular pipe 40 internal diameters. After cutting the large round tube 40, a plurality of arc-shaped tube sheets 21 are obtained, and then the arc-shaped tube sheets 21 are placed outside the small round tubes 30, and gaps are reserved between adjacent arc-shaped tube sheets 21 to form tube seams 41, and a welding machine is used to Welding is carried out at the pipe seams 41 along the length direction of the small round pipe 30, and after all the pipe seams 41 are welded, the double-walled round pipe pillar is formed.

In this double-walled circular tube support, the small circular tube 30 positioned on the inner side is used as the inner tube 10, and a plurality of arc-shaped tube sheets 21 positioned on the outside form the outer tube 20 after being welded. Although the layer structure is still a hollow structure as a whole, it has a larger tube wall thickness, which can increase the strength of the pillar structure and increase the section modulus of the pillar.

When manufacturing ships, hollow pipes used for pillars are generally purchased from outside. The types of hollow pipes on the market are limited. When the outer diameter of a certain type of pipe fitting meets the requirements, the wall thickness of the pipe body cannot meet the requirements.

However, in the present invention, the large round tube 40 and the small round tube 30 can be purchased directly, and the large round tube 40 can be cut and assembled and welded with the small round tube 30 to obtain a double-walled hollow tube. The double-walled hollow tube is used as a pillar, and hollow tubes of two diameters can be purchased directly, and then the tubes can be assembled and welded.

The present invention can use the hollow round tube originally used as a pillar as the outer tube 20, on this basis, add a small hollow round tube as the inner tube 10, and rationally combine and install the large round tube 40 and the small round tube 30 to obtain The double-wall circular tube support of the present invention.

The outer dimensions and shape of the double-walled circular tube prop of the present invention are the same as those of the original prop. Therefore, compared with the original hollow circular tube prop, the double-walled circular tube prop of the present invention can be used without changing the original ship indoor prop. Increase the structural strength of the pillars in the case of the number, location and layout of the pillars, and the outer dimensions of the pillars.

The double-wall circular tube prop of the present invention, under the premise of ensuring that the arrangement space around the prop in the cabin of the ship’s superstructure is not affected, at the same time considers that it can directly purchase the spot stock in the market without customizing the prop pipe fittings, and the weight of the prop will not increase too much, reducing the cost. Controllable, through the combined installation of components, when the pillar is applied to ships, it can meet the space requirements and structural strength requirements.

In one embodiment, the wall thickness of the large circular tube 40 and the small circular tube 30 are the same but different in diameter. In other words, the wall thickness of the inner tube 10 and the arc-shaped tube sheet 21 are the same. In this way, when purchasing round pipes, you can purchase round pipes with the same wall thickness and different sizes, and the raw materials are easy to obtain without special customization.

In one embodiment, no matter how many arc-shaped tube sheets 21 the outer tube 20 includes, the outer tube 20 is configured so that the structures of the plurality of arc-shaped tube sheets 21 are the same, so as to ensure uniform strength of the overall structure of the pillar. In other words, the dimensions of each arc-shaped tube plate 21 in the circumferential direction of the pillar are the same, and the width of each arc-shaped tube plate 21 is the same, so as to ensure that each arc-shaped tube plate 21 can evenly transmit the stress between the upper and lower decks, and avoid different arcs. The strength of the strut structure is affected by different forces on the shaped tube sheet 21 .

In one embodiment, the outer tube 20 includes two arc-shaped tube sheets 21, and the two arc-shaped tube sheets 21 include a first half-pipe and a second half-pipe; The space is fixed by the first welding body 22 , and the other side of the first half pipe is fixed by the second welding body 22 to the second half pipe.

Wherein, the first half pipe and the second half pipe are formed by cutting the same hollow circular pipe.

In one embodiment, when the diameter of the large round tube 40 is large, the large round tube 40 may be cut twice to obtain three arc-shaped tube plates 21 when the pillar is manufactured. In this way, when manufacturing the pillar, it is necessary to weld the positions of the three pipe seams 41 , and the double-walled circular pipe pillar includes three welded bodies 22 formed of welding materials. The outer tube 20 is adopted to include three pillars of arc-shaped tube plates 21, the welding position is increased, and the area of the welded connection between the outer tube 20 and the inner tube 10 is increased, which can ensure that the larger-diameter large round tube 40 can be firmly cut. The ground and inner view are welded and fixed to ensure the overall structural strength of the pillar.

In one embodiment, the total number of arc-shaped tube plates 21 in the pillar is two or four.

When the pillar is applied to the superstructure of the ship, the pillar is fixed between the upper deck and the lower deck. Each deck includes a board body, and transverse and longitudinal members fixed to the main body. The longitudinal members are arranged along the longitudinal direction of the ship, and the transverse members are arranged along the transverse direction of the ship. The longitudinal members mainly carry the longitudinal force to ensure the longitudinal strength of the deck, and the transverse members mainly carry the transverse force to ensure the transverse strength of the deck. Wherein, the direction of the width of the ship is the transverse direction of the ship, and the direction of the length of the ship is the longitudinal direction of the ship. Longitudinal members can be, but not limited to, girders and longitudinals; longitudinal members are used to withstand the longitudinal bending moment of the ship and ensure the overall longitudinal strength. Transverse members are collectively called beams, which can be divided into ordinary beams, half beams, hatch end beams, and strong beams according to the position and size of the beams. The transverse members are used to ensure the transverse strength of the hull. Generally, the deck can be divided into transverse frame structure and longitudinal frame structure. In the transverse frame structure, the transverse member is the main load-bearing member, and in the longitudinal frame structure, the longitudinal member is the main load-bearing member.

Among them, the struts are arranged at the interlaced positions of the transverse members and the longitudinal members, which can effectively support the deck through the struts and improve the stress transfer effect of the upper and lower decks.

When the outer tube 20 in the pillar includes two arc-shaped tube plates 21 , two weld seams, ie, two welded bodies 22 , are formed on opposite sides of the pillar. When installing the double-walled circular pipe pillar, the welded body 22 can be inclined horizontally or vertically relative to the ship, so as to avoid the horizontal or vertical arrangement of the welded body 22; or, for the transverse skeleton structure, the welded bodies 22 on both sides are arranged vertically, That is, adjust the welding bodies 22 on both sides to be located on the left and right sides of the pillar, so as to avoid the influence of the weld seam on the effect of lateral stress transfer, so as to ensure the effect of lateral stress transfer on the pillar; The body 22 is located on both sides of the front and back of the pillar, so as to prevent the welding seam from affecting the longitudinal stress transfer effect, so as to ensure the longitudinal stress transfer effect of the pillar.

When the outer tube 20 of the pillar includes four arc-shaped tube sheets 21, the pillar includes four welds, which can be adjusted to form 45 degrees with the transverse direction of the ship and the longitudinal direction of the ship. In order to reliably transmit the stress of the upper and lower decks through the arc tube plate 21.

In other words, the configuration of the outer tube 20 of the double-walled circular tube strut to include two or four arc-shaped tube plates 21 has a better effect, which is convenient for adjusting the angle of the strut according to the transverse and longitudinal components on the deck of the ship, and ensures the reliable transmission of the strut stress, avoid stress concentration, and ensure the strength of the pillar structure.

In one embodiment, the inner wall of the arc-shaped tube plate 21 of the outer tube 20 abuts against the inner tube 10, so as to ensure that the inner tube 10 and the arc-shaped tube plate 21 can transmit force through contact, ensure that the overall force of the pillar is uniform, and improve Pillar structural strength, bending performance.

In Fig. 1, the first half pipe and the second half pipe are symmetrical with respect to the central axis of the inner pipe 10, in other words, the two arc-shaped tube plates 21 are symmetrical with respect to the central axis of the inner pipe 10, thereby ensuring the symmetry of the two welds, thus ensuring the support The force is symmetrical. Moreover, the inner wall of the first half pipe abuts against the outer wall of the inner pipe 10, and the inner wall of the second half pipe abuts against the outer wall of the inner pipe 10, so as to ensure that between the first half pipe and the inner pipe 10, the second half pipe and the inner pipe Transmission of internal forces between tubes 10.

In one embodiment, the outer tube 20 includes a first half tube and a second half tube symmetrically arranged. In order to strengthen the connection strength between the two half pipes and the inner pipe 10, plug welding holes are spaced along the length direction at the middle position of the first half pipe for plug welding, and correspondingly, at the middle position of the second half pipe along the length direction Space the plug holes for plug welding. When two half pipes are arranged on the left and right sides of the inner pipe 10, plug welding holes are arranged at intervals along the length direction on the left and right sides of the pillar, and the welding material is filled in the plug welding holes to realize the welding and fixing between the half pipe and the inner pipe 10. Pipe seams 41 between the half pipes are formed on the front and rear sides of the pillar, and the pipe seams 41 are filled with welding material to realize welding and fixing between the half pipes and between the half pipes and the inner pipe 10 . In this way, in the pillar of the present invention, both sides of the half pipe and the middle of the half pipe can be welded and fixed to the inner pipe 10 , and the overall structural strength of the pillar is high.

It should be noted that the half pipe is the arc-shaped tube plate 21 .

In one embodiment, plug welding holes are provided in the area between the 1/4 position and the 3/4 position of the length dimension of the first half pipe and the second half pipe, avoiding setting plug welding holes near the end of the half pipe, and When installed between the upper and lower decks, ensure the integrity and integrity of the part of the arc-shaped tube plate 21 close to the deck, and ensure the structural strength.

In one embodiment, in order to facilitate manufacturing and processing, when cutting the large round tube 40 , a welding bevel is cut at the same time, in other words, a bevel is formed between two adjacent arc-shaped tube plates 21 . In this way, when the pillar includes two arc-shaped tube plates 21, the two arc-shaped tube plates 21 are arranged on opposite sides of the first symmetrical plane of the pillar, and the circumferential side walls of the arc-shaped tube plate 21 are inclined relative to the first symmetrical plane . When cutting the large round pipe 40, four cuts are carried out (the position indicated by the arrow in the figure is the cutting position), and a cut is completed every two cuts, and an oblique cut is carried out during each cut to cover the two half pipes inside After the outside of the tube 10, a weld bevel is formed between the inclined tube side walls of the two half-pipes to facilitate welding. The welding groove is the pipe seam 41, and the two side walls of the pipe seam 41 are inclined.

In one embodiment, the end surface of the arc-shaped tube plate 21 in the length direction is flush with the end surface of the inner tube 10 in the length direction. In this way, when the outer tube 20 and the inner tube 10 of the pillar are installed between the upper and lower decks, the ends of the arc-shaped tube plate 21 of the pillar and the end of the inner tube 10 can contact and connect the upper and lower decks, and the arc-shaped tube of the pillar The plate 21 and the inner tube 10 can evenly receive the stress transmitted by the deck, avoiding the direct stress of the single inner tube 10 or the outer tube 20, and ensuring the structural strength of the pillar.

Please refer to FIG. 1 to FIG. 9 , a method for manufacturing a double-walled circular tube strut is provided below, which is used to manufacture the strut in any of the aforementioned embodiments.

The manufacturing method of the double-wall circular tube pillar includes a preparation step, a cutting step and a welding step.

Preparation step: prepare two kinds of hollow circular tubes with different diameters, the outer diameter of the small circular tube 30 is d1, the inner diameter of the large circular tube 40 is d2, d1=d2, or d1 is slightly smaller than d2. Wherein, the small round tube 30 is used for the inner tube 10 as a double-walled round tube support, and the large round tube 40 is used for the outer tube 20 as a double-walled round tube support.

Cutting step: performing multiple cuts along the length direction of the large round tube 40 to form multiple arc-shaped tube plates 21 .

Welding step: When a plurality of arc-shaped tube plates 21 surround the outer wall of the small round tube 30, welding is performed at the pipe seam 41 between adjacent arc-shaped tube plates 21 to form a double-walled round tube pillar; the small round tube 30 For the inner tube 10 , a plurality of arc-shaped tube plates 21 are welded to form the outer tube 20 .

Wherein, the inner diameter of the large round pipe 40 is larger than the outer diameter of the small round pipe 30, and d1=d2, or d1 is slightly smaller than d2, the inner wall radian of the arc-shaped tube plate 21 formed after the large round pipe 40 is cut is suitable for the outer wall radian of the small round pipe 30 Matching, the arc-shaped tube plate 21 can be directly assembled on the outside of the small round tube 30. In this way, there is no need to specially purchase flat materials for bending and bending processing as the arc-shaped tube plate 21 for assembling on the outside of the small round tube 30 , which is convenient for material procurement and manufacturing.

In the welding step, when welding at the pipe seam 41 of the arc-shaped tube plate 21, the three sides of the solid welded body 22 formed by the welding material are respectively fixed to the side walls of the arc-shaped tube plate 21 on both sides and the outer wall of the inner tube 10, and one-time welding realizes The fixing of the three components has high efficiency, good stability and good integrity.

In one embodiment, the manufacturing method further includes an assembling step. The preparation step, the cutting step, the assembling step, and the welding step are performed in sequence. It should be noted that the sequence of several steps refers to the relative sequence of these steps. For example, when other steps are included between the cutting step and the assembling step, it also belongs to the sequentially performing the cutting step and the assembling step. scope. The specific details of the assembling step and the welding step are described below.

Assembly step: install a plurality of arc-shaped tube plates 21 at intervals along the circumference of the inner tube 10 , and keep tube seams 41 between adjacent arc-shaped tube plates 21 .

Welding step: at the position of the pipe seam 41, weld along the length direction of the inner pipe 10 to form a welded body at the pipe seam 41 for fixing the adjacent arc-shaped tube plate 21 and for fixing the arc-shaped tube plate 21 and the inner pipe 10 twenty two. In other words, the first side of the welded body 22 is fixed to the side wall of the arc-shaped tube plate 21 on one side, the second side of the welded body 22 is fixed to the outer wall of the inner tube 10 (small round tube 30 ), and the third side of the welded body 22 It is fixed with the side wall of the arc tube plate 21 on the other side.

In other embodiments, it is also possible to insert the small round tube 30 directly into the inside of the large round tube 40 before cutting the large round tube 40, and then perform the step of cutting the large round tube 40. Welding is performed between the tube sheets 21 .

For the convenience of description, the manufacturing method of inserting the small round tube 30 into the inside of the large round tube 40, and then performing the cutting step and the assembly step is called the first assembly and then the cutting method. 21 is contained in small round tube 30 outsides), the manufacturing method of welding step is called the assembly method after first cutting.

Among them, if the small round tube 30 is inserted into the large round tube 40 before cutting, it can be inserted through manual alignment, but there are problems such as high difficulty in alignment, large frictional resistance during the insertion process, and easy damage to the pipe fittings. 40 small round pipe 30 has high size requirements, and the tolerance rate for pipe fittings is low. Compared with the method of assembling first and then cutting, the cutting first and then assembling method, the arc-shaped tube plate 21 after cutting can be directly placed on the outside of the small round tube 30, the assembly requirements are low, it is easier to realize, and it is more suitable for the assembly process through auxiliary equipment, which improves the manufacturing efficiency. efficiency.

In one embodiment, the manufacturing method further includes a pipetting step. The preparation step S100, the cutting step S200, the pipe transfer step S300, the assembling step S400, and the welding step S500 are performed in sequence. The cutting step, pipetting step and assembling step are described in more detail below.

The cutting steps include:

Place the large round tube 40 in the arc-shaped groove 501 of the support frame 50, and the upper part of the large round tube 40 is exposed above the support frame 50;

Cut one side of the large round pipe 40, and cut the first pipe seam 41 on one side of the large round pipe 40;

The large round tube 40 in the support frame 50 is turned over 180 degrees, the other side of the large round tube 40 is cut, and the second tube seam 41 is cut on one side of the large round tube 40, and the large round tube 40 is cut into two arc-shaped tube sheets 21;

Wherein, the support frame 50 used in the cutting step includes two detachable half-frame bodies 51, each half-frame body 51 includes a groove portion 502, each groove portion 502 is half of the arc groove 501, and the two half-frame bodies 51 When the frames 51 are merged to form the support frame 50 as a whole, the two grooves 502 are connected to form an arc-shaped groove 501 with an upper opening.

Transfer steps include:

After cutting the large round tube 40 into two arc-shaped tube plates 21, move the half-frame body 51 to separate the two half-frame bodies 51 so that the two arc-shaped tube plates 21 are separated;

Move the small round tube 30 between the first tire frame and the second tire frame;

Move the half-frame body 51 to make the two half-frame bodies 51 close to each other, so that the two arc-shaped tube plates 21 are fitted on the left and right sides of the small round tube 30 respectively.

In the manufacturing method of the present invention, the large round pipe 40 is supported by a support frame 50 that can be moved, opened and combined. Fix by buckle fixing, lock fixing, etc., so as to provide stable support for the large round pipe 40 to be cut.

After completing the cutting of the large round tube 40, the large round tube 40 is cut into two symmetrical arc-shaped tube sheets 21, and then the connection between the two half-frame bodies 51 is released, and the two half-frames are driven by a driving device or manually pushed. Body 51 separates, and when separating, stop piece can be set in half frame body 51 inner side or by modes such as artificial support, stop the arc tube plate 21 that is cut to come off from the inboard of half frame body 51 and fall out. After the two half-frames 51 are separated, a tube-releasing gap is formed between the two arc-shaped tube sheets 21 and the two half-frames 51, which is convenient for moving the small round tube 30 to the tube-releasing gap before merging the two half-frames. Frame body 51.

Wherein, the blocking member arranged on the inner side of the half-frame body 51 can be configured as a controllable lifting blocking member. When the two half-frame bodies 51 are merged, when the blocking member touches the small round tube 30, the blocking member automatically descends. To avoid the position, it is convenient for the arc-shaped tube plate 21 to be sleeved on the outside of the small round tube 30 .

In the manufacturing method of the present invention, by adopting the support frame 50 that can be separated and merged by two half-frame bodies 51 as the tire frame for supporting the large round tube 40, it is convenient to realize the assembly of the arc-shaped tube plate 21 and the small round tube 30. Compared with The method of manually moving the arc-shaped tube plate 21 to the outside of the small round tube 30 after cutting the large round tube 40 is more convenient and suitable for mechanized manufacturing. Moreover, after the two half-frame bodies 51 are merged, the assembly of the small round tube 30 between the two arc-shaped tube plates 21 can be realized, and the two half-frame bodies 51 are then fixed to form a support frame 50, and the support frame 50 immediately A welding support table is available to facilitate subsequent welding steps.

The manufacturing method of the invention has reasonable flow and high manufacturing efficiency.

In one embodiment, in the pipetting step, as shown in FIG. 8 , a pipe support 60 may be used for pipetting. The pipe support 60 has a bent shape. The pipe support 60 includes a connected horizontal frame and a vertical frame. One end of the horizontal frame is suspended in the air, and a slider is provided at the bottom of the vertical frame. The slider is installed on the sky-side guide rail or the ground-side guide rail. The pipe support 60 is disposed on one side of the support frame 50 in the lengthwise direction.

In the pipe transfer step, the small round tube 30 is placed on the horizontal frame, and then the tube support 60 is driven to move along the guide rail by a linear drive device, and the small round tube 30 is moved to the two arc-shaped tube plates 21 and the two half frame bodies. 51, then the two half frame bodies 51 merge, so that the two arc-shaped tube plates 21 are enclosed within the small round tube 30 left and right sides. Since the horizontal frame is located inside the small circular tube 30 and parallel to the arc-shaped tube plate 21 , the horizontal frame of the tube support 60 does not interfere with the assembly and/or welding between the arc-shaped tube plate 21 and the small circular tube 30 .

In one embodiment, in the pipe transfer step, a linear driving device drives one half frame body 51 to move laterally along the sky side guide rail or the ground side guide rail, so as to merge or separate the two half frame bodies 51 . The transfer step is realized through automation or semi-automation of mechanical equipment, and the manufacturing efficiency is higher.

In the description herein, it should be understood that the terms "up", "down", "left", "right" and other orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of description and Simplification of operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

In the description of this specification, a description referring to the terms "an embodiment", "an example" and the like means that a specific feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention middle. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only includes an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

The above describes the technical principles of the present invention in conjunction with specific embodiments. These descriptions are only for explaining the principles of the present invention, and cannot be construed as limiting the protection scope of the present invention in any way. Based on the explanations herein, those skilled in the art can think of other specific implementation modes of the present invention without creative efforts, and these modes will all fall within the protection scope of the present invention.

Claims (10)

1. A double-walled circular tube strut, characterized by comprising an inner tube (10) and an outer tube (20);

the inner tube (10) is a hollow circular tube; the outer tube (20) comprises a plurality of arc tube plates (21), and the plurality of arc tube plates (21) are surrounded on the outer part of the inner tube (10); a pipe seam (41) is formed between the adjacent arc-shaped pipe plates (21), a welding body (22) is arranged in the pipe seam (41), and the arc-shaped pipe plates (21) and the inner pipe (10) are fixed through the welding body (22).

2. The double-walled circular tube strut according to claim 1, characterized in that the outer tube (20) comprises two of the arc tube sheets (21), the two arc tube sheets (21) comprising a first half tube and a second half tube; one side of the first half pipe and the second half pipe are fixed through a first welding body (22), and the other side of the first half pipe and the second half pipe are fixed through a second welding body (22).

3. The double-walled circular tube strut according to claim 1, characterized in that the number of arc tube plates (21) in the outer tube (20) is two or four.

4. The double-walled circular tube strut according to claim 2, characterized in that the first half tube and the second half tube are symmetrical about the central axis of the inner tube (10), the inner wall of the first half tube abutting the outer wall of the inner tube (10), the inner wall of the second half tube abutting the outer wall of the inner tube (10).

5. A double-walled circular tube strut according to claim 2, characterized in that the end surfaces in the length direction of the arc tube plates (21) are flush with the end surfaces in the length direction of the inner tube (10).

6. A method of manufacturing a double-walled tubular strut, for manufacturing a strut as claimed in any one of claims 1 to 5; the manufacturing method of the double-wall round pipe strut comprises the following steps:

cutting: cutting along the length direction of the large round tube (40) to form a plurality of arc tube plates (21);

and (3) welding: the arc tube plates (21) are circumferentially surrounded on the outer part of the small round tube (30) along the circumference of the small round tube (30), and welding is carried out at a tube seam (41) between the adjacent arc tube plates (21) to form the double-wall round tube pillar; the small round tube (30) is the inner tube (10), and the outer tube (20) is formed after a plurality of arc tube plates (21) are welded.

7. The method of manufacturing a double-walled tubular strut of claim 6, further comprising an assembly step performed between the cutting step and the welding step;

the assembling step comprises the following steps: -mounting a plurality of said arc tube plates (21) at intervals along the circumference of said inner tube (10), with a tube gap (41) remaining between adjacent ones of said arc tube plates (21);

the welding step comprises the following steps: and welding is performed along the length direction of the inner tube (10) at the position of the tube seam (41) so as to form a welding body (22) for fixing the adjacent arc-shaped tube plate (21) and fixing the arc-shaped tube plate (21) and the inner tube (10) at the tube seam (41).

8. The method of manufacturing a double-walled tubular strut of claim 7, wherein in the cutting step, the large tubular (40) is cut to form two symmetrical arcuate tube sheets (21).

9. The method of manufacturing a double-walled tubular strut of claim 8, wherein in the cutting step:

the large round tube (40) is placed in an arc-shaped groove (501) of the supporting frame (50), and the upper part of the large round tube (40) is exposed from the upper part of the supporting frame (50);

cutting one side of the large circular tube (40), and cutting a first tube seam (41) on one side of the large circular tube (40);

turning over the large round tube (40) in the supporting frame (50) for 180 degrees, cutting the other side of the large round tube (40), cutting a second tube slit (41) on one side of the large round tube (40), and cutting the large round tube (40) into two arc tube plates (21).

10. The method of manufacturing a double-walled tubular strut of claim 9, further comprising a tube moving step; the tube moving step is performed between the cutting step and the assembling step;

in the cutting step:

the used support frame (50) comprises two half frame bodies (51), the two half frame bodies (51) can move away from each other or approach each other, each half frame body (51) comprises a half groove, and the arc-shaped grooves (501) are formed when the two half frame bodies (51) are combined;

in the tube moving step:

after the large round tube (40) is cut into two arc tube plates (21), the half frame bodies (51) are moved so as to separate the two half frame bodies (51), and the two arc tube plates (21) are separated;

moving the small round tube (30) between the two half frame bodies (51);

and moving the half frame bodies (51) to enable the two half frame bodies (51) to approach each other, and enabling the two arc tube plates (21) to be respectively sleeved on the left side and the right side of the small round tube (30).