CN114453840A - Processing method of floor slab layer connection structure - Google Patents
Processing method of floor slab layer connection structure Download PDFInfo
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- CN114453840A CN114453840A CN202210151461.3A CN202210151461A CN114453840A CN 114453840 A CN114453840 A CN 114453840A CN 202210151461 A CN202210151461 A CN 202210151461A CN 114453840 A CN114453840 A CN 114453840A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Abstract
The invention discloses a processing method of a floor slab layer connection structure, which comprises the following steps of S1, calculating a transition angle between a vertical edge of a bell mouth and the edge of the end part of a large pipe and the length of the large pipe for processing the bell mouth; s2, cutting the large tube for processing the bell mouth to form a processing tube, equally dividing the processing tube into four equal parts from top to bottom, and forming four 1/4 processing tubes; s3, with the cutting line of 1/8 of the processed tube as a reference line, sequentially cutting a first end face, a second end face parallel to the first end face and side faces perpendicular to the first end face and the second end face of each 1/4 processed tube, wherein the outer wall of the second end face after processing is positioned below the center line of the wall thickness of the small tube; and S4, fixedly connecting the 1/4 processing pipes to the floor steel beams. The application of the floor slab layer connecting structure can realize equal-strength connection of the large pipe and the small pipe, the processing method is simple, and the manufacturing efficiency is high.
Description
Technical Field
The invention relates to the technical field of offshore substations, in particular to a processing method of a floor slab layer connection structure.
Background
The connection structure of the offshore substation floor layer is used for connecting an upper floor layer and a lower floor layer, the upper block structure columns of the connection structure mainly adopt steel pipes, the design of the structure is required to have safety and economy, the steel pipes with different diameters and different thicknesses are generally used for connection, the variable cross-section columns are designed conventionally, the connection between the variable cross-section columns mainly adopts bell mouth transition, the bell mouths are mainly used for connecting large pipes with large sizes and small pipes with small sizes, the diameter of a large port of each bell mouth is equal to that of the large pipe, the diameter of a small port of each bell mouth is equal to that of the small pipe, and the thickness of each bell mouth is equal to that of the thick steel pipe. In the prior art, the forming of the bell mouth needs to roll and bend the steel plate, and the method has high processing difficulty and low efficiency and seriously restricts the construction of a transformer substation.
The prior art discloses a bell mouth forming method: as shown in fig. 1 and 2, the size of the bell-mouth-sized port is determined according to the diameters of the upper steel pipe and the lower steel pipe, namely, the diameter of the large port is equal to that of the large pipe, the diameter of the small port is equal to that of the small pipe, and the thickness is equal to that of the thicker steel pipe. After the steel plate is rolled and bent into the bell mouth, the bell mouth is cut into 1/4 or 1/2 bell mouth according to the connection condition of the floor beam, and then the steel plate is welded on the floor beam. This method enables rigid connection of the upper and lower main columns and is therefore the most common method of construction, but this method of manufacture varies the height of the floor slab, resulting in a flare slope (1: N in figure 2) that is not conventional 1: 4, leading to difficulties in machining the bell: and the diameters of the steel pipes at the upper end and the lower end of different main columns are varied, so that the machining of the bell mouth is further difficult.
As shown in fig. 3 and 4, the prior art also discloses a method for forming a bell mouth by arranging a plurality of toggle plates between floor beams and using contact points between the toggle plates and upper and lower steel pipes to transfer structural internal force, which can form a connection structure of a floor layer of an offshore substation without using steel plates to be rolled into the bell mouth, but the problem of internal force concentration is serious because the upper and lower steel pipes transfer structural internal force through several contact points; when the internal force of the structure is large, a great number of toggle plates are needed, the toggle plate connection can not be realized, and the equal-strength connection required by the structure can not be realized, so that the structure is only suitable for the condition of small load; and the elbow plates have large welding workload and small space between the elbow plates, which causes much inconvenience for the inspection of welding quality.
Therefore, the processing method of the connection structure of the offshore substation in the prior art has the technical problems that the processing of the equivalent bell mouth processing method is difficult and equal-strength connection cannot be realized.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a processing method of a floor slab layer connecting structure, which can solve the technical problems that: the processing method of the connection structure of the offshore substation in the prior art has the technical problems that the processing of an equivalent bell mouth processing method is difficult and equal-strength connection cannot be realized.
In order to achieve the above object, the present invention provides a method for processing a floor slab layer connection structure, comprising the steps of:
s1, calculating the transition angle between the vertical edge of the bell mouth and the end edge of the large pipe and the length of the large pipe for processing the bell mouth;
s2, cutting the large pipe for processing the bell mouth to form a processing pipe, equally dividing the processing pipe into four equal parts from top to bottom, and forming four 1/4 processing pipes;
s3, with the cut line of 1/8 of the processed pipe as a reference line, sequentially cutting a first end face, a second end face and side faces, wherein the first end face is parallel to the first end face, the side faces are perpendicular to the first end face and the second end face, each 1/4 processed pipe is connected with a large pipe, each second end face is connected with a small pipe, each side face is connected with an adjacent 1/4 processed pipe, and the outer wall of each processed second end face is located below the central line of the wall thickness of each small pipe;
and S4, fixedly connecting each 1/4 processing pipe to a floor steel beam.
Preferably, in step S1: setting the diameter of a small pipe as D, the wall thickness of the small pipe as T, the diameter of a large pipe as D, the wall thickness of the large pipe as T, the transition angle between the vertical edge of a bell mouth and the end edge of the large pipe as A, the net height of the bell mouth as H, the 1/8 cut line as L1, the central line of the wall thickness of the small pipe as L2, and the length of the processed pipe as L,
then: tan (a) ═ H/(D/2- (D-t)/2), a ═ arctan (H/(D/2- (D-t)/2);
L＝H/tan(A)+(d-t)/2*cos(A)。
preferably, in step S3:
s31, cutting 1/4 redundant materials on the side, connected with the large pipe, of the processing pipe;
s32, cutting off the redundant material in the area connected with the floor slab steel beam along the vertical direction of the sideline cut in the step S31;
s33, cutting off the excessive material on the side connected with the small tube along the vertical direction of the edge line cut in the step S32;
s34, cutting 1/4 excessive material on the last side of the processing tube
Preferably, the step of cutting 1/4 the excess material of the last lateral side of the processing tube in the step of S34 includes the steps of:
s341, copying the intersection point of the outer edge of the large pipe end projection of the 1/4 processed pipe and the 1/8 notch line to the intersection point of the small pipe end thickness center line of the 1/4 processed pipe and the 1/8 notch line by taking the intersection point as a reference, and deleting 1/4 the overlapped area of the large pipe end of the processed pipe and the structural beam;
s342, connecting the intersection point of the inner edge line of the equivalent bell mouth and the structural beam, and determining the length of the intersection point of the connecting line and the 1/8 notch line and the intersection point of the outer edge line of the equivalent bell mouth and the 1/8 notch line as the length of the fourth cutting positioning point S;
s343, based on the cutting in the steps S31, S32 and S33, a fourth cutting line is determined according to the fourth cutting positioning point S determined in the step S342.
Preferably, in step S4, when the 1/4 processed pipes are connected to the floor steel beams, the toggle plates connected to the 1/4 processed pipes are added if there is no floor steel beam.
Compared with the prior art, the invention has the beneficial effects that:
the processing method of the floor slab layer connection structure provided by the invention is used for cutting out a part of large pipe with a certain length for processing the bell mouth, firstly, the length of the large pipe for processing the bell mouth is calculated by the transition angle between the vertical edge of the bell mouth and the edge of the end part of the large pipe, and the large pipe with the length forms a processing pipe; then equally cutting the processing tube into four equal parts from top to bottom to form four 1/4 processing tubes; and finally, taking a cutting line of 1/8 of the processed pipe as a reference line, sequentially cutting a first end face, a second end face and a side face, wherein the first end face is parallel to the first end face, the second end face is perpendicular to the first end face and the second end face, the first end face is used for connecting a large pipe, the second end face is used for connecting a small pipe, the side face is used for connecting an adjacent 1/4 processed pipe, the outer wall of the second end face after processing is ensured to be positioned below a central line of the wall thickness of the small pipe, equal-strength connection between the large pipe and the small pipe is realized, and finally, each 1/4 processed pipe is fixedly connected to a floor steel beam to form the floor layer connecting structure.
The floor slab layer connecting structure directly adopts the large pipe for cutting, and equal-strength connection of the large pipe and the small pipe can be realized; 1/4 processing pipes are formed by processing and are directly connected with the floor slab steel beam, and the steel plate does not need to be bent into a bell mouth; the processing method is simple and the manufacturing efficiency is high.
Drawings
Fig. 1 is a schematic front view of a floor slab joining structure according to the prior art;
FIG. 2 is a schematic view of the cross-sectional structure A-A of FIG. 1;
FIG. 3 is a schematic front view of another prior art method of forming a floor slab joining structure;
FIG. 4 is a schematic view of the cross-sectional structure A-A of FIG. 3;
FIG. 5 is a schematic top view of a floor slab joining structure of the present application;
FIG. 6 is a schematic view of the A-A structure of FIG. 5;
FIG. 7 is a schematic diagram of a cut 1/4 machined tube;
FIG. 8 is a schematic view of an 1/8 cut line for processing a tube;
FIG. 9 is a schematic illustration of a cutting step for cutting 1/4 the process tube;
fig. 10 is a schematic diagram of a first step of determining the S-cut point for the fourth cut;
FIG. 11 is a schematic diagram of the second step of determining the S-cut point for the fourth cut
FIG. 12 is a schematic view of a fourth cut;
FIG. 13 is a schematic view of a cut-finished 1/4 machined tube;
figure 14 is a structural schematic view of a connecting floor steel beam of the floor slab connection structure of the present application;
fig. 15 is a front view of fig. 14.
In the figure, 1, a large pipe; 2. a small tube; 3. and (5) processing the tube.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, which are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.
A preferred embodiment of the method of processing a floor slab joining structure of the present invention, as shown in fig. 5 to 15 in particular, comprises the steps of:
and S1, calculating a transition angle between the vertical edge of the bell mouth and the end edge of the large pipe 1 and the length of the large pipe for processing the bell mouth, wherein the transition angle is the inclined angle of the vertical edge of the connecting structure formed by the bell mouth, and the calculated angle is used for calculating the length of the large pipe to be intercepted.
Specifically, as shown in fig. 5 to 7, if the diameter of the small pipe 2 is D, the wall thickness of the small pipe is T, the diameter of the large pipe 1 is D, the wall thickness of the large pipe 1 is T, the transition angle between the vertical edge of the bell mouth and the end edge of the large pipe is a, the net height of the bell mouth is H, the 1/8 cut line is L1, the central line of the wall thickness of the small pipe is L2, and the length of the processed pipe is L: tan (a) ═ H/(D/2- (D-t)/2), a ═ arctan (H/(D/2- (D-t)/2);
l ═ H/tan (a) + (d-t)/2 × cos (a), and the length of each side of the 1/4 processed tube used to form the connection structure was calculated at the same time.
S2, cutting the large pipe for processing the bell mouth to form a processing pipe 3, equally dividing the processing pipe into four equal parts from top to bottom to form four 1/4 processing pipes, wherein 1/4 processing pipes are arc-shaped, as shown in figure 8.
S3, as shown in fig. 8, using the cut line 1/8 of the processed tube as a reference line, sequentially cutting a first end face, a second end face parallel to the first end face, and side faces perpendicular to the first end face and the second end face of each 1/4 processed tube, wherein the first end face is formed after the first cutting region is cut, the second end face is formed after the third cutting region is cut, the side faces are formed after the third cutting region is cut, the first end face is used for connecting a large tube, the second end face is used for connecting a small tube, the side faces are used for connecting adjacent 1/4 processed tubes, and the outer wall of the second end face after processing is located below the center line of the wall thickness of the small tube.
Specifically, step S3 further includes:
s31, cutting 1/4 the redundant material on the side, connected with the large pipe, of the processing pipe by taking the A-A section where the 1/8 notch line is located as a reference plane;
s32, cutting off the redundant material in the area connected with the floor slab steel beam along the vertical direction of the sideline cut in the step S31;
s33, cutting off the excessive material on the side connected with the small tube along the vertical direction of the edge line cut in the step S32;
in the specific cutting, a side edge of the first end face cut by subtracting the transition angle a from the right angle is a bottom edge, and an outward part of the bottom edge is a cut-off region, that is, a part of the 1/4 machined pipe remaining after matching the length of each side edge calculated in step S1 is cut off.
S34, as shown in fig. 10, 11 and 12, determining a fourth cutting positioning point S, which is the position of the end point of the cutting to the bottom, and the fourth cutting positioning point S can be accurately obtained by lofting the production model.
Specifically, the lofting step before the fourth cutting is as follows:
s341, as shown in FIG. 10, the point of intersection of the outer edge of the projection of the large tube end of the 1/4 processed tube and the 1/8 notch line is copied to the point of intersection of the thickness center line of the small tube end of the 1/4 processed tube and the 1/8 notch line, and the overlapping area of the large tube end of the 1/4 processed tube and the structural beam is deleted. At this time, the actual shape of the equivalent flare tube side is shown by hatching in the figure.
And S342, as shown in the figure 11, connecting the intersection point of the inner edge line of the equivalent bell mouth and the structural beam, and determining the length of the intersection point of the connecting line and the 1/8 notch line and the intersection point of the outer edge line of the equivalent bell mouth and the 1/8 notch line as the length of the fourth cutting positioning point S, as shown in the following figure.
S343, as shown in FIG. 12, based on the cutting in step S31, step S32 and step S33, a fourth cutting line is determined according to the following figure according to the fourth cutting positioning point S determined in S342.
And S4, fixedly connecting each 1/4 processing pipe to a floor steel beam.
As shown in fig. 11 and 12, when the 1/4 processing pipe and the steel plate beam are fixed by welding and the 1/4 processing pipe is connected with the floor steel beam, if the floor steel beam is not provided, the toggle plate connected with the 1/4 processing pipe is added, and the equivalent 1/4 bell mouth can be ensured to better play a role.
By adopting the processing method of the floor slab layer connection structure, the horizontal projection of the connection structure formed by the equivalent bell mouth and the horizontal projection of the small pipe are overlapped, the flange plate of the floor slab steel beam can be obtained to have the stress diffusion effect in the non-overlapped area according to the regulations of the national standard GB 50017 (similar to other national specifications), the steel structure node diffusion line can be considered to be 1/2.5, and the non-overlapped area is in the stress diffusion range of the small pipe and the equivalent bell mouth, and can be considered to be in equal-strength connection.
According to the processing method of the floor slab layer connection structure, the large pipe is directly used for cutting, and equal-strength transition connection of the large pipe and the small pipe can be achieved; 1/4 processing pipes are formed by processing and are directly connected with the floor slab steel beam, and the steel plate does not need to be bent into a bell mouth; the processing method is simple, the manufacturing efficiency is high, and the method can also be applied to other steel structure projects.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (5)
1. A method for processing a floor slab layer connecting structure is characterized by comprising the following steps:
s1, calculating the transition angle between the vertical edge of the bell mouth and the end edge of the large pipe and the length of the large pipe for processing the bell mouth;
s2, cutting the large pipe for processing the bell mouth to form a processing pipe, equally dividing the processing pipe into four equal parts from top to bottom, and forming four 1/4 processing pipes;
s3, with the cut line of 1/8 of the processed pipe as a reference line, sequentially cutting a first end face, a second end face parallel to the first end face and side faces perpendicular to the first end face and the second end face of each 1/4 processed pipe, wherein the first end face is used for connecting a large pipe, the second end face is used for connecting a small pipe, the side faces are used for connecting adjacent 1/4 processed pipes, and the outer wall of the processed second end face is positioned below the center line of the wall thickness of the small pipe;
and S4, fixedly connecting each 1/4 processing pipe to a floor steel beam.
2. A method of forming a floor slab joining structure according to claim 1, wherein in step S1: setting the diameter of a small pipe as D, the wall thickness of the small pipe as T, the diameter of a large pipe as D, the wall thickness of the large pipe as T, the transition angle between the vertical edge of a bell mouth and the end edge of the large pipe as A, the net height of the bell mouth as H, the 1/8 notch line as L1, the central line of the wall thickness of the small pipe as L2, and the length of the processed pipe as L,
then: tan (a) ═ H/(D/2- (D-t)/2), a ═ arctan (H/(D/2- (D-t)/2);
L＝H/tan(A)+(d-t)/2*cos(A)。
3. a method of forming a floor slab joining structure according to claim 1, wherein in step S3:
s31, cutting 1/4 redundant materials on the side, connected with the large pipe, of the processing pipe;
s32, cutting off the redundant material in the area connected with the floor slab steel beam along the vertical direction of the sideline cut in the step S31;
s33, cutting off the excessive material on the side connected with the small tube along the vertical direction of the edge line cut in the step S32;
s34, cutting 1/4 excess material of the last side of the process tube.
4. A method of forming a floor slab joining structure as claimed in claim 3 wherein said step S34 of cutting 1/4 excess material from the last side of the formed tube includes the steps of:
s341, copying the intersection point of the outer edge of the large pipe end projection of the 1/4 processed pipe and the 1/8 notch line to the intersection point of the small pipe end thickness center line of the 1/4 processed pipe and the 1/8 notch line by taking the intersection point as a reference, and deleting 1/4 the overlapped area of the large pipe end of the processed pipe and the structural beam;
s342, connecting the intersection point of the inner edge line of the equivalent bell mouth and the structural beam, and determining the length of the intersection point of the connecting line and the 1/8 notch line and the intersection point of the outer edge line of the equivalent bell mouth and the 1/8 notch line as the length of a fourth cutting positioning point S;
s343, based on the cutting in the steps S31, S32 and S33, a fourth cutting line is determined according to the fourth cutting positioning point S determined in the step S342.
5. The method of manufacturing a floor connecting structure according to claim 3, wherein in the step S4, when 1/4 processing pipes are connected to the floor steel beams, if there is no floor steel beam, the toggle plates connected to 1/4 processing pipes are added.
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