Horizontal installation method for machining steel structure twisted spiral staircase

Abstract

The invention provides a horizontal installation method for machining a steel structure twisted spiral stair, which belongs to the technical field of steel structure machining and manufacturing and comprises the following steps of: machining main parts and parts of a stair beam according to a design drawing; calculating the length of the ground sample according to the spiral staircase design size; measuring the height of the jig frame according to the spiral stair design size and the ground sample length; mounting a jig frame; and the ladder beams and the steps are assembled on the jig frame, and assembling is completed. According to the manufacturing method, assembling is conducted on the ground bed mould by simulating the space structure size of actual installation of the rotating type steel ladder through a horizontal installation manufacturing method, materials used for building the bed mould and operation hidden dangers caused by high-altitude operation are reduced, personnel investment is reduced, the manufacturing period is shortened, the overall size precision is ensured, and the problems prone to occurring in the manufacturing process through a traditional technology are solved.

Description

Technical Field

[0001] The invention relates to the technical field of steel structure processing and manufacturing, and in particular to a method for processing and assembling a steel structure twisted spiral staircase. Background Art

[0002] For a long time, the traditional manufacturing process of spiral staircases in the field of steel structure processing and manufacturing has been facing many difficulties. In particular, the vertical installation method requires overall layout according to the rotation diameter, requires a large amount of material as a tire frame support, requires a lot of manpower and material resources, has a long production cycle, and has a high production cost. The spiral steel ladder is a three-dimensional rotating structure, and its positioning is all spatial nodes. The operation steps are complicated, and the spatial distortion accuracy control is difficult. It is difficult to ensure the dimensional accuracy and quality of the production. Because most of the design height dimensions of the spiral staircase belong to high-altitude operations, there are also great safety hazards of high-altitude operations during the construction process. Summary of the invention

[0003] The invention provides a horizontal installation method for processing a twisted spiral staircase with a steel structure, which is used to solve the defects of processing a twisted spiral staircase with a steel structure in the prior art and realize safe installation.

[0004] The invention provides a steel structure twisted spiral staircase processing, comprising the following steps: processing ladder beam main parts and parts according to design drawings; calculating the length of the ground sample according to the design size of the spiral staircase; measuring the height of the tire frame according to the design size of the spiral staircase and the length of the ground sample; installing the tire frame; assembling the ladder beam and steps on the tire frame to complete the assembly.

[0005] According to a horizontal installation method for processing a twisted spiral staircase of a steel structure provided by the present invention, calculating the length of the ground sample according to the design size of the spiral staircase includes: projecting the spiral staircase on a horizontal plane to obtain a horizontal chord length; and calculating the length of the ground sample according to the horizontal chord length and the stair height.

[0006] According to a horizontal installation method for processing a twisted spiral staircase of a steel structure provided by the present invention, measuring the height of the tire frame according to the design size of the spiral staircase and the length of the ground sample includes: after projection, marking a equal-division points on the horizontal chord length; measuring the vertical distance between the inner edge of the spiral staircase projection and the equal-division points, which is the height of the tire frame.

[0007] According to a method for horizontal installation of a twisted and spiral staircase of a steel structure provided by the present invention, installing a tire frame includes: marking b equally divided points on a ground sample as tire frame positioning points; and installing and fixing the tire frame at the tire frame positioning points according to the measured height of the tire frame.

[0008] According to a horizontal installation method for processing a twisted spiral staircase of a steel structure provided by the present invention, the number of equally divided points marked on the ground sample is the same as the number of equally divided points marked on the horizontal chord length, that is, a=b.

[0009] According to a horizontal installation method for processing a twisted and rotating steel staircase provided by the present invention, a fixed tire frame is installed at a tire frame positioning point according to the measured tire frame height, including: the positioning angle of the tire frame is the same as the elevation angle of the stairs, and the tire frame is vertically welded firmly according to the tire frame positioning point.

[0010] According to a method for horizontal installation of a twisted and spiral staircase with a steel structure provided by the present invention, ladder beams and treads are assembled on a frame, and the assembly is completed by: placing an inner arc ladder beam on the frame; adjusting the inner arc ladder beam so that it is completely fitted with the frame; positioning welding the tread to the inner arc of the ladder beam; and placing the outer arc of the ladder beam on the other end of the step for welding.

[0011] According to a horizontal installation method for processing a twisted spiral staircase of a steel structure provided by the present invention, the number of equally divided points a and b is 6-10.

[0012] According to a horizontal installation method for processing a twisted spiral staircase of a steel structure provided by the present invention, support materials of the same height that can support the weight of the staircase are selected according to the height size of each tire frame support point.

[0013] According to a horizontal installation method for processing a twisted spiral staircase of a steel structure provided by the present invention, flame heating is used for fine adjustment so that the staircase is completely fitted with each supporting point of the frame.

[0014] The horizontal installation method for processing a twisted spiral staircase of a steel structure provided by the present invention simulates the spatial structural dimensions of the actual installation of the spiral steel ladder through the horizontal installation manufacturing method and assembles the stairs on the ground tread plate, thereby reducing the materials used for treading and the hidden dangers of operation caused by high-altitude operation, reducing the input of personnel and the manufacturing cycle, ensuring the overall dimensional accuracy, and solving the problems that are prone to occur when manufacturing using traditional technologies. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 It is a schematic diagram of the process of the horizontal installation method of the steel structure twisted spiral staircase provided by the present invention; Figure 2 is a front view of the spiral staircase method provided by the present invention; Figure 3 It is a projection diagram of a spiral staircase provided by the present invention; Figure 4 It is a schematic diagram of land sample calculation provided by the present invention; Figure 5 This is one of the schematic diagrams for installing a spiral staircase provided by the present invention; Figure 6 This is the second schematic diagram of installing a spiral staircase provided by the present invention; Figure 7 This is the third schematic diagram of installing a spiral staircase provided by the present invention.

[0017] Reference numerals: 10. Horizontal chord length; 20. Length of ground sample; 30. Tire frame height; 40. Ladder height; 100, tire frame; 200, inner arc of ladder beam; 300, step; 400, outer arc of ladder beam. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0020] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the direction and position of the device when it is normally placed. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0021] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0022] The present invention provides a method for horizontal installation of a twisted spiral staircase with a steel structure, see Figure 1 , including the following steps: Step 1: Process the ladder beam main body and parts according to the design drawings.

[0023] According to the structural form and spatial shape of the spiral ladder, it can be projected onto a cylinder with a certain radius. The ladder beam main body and parts are laid out and cut according to the required processing part drawing size. Since the overall line shape of the spiral ladder is mainly determined by the ladder beam, the ladder beam manufacturing process and arc rolling accuracy are the key to ensure the final forming of the spiral ladder. At the same time, the step 300 material and geometric dimensions given in the drawing are processed into suitable unit components.

[0024] Step 2: See Figure 2-4 , calculate the ground sample length 20 according to the design dimensions of the spiral staircase.

[0025] Project the spiral staircase on the horizontal plane to get the horizontal chord length 10; calculate the ground sample length 20 through the horizontal chord length 10 and the ladder height 40. The longitudinal tangent line of the spiral ascending surface of the spiral staircase is always perpendicular to the ground, and the step 300 is always parallel to the ground. The trajectory of the rotating line is simulated in three-dimensional space, that is, the shape of the inner arc 200 of the ladder beam. Combined with the known radius given in the drawing, the vertical height from the lowest point to the highest point is measured. The chord length of the inner arc ladder beam can be directly measured with CAD. According to the Pythagorean theorem, the oblique length of the rotating ascending vertical surface can be calculated, and the oblique length is the horizontal installation lofting length.

[0026] Exemplarily, let the horizontal chord length 10 be a right angle side, and the ladder height 40 be another right angle side, and the actual chord length of the oblique line is the length of the ground sample.

[0027] Step 3: Measure the height 30 of the staircase frame according to the design dimensions of the spiral staircase and the length 20 of the ground sample.

[0028] After projection, mark a equal-division points on the horizontal chord length 10; measure the vertical distance between the inner edge of the spiral staircase projection and the equal-division points, which is the tire frame height 30.

[0029] For example, draw the chord length horizontally and divide it into 8 equal parts, measure the height h1, h2, h3, h4 of each part, and the height of each point is the arch height of the rotation radius.

[0030] Step 4: See Figure 5 , install tire frame 100.

[0031] Mark b equally divided points on the ground sample as positioning points of the tire frame 100; and install and fix the tire frame 100 at the positioning points of the tire frame 100 according to the measured tire frame height 30.

[0032] The number of equally divided points marked on the ground sample is the same as the number of equally divided points marked on the horizontal chord length 10, that is, a=b, and the number of equally divided points a and b is 6-10. In this embodiment, the number of equally divided points is 8.

[0033] The height dimension of each support point of the tire frame 100 is selected from the same height support material that can support the weight of the stairs. The positioning angle of the tire frame 100 is the same as the elevation angle of the stairs. The tire frame 100 is welded vertically and firmly according to the positioning point of the tire frame. The tire frame 100 is welded vertically and firmly according to the positioning point. Check whether the height dimension data of each support point is consistent, and the layout of the tire frame 100 can be completed.

[0034] Step 5: See Figure 5-7 , assemble the ladder beam and the step 300 on the tire frame 100 to complete the assembly.

[0035] Place the inner arc ladder beam on the tire frame 100; adjust the inner arc ladder beam to make it completely fit with the tire frame 100; position weld the step 300 to the inner arc of the ladder beam 200; place the outer arc of the ladder beam 400 to the other end of the step 300 for welding.

[0036] The ladder beam is rolled by three rollers according to the rotation radius size given by the workpiece. During rolling, the roller axis is perpendicular to the ladder beam plate. According to the ascending inclination angle, any end of the ladder beam is parallel to the roller axis. The ladder beam can be initially formed by rolling a spiral line with a cylindrical design radius R. In the subsequent assembly process, the flame fine-tuning is performed in combination with the fit of the tire frame 100. The inner arc ladder beam that is initially formed by rolling arc is placed on the tire frame 100 to check whether it matches the length 20 of the ground sample. For the inappropriate position, flame heating fine-tuning can be used to make it completely fit with each support point of the tire frame 100. According to the designed height of the step 300, the step 300 positioning line is drawn, and the step 300 and the inner arc 200 of the ladder beam are positioned, assembled and spot welded one by one. Finally, the outer arc 400 of the ladder beam is placed on the other end of the step 300. In the same step, check whether each step 300 fits tightly with the outer arc curvature, and the assembly of the rotating ladder is completed.

[0037] The spiral staircase described in the present invention adopts an integrated assembly method, and the processed steel ladder parts are placed on the tire frame 100 according to the installation size for assembly, and the inner and outer contour dimensions of each component are adjusted to coincide with the horizontal projection contour through the plumb line. After the positioning is adjusted, spot welding is performed to fix it, and the overall size is finally measured and positioned. This method simulates the spatial structural dimensions of the actual installation of the spiral steel ladder and assembles it on the ground tire plate, which reduces the safety risks brought by high-altitude operations, greatly improves the operability on the ground, and has good manufacturing accuracy and molding effect of the steel ladder. The required personnel, large equipment and site occupation are relatively small, and spiral steel ladders of the same radius can be mass-produced, with high production efficiency.

[0038] The present invention uses CAD software to use a graphical method to find out the required height of the inner curved arc horizontal installation, and provides a rotating ladder horizontal drawing to be processed according to the drawing to draw the required chord length and the corresponding equal divisions, and then uses CAD to directly measure the height of each equal division. Let the horizontal chord length 10 be a right angle side, the ladder height 40 be another right angle side, and the actual length of the oblique line is the ground sample length 20 required for horizontal installation, and then the tire plate can be used as a tire to directly produce it on the ground plane without the need for high-altitude operations.

[0039] Draw a parallel line of ladder height 40 at each equally divided point of horizontal chord length 10 using CAD software, and you can get the intersection line segment of the parallel line and horizontal chord length 10, which is the spacing distance of the inner arc support of the steel ladder. Draw the heights h1, h2, h3, and h4 at the corresponding positions of the oblique line intersections, which are the ground sample support heights, and connect them to get the actual curved arc. Take some edge materials and corner materials that can meet the weight and strength of the steel ladder as support, which is convenient to obtain.

[0040] When positioning and assembling the ground support, be sure to keep it vertical to the horizontal direction of step 300, and use the height difference of the support to form a natural twist.

[0041] Use CAD software to measure the arc length of the ladder beam directly in the construction drawing. Let the arc length be a right angle side, the ladder height 40 be another right angle side, and the hypotenuse is the unfolded length. Use the roll making equipment to roll out the required arc of the ladder beam, and the horizontal plane of the step 300 is parallel to the roller during rolling. Reduce the waste of materials and time costs caused by flame arcing, and the arc size is different. Mechanical rolling has uniform arc, easy operation and high efficiency.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for horizontal installation of a twisted spiral staircase with a steel structure, characterized in that: The following steps are involved: Process ladder beams and parts according to design drawings; Calculate the length of the ground sample according to the design dimensions of the spiral staircase; Measure the height of the tire frame according to the design size of the spiral staircase and the length of the ground sample; Install the tire frame; Assemble the ladder beams and steps on the tire frame to complete the assembly.

2. The horizontal installation method for a twisted spiral staircase with a steel structure according to claim 1 is characterized in that: Calculation of the ground sample length based on the design dimensions of the spiral staircase includes: Project the spiral staircase on the horizontal plane to obtain the horizontal chord length; The length of the ground sample is calculated by the horizontal chord length and the ladder height.

3. The horizontal installation method for a twisted spiral staircase of a steel structure according to claim 2 is characterized in that Measuring the height of the tire frame according to the design size of the spiral staircase and the length of the ground sample includes: After projection, mark a equal points on the horizontal chord length; Measure the vertical distance between the inner edge of the spiral staircase projection and the equal division point, which is the height of the staircase.

4. The horizontal installation method for a twisted spiral staircase of a steel structure according to claim 3 is characterized in that: Installing the tire frame includes: Mark b equally divided points on the ground sample as tire frame positioning points; Install the fixed tire frame at the tire frame positioning point according to the measured tire frame height.

5. The horizontal installation method for a twisted spiral staircase of a steel structure according to claim 4 is characterized in that: The number of equally divided points marked on the ground sample is the same as the number of equally divided points marked on the horizontal chord length, that is, a=b.

6. The horizontal installation method for a twisted spiral staircase of a steel structure according to claim 5 is characterized in that: Installing the fixed tire frame at the tire frame positioning point according to the measured tire frame height includes: The positioning angle of the tire frame is the same as the elevation angle of the stairs, and the tire frame is welded vertically and firmly according to the tire frame positioning point.

7. The horizontal installation method for a twisted spiral staircase of a steel structure according to claim 6 is characterized in that: Assemble the ladder beams and steps on the tire frame, and complete the assembly including: Place the inner arc ladder beam on the tire frame; Adjust the inner arc ladder beam to make it fit perfectly with the tire frame; Position and weld the steps and the inner arc of the ladder beam; Place the outer arc of the ladder beam to the other end of the step for welding.

8. The horizontal installation method for a twisted spiral staircase with a steel structure according to claim 5 is characterized in that: The number of equally divided points a and b is 6-10.

9. The horizontal installation method for a twisted spiral staircase of a steel structure according to claim 6, characterized in that: According to the height dimension of each tire frame support point, select the same height support material that can support the weight of the stairs.

10. The horizontal installation method for a twisted spiral staircase of a steel structure according to claim 7, characterized in that: Use flame heating to fine-tune it so that it fits perfectly with the supporting points of the tire frame.

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