Device and method for butt joint of round pipe and elbow

Abstract

The invention provides a round pipe and elbow butt joint device and method.The round pipe and elbow butt joint device comprises two round pipes and two elbow simulators, each elbow simulator comprises a primary rotating body and a secondary rotating body, and the primary rotating bodies and the secondary rotating bodies are cuboid flat plates with the same size; one end of the primary rotating body and one end of the secondary rotating body are rotationally connected through a pin shaft, the sides, close to the circular pipe, of the primary rotating body and the secondary rotating body are tangent planes of the primary rotating body and the secondary rotating body, and the planes where the tangent planes are located pass through the center of the pin shaft; the other end of the primary rotating body is connected with the circular pipe through a fixing assembly, scales are arranged on the side wall of the primary rotating body, and the two secondary rotating bodies are connected through a connecting assembly. The butt joint process of the elbow and the round pipe can be simulated, the butt joint condition can be visually displayed, the elbow machining scheme can be rapidly determined according to the simulation result, and the period from design to machining is shortened; complex calculation is not needed, calculation errors and dependence on high-skill calculation personnel are reduced, and the docking precision is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of butt joint between elbows and circular pipe nozzles, and particularly relates to a device and method for butt joint between a circular pipe and an elbow. Background Art

[0002] Elbow bisecting plane: Generally refers to the plane passing through the central axis of the elbow and equally dividing the cross-section (circular) of the elbow into two semi-circles. Bend radius of the elbow: Generally refers to the sum of the elbow radius and the pipe radius. In engineering design, the bisecting plane is an important reference plane for determining the installation direction, connection position of the elbow and for coordinating with other circular pipes or equipment. Designers can determine the overall layout and orientation of the circular pipe system based on the bisecting plane to ensure the accuracy and tightness of the circular pipe connection.

[0003] In manufacturing and processing, the bisecting plane is an important reference for processing elbows. During the pipe bending process, manufacturers need to control parameters such as the bending angle (the angle of the elbow is generally 45° and 90°) and the curvature radius of the elbow based on the bisecting plane to ensure the dimensional accuracy and shape accuracy of the elbow, making it meet the design requirements.

[0004] For the butt joint between the normal section of the circular pipe and the normal section of the elbow, it is necessary to satisfy that the central axis of the circular pipe is perpendicular to the curvature central axis of the elbow and perpendicular to the elbow radius. Therefore, in the traditional pipe fitting processing, usually with the curvature central axis of the elbow as the rotation axis and the bending radius of the elbow as the baseline, a vertical axis is made on the elbow bisecting plane, and the direction of the vertical axis is the orientation and position of the circular pipe. Currently, pipe fitters generally adopt the method of measuring data and drawing calculations for the butt joint between elbows and circular pipes. During this process, there are problems such as a large number of measurement data, measurement errors, large calculation amounts, and time and energy consumption. At the same time, due to the large calculation difficulty, high requirements are imposed on the staff, relying on highly skilled calculation personnel. Summary of the Invention

[0005] Aiming at the problems of the prior art, the purpose of the present invention is to provide a device and method for butt joint between a circular pipe and an elbow, thereby simulating the butt joint process between the elbow and the circular pipe, reducing the calculation error and processing difficulty in the pipe fitting processing, and reducing the dependence on highly skilled calculation personnel.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0007] On the one hand, the present invention provides a device for docking a circular pipe with an elbow, which includes two circular pipes and two elbow simulators. The elbow simulator includes a mother rotating body and a son rotating body. The mother rotating body and the son rotating body are rectangular flat plates with the same size. One end of the mother rotating body and the son rotating body is rotationally connected by a pin shaft, and the sides of the mother rotating body and the son rotating body close to the circular pipe are the normal sections of the two. The planes where the normal sections are located all pass through the center of the pin shaft. The other end of the mother rotating body is connected to the circular pipe through a fixing component, and a scale is arranged on the side wall of the mother rotating body. The two son rotating bodies are connected through a connecting component.

[0008] Further, the fixing component includes a circular pipe central axis positioner and a first slider, and the connecting component includes a second slider and a rubber rope;

[0009] The circular pipe central axis positioner is fixed inside the circular pipe, and the end of the positioning central axis is connected to the first slider. The first slider is slidably installed inside the mother rotating body through a first slide rail; one end of the second slider is vertically installed at the other end of the son rotating body through a second slide rail, and the other end of the second slider protrudes from the surface of the son rotating body.

[0010] Further, a first positioning hole adapted to the positioning central axis is arranged at the center of the first slider, and the positioning central axis is connected to the first slider through the first positioning hole.

[0011] Further, the first slide rails are arranged on both sides of the mother rotating body, and a locking device is arranged on the first slide rails.

[0012] Further, the inside of the second slider is hollow, and a second positioning hole is arranged at one end of the second slider close to the son rotating body, and four positioning angles pointing to the central bull's-eye are arranged on the inner side wall at the other end.

[0013] A method for docking a circular pipe with an elbow, which is realized based on the above device for docking a circular pipe with an elbow, includes the following steps:

[0014] Step S1, installing a double-sided elbow simulator: Install the circular pipe central axis positioners in the two circular pipes respectively, so that the positioning central axis coincides with the central axis of the circular pipe; Pass the positioning central axis of the circular pipe central axis positioner through the first positioning hole, so that the end face of the circular pipe fits the normal section of the mother rotating body; Adjust the positions of the first slider and the second slider so that the distances between the centers of the first positioning hole and the second positioning hole and the pin shaft are both equal to the bending radius of the elbow.

[0015] Step S2, device connection: Take a rubber rope and connect thin ropes to both ends thereof respectively; Pass the ends of the two thin ropes through between the positioning angles of the two second sliders respectively, penetrate through the inside of the second slider and fix them on the second positioning hole.

[0016] Step S3, angle adjustment: rotating the mother rotating body around the positioning center axis, and adjusting the angle between the child rotating body and the mother rotating body, so that the rubber rope is tightened and passes through the two central bull's eyes;

[0017] Step S4, measuring and recording data: respectively measuring and recording the angle between the tangent planes of the interconnected mother rotating body and the child rotating body, which is the elbow angle; measuring and recording the vertical distance between the tangent planes of the two child rotating bodies, which is the length of the round tube;

[0018] Step S5, cutting and manufacturing according to the data: selecting suitable elbows and round tubes according to the data measured in step S4 and processing them; welding the processed elbows and round tubes.

[0019] Further, the fixing assembly includes a first mounting hole, a fixing plate and an annular clamp, and the connecting assembly includes a positioning shallow groove, a hollow guide column and a linear optical axis that are adapted to each other;

[0020] The first mounting hole is arranged at an end of the mother rotating body away from the pin shaft, the annular clamp is installed on the side of the mother rotating body close to the round tube, and the round tube is inserted in the first mounting hole through a fixing plate; the positioning shallow groove is arranged at an end of the tangent surface of the sub-rotating body away from the pin shaft, and the tangent surface of the sub-rotating body is symmetrically provided with two marking lines around the edge of the positioning shallow groove; the inner diameters of the first mounting hole, the positioning shallow groove and the annular clamp are all equal to the outer diameter of the round tube; the hollow guide column is arranged in the center of the positioning shallow groove and a second mounting hole adapted to the linear optical axis is arranged in the center of the hollow guide column, and the distances from the center of the first mounting hole and the second mounting hole to the pin shaft are equal; the linear optical axis is a hard columnar shape, and the linear optical axis passes through two hollow guide columns through two second mounting holes to enable the two sub-rotating bodies to be rotatably connected.

[0021] Furthermore, the fixed plate includes a square first plate and a circular second plate, a through hole is provided in the middle of the first plate, a second plate is provided on one side of the first plate at a position corresponding to the through hole, and two marking lines are symmetrically provided around the edge of the through hole on the other side, and the diameters of the second plate and the through hole are equal to the outer diameter of the circular tube.

[0022] Furthermore, the first plate and the second plate are designed as an integrated whole, and the fixed plate is inserted into the first mounting hole through the second plate.

[0023] The pipe orifice docking method is implemented based on the above-mentioned device for docking a round pipe with an elbow, and comprises the following steps:

[0024] Step S1, installing the elbow simulator: inserting the end of a round tube into the tangent plane of the female rotating body of the elbow simulator through a fixing plate; fixing the annular clamp to the outer side wall of the round tube;

[0025] Step S2, Device Connection: Take out another elbow simulator, adjust the positions of the sub-rotating bodies of the two elbow simulators so that the centers of the second mounting holes on the two sub-rotating bodies are on the same straight line, and pass a linear optical axis through the two second mounting holes to rotatably connect the two sub-rotating bodies;

[0026] Step S3, Angle Adjustment: Rotate the mother rotating body around the circular tube, rotate the sub-rotating body around the pin shaft to adjust the angle between the sub-rotating body and the mother rotating body, rotate another elbow simulator around the linear optical axis so that the fixed sticker of the other elbow simulator can be sleeved on the end of the circular tube, and fix the annular clamp on the outer wall of the circular tube;

[0027] Step S4, Measure and Record Data: Measure the angle between the tangent planes of the final mother rotating body and the sub-rotating body in Step S3, and this angle is the elbow angle; measure and record the vertical distance between the tangent planes of the two sub-rotating bodies, and this vertical distance is the length of the circular tube;

[0028] Step S5, Marking: Keep the overall shape of the elbow simulator unchanged, on the outer wall of the circular tube, at the position of the marking line corresponding to the tangent plane of the mother rotating body, make a tangent circle and mark points A and C; disassemble the fixed sticker and the circular tube to expose the first mounting hole, take an elbow and insert one end of it into the first mounting hole and plug it into the positioning shallow groove of the sub-rotating body so that the end face of the elbow and the positioning shallow groove are completely fitted; use a dye pen to draw a tangent circle on the outer wall of the exposed part of the elbow, corresponding to the marking line positions of the tangent planes of the mother rotating body and the sub-rotating body, and at the same time mark points A and C on the two tangent circles;

[0029] Step S6, Cutting and Welding: Remove the elbow, and further cut and take materials from the circular tube and the elbow along the tangent circle; align the marked points on the outer walls of the elbow and the circular tube and align the cut end faces to perform welding.

[0030] The beneficial effects of the present invention are as follows:

[0031] The present invention can simulate the docking process of the elbow and the circular tube, visually display the docking situation, and can quickly determine the elbow processing plan based on the simulation results, shortening the cycle from design to processing; without complex calculations, reducing calculation errors and dependence on highly skilled calculation personnel, and improving the docking accuracy. Brief Description of the Drawings

[0032] Figure 1 It is a schematic diagram of elbow parameters;

[0033] Figure 2 It is a schematic diagram of Embodiment 1 of the present invention;

[0034] Figure 3 It is a schematic diagram of Embodiment 2 of the present invention;

[0035] Figure 4 is Figure 3 an enlarged view of part B in;

[0036] Figure 5 a schematic structural view of the second slider in Embodiment 1;

[0037] Figure 6 a schematic structural view of the fixed mounting plate in Embodiment 2.

[0038] Reference numerals:

[0039] 1. Elbow simulator; 101. Female rotator; 102. Male rotator; 103. Circular tube central axis locator; 104. First slider; 105. Second slider; 106. Pin shaft; 107. First slide rail; 108. Second slide rail; 109. First positioning hole; 110. Rubber cord; 111. Positioning central axis; 112. Positioning angle; 113. Second positioning hole; 114. Central bull's-eye;

[0040] 2. Circular tube; 201. First mounting hole; 202. Second mounting hole; 203. Fixed mounting plate; 204. Annular clamp; 205. Linear optical axis; 206. First mounting plate; 207. Second mounting plate; 208. Hollow guide post; 209. Positioning shallow groove; 210. Marking line. Specific embodiments

[0041] In the description of this embodiment, it should be noted that the orientation or positional relationship indicated by the terms "upper / lower", "front / rear", "inner / outer", "top / bottom end", "middle", "beginning / end", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only for more clearly corresponding to different connection positions during expression, and cannot be construed as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, terms such as "installation", "provided with", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside a component of an adapted model. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, unless otherwise specified, the components used in this application are all commercially available components, and the connection between different components can be achieved by conventional technical means.

[0043] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] In actual design and production, the butt joint of the pipe orifice of the elbow and the round pipe, that is, the butt joint of the normal section of the round pipe and the normal section of the elbow, should satisfy that the central axis of the round pipe is perpendicular to the curvature center axis of the elbow and perpendicular to the radius of the elbow. As Figure 1 shown in the figure, the ellipse in the figure is the normal section of the round pipe 2 and the elbow. The curvature center axis of the elbow is perpendicular to the bisecting plane AOA' of the elbow and passes through point O; therefore, taking the curvature center axis as the rotation axis and using the radius OC of the elbow plus the radius CO of the pipe orifice, that is, the bending radius OP of the elbow as the baseline, a vertical axis PN of the baseline is made on the bisecting plane AOA' of the elbow. The direction of the vertical axis PN is the direction of the round pipe. Rotate OP so that the direction of PN changes continuously until it coincides with P'N'; similarly, the butt joint of another pipe and the elbow still follows the above operation. Finally, the vertical distance between the two normal sections, that is, the length of P'D, is made, which corresponds to the length of the round pipe in actual operation.

[0045] Embodiment 1

[0046] This embodiment is directed to the situation where the radius of the elbow and the radius of the round pipe are relatively large in actual production (such as natural gas pipelines, etc.) or the working conditions are complex and involve multiple elbow radii and round pipe radii. In this case, the butt joint of the elbow and the round pipe 2 requires multiple measurements and adjustments of the elbow radius or the round pipe radius.

[0047] On the one hand, this embodiment provides a device for butt-jointing a round pipe and an elbow suitable for the above application scenarios. As Figure 2As shown in the figure, it includes two round tubes 2 and two elbow simulators 1. The elbow simulator 1 includes a female rotating body 101 and a male rotating body 102. The female rotating body 101 and the male rotating body 102 are rectangular flat plates with the same size. One end of the female rotating body 101 and the male rotating body 102 is rotatably connected by a pin shaft 106, and the sides of the female rotating body 101 and the male rotating body 102 close to the round tube 2 are the normal sections of the two. The planes where the normal sections are located all pass through the center of the pin shaft 106; the other end of the female rotating body 101 is connected to the round tube 2 through a fixing component, and a scale is provided on the side wall of the female rotating body 101. The reading of the scale corresponds to the bending radius of the elbow; the two male rotating bodies 102 are connected through a connecting component.

[0048] In this embodiment, the implementation form of the elbow simulator 1 is: the fixing component includes a round tube central axis locator 103 and a first slider 104, and the connecting component includes a second slider 105 and a rubber cord 110;

[0049] Specifically, the round tube central axis locator 103 is a prior art. It is mainly used to accurately determine the position of the central axis of the round tube 2 to be docked, ensuring that when the elbow and the round tube 2 are docked, the central axes of the two can coincide as much as possible. Therefore, the specific structure of the round tube central axis locator 103 will not be elaborated, but it should be noted that the round tube central axis locator 103 selected in this embodiment is installed inside the round tube, and its positioning central axis 111 coincides with the central axis of the round tube 2, and the end of the positioning central axis 111 can extend out of the end of the round tube 2.

[0050] Specifically, the first slider 104 is slidably installed inside the female rotating body 101 through a first slide rail 107. The thickness of the first slider 104 is less than or equal to the thickness of the female rotating body 101. The first slide rail 107 is arranged on both sides of the female rotating body 101, and a locking device is provided on the first slide rail 107. The locking device is used to fix the position of the first slider 104. This design enables the first slider 104 to slide up and down on the female rotating body 101 through the first slide rail 107, thereby facilitating the adjustment of the distance between the first slider 104 and the pin shaft 106 and fixing it.

[0051] A first positioning hole 109 adapted to the positioning central axis 111 is provided in the center of the first slider 104. The positioning central axis 111 is connected to the first slider 104 through the first positioning hole 109. The round tube 2 and the female rotating body 101 can be connected together through the positioning central axis 111 and the first slider 104.

[0052] One end of the second slider 105 is vertically installed inside the male rotating body 102 through a second slide rail 108, and the other end protrudes from the surface of the male rotating body 102. The second slider 105 simulates Figure 1 the vertical axis PN in

[0053] AsFigure 5 As shown in Figure 5 , the interior of the second slider 105 is hollow, and a second positioning hole 113 is provided at one end of the second slider 105 close to the sub-rotating body 102, and four positioning angles 112 pointing to the central bull's-eye 114 are provided on the inner side wall at the other end. It should be noted that the central bull's-eye 114 is only for describing the central position pointed to by the four positioning angles 112, which is convenient for subsequent description of the operation method and is not an actual structural component.

[0054] It can be understood that the mother rotating body 101 and the sub-rotating body 102 have the same size, and the angle between their front sections represents the elbow angle in actual operation, corresponding to Figure 1 angle AOA' in Figure 1 ; the distance between the center of the first positioning hole 109 and the pin shaft 106 is the corresponding scale reading on the mother rotating body 101, which represents the sum of the elbow radius and the pipe radius in actual calculation, corresponding to Figure 1 the sum of OC and CP in Figure 1 , that is, the bending radius of the elbow; the pin shaft 106 is the curvature center axis of the elbow; the second slider 105 is perpendicular to the sub-rotating body 102 as a whole, and its pointing direction is the direction of the pipe 2, corresponding to Figure 1 rays PN and P'N' in Figure 1 .

[0055] On the other hand, based on the above device and application scenario for the docking of the pipe and the elbow, this embodiment provides a method for the docking of the pipe and the elbow. As Figure 2 shown, it includes the following steps:

[0056] Step S1, install two elbow simulators 1: Install the pipe central axis positioners 103 in two pipes 2 respectively, so that the positioning central axis 111 of the pipe central axis positioner 103 coincides with the central axis of the pipe 2, thereby determining the center position of the front section of the elbow and the pipe 2; pass the positioning central axis 111 of the pipe central axis positioner 103 through the first positioning hole 109 of the elbow simulator 1, and make the end face of the pipe 2 fit the front section of the mother rotating body 101, thereby fixing the two elbow simulators 1 and the two pipes 2 together; adjust the positions of the first slider 104 and the second slider 105 so that the distances between the centers of the first positioning hole 109 and the second positioning hole 113 and the pin shaft 106 are both equal to the bending radius of the elbow;

[0057] It should be noted that the side walls of the mother rotating body 101 and the sub-rotating body 102 close to the pipe 2 are their front sections; specifically, in Figure 2 Figure 2 , the front section of the mother rotating body 101 contacts the pipe 2, and the front section of the sub-rotating body 102 is the side wall close to the mother rotating body 101. The front section is only for simplifying the description of the operation method;

[0058] Step S2, device connection: Take a rubber cord 110 and connect thin ropes to both ends thereof; respectively pass the ends of the two thin ropes through between the positioning angles 112 of the two second sliders 105, penetrate through the interiors of the two second sliders 105 and fix them on the two second positioning holes 113; thus connect the two elbow simulators 1 together, at this time the rubber cord 110 does not pass through the two central bull's-eyes 114;

[0059] Step S3, angle adjustment: Rotate the female rotating body 101 around the positioning central axis 111 of the circular tube central axis positioner 103, this operation is mainly to cope with the butt joint of the elbow with a special-shaped surface and the circular tube 2; adjust the angle between the sub-rotating body 102 and the female rotating body 101 so that the rubber cord 110 is tightened and passes through the two central bull's-eyes 114. When the rubber cord 110 is tightened and passes through the two central bull's-eyes 114, the rubber cord 110 always passes through the center of the circular tube 2, that is, the rubber cord 110 coincides with the central axis of the circular tube 2, and the angle between the positive tangent planes of the female rotating body 101 and the sub-rotating body 102 is exactly the elbow angle;

[0060] Step S4, measure and record data: respectively measure and record the included angle between the positive tangent planes of the mutually connected female rotating body 101 and the sub-rotating body 102, and this included angle is the elbow angle; measure and record the vertical distance between the positive tangent planes of the two sub-rotating bodies 102, and this vertical distance is the length of the circular tube 2;

[0061] Step S5, material cutting and manufacturing according to the data: Select suitable elbows and circular tubes 2 according to the data measured in Step S4 and carry out processing; weld the processed elbows and circular tubes 2.

[0062] Embodiment 2

[0063] This embodiment is directed to the situation where the elbow radius and the circular tube radius are small in actual production and the working conditions are simple and only involve one elbow radius and one circular tube radius (for example, stainless steel staircase handrails, generally made of circular tubes with a diameter of 63). In this case, it is not necessary to adjust the two radii.

[0064] In view of the above application background, this embodiment is modified and adapted on the basis of Embodiment 1, and a device for docking a circular pipe and an elbow is provided. This device is the same as that in Embodiment 1 and also includes two circular pipes 2 and two elbow simulators 1. The elbow simulator 1 includes a female rotating body 101 and a male rotating body 102. The female rotating body 101 and the male rotating body 102 are rectangular flat plates with the same size. One end of the female rotating body 101 and the male rotating body 102 is rotatably connected by a pin shaft 106, and the sides of the female rotating body 101 and the male rotating body 102 close to the circular pipe 2 are the normal sections of the two. The planes where the normal sections are located all pass through the center of the pin shaft 106; the other end of the female rotating body 101 is connected to the circular pipe 2 through a fixing component, and a scale is provided on the side wall of the female rotating body 101. The two male rotating bodies 102 are connected through a connecting component.

[0065] The difference is that there are differences in the fixing component and the connecting component involved in the elbow simulator 1. For example, Figure 3 As shown, the implementation form of the elbow simulator 1 is: the fixing component includes a first mounting hole 201, a fixing patch plate 203 and an annular clamp 204, and the connecting component includes a positioning shallow groove 209, a hollow guide post 208 and a linear optical axis 205 that are mutually adapted;

[0066] The depth of the positioning shallow groove 209 is relatively shallow. Its design purpose is to finally position the contour of the inserted end of the elbow, which is convenient for marking on the elbow;

[0067] The first mounting hole 201 is provided at the end of the female rotating body 101 away from the pin shaft 106. The annular clamp 204 is installed on the side of the female rotating body 101 close to the circular pipe 2. The circular pipe 2 is inserted into the first mounting hole 201 through the fixing patch plate 203 and is installed on the female rotating body 101 in cooperation with the annular clamp 204; as Figure 3 shown, the positioning shallow groove 209 is provided at the end of the normal section of the male rotating body 102 away from the pin shaft 106. Two marking lines 210 are symmetrically provided on the normal section of the male rotating body 102 around the edge of the positioning shallow groove 209, corresponding to Figure 1 points A' and C'; the inner diameters of the first mounting hole 201, the positioning shallow groove 209 and the annular clamp 204 are all equal to the outer diameter of the circular pipe 2; the hollow guide post 208 is provided in the center of the positioning shallow groove 209, and a second mounting hole 202 adapted to the linear optical axis 205 is provided in the center of the hollow guide post 208. The distances from the centers of the second mounting hole 202 and the first mounting hole 201 to the pin shaft 106 are equal; the linear optical axis 205 is a rigid column. The linear optical axis 205 passes through the two hollow guide posts 208 through the two second mounting holes 202 so that the two male rotating bodies 102 are rotatably connected.

[0068] It should be noted that the side walls of the female rotating body 101 and the male rotating body 102 close to the circular pipe 2 are the normal sections of the two; specifically, in Figure 3In it, the circular tube 2 is inserted into the front section of the female rotating body 101. The front section of the male rotating body 102 is the side wall close to the female rotating body 101. The front section is only for simplifying the description of the operation method. At the same time, in actual operation, multiple linear optical axes 205 with different lengths will be prepared, and finally the linear optical axis 205 that fits the actual requirements will be selected for installation.

[0069] As Figure 6 shown, the fixed mounting plate 203 includes a square first mounting plate 206 and a circular second mounting plate 207. A through hole is provided in the middle of the first mounting plate 206. A second mounting plate 207 is provided at a position corresponding to the through hole on one side of the first mounting plate 206, and two marking lines 210 are symmetrically arranged around the edge of the through hole on the other side, corresponding to Figure 1 points A and C of

[0070] Based on the above device for docking a circular tube and an elbow and the application scenario, this embodiment provides a method for docking a circular tube and an elbow, including the following steps:

[0071] Step S1, install the elbow simulator 1: Insert the end of a circular tube 2 into the front section of the female rotating body 101 of the elbow simulator 1 through the fixed mounting plate 203; fix the annular clamp 204 on the outer wall of the circular tube 2. The annular clamp 204 should not be fixed too tightly or too loosely, so that relative rotation can occur between the female rotating body 101 and the circular tube 2;

[0072] Step S2, device connection: Take out another elbow simulator 1, adjust the positions of the male rotating bodies 102 of the two elbow simulators 1 so that the centers of the second mounting holes 202 on the two male rotating bodies 102 are on the same straight line, and pass the linear optical axis 205 through the two second mounting holes 202 to rotatably connect the two male rotating bodies 102, thereby connecting the two elbow simulators 1 together;

[0073] Step S3, angle adjustment: Rotate the female rotating body 101 around the circular tube 2, rotate the male rotating body 102 around the pin shaft 106 to adjust the angle between the male rotating body 102 and the female rotating body 101, and rotate another elbow simulator 1 (at this time, this elbow simulator 1 is not temporarily installed with a circular tube 2) around the linear optical axis 205 so that the fixed mounting plate 203 on the female rotating body 101 of another elbow simulator 1 can be sleeved on the end of the circular tube 2, and then fix the annular clamp 204 on the outer wall of the circular tube 2 to fix another elbow simulator 1 and the circular tube 2 together;

[0074] Step S4, measure and record data: Measure and record the angle between the normal sections of the final female rotator 101 and the male rotator 102 in Step S3. This angle is the elbow angle. Measure and record the vertical distance between the normal sections of the two male rotators 102. This vertical distance is the length of the circular tube;

[0075] Step S5, mark: Keep the overall shape of the elbow simulator 1 unchanged. On the outer wall of the circular tube 2, at the position of the marking line 210 corresponding to the normal section of the female rotator 101, make a tangent circle and mark points A and C; Remove the fixed platen 203 and the circular tube 2 to expose the first mounting hole 201. Take an elbow and insert one end thereof into the first mounting hole 201 and plug it into the positioning shallow groove 209 of the male rotator 102 so that the end face of the elbow and the positioning shallow groove 209 are completely fitted; Use a dye pen to draw a tangent circle on the outer wall of the exposed part of the elbow, at the position of the marking line 210 corresponding to the normal sections of the female rotator 101 and the male rotator 102, and at the same time mark points A and C on the two tangent circles;

[0076] Step S6, cut and weld: Remove the elbow, and further cut and take materials from the circular tube 2 and the elbow along the tangent circle; Align the marked points on the outer walls of the elbow and the circular tube 2 and align the cut end faces to perform welding.

[0077] It can be understood that, as Figures 1 to 3 shown, in the above Embodiment 1 and Embodiment 2, the planes where the normal sections of the female rotator 101 and the male rotator 102 are located both pass through the center of the pin shaft 106; Corresponding Figure 1 to the elliptical normal section, both OP and OP' pass through point O, that is, pass through the straight line where the curvature center axis of the elbow is located.

[0078] Although the embodiments of the present invention are described in the specification, these embodiments are only for reference and should not limit the protection scope of the present invention. All omissions, substitutions and changes made within the scope not departing from the gist of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for butting a round tube with an elbow, characterized in that: It includes two circular tubes and two elbow simulators, wherein the elbow simulator includes a mother rotating body and a sub-rotating body, wherein the mother rotating body and the sub-rotating body are rectangular flat plates of the same size, one end of the mother rotating body and the sub-rotating body are rotatably connected by a pin shaft, and the side of the mother rotating body and the sub-rotating body close to the circular tube is the tangent plane of the two, and the plane where the tangent plane is located passes through the center of the pin shaft, the other end of the mother rotating body is connected to the circular tube through a fixing component, and the side wall of the mother rotating body is provided with a scale, and the two sub-rotating bodies are connected by a connecting component.

2. The device for butting a round tube with an elbow as claimed in claim 1, characterized in that: The fixing assembly includes a circular tube central axis positioner and a first slider, and the connecting assembly includes a second slider and a rubber rope; The circular tube center axis locator is fixed inside the circular tube and the end of the positioning center axis is connected to the first slider, and the first slider is slidably installed inside the mother rotating body through the first slide rail; one end of the second slider is vertically installed at the other end of the sub-rotating body through the second slide rail and the other end of the second slider protrudes from the surface of the sub-rotating body.

3. The device for butting a round tube with an elbow as claimed in claim 2, characterized in that: A first positioning hole adapted to the positioning center axis is arranged at the center of the first sliding block, and the positioning center axis is connected to the first sliding block via the first positioning hole.

4. The device for butting a round tube with an elbow as claimed in claim 3, characterized in that: The first slide rails are arranged on both sides of the mother rotating body and a locking device is arranged on the first slide rails.

5. The device for butting a round tube with an elbow as claimed in claim 4, characterized in that: The second sliding block is hollow inside, and a second positioning hole is arranged at one end of the second sliding block close to the sub-rotating body, and four positioning angles pointing to the central bull's eye are arranged on the inner side wall of the other end.

6. A method for butting a round tube with an elbow, characterized in that: The device for butting a round tube with an elbow according to claim 5 is implemented, comprising the following steps: Step S1, installing a bilateral elbow simulator: installing the circular tube center axis positioner in two circular tubes respectively so that the positioning center axis coincides with the center axis of the circular tube; passing the positioning center axis of the circular tube center axis positioner through the first positioning hole so that the end surface of the circular tube fits the tangent surface of the mother rotating body; adjusting the positions of the first slider and the second slider so that the distances between the center of the first positioning hole and the second positioning hole and the pin are equal to the bending radius of the elbow; Step S2, device connection: take a rubber rope, connect thin ropes at both ends of the rubber rope respectively; insert the ends of the two thin ropes between the positioning angles of the two second sliders respectively, pass through the interior of the second sliders and fix them on the second positioning holes; Step S3, angle adjustment: rotating the mother rotating body around the positioning center axis, and adjusting the angle between the child rotating body and the mother rotating body, so that the rubber rope is tightened and passes through the two central bull's eyes; Step S4, measuring and recording data: respectively measuring and recording the angle between the tangent planes of the interconnected mother rotating body and the child rotating body, which is the elbow angle; measuring and recording the vertical distance between the tangent planes of the two child rotating bodies, which is the length of the round tube; Step S5, cutting and manufacturing according to the data: selecting suitable elbows and round tubes according to the data measured in step S4 and processing them; welding the processed elbows and round tubes.

7. The device for butting a round tube with an elbow as claimed in claim 1, characterized in that: The fixing assembly includes a first mounting hole, a fixing plate and an annular clamp, and the connecting assembly includes a positioning shallow groove, a hollow guide column and a linear optical axis that are adapted to each other; The first mounting hole is arranged at an end of the mother rotating body away from the pin shaft, the annular clamp is installed on the side of the mother rotating body close to the round tube, and the round tube is inserted in the first mounting hole through a fixing plate; the positioning shallow groove is arranged at an end of the tangent surface of the sub-rotating body away from the pin shaft, and the tangent surface of the sub-rotating body is symmetrically provided with two marking lines around the edge of the positioning shallow groove; the inner diameters of the first mounting hole, the positioning shallow groove and the annular clamp are all equal to the outer diameter of the round tube; the hollow guide column is arranged in the center of the positioning shallow groove and a second mounting hole adapted to the linear optical axis is arranged in the center of the hollow guide column, and the distances from the center of the first mounting hole and the second mounting hole to the pin shaft are equal; the linear optical axis is a hard columnar shape, and the linear optical axis passes through two hollow guide columns through two second mounting holes to enable the two sub-rotating bodies to be rotatably connected.

8. The device for butting a round tube with an elbow as claimed in claim 7, characterized in that: The fixed plate includes a square first plate and a circular second plate, a through hole is arranged in the middle of the first plate, a second plate is arranged at a position corresponding to the through hole on one side of the first plate, and two marking lines are symmetrically arranged around the edge of the through hole on the other side, and the diameters of the second plate and the through hole are equal to the outer diameter of the circular tube.

9. The device for butting a round tube with an elbow as claimed in claim 8, characterized in that: The first plate and the second plate are designed as an integrated whole, and the fixed plate is inserted into the first mounting hole through the second plate.

10. A method for butt-jointing a round tube and an elbow, characterized in that: The device for butting a round tube with an elbow according to claim 9 is implemented, comprising the following steps: Step S1, installing the elbow simulator: inserting the end of a round tube into the tangent plane of the female rotating body of the elbow simulator through a fixing plate; fixing the annular clamp to the outer side wall of the round tube; Step S2, device connection: take out another elbow simulator, adjust the positions of the sub-rotating bodies of the two elbow simulators so that the centers of the second mounting holes on the two sub-rotating bodies are located on the same straight line, and pass the linear optical axis through the two second mounting holes to enable the two sub-rotating bodies to be rotationally connected; Step S3, angle adjustment: rotate the parent rotating body around the round tube, rotate the sub-rotating body around the pin shaft to adjust the angle between the sub-rotating body and the parent rotating body, and rotate another elbow simulator around the linear optical axis so that the fixing plate of the other elbow simulator can be sleeved on the end of the round tube, and the annular clamp is fixed to the outer wall of the round tube; Step S4, measuring and recording data: measuring the angle between the tangent planes of the final mother rotating body and the child rotating body in step S3, which is the elbow angle; measuring and recording the vertical distance between the tangent planes of the two child rotating bodies, which is the length of the round tube; Step S5, marking: keep the overall shape of the elbow simulator unchanged, make a tangent circle and mark point A and point C on the outer wall of the circular tube corresponding to the marking position of the tangent plane of the mother rotating body; remove the fixing plate and the circular tube to expose the first mounting hole, take an elbow and insert one end of it through the first mounting hole and plug it into the positioning shallow groove of the sub-rotating body, so that the end face of the elbow and the positioning shallow groove are completely fitted; use a dye pen to draw a tangent circle on the outer wall of the exposed part of the elbow corresponding to the marking position of the tangent plane of the mother rotating body and the sub-rotating body, and mark point A and point C on the two tangent circles; Step S6, cutting and welding: remove the elbow, and further cut the round tube and the elbow along the tangent circle to obtain the material; Align the marking points on the outer wall of the elbow and the round tube and align the cut end faces before welding.

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