Bending device for small diameter thin wall pipes used for spraying and atomizing in deodorizing equipment

Abstract

The present invention discloses a pipe bending processing device for a small diameter thin wall pipe used for spraying and atomizing in a deodorizing device, comprising a positioning bracket, a fastening assembly, a first positioning shaft, a fixed and movable wheel fixed rotating arm, a fixed pulley and a movable pulley, the outer peripheries of the fixed pulley and the movable pulley are provided with arc-shaped grooves adapted to the outer wall of the pipe to be bent, one end of the pipe to be bent passes through a pipe folding hole and is fastened to the fastening assembly, the part to be bent of the pipe to be bent is located at the pipe folding hole, and the support ball at the front end of the movable screw is adjusted by adjusting the tightening nut so that it is always located at the stress-bearing part of the pipe folding hole. The pipe bending processing device for a small diameter thin wall pipe used for spraying and atomizing in a deodorizing device of the present invention can ensure that the bent pipe part is not flat, wrinkled or cracked, and has a smooth appearance, which is very suitable for product trial production and small batch production, and is easy to operate manually, requires little investment, and has quick results.

Description

Technical Field

[0001] The invention relates to deodorizing equipment, in particular to a bending pipe processing device for a small-diameter thin-wall pipe used for spraying and atomizing in the deodorizing equipment. Background Art

[0002] In deodorization equipment, a large number of small-diameter thin-walled tubes are needed for spraying and atomization. These small-diameter thin-walled tubes are laid in the deodorization equipment according to the requirements of the internal structure. Sometimes they even need to pass through the cavity, which requires the small-diameter thin-walled tubes to be bent to adapt to the internal structure of the deodorization equipment.

[0003] There is an insurmountable technical problem in the bending of small-diameter thin-walled tubes: either the tube wall at the bend will wrinkle due to extrusion during bending, or the circular inner hole at the bend will be flattened due to extrusion during bending, which greatly increases the fluid resistance in the tube. The smaller the bending angle, the more serious the problem.

[0004] In order to reduce these defects of small-diameter thin-walled pipes at the bends, the commonly used method is: first fill the pipe to be bent with fine sand, then seal the two ends of the pipe to be bent, seal the fine sand in the pipe to be bent, then bend the pipe to be bent, and finally remove the seals at both ends of the pipe to be bent and pour out the fine sand. Since the pipe to be bent is filled with fine sand, the wrinkles and flattening of the pipe wall at the bend will be much better, but there will still be flattening and wrinkles at the bend, and even rupture will occur, making it difficult to control the quality. Summary of the invention

[0005] The purpose of the present invention is to provide a bending processing device for small-diameter thin-walled tubes used for spray atomization in deodorizing equipment, which can ensure that the bent tube part is not flat, wrinkled or cracked, and has a smooth appearance. It is very suitable for product trial production and small batch production, and is easy to operate manually, requires little investment, and has quick results.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A pipe bending processing device for a small-diameter thin-walled pipe used for spraying and atomizing in a deodorizing device, comprising a positioning bracket fixed on a bench vise, the positioning bracket comprising at least one flat plate, the front part of the flat plate being provided with a fastening assembly for fixing a pipe to be bent, a first positioning shaft being passed through a first curved arc center positioning hole at the rear part of the flat plate, a fixed and movable wheel fixed rotating arm for bending the pipe to be bent being installed on the first positioning shaft, a fixed pulley and a movable pulley being arranged side by side on the fixed and movable wheel fixed rotating arm, the fixed pulley being installed on the first positioning shaft, the movable pulley being installed on a second positioning shaft provided on the fixed and movable wheel fixed rotating arm, the outer peripheries of the fixed pulley and the movable pulley being provided with a fixing member that is aligned with the pipe to be bent The pipe to be bent is located at the pipe folding hole, and a movable pulley is used to tighten the tightening nut.

[0008] The fastening assembly includes: a base fixed on a flat plate, a movable pressure cover hinged on the base, and the base and the movable pressure cover are both provided with arc-shaped grooves matching the outer wall of the pipe to be bent at corresponding positions in the middle. The base and the movable pressure cover are fastened by a tightening bolt assembly.

[0009] The fastening assembly comprises: a pipe joint fixedly connected to the front end of the pipe to be bent, a front positioning pin arranged on the front positioning pin hole of the plate, and the through hole of the pipe joint is positioned on the front positioning pin.

[0010] A vertical plate extending downward is provided on the inner side of the front end of the flat plate, and a vertical plate fastening assembly for positioning the pipe to be bent is provided on the vertical plate. A flat plate extension portion extending inward is provided on the inner side of the rear end of the flat plate, and a second curved arc center positioning hole of the same size as the first curved arc center positioning hole is provided on the flat plate extension portion.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: due to the adoption of the above technical scheme, the fixed pulley and the movable pulley utilize the arc-shaped grooves on their outer circumferences that are compatible with the outer walls of the pipes to be bent to roll and bend the pipes to be bent; at the bending stress point of the pipes to be bent, the outer circumference is restricted by the folding holes formed by the arc-shaped grooves and the interior is supported by support balls, which can ensure that the bent pipe part is not flat, wrinkled or cracked, and has a smooth appearance. It is very suitable for product trial production and small batch production, and is easy to operate manually, requires little investment, and has quick results.

[0012] A further beneficial effect is that: a vertical plate extending downward is provided on the inner side of the front end of the flat plate, a vertical plate fastening assembly for positioning the pipe to be bent is provided on the vertical plate, a flat plate extension portion extending inward is provided on the inner side of the rear end of the flat plate, and a second curved arc center positioning hole of the same size as the first curved arc center positioning hole is provided on the flat plate extension portion. This structure can bend the bent pipe again by fixing the front end of the bent pipe to the vertical plate fastening assembly and installing the first positioning shaft in the second curved arc center positioning hole, so that the pipe to be bent is bent into a three-dimensional curved pipe (see attached drawing). Figure 5 and 6 ). BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the present invention;

[0014] Figure 2 yes Figure 1 Top view;

[0015] Figure 3 yes Figure 1 The middle is a schematic diagram of the structure when the pipe to be bent is bent 90 degrees;

[0016] Figure 4 yes Figure 3 Top view;

[0017] Figure 5 It is a structural schematic diagram of re-bending a bent pipe;

[0018] Figure 6 yes Figure 5 A top view of

[0019] Figure 7 yes Figure 2 An enlarged view of the assembly structure of the fixed pulley and the movable pulley;

[0020] Figure 8 It is a schematic diagram of another structure of a fastening assembly fixing a pipe to be bent;

[0021] Fig. 9 yes Figure 8 AA view;

[0022] Fig.10 It is a schematic diagram of the structure of the pipe to be bent;

[0023] Fig.11 yes Figure 1 A schematic diagram of the structure of the positioning bracket;

[0024] Fig.12 yes Fig.11 A top view of

[0025] Fig.13yes Figure 1 Schematic diagram of the structure of the supporting ball and the moving screw.

[0026] The names of the parts represented by the serial numbers in the figure are as follows:

[0027] 1. Positioning bracket, 1-1. Flat plate, 1-2. Center positioning hole of the first curved arc, 1-3. Front positioning pin hole, 1-4. Vertical plate, 1-5. Flat plate extension, 1-6. Center positioning hole of the second curved arc, 1-7. Positioning pin hole of the vertical plate, 2. Pipe fitting to be bent, 3. First positioning axis, 4. Fixed and movable wheel fixing rotating arm, 5. Fixed pulley, 6. Second positioning axis, 7. Movable pulley, 8. Arc-shaped groove, 8-1 folding pipe hole, 9. Base, 10. Movable gland, 11. Clamping bolt assembly, 12. Pipe joint, 13. Front positioning pin, 14. Through hole, 15. Moving screw, 16. Support ball, 17. Tightening nut, 18. Force rod. DETAILED DESCRIPTION

[0028] In order to make the technical solution of the present invention clearer, the following Figures 1 to 13 It should be understood that the specific implementation methods described in this specification are only for explaining the present invention, and are not intended to limit the protection scope of the present invention.

[0029] The present invention is a pipe bending processing device for a small-diameter thin-walled pipe used for spraying and atomizing in a deodorizing device, comprising a positioning bracket 1 fixed on a bench vise, the positioning bracket 1 comprising at least a flat plate 1-1, a fastening assembly for fixing a pipe fitting 2 to be bent is provided at the front of the flat plate 1-1, a first positioning shaft 3 is passed through a first curved arc center positioning hole 1-2 at the rear of the flat plate 1-1, a fixed wheel fixed rotating arm 4 for bending the pipe fitting 2 to be bent is installed on the first positioning shaft 3, a fixed pulley 5 and a movable pulley 7 are arranged side by side on the fixed wheel fixed rotating arm 4, the fixed pulley 5 is installed on the first positioning shaft 3, the fixed pulley 5 does not move with the rotation of the fixed wheel fixed rotating arm 4, the movable pulley 7 is installed on a second positioning shaft 6 provided on the fixed wheel fixed rotating arm 4, the movable pulley 7 rotates around the fixed pulley center with the fixed wheel fixed rotating arm 4, and the outer peripheries of the fixed pulley 5 and the movable pulley 7 are both provided with A circular arc groove 8 is matched with the outer wall of the pipe 2 to be bent, one end of the pipe 2 to be bent passes through the pipe folding hole 8-1 formed by the circular arc groove 8 between the fixed pulley 5 and the movable pulley 7 and is fastened to the fastening assembly, the part to be bent of the pipe 2 to be bent is located at the pipe folding hole 8-1, a moving screw 15 is provided in the pipe 2 to be bent, a supporting ball 16 is provided at the front end of the moving screw 15, a gap is provided between the spherical surface of the supporting ball 16 and the inner wall of the pipe 2 to be bent, a thread is provided at the rear end of the moving screw 15, the terminal end of the thread is exposed outside the tightening nut 17 at the rear end of the pipe 2 to be bent, the length of the inner thread of the pipe is greater than the arc length of the center line of the bending part, a tightening nut 17 is provided on the thread at the terminal end, when the pipe 2 to be bent, the tightening nut 17 is adjusted to make the supporting ball 16 always located at the force-bearing part of the pipe folding hole 8-1.

[0030] Preferably, the fastening assembly includes: a base 9 fixed on the flat plate 1-1, a movable pressure cover 10 hinged on the base 9, the base 9 and the movable pressure cover 10 are provided with arc-shaped grooves matching the outer wall of the pipe 2 to be bent at corresponding positions in the middle, and the base 9 and the movable pressure cover 10 are fastened by a tightening bolt assembly 11.

[0031] The fastening assembly includes: a pipe joint 12 fixedly connected to the front end of the pipe 2 to be bent, a front positioning pin 13 arranged on the front positioning pin hole 1-3 of the flat plate 1-1, and a through hole 14 of the pipe joint 12 is positioned on the front positioning pin 13.

[0032] A vertical plate 1-4 extending downward is provided on the inner side of the front end of the flat plate 1-1, and a vertical plate fastening assembly for positioning the pipe 2 to be bent is provided on the vertical plate 1-4. A flat plate extension portion 1-5 extending inward is provided on the inner side of the rear end of the flat plate 1-1, and a second curved arc center positioning hole 1-6 having the same size as the first curved arc center positioning hole 1-2 is provided on the flat plate extension portion 1-5. This structure, by fixing the front end of the bent pipe to the vertical plate fastening assembly, for example, a vertical plate positioning pin hole 1-7 is provided on the vertical plate 1-4, and a front positioning pin 13 is installed in the vertical plate positioning pin hole 1-7 for positioning the pipe joint 12), and the first positioning shaft is installed in the second curved arc center positioning hole, so that the bent pipe can be bent again, and the pipe to be bent can be bent into a three-dimensional curved pipe (see attached Figure 5 and 6 ).

[0033] The method of using the above-mentioned pipe bending processing device is as follows:

[0034] Step 1: Fix the positioning bracket 1 on the bench vise, and rotate the force-adding rod 18 of the fixed wheel fixed rotating arm 4 around the first positioning axis 3 to the inner side;

[0035] Step 2: Take the pipe 2 to be bent, pass the front end of the pipe 2 to be bent through the pipe folding hole 8-1, and then fasten the front end of the pipe 2 to be bent to the fastening assembly so that the part to be bent of the pipe 2 to be bent is located at the pipe folding hole 8-1;

[0036] Step 3: insert the movable screw 15 into the inner hole of the pipe 2 to be bent, and adjust the tightening nut 17 so that the supporting ball 16 is located at the pipe folding hole 8-1;

[0037] Step 4: The right hand applies force through the force-adding rod 18 to make the fixed and movable wheel fixed rotating arm 4 rotate outward around the first positioning axis 3, and the movable pulley 7 rotating around the first positioning axis 3 bends the pipe 2 to be bent toward the fixed pulley 5. At the same time, the left hand rotates the tightening nut 17 to move the support ball 16 to the rear end. The distance that the support ball 16 moves to the rear end is adapted to the bending angle of the fixed and movable wheel fixed rotating arm 4, so that the support ball 16 is always located at the force-bearing part of the movable pulley 7 and the fixed pulley 5 to bend the pipe 2 to be bent;

[0038] Step 5: After the pipe 2 to be bent is bent to a desired angle, the movable screw 15 is pulled out and the fastening assembly is loosened to obtain a bent pipe.

[0039] After the pipe bending operation is completed, the size and angle of the pipe to be bent 2 (hereinafter referred to as the pipe fitting) can be checked with a ruler, a protractor or a universal protractor, and the pipe fitting can be fixed on the table of a bench drill for correction, or a casing can be inserted into the straight pipe part of the pipe fitting to manually bend it with force to correct the size or angle.

[0040] When bending pipes, both hands need to cooperate to control the bending speed and the right-hand speed of the tightening nut 17. When the left hand feels that the right-hand tightening nut 17 is heavier, the support ball 16 is in front of the stress-bending part of the pipe to be bent and the front end of the pipe to be bent is in front, and the speed of the right-hand tightening nut 17 should be increased; if the right-hand tightening nut 17 feels lighter, the right-hand tightening nut 17 speed needs to be slower, and the right-hand bending speed can be faster. You can also use a ruler to measure the distance between the rear end of the pipe to be bent 2 and the pipe folding hole 8-1, and determine the depth of the support ball 16 when it is first inserted into the inner hole of the pipe to be bent 2 based on this distance. For inexperienced operators, you can also use a ruler to measure the distance between the rear end of the pipe to be bent 2 and the pipe folding hole 8-1 during the bending process to adjust the position of the support ball 16.

[0041] According to the different sizes and angles of the pipes 2 to be bent, the sizes of the various parts of the pipe bending processing device, such as the positioning bracket 1, the fastening assembly, the movable pulley 7 and the fixed pulley 5, the moving screw 15, the supporting ball 16, etc., can be adjusted.

[0042] It is suitable for seamless steel pipes and copper pipes with a diameter of 10-15mm, a wall thickness of 0.5-1mm, a bending R of 1.2-2.0 times the pipe diameter, and a bending angle of 80-90 degrees. The internal and external matching tolerances of the pipes to be bent are determined by using the gap in the elastic range of the steel pipe. The quality of the pipe bending can ensure that the bent pipe part is not flat, wrinkled, or cracked, and the appearance is smooth. The positioning size and angle correction are easy to control. It is suitable for product trial production and small batch production, with simple manual operation, small investment, and quick results.

[0043] Specific example: a copper tube with an outer diameter of 14mm and a wall thickness of 1mm, a bend with a bending radius of 20mm and an angle of 85°, a diameter of the movable screw 15 of 10mm, a diameter of the supporting ball 16 of 11.8mm, an outer radius of the movable pulley 7 of 20mm, a radius of the arc-shaped groove of 14.1mm, and a size of the fixed pulley 5 being the same as that of the movable pulley 7. The above dimensions are allowed to have an appropriate tolerance, such as ±0.01mm.

Claims

1. A pipe bending processing device for a small-diameter thin-walled pipe used for spraying and atomizing in a deodorizing device, comprising a positioning bracket (1) fixed on a bench vise, the positioning bracket (1) comprising at least one flat plate (1-1), the front portion of the flat plate (1-1) being provided with a fastening assembly for fixing a pipe member (2) to be bent, a first positioning shaft (3) passing through a first curved arc center positioning hole (1-2) at the rear portion of the flat plate (1-1), a fixed wheel fixing rotating arm (4) for bending the pipe member (2) to be bent being mounted on the first positioning shaft (3), a fixed pulley (5) and a movable pulley (7) being arranged side by side on the fixed wheel fixing rotating arm (4), the fixed pulley (5) being mounted on the first positioning shaft (3), the movable pulley (7) being mounted on a second positioning shaft (6) arranged on the fixed wheel fixing rotating arm (4), the outer circumferences of the fixed pulley (5) and the movable pulley (7) being provided with a fixing member adapted to fit the outer wall of the pipe member (2) to be bent. The fixing assembly (5) and the movable pulley (7) are provided with an arc-shaped groove (8), one end of the pipe (2) to be bent passes through a pipe-bending hole (8-1) formed by the arc-shaped groove (8) between the fixed pulley (5) and the movable pulley (7) and is fastened to the fastening assembly, the portion of the pipe (2) to be bent being located at the pipe-bending hole (8-1), a movable screw (15) is provided in the pipe (2) to be bent, a support ball (16) is provided at the front end of the movable screw (15), and the support ball (16) is provided at the front end of the movable screw (15). There is a gap between the spherical surface of the support ball (16) and the inner wall of the pipe (2) to be bent, the rear end of the movable screw (15) is provided with a thread, the end of the thread is exposed outside the rear end of the pipe (2) to be bent, and a tightening nut (17) is provided on the thread of the end. When the pipe (2) to be bent is bent, the tightening nut (17) is adjusted so that the support ball (16) is always located at the force-bearing position of the pipe folding hole (8-1), and the fastening assembly comprises: A base (9) fixed on the plate (1-1), a movable gland (10) hinged on the base (9), the base (9) and the movable gland (10) are provided with arc-shaped grooves matching the outer wall of the pipe (2) to be bent at corresponding positions in the middle, the base (9) and the movable gland (10) are fastened by a clamping bolt assembly (11), and the fastening assembly comprises: a pipe joint (12) fixedly connected to the front end of the pipe (2) to be bent, a front positioning pin (13) arranged on the front positioning pin hole (1-3) of the plate (1-1), and the The through hole (14) of the pipe joint (12) is positioned on the front positioning pin (13), and is characterized in that: a vertical plate (1-4) extending downward is provided on the inner side of the front end of the flat plate (1-1), a vertical plate fastening assembly for positioning the pipe (2) to be bent is provided on the vertical plate (1-4), a flat plate extension portion (1-5) extending inward is provided on the inner side of the rear end of the flat plate (1-1), and a second curved arc center positioning hole (1-6) having the same size as the first curved arc center positioning hole (1-2) is provided on the flat plate extension portion (1-5).

Images