A small-bore copper and stainless steel tube hand bending device and method of use

Abstract

The application discloses a small-bore copper pipe and stainless steel pipe manual pipe bending device and a use method thereof, and the device comprises a body which is marked with an angle scale, an operating assembly which can apply force to the pipe along an arc-shaped pipe bending rotation groove on the body, and a caliber adjusting mechanism which is suitable for pipes with different outer diameters. The device is designed to optimize the production and installation of small-bore pipelines of systems such as valve remote control pipes, liquid level remote measurement pipes and remote control hydraulic pipes on ships, and to improve the efficiency and quality of manual pipe bending and straightening. Compared with the traditional manual method, the device is easy to operate, and one person can perform the construction, thereby significantly reducing the production cost and labor cost. Through the device, the labor and the need for softening the pipe by heating are avoided, the construction risk is reduced, the time and cost are saved, the pipe damage caused by heating is avoided, the standardization and the aesthetics of the pipeline are ensured, and the device is easy to operate.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of pipe processing, and particularly relates to a small-bore red copper pipe and stainless steel pipe manual pipe bending device and use method, which is suitable for manual pipe bending and straightening construction. BACKGROUND

[0002] In the shipbuilding process of a shipyard, generally, the pipes of all kinds of pipe systems on the ship are arranged in advance in design, and the production construction design is carried out according to the arrangement to design the lofting of each pipe. In theory, each pipe of all pipe lines can be lofted and made in advance, but due to the deformation of the ship structure welding, the deviation of the equipment base positioning, the position deviation caused by the installation precision of the equipment, the cumulative error of the lofting pipe production and installation, and many other inevitable factors, the pipe line cannot be lofted and made and installed in place, so in the actual design, in addition to the lofting pipe, a small amount of closing pipe is often used for on-site measurement to eliminate the installation problems of the pipe line caused by various errors.

[0003] When installing important systems such as ship valve remote control system, liquid level remote measurement system and hydraulic remote control system, compressed air or hydraulic oil power needs to be selected to control the action of these valves and equipment. In order to save energy consumption, these control systems basically select small-bore high-pressure pipe lines. Therefore, the valve remote control pipe, liquid level remote measurement pipe and other some remote hydraulic pipes all use small-bore pipes, and the outer diameter of the small-bore pipe is generally 15-22mm, and the selected pipe material is mainly red copper pipe and stainless steel pipe.

[0004] Due to the complex arrangement of these remote control pipes, the area involved is relatively large, and there are many devices, bases, ship structures, pipe lines and outfitting parts to be avoided, so these small-bore remote control pipes need to be bent a lot during production. Due to the complexity of the arrangement, these pipes often cannot be produced by lofting, and considering that there are many such pipes and it is more convenient to produce on site, generally, the shipyard does not perform lofting in advance, but adopts the method of bending and producing on site and arranging and installing on site.

[0005] But in the process of field production and installation, these small caliber pipes often need to be manually bent. For example, small caliber pipes made of red copper pipes are often arranged and installed in parallel with multiple remote control pipes, and are fixed with centralized pipe supports. During fixing, small pipe clamps are used to fix the red copper pipes in parallel on the centralized support. However, since they are arranged in parallel, the manual bending of each pipe needs to be standardized. Since the raw materials of red copper pipes are packaged in a disc shape before construction, and the arrangement of these small caliber pipes on the ship needs to avoid equipment, ship structure, outfitting parts and other needs for multiple turns, the small caliber pipes made of red copper pipe raw materials taken out of the reel need to be manually bent and straightened by construction personnel during production, installation and arrangement, especially in the straight part, which needs to be straightened. In this way, the layout can be standardized and the bending can be beautiful. In the past, pure manual bending and wooden hammer straightening were used, which was low in efficiency and the pipes produced were not beautiful. When several small caliber pipes are arranged in parallel in a centralized guide, it is more obvious that they are uneven and uneven. In addition, it is also laborious to use wooden hammers to straighten and arrange.

[0006] After retrieval, the Chinese invention patent document with the publication number CN110193535B discloses a metal bent pipe straightening equipment and a straightening method thereof. The metal bent pipe straightening equipment includes a rack, a first clamping device, a second clamping device, a rotating straightening device; the first clamping device and the second clamping device are respectively used for clamping the two end portions of the bent pipe; the rotating straightening device is provided with a moving assembly between the rack; the moving assembly is used for driving the rotating straightening device to move back and forth on the rack; the rotating straightening device includes a rotating straightening frame, a heating module, a rotating drive module and a straightening module; the heating module is arranged on the feed end side of the rotating straightening frame, and is used for heating the bent pipe; the rotating drive module is arranged in the middle of the rotating straightening frame; the straightening module is arranged on the rotating drive module; the rotating drive module is used for driving the straightening module to rotate, and the straightening module is used for straightening the bent pipe. However, the device has a complex structure and high production cost. The device is provided with a heating module, and the conventional firework heating softening pipe operation is adopted during bending and straightening. Therefore, the device faces the risk of fire during construction, and increases the risk of pipe damage caused by heating, which has certain limitations. SUMMARY

[0007] To solve the problems in the prior art described above, the present application aims to provide a small-bore red copper pipe and stainless steel pipe manual pipe bending device and use method, which is specially used for solving the manual pipe bending and straightening of small-bore pipes in the manufacturing and installation process of valve remote control pipes, liquid level remote sensing pipes and remote control hydraulic pipes on ships, has the characteristics of convenient operation, simple manufacturing and low cost, so as to replace the traditional original method of manual pipe bending and straightening by knocking with a wooden hammer, and one person can complete the construction, simplifying the difficulty of manual pipe bending and straightening and reducing the manufacturing cost and labor cost of small-bore pipes for ships. Through the device and method of the present application, the efficiency of manual pipe bending and straightening can be improved conveniently and effectively, the anding phenomenon of the manufactured pipe is beautiful, the efficient use of the device can eliminate the phenomenon that manual pipe bending is difficult and needs to be heated to soften the pipe, so that the manual pipe bending and straightening work becomes much easier, and the pipe does not need to be heated and bent again when the device is used, which not only greatly reduces the risk of fire during the construction process, but also saves the time of pipe bending and straightening and improves the efficiency, and in addition, the damage to the pipe caused by heating is also eliminated.

[0008] To achieve the above object and other related objects, the present application adopts the following technical solutions.

[0009] In a first aspect of the present application, a small-bore red copper pipe and stainless steel pipe manual pipe bending device is provided, which comprises a body, an operating assembly and a bore adjusting mechanism.

[0010] The body is a rectangular plate, a handle shaft hole and a pipe bending rotation groove are formed in the body, the pipe bending rotation groove is arc-shaped, the center of the arc of the pipe bending rotation groove coincides with the center of the handle shaft hole, a handle shaft is fixed in the handle shaft hole, the upper end surface of the handle shaft is flush with the upper end surface of the body, the lower end of the handle shaft extends out of the handle shaft hole, and a locking nut is arranged at the lower end of the handle shaft; an angle scale is arranged on the body, the angle scale is circular, the center of the angle scale coincides with the center of the handle shaft hole, and the 0° scale of the angle scale is on the same straight line as the central axis of the bore adjusting mechanism.

[0011] The operating assembly comprises a pipe bending handle, a ball bearing shaft and a ball bearing, a handle sleeve is fixed at the top end of the pipe bending handle, the handle sleeve is sleeved on the handle shaft and is limited by the locking nut, so that the pipe bending handle can rotate along the handle shaft axis, the ball bearing shaft penetrates through the pipe bending rotation groove, and the lower end of the ball bearing shaft is fixed vertically on the pipe bending handle, and a ball bearing is sleeved on the upper end of the ball bearing shaft.

[0012] The caliber adjusting mechanism comprises a buckle seat and a buckle block, the buckle seat is fixed to the upper end surface of the body and corresponds to the opening position of the handle rotating shaft hole, a limiting groove for clamping the buckle block is formed on the side of the buckle seat away from the body, the cross section of the limiting groove is dovetail type, the buckle block is clamped and fixed on the buckle seat through the limiting groove, and a positioning groove is formed on the upper end surface of the buckle block, the groove bottom width of the positioning groove is consistent with the outer diameter of the pipe.

[0013] In a second aspect, the application provides a method for using a small-caliber copper pipe and stainless steel pipe manual pipe bending device, which comprises the following steps,

[0014] S1, preparing the small-caliber copper pipe and stainless steel pipe manual pipe bending device;

[0015] S2, performing pipe bending operation:

[0016] S2-1, selecting the buckle block with the groove bottom width consistent with the outer diameter of the pipe according to the outer diameter of the pipe, and clamping and installing the buckle block on the buckle seat;

[0017] S2-2, placing the pipe into the positioning groove of the buckle block, so that the prepared bending point on one side of the pipe is close to the groove edge on the side of the 0° scale line of the positioning groove, and the ball bearing is located on the other side of the pipe;

[0018] S2-3, according to the target bending angle, the ball bearing is pressed against the pipe wall by pulling the pipe handle, and the force is continuously applied to the pipe until the pipe is bent to the angle scale line corresponding to the target bending angle;

[0019] S2-4, the pipe bending is completed, and the quality of the bent pipe is checked;

[0020] S3, performing straightening operation:

[0021] S3-1, selecting the buckle block with the groove bottom width consistent with the outer diameter of the pipe according to the outer diameter of the pipe, and clamping and installing the buckle block on the buckle seat;

[0022] S3-2, placing the pipe into the positioning groove of the buckle block, so that the bending point of the pipe is close to the groove edge on the side of the 0° scale line of the positioning groove, and the angle of the pipe is adjusted so that the inner angle of the bending of the pipe faces the ball bearing;

[0023] S3-3, the ball bearing is pressed against the pipe wall by pulling the pipe handle, and the force is continuously applied to the pipe until the pipe is bent to the 0° scale line of the angle scale line;

[0024] S3-4, the straightening is completed, and the quality of the straightened pipe is checked.

[0025] As a preferred technical solution, the specific preparation steps of step S1 are as follows:

[0026] S1-1, processing the body and caliber adjustment mechanism, and marking angle scale on the body;

[0027] S1-2, fixing the handle shaft and caliber adjustment mechanism on the body;

[0028] S1-3, installing the operation assembly on the body, so that the ball bearing in the elbow rotating groove can slide along the elbow rotating groove with the pulling of the elbow handle.

[0029] Further, the specific steps of step S1-1 include: opening a handle shaft hole on the body, opening an arc-shaped elbow rotating groove with the handle shaft hole center as the center, and drawing a circular angle scale on the upper end surface of the body with the handle shaft hole center as the center; according to the outer diameter of the pipe, processing the caliber adjustment mechanism, so that the groove bottom width of the caliber adjustment mechanism is consistent with the outer diameter of the pipe.

[0030] Further, the specific steps of step S1-2 include: inserting the handle shaft into the handle shaft hole from the lower end surface of the body, welding and fixing the upper end of the handle shaft flush with the upper end surface of the body, and welding and fixing the caliber adjustment mechanism on the upper end surface of the body, so that the center axis of the caliber adjustment mechanism is on the same straight line with the 0° scale of the angle scale.

[0031] Further, the specific steps of step S1-3 include: welding and fixing the handle sleeve on the top end of the elbow handle, and welding and fixing the ball bearing shaft on the upper end surface of the elbow handle, so that the center axis of the handle sleeve is parallel to the center axis of the ball bearing shaft; limiting the handle sleeve on the handle shaft through the locking nut at the end of the handle shaft, and at the same time, the ball bearing shaft passes through the elbow rotating groove and the ball bearing is sleeved on the upper end of the ball bearing shaft, so that the ball bearing in the elbow rotating groove slides along the elbow rotating groove with the pulling of the elbow handle.

[0032] As a preferred technical solution, in step S2-3, according to the target bending angle and the outer diameter of the pipe, the appropriate ball bearing is calculated and replaced, and the elbow handle is pulled until the center axis of the elbow handle coincides with the 0° scale.

[0033] As a further preferred technical solution, the step S1-1 further comprises: a calibration line extending to the body edge is drawn at the position corresponding to the 0° scale line of the angle scale line, the upper end surface of the bending handle is drawn with a cross positioning line, when the central axis of the bending handle coincides with the 0° scale line, the horizontal line in the cross positioning line coincides with the calibration line, and the vertical line in the cross positioning line coincides with the body edge; in the step S2-4, the bending pipe quality is checked through the calibration line and the cross positioning line; in the step S3-4, the straightening pipe quality is checked through the calibration line.

[0034] As a preferred technical solution, in the steps S2-1 and S3-1, when the pipe length is less than the distance from the handle rotating shaft hole to the center line of the circular arc-shaped groove, a buckle block with a proper length is selected according to the pipe length and installed on the buckle seat, the length of the selected buckle block is greater than the length of the buckle seat, and there is a gap between the selected buckle block and the ball bearing after the buckle block is installed on the buckle seat.

[0035] As described above, the present application has the following beneficial effects:

[0036] The present application provides a small-diameter copper pipe and stainless steel pipe manual bending device and use method, effectively solves the problem of non-standardization in traditional manual bending operation and deformation of the pipe caused by using a wooden hammer to straighten. Through the device of the present application, the working efficiency of manual bending and straightening can be efficiently improved, while the appearance, smoothness and standardization of the pipe are ensured.

[0037] In addition, the device of the present application avoids the laborious and firework heating softening of the pipe during manual bending, greatly reducing the labor intensity. Using the device of the present application, heating treatment of the pipe is no longer needed, thereby reducing the risk of fire during construction, avoiding damage to the pipe caused by heating, and at the same time, through the cooperation of the angle scale line, the calibration line and the cross positioning line, the difficulty of manual bending and straightening is reduced, the time for bending and straightening the pipe is saved, the working efficiency is improved, and the manufacturing cost of the pipe is reduced.

[0038] The device of the present application is simple to manufacture and low in cost, simplifies the difficulty of manual bending and straightening, and can be completed by a single person, is convenient to operate and simple to use, and is suitable for manual bending and straightening of small-diameter pipes on ships, such as installation and arrangement of remote control hydraulic pipes, liquid level remote sensing pipes and valve remote control pipes. The device of the present application can be repeatedly used and is not easy to be damaged.

[0039] In addition, the device of the present application is also designed with buckle blocks that can match pipes with different outer diameters, and can be quickly adjusted through the clamping design, so as to adapt to pipes with different outer diameters for bending and straightening, and increase the universality and applicability of the device.

[0040] In summary, the manual pipe bending device and the using method ensure the production specification of small-diameter pipes, the beautiful arrangement, the labor-saving construction, realize the simple operation and the convenient use, and greatly improve the construction efficiency and the safety. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 is the operation schematic diagram when the pipe is bent by the device.

[0042] Figure 2 is the front view of the overall assembly structure of the device.

[0043] Figure 3 is Figure 1 is the right view of the caliber adjusting mechanism at A-A in the figure.

[0044] Figure 4 is the operation schematic diagram when the pipe is straightened and the pipe is straightened to 0 degrees.

[0045] Figure 5 is the top view of the buckle seat.

[0046] Figure 6 is the front view of the buckle seat.

[0047] In the figure, the reference signs are specifically described as follows: 1, the body; 11, the handle rotating shaft hole; 12, the handle rotating shaft; 13, the locking nut; 14, the pipe bending rotating groove; 15, the angle scale line; 21, the pipe bending handle; 22, the handle sleeve; 23, the ball bearing rotating shaft; 24, the ball bearing; 3, the caliber adjusting mechanism; 31, the buckle seat; 32, the limiting groove; 33, the buckle block; 34, the positioning groove; 4, the pipe. DETAILED DESCRIPTION

[0048] In order to better understand the purpose, structure and function of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all.

[0049] In the description of the present application, it should be noted that the position relationship indicated in the specification, such as "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the position relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular direction, and therefore cannot be understood as a limitation of the present application. Embodiment 1

[0050] AsFigures 1-6 As shown, this embodiment provides a manual pipe bending device for small-diameter copper pipes and stainless steel pipes, which is suitable for bending and straightening small-diameter pipes during production and installation. The device needs to be used in pairs and includes a main body 1, an operating component and a diameter adjustment mechanism 3.

[0051] The main body 1 is a rectangular plate, and the rectangular plate is made of a steel plate with a specification of 250mm*150mm*10mm. A handle shaft hole 11 and a bend pipe rotation groove 14 are provided on the main body 1. The handle shaft hole 11 is a circular through hole, and the diameter of the handle shaft hole 11 is 10mm. The bend pipe rotation groove 14 is arc-shaped, and the arc angle range is 120 degrees. The arc center of the bend pipe rotation groove 14 coincides with the center of the handle shaft hole 11, and the distance between the bend pipe rotation groove 14 and the center of the handle shaft hole 11 is 40mm, and the width of the bend pipe rotation groove 14 is 8mm. A handle shaft 12 is fixed in the handle shaft hole 11, and the upper end face of the handle shaft 12 is flush with the upper end face of the main body 1 and is fixed to the main body 1 by welding. The lower end of the handle shaft 12 extends outside the handle shaft hole 11, and the lower end of the handle shaft 12 is provided with a thread and is equipped with a locking nut 13; Figure 1 As shown, the main body 1 is marked with angle scale lines 15, which are circular. The center of the angle scale lines 15 coincides with the center of the handle shaft hole 11 and the radius is 60-65 mm. The 0° scale line of the angle scale lines 15 is on the same straight line as the central axis of the caliber adjustment mechanism 3.

[0052] like Figure 2 As shown, the operating component includes a bending handle 21, a ball bearing shaft 23 and a ball bearing 24. A handle sleeve 22 is fixed to the top of the bending handle 21. The handle sleeve 22 is sleeved in the handle shaft 12 and limited by a locking nut 13, so that the bending handle 21 can rotate along the axis of the handle shaft 12. The ball bearing shaft 23 passes through the bending rotation groove 14 and the lower end of the ball bearing shaft 23 is vertically fixed to the bending handle 21. The central axis of the handle sleeve 22 is parallel to the central axis of the ball bearing shaft 23, and the upper end of the ball bearing shaft 23 exposed from the upper end surface of the main body 1 is sleeved with a ball bearing 24.

[0053] like Figures 1-3As shown, the caliber adjusting mechanism 3 includes a buckle seat 31 and a buckle block 33, the buckle seat 31 is fixed to the upper end surface of the body 1 and corresponds to the opening position of the handle rotating shaft hole 11, the buckle seat 31 is provided with a limiting groove 32 for clamping the buckle block 33 on the side away from the body 1, the cross section of the limiting groove 32 is dovetail type, the length of the limiting groove 32 is 50mm, the buckle block 33 is clamped and inserted into the limiting groove 32 of the buckle seat 31 through the limiting groove 32, the buckle block 33 is wedge-shaped fastening connection with the buckle seat 31, the upper end surface of the buckle block 33 is provided with a positioning groove 34, the groove bottom width of the positioning groove 34 is consistent with the outer diameter of the pipe 4, according to the different outer diameters of the pipes 4 to be bent, the buckle block 33 with different groove bottom width of the positioning groove 34 is made to match the pipes 4 with different outer diameters, the length of the positioning groove 34 is 50-60mm, which can avoid the risk of the buckle block 33 popping out when the pipe is stressed. Example 2

[0054] The embodiment provides a use method of a manual pipe bending device for small caliber red copper pipe and stainless steel pipe of example 1, which is applied to small caliber red copper pipe or stainless steel pipe and includes the following steps.

[0055] S1, prepare the manual pipe bending device for small caliber red copper pipe and stainless steel pipe of example 1, complete the manufacture and fixation of the device by processing and welding:

[0056] S1-1, process the body 1 and the caliber adjusting mechanism 3 by opening and slotting, and mark the angle scale line 15 on the body 1.

[0057] In the embodiment, the rectangular plate serving as the body 1 adopts a steel plate with a specification of 250mm*150mm*10mm, the handle rotating shaft hole 11 is opened on the steel plate, the handle rotating shaft hole 11 is a circular through hole with a diameter of 10mm; the pipe bending rotating groove 14 is opened on the steel plate at a position about 40mm away from the center of the handle rotating shaft hole 11, the pipe bending rotating groove 14 is arc-shaped, the angle of the arc formed by the pipe bending rotating groove 14 is 120 degrees, and the width of the pipe bending rotating groove 14 is 8mm; a circle with a radius of 60-65mm is drawn on the steel plate with the handle rotating shaft hole 11 as the center, and the circular angle scale line 15 is drawn. According to the outer diameter of the pipe 4, the caliber adjusting mechanism 3 is processed, so that the groove bottom width of the caliber adjusting mechanism 3 is consistent with the outer diameter of the pipe 4, and the stability of the pipe 4 placed in the caliber adjusting mechanism 3 is ensured.

[0058] In another embodiment, a calibration line extending to the edge of the steel plate is marked at the corresponding position of the 0° scale line of the angle scale line 15, the upper end surface of the bending handle 21 is marked with a cross positioning line, when the central axis of the bending handle 21 coincides with the 0° scale line, the horizontal line in the cross positioning line coincides with the calibration line, and the vertical line in the cross positioning line coincides with the edge of the body 1, thereby improving the accuracy during bending and straightening, and in the subsequent step S2-4, the effect of the fixed bending can be verified according to the coincidence of the cross positioning line with the calibration line and the edge of the body 1 during the bending operation, and in the subsequent step S3-4, the effect of the straightening of the pipe 4 can be verified according to the coincidence of the pipe 4 with the calibration line and the perpendicularity of the end surface of the pipe 4 with the calibration line during the straightening operation.

[0059] S1-2, fixing the handle rotating shaft 12 and the caliber adjusting mechanism 3 on the body 1:

[0060] After inserting the prepared handle rotating shaft 12 into the handle rotating shaft hole 11 from the lower end surface of the steel plate and making the upper end of the handle rotating shaft 12 flush with the upper end surface of the steel plate, welding and fixing are performed; the caliber adjusting mechanism 3 is welded and fixed on the upper end surface of the steel plate, so that the central axis of the caliber adjusting mechanism 3 is located on the same straight line as the 0° scale line of the angle scale line 15.

[0061] S1-3, processing the operation assembly and installing the operation assembly on the body 1:

[0062] As shown in Figure 2 , the handle sleeve 22 is welded and fixed on the top end of the bending handle 21, and the handle sleeve 22 is sleeved on the handle rotating shaft 12, the handle sleeve 22 is limited on the handle rotating shaft 12 by screwing the locking nut 13 at the end of the handle rotating shaft 12, after adjusting the position of the bending handle 21 to the position of the 0° scale line, the locking nut 13 can be further tightened to fix the bending handle 21, so as to facilitate the welding and fixing between the ball bearing rotating shaft 23 and the bending handle 21; the lower end of the ball bearing rotating shaft 23 is welded and fixed vertically on the upper end surface of the bending handle 21, so that the central axis of the handle sleeve 22 is parallel to the central axis of the ball bearing rotating shaft 23, the ball bearing rotating shaft 23 passes through the bending rotation groove 14, the ball bearing 24 is sleeved on the upper end of the ball bearing rotating shaft 23, and the ball bearing 24 is tightly held on the ball bearing rotating shaft 23, the movable connection between the operation assembly and the body 1 is completed, and the ball bearing 24 located in the bending rotation groove 14 can slide and move along the bending rotation groove 14 under the pulling of the bending handle 21.

[0063] S2, during the bending operation:

[0064] S2-1, according to the outer diameter of the pipe 4, select the appropriate buckle block 33, the groove bottom width of the buckle block 33 is consistent with the outer diameter of the pipe 4, and the buckle block 33 is installed in the buckle seat 31. Specifically, when the outer diameter of the pipe 4 is 22mm, the buckle block 33 with a groove bottom width of 22mm is installed on the buckle seat 31; when the outer diameter of the pipe 4 is 15mm, the buckle block 33 with a groove bottom width of 15mm is installed on the buckle seat 31.

[0065] When the length of the pipe 4 is less than the distance from the handle shaft hole 11 to the center line of the circular arc of the arc-shaped groove, according to the length of the pipe 4, select the appropriate length of the buckle block 33 and install it on the buckle seat 31, the length of the selected buckle block 33 is greater than the length of the buckle seat 31, and after the buckle block 33 is installed in the buckle seat 31, there is a gap between the buckle block 33 and the ball bearing 24, so that the bending pipe requirement of the shorter pipe 4 can be met, and the uniform stress during bending can be ensured.

[0066] S2-2, put the pipe 4 into the positioning groove 34 of the buckle block 33, so that the prepared bending point on one side of the pipe 4 is close to the groove edge of the positioning groove 34 towards the 0 degree side, and the ball bearing 24 is located on the other side of the pipe 4.

[0067] S2-3, temporarily fix the pipe 4 in the positioning groove 34 with a tool or one side of the hand, according to the target bending angle, the other side of the hand drives the ball bearing 24 to abut against the pipe wall of the pipe 4 by pulling the bending pipe handle 21, and continues to apply force to the pipe 4 until the pipe 4 is bent to the angle scale line 15 corresponding to the target bending angle.

[0068] In order to ensure the bending quality of small caliber red copper pipe and stainless steel pipe, the pipe 4 with large target bending angle is bent twice to the position, the first time is bent to about 70% of the target bending angle, and the second time is bent to the target bending angle.

[0069] In this embodiment, by pulling the bending pipe handle 21 until the pipe 4 is bent to the center axis of the bending pipe handle 21 and the 0° scale line, it can be ensured that the same outer diameter ball bearing 24 is used to bend the pipe 4 with the same outer diameter, and the target bending angle of the bent pipe is obtained each time, avoiding the operation of confirming the angle many times during bending, and improving the batch bending efficiency under the same target bending angle. Therefore, in the step of repeatedly bending the bending pipe handle 21 until the center axis of the bending pipe handle 21 and the 0° scale line coincide, by replacing the ball bearing 24 with different outer diameters, the bending angle can be changed.

[0070] S2-4, the bending is finished, and the bending quality is checked.

[0071] S3, when straightening operation is performed:

[0072] S3-1, according to the outer diameter of the pipe 4, select the buckle block 33 with the same width as the outer diameter of the pipe 4, and install the buckle block 33 in the buckle seat 31.

[0073] When the length of the pipe 4 is less than the distance from the handle shaft hole 11 to the center line of the arc-shaped groove, according to the length of the pipe 4, select the appropriate length of the buckle block 33 and install it on the buckle seat 31, the length of the selected buckle block 33 is greater than the length of the buckle seat 31, and after the buckle block 33 is installed in the buckle seat 31, there is a gap between the buckle block 33 and the ball bearing 24, so that the straightening requirement of the shorter pipe 4 can be met, and the uniform stress during straightening is ensured.

[0074] S3-2, put the pipe 4 into the positioning groove 34 of the buckle block 33, make the bending point of the pipe 4 close to the groove edge of the positioning groove 34 on the side of the 0° scale line, and adjust the angle of the pipe 4, so that the bending inner angle of the pipe 4 faces the ball bearing 24.

[0075] S3-3, pull the pipe handle 21 to make the ball bearing 24 abut against the pipe wall of the pipe 4, and continue to apply force to the pipe 4 until the pipe 4 is bent to the 0° scale line of the angle scale line 15.

[0076] S3-4, check the quality of the straightened pipe 4:

[0077] Pull the pipe 4 away from the 0° scale line, and further confirm the straightening effect of the pipe 4 through the positioning groove 34 of the buckle block 33, if it cannot be pulled out, the pipe 4 is still bent, observe the position of the pipe 4 clamped in the positioning groove 34, adjust the bending inner angle of the pipe 4 to face the ball bearing 24, and then pull the pipe handle 21 again.

[0078] By using the method of the device, one person can complete the bending and straightening operation, which is simple; in addition, since the total weight of the device is about 15 kg, it is also convenient to carry and store.

[0079] Before the bending operation in step S2 or the straightening operation in step S3, the body 1 of the device can be temporarily fixed on the operation platform, in an embodiment, the device is fixed on the operation platform by spot welding; in another embodiment, the upper and lower sides of the body 1 of the device are provided with symmetrical fixing members, the fixing members are clamps provided with adjusting bolts, and the clamps can be quickly disassembled on the operation platform by cooperating with the adjusting bolts, which has wide applicability and further improves the stability during bending.

[0080] The above description is merely that of the preferred embodiments of the application, and is not intended to limit the application. One skilled in the art will readily devise variations and modifications of these embodiments without departing from the spirit and scope of the application as defined by the appended claims. In addition, the features and embodiments described can be modified to adapt them to specific situations and materials without departing from the spirit and scope of the present application. Therefore, the application is not limited by the specific embodiments described herein, but only by the claims that follow, the intent being to claim all embodiments falling within the scope of the claims.

Claims

1. A method for using a manual pipe bending device for small-caliber copper pipes and stainless steel pipes, characterized in that: The following steps are involved: S1. Prepare a manual pipe bending device for small-diameter copper pipes and stainless steel pipes; The device comprises a body (1), an operating assembly and a caliber adjustment mechanism (3); The body (1) is a rectangular plate, and a handle shaft hole (11) and a bend pipe rotation groove (14) are provided on the body (1), the bend pipe rotation groove (14) is arc-shaped, and the arc center of the bend pipe rotation groove (14) coincides with the center of the handle shaft hole (11), a handle shaft (12) is fixed in the handle shaft hole (11), the upper end surface of the handle shaft (12) is flush with the upper end surface of the body (1), the lower end of the handle shaft (12) extends outside the handle shaft hole (11), and the lower end of the handle shaft (12) is provided with a locking nut (13); an angle scale line (15) is provided on the body (1), the angle scale line (15) is circular, the center of the angle scale line (15) coincides with the center of the handle shaft hole (11), and the 0° scale line of the angle scale line (15) is on the same straight line as the central axis of the caliber adjustment mechanism (3); The operating assembly comprises a bending pipe handle (21), a ball bearing shaft (23) and a ball bearing (24); a handle sleeve (22) is fixed to the top of the bending pipe handle (21); the handle sleeve (22) is sleeved in the handle shaft (12) and limited by a locking nut (13), so that the bending pipe handle (21) can rotate along the axis of the handle shaft (12); the ball bearing shaft (23) passes through the bending pipe rotation groove (14) and the lower end of the ball bearing shaft (23) is vertically fixed to the bending pipe handle (21); and the upper end of the ball bearing shaft (23) is sleeved with a ball bearing (24); The caliber adjustment mechanism (3) includes a snap seat (31) and a snap block (33), wherein the snap seat (31) is fixed to the upper end surface of the body (1) and corresponds to the opening position of the handle shaft hole (11), and a limiting groove (32) for locking the snap block (33) is provided on a side of the snap seat (31) away from the body (1), wherein the cross section of the limiting groove (32) is dovetail-shaped, and the snap block (33) is fixed to the snap seat (31) by locking the limiting groove (32), and a positioning groove (34) is provided on the upper end surface of the snap block (33), wherein the bottom width of the positioning groove (34) is consistent with the outer diameter of the tube (4); S2. Perform pipe bending operation: S2-1. According to the outer diameter of the pipe (4), select a buckle block (33) whose groove bottom width is consistent with the outer diameter of the pipe (4), and install the buckle block (33) on the buckle seat (31); S2-2, placing the tube (4) into the positioning groove (34) of the buckle block (33), so that the preparatory bending point on one side of the tube (4) is close to the groove edge of the positioning groove (34) facing the 0° scale line, and the ball bearing (24) is located on the other side of the tube (4); S2-3, according to the target bending angle, the ball bearing (24) is pressed against the wall of the tube (4) by turning the tube bending handle (21), and force is continuously applied to the tube (4) until the tube (4) is bent to the angle scale line (15) corresponding to the target bending angle; S2-4, after the pipe bending is completed, check the quality of the bent pipe (4); S3. Perform straightening operation: S3-1. According to the outer diameter of the pipe (4), select a buckle block (33) whose groove bottom width is consistent with the outer diameter of the pipe (4), and install the buckle block (33) on the buckle seat (31); S3-2, placing the tube (4) into the positioning groove (34) of the buckle block (33), so that the bending point of the tube (4) is close to the groove edge of the positioning groove (34) facing the 0° scale line, and adjusting the angle of the tube (4) so ​​that the inner bending angle of the tube (4) faces the ball bearing (24); S3-3, by turning the pipe bending handle (21), the ball bearing (24) is pressed against the wall of the pipe (4), and force is continuously applied to the pipe (4) until the pipe (4) is bent to the 0° mark of the angle scale (15); S3-4. After straightening is completed, check the quality of the straightened pipe (4).

2. The method for using a manual pipe bending device for small-diameter copper pipes and stainless steel pipes according to claim 1, characterized in that: The specific preparation steps of step S1 are as follows: S1-1, processing the body (1) and the aperture adjustment mechanism (3), and marking angle scale lines (15) on the body (1); S1-2, fixing the handle shaft (12) and the caliber adjustment mechanism (3) on the body (1); S1-3. Install the operating assembly on the body (1) so that the ball bearing (24) located in the elbow rotation groove (14) can slide and move along the elbow rotation groove (14) as the elbow handle (21) is pulled.

3. The method for using a manual pipe bending device for small-diameter copper pipes and stainless steel pipes according to claim 2, characterized in that: The specific steps of step S1-1 include: opening a handle shaft hole (11) on the body (1), opening an arc-shaped pipe-bending rotation groove (14) with the center of the handle shaft hole (11) as the center of the circle, and drawing a circular angle scale line (15) on the upper end surface of the body (1) with the center of the handle shaft hole (11) as the center of the circle; and processing the caliber adjustment mechanism (3) according to the outer diameter of the pipe (4) so ​​that the groove bottom width of the caliber adjustment mechanism (3) is consistent with the outer diameter of the pipe (4).

4. The method for using a manual pipe bending device for small-diameter copper pipes and stainless steel pipes according to claim 2, characterized in that: The specific steps of step S1-2 include: inserting the handle shaft (12) from the lower end surface of the body (1) into the handle shaft hole (11), making the upper end of the handle shaft (12) flush with the upper end surface of the body (1), and then welding and fixing; welding and fixing the caliber adjustment mechanism (3) to the upper end surface of the body (1), making the central axis of the caliber adjustment mechanism (3) and the 0° scale line of the angle scale line (15) on the same straight line.

5. The method for using a manual pipe bending device for small-diameter copper pipes and stainless steel pipes according to claim 2, characterized in that: The specific steps of step S1-3 include: welding a fixed handle sleeve (22) at the top end of the bending pipe handle (21), and welding a fixed ball bearing shaft (23) at the upper end surface of the bending pipe handle (21) so that the central axis of the handle sleeve (22) is parallel to the central axis of the ball bearing shaft (23); limiting the handle sleeve (22) on the handle shaft (12) by a locking nut (13) at the end of the handle shaft (12), and at the same time, the ball bearing shaft (23) passes through the bending pipe rotation groove (14) and a ball bearing (24) is sleeved on the upper end of the ball bearing shaft (23), so that the ball bearing (24) located in the bending pipe rotation groove (14) slides along the bending pipe rotation groove (14) as the bending pipe handle (21) is pulled.

6. The method for using a manual pipe bending device for small-diameter copper pipes and stainless steel pipes according to claim 1, characterized in that: In step S2-3, a suitable ball bearing (24) is calculated and replaced according to the target bending angle and the outer diameter of the tube (4), and the tube bending handle (21) is turned until the tube (4) is bent until the center axis of the tube bending handle (21) coincides with the 0° scale line.

7. The method for using a manual pipe bending device for small-diameter copper pipes and stainless steel pipes according to claim 2, characterized in that: The step S1-1 further includes: engraving a calibration line extending to the edge of the body (1) at a position corresponding to the 0° scale line of the angle scale line (15), and engraving a cross positioning line on the upper end surface of the bending handle (21), and when the center axis of the bending handle (21) coincides with the 0° scale line, the horizontal line in the cross positioning line coincides with the calibration line, and the vertical line in the cross positioning line coincides with the edge of the body (1); in the step S2-4, checking the quality of the bending tube (4) by using the calibration line and the cross positioning line; and in the step S3-4, checking the quality of the straightening tube (4) by using the calibration line.

8. The method for using a manual pipe bending device for small-diameter copper pipes and stainless steel pipes according to claim 1, characterized in that: In the steps S2-1 and S3-1, when the length of the tube (4) is less than the distance from the handle shaft hole (11) to the center line of the arc of the arc groove, a snap block (33) of appropriate length is selected according to the length of the tube (4) and installed on the snap seat (31). The length of the selected snap block (33) is greater than the length of the snap seat (31), and a gap exists between the snap block (33) and the ball bearing (24) after the snap block (33) is snap-fitted and installed in the snap seat (31).

Images