Pipe fitting reaming device

Abstract

The invention discloses a pipe fitting chambering device, which belongs to the technical field of chambering devices and comprises a worktable, a clamping mechanism, a chambering mechanism and a driving mechanism. The clamping mechanism firmly fixes the pipe fitting, and it is ensured that the reaming process is stable. And the reaming mechanism adopts a plurality of reaming columns with increasing diameters, grading reaming is carried out on the pipe fitting in sequence through movement of the sliding block on the driving mechanism, stress is effectively dispersed, and cracking of the pipe fitting is prevented. An arc-shaped column is designed at the end of the reaming column, circumferentially-arranged nozzles are installed on the arc-shaped column, the nozzles reversely spray lubricating liquid to the contact face of the pipe fitting and the reaming column, sufficient lubrication in the reaming process is guaranteed, friction damage is reduced, and the reaming efficiency is improved. In addition, an oil supply cavity is formed in the workbench, lubricating liquid is provided for the nozzle through an oil pump and an oil supply pipe, and automatic lubrication is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of hole expanding devices, and in particular to a pipe hole expanding device. Background Art

[0002] When two pipes of the same diameter need to be connected safely and efficiently, the traditional reaming method often uses a single columnar reaming tool to be directly inserted into the pipe to expand its caliber. However, this method has significant disadvantages: due to the large single reaming amplitude, the pipe mouth material often suffers from excessive stress and cracks; at the same time, in order to reduce the friction during the reaming process, although lubricating liquid is injected from the outside into the contact surface between the pipe and the reaming column, due to the close fit between the two, the lubricating liquid is easily squeezed to the outside and is difficult to enter the connection position between the pipe and the reaming column, thereby greatly reducing the lubrication effect. To this end, the present invention provides a pipe reaming device that can solve the above problems. Summary of the invention

[0003] In view of the above-mentioned technical deficiencies, the purpose of the present invention is to provide a pipe reaming device that can lubricate the connection position from the inside to improve the lubrication effect.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solution: The present invention provides a pipe expansion device, comprising a workbench, on which is installed: A clamping mechanism, which can fix the pipe fitting on the workbench; The hole-expanding mechanism comprises a movable slider, on which a plurality of hole-expanding columns are mounted, wherein the diameters of the plurality of hole-expanding columns are arranged in ascending order of size, and during the movement of the slider, the plurality of hole-expanding columns can be aligned in sequence and act on the pipe fixed by the clamping mechanism; A driving mechanism, wherein the slider is slidably mounted on the driving mechanism; Among them, an arc column is provided at the end of the expansion column, and a nozzle capable of spraying lubricating fluid is provided at the end of the arc column. There are multiple nozzles and the multiple nozzles are circumferentially arranged on the expansion column, and the spraying direction of the nozzle is toward the surface of the arc column.

[0005] Preferably, an oil supply cavity is provided inside the workbench, an oil supply pipe is installed on the slider, one end of the oil supply pipe is connected to the nozzle, and the other end is connected to the oil supply cavity, and an oil pump for providing oil pumping power to the oil supply pipe is fixed on the slider.

[0006] Preferably, a liquid outlet head is provided at the end of the arc column, the diameter of the liquid outlet head is smaller than the diameter of the pipe fitting, an annular curved surface is provided on the liquid outlet head, a plurality of mounting holes corresponding to the nozzles are provided on the annular curved surface, the nozzles are installed in the corresponding mounting holes, and the nozzles are connected to the mounting holes through a spherical surface.

[0007] Preferably, a connecting tube is fixed to the tail of the nozzle, a clearance groove for the connecting tube to move is provided inside the liquid outlet head, and the connecting tube is connected to the oil supply pipe through a hose.

[0008] Preferably, the clamping mechanism comprises: A first clamping plate and a second clamping plate, wherein the first clamping plate is fixed on a workbench, and the second clamping plate is slidably installed on the workbench, a clamping hole for clamping a pipe fitting is provided at a connecting position of the first clamping plate and the second clamping plate, and a transverse plate is fixed on the first clamping plate, and a groove is provided on the transverse plate.

[0009] Preferably, the number of the hole-expanding columns is three, and the axes of the three hole-expanding columns are on the same horizontal plane, and the first clamping plate and the second clamping plate are both provided with clearance holes adapted to the hole-expanding columns.

[0010] Preferably, the driving mechanism comprises a support plate, the slider is slidably mounted on the support plate, a first screw is rotatably mounted inside the workbench, and a screw hole meshing with the first screw is provided on the support plate.

[0011] Preferably, a second screw rod is rotatably mounted inside the support plate, and a screw hole meshing with the second screw rod is provided on the sliding block.

[0012] Preferably, a support body is fixed on the workbench, a positioning block is slidably mounted on the support body, and the positioning block is arranged at the end of the transverse plate.

[0013] The beneficial effects of the present invention are: Compared with the prior art that "it is difficult for the lubricating liquid to enter the connection position between the pipe fitting and the reaming column", the present invention mainly provides a solution of "lubricating the reaming position from the inside of the reaming column and the pipe fitting", which specifically includes: the diameter of the end of the reaming column is reduced so that it can penetrate into the pipe fitting smoothly and unimpeded. Nozzles are installed inside the reaming column, and the spraying directions of these nozzles are set in reverse, directly aiming at the key area where the pipe fitting and the reaming column are about to contact. In this way, when the reaming column penetrates deeper, the lubricating liquid can be sprayed to the contact position instantly and accurately, ensuring that the contact surface between the pipe fitting and the reaming column is fully lubricated. It not only simplifies the reaming process, but also significantly improves the smoothness of reaming, reducing damage or resistance problems that may be caused by excessive friction.

[0014] Compared with the prior art that "a single expansion is large, causing the pipe mouth material to be subjected to excessive stress and cracking", the present invention mainly provides a solution of "installing multiple expansion columns distributed at intervals on the expansion mechanism". By using multiple expansion columns with gradually increasing diameters, the pipe mouth of the pipe fitting is gradually expanded. This progressive processing method effectively reduces the risk of cracking of the pipe fitting due to stress concentration during the expansion process by decomposing the large-scale pipe mouth deformation that may have occurred into multiple small, continuous deformation stages. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The structure diagram of the pipe expansion device is shown in FIG. Figure 1 .

[0016] Figure 2 The structure diagram of the pipe expansion device is shown in FIG. Figure 2 .

[0017] Figure 3 It is a cross-sectional view of the clamping mechanism and the driving mechanism of the present invention.

[0018] Figure 4 This is a top view of the pipe expansion device.

[0019] Figure 5 It is a cross-sectional view of the workbench and drive mechanism.

[0020] Figure 6 For the present invention Figure 5 Cross-sectional view along the AA direction.

[0021] Figure 7 This is an internal diagram of the expanded hole column of the present invention.

[0022] Figure 8 For the present invention Figure 7 Enlarged view of point B in .

[0023] In the figure: 1. workbench, 101. oil supply chamber, 102. first screw, 103. support body, 104. positioning block; 2. Clamping mechanism, 201. First clamping plate, 202. Second clamping plate, 203. Transverse plate; 3. Hole expansion mechanism; 301. Hole expansion column; 3011. Nozzle; 3012. Liquid outlet head; 3013. Arc column; 3014. Connecting pipe; 3015. Hose; 302. Sliding block; 303. Oil supply pipe; 4. Driving mechanism, 401. Support plate, 402. Second screw. DETAILED DESCRIPTION

[0024] The present invention is described below with specific embodiments, but they are not intended to be limiting of the invention.

[0025] Embodiment 1 like Figure 1-Figure 5 As shown, in this embodiment, a pipe reaming device is provided, comprising a workbench 1, on which are mounted: a clamping mechanism 2, a reaming mechanism 3 and a driving mechanism 4. The clamping mechanism 2 can fix the pipe on the workbench 1. In this embodiment, the clamping mechanism 2 can be designed with two relatively sliding clamping plates, each of which is provided with a groove adapted to the diameter of the pipe. When the two clamping plates move relatively and dock together, the pipe can be firmly clamped in the groove, thereby completing the fixing work of the pipe.

[0026] The hole expansion mechanism 3 includes a movable slider 302, on which a plurality of hole expansion columns 301 are mounted. The diameters of the plurality of hole expansion columns 301 are arranged in increasing order of size. When performing hole expansion operations, in order to ensure that the pipe mouth is not damaged during the expansion process, such as to avoid the occurrence of adverse conditions such as cracking, a strategy of multiple hole expansions in steps is usually adopted. In this process, the pipe hole is expanded in sequence by using a plurality of hole expansion columns 301 with gradually increasing diameters, aiming to make the pipe mouth material evenly and gradually adapt to the expansion force by gradually increasing the aperture, thereby significantly reducing the risk of damage to the pipe mouth and ensuring the safety of the hole expansion work. During the movement of the slider 302, the plurality of hole expansion columns 301 can be aligned in sequence and act on the pipe fixed by the clamping mechanism 2. When the hole expansion column 301 is moved to a position aligned with the pipe, the two are precisely on the same axis to ensure that the hole expansion operation can proceed smoothly.

[0027] The slider 302 is slidably mounted on the driving mechanism 4, and the driving mechanism 4 can accurately guide the slider 302 to move along the axial direction of the pipe fitting, ensuring that the reaming column 301 carried by the slider 302 is accurately aligned and penetrates into the pipe fitting. As the slider 302 continues to move forward, the reaming column 301 gradually extends into the pipe fitting, thereby performing the reaming operation on the pipe fitting; the driving mechanism 4 includes a support plate 401, the slider 302 is slidably mounted on the support plate 401, and a first screw rod 102 is rotatably mounted inside the workbench 1, and a screw hole meshing with the first screw rod 102 is provided on the support plate 401. A motor for driving the first screw rod 102 to rotate is fixed on the workbench 1, and the motor drives the first screw rod 102 to rotate, which can drive the support plate 401 to slide on the workbench 1. A second screw rod 402 is rotatably installed inside the support plate 401, and a screw hole engaging with the second screw rod 402 is provided on the slider 302. A motor for driving the second screw rod 402 to rotate is fixed on the support plate 401. The motor drives the second screw rod 402 to rotate, and can drive the slider 302 to slide arbitrarily on the support plate 401.

[0028] Among them, the end of the reaming column 301 is provided with an arc column 3013, and the end of the arc column 3013 is provided with a nozzle 3011 capable of spraying lubricating liquid. There are multiple nozzles 3011 and the multiple nozzles 3011 are arranged circumferentially on the reaming column 301. The spraying direction of the nozzle 3011 is toward the contact position between the pipe fitting and the arc column 3013. The spraying direction of the nozzle 3011 is set to be opposite to the direction in which the reaming column 301 is pushed toward the pipe fitting to perform the reaming operation. The lubricant sprayed by the nozzle 3011 can accurately fall on the area where the inner wall of the pipe fitting and the arc column 3013 are initially in contact. This position covers both the surface of the arc column 3013 and the part of the reaming column 301 that is about to be in close contact with the pipe fitting. Through such a layout, in the subsequent reaming process, the contact surface between the pipe fitting and the reaming column 301 can be continuously covered with lubricating liquid, thereby effectively reducing the friction resistance between the two, promoting the smooth progress of the reaming operation and protecting the tool and the workpiece from unnecessary wear.

[0029] A support body 103 is fixed on the workbench 1, and a positioning block 104 is slidably installed on the support body 103. The positioning block 104 is arranged at the end of the horizontal plate 203. An oil cylinder for driving the positioning block 104 to slide is fixed on the support body 103. When the pipe fitting is placed on the horizontal plate 203, the positioning plate can position the end of the pipe fitting to achieve a positioning effect.

[0030] Embodiment 2 like Figure 1-Figure 8 As shown, based on the first embodiment, this embodiment provides an oil supply system for the arc column 3013, which is as follows: The workbench 1 is provided with an oil supply chamber 101 inside, and an oil supply pipe 303 is installed on the slider 302. One end of the oil supply pipe 303 is connected to the nozzle 3011, and the other end is connected to the oil supply chamber 101. The oil supply pipe 303 extends to the bottom of the oil supply chamber 101 to ensure that most of the lubricating liquid in the oil supply chamber 101 can be effectively extracted, thereby achieving more efficient use of the lubricating liquid. The slider 302 is fixed with an oil pump that provides oil extraction power to the oil supply pipe 303. The oil pump has the ability to extract lubricating liquid from the oil supply chamber 101, and the extracted lubricating liquid is then injected into the nozzle 3011 system. The nozzle 3011 is responsible for spraying the lubricating liquid evenly on the inner wall of the pipe fitting, and at the same time ensures that the lubricating liquid released by the liquid outlet head 3012 can smoothly cover and lubricate the inner wall of the pipe fitting, thereby achieving a comprehensive lubrication effect.

[0031] A liquid outlet head 3012 is provided at the end of the arc column 3013. The diameter of the liquid outlet head 3012 is smaller than the diameter of the pipe fitting, ensuring that the pipe fitting can freely contact the arc column 3013, and at the same time ensuring that the lubricating liquid released by the liquid outlet head 3012 can smoothly cover and lubricate the inner wall of the pipe fitting and the arc column 3013. The liquid outlet head 3012 is provided with an annular curved surface, and a plurality of mounting holes corresponding to the nozzle 3011 are provided on the annular curved surface. The nozzle 3011 is installed in the corresponding mounting hole. The nozzle 3011 is connected to the mounting hole through a spherical surface, which can ensure that it can rotate at any angle inside the mounting hole. The spherical connection of the nozzle 3011 can ensure that it can rotate at any angle inside the mounting hole, and there is friction between the nozzle 3011 and the mounting hole. The nozzle 3011 can stay at any position, and only needs to adjust its angle before use.

[0032] A connecting tube 3014 is fixed to the tail of the nozzle 3011, and a clearance groove is provided inside the liquid outlet head 3012 for the connecting tube 3014 to move, so as to ensure that the connecting tube 3014 can rotate with the liquid outlet head 3012, and the connecting tube 3014 is connected to the oil supply pipe 303 through a hose 3015, and the hose 3015 passes through the clearance groove. This design fully considers the bending of the hose 3015 during use. The existence of the clearance groove ensures that the hose 3015 will not be hindered when bending.

[0033] Embodiment 3 like Figure 1-Figure 8 As shown, based on the first and second embodiments, this embodiment provides a structure of a clamping mechanism 2, which is specifically as follows: The clamping mechanism 2 includes a first clamping plate 201 and a second clamping plate 202. The first clamping plate 201 is fixed on the workbench 1, and the second clamping plate 202 is slidably installed on the workbench 1. A cylinder for driving the second clamping plate 202 to slide is also fixed on the workbench 1. A clamping hole for clamping the pipe fitting is provided at the connecting position of the first clamping plate 201 and the second clamping plate 202. A cross plate 203 is fixed on the first clamping plate 201, and a groove is provided on the cross plate 203. When the first clamping plate 201 and the second clamping plate 202 clamp one end of the pipe fitting, due to the long length of the pipe fitting, the remaining part needs to be placed in the groove to support the pipe fitting. There are three hole-expanding columns 301, and the axes of the three hole-expanding columns 301 are on the same horizontal plane. The first clamping plate 201 and the second clamping plate 202 are both provided with clearance holes adapted to the hole-expanding columns 301. When one of the hole-expanding columns 301 is clamped by the first clamping plate 201 and the second clamping plate 202, the remaining hole-expanding columns 301 will extend into the clearance hole, or extend to the outer space of the first clamping plate 201 or the second clamping plate 202.

[0034] Working principle: During the installation process, first ensure that the first clamping plate 201 and the second clamping plate 202 of the clamping mechanism 2 are in a separated state, and then place the pipe in the preset groove on the horizontal plate 203. Next, use the positioning block 104 to accurately position the end of the pipe to ensure that it is stable and centered. After the positioning is completed, the first clamping plate 201 and the second clamping plate 202 are clamped toward the middle until the pipe is firmly clamped between the two.

[0035] Next, adjust the reaming column 301 with the smallest diameter to the center of the pipe. Then, start the driving mechanism 4, which will drive the slider 302 and the reaming column 301 to slide smoothly along the axis of the pipe. When the reaming column 301 slides to the pipe mouth of the pipe, the oil pump starts immediately, draws lubricating fluid from the oil supply chamber 101, and accurately sprays it on the inner wall of the pipe and the contact surface of the reaming column 301 through the nozzle 3011. This step realizes effective lubrication before the reaming operation begins, providing good conditions for subsequent operations.

[0036] As the reaming column 301 continues to penetrate deeper, it begins to expand the pipe, and the nozzle 3011 continues to spray lubricating fluid to ensure that the contact interface between the pipe and the reaming column 301 always remains lubricated during the reaming process, thereby effectively reducing friction resistance, protecting the workpiece and tools from wear, and promoting the smooth progress of the reaming operation.

[0037] When the reaming column 301 with the smallest diameter completes its reaming task, it needs to be replaced with a reaming column 301 with a larger diameter, and the above reaming and lubrication steps are repeated until all the preset reaming columns 301 complete the reaming work. At this point, the overall reaming operation of the pipe is completed.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A pipe expansion device, comprising a workbench (1), characterized in that: The workbench (1) is equipped with: A clamping mechanism (2), wherein the clamping mechanism (2) is capable of fixing the pipe fitting on the workbench (1); A hole expanding mechanism (3), the hole expanding mechanism (3) comprising a movable slider (302), a plurality of hole expanding columns (301) being mounted on the slider (302), the diameters of the plurality of hole expanding columns (301) being arranged in ascending order of size, and during the movement of the slider (302), the plurality of hole expanding columns (301) can be aligned in sequence and act on the pipe fixed by the clamping mechanism (2); A driving mechanism (4), wherein the slider (302) is slidably mounted on the driving mechanism (4); The end of the hole-expanding column (301) is provided with an arc column (3013), and the end of the arc column (3013) is provided with a nozzle (3011) capable of spraying lubricating liquid, and there are a plurality of nozzles (3011) and the plurality of nozzles (3011) are circumferentially arranged on the hole-expanding column (301), and the spraying direction of the nozzles (3011) is toward the surface of the arc column (3013).

2. A pipe expansion device according to claim 1, characterized in that: An oil supply chamber (101) is provided inside the workbench (1), an oil supply pipe (303) is installed on the slider (302), one end of the oil supply pipe (303) is connected to the nozzle (3011), and the other end is connected to the oil supply chamber (101), and an oil pump for providing oil pumping power to the oil supply pipe (303) is fixed on the slider (302).

3. A pipe expansion device according to claim 2, characterized in that: A liquid outlet head (3012) is provided at the end of the arc column (3013); the diameter of the liquid outlet head (3012) is smaller than the diameter of the pipe fitting; an annular curved surface is provided on the liquid outlet head (3012); a plurality of mounting holes corresponding one to one with the nozzles (3011) are provided on the annular curved surface; the nozzles (3011) are mounted in the corresponding mounting holes; and the nozzles (3011) are connected in the mounting holes via a spherical surface.

4. A pipe expansion device according to claim 3, characterized in that: A connecting tube (3014) is fixed to the tail of the nozzle (3011), a clearance groove for the connecting tube (3014) to move is provided inside the liquid outlet head (3012), and the connecting tube (3014) is connected to the oil supply pipe (303) via a hose (3015).

5. A pipe expansion device according to claim 1, characterized in that: The clamping mechanism (2) comprises: A first clamping plate (201) and a second clamping plate (202), wherein the first clamping plate (201) is fixed on the workbench (1), and the second clamping plate (202) is slidably mounted on the workbench (1), a clamping hole for clamping a pipe fitting is provided at a connection position between the first clamping plate (201) and the second clamping plate (202), and a transverse plate (203) is fixed on the first clamping plate (201), and a groove is provided on the transverse plate (203).

6. A pipe expansion device according to claim 5, characterized in that: The number of the hole-expanding columns (301) is three, and the axes of the three hole-expanding columns (301) are on the same horizontal plane. The first clamping plate (201) and the second clamping plate (202) are both provided with clearance holes adapted to the hole-expanding columns (301).

7. A pipe expansion device according to claim 1, characterized in that: The driving mechanism (4) comprises a support plate (401), the slider (302) is slidably mounted on the support plate (401), a first screw rod (102) is rotatably mounted inside the workbench (1), and a screw hole meshing with the first screw rod (102) is provided on the support plate (401).

8. A pipe expansion device according to claim 7, characterized in that: A second screw rod (402) is rotatably mounted inside the support plate (401), and a screw hole meshing with the second screw rod (402) is provided on the slider (302).

9. A pipe expansion device according to claim 6, characterized in that: A support body (103) is fixed on the workbench (1), a positioning block (104) is slidably mounted on the support body (103), and the positioning block (104) is arranged at the end of the transverse plate (203).

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