A small-bore PVC pipe flaring device

Abstract

The application belongs to the field of pipe expanding device, and particularly relates to a small-caliber PVC pipe expanding device, which comprises a processing frame, two air cylinders fixedly connected to the inner wall of the processing frame, and an expanding die fixedly connected to the output end of each air cylinder. The polishing ball on the rotating sleeve can be close to the inner wall of the PVC pipe under the action of centrifugal force after the expanding die expands, so that the PVC pipe is opened and the PVC pipe after expansion is corrected. The polishing balls of the polishing assemblies can not only open and correct the PVC pipe after expansion, but also polish the inner wall of the PVC pipe through the rotating polishing balls. When the polishing ball is close to the inner wall of the PVC pipe, the grinding liquid in the suction cavity can be pumped out through the piston and delivered to the polishing ball, so that the polishing ball can polish the inner wall of the PVC pipe more smoothly, and manual polishing is not needed, which is convenient to operate.

Description

Technical Field

[0001] This invention belongs to the field of pipe flaring devices, and in particular relates to a flaring device for small-diameter PVC pipes. Background Technology

[0002] PVC is a material with polyvinyl chloride as its main component and other components added to enhance its heat resistance, toughness and ductility. It is one of the most widely used synthetic materials in the world today.

[0003] A search revealed that patent document CN112338076A discloses a flaring unit for an automatic flaring machine for straight pipe fittings. This unit can quickly select the appropriate flaring unit body according to different sizes of straight pipe fittings, thus making it applicable to the flaring of pipe fittings of different sizes.

[0004] However, the above-mentioned flaring devices often have the following problems when flaring small-diameter PVC pipes:

[0005] 1. Because small-diameter PVC pipes have a thinner diameter, they are prone to bending during the flaring process. The aforementioned device cannot correct the flared PVC pipe, resulting in poor quality of the processed PVC pipe.

[0006] 2. During the flaring process of PVC pipes, a flaring mold is needed to open them up. During this process, many burrs will be generated on the inner wall of the PVC pipe. Workers need to polish the inside smooth after the flaring is completed, which is very inconvenient. Summary of the Invention

[0007] The purpose of this invention is to address the problems mentioned in the background art by providing a small-diameter PVC pipe flaring device that, after the flaring mold has finished flaring, drives the grinding ball to rotate, and uses centrifugal force to make the grinding ball fit against the inner wall of the PVC pipe, thereby grinding the inner wall of the PVC pipe.

[0008] To achieve the above objectives, the present invention adopts the following technical solutions:

[0009] A small-diameter PVC pipe flaring device, comprising:

[0010] A processing frame, wherein two cylinders are fixedly connected to the inner wall of the processing frame, and a flaring mold is fixedly connected to the output end of the two cylinders;

[0011] A rotating assembly includes a threaded rod, a C-shaped plate, a one-way bearing, a rotating rod, a spline, and a rotating sleeve. The threaded rod is rotatably connected to the inner wall of the processing frame. The C-shaped plate is fixedly connected to the side of the flaring mold near the inner wall of the processing frame. The threaded rod penetrates the C-shaped plate, and the inner wall through which the C-shaped plate is penetrated is provided with threads that engage with the threaded rod. The rotating rod is mounted on the side of the threaded rod away from the inner wall of the processing frame via a one-way bearing, and a rotating sleeve is connected to the rotating rod via a spline.

[0012] A plurality of grinding components, each of the grinding components including a fixed plate, a slide groove, a push plate, a first spring, a grinding ball, a suction chamber, a piston, a drain channel, a draw channel, and a storage chamber. A fixed plate is fixedly connected to the outer wall of the rotating sleeve. A slide groove is formed on the side wall of the fixed plate away from the rotating sleeve. A push plate is slidably connected in the slide groove. The push plate is elastically connected to the inner wall of the slide groove by the first spring. A grinding ball is fixedly connected to the end of the push plate away from the slide groove. A suction chamber is formed inside the push plate. A piston is slidably connected in the suction chamber. A drain channel and a draw channel are connected to the side of the suction chamber near the slide groove. A storage chamber is fixedly connected to the outer wall of the push plate. The draw channel is connected to the storage chamber.

[0013] Preferably, each of the drainage channels extends to the outside of the push plate and is directly opposite each grinding ball via a drainage pipe.

[0014] Preferably, each of the drainage channels is provided with a first one-way valve, and the flow direction of each first one-way valve is from the suction chamber to the drainage channel.

[0015] Preferably, each of the liquid extraction channels is provided with a second one-way valve, and the flow direction of each second one-way valve is from the liquid storage chamber to the liquid extraction channel.

[0016] Preferably, a water pump is provided above the processing frame, and the outlet of the water pump extends into the processing frame through a drain pipe.

[0017] Preferably, a plurality of clamping rollers are elastically connected to the inner wall of the processing frame by a plurality of second springs.

[0018] Preferably, when the flaring mold moves to the side outside the processing frame, the rotation of the threaded rod cannot drive the rotating rod to rotate through the one-way bearing.

[0019] Preferably, two connecting rods are fixedly connected to the side of the flaring mold near the rotating sleeve, and a circular limiting groove is provided on the rotating sleeve. Both connecting rods are slidably connected to the inner wall of the circular limiting groove.

[0020] Preferably, a fixing rod is fixedly connected to the inner wall of the chute, and the fixing rod extends into the interior of the suction chamber and is fixedly connected to the piston.

[0021] Compared with existing technologies, the advantages of this small-diameter PVC pipe flaring device are:

[0022] 1. By setting up a rotating component, after the flaring mold is completed, the rotation of the threaded rod can drive the rotating rod to rotate, which in turn drives the rotating sleeve to rotate through the spline. This allows the grinding ball on the rotating sleeve to come close to the inner wall of the PVC pipe under the action of centrifugal force, thus expanding the PVC pipe and correcting the flared PVC pipe, thereby improving the product quality of the processed PVC pipe.

[0023] 2. This invention, by setting up several grinding components, allows the grinding balls to adhere to the inner wall of the PVC pipe under centrifugal force after the flaring is completed. This not only expands and corrects the PVC pipe, but also grinds the inner wall of the PVC pipe through the rotating grinding balls. While the grinding balls are close to the inner wall of the PVC pipe, the grinding liquid in the suction chamber can be extracted by the piston and transported to the grinding balls, so that the grinding balls can grind the inner wall of the PVC pipe more smoothly. No manual grinding is required, making the operation convenient.

[0024] 3. This invention uses a water pump and clamping rollers. The water pump cools the PVC pipe after flaring, and the clamping rollers clamp and fix the PVC pipe to prevent horizontal displacement during the flaring process. At the same time, when the PVC pipe needs to be rotated for flaring, the clamping rollers do not obstruct the rotation of the PVC pipe. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the processing frame inside a small-diameter PVC pipe flaring device provided by the present invention;

[0026] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0027] Figure 3 This is a schematic diagram of the planar structure of a small-diameter PVC pipe flaring device provided by the present invention;

[0028] Figure 4 yes Figure 3 Enlarged view of point B in the middle;

[0029] Figure 5 yes Figure 4 Enlarged view of point C in the middle.

[0030] In the diagram, 1. Machining frame; 11. Cylinder; 12. Flaring mold; 13. Water pump; 131. Drain pipe; 14. Clamping roller; 141. Second spring; 2. Rotating assembly; 21. Threaded rod; 22. C-shaped plate; 23. One-way bearing; 24. Rotating rod; 25. Spline; 26. Rotating sleeve; 27. Connecting rod; 28. Circular limiting groove; 3. Grinding assembly; 31. Fixing plate; 32. Slide groove; 33. Push plate; 34. First spring; 35. Grinding ball; 36. Suction chamber; 37. Piston; 371. Fixing rod; 38. Drainage channel; 39. Suction channel; 310. Storage chamber; 311. First one-way valve; 312. Second one-way valve. Detailed Implementation

[0031] The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0032] like Figure 1-5 As shown, a small-diameter PVC pipe flaring device includes:

[0033] Processing frame 1, two cylinders 11 are fixedly connected to the inner wall of processing frame 1, and flaring molds 12 are fixedly connected to the output ends of the two cylinders 11;

[0034] Rotating assembly 2 includes a threaded rod 21, a C-shaped plate 22, a one-way bearing 23, a rotating rod 24, a spline 25, and a rotating sleeve 26. The threaded rod 21 is rotatably connected to the inner wall of the processing frame 1. The C-shaped plate 22 is fixedly connected to the side of the flaring mold 12 near the inner wall of the processing frame 1. The C-shaped plate 22 is penetrated by the threaded rod 21, and its inner wall through which it is penetrated is provided with threads that are threaded to the threaded rod 21. The rotating rod 24 is installed on the side of the threaded rod 21 away from the inner wall of the processing frame 1 through the one-way bearing 23. The rotating sleeve 26 is connected to the rotating rod 24 through the spline 25.

[0035] Two connecting rods 27 are fixedly connected to the side of the flaring mold 12 near the rotating sleeve 26. The rotating sleeve 26 has a circular limiting groove 28. Both connecting rods 27 are slidably connected to the inner wall of the circular limiting groove 28. This allows the flaring mold 12 to move synchronously with the rotating sleeve 26 by pulling it through the connecting rods 27. However, since the connecting rods 27 can move in a circular motion within the circular limiting groove 28, the rotating sleeve 26 can move during the pulling process.

[0036] When the flaring mold 12 moves to the side outside the processing frame 1, the rotation of the threaded rod 21 cannot drive the rotating rod 24 to rotate through the one-way bearing 23. When the flaring mold 12 moves to the side inside the processing frame 1, the rotation of the threaded rod 21 can drive the rotating rod 24 to rotate through the one-way bearing 23.

[0037] Several grinding components 3 are provided. Each grinding component 3 includes a fixed plate 31, a sliding groove 32, a push plate 33, a first spring 34, a grinding ball 35, a suction chamber 36, a piston 37, a drain channel 38, a suction channel 39, and a storage chamber 310. The fixed plate 31 is fixedly connected to the outer wall of the rotating sleeve 26. A sliding groove 32 is provided on the side wall of the fixed plate 31 away from the rotating sleeve 26. The push plate 33 is slidably connected in the sliding groove 32. The push plate 33 is elastically connected to the inner wall of the sliding groove 32 through the first spring 34. A grinding ball 35 is fixedly connected to the end of the push plate 33 away from the sliding groove 32. A suction chamber 36 is provided inside the push plate 33. The piston 37 is slidably connected in the suction chamber 36. The side of the suction chamber 36 near the sliding groove 32 is connected to the drain channel 38 and the suction channel 39. The storage chamber 310 is fixedly connected to the outer wall of the push plate 33. The suction channel 39 is connected to the storage chamber 310.

[0038] Each drainage channel 38 extends to the outside of the push plate 33 and is directly opposite each grinding ball 35 via a drainage pipe. Each drainage channel 38 is equipped with a first one-way valve 311, and the flow direction of each first one-way valve 311 is from the suction chamber 36 to the drainage channel 38. Each suction channel 39 is equipped with a second one-way valve 312, and the flow direction of each second one-way valve 312 is from the storage chamber 310 to the suction channel 39.

[0039] It is worth mentioning that when the rotating sleeve 26 rotates, it can drive the fixed plate 31 to rotate, causing the push plate 33 and the grinding balls 35 on the push plate 33 to move away from the slide groove 32 under the action of centrifugal force and close to the inner wall of the PVC pipe. At the same time, since the suction chamber 36 in the push plate 33 moves with the push plate 33, and since the inner wall of the slide groove 32 is fixedly connected to the fixed rod 371, which extends into the interior of the suction chamber 36 and is fixedly connected to the piston 37, the position of the piston 37 remains unchanged, causing the piston 37 to move within the suction chamber 36, thus... The grinding fluid in the suction chamber 36 is discharged onto the grinding ball 35 through the drain channel 38 and the drain pipe. The first one-way valve 311 ensures that the grinding fluid can only be discharged through the drain channel 38. When the rotating sleeve 26 stops rotating, the push plate 33 and the grinding ball 35 return to their initial positions under the elastic force of the first spring 34. At this time, the piston 37 returns to its initial position in the suction chamber 36 and draws out the grinding fluid in the storage chamber 310 through the suction channel 39. The second one-way valve 312 ensures that the grinding fluid in the storage chamber 310 can only be drawn out during suction.

[0040] A water pump 13 is provided above the processing frame 1. The water outlet of the water pump 13 extends into the processing frame 1 through a drain pipe 131. Several clamping rollers 14 are elastically connected to the inner wall of the processing frame 1 by several second springs 141. The water pump 13 can cool the PVC pipe after it has been flared. The clamping rollers 14 can clamp and fix the PVC pipe so that it will not be horizontally displaced during the flaring process. At the same time, when it is necessary to rotate the PVC pipe for flaring, the clamping rollers 14 will not obstruct the rotation of the PVC pipe.

[0041] The functional principle of this invention can be explained through the following operational methods:

[0042] S1: When flaring a small-diameter PVC pipe, manually open several clamping rollers 14 to transport the PVC pipe into the processing frame 1. Then release the clamping rollers 14 so that the clamping rollers 14 are pressed tightly against the outer wall of the PVC pipe by the elastic force of the second spring 141, so that the PVC pipe cannot move horizontally but can rotate. During the processing, the other end of the PVC pipe can be fixed by the motor so that the PVC pipe can rotate during processing, making it easier for the flaring mold 12 to flare the PVC pipe.

[0043] S2: During the flaring process, two cylinders 11 are activated to push the flaring mold 12 closer to the PVC pipe and further push the flaring mold 12 into the PVC pipe to perform the flaring operation. During this process, the flaring mold 12 drives the C-shaped plate 22 to move, which in turn allows the threaded rod 21 to rotate. However, the one-way bearing 23 prevents the rotating rod 24 from rotating, thus preventing the rotating rod 24 from driving the rotating sleeve 26 to rotate. This further prevents the grinding ball 35 on the rotating sleeve 26 from moving away from the rotating sleeve 26 under the action of centrifugal force and getting stuck at the PVC pipe opening. The movement of the flaring mold 12 will drive the rotating sleeve 26 to move horizontally through the two connecting rods 27, so that the fixing plate 31 and the grinding ball 35 on the rotating sleeve 26 can enter the PVC pipe.

[0044] S3: After the flaring is completed, the two cylinders 11 are opened again, so that the flaring mold 12 is pulled out from the PVC pipe. At this time, the C-shaped plate 22 will drive the threaded rod 21 to rotate in the opposite direction. Through the one-way bearing 23, the rotating rod 24 can be driven to rotate. The rotating rod 24 drives the rotating sleeve 26 to rotate through the spline 25. At the same time, due to the circular limiting groove 28, the rotating sleeve 26 can be pulled out of the PVC pipe by the flaring mold 12. However, the rotating sleeve 26 can rotate at the same time. The grinding ball 35 on the rotating sleeve 26 can be close to the inner wall of the PVC pipe under the action of centrifugal force, which can open up the PVC pipe and correct the PVC pipe after the flaring is completed, thus improving the product quality of the processed PVC pipe.

[0045] S4: While the rotating sleeve 26 rotates, it drives the fixed plate 31 to rotate, causing the grinding ball 35 to move away from the slide groove 32 under the action of centrifugal force and get close to the inner wall of the PVC pipe. This not only opens and corrects the PVC pipe, but also grinds the inner wall of the PVC pipe through the rotating grinding ball 35. While the grinding ball 35 is close to the inner wall of the PVC pipe, the piston 37 can extract the grinding liquid in the suction chamber 36 and transport it to the grinding ball 35, so that the grinding ball 35 can grind the inner wall of the PVC pipe more smoothly. No manual grinding is required, and the operation is convenient.

[0046] S5: When the flaring mold 12 returns to its initial position, the two cylinders 11 are closed, so that the flaring mold 12 and the C-shaped plate 22 no longer move. At this time, the threaded rod 21 no longer rotates, and the rotating rod 24 and the rotating sleeve 26 no longer rotate. Under the elastic force of the first spring 34, the push plate 33 and the grinding ball 35 return to their initial positions. At this time, the piston 37 returns to its initial position in the suction chamber 36 and draws out the grinding liquid in the storage chamber 310 through the liquid suction channel 39, which is convenient for the next flaring and grinding operation. Then, the water pump 13 is turned on, and the water is discharged to the PVC pipe through the drain pipe 131 to cool the PVC pipe.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A flaring device for small-diameter PVC pipes, characterized in that, include: Processing frame (1), two cylinders (11) are fixedly connected to the inner wall of the processing frame (1), and a flaring mold (12) is fixedly connected to the output end of the two cylinders (11). Rotating assembly (2), the rotating assembly (2) includes a threaded rod (21), a C-shaped plate (22), a one-way bearing (23), a rotating rod (24), a spline (25) and a rotating sleeve (26). The threaded rod (21) is rotatably connected to the inner wall of the processing frame (1). The C-shaped plate (22) is fixedly connected to the side of the flaring mold (12) near the inner wall of the processing frame (1). The C-shaped plate (22) is penetrated by the threaded rod (21), and its inner wall through which it is penetrated is provided with a thread that engages with the threaded rod (21). The rotating rod (24) is installed on the side of the threaded rod (21) away from the inner wall of the processing frame (1) through the one-way bearing (23). The rotating sleeve (26) is connected to the rotating rod (24) through the spline (25). Several grinding components (3), each of the grinding components (3) includes a fixed plate (31), a slide groove (32), a push plate (33), a first spring (34), a grinding ball (35), a suction chamber (36), a piston (37), a discharge channel (38), a suction channel (39), and a storage chamber (310). A fixed plate (31) is fixedly connected to the outer wall of the rotating sleeve (26). A slide groove (32) is provided on the side wall of the fixed plate (31) away from the rotating sleeve (26). A push plate (33) is slidably connected in the slide groove (32). The push plate (33) is elastically connected to the inner wall of the slide groove (32) via the first spring (34). A grinding ball (35) is fixedly connected to the end of the push plate (33) away from the slide groove (32). A suction chamber (36) is opened inside the push plate (33). A piston (37) is slidably connected inside the suction chamber (36). A drain channel (38) and a suction channel (39) are connected to the side of the suction chamber (36) near the slide groove (32). A storage chamber (310) is fixedly connected to the outer wall of the push plate (33). The suction channel (39) is connected to the storage chamber (310). When the flaring mold (12) moves to the side outside the processing frame (1), the rotation of the threaded rod (21) cannot drive the rotating rod (24) to rotate through the one-way bearing (23); Two connecting rods (27) are fixedly connected to the side of the flaring mold (12) near the rotating sleeve (26). A circular limiting groove (28) is provided on the rotating sleeve (26), and the two connecting rods (27) are slidably connected to the inner wall of the circular limiting groove (28).

2. The small-diameter PVC pipe flaring device according to claim 1, characterized in that, Each of the drainage channels (38) extends to the outside of the push plate (33) and is directly opposite each grinding ball (35) via a drainage pipe.

3. The small-diameter PVC pipe flaring device according to claim 1, characterized in that, Each of the drainage channels (38) is provided with a first check valve (311), and the flow direction of each first check valve (311) is from the suction chamber (36) to the drainage channel (38).

4. The small-diameter PVC pipe flaring device according to claim 1, characterized in that, Each of the described liquid extraction channels (39) is provided with a second one-way valve (312), and the flow direction of each second one-way valve (312) is from the liquid storage chamber (310) to the liquid extraction channel (39).

5. The small-diameter PVC pipe flaring device according to claim 1, characterized in that, A water pump (13) is provided above the processing frame (1), and the water outlet 1 of the water pump (13) extends into the processing frame (1) through a drain pipe (131).

6. The small-diameter PVC pipe flaring device according to claim 1, characterized in that, The inner wall of the processing frame (1) is elastically connected to several clamping rollers (14) by several second springs (141).

7. The small-diameter PVC pipe flaring device according to claim 1, characterized in that, A fixing rod (371) is fixedly connected to the inner wall of the slide (32), and the fixing rod (371) extends into the interior of the suction chamber (36) and is fixedly connected to the piston (37).

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