Integrated expanding device for plastic pipe fittings

Abstract

The present invention discloses an integrated expanding device for plastic pipe fittings, which mainly relates to the technical field of pipe processing quality. It comprises a frame, on which a clamping mechanism, a heating mechanism and an expanding mechanism are installed; the heating mechanism comprises a liftable heating sleeve, and the heating sleeve forms an arc structure with an arc of 220-280 degrees; the expanding mechanism comprises a fixed seat, and a travel seat is provided on the side of the fixed seat away from the heating sleeve, and the travel seat has a fixed stroke Df and an adjustment stroke Dx in one expanding operation, a core piece is fixed on the travel seat, and a positioning sleeve is fixed on the fixed seat, and a circular port adapted to the core piece is provided on the end face of the positioning sleeve close to the heating sleeve, and a distance sensor is installed on the edge of the port, and the Df is a straight line stroke corresponding to the predetermined expanding depth, and the Dx corresponds to the retraction distance data obtained by the distance sensor. The beneficial effects of the present invention are: it realizes the merging and simplification of process steps, corrects the problem of expanding depth, and improves production efficiency and quality.

Description

Technical Field

[0001] The invention relates to the technical field of pipe processing quality, in particular to an integrated expanding device for plastic pipe fittings. Background Art

[0002] To facilitate the installation and docking of plastic pipes, one or both ends of the pipe must be flared according to the installation requirements. The basic process involves heating the flared end and then expanding it through a core extrusion process. For larger diameter pipes, this extrusion process creates significant impact forces at the end, significantly affecting the pipe material at and near the flared end. This can cause bending at the end fitting and shortening of the flared portion. This not only directly impacts the quality of the pipe fitting, but also results in inconsistent groove depth and poor processing accuracy. Summary of the Invention

[0003] The object of the present invention is to provide an integrated expanding device for plastic pipe fittings, which realizes the co-location merging and simplification of working procedures, corrects the problem of expanding depth, and improves production efficiency and quality.

[0004] To achieve the above-mentioned purpose, the present invention is implemented through the following technical solutions:

[0005] An integrated expanding device for plastic pipes comprises a frame, with a clamping mechanism, a heating mechanism and an expanding mechanism installed along the length direction of the frame at one end thereof;

[0006] The heating mechanism includes a heating sleeve, which is installed on the frame in a liftable manner. A notch is provided in the center of the bottom of the heating sleeve, so that the heating sleeve forms an arc structure with an arc of 220-280 degrees. When the heating sleeve is at the bottom of its stroke, it is coaxial with the plastic pipe; the expanding mechanism includes a fixed seat, and a travel seat with a travel in the same direction as the length direction of the pipe is provided on the side of the fixed seat away from the heating sleeve. The travel seat has a fixed stroke Df and an adjustment stroke Dx in one expanding operation. A core piece is fixed on the travel seat, and a positioning sleeve is fixed on the fixed seat. A circular opening adapted to the core piece is provided on the end face of the positioning sleeve close to the heating sleeve, and the opening is located below the heating sleeve. A distance sensor is installed on the edge of the opening. The Df is a linear stroke corresponding to the predetermined expanding depth, and the Dx corresponds to the retraction distance data obtained by the distance sensor.

[0007] The front end of the core piece close to the heating sleeve is provided with a groove surface, the front end of the groove surface is provided with a guide section, and the front end of the guide section is installed with a diameter measuring sensor.

[0008] A device box is provided on the frame, and the device box is located below the pipe. A lifting seat with an electrically controlled lifting stroke is installed in the device box, and a micrometer is installed on the lifting seat. When the lifting seat is at the top of its stroke, the probe of the micrometer contacts the pipe wall on the bottom surface of the pipe. The micrometer is arranged close to the clamping mechanism.

[0009] The fixed seat is provided with a horizontally extending sliding rod, and the sliding rod is arranged on the side of the fixed seat away from the clamping mechanism. The travel seat is provided with a sleeve that slides with the sliding rod, and the sleeve is sleeved on the outside of the sliding rod. The sliding rod and sliding sleeve matrix is ​​distributed into 4 groups and is arranged around the core piece.

[0010] A fixing frame is provided on the top side of the fixing seat, and the fixing frame is used to fix the water spraying pipes, and there are multiple water spraying pipes.

[0011] The clamping mechanism includes an upper clamp and a lower clamp with a relative approach or separation stroke. The bottom side of the upper clamp is provided with an upper clamping groove that is nearly semicircular, and the top side of the lower clamp is provided with a lower clamping groove that is nearly semicircular.

[0012] The frame includes an upper frame and a lower frame that are fixedly installed, and the upper frame and the lower frame are correspondingly arranged up and down;

[0013] At least two groups of swivel roller groups are installed on the lower frame, and the swivel roller groups include two supporting rollers arranged in parallel, and the two supporting rollers are symmetrically arranged in the same direction relative to the pipe. The supporting rollers are rotatably installed on the lower frame through bearing seats, wherein at least one group of swivel roller groups is provided with two pressing rollers above, and the pressing rollers are rotatably installed on the first wheel frame, and the first wheel frame is liftably installed on the upper frame, and when the first wheel frame is at the bottom of its stroke, the surface of the pressing roller is in close contact with the pipe;

[0014] A lower push wheel is rotatably mounted on the lower frame, and the lower push wheel is centrally mounted below the pipe. An upper push wheel is provided above the lower push wheel, and the upper push wheel is rotatably mounted on the second wheel frame, and the second wheel frame is liftably mounted on the upper frame. When the second wheel frame is at the bottom of its stroke, the surface of the upper push wheel is in close contact with the pipe, and a V-shaped groove is provided in the middle of the upper push wheel and the lower push wheel.

[0015] A position sensor is installed below the positioning sleeve, and the position sensor is used to provide feedback data to the lower push wheel and / or the upper push wheel.

[0016] The pressure wheel is penetrated by a second rotating shaft connected to the pressure wheel for rotation. The first wheel frame is provided with a waist-shaped hole extending horizontally at a position corresponding to the second rotating shaft. Both ends of the second rotating shaft pass through the waist-shaped hole and are fixed by nuts.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] This equipment offers significant advantages in improving product quality, simplifying operations, and increasing production efficiency. First, by combining the heating and flaring processes, the process is simplified and processing time is shortened. Furthermore, with the heating jacket positioned above the flaring station, precise control of the tube head temperature is ensured during the flaring process. Second, high-precision correction of tube end setbacks during the flaring operation is achieved, enabling precise control of flaring depth. This significantly improves the quality and control of the flaring process, achieving process improvement. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the present invention in the expansion stage when in use.

[0020] Figure 2 This invention Figure 1 side view.

[0021] Figure 3 It is a top view of the present invention.

[0022] Figure 4 It is a structural schematic diagram of the present invention.

[0023] Figure 5 It is a partial structural diagram of the present invention (heating mechanism and expanding mechanism).

[0024] Figure 6 It is a schematic diagram of the partial structure of the present invention (clamping mechanism, heating mechanism and expanding mechanism).

[0025] Reference numerals shown in the accompanying drawings:

[0026] 1. Lower frame; 2. Upper frame; 3. Rotary roller assembly; 4. First bearing seat; 5. First pulley; 6. Pressure roller; 7. First wheel frame; 8. Waist-shaped hole; 9. First polished rod; 10. First cylinder body; 11. First cylinder rod; 12. Second bearing seat; 13. Lower push wheel; 14. V-groove; 15. Second pulley; 16. Upper push wheel; 17. Second wheel frame; 18. Second polished rod; 19. Second cylinder body; 20. Second cylinder rod; 21. Lifting guide rail; 22. Upper fixture; 23. Lower fixture; 2 4. Third cylinder body; 25. Third cylinder rod; 26. Fourth cylinder body; 27. Fourth cylinder rod; 28. Heating sleeve; 29. ​​Third polished rod; 30. Lead screw; 31. Heating rod; 32. Fixing seat; 33. Fixing bracket; 34. Sliding rod; 35. Travel seat; 36. Sleeve; 37. Cylinder; 38. Push rod; 39. Core piece; 40. Groove surface; 41. Guide section; 42. Diameter sensor; 43. Positioning sleeve; 44. Passing; 45. Distance sensor; 46. Micrometer; 47. Equipment box. DETAILED DESCRIPTION

[0027] Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiments are only used to illustrate the present invention and are not used in limiting the scope of the present invention.In addition, should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the application equally.

[0028] Example:

[0029] There are many factors that affect processing quality during processing. After statistics on product quality and tracing back to the previous process, the main points are summarized as follows:

[0030] Now most of the heating and expanding are scattered in different stations. The heated pipes need to be moved or grabbed to the expanding station before they can be expanded. In this process, since multiple stations need to be moved and repositioned, the interval time is long, and the pipe head is exposed to the workshop air for a certain amount of cooling. Although the temperature can be increased according to empirical data during heating to make up for the temperature difference of cooling, the key is that the temperature in the workshop varies greatly in different climatic seasons, so the heat lost during the exposure interval is not the same, and frequent adjustments are required. Each adjustment will have a certain impact on product quality.

[0031] During impact expansion, the tube head experiences significant recoil. This is due to a variety of factors, including bending from the clamping point to the tube head during impact, shrinkage during heated expansion, material differences between batches of tubes, and the effects of the processing steps on tube shaping and hardness. These factors contribute to significant recoil after punching. Since the stroke is fixed, this causes fluctuations in the expansion depth. While manufacturers may add a slight amount of stroke to compensate for this shrinkage, the significant fluctuation in shrinkage results in large errors in expansion depth.

[0032] Since a certain length of pipe near one end of the flared pipe mouth will be heated to a certain temperature, the pipe adjacent to the flared part is more likely to change during the flaring impact, such as bending, shortening, etc. More importantly, due to compression, the inner wall is deformed, and its inner diameter and inner wall roundness will change. Changes in the data inside the pipe near the interface (flared) position will have a greater impact on the quality of the project after installation.

[0033] Based on the above summary of the problems, the specific solution for improving the equipment and providing a plastic pipe expansion device is as follows:

[0034] It includes a rack for providing support for the entire device. The rack is a long rectangular metal frame structure, and various functional mechanisms are arranged in its length direction.

[0035] The rack comprises a lower rack 1 and an upper rack 2, which are positioned vertically opposite each other. The lower rack 1 is secured to the workshop floor via support legs, while the upper rack 2 is positioned above the lower rack 1 and is used to mount equipment above it. Machine plates can be placed on either side of the upper rack 2 and lower rack 1 to secure the upper rack 2 and conceal the flared opening. (To facilitate visualization of the internal structure, the machine plates are not shown in the figure.)

[0036] The frame is equipped with at least two sets of swivel rollers 3, which are used to support the pipe. Specifically, the swivel rollers 3 include two symmetrically arranged plastic rollers with parallel axes, which are used to support the pipe on both sides. A first rotating shaft is installed through the rollers, and the two ends of the first rotating shaft are respectively mounted on a first bearing seat 4, the bottom of which is fixedly mounted on the frame.

[0037] The first step in the expansion production process is to load the rotary roller group 3, which can be loaded automatically or manually through various existing methods such as translation loading, robot loading, and manual loading.

[0038] A first pulley 5 or a first sprocket is provided at one end of the first rotating shaft. Taking the pulley structure as an example, a first motor is mounted at the bottom of the frame. The drive shaft of the first motor is driven by the first pulley 5 via a first transmission belt to drive the first rotating shaft. This controls the rotation of the supporting rollers, and when they rotate in the same direction, the pipe is driven in a circumferential direction.

[0039] Two pressure rollers 6 are arranged in parallel above the rotary support roller located in the middle. The pressure rollers 6 are symmetrically arranged on both sides of the pipe. The pressure rollers 6 are installed on the first wheel frame 7. The first wheel frame 7 is a U-shaped frame structure. The pressure roller 6 is penetrated by a second rotating shaft connected to it for rotation. The first wheel frame 7 is provided with a horizontally extending waist-shaped hole 8 at the position corresponding to the second rotating shaft. Both ends of the second rotating shaft pass through the waist-shaped hole 8 and are fixed by nuts, so that the distance between the two pressure rollers 6 can be adjusted.

[0040] Two vertical and symmetrical first polished rods 9 are fixed to the top of the first wheel frame 7. A first sliding sleeve is sleeved on the first polished rod 9 to slide with it. The first sliding sleeve is fixed to the upper frame 2. The upper frame 2 is also equipped with a first cylinder 10, which can be an electric push cylinder or a pneumatic cylinder 37. The bottom end of the first cylinder 10 is provided with a first cylinder rod 11 that telescopically cooperates with it. The bottom end of the first cylinder rod 11 is fixed to the first wheel frame 7. This enables the pressure wheel 6 to rise and fall. When it lands, it presses on the surface of the pipe and cooperates with the supporting wheel to rotate the pipe.

[0041] Two second bearing blocks 12 are also mounted on the lower frame 1. A second rotating shaft is rotatably mounted between the second bearing blocks 12. A lower push wheel 13 is provided on the second rotating shaft. The axial direction of the lower push wheel 13 is perpendicular to the supporting wheel. The axial direction of the lower push wheel 13 is arranged horizontally relative to the frame, and is used to support the pipe under the pipe to drive the pipe forward and backward. The center of the lower push wheel 13 is provided with a V-shaped groove 14 surrounding its circumference. The V-shaped groove 14 is used to receive the pipe and achieve contact on both sides of the bottom surface of the pipe. A second pulley 15 is provided at one end of the second rotating shaft. A second motor is mounted at the bottom of the lower frame 1. The output shaft of the second motor is driven by the second pulley 15 to realize the rotation control of the lower push wheel 13.

[0042] Above the lower push wheel 13, there is an upper push wheel 16 that is flush with it from top to bottom. The center of the upper push wheel 16 is also provided with a V-shaped groove 14. The upper push wheel 16 and the lower push wheel 13 are clamped up and down to drive the pipe. The upper push wheel 16 is rotatably mounted on a second wheel frame 17. The second wheel frame 17 is also a U-shaped plate frame structure. Two vertical and bilaterally symmetrical second polished rods 18 are provided above the second wheel frame 17. The second polished rods 18 are sleeved with second sliding sleeves, which are fixed to the upper frame 2. The upper frame 2 is also equipped with a second cylinder body 19. The bottom end of the second cylinder body 19 is provided with a second cylinder rod 20 that is telescopically matched with it. The bottom end of the second cylinder rod 20 is fixed to the second wheel frame 17.

[0043] The frame is provided with a clamping mechanism, a heating mechanism and an expanding mechanism in sequence along its length direction.

[0044] The clamping mechanism is located in the middle of the frame and is arranged on one side of all the rotary support wheel groups 3.

[0045] The clamping mechanism, located between the rotating roller assembly 3 and the heating mechanism, is used to clamp and secure the pipe once it has reached its intended position. The clamping mechanism comprises two lifting rails 21 fixed to the frame. These rails are equipped with an upper clamp 22 and a lower clamp 23 that slide vertically with them. The upper clamp 22 has a semicircular upper groove on its bottom, while the lower clamp 23 has a semicircular lower groove on its top. The inner diameters of the upper and lower grooves correspond to the outer diameter of the pipe, effectively clamping and positioning the pipe.

[0046] A third cylinder body 24 is provided above the upper clamp 22, and a third cylinder rod 25 is provided at the bottom of the third cylinder body 24 to cooperate with the third cylinder rod 25 for telescopic operation. The bottom end of the third cylinder rod 25 is fixed on the upper clamp 22, and a fourth cylinder body 26 is provided below the lower clamp 23. A fourth cylinder rod 27 is provided at the upper part of the fourth cylinder body 26 to cooperate with the fourth cylinder rod 27 for telescopic operation. The top end of the fourth cylinder rod 27 is fixed on the lower clamp 23. The relative opening and closing stroke in the clamping operation is driven and controlled by the third cylinder body 24 and the fourth cylinder body 26.

[0047] In this design, the heating mechanism and the flaring mechanism are set at the same workstation. After being fixed by the clamping mechanism, the two steps are completed simultaneously without secondary transfer and secondary positioning and clamping. The heating mechanism includes a heating sleeve 28, and two third polished rods 29 are provided above the heating sleeve 28. A lead screw 30 is provided between the third polished rods 29. The third polished rods 29 are sleeved with a third sliding sleeve that slides up and down with them. The third sliding sleeve is fixed to the upper frame 2. The lead screw 30 is sleeved with a nut that cooperates with it. The nut is also fixed to the upper frame 2. The lead screw 30 is driven by a motor, so that the lifting and lowering of the heating sleeve 28 can be controlled by the lead screw 30 and the third polished rods 29.

[0048] The heating sleeve 28 is an arc with an arc angle between 220-280 degrees, and has a notch arranged in the center at the bottom. In this design, the notch makes the heating sleeve 28 an arc structure of 270 degrees. Seven heating rods 31 are installed in a circular array on the inner wall of the heating sleeve 28. When the heating sleeve 28 is at the bottom of its stroke, the heating sleeve 28 is coaxial with the pipe. The pipe can enter the interior of the heating sleeve 28 through the notch and is heated and heated by the heating rods 31 installed on the inner wall of the heating sleeve 28. The notch at the bottom of the heating sleeve 28 allows the heating sleeve 28 to be connected to the pipe, so that the heating control can be achieved by raising and lowering the heating sleeve 28. The next step of processing can be carried out without returning the material or transferring the workstation. At the same time, this structure can "hold" heat, reduce heat loss, and maintain a better heating environment.

[0049] The flaring mechanism includes a mounting base 32, the bottom of which is fixed to the lower frame 1, providing stable support during the flaring stroke. A mounting bracket 33 is located on the top of the mounting base 32. This bracket 33 is used to secure a watering pipe. The watering pipe is a gooseneck or plastic pipe with adjustable curvature and position. Multiple watering pipes are connected to the cooling water system to cool the pipe after flaring.

[0050] The fixed seat 32 is provided with a horizontally extending sliding rod 34, and the sliding rod 34 is arranged on the side of the fixed seat 32 away from the clamping mechanism. The sliding rod 34 is slidably fitted with a travel seat 35, and the travel seat 35 is provided with a sleeve 36 that slides with the sliding rod 34. The sleeve 36 is sleeved on the outside of the sliding rod 34. The sliding rod 34 and the sliding sleeve matrix are distributed in 4 groups to achieve good constraint on the linear stroke.

[0051] A cylinder 37 is fixedly installed at the end of the lower frame 1. The cylinder 37 is connected to the air source in the workshop and has sufficient power and precision control. The cylinder 37 is equipped with a push rod 38 with a telescopic stroke. The end of the push rod 38 away from the cylinder 37 is fixed on the stroke seat 35, providing sufficient power for the propulsion of the core piece 39.

[0052] A horizontally extending core piece 39 is provided on the stroke seat 35. The core piece 39 is cylindrical and coaxial with the pipe. The end of the core piece 39 close to the heating sleeve 28 is provided with a groove surface 40 corresponding to the required expansion. The end of the groove surface 40 close to the heating sleeve 28 is provided with a small guide section 41. The guide section 41 is a cylinder with a chamfered front end for better insertion into the pipe.

[0053] A positioning sleeve 43 is fixedly provided on the fixing seat 32. The positioning sleeve 43 is a circular tube sleeve structure coaxial with the core member 39. The end of the positioning sleeve 43 away from the clamping mechanism is fixed to the fixing seat 32, and the end of the positioning sleeve 43 close to the clamping mechanism is located below the heating sleeve 28. The positioning sleeve 43 is used to extend toward the heating sleeve 28, extending the flaring operation to below the heating sleeve 28, so that the pipe can be flared directly during heating, or the pipe can be flared directly without moving the pipe in position after heating. A circular opening 44 that is adapted to the outer diameter of the core member 39 is provided on the circular end surface of the positioning sleeve 43 close to the clamping mechanism. A distance sensor 45 is installed in the center of the upper edge of the opening 44. Based on the installation position of the sensor, it can correspond to the end face of one end of the pipe opening after flaring, thereby obtaining the retraction distance data of the flared end pipe opening.

[0054] A position sensor is installed under the positioning sleeve 43, which locates the position of the pipe. When the pipe mouth reaches the front end of the port 44, the position sensor is triggered. The position sensor is connected to the second motor signal to feed back a stop signal to the second motor to stop the forward advancement of the pipe.

[0055] When the pipe reaches the position of the mouth 44, that is, the front end of the positioning sleeve 43, the pipe is fixed and heated. After punching and expanding, if the pipe shrinks, the position of its punched end face is measured by the distance sensor 45 to obtain the shrinkage length of the pipe mouth, and the depth of the first expansion is known based on the shrinkage length.

[0056] The core member 39 is driven by the cylinder 37 and has a fixed stroke Df and an adjustable stroke Dx in one operation based on a time sequence. The Df is a set linear stroke of a fixed length, corresponding to the predetermined flaring depth. The Dx corresponds to the retraction distance data obtained by the distance sensor 45, supplementing the required flaring depth difference.

[0057] The core piece 39 is provided with a laser diameter sensor 42 at the front end near the heating sleeve 28. The diameter sensor 42 is used to measure the inner diameter. Since the diameter sensor 42 is installed at the front end of the groove surface 40, it can measure the inner diameter of the part of the pipe near the flaring.

[0058] Furthermore, in order to obtain comprehensive data of the pipe after punching, a micrometer 46 is installed on the lower frame 1 near the clamping mechanism, and an equipment box 47 is set on the lower frame 1. A lifting seat with an electrically controlled lifting stroke is installed in the equipment box 47. The micrometer 46 is installed on the lifting seat. When the lifting seat is at the top of its stroke, its probe contacts the pipe wall on the bottom surface of the pipe. As the pipe retreats (the material is withdrawn along the length direction of the frame), the straightness between the clamping position and the flaring position of the pipe can be obtained, that is, whether there is any bending, so as to judge whether the degree of bending is within the allowable quality range. If it exceeds the quality requirements, an alarm will be issued and the pipe will be scrapped or post-processed.

[0059] Based on the above structure, the expansion processing equipment performs the following operations based on the time sequence:

[0060] S1, loading the plastic pipe onto the rotary support wheel assembly 3;

[0061] S2, the upper push wheel 16 slides downward until it compacts the surface of the pipe, and the lower push wheel 13 is started to drive the pipe to feed linearly in the direction of the expansion mechanism until the position sensor determines that the pipe mouth reaches the position of the pass 44 of the positioning sleeve 43, and then stops;

[0062] S3, the heating jacket 28 falls until the pipe is covered inside and starts heating, the pressing wheel 6 falls and compacts the pipe surface, and the rotary roller assembly 3 drives the pipe to rotate circumferentially and heat it evenly. After heating is completed, the rotary roller assembly 3 stops rotating;

[0063] S4, the upper clamp 22 and the lower clamp 23 are centered and closed to fix the pipe;

[0064] S5, the travel seat 35 performs the fixed stroke Df to expand the pipe head;

[0065] S6, the distance sensor 45 obtains the retraction distance data of the nozzle and adjusts the stroke Dx based on the data to complete the expansion;

[0066] S7, spraying the pipe nozzle to cool it down;

[0067] S8, the upper clamp 22 and the lower clamp 23 are released, and the rotary roller assembly 3 starts to rotate again. During the rotation of the pipe, the diameter measuring sensor 42 obtains the inner diameter and roundness data of the pipe near the flaring position;

[0068] S9, the travel seat 35 retreats and disengages from the pipe head, and the lower push wheel 13 is reversed and started for the second time to make the pipe exit the clamping mechanism. During the exit process, the micrometer 46 is raised to measure the straightness of the pipe wall.

[0069] In the above steps, the heating jacket 28 can be raised between s3 and s4, or between s6 and s7. In the former, the nozzle is expanded after the heating jacket 28 is raised, while in the latter, the nozzle is expanded while the heating jacket 28 remains at the nozzle. The latter is preferred because it ensures that the temperature of the nozzle head is maintained during the two expansions.

[0070] This equipment utilizes the same station layout for the heating and flaring stages, ensuring precise control of the tube head temperature during the flaring process while reducing processing time and steps. The flaring process considers the multi-dimensional impact of the tube head, providing targeted data feedback on tube head setback issues to achieve precise control of the flaring depth. By inspecting the straightness from the clamping section to the flared section, as well as testing the internal data of the tube near the flared end, comprehensive monitoring of the tube material quality at the flared end is achieved. This allows for timely feedback on issues, providing timely feedback and corrections during production, eliminating poor quality products, and enabling timely remediation of detected issues in subsequent processes.

[0071] In short, this equipment has significant advantages in improving product quality, simplifying operation steps and improving production efficiency.

Claims

1. An integrated expansion device for plastic pipes, characterized in that: The machine comprises a frame, wherein a clamping mechanism, a heating mechanism and a flaring mechanism are installed along the length direction of the frame near one end of the frame, and the heating mechanism and the flaring mechanism are arranged at the same station; The heating mechanism includes a heating sleeve, which is installed on the frame in a liftable manner. A notch is provided in the center of the bottom of the heating sleeve, so that the heating sleeve forms an arc structure with an arc of 220-280 degrees. When the heating sleeve is at the bottom of its stroke, it is coaxial with the plastic pipe. The expanding mechanism includes a fixed seat, and a travel seat with a stroke in the same direction as the length direction of the pipe is provided on the side of the fixed seat away from the heating sleeve. The travel seat has a fixed stroke Df and an adjustable stroke Dx in one expanding operation. A core is fixed on the travel seat. A positioning sleeve is fixed on the seat, and a circular opening adapted to the core piece is provided on the end face of the positioning sleeve close to the heating sleeve. The opening is located below the heating sleeve, and a distance sensor is installed on the edge of the opening. The fixed stroke Df is a linear stroke corresponding to the predetermined flaring depth, and the adjustment stroke Dx corresponds to the retraction distance data obtained by the distance sensor; and the following process is executed based on the timing: the stroke seat executes the fixed stroke Df to flare the pipe head; the distance sensor obtains the retraction distance data of the pipe mouth, and executes the adjustment stroke Dx based on the data to complete the flaring.

2. The integrated expansion device for plastic pipes according to claim 1, characterized in that: The front end of the core piece close to the heating sleeve is provided with a groove surface, the front end of the groove surface is provided with a guide section, and the front end of the guide section is installed with a diameter measuring sensor.

3. The integrated expansion device for plastic pipes according to claim 1, characterized in that: A device box is provided on the frame, and the device box is located below the pipe. A lifting seat with an electrically controlled lifting stroke is installed in the device box, and a micrometer is installed on the lifting seat. When the lifting seat is at the top of its stroke, the probe of the micrometer contacts the pipe wall on the bottom surface of the pipe. The micrometer is arranged close to the clamping mechanism.

4. The integrated expansion device for plastic pipes according to claim 1, characterized in that: The fixed seat is provided with a horizontally extending sliding rod, and the sliding rod is arranged on the side of the fixed seat away from the clamping mechanism. The travel seat is provided with a sleeve that slides with the sliding rod, and the sleeve is sleeved on the outside of the sliding rod. The sliding rod and sliding sleeve matrix is ​​distributed into 4 groups and is arranged around the core piece.

5. The integrated expansion device for plastic pipes according to claim 1, characterized in that: A fixing frame is provided on the top side of the fixing seat, and the fixing frame is used to fix the water spraying pipes, and there are multiple water spraying pipes.

6. The integrated expansion device for plastic pipes according to claim 1, characterized in that: The clamping mechanism includes an upper clamp and a lower clamp with a relative approach or separation stroke. The bottom side of the upper clamp is provided with an upper clamping groove that is nearly semicircular, and the top side of the lower clamp is provided with a lower clamping groove that is nearly semicircular.

7. The integrated expansion device for plastic pipes according to claim 1, characterized in that: The frame includes an upper frame and a lower frame that are fixedly installed, and the upper frame and the lower frame are correspondingly arranged up and down; At least two groups of swivel roller groups are installed on the lower frame, and the swivel roller groups include two supporting rollers arranged in parallel, and the two supporting rollers are symmetrically arranged in the same direction relative to the pipe. The supporting rollers are rotatably installed on the lower frame through bearing seats, wherein at least one group of swivel roller groups is provided with two pressing rollers above, and the pressing rollers are rotatably installed on the first wheel frame, and the first wheel frame is liftably installed on the upper frame, and when the first wheel frame is at the bottom of its stroke, the surface of the pressing roller is in close contact with the pipe; A lower push wheel is rotatably mounted on the lower frame, and the lower push wheel is centrally mounted below the pipe. An upper push wheel is provided above the lower push wheel, and the upper push wheel is rotatably mounted on the second wheel frame, and the second wheel frame is liftably mounted on the upper frame. When the second wheel frame is at the bottom of its stroke, the surface of the upper push wheel is in close contact with the pipe, and a V-shaped groove is provided in the middle of the upper push wheel and the lower push wheel.

8. The integrated expansion device for plastic pipes according to claim 7, characterized in that: A position sensor is installed below the positioning sleeve, and the position sensor is used to provide feedback data to the lower push wheel and / or the upper push wheel.

9. The integrated expansion device for plastic pipes according to claim 7, characterized in that: The pressure wheel is penetrated by a second rotating shaft connected to the pressure wheel for rotation. The first wheel frame is provided with a waist-shaped hole extending horizontally at a position corresponding to the second rotating shaft. Both ends of the second rotating shaft pass through the waist-shaped hole and are fixed by nuts.

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