Flaring device for plastic pipe fitting

Abstract

The invention discloses a plastic pipe fitting flaring device which comprises a base control assembly and a flaring shaping mechanism, a clamping rotating assembly assembled through bolts is arranged on the inner side of the middle of the base control assembly, and a plastic pipe fitting body clamped in a rolling mode is arranged at the output end of the clamping rotating assembly. A heating mechanism assembled through bolts is arranged above the periphery of the base control assembly. According to the device, a clamping rotating assembly is mainly used for adaptively clamping a plastic pipe fitting body needing to be machined, in the clamping process, a hollow shell is adjusted to the proper height position through output operation of a hydraulic oil cylinder, a push rod and a lifting block, and after spiral adjustment of a built-in motor, a threaded strip and a threaded cabin, the plastic pipe fitting body needs to be machined; and the combined base, the hinge rod and the expanding and shrinking strip are driven to operate in a hinge transmission manner, so that the shaping guide wheel is used for performing adaptive flaring adjustment on the adaptively clamped plastic pipe fitting body, and the tedious degree of multiple operations is reduced while diversified processing is realized.

Description

Technical Field

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

[0002] Plastic pipes are generally made of synthetic resin, that is, polyester as raw material, with the addition of stabilizers, lubricants, plasticizers, etc., and are extruded in a pipe making machine by the method of "plasticization". They are mainly used as pipes for tap water supply systems in buildings, drainage, exhaust and sewage sanitary pipes, underground drainage pipe systems, rainwater pipes, and threading pipes for supporting wire installation, etc. Plastic pipes are divided into two categories: thermoplastic plastic pipes and thermosetting plastic pipes. Thermoplastic ones include polyvinyl chloride pipes, polyethylene pipes, polypropylene pipes, polyoxymethylene pipes, etc.; thermosetting ones include phenol plastic pipes, etc. For some special pipe fittings, such as pipe fittings in air conditioners, washing machines and other equipment, it is necessary to expand the pipe fittings at the pipe mouth during production and processing to increase the size of the pipe fittings at the pipe mouth, so as to facilitate the connection of external components. The expansion processing of the pipe fittings at the pipe mouth is a method of using a mold with a rotary extrusion method. The outer wall of the processed pipe fitting is extruded by the high-speed rotation of the mold to increase the diameter of the pipe mouth to the required size. This method can meet its basic use needs.

[0003] When the existing plastic pipe expanding device is in use, such as application number CN201911192813.4, which discloses a plastic pipe expanding processing device, it includes a base plate and a shaping component, a limit cavity running through the upper and lower parts is opened in the inner central position of the base plate, a bracket is arranged on the inner side of the limit cavity, and the shaping component is fixed on the bracket accordingly, a vertical rod is fixed on the left part of the upper surface of the base plate, a top plate is arranged on the upper end of the vertical rod, a hydraulic driving mechanism is installed on the lower surface of the top plate, a lower pressure block is fixed on the output shaft at the lower end of the hydraulic driving mechanism, and the lower pressure block is vertically arranged above the shaping component, and the interior of the shaping component includes a shaping tube and a conical seat installed at the lower end of the shaping tube. The present invention sets a bracket and a shaping component, and the shaping tube and the conical seat in the shaping component can be flexibly adjusted, so as to meet the expansion processing of various models and thicknesses of pipe fittings, and can also meet the processing requirements of various pipe opening curvatures and sizes, and the processing is more diversified; however, in the above technology, the positioning rod and the hollow frame body are fixed structures, so when processing diversified products, multiple manual operations are still required to replace and set accessories, resulting in unnecessary cumbersome operations. For this reason, we propose a plastic pipe expanding device to solve the above problems. Summary of the invention

[0004] In view of the above problems, the present invention proposes a plastic pipe expanding device, which mainly utilizes a clamping and rotating assembly to adaptively clamp the plastic pipe body to be processed. During the clamping process, the hollow shell is adjusted to a suitable height position through the output operation of the hydraulic cylinder, the push rod, and the lifting block. After spiral adjustment of the built-in motor, the threaded strip, and the threaded cabin, the combined base, the hinge rod, and the expansion and contraction strip are hinge-driven. In this way, the shaping guide wheel can adaptively expand the adaptively clamped plastic pipe body, thereby having diverse processing while also reducing the tediousness of multiple operations.

[0005] To achieve the above object, the present invention provides the following technical solutions: A plastic pipe expanding device includes a base control component and a expanding shaping mechanism, wherein a clamping and rotating component assembled with bolts is arranged on the inner side of the middle part of the base control component, and a rolling clamping plastic pipe body is arranged on the output end of the clamping and rotating component, a heating mechanism assembled with bolts is arranged above the four sides of the base control component, and a expanding and shaping mechanism assembled with bolts is arranged on the top of the heating mechanism.

[0006] As a further technical solution, the base control assembly includes a pad, a base plate, surrounding frames, a processing table and a control panel. The base plate is arranged on the top side of the pad, and surrounding frames are arranged above the four sides of the base plate. The processing table is arranged on the top of the surrounding frames, and a control panel is arranged on the front side of the processing table.

[0007] As a further technical solution, the clamping rotating assembly includes a lower bolt plate, a speed change case, a driving motor, a first gear set, a second gear set, an upper bolt plate, a rotating base, a top base, an external slotted bin, a transverse screw rod, a sliding base, a split plate, a positioning cylinder, a wheel frame and a clamping wheel. The lower bolt plate is arranged below the middle part of the processing table, a speed change case is arranged below the lower bolt plate, and a driving motor is arranged below one end of the speed change case, a first gear set is arranged at the output end of the driving motor, and a second gear set is arranged at the output end of the first gear set.

[0008] As a further technical solution, an upper bolt plate is provided at the output end of the second gear group, and a rotating base is provided above the upper bolt plate, a top base is provided above the rotating base, and an outer slotted bin is provided on the side of the top base, a transverse screw rod is provided inside the outer slotted bin, and the transverse screw rod is threadedly connected to a sliding base.

[0009] As a further technical solution, a split plate assembled with bolts is arranged above the sliding base, and a positioning cylinder is arranged on the inner side above the split plate, a wheel frame is arranged at the output end of the positioning cylinder, and a clamping wheel is arranged on the inner side of the wheel frame.

[0010] As a further technical solution, the heating mechanism includes a bolt base, a slotted frame, a lifting screw, a lifting beam, a clamping cylinder, a heat insulation board, a fire-setting cover, an electric shock head, a nozzle, an air pipe and a control air valve. The bolt base is bolted to the top of the processing table on all sides. A slotted frame is arranged above the bolt base, and the slotted frame is threadedly connected to the lifting beam through the lifting screw. A clamping cylinder is arranged on the inner side of the lifting beam.

[0011] As a further technical solution, a heat insulation plate is provided at the output end of the clamping cylinder, and a fire-setting hood is provided on the inner side of the heat insulation plate, an electric shock head is provided at one end of the fire-setting hood, an array of nozzles is provided on the inner side of the fire-setting hood, and the output end of the control air valve is connected to the top of the fire-setting hood through an air pipe sleeve.

[0012] As a further technical solution, the expansion and forming mechanism includes a perforated plate, a top base, a cylinder base, a hydraulic cylinder, a push rod, a lifting block, a hoisting disk, a hollow shell, a built-in motor, a threaded strip, a threaded cabin, a combined base, a hinge rod, an expansion and contraction strip and a forming guide wheel. The perforated plate is threadedly connected to the top of the slotted frame, a top base is arranged above the perforated plate, and a cylinder base is arranged on the inner side of the top base, a hydraulic cylinder is arranged above the cylinder base, and a push rod is arranged at the output end of the hydraulic cylinder, a lifting block is arranged below the push rod, and the bottom end of the lifting block is connected to the hollow shell through the hoisting disk bolts.

[0013] As a further technical solution, a built-in motor is arranged inside the hollow shell, and a threaded strip is arranged at the output end of the built-in motor, a threaded cabin is arranged on the outer side of the threaded strip, a combined base is arranged at the bottom end of the threaded strip, and the combined base is hingedly connected to a hinge rod, a hinged expansion strip is arranged at the outer end of the hinge rod, and a shaping guide wheel is arranged at the outer end of the expansion strip.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The device of the invention mainly utilizes a clamping and rotating assembly to adaptively clamp the plastic pipe body that needs to be processed. During the clamping process, the hollow shell is adjusted to a suitable height position through the output operation of the hydraulic cylinder, push rod, and lifting block. After spiral adjustment of the built-in motor, threaded strip, and threaded chamber, the combined base, hinge rod, and expansion and contraction strip are hinge-driven. In this way, the shaping guide wheel can adaptively expand the plastic pipe body that is adaptively clamped, thereby having diverse processing while also reducing the tediousness of multiple operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a plastic pipe expansion device; Figure 2 It is a schematic diagram of the structure of the present invention from a side view; Figure 3 It is a structural schematic diagram of the clamping and rotating assembly in the present invention; Figure 4 It is a schematic diagram of the structure of the first gear set and the second gear set in the present invention; Figure 5 It is a structural schematic diagram of the heating mechanism in the present invention; Figure 6 It is a structural schematic diagram of the expansion and shaping mechanism in the present invention; Figure 7 It is a schematic diagram of the structure of the lifting plate and the hollow shell in the present invention.

[0016] In the figure: 1. base control assembly; 101. pad; 102. base plate; 103. surrounding frame; 104. processing table; 105. control panel; 2. clamping and rotating assembly; 201. lower bolt plate; 202. transmission case; 203. driving motor; 204. first gear set; 205. second gear set; 206. upper bolt plate; 207. rotating base; 208. top base; 209. external slotted bin; 2010. transverse screw rod; 2011. sliding base; 2012. split plate; 2013. positioning cylinder; 2014. wheel frame; 2015. clamping wheel; 3. plastic pipe body; 4. heating mechanism; 401. bolt base ; 402, slotting frame; 403, lifting screw rod; 404, lifting beam; 405, clamping cylinder; 406, heat insulation board; 407, fire hood; 408, electric shock head; 409, nozzle; 4010, air pipe; 4011, control air valve; 5, expansion and shaping mechanism; 501, perforated plate; 502, top base; 503, cylinder base; 504, hydraulic cylinder; 505, push rod; 506, lifting block; 507, lifting plate; 508, hollow shell; 509, built-in motor; 5010, threaded strip; 5011, threaded cabin; 5012, combined base; 5013, hinge rod; 5014, expansion and contraction strip; 5015, shaping guide wheel. DETAILED DESCRIPTION

[0017] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0018] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-7 In an embodiment of the present invention, a plastic pipe expanding device includes a base control component 1 and an expanding shaping mechanism 5, a clamping rotating component 2 assembled with bolts is arranged on the inner side of the middle part of the base control component 1, and a rolling clamping plastic pipe body 3 is arranged on the output end of the clamping rotating component 2, a heating mechanism 4 assembled with bolts is arranged above the four sides of the base control component 1, and an expanding shaping mechanism 5 assembled with bolts is arranged on the top of the heating mechanism 4.

[0021] The base control assembly 1 includes a cushion block 101, a base plate 102, a surrounding frame 103, a processing table 104 and a control panel 105. The base plate 102 is arranged on the top side of the cushion block 101, and the surrounding frames 103 are arranged above the four sides of the base plate 102. The processing table 104 is arranged on the top of the surrounding frames 103, and the control panel 105 is arranged on the front side of the processing table 104.

[0022] In the embodiment of the present invention, when in use, the equipment is placed at the processing site by means of the cushion block 101 in cooperation with the base plate 102, the various components are effectively assembled and combined by means of the surrounding frames 103 in cooperation with the processing table 104, and the instructions are output and executed through the control panel 105 on the front side of the processing table 104.

[0023] The clamping rotating assembly 2 includes a lower bolt plate 201, a speed change case 202, a driving motor 203, a first gear set 204, a second gear set 205, an upper bolt plate 206, a rotating base 207, a top base 208, an external slotted bin 209, a transverse screw rod 2010, a sliding base 2011, a split plate 2012, a positioning cylinder 2013, a wheel frame 2014 and a clamping wheel 2015. The lower bolt plate 201 is arranged at the lower middle part of the processing table 104, the speed change case 202 is arranged below the lower bolt plate 201, and the driving motor 203 is arranged below one end of the speed change case 202, the output end of the driving motor 203 is provided with a first gear set 204, and the output end of the first gear set 204 is provided with a second gear set 205.

[0024] In an embodiment of the present invention, when processing is required, the drive motor 203 is used to output power to drive the output end to operate, so that after the drive motor 203 outputs power and operates, it can drive the first gear set 204 and the second gear set 205 in the transmission case 202 to perform output transmission operation, so that the output operation of the clamping rotating component 2 can drive the plastic pipe body 3 to operate efficiently.

[0025] An upper bolt plate 206 is provided at the output end of the second gear set 205, and a rotating base 207 is provided above the upper bolt plate 206, a top base 208 is provided above the rotating base 207, and an outer slotted bin 209 is provided on the side of the top base 208, a transverse screw rod 2010 is provided inside the outer slotted bin 209, and the transverse screw rod 2010 is threadedly connected to the sliding base 2011.

[0026] In an embodiment of the present invention, when processing is required, the external slotted bin 209 on the side of the top base 208 is used to output power at the output end to drive the output end to operate, so that after the transverse screw rod 2010 outputs and operates, it can drive the sliding base 2011 to adjust to a suitable position and place the plastic pipe body 3 on the opposite side of the split plate 2012.

[0027] A split plate 2012 assembled with bolts is arranged above the sliding base 2011, and a positioning cylinder 2013 is arranged on the inner side above the split plate 2012. A wheel frame 2014 is arranged at the output end of the positioning cylinder 2013, and a clamping wheel 2015 is arranged on the inner side of the wheel frame 2014.

[0028] In the embodiment of the present invention, the positioning cylinder 2013 on the split plate 2012 is then used to output power to drive the output end to operate, so that the wheel frame 2014 outputs the clamping wheel 2015 to effectively clamp the plastic pipe body 3.

[0029] The heating mechanism 4 includes a bolt base 401, a slotted frame 402, a lifting screw 403, a lifting beam 404, a clamping cylinder 405, a heat insulation board 406, a fire hood 407, an electric shock head 408, a nozzle 409, an air pipe 4010 and a control air valve 4011. The bolt base 401 is bolted to the top of the processing table 104 on all sides. A slotted frame 402 is arranged above the bolt base 401, and the slotted frame 402 is threadedly connected to the lifting beam 404 through the lifting screw 403. The inner side of the lifting beam 404 is provided with a clamping cylinder 405 installed in a sleeve manner.

[0030] In an embodiment of the present invention, when processing is required, the output power of the output end on the slotted frame 402 is used to drive the output end to operate, so that after the lifting screw rod 403 outputs and operates, the lifting beam 404 can be lifted to a suitable height, and the clamping cylinder 405 outputs power to drive the output end to operate, so that the insulation board 406 is adjusted to a suitable position.

[0031] The output end of the clamping cylinder 405 is provided with a heat insulation plate 406, and a fire-setting hood 407 is provided on the inner side of the heat insulation plate 406, an electric shock head 408 is provided at one end of the fire-setting hood 407, and an array of nozzles 409 are provided on the inner side of the fire-setting hood 407. The output end of the control gas valve 4011 is connected to the top of the fire-setting hood 407 through an air pipe 4010.

[0032] In the embodiment of the present invention, the control gas valve 4011 is then used to perform output operation, and the connecting gas pipe 4010 is sprayed through the nozzle 409 on the fire hood 407, and the electric shock head 408 is electrically shocked to achieve the effect of ignition, so that the flame effectively heats the plastic pipe body 3.

[0033] The expansion shaping mechanism 5 includes a perforated plate 501, a top base 502, a cylinder base 503, a hydraulic cylinder 504, a push rod 505, a lifting block 506, a lifting plate 507, a hollow shell 508, a built-in motor 509, a threaded strip 5010, a threaded cabin 5011, a combined base 5012, a hinge rod 5013, an expansion strip 5014 and a shaping guide wheel 5015. The perforated plate 501 is threadedly connected to the slot At the top of the frame 402, a top base 502 is arranged above the perforated plate 501, and a cylinder base 503 is arranged on the inner side of the top base 502, a hydraulic cylinder 504 is arranged above the cylinder base 503, and a push rod 505 is arranged at the output end of the hydraulic cylinder 504, a lifting block 506 is arranged below the push rod 505, and the bottom end of the lifting block 506 is bolted to a hollow shell 508 through a lifting plate 507.

[0034] In an embodiment of the present invention, when shaping and expanding is required, the cylinder base 503 on the top base 502 is used to output power through the hydraulic cylinder 504 to drive the output end to operate, so that the push rod 505 cooperates with the hollow shell 508 connected to the lifting plate 507 on the lifting block 506 to adjust to a height position suitable for processing.

[0035] A built-in motor 509 is arranged inside the hollow shell 508, and a threaded strip 5010 is arranged at the output end of the built-in motor 509, a threaded chamber 5011 is arranged on the outer side of the threaded strip 5010, a combined base 5012 is arranged at the bottom end of the threaded strip 5010, and the combined base 5012 is hingedly connected to a hinge rod 5013, a hinged expansion strip 5014 is arranged at the outer end of the hinge rod 5013, and a shaping guide wheel 5015 is arranged at the outer end of the expansion strip 5014.

[0036] In the embodiment of the present invention, the built-in motor 509 is then used to output power to drive the output end to operate, so that the threaded chamber 5011 cooperates with the threaded strip 5010 for spiral adjustment, so that the combined base 5012, the hinge rod 5013, and the expansion and contraction strip 5014 can be adjusted for expansion and contraction hinges, so that the shaping guide wheel 5015 can achieve the shaping processing effect for the plastic pipe body 3.

[0037] The working principle of the present invention is as follows: when in use, the device is placed at the processing site by means of the cushion block 101 in cooperation with the base plate 102, the various components are effectively assembled and combined by means of the surrounding frames 103 in cooperation with the processing table 104, the instructions are output and operated through the control panel 105 on the front side of the processing table 104, and when processing is required, the output end is driven to operate by the output power of the external slotted bin 209 on the side of the top base 208, so that the transverse screw rod 2010 can drive the sliding base 211 to be adjusted to a suitable position after output operation, and the plastic pipe body 3 is placed on the split side. On the opposite side of the plate 2012, the positioning cylinder 2013 on the split plate 2012 is then used to output power to drive the output end to operate, so that the wheel frame 2014 outputs to allow the clamping wheel 2015 to effectively clamp the plastic pipe body 3. When processing is required, the drive motor 203 is used to output power to drive the output end to operate, so that the drive motor 203 can drive the first gear set 204 and the second gear set 205 in the transmission case 202 to perform output transmission operation after the output power operation, so that the output operation of the clamping rotating component 2 can drive the plastic pipe body 3 to operate efficiently. When processing is required During processing, the output power of the output end on the slotting frame 402 is used to drive the output end to operate, so that the lifting screw rod 403 can be lifted to a suitable height after the output operation, and the clamping cylinder 405 outputs power to drive the output end to operate, so that the heat insulation board 406 is adjusted to a suitable position, and then the control valve 4011 is used to output and operate, and the connecting pipe 4010 is sprayed through the nozzle 409 on the fire hood 407, and the electric shock head 408 is electrically shocked to achieve the effect of ignition, so that the flame effectively heats the plastic pipe body 3, and when it is necessary to perform shaping and flaring When the processing is completed, the cylinder base 503 on the top base 502 is used to output power through the hydraulic cylinder 504 to drive the output end to operate, so that the push rod 505 cooperates with the hollow shell 508 connected to the lifting plate 507 on the upper lifting block 506 to adjust to a height position suitable for processing, and then the built-in motor 509 is used to output power to drive the output end to operate, so that the threaded cabin 5011 cooperates with the upper threaded strip 5010 to perform spiral adjustment, so that the combined base 5012, the hinge rod 5013, and the expansion and contraction strip 5014 are adjusted to expand and contract the hinge, so that the shaping guide wheel 5015 can achieve the shaping effect for the plastic pipe body 3.

[0038] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0039] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A plastic pipe expansion device, comprising a base control component (1) and an expansion shaping mechanism (5), characterized in that: A clamping rotating assembly (2) assembled with bolts is arranged on the inner side of the middle part of the base control assembly (1), and a rolling clamping plastic pipe body (3) is arranged at the output end of the clamping rotating assembly (2). A heating mechanism (4) assembled with bolts is arranged above the four sides of the base control assembly (1), and a flaring shaping mechanism (5) assembled with bolts is arranged at the top of the heating mechanism (4).

2. A plastic pipe expansion device according to claim 1, characterized in that: The base control assembly (1) comprises a cushion block (101), a base plate (102), a surrounding frame (103), a processing table (104) and a control panel (105); the base plate (102) is arranged on the top side of the cushion block (101), and the surrounding frames (103) are arranged above the four sides of the base plate (102); the processing table (104) is arranged on the top of the surrounding frames (103), and the control panel (105) is arranged on the front side of the processing table (104).

3. A plastic pipe expansion device according to claim 2, characterized in that: The clamping rotating assembly (2) comprises a lower bolt plate (201), a transmission case (202), a driving motor (203), a first gear set (204), a second gear set (205), an upper bolt plate (206), a rotating base (207), a top base (208), an external slotted bin (209), a transverse screw rod (2010), a sliding base (2011), a split plate (2012), a positioning cylinder (2013), a wheel frame (2014), and A clamping wheel (2015), the lower bolt plate (201) is arranged below the middle of the processing table (104), a transmission case (202) is arranged below the lower bolt plate (201), and a driving motor (203) is arranged below one end of the transmission case (202), a first gear set (204) is arranged at the output end of the driving motor (203), and a second gear set (205) is arranged at the output end of the first gear set (204).

4. A plastic pipe expansion device according to claim 3, characterized in that: An upper bolt plate (206) is provided at the output end of the second gear group (205), and a rotating base (207) is provided above the upper bolt plate (206), a top base (208) is provided above the rotating base (207), and an outer slotted bin (209) is provided on the side of the top base (208), a transverse screw rod (2010) is provided inside the outer slotted bin (209), and the transverse screw rod (2010) is threadedly connected to a sliding base (2011).

5. A plastic pipe expansion device according to claim 3, characterized in that: A split plate (2012) assembled with bolts is arranged above the sliding base (2011), and a positioning cylinder (2013) is arranged on the inner side above the split plate (2012), a wheel frame (2014) is arranged at the output end of the positioning cylinder (2013), and a clamping wheel (2015) is arranged on the inner side of the wheel frame (2014).

6. A plastic pipe expanding device according to claim 2, characterized in that: The heating mechanism (4) comprises a bolt base (401), a slotted frame (402), a lifting screw (403), a lifting beam (404), a clamping cylinder (405), a heat insulation board (406), a fire hood (407), an electric shock head (408), a nozzle (409), an air connection pipe (4010) and a control air valve (4011); the bolt base (401) is bolted to the top of the processing table (104) on all sides; a slotted frame (402) is arranged above the bolt base (401); and a lifting beam (404) is threadedly connected to the slotted frame (402) via a lifting screw (403); and a clamping cylinder (405) is arranged on the inner side of the lifting beam (404) and is sleeved and installed.

7. A plastic pipe expanding device according to claim 6, characterized in that: The output end of the clamping cylinder (405) is provided with a heat shield (406), and a fire-fixing cover (407) is provided on the inner side of the heat shield (406). An electric shock head (408) is provided at one end of the fire-fixing cover (407), and nozzles (409) distributed in an array are provided on the inner side of the fire-fixing cover (407). The output end of the control gas valve (4011) is connected to the top of the fire-fixing cover (407) through a connecting air pipe (4010).

8. A plastic pipe expanding device according to claim 6, characterized in that: The expansion and shaping mechanism (5) comprises a perforated plate (501), a top base (502), a cylinder base (503), a hydraulic cylinder (504), a push rod (505), a lifting block (506), a lifting plate (507), a hollow shell (508), a built-in motor (509), a threaded strip (5010), a threaded chamber (5011), a combined base (5012), a hinge rod (5013), an expansion and contraction strip (5014) and a shaping guide wheel (5015). The perforated plate (501) is threadedly connected to the slotted The top of the frame (402) is provided with a top base (502) above the perforated plate (501), and a cylinder base (503) is provided on the inner side of the top base (502), a hydraulic cylinder (504) is provided above the cylinder base (503), and a push rod (505) is provided at the output end of the hydraulic cylinder (504), a lifting block (506) is provided below the push rod (505), and the bottom end of the lifting block (506) is bolted to a hollow shell (508) via a lifting plate (507).

9. A plastic pipe expanding device according to claim 8, characterized in that: A built-in motor (509) is arranged inside the hollow shell (508), and a threaded strip (5010) is arranged at the output end of the built-in motor (509), a threaded chamber (5011) is arranged on the outer side of the threaded strip (5010), a combined base (5012) is arranged at the bottom end of the threaded strip (5010), and the combined base (5012) is hinge-connected to a hinge rod (5013), a hinge-connected expansion and contraction strip (5014) is arranged at the outer end of the hinge rod (5013), and a shaping guide wheel (5015) is arranged at the outer end of the expansion and contraction strip (5014).

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