Flanging and shaping mechanism for PFA (Polyfluoroalkoxy) material pipeline lining

Abstract

The utility model relates to a PFA (Polyfluoroalkoxy) material pipeline lining flanging shaping mechanism which comprises a bearing keel, a pressing mechanism, a pressing mechanism, turnover mechanisms, a pressure sensor, an irradiation heating mechanism, a non-contact temperature sensor, an annular driving guide rail and a driving circuit, a shaping cavity is formed in the bearing keel, and at least two turnover mechanisms are arranged on the upper end face of the bearing keel. Each turnover mechanism is connected with one pressing mechanism, the lower half part of each pressing mechanism is connected with the upper end face of the corresponding pressing mechanism through a pressure sensor, the pressing mechanisms are embedded in the molding cavity, and the irradiation heating mechanism and the non-contact temperature sensor are both in sliding connection with the inner side face of the bottom of the molding cavity through an annular driving guide rail. On one hand, cooperative operation with various devices can be effectively met, and efficient bending, flanging and forming operation of a PFA material lining layer is achieved; and on the other hand, the stability and the reliability of connection and positioning between the PFA material lining and the pipeline and the working efficiency of forming processing operation of the PFA material lining can be effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a PFA material pipeline lining turn -up plastic forming mechanism belongs to mechanical processing equipment technical field. BACKGROUND

[0002] Current in the PFA material of pipeline both ends outside is folded operation, often are in PFA material is under the condition of higher temperature, by plastic mould is driven under the extrusion mechanism to PFA material extrusion overturn, to reach the purpose of working operation, although this traditional processing mode can satisfy the need of production operation, but in the processing process, on one hand, the requirement of processing condition is higher, and processing equipment can satisfy the need of only certain pipe diameter structure processing, on the other hand, in processing, PFA material temperature control precision is insufficient, extrusion overturning force control precision is insufficient, and PFA material overturning angle is insufficient, and flange connection positioning is poor, or PFA material structure is damaged due to excessive pressure, etc.

[0003] Therefore, in view of this problem, the present application provides a PFA material pipeline lining turn -up plastic forming mechanism for solving the technical problems in the prior art. SUMMARY

[0004] In order to solve the deficiency of prior art, the present application provides a PFA material pipeline lining turn -up plastic forming mechanism, which has simple structure, high integration and modularity, and good versatility. On the one hand, it can effectively meet the cooperative operation with various equipment, realize efficient bending and forming operation of PFA material lining layer, thereby greatly improving the flexibility, versatility and environmental adaptability of the equipment. On the other hand, it can effectively meet the needs of bending and forming operation of PFA material lining layer of various pipe diameters, and effectively overcome the defects of uneven thickness, cracking and even breaking of PFA material lining layer at the bending part during the bending of PFA material lining by traditional equipment, thereby effectively improving the stability and reliability of the connection and positioning between PFA material lining and pipeline, and the working efficiency of PFA material lining forming operation.

[0005] The utility model provides a kind of PFA material pipeline lining flanging shaping mechanism, including bearing keel, pressing mechanism, pressing mechanism, turnover mechanism, pressure sensor, irradiation heating mechanism, non-contact temperature sensor, annular drive rail and drive circuit, bearing keel is circular table-like frame structure, bearing keel is in with its coaxial distribution shaping cavity, at least two turnover structures are provided in the corresponding bearing keel upper end surface position of shaping cavity, and each turnover mechanism is connected with a pressing mechanism, the lower half of pressing mechanism is located in shaping cavity and is connected with the upper end surface of pressing mechanism by pressure sensor, and each turnover mechanism is evenly distributed around the axis of shaping cavity, while the axis of pressing mechanism intersects with the axis of shaping cavity, pressing mechanism is embedded in shaping cavity, and is coaxially distributed with shaping cavity, irradiation heating mechanism, non-contact temperature sensor are at least two, each irradiation heating mechanism, non-contact temperature sensor is located in shaping cavity, and is slidably connected with the inside surface of the bottom of shaping cavity by annular drive rail, irradiation heating mechanism, non-contact temperature sensor are evenly distributed around the axis of shaping cavity, and non-contact temperature sensor is located between adjacent two irradiation heating mechanisms, drive circuit is connected with the outside surface of bearing keel, and is electrically connected with pressing mechanism, pressing mechanism, turnover mechanism, pressure sensor, irradiation heating mechanism, non-contact temperature sensor, annular drive rail respectively.

[0006] Further, the pressing mechanism includes a rack, a guide plate, a pressing plate, a drive rail, a temperature sensor, a pressure sensor, a horizontal drive mechanism, a telescopic drive column, and an inclination sensor. The rack is a hollow cylindrical frame structure, and the upper end surface thereof is connected with the pressing mechanism. The guide plate is at least four, is evenly distributed around the axis of the rack, and is an arc plate structure coaxially distributed with the rack. The upper half and the lower half of the guide plate are respectively connected with the rack through a horizontal drive mechanism. The axis of the horizontal drive mechanism intersects with the axis of the rack and is vertically distributed with the axis of the rack. The front end surface of the horizontal drive mechanism is hinged with the rear end surface of the guide plate. The outside surface of the rack between adjacent two guide plates is connected with a drive rail. The axis of the drive rail is parallelly distributed with the axis of the rack. The drive rail is connected with two telescopic drive columns through two sliders. The front end surface of one of the telescopic drive columns is hinged with the rear end surface of the pressing plate, and the front end surface of the other telescopic drive column is hinged with the upper end surface of the pressing plate. The lower end surface of the pressing plate forms an angle of 0°-90° with the axis of the rack. The axis of the telescopic drive column forms an angle of 0°-90° with the axis of the drive rail. The pressure sensor is arranged at the connection position of the horizontal drive mechanism and the guide plate and at the connection position of the telescopic drive column and the upper end surface of the pressing plate. The rear end surface of the guide plate and the upper end surface of the pressing plate are respectively connected with a temperature sensor and an inclination sensor. The temperature sensor, the pressure sensor, the horizontal drive mechanism, the telescopic drive column, and the inclination sensor are electrically connected with the drive circuit.

[0007] Further, the pressing mechanism, horizontal driving mechanism and telescopic driving column are any one of hydraulic telescopic rod, pneumatic telescopic rod and electric telescopic rod.

[0008] Further, the pressing plate is a circular arc plate structure with a rectangular cross section and coaxial with the rack, and a guide sliding groove is arranged on the upper end surface of the pressing plate and slidably connected with the front end surface of the telescopic driving column through a sliding block, and each pressing plate is distributed in a plane perpendicular to the axis of the rack and uniformly surrounds the axis of the rack, and adjacent two pressing plates are connected with each other through an elastic connecting belt and form a closed ring structure coaxial with the rack.

[0009] Further, at least two connecting sliding grooves are arranged on the front end surface of the pressing plate and vertically distributed with the lower end surface of the pressing plate, and a shaping plate is connected with the connecting sliding grooves, the shaping plate is a plate structure with a rectangular cross section and a circular arc plate structure coaxial with the pressing plate, and the plate surface of the shaping plate is vertically distributed with the lower surface of the pressing plate, and the pressing plate and the shaping plate form a groove structure with an "L" type cross section.

[0010] Further, the pressing mechanism is hingedly connected with the upper end surface of the rack, and a pressure sensor is arranged between the hinge and the upper end surface of the rack, and an adjusting groove is arranged on the upper end surface of the rack and corresponding to the pressing mechanism, the adjusting groove is distributed along the diameter direction of the rack, and the axis of each adjusting groove intersects with the axis of the rack, an installation block is arranged in the adjusting groove and slidably connected with the installation block, the installation block is a block structure with a rectangular cross section, the upper end surface of the installation block is connected with the pressure sensor, and the pressure sensor is hingedly connected with the pressing mechanism through the hinge, and a spring is arranged on the front end surface and the rear end surface of the installation block, the spring is embedded in the adjusting groove and vertically distributed with the axis of the adjusting groove, and the two ends of the spring are connected with the end surface of the installation block and the end surface of the adjusting groove.

[0011] Further, the driving circuit is a circuit system based on a programmable controller, and the driving circuit further comprises a control interface shared by any one or several of a display, a key, a potentiometer and a keyboard.

[0012] The novel device has simple structure, high integration and modularity and good universality, can effectively meet the collaborative operation with various devices, realize efficient bending and flanging forming operation of the PFA material lining layer, greatly improve the flexibility, universality and environmental adaptability of the device, effectively meet the needs of bending and flanging forming operation of the PFA material lining layer with various pipe diameters, and effectively overcome the defects of the PFA material lining layer, such as uneven thickness, cracks and even breakage, caused by the traditional device during the bending of the PFA material lining, thereby effectively improving the stability and reliability of the connection and positioning between the PFA material lining and the pipeline and the working efficiency of the PFA material lining forming operation. BRIEF DESCRIPTION OF DRAWINGS

[0013] The present application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0014] Figure 1 The present application is a schematic diagram of the structure.

[0015] Figure 2 The present application is a schematic diagram of the structure.

[0016] Figure 3 The present application is a schematic diagram of the structure.

[0017] Figure 4 The present application is a schematic diagram of the structure.

[0018] Figure 5 The present application is a schematic diagram of the structure.

[0019] Figure 6 The present application is a schematic diagram of the structure.

[0020] Figure 7 The present application is a schematic diagram of the structure. DETAILED DESCRIPTION

[0021] To make the technical means, creative features, purposes and effects of the present application easy to implement, the present application will be further described below in conjunction with specific embodiments.

[0022] As Figures 1-7As shown, a PFA material pipe lining flanging shaping mechanism, comprising a bearing keel 1, a pressing mechanism 2, a pressing down mechanism 3, a turnover mechanism 4, a pressure sensor 5, an irradiation heating mechanism 6, a non-contact temperature sensor 7, a ring-shaped driving guide rail 8 and a driving circuit 9, the bearing keel 1 is a circular table-shaped frame structure with axis parallel to the horizontal plane, the bearing keel 1 is provided with a shaping cavity 10 coaxially distributed therein, at least two turnover mechanisms 4 are arranged on the corresponding upper end surface of the bearing keel 1, each turnover mechanism 4 is connected with a pressing down mechanism 3, the lower half of the pressing down mechanism 3 is located in the shaping cavity 10 and is connected with the upper end surface of the pressing mechanism 2 through the pressure sensor 5, each turnover mechanism 4 is uniformly distributed around the axis of the shaping cavity 10, the axis of the pressing down mechanism 2 intersects with the axis of the shaping cavity 10, the pressing mechanism 2 is embedded in the shaping cavity 10 and is coaxially distributed with the shaping cavity 10, the irradiation heating mechanism 6 and the non-contact temperature sensor 7 are at least two, each irradiation heating mechanism 6 and non-contact temperature sensor 7 are located in the shaping cavity 10 and are slidably connected with the inner side surface of the bottom of the shaping cavity 10 through the ring-shaped driving guide rail 8, the irradiation heating mechanism 6 and the non-contact temperature sensor 7 are uniformly distributed around the axis of the shaping cavity 10, and the non-contact temperature sensor 7 is located between the adjacent two irradiation heating mechanisms 6, the driving circuit 9 is connected with the outer side surface of the bearing keel 1 and is electrically connected with the pressing mechanism 2, the pressing down mechanism 3, the turnover mechanism 4, the pressure sensor 5, the irradiation heating mechanism 6, the non-contact temperature sensor 7 and the ring-shaped driving guide rail 8.

[0023] The pressing mechanism 2 includes a frame 21, a guide plate 22, a pressing plate 23, a driving guide rail 24, a temperature sensor 25, a pressure sensor 5, a horizontal driving mechanism 27, a telescopic driving column 28, and an inclination sensor 29. The frame 21 is a hollow cylindrical frame structure, and the upper end surface thereof is connected with the pressing mechanism 3. The guide plate 22 is at least four, is evenly distributed around the axis of the frame 21, and is a circular arc plate structure coaxially distributed with the frame 21. The upper half and the lower half of the guide plate 22 are respectively connected with the frame 21 through a horizontal driving mechanism 27. The axis of the horizontal driving mechanism 27 intersects with the axis of the frame 21 and the guide plate 22, and is vertically distributed with the axis of the frame 21. The front end surface of the horizontal driving mechanism 27 is hingedly connected with the rear end surface of the guide plate 22, and the axis of the guide plate 22 forms an angle of 0°-60° with the axis of the frame 21. The outer side surface of the frame 21 between the adjacent two guide plates 22 is connected with a driving guide rail 24. The axis of the driving guide rail 24 is parallel to the axis of the frame 21. The driving guide rail 24 is connected with two telescopic driving columns 28 through two sliding blocks 26. The front end surface of one telescopic driving column 28 is hingedly connected with the rear end surface of the pressing plate 23, and the front end surface of the other telescopic driving column 28 is hingedly connected with the upper end surface of the pressing plate 23. The lower end surface of the pressing plate 23 forms an angle of 0°-90° with the axis of the frame 21, and the axis of the telescopic driving column 28 forms an angle of 0°-90° with the axis of the driving guide rail 24. The pressure sensor 5 is arranged at the position where the horizontal driving mechanism 27 is connected with the guide plate 22, and at the position where the telescopic driving column 28 is connected with the upper end surface of the pressing plate 23. The rear end surface of the guide plate 22 and the upper end surface of the pressing plate 23 are respectively connected with a temperature sensor 25 and an inclination sensor 29. The temperature sensor 25, the pressure sensor 5, the horizontal driving mechanism 27, the telescopic driving column 28, and the inclination sensor 29 are electrically connected with a driving circuit 9.

[0024] The two horizontal driving mechanisms are arranged on the guide plate, and the telescopic amount of the two horizontal driving mechanisms is simultaneously adjusted. On the one hand, the overall working outer diameter of the pressing mechanism is adjusted, so that the pressing mechanism can be used for different pipe diameter pressing operations. On the other hand, the telescopic amount of the two horizontal driving mechanisms is adjusted, so that the inclination angle of the guide plate is adjusted, and the telescopic amount of the horizontal driving mechanism is adjusted for the pressing operation.

[0025] The telescopic driving column is arranged, so that the working angle of the pressing plate can be flexibly adjusted, and the working height of the pressing plate is adjusted through the driving guide rail, so that the pressing operation is realized in cooperation with the guide plate.

[0026] In the embodiment, the pressing mechanism 3, the horizontal driving mechanism 27, and the telescopic driving column 28 are any one of a hydraulic telescopic rod, a pneumatic telescopic rod, and an electric telescopic rod.

[0027] The pressing plate 23 is a circular arc plate structure coaxially distributed with the rack 21, the upper end surface of the pressing plate 23 is provided with a guide sliding groove 231, the guide sliding groove 231 is slidably connected with the front end surface of the telescopic driving column 28 through a sliding block 26, each pressing plate 23 is distributed in a plane perpendicular to the axis of the rack 21 and uniformly surrounds the axis of the rack 21, and the adjacent two pressing plates 23 are connected with each other through the elastic connecting belt 10 and form a closed ring structure coaxially distributed with the rack 21.

[0028] The guide sliding groove can flexibly adjust the relative position between the pressing plate and the telescopic driving column when the telescopic driving column drives the pressing plate to overturn, so as to drive the pressing plate to overturn and improve the overturning angle range.

[0029] The pressing plate 23 is a circular arc plate structure coaxially distributed with the rack 21, the upper end surface of the pressing plate 23 is provided with a guide sliding groove 231, the guide sliding groove 231 is slidably connected with the front end surface of the telescopic driving column 28 through a sliding block 26, each pressing plate 23 is distributed in a plane perpendicular to the axis of the rack 21 and uniformly surrounds the axis of the rack 21, and the adjacent two pressing plates 23 are connected with each other through the elastic connecting belt 10 and form a closed ring structure coaxially distributed with the rack 21.

[0030] The guide sliding groove can flexibly adjust the relative position between the pressing plate and the telescopic driving column when the telescopic driving column drives the pressing plate to overturn, so as to drive the pressing plate to overturn and improve the overturning angle range.

[0031] In the embodiment, the pressing mechanism 3 is further hingedly connected with the upper end surface of the rack 21, and the pressure sensor 5 is located between the hinge and the upper end surface of the rack 21, the upper end surface of the rack 21 is provided with an adjusting groove 211 corresponding to the pressing mechanism 3, the adjusting groove 211 is distributed along the diameter direction of the rack 21, the axis of each adjusting groove 211 intersects with the axis of the rack 21, an installation block 212 is arranged in the adjusting groove 211 and slidably connected with the installation block 212, the installation block 212 is a block structure with a rectangular cross section, the upper end surface of the installation block 212 is connected with the pressure sensor 5, the pressure sensor 5 is hingedly connected with the pressing mechanism 3 through a hinge, the front end surface and the rear end surface of the installation block 212 are provided with a spring 213, the spring 213 is embedded in the adjusting groove 211 and is distributed parallel to the axis of the adjusting groove 211, and the two ends of the spring 213 are connected with the end surface of the installation block 212 and the end surface of the adjusting groove 211, respectively.

[0032] The adjusting groove and the spring in the adjusting groove can assist the turnover mechanism to flexibly adjust the working angle of the pressing mechanism within a certain range, and effectively adjust the actual pressing driving force by adjusting the working angle of the pressing mechanism and the stress point of the pressing mechanism driving force, and improve the uniformity of the stress of the pressing mechanism during operation by synchronously operating the plurality of pressing mechanisms.

[0033] In the embodiment, the driving circuit 9 is a circuit system based on a programmable controller, and the driving circuit 9 further comprises a control interface 11 shared by any one or several of a display, a key, a potentiometer, and a keyboard.

[0034] In the embodiment, first, the bearing keel, the pressing mechanism, the pressing mechanism, the turnover mechanism, the pressure sensor, the irradiation heating mechanism, the non-contact temperature sensor, the annular driving guide rail, and the driving circuit are assembled to obtain a finished flanging device, then the bearing keel is used to connect the finished flanging device and an external pipe component positioning and conveying device, and the pressing mechanism is coaxially distributed with the pipe component to be processed, and finally the driving circuit is electrically connected with an external control system or power supply system, so that the equipment assembly is completed.

[0035] When the bending and flanging operation is performed, the non-contact temperature sensor is used to detect the temperature of the PFA material lining layer outside the pipe end face to be processed, when the temperature of the PFA material lining layer is low, the irradiation heating mechanism is driven to heat the PFA material lining layer, so that the temperature of the PFA material lining layer is within the optimal plasticizing temperature range, and during the operation of the irradiation heating mechanism and the non-contact temperature sensor, the annular driving guide rail drives the irradiation heating mechanism and the non-contact temperature sensor to rotate at a uniform speed around the PFA material lining layer, so as to improve the temperature detection accuracy and effectively improve the uniformity of the heating operation and the temperature rise and preservation of the PFA material lining layer.

[0036] After the temperature of the PFA material lining layer reaches the processing requirement, the pressing mechanism is driven to drive the pressing mechanism, so that the lower end face of the pressing mechanism is inserted into the pipe to be processed, and at the same time that the pressing mechanism is inserted into the pipe to be processed, the horizontal driving mechanisms of the pressing mechanism are synchronously driven to operate, the positions of the guide plates are adjusted by the horizontal driving mechanisms, the included angle between the guide plate axes and the rack axis is increased, and the overall axis section of the pressing mechanism is formed into a circular truncated cone structure with an isosceles trapezoidal shape, so as to drive the PFA material lining layer to be turned outward by the guide plates and realize the preliminary turning operation of the PFA material lining layer.

[0037] After the initial turning operation is completed, the pressing plates and telescopic driving columns are again driven synchronously by the driving guide rails to be pressed down, and the telescopic driving columns are synchronously driven to extend during the pressing process. During the extension operation of the telescopic driving columns, the pressing plates are driven to turn, so that the included angle between the lower end surface of the pressing plate and the rack increases from 0° to 90°, and the pressing plate further turns and presses the PFA material lining layer during the increasing process. Finally, the turned PFA material lining layer is pressed on the surface of the flange at the pipe end face, and the heating and pressure state is maintained, then the PFA material lining layer is gradually cooled to room temperature, and the shaping operation is completed. After the shaping operation is completed, the guide plates and pressing plates of the pressing mechanism are reset, and the pressing mechanism is extracted from the pipe, and the heating operation is completed.

[0038] The new device has simple structure, high integration and modularization degree, and good universality. On the one hand, it can effectively meet the collaborative operation with various devices to realize efficient bending and turning forming operation of the PFA material lining layer, thereby greatly improving the flexibility, universality and environmental adaptability of the device; on the other hand, it can effectively meet the needs of bending and turning forming operation of PFA material lining layer of various pipe diameters, and effectively overcome the defects of uneven thickness, cracks and even breakage of PFA material lining layer at the bending part during the bending of PFA material lining layer by traditional devices, thereby effectively improving the stability and reliability of the connection and positioning between the PFA material lining and the pipe and the working efficiency of the PFA material lining forming operation.

[0039] The basic principles and main features of the new device and the advantages of the new device are shown and described. It should be understood by those skilled in the art that the new device is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the new device. Without departing from the spirit and scope of the new device, various changes and improvements can be made to the new device, and these changes and improvements all fall within the scope of the claimed new device. The scope of protection of the new device is defined by the appended claims and their equivalents.

Claims

1. A PFA material pipe lining flange forming mechanism characterized by: The PFA material pipe lining turn-up shaping mechanism includes a bearing keel, a pressing mechanism, a pressing mechanism, a turnover mechanism, a pressure sensor, an irradiation heating mechanism, a non-contact temperature sensor, an annular drive guide rail and a drive circuit, the bearing keel is a circular truncated cone frame structure, the bearing keel is provided with a shaping cavity coaxially distributed therein, at least two turnover structures are arranged on the corresponding upper end surface of the bearing keel, each turnover mechanism is connected with a pressing mechanism, the lower half of the pressing mechanism is located in the shaping cavity and is connected with the upper end surface of the pressing mechanism through the pressure sensor, the turnover mechanisms are uniformly distributed around the axis of the shaping cavity, the axis of the pressing mechanism intersects with the axis of the shaping cavity, the pressing mechanism is embedded in the shaping cavity and is coaxially distributed with the shaping cavity, the irradiation heating mechanism and the non-contact temperature sensor are at least two, each irradiation heating mechanism and non-contact temperature sensor is located in the shaping cavity and is slidably connected with the inner side surface of the bottom of the shaping cavity through the annular drive guide rail, the irradiation heating mechanisms and non-contact temperature sensors are uniformly distributed around the axis of the shaping cavity, and the non-contact temperature sensors are located between the adjacent two irradiation heating mechanisms, the drive circuit is connected with the outer side surface of the bearing keel and is electrically connected with the pressing mechanism, the pressing mechanism, the turnover mechanism, the pressure sensor, the irradiation heating mechanism, the non-contact temperature sensor and the annular drive guide rail.

2. The PFA material pipe lining turn-up shaping mechanism according to claim 1, characterized in that: The pressing mechanism includes a rack, a guide plate, a pressing plate, a drive guide rail, a temperature sensor, a pressure sensor, a horizontal drive mechanism, a telescopic drive column and an inclination sensor, wherein the rack is a hollow cylindrical frame structure, the upper end surface of the rack is connected with the pressing mechanism, the guide plate is at least four, is uniformly distributed around the axis of the rack and is an arc plate structure coaxially distributed with the rack, the upper half and the lower half of the guide plate are connected with the rack through a horizontal drive mechanism, the axis of the horizontal drive mechanism intersects with the axis of the rack and the guide plate and is vertically distributed with the axis of the rack, the front end surface of the horizontal drive mechanism is hinged with the rear end surface of the guide plate, the axis of the guide plate and the axis of the rack form an angle of 0°-60°, the outer side surface of the rack between the adjacent two guide plates is connected with a drive guide rail, the axis of the drive guide rail is parallelly distributed with the axis of the rack, the drive guide rail is connected with two telescopic drive columns through two sliders, the front end surface of one of the telescopic drive columns is hinged with the rear end surface of the pressing plate, the front end surface of the other telescopic drive column is hinged with the upper end surface of the pressing plate, the lower end surface of the pressing plate forms an angle of 0°-90° with the axis of the rack, the axis of the telescopic drive column forms an angle of 0°-90° with the axis of the drive guide rail, the pressure sensor is arranged at the connection position of the horizontal drive mechanism and the guide plate and at the connection position of the telescopic drive column and the upper end surface of the pressing plate, the rear end surface of the guide plate and the upper end surface of the pressing plate are respectively connected with a temperature sensor and an inclination sensor, and the temperature sensor, the pressure sensor, the horizontal drive mechanism, the telescopic drive column and the inclination sensor are electrically connected with the drive circuit.

3. The PFA material pipe lining turn-up shaping mechanism according to claim 1 or 2, characterized in that: The pressing mechanism, the horizontal drive mechanism and the telescopic drive column are any one of a hydraulic telescopic rod, an air pressure telescopic rod and an electric telescopic rod.

4. The PFA material pipe lining turn-up forming mechanism according to claim 2, characterized in that: The cross section of the pressing plate is rectangular, and the pressing plate is in the form of a circular arc plate coaxial with the frame. The upper end surface of the pressing plate is provided with a guide sliding groove, and the guide sliding groove is connected with the front end surface of the telescopic driving column through a sliding block. Meanwhile, each pressing plate is distributed in a plane perpendicular to the axis of the frame, and surrounds the axis of the frame. The adjacent two pressing plates are connected with each other through an elastic connecting belt, and form a closed ring structure coaxial with the frame.

5. The PFA material pipe lining turn-up forming mechanism according to claim 2 or 4, characterized in that: The front end surface of the pressing plate is provided with at least two connecting sliding grooves perpendicular to the lower end surface of the pressing plate, and the connecting sliding grooves are connected with a shaping plate. The cross section of the shaping plate is rectangular, and the shaping plate is in the form of a circular arc plate coaxial with the pressing plate. The plate surface of the shaping plate is perpendicular to the lower surface of the pressing plate, and the pressing plate and the shaping plate form a groove structure in the form of "L".

6. The PFA material pipe lining turn-up forming mechanism according to claim 1 or 2, characterized in that: The pressing mechanism is connected with the upper end surface of the frame through a hinge, and the pressure sensor is located between the hinge and the upper end surface of the frame. Meanwhile, the upper end surface of the frame is provided with an adjusting groove corresponding to the pressing mechanism. The adjusting groove is distributed along the diameter direction of the frame, and the axis of each adjusting groove intersects with the axis of the frame. An installation block is arranged in the adjusting groove and is connected with the installation block through sliding. The cross section of the installation block is rectangular, and the upper end surface of the installation block is connected with the pressure sensor. The pressure sensor is connected with the pressing mechanism through a hinge. Meanwhile, the front end surface and the rear end surface of the installation block are provided with a spring. The spring is embedded in the adjusting groove and is distributed parallel to the axis of the adjusting groove. The two ends of the spring are connected with the end surface of the installation block and the end surface of the adjusting groove, respectively.

7. The PFA material pipe lining turn-up forming mechanism according to claim 1, characterized in that: The driving circuit is a circuit system based on a programmable controller. Meanwhile, the driving circuit is provided with a control interface shared by any one or several of a display, a key, a potentiometer and a keyboard.

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