Fluorine plastic pipe expanding device

Abstract

The utility model relates to the technical field of fluorine plastic pipe processing, in particular to a fluorine plastic pipe expanding device which comprises a base, a driving device and an abutting joint, a plurality of balls are movably embedded in the outer surface of the abutting joint, six contact plates are arranged on the base, a pre-pressing assembly connected with the six contact plates is arranged on the base, and the driving device is arranged on the base. According to the fluorine plastic pipe expanding device, the multiple balls are arranged on the end face of the abutting head, when the abutting head moves, the balls make rolling contact with the rollers, the friction resistance at the inclined plate can be effectively reduced, the friction force difference between all components is reduced, and therefore the number of the rollers is reduced, and the service life of the fluorine plastic pipe expanding device is prolonged. In the moving process of the contact plate, all the components can act in a more coordinated and consistent mode, and the synchronism and stability of movement are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of fluoroplastic pipe processing technology, specifically to a fluoroplastic pipe expansion device. Background Technology

[0002] Fluoroplastic pipe expanding devices are indispensable tools in the processing of fluoroplastic pipes. These devices enlarge the ends of fluoroplastic pipes to a specific size for connection with fittings such as flared connectors and valves. The expanding device ensures uniform expansion of the pipe ends, guaranteeing a tight seal and stability at the connection point and preventing fluid leakage. However, existing fluoroplastic pipe expanding devices only subject the fluoroplastic pipe to vertical tensile force during operation. This unidirectional and uneven force distribution prevents the pipe from being evenly extended during expansion, affecting the quality of the expansion process.

[0003] A search revealed that patent publication number CN222522020U discloses a fluoroplastic tube expanding device. When the simultaneously installed abutment advances forward, it can apply synchronous and balanced extrusion force to six expanding seats, causing the six expanding seats to move outward at the same speed. Due to the annular arrangement of the six expanding seats, they can simultaneously apply tensile force to the fluoroplastic tube from six different directions, effectively avoiding the problem of uneven local stress on the tube and making the fluoroplastic tube more uniformly stressed during the expanding process.

[0004] However, in actual use, we have found that although six expansion seats are used, the expansion is not synchronized due to the difference in frictional resistance between the expansion seats, which may result in uneven pipe wall thickness in actual production. Since the spring acts directly on the expansion seat, it is continuously heated in the high-temperature environment required for fluoroplastic processing, and the physical properties of the material will change, and the extrusion coefficient will also fluctuate. Under such conditions for a long time, the elasticity of the spring will gradually decrease, affecting the stability and reliability of the expansion device. Therefore, we propose a fluoroplastic pipe expansion device. Utility Model Content

[0005] One of the technical problems to be solved in this application is: how to design a fluoroplastic tube expansion device that enables better synchronization of multiple expansion seats.

[0006] To solve the above-mentioned technical problems, this application provides a fluoroplastic tube expansion device, including a base, a driving device and an abutment joint. The outer surface of the abutment joint is movably embedded with a plurality of balls. The base is provided with six contact plates and a pre-compression assembly connected to the six contact plates. The pre-compression assembly is provided with a plurality of rollers movably connected to the plurality of balls.

[0007] In some embodiments, the pre-compression assembly includes a base with two support frames on top, a collar between the two support frames, and an inclined plate movably disposed inside the collar and connected to a contact plate and a roller.

[0008] In some embodiments, a spline groove is provided on the outer side of the collar, and a spline shaft is provided on the inner side of the collar, which is movably connected to the inner wall of the spline groove. The end of the spline shaft is located on the outer side of the inclined plate, and a limit plate is provided on the end of the spline shaft.

[0009] In some embodiments, the inner wall of the collar is provided with a threaded groove concentric with the spline groove, and a threaded disc threaded to the inner wall of the threaded groove is sleeved on the outer side of the spline shaft, and a spring is provided between the threaded disc and the inclined plate.

[0010] In some embodiments, the outer side of the collar is provided with an arc-shaped groove that communicates with the threaded groove, and the end of the threaded disc is provided with two circular grooves that correspond to the ends of the arc-shaped groove.

[0011] In some embodiments, the inclined surface of the inclined plate is provided with a square groove, and the inner wall of the square groove is provided with a shaft that is movably connected to the inside of the roller.

[0012] In some embodiments, the outer surface of the abutment is provided with four back plates for movably embedding a plurality of balls.

[0013] This utility model has at least the following beneficial effects:

[0014] Multiple balls are arranged on the end face of the abutment. When the abutment moves, the balls and the rollers form rolling contact, which can effectively reduce the frictional resistance at the inclined plate and reduce the frictional differences between the components. Therefore, during the movement of the contact plate, the components can move more coordinatedly and significantly improve the synchronization and stability of the movement.

[0015] By adding a back ridge plate to the end face of the connector and arranging the ball bearings on it in an orderly manner, the four inclined plates can achieve a small expansion in the early stage of pipe expansion, which is suitable for the expansion needs of square fluoroplastic pipes and avoids damage to the pipe material due to excessive expansion. In addition, the number and specifications of the back ridge plate can be flexibly adjusted according to the actual processing requirements of different models of fluoroplastic pipes, which significantly improves the equipment's adaptability to diverse pipe materials and effectively reduces the limitations in the process of use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the drive device, the abutment, and the pre-compression assembly of this utility model;

[0018] Figure 3 This is a cross-sectional structural diagram of the collar of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the inclined plate, contact plate, limiting plate and threaded plate of this utility model;

[0020] Figure 5 This is an exploded structural diagram of the inclined plate, roller, and shaft of this utility model;

[0021] Figure 6 This is a schematic diagram of the structure of the abutment, back plate, and ball bearings of this utility model.

[0022] In the diagram: 1. Base; 2. Drive unit; 3. Ball bearing; 4. Abutment joint; 5. Contact plate; 6. Preload assembly; 61. Support frame; 62. Collar; 63. Inclined plate; 64. Limiting plate; 65. Arc groove; 66. Spline groove; 67. Splined shaft; 68. Threaded groove; 69. Threaded disc; 610. Spring; 611. Circular groove; 7. Roller; 8. Square groove; 9. Shaft; 10. Back ridge plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1: Please refer to Figure 1-5 This utility model provides a technical solution: a fluoroplastic tube expansion device, including a base 1, a driving device 2, and an abutment 4. Multiple balls 3 are movably embedded in the outer surface of the abutment 4. Six contact plates 5 are provided on the base 1, and a pre-pressing component 6 connected to the six contact plates 5 is provided on the base 1. Multiple rollers 7 are movably connected to the multiple balls 3 on the pre-pressing component 6. The abutment 4 is conical in shape, so that during contact, the ball 3 first contacts the inclined surface and then transitions to the outer side of the cylinder. The movement of the balls 3 is directly limited to the outer surface of the abutment 4, but the balls 3 can rotate freely on their outer surface. The rollers 7 can rotate around their axis. When the balls 3 and rollers 7 contact, friction is reduced, allowing the contact plates 5 to move synchronously. Furthermore, the contact plates 5 can fit various different fluoroplastic tubes, and are designed in an arc shape.

[0025] The pre-compression assembly 6 includes two support frames 61 on the top of the base 1, and a collar 62 between the two support frames 61. An inclined plate 63 connected to the contact plate 5 and the roller 7 is movably arranged inside the collar 62. The collar 62 can make multiple inclined plates 63 be in the same state, and multiple rollers 7 are arranged on the inclined surface of each inclined plate 63. In this way, the ball 3 can not contact the inclined plate 63, thereby reducing friction.

[0026] A spline groove 66 is provided on the outer side of the collar 62, and a spline shaft 67 is movably connected to the inner wall of the spline groove 66 on the inner side of the collar 62. The end of the spline shaft 67 is located on the outer side of the inclined plate 63, and a limit plate 64 is provided at the end of the spline shaft 67. The arrangement of the spline shaft 67 and the spline groove 66 prevents the inclined plate 63 from rotating when it moves up and down, so that the inclined plate 63 moves according to the set trajectory. The limit plate 64 can prevent the spline shaft 67 from directly disengaging from the spline groove 66, so that the limit plate 64 can move and contact the outer surface of the collar 62.

[0027] The inner wall of the collar 62 has a threaded groove 68 concentric with the spline groove 66. The outer side of the spline shaft 67 is fitted with a threaded disc 69 threaded to the inner wall of the threaded groove 68. A spring 610 is provided between the threaded disc 69 and the inclined plate 63. The threaded disc 69 does not contact the outer surface of the spline shaft 67, and the threaded disc 69 can rotate inside the threaded groove 68. In this way, different compressive forces are applied to each inclined plate 63. By adjusting the spring 610, the spring 610 can be adjusted to the same compressive force after a long period of high temperature. In order to attach to each inclined plate 63, different preloads are added so that each spring 610 is under the same compressive force.

[0028] The outer side of the collar 62 has an arc-shaped groove 65 that communicates with the threaded groove 68. The end of the threaded disc 69 has two circular grooves 611 that correspond to the end of the arc-shaped groove 65. The arc-shaped groove 65 is semi-circular in shape, so no matter how the two circular grooves 611 are rotated, one of the circular grooves 611 will always correspond to the arc-shaped groove 65. Thus, a cylindrical tool can be inserted into the arc-shaped groove 65 and the circular groove 611 and rotated to make the threaded disc 69 rotate, thereby adjusting the position of the threaded disc 69 in the threaded groove 68.

[0029] The inclined plate 63 has a square groove 8 on its inclined surface. The inner wall of the square groove 8 is provided with a shaft 9 that is movably connected to the inside of the roller 7. By setting the square groove 8, the roller 7 and the shaft 9 can be set inside it, and the outer surface of the roller 7 will exceed the inclined surface of the inclined plate 63. In this way, the ball 3 will contact the roller 7 but will not contact the inclined surface of the inclined plate 63.

[0030] When using this device, first start the drive device 2 to drive the abutment 4 to move, so that the abutment 4 drives the multiple balls 3 on the outer surface to move. The multiple balls 3 will first contact the roller 7, so that the roller 7 drives the shaft 9 to move inside the square groove 8, thereby driving the inclined plate 63 to move. The top of the inclined plate 63 is provided with a spline shaft 67, so the spline shaft 67 will slide inside the spline groove 66. Simultaneously, the inclined plate 63 compresses the spring 610. At this time, the multiple inclined plates 63 will drive the contact plate 5 at the end to expand the fluoroplastic tube. After completion, it will return to its original position under the action of the spring 610. After multiple uses, in order to avoid the spring 610's compressive force changing at high temperature, a cylindrical tool can be inserted into the round groove 611 and slide on the inner wall of the arc groove 65 to drive the threaded disc 69 to move, thereby changing the compressive force of the spring 610. At this time, the compressive force of the spring 610 can be detected by the equipment to complete the adjustment.

[0031] Example 2: Please refer to Figure 6 This utility model provides a technical solution: the outer surface of the abutment 4 is provided with four back plates 10 for movably embedding multiple balls 3. The back plates 10 change the synchronous contact of multiple inclined plates 63 to contact the back plates 10 first. In this way, the four back plates 10 with a 90-degree angle between them can expand the square fluoroplastic tube. Alternatively, two back plates 10 with a 180-degree angle between them can be set to accommodate elliptical fluoroplastic tubes. These three are the most common shapes on the market, thereby reducing the limitations of use and increasing the adaptability.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A fluoroplastic tube expansion device, comprising a base (1), a driving device (2), and an abutment joint (4), characterized in that: The outer surface of the abutment (4) is movably inlaid with a plurality of balls (3), the base (1) is provided with six contact plates (5), the base (1) is provided with a pre-pressing component (6) connected to the six contact plates (5), and the pre-pressing component (6) is provided with a plurality of rollers (7) movably connected to the plurality of balls (3).

2. The fluoroplastic tube expander according to claim 1, characterized in that: The pre-compression assembly (6) includes two support frames (61) on the top of the base (1), and a collar (62) is provided between the two support frames (61). The collar (62) has an inclined plate (63) that is movably arranged inside and connected to the contact plate (5) and the roller (7).

3. The fluoroplastic tube expander according to claim 2, characterized in that: The outer side of the collar (62) is provided with a spline groove (66), and the inner side of the collar (62) is provided with a spline shaft (67) movably connected to the inner wall of the spline groove (66). The end of the spline shaft (67) is provided on the outer side of the inclined plate (63), and the end of the spline shaft (67) is provided with a limit plate (64).

4. The fluoroplastic tube expander according to claim 3, characterized in that: The inner wall of the collar (62) is provided with a threaded groove (68) that is concentric with the spline groove (66). The outer side of the spline shaft (67) is provided with a threaded disc (69) that is threaded to the inner wall of the threaded groove (68). A spring (610) is provided between the threaded disc (69) and the inclined plate (63).

5. The fluoroplastic tube expander according to claim 4, characterized in that: The outer side of the collar (62) is provided with an arc-shaped groove (65) that communicates with the threaded groove (68), and the end of the threaded disc (69) is provided with two circular grooves (611) that correspond to the end of the arc-shaped groove (65).

6. The fluoroplastic tube expander according to claim 5, characterized in that: The inclined plate (63) has a square groove (8) on its inclined surface, and the inner wall of the square groove (8) is provided with a shaft (9) that is movably connected to the inside of the roller (7).

7. The fluoroplastic tube expander according to claim 1, characterized in that: The outer surface of the abutment (4) is provided with four back plates (10) for movably embedding multiple balls (3).

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