Clamping mechanism for welding PFA (Polyfluoroalkoxy) pipe

Abstract

The utility model discloses a clamping mechanism for PFA pipe welding, and relates to the technical field of PFA pipe welding, the clamping mechanism comprises an upper clamping plate and a lower clamping plate, the upper clamping plate and the lower clamping plate are rotatably connected through a hinge and can rotate to a mutual attaching state, the opposite sides of the upper clamping plate and the lower clamping plate are provided with arc-shaped grooves, and when the upper clamping plate and the lower clamping plate are attached to each other, the arc-shaped grooves are matched with the arc-shaped grooves. The two arc-shaped grooves jointly define a cylindrical hole where a PFA pipe is inserted, semicircular rings A are arranged in the upper clamping plate and the lower clamping plate correspondingly, the two sides of each semicircular ring A are rotationally connected with the interior of the upper clamping plate or the interior of the lower clamping plate through short rods correspondingly, one end of each short rod is fixedly connected with the corresponding semicircular ring A, and the other end of each short rod is fixedly connected with the corresponding semicircular ring A. Through the nesting design of the semicircular ring A and the semicircular ring B and the characteristic that the semicircular ring A and the semicircular ring B are rotationally connected with the clamping plates through the short rods and the rotating rods respectively, the clamping mechanism can flexibly adjust the size of the internal space to adapt to PFA pipes with different diameters, and universality and practicability of the clamping mechanism are enhanced.

Description

Technical Field

[0001] This utility model relates to the field of PFA pipe welding technology, and in particular to a clamping mechanism for PFA pipe welding. Background Technology

[0002] In the PFA (polytetrafluoroethylene) tube welding process, the stability and precision of the clamping mechanism directly determine the welding quality. Existing clamping mechanisms are often only applicable to PFA tubes of a specific diameter, lacking flexibility to adapt to different tube diameters. Different specifications of PFA tubes require a complete set of clamps (φ10 / φ20 / φ30 require 3 configurations), increasing production costs and changeover time, which limits the scope of application of the clamping mechanism.

[0003] Pneumatic and hydraulic clamping mechanisms rely on external power sources to drive pistons or cylinders. Although they can achieve rapid opening and closing, they suffer from problems such as complex structure (requiring matching air pumps / hydraulic pumps), high cost (precision hydraulic valve groups cost over ten thousand yuan), and short lifespan of seals (rubber rings are prone to aging at high temperatures). Utility Model Content

[0004] The purpose of this invention is to provide a clamping mechanism for PFA pipe welding, which solves the problem that existing clamping mechanisms are difficult to adapt to PFA pipes of different sizes and specifications and require frequent clamp replacements.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: A clamping mechanism for welding PFA tubes includes an upper clamping plate and a lower clamping plate. The upper clamping plate and the lower clamping plate are rotatably connected by a hinge and can rotate to a mutually fitted state. An arc-shaped groove is provided on the opposite side of the upper clamping plate and the lower clamping plate. When the two are fitted together, the two arc-shaped grooves together form a cylindrical hole for inserting the PFA tube. A semi-circular ring A is provided inside the upper clamping plate and the lower clamping plate. The two sides of the semi-circular ring A are rotatably connected to the inside of the upper clamping plate or the lower clamping plate by short rods. One end of the short rod is fixedly connected to the semi-circular ring A. When the upper clamping plate and the lower clamping plate are fitted together, the two semi-circular rings A can rotate to a mutually fitted state to form a first complete ring coaxial with the cylindrical hole, or rotate to be completely housed inside the upper clamping plate or the lower clamping plate without affecting the use of the arc-shaped grooves.

[0006] Preferably, each semicircular ring A has a semicircular ring B inside. The semicircular ring B is rotatably connected to the semicircular ring A through a rotating rod. The rotating rod is fixedly connected inside the semicircular ring B. The two ends of the rotating rod are rotatably connected to the corresponding two side walls of the semicircular ring A. When the upper and lower clamping plates are in contact and the two semicircular rings A are in contact, the two semicircular rings B can rotate to a mutually contacting state to form a second complete ring coaxial with the first complete ring, or rotate to be completely housed between the semicircular ring A and the upper or lower clamping plate without affecting the use of the semicircular ring A.

[0007] Preferably, two spaced magnets are provided inside the upper clamping plate, the lower clamping plate, and the semicircular ring A. A metal layer is provided on the outer side of the semicircular ring A and the outer side of the semicircular ring B. When the semicircular rings A and B are rotated to adjust a specific angle, the interaction between the magnets and the metal layer can quickly achieve positioning and maintain stability, reducing the time for manual adjustment and improving the welding efficiency.

[0008] Preferably, both sides of the upper and lower clamping plates are provided with arc-shaped slides. When semicircular ring A and semicircular ring B rotate synchronously, the short rod can slide into the arc-shaped slide and move smoothly along the arc-shaped slide, ensuring that the two remain synchronized during rotation and avoiding misalignment or jamming.

[0009] Preferably, the lower clamping plate is symmetrically fixedly connected with sliding cylinders inside, which makes it easier for the lower clamping plate to be assembled on the guide rail.

[0010] Preferably, a buckle is installed between one corner of the side wall of the upper clamping plate and the lower clamping plate, which can be easily released by simple operation, making it convenient to open and close the clamping mechanism.

[0011] Preferably, the buckle includes a locking tongue and a locking groove. The locking tongue is fixedly connected to the side wall of the upper clamping plate, and the locking groove is fixedly connected to the side wall of the lower clamping plate. The locking tongue and the corresponding locking groove cooperate with each other. When the two cooperate, the upper clamping plate and the lower clamping plate can be quickly locked, ensuring the stability of the clamping mechanism during the welding process and preventing safety accidents caused by accidental loosening.

[0012] Preferably, knobs are fixedly connected to one end of the short rod and both ends of the rotating rod, which makes it easier to control the rotation of semicircular ring A and semicircular ring B by rotating the short rod and the rotating rod.

[0013] Compared with the prior art, the advantages of this utility model are as follows:

[0014] 1. This utility model, through the nested design of semicircular ring A and semicircular ring B, and their rotatable connection to the clamping plate via short rods and rotating rods respectively, enables the clamping mechanism to flexibly adjust the internal space size to adapt to PFA tubes of different diameters, thereby enhancing its versatility and practicality.

[0015] 2. This invention, through the configuration of magnets and metal layers, can assist in the rapid positioning and fixing of semicircular rings A and B, reducing manual adjustment time and thus improving the efficiency of welding operations. Furthermore, the quick-locking function of the snap-fit ​​also helps to shorten preparation time. Attached Figure Description

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

[0017] Figure 2This is a schematic diagram of the upper and lower clamping plates of this utility model.

[0018] Figure 3 This is a schematic diagram of the structure of the semicircular ring A after rotation according to this utility model.

[0019] Figure 4 This is a schematic diagram of the structure of the semicircular ring B after rotation according to this utility model.

[0020] Figure 5 This is a schematic diagram of the semi-circular ring A structure of this utility model.

[0021] Reference numerals: 1. Upper clamping plate; 2. Lower clamping plate; 3. Arc groove; 4. Semicircular ring A; 5. Short rod; 6. Semicircular ring B; 7. Rotating rod; 8. Magnet; 9. Metal layer; 10. Arc slide; 11. Slide cylinder; 12. Buckle; 13. Locking tongue; 14. Locking groove; 15. Knob. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figures 1 to 5 This embodiment provides a clamping mechanism for welding PFA tubes, including an upper clamping plate 1 and a lower clamping plate 2. The upper clamping plate 1 and the lower clamping plate 2 are rotatably connected by a hinge and can rotate to a mutually fitted state. An arc-shaped groove 3 is provided on the opposite side of the upper clamping plate 1 and the lower clamping plate 2. When the two are fitted together, the two arc-shaped grooves 3 together form a cylindrical hole for inserting the PFA tube. A semi-circular ring A4 is provided inside the upper clamping plate 1 and the lower clamping plate 2. The two sides of the semi-circular ring A4 are rotatably connected to the inside of the upper clamping plate 1 or the lower clamping plate 2 by short rods 5 respectively. One end of the short rods 5 is fixedly connected to the semi-circular ring A4. When the upper clamping plate 1 and the lower clamping plate 2 are fitted together, the two semi-circular rings A4 can rotate to a mutually fitted state to form a first complete ring coaxial with the cylindrical hole, or rotate to be completely housed inside the upper clamping plate 1 or the lower clamping plate 2 without affecting the use of the arc-shaped groove 3.

[0024] The upper clamping plate 1 and the lower clamping plate 2 are connected by a hinge. The operator manually rotates the two plates around the hinge axis to the closed state. At this time, the arc-shaped grooves 3 on the inner side of the two plates are precisely aligned to form a cylindrical hole that matches the outer diameter of the PFA pipe, thus achieving the basic positioning of the pipe. When it is necessary to clamp and fix a medium-sized PFA pipe, the short rod 5 is rotated to drive the semi-circular ring A4 to rotate out from the inside of the clamping plate. The semi-circular ring A4 of the upper clamping plate 1 and the lower clamping plate 2 rotate synchronously to the closed position, forming the first complete ring coaxial with the pipe, thus achieving the adaptation of the PFA pipe diameter.

[0025] The interior of each semicircular ring A4 is provided with a semicircular ring B6. The semicircular ring B6 is rotatably connected to the semicircular ring A4 through a rotating rod 7. The rotating rod 7 is fixedly connected inside the semicircular ring B6. The two ends of the rotating rod 7 are rotatably connected to the corresponding two side walls of the semicircular ring A4. When the upper clamping plate 1 and the lower clamping plate 2 are in contact and the two semicircular rings A4 are in contact, the two semicircular rings B6 can rotate to a state of mutual contact to form a second complete ring coaxial with the first complete ring, or rotate to be completely stored between the semicircular ring A4 and the upper clamping plate 1 or the lower clamping plate 2 without affecting the use of the semicircular ring A4.

[0026] After the first ring is formed, the rotating rod 7 is further rotated to drive the semi-circular ring B6 to rotate out from inside the semi-circular ring A4. The two semi-circular rings B6 close synchronously to form a second complete ring, which can be further adapted to the clamping and positioning of small-diameter PFA pipes.

[0027] Two magnets 8 are provided at intervals inside the upper clamping plate 1, the lower clamping plate 2, and the semicircular ring A4. A metal layer 9 is provided on the outer side of the semicircular ring A4 and the outer side of the semicircular ring B6. When the semicircular ring A4 or B is rotated into position, the magnets 8 will attract the metal layer 9, which will play a role in positioning and fixing.

[0028] Both sides of the upper clamping plate 1 and the lower clamping plate 2 are provided with arc-shaped slide rails 10. When the semicircular ring A4 rotates, it will drive the semicircular ring B6 to rotate synchronously. The arc-shaped slide rails 10 can serve as the sliding path of the short rod 5 when the semicircular ring B6 rotates.

[0029] The lower clamping plate 2 is symmetrically fixedly connected with a sliding cylinder 11, which makes it easier to assemble the lower clamping plate 2 onto the guide rail and facilitates the assembly of the clamping mechanism.

[0030] A buckle 12 is installed between one corner of the side wall of the upper clamping plate 1 and the lower clamping plate 2. The buckle 12 can be operated with one hand, which facilitates the quick opening and closing of the clamping mechanism and enables the upper clamping plate 1 and the lower clamping plate 2 to be quickly locked.

[0031] The buckle 12 includes a locking tongue 13 and a locking groove 14. The locking tongue 13 is fixedly connected to the side wall of the upper clamping plate 1, and the locking groove 14 is fixedly connected to the side wall of the lower clamping plate 2. The locking tongue 13 cooperates with the corresponding locking groove 14 to ensure the stable alignment of the upper clamping plate 1 and the lower clamping plate 2 in the locked state.

[0032] Knobs 15 are fixedly connected to one end of the short rod 5 and both ends of the rotating rod 7, allowing the operator to more easily rotate the short rod 5 and the rotating rod 7 to control the rotation adjustment of the semicircular ring A4 and the semicircular ring B6.

[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, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A clamping mechanism for welding PFA tubes, comprising an upper clamping plate (1) and a lower clamping plate (2), wherein the upper clamping plate (1) and the lower clamping plate (2) are rotatably connected by a hinge and can rotate to a mutually fitted state, wherein an arc-shaped groove (3) is provided on one side of each of the upper clamping plate (1) and the lower clamping plate (2), and when the two are fitted together, the two arc-shaped grooves (3) together form a cylindrical hole for inserting a PFA tube, characterized in that, Both the upper clamping plate (1) and the lower clamping plate (2) are provided with semi-circular rings A (4). The two sides of the semi-circular rings A (4) are rotatably connected to the interior of the upper clamping plate (1) or the lower clamping plate (2) by short rods (5). One end of the short rods (5) is fixedly connected to the semi-circular rings A (4). When the upper clamping plate (1) and the lower clamping plate (2) are in contact, the two semi-circular rings A (4) can rotate to a state of mutual contact, forming a first complete ring coaxial with the cylindrical hole, or rotate to be completely housed inside the upper clamping plate (1) or the lower clamping plate (2) without affecting the use of the arc groove (3).

2. The clamping mechanism for PFA pipe welding according to claim 1, characterized in that, The interior of each semicircular ring A (4) is provided with a semicircular ring B (6). The semicircular ring B (6) is rotatably connected to the semicircular ring A (4) through a rotating rod (7). The rotating rod (7) is fixedly connected inside the semicircular ring B (6). The two ends of the rotating rod (7) are rotatably connected to the corresponding two side walls of the semicircular ring A (4). When the upper clamping plate (1) and the lower clamping plate (2) are in contact and the two semicircular rings A (4) are in contact, the two semicircular rings B (6) can rotate to a state of mutual contact, forming a second complete ring coaxial with the first complete ring, or rotate to be completely stored between the semicircular ring A (4) and the upper clamping plate (1) or the lower clamping plate (2) without affecting the use of the semicircular ring A (4).

3. The clamping mechanism for PFA pipe welding according to claim 2, characterized in that, Two magnets (8) are provided inside the upper clamping plate (1), the lower clamping plate (2), and the semi-circular ring A (4). A metal layer (9) is provided on the outer side of the semi-circular ring A (4) and the outer side of the semi-circular ring B (6).

4. The clamping mechanism for PFA pipe welding according to claim 3, characterized in that, Both sides of the upper clamping plate (1) and the lower clamping plate (2) are provided with arc-shaped slides (10).

5. The clamping mechanism for PFA pipe welding according to claim 1, characterized in that, The lower clamping plate (2) is symmetrically fixedly connected to a sliding cylinder (11).

6. The clamping mechanism for PFA pipe welding according to claim 1, characterized in that, A buckle (12) is installed between one corner of the side wall of the upper clamping plate (1) and the lower clamping plate (2).

7. The clamping mechanism for PFA pipe welding according to claim 6, characterized in that, The buckle (12) includes a locking tongue (13) and a locking groove (14). The upper clamping plate (1) is fixedly connected to the side wall of the locking tongue (13), and the lower clamping plate (2) is fixedly connected to the side wall of the locking groove (14). The locking tongue (13) cooperates with the corresponding locking groove (14).

8. The clamping mechanism for PFA pipe welding according to claim 2, characterized in that, A knob (15) is fixedly connected to one end of the short rod (5) and both ends of the rotating rod (7).

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