Fastening device for connecting hard pipe and Teflon pipe

Abstract

The invention discloses a fastening device for connecting a hard pipe and a Teflon pipe, and relates to the technical field of connectors, the fastening device comprises an upper positioning pipe and a lower positioning pipe, the two sides of the upper positioning pipe and the lower positioning pipe are fixedly connected with mounting plates, and the front and rear sides of the upper positioning pipe and the lower positioning pipe are provided with mounting threaded rods; the mounting plate is mounted and connected through the mounting threaded rod, the connecting mechanism is arranged in the upper positioning pipe and the lower positioning pipe and used for connecting and moving the connecting hard pipe and the Teflon pipe, and the sealing mechanism is arranged in the upper positioning pipe and the lower positioning pipe and used for further sealing the joint. The connecting device has the beneficial effects that tight connection of the connecting hard pipe and the Teflon pipe is greatly improved, and meanwhile, the device adopts the adjustable positioning clamping plate, so that a user can conveniently move the connecting hard pipe and the Teflon pipe.

Description

Technical Field

[0001] The present invention relates to the technical field of joints, and particularly relates to a buckling device for connecting a hard pipe and a Teflon pipe. Background Art

[0002] When connecting a hard pipe and a Teflon pipe, a threaded joint is generally used for connection. However, the existing threaded joint is relatively troublesome to operate, and the existing threaded joint is completely sealed by a sealing gasket. Over time, the sealing gasket will corrode and damage, so the sealing performance will become poor, and there may be a situation of liquid leakage. Summary of the Invention

[0003] Therefore, the present invention provides a buckling device for connecting a hard pipe and a Teflon pipe. By placing the hard pipe and the Teflon pipe to be connected inside the lower positioning pipe, then covering the two pipes with the upper positioning pipe, and screwing the two installation threaded rods, the upper positioning pipe and the lower positioning pipe are tightly joined together. After the joining is completed, pulling a plurality of pull plates enables the connecting mechanism to positionally connect the hard pipe and the Teflon pipe, and at the same time, the sealing mechanism further seals the connection part, so as to solve the problems that the existing threaded joint is relatively troublesome to operate, and the existing threaded joint is completely sealed by a sealing gasket. Over time, the sealing gasket will corrode and damage, so the sealing performance will become poor, and there may be a situation of liquid leakage.

[0004] To achieve the above object, the present invention provides the following technical solution: A buckling device for connecting a hard pipe and a Teflon pipe, including an upper positioning pipe and a lower positioning pipe. Both sides of the upper positioning pipe and the lower positioning pipe are fixedly connected with mounting plates. Mounting threaded rods are provided on the front and rear sides of the upper positioning pipe and the lower positioning pipe, and the mounting plates are installed and connected through the mounting threaded rods; A connecting mechanism, which is arranged inside the upper positioning pipe and the lower positioning pipe, and is used for connecting and moving the hard pipe and the Teflon pipe; A sealing mechanism, which is arranged inside the upper positioning pipe and the lower positioning pipe, and is used for further sealing the connection part; The connecting mechanism includes a plurality of positioning clamping plates, which are respectively arranged inside the upper positioning pipe and the lower positioning pipe. Positioning rings are fixedly embedded inside the upper positioning pipe and the lower positioning pipe. Two connecting grooves are opened inside the positioning rings. The positioning rings are arranged between the two positioning clamping plates, and sealing rings are fixedly connected to the inner sides of the two positioning rings.

[0005] Preferably, the connecting mechanism includes two winding wheels, the two winding wheels are respectively embedded in the two connecting grooves, two pulling ropes are arranged on the outer sides of the two winding wheels, the outer ends of the two pulling ropes both extend to the outside of the connecting grooves, and the plurality of pulling ropes are respectively fixedly connected to the inner sides of the plurality of positioning clamping plates.

[0006] Preferably, a movable shaft is fixedly connected to the inside of each of the plurality of winding wheels, the outer ends of the two movable shafts respectively penetrate through the outer sides of the upper positioning tube and the lower positioning tube, transmission boxes are fixedly connected to the outer sides of the upper positioning tube and the lower positioning tube, the two movable shafts respectively extend into the two transmission boxes and are movably connected to the transmission boxes through rolling bearings.

[0007] Preferably, gears are embedded in the two transmission boxes, the two gears are respectively fixedly sleeved on the outer sides of the two movable shafts, two toothed plates are embedded in the transmission boxes, the toothed plates are respectively meshed with the two gears, positioning boxes are fixedly connected to the outer sides of the two transmission boxes, the two movable shafts extend into the two positioning boxes, and scroll springs are embedded in the two positioning boxes, and the two scroll springs are respectively fixedly sleeved on the outer sides of the two movable shafts.

[0008] Preferably, limiting bars are fixedly connected to the outer sides of the two toothed plates, movable grooves are formed on both sides of the two movable shafts, the two limiting bars respectively slide in the movable grooves, two connecting blocks are arranged on the outer sides of the two transmission boxes, the two connecting blocks are respectively fixedly connected to the plurality of limiting bars, and two moving frames are arranged on the outer sides of the upper positioning tube and the lower positioning tube, and the plurality of moving frames are respectively fixedly connected to the two connecting blocks.

[0009] Preferably, mounting blocks are fixedly connected to the inner ends of the plurality of moving frames, clamping rods are fixedly connected to the bottoms of the two upper mounting blocks, clamping grooves are formed at the tops of the two lower mounting blocks, the two clamping rods are respectively embedded in the two clamping grooves, telescopic handles are fixedly connected to the outer sides of the plurality of mounting blocks, and positioning buckles are fixedly connected to the outer sides of the plurality of mounting plates, and the positioning buckles are matched with the telescopic handles.

[0010] Preferably, a plurality of moving grooves are formed in the inner sides of the upper positioning tube and the lower positioning tube, limiting rods are fixedly embedded in the plurality of moving grooves, limiting blocks are sleeved on the outer sides of the plurality of limiting rods, first springs are fixedly sleeved on the outer sides of the two limiting rods, telescopic rods are fixedly connected to the inner sides of the plurality of limiting blocks, the plurality of telescopic rods are respectively fixedly connected to the plurality of positioning clamping plates, and second springs are sleeved on the outer sides of the plurality of telescopic rods.

[0011] Preferably, the sealing mechanism includes a plurality of movable rods, the plurality of movable rods are respectively arranged on both sides of the plurality of positioning clamping plates, and the movable rods are movably connected to the positioning clamping plates through hinges.

[0012] Preferably, piston tubes are embedded inside both the upper positioning tube and the lower positioning tube. Piston plates are embedded inside both of the piston tubes. One end of each piston plate is fixedly connected to a piston rod. The piston rods extend outside the piston tubes. Positioning grooves are formed at the outer ends of the plurality of movable rods, and the piston rods are respectively embedded inside the plurality of positioning grooves.

[0013] Preferably, a plurality of sealing grooves are formed inside both of the positioning rings. Sealing air bags are embedded inside the plurality of sealing grooves. The air inlet pipes of the plurality of sealing air bags respectively extend outside both sides of the positioning rings, and the plurality of piston tubes are respectively communicated with the plurality of sealing air bags.

[0014] The beneficial effects of the present invention are as follows: By the user placing the connecting hard tube and the Teflon tube inside the lower positioning tube, then covering the two tubes with the upper positioning tube and screwing the two installation threaded rods, the upper positioning tube and the lower positioning tube are tightly fitted together. After the fitting is completed, pulling a plurality of pull plates enables the connecting mechanism to positionally connect the connecting hard tube and the Teflon tube. At the same time, the sealing mechanism further seals the connection point, so as to solve the problems that the existing threaded joints are relatively troublesome to operate, and the existing threaded joints are completely sealed by a sealing gasket, and the sealing gasket will be corroded and damaged over time, so the sealing performance will deteriorate and liquid leakage may occur. The present invention greatly improves the tight connection of the connecting hard tube and the Teflon tube. At the same time, the present device adopts adjustable positioning clamping plates, which facilitate the user to move the connecting hard tube and the Teflon tube, so that the connecting hard tube and the Teflon tube move inward, making the connecting hard tube and the Teflon tube tightly abut and connect, resulting in a better sealing effect; In addition, the present device adopts the structural design of the piston rod and the piston tube, enabling the connecting mechanism and the sealing mechanism to work simultaneously, so that the plurality of sealing air bags can further seal the connection point of the connecting hard tube and the Teflon tube, resulting in a better sealing effect. Description of the Drawings

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only exemplary, and for those of ordinary skill in the art, other implementation drawings can be obtained by extending the provided drawings without creative efforts.

[0016] The structures, ratios, sizes, etc. shown in this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions under which the present invention can be implemented. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention.

[0017] Figure 1 is a schematic diagram of the overall structure provided by the present invention; Figure 2 is a three-dimensional structure schematic diagram of the lower positioning tube and the positioning ring provided by the present invention; Figure 3 is a three-dimensional structure schematic diagram of the partial front view cross-section provided by the present invention; Figure 4 is a three-dimensional structure schematic diagram of the partial connection mechanism provided by the present invention; Figure 5 provided by the present invention Figure 4 is an enlarged view of part A in; Figure 6 is a three-dimensional structure schematic diagram of the sealing mechanism provided by the present invention; Figure 7 provided by the present invention Figure 6 is an enlarged view of part B in; In the figure: 1 upper positioning tube; 2 lower positioning tube; 3 mounting plate; 4 mounting threaded rod; 5 positioning clamping plate; 6 positioning ring; 7 connecting groove; 8 sealing ring; 9 winding wheel; 10 pulling rope; 11 movable shaft; 12 transmission box; 13 gear; 14 toothed plate; 15 positioning box; 16 scroll spring; 17 limiting strip; 18 connecting block; 19 moving frame; 20 mounting block; 21 clamping rod; 22 clamping groove; 23 telescopic handle; 24 positioning buckle; 25 limiting rod; 26 limiting block; 27 first spring; 28 telescopic rod; 29 second spring; 30 movable rod; 31 piston tube; 32 piston plate; 33 piston rod; 34 positioning groove; 35 sealing airbag. Detailed implementation manners

[0018] The following is a description of the preferred embodiments of the present invention with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0019] Referring to the attached Figure 1 - attached Figure 7 , a buckling device for connecting a hard tube and a Teflon tube provided by the present invention includes an upper positioning tube 1 and a lower positioning tube 2. Mounting plates 3 are fixedly connected to both sides of the upper positioning tube 1 and the lower positioning tube 2. Mounting threaded rods 4 are provided on the front and rear sides of the upper positioning tube 1 and the lower positioning tube 2. The mounting plates 3 are installed and connected through the mounting threaded rods 4; A connecting mechanism is provided inside the upper positioning pipe 1 and the lower positioning pipe 2. The connecting mechanism is used for connecting and moving the connecting hard pipe and the Teflon pipe. A sealing mechanism is provided inside the upper positioning pipe 1 and the lower positioning pipe 2. The sealing mechanism is used for further sealing the connection part. The connecting mechanism includes a plurality of positioning clamping plates 5 which are respectively arranged inside the upper positioning pipe 1 and the lower positioning pipe 2. Positioning rings 6 are fixedly embedded inside both the upper positioning pipe 1 and the lower positioning pipe 2. Two connecting grooves 7 are formed inside the positioning ring 6. The positioning ring 6 is arranged between the two positioning clamping plates 5. Sealing rings 8 are fixedly connected to the inner sides of the two positioning rings 6. In this implementation scheme, the user places the connecting hard pipe and the Teflon pipe inside the lower positioning pipe 2, then covers the two pipes with the upper positioning pipe 1, and turns the two installation threaded rods 4 to closely fit the upper positioning pipe 1 and the lower positioning pipe 2. After the fitting is completed, pull a plurality of pull plates to make the connecting mechanism positionally connect the connecting hard pipe and the Teflon pipe, and at the same time, the sealing mechanism further seals the connection part. Among them, in order to achieve the purpose of pipeline connection, the present device is implemented by the following technical solution: The connection mechanism includes two winding wheels 9, and the two winding wheels 9 are respectively embedded inside two connection grooves 7. Two pulling ropes 10 are arranged outside the two winding wheels 9, and the outer ends of the two pulling ropes 10 both extend outside the connection grooves 7. The plurality of pulling ropes 10 are respectively fixedly connected to the inner sides of the plurality of positioning clamping plates 5. An activity shaft 11 is fixedly connected inside each of the plurality of winding wheels 9. The outer ends of the two activity shafts 11 respectively penetrate through the outer sides of the upper positioning pipe 1 and the lower positioning pipe 2. Transmission boxes 12 are fixedly connected to the outer sides of the upper positioning pipe 1 and the lower positioning pipe 2. The two activity shafts 11 respectively extend into the two transmission boxes 12 and are movably connected to the transmission boxes 12 through rolling bearings. Two gears 13 are embedded inside the two transmission boxes 12. The two gears 13 are respectively fixedly sleeved outside the two activity shafts 11. Two toothed plates 14 are embedded inside the transmission boxes 12. The toothed plates 14 are respectively meshed with the two gears 13. Positioning boxes 15 are fixedly connected to the outer sides of the two transmission boxes 12. The two activity shafts 11 extend into the two positioning boxes 15. Scroll springs 16 are embedded inside the two positioning boxes 15. The two scroll springs 16 are respectively fixedly sleeved outside the two activity shafts 11. Limiting bars 17 are fixedly connected to the outer sides of the two toothed plates 14. Activity grooves are formed on both sides of the two activity shafts 11. The two limiting bars 17 respectively slide with the activity grooves. Two connection blocks 18 are arranged outside the two transmission boxes 12. The two connection blocks 18 are respectively fixedly connected to the plurality of limiting bars 17. Two moving frames 19 are arranged on the outer sides of the upper positioning pipe 1 and the lower positioning pipe 2. The plurality of moving frames 19 are respectively fixedly connected to the two connection blocks 18. Mounting blocks 20 are fixedly connected to the inner ends of the plurality of moving frames 19. Clamping rods 21 are fixedly connected to the bottoms of the two upper mounting blocks 20. Clamping grooves 22 are formed at the tops of the two lower mounting blocks 20. The two clamping rods 21 are respectively embedded inside the two clamping grooves 22. Telescopic handles 23 are fixedly connected to the outer sides of the plurality of mounting blocks 20. Positioning buttons 24 are fixedly connected to the outer sides of the plurality of mounting plates 3. The positioning buttons 24 are matched with the telescopic handles 23. A plurality of moving grooves are formed on the inner sides of the upper positioning pipe 1 and the lower positioning pipe 2. Limiting rods 25 are fixedly embedded inside the plurality of moving grooves. Limiting blocks 26 are sleeved outside the plurality of limiting rods 25. First springs 27 are fixedly sleeved outside the two limiting rods 25. A plurality of telescopic rods 28 are fixedly connected to the inner sides of the plurality of limiting blocks 26. The plurality of telescopic rods 28 are respectively fixedly connected to the plurality of positioning clamping plates 5. Second springs 29 are sleeved outside the plurality of telescopic rods 28; The user pulls two telescopic handles 23, causing two moving frames 19 to move inward. The movement of the two moving frames 19 drives the movement of multiple toothed plates 14. The movement of the multiple toothed plates 14 drives the rotation of two gears 13. The rotation of the two gears 13 drives the rotation of two movable shafts 11. The rotation of the movable shafts 11 drives the rotation of two winding wheels 9. The rotation of the two winding wheels 9 drives the contraction of multiple pull ropes 10. The winding of the multiple pull ropes 10 causes multiple positioning clamping plates 5 to move towards the middle. Since the multiple positioning clamping plates 5 clamp the connecting hard pipe and the Teflon pipe, the movement of the multiple positioning clamping plates 5 towards the middle will drive the connecting hard pipe and the Teflon pipe to be joined together in the middle. At this time, the connecting hard pipe and the Teflon pipe are hermetically connected; Among them, in order to achieve the purpose of further sealing, the present device is implemented by the following technical solution: The sealing mechanism includes multiple movable rods 30. The multiple movable rods 30 are respectively arranged on both sides of the multiple positioning clamping plates 5. The movable rods 30 and the positioning clamping plates 5 are movably connected by hinges. Piston pipes 31 are embedded in both the upper positioning pipe 1 and the lower positioning pipe 2. Piston plates 32 are embedded in both of the two piston pipes 31. One end of the piston plate 32 is fixedly connected to a piston rod 33. The piston rod 33 extends to the outside of the piston pipe 31. Positioning grooves 34 are opened at the outer ends of the multiple movable rods 30. The multiple piston rods 33 are respectively embedded in the multiple positioning grooves 34. Multiple sealing grooves are opened in both of the two positioning rings 6. Sealing air bags 35 are embedded in the multiple sealing grooves. The inlet pipes of the multiple sealing air bags 35 respectively extend to the outside of both sides of the positioning rings 6. The multiple piston pipes 31 are respectively communicated with the multiple sealing air bags 35; When the positioning clamping plates 5 move towards the middle, they will drive the movable rods 30 to move. The movement of the movable rods 30 drives the piston rods 33 to move. The movement of the piston rods 33 causes the piston plates 32 to move inside the piston pipes 31, enabling air flow to enter the multiple sealing air bags 35, causing the sealing air bags 35 to bulge, thereby performing further sealing work on the connection between the connecting hard pipe and the Teflon pipe and making the sealing effect better.

[0020] The usage process of the present invention is as follows: The user places the connecting hard pipe and the Teflon pipe inside the lower positioning pipe 2, then covers the two pipes with the upper positioning pipe 1, and turns the two mounting threaded rods 4 to closely fit the upper positioning pipe 1 and the lower positioning pipe 2. After the fitting is completed, pull multiple pull plates, so that the connecting mechanism positions and connects the connecting hard pipe and the Teflon pipe, and at the same time, the sealing mechanism further seals the connection. The user pulls the two telescopic handles 23, so that the two moving frames 19 move inward. The movement of the two moving frames 19 drives the movement of multiple toothed plates 14. The movement of multiple toothed plates 14 drives the rotation of the two gears 13. The rotation of the two gears 13 drives the rotation of the two movable shafts 11. The rotation of the movable shafts 11 drives the rotation of the two winding wheels 9. The rotation of the two winding wheels 9 drives the contraction of multiple pull ropes 10. The winding of multiple pull ropes 10 causes multiple positioning clamping plates 5 to move towards the middle. Since the multiple positioning clamping plates 5 clamp the connecting hard pipe and the Teflon pipe, the movement of the multiple positioning clamping plates 5 towards the middle will drive the connecting hard pipe and the Teflon pipe to fit towards the middle. At this time, the connecting hard pipe and the Teflon pipe are hermetically connected. When the positioning clamping plate 5 moves towards the middle, it will drive the movement of the movable rod 30. The movement of the movable rod 30 drives the movement of the piston rod 33. The movement of the piston rod 33 causes the piston plate 32 to move inside the piston tube 31, so that air enters multiple sealing air bags 35, causing the sealing air bags 35 to bulge, thereby further sealing the connection between the connecting hard pipe and the Teflon pipe, and making the sealing effect better.

[0021] The above is only a preferred embodiment of the present invention. Any person skilled in the art may modify the present invention by using the technical solutions described above or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent replacement made according to the technical solutions of the present invention falls within the scope of protection required by the present invention.

Claims

1. A fastening device for connecting a hard tube and a Teflon tube, characterized in that: include An upper positioning tube (1) and a lower positioning tube (2), both sides of the upper positioning tube (1) and the lower positioning tube (2) are fixedly connected with a mounting plate (3), both front and rear sides of the upper positioning tube (1) and the lower positioning tube (2) are provided with mounting threaded rods (4), and the mounting plate (3) is mounted and connected via the mounting threaded rods (4); A connecting mechanism, the connecting mechanism being arranged inside the upper positioning tube (1) and the lower positioning tube (2), the connecting mechanism being used to connect and move the connecting hard tube and the Teflon tube; A sealing mechanism, the sealing mechanism being arranged inside the upper positioning tube (1) and the lower positioning tube (2), the sealing mechanism being used to further seal the connection; The connection mechanism comprises a plurality of positioning clamps (5), wherein the plurality of positioning clamps (5) are respectively arranged inside the upper positioning tube (1) and the lower positioning tube (2), wherein a positioning ring (6) is fixedly embedded inside the upper positioning tube (1) and the lower positioning tube (2), wherein two connecting grooves (7) are provided inside the positioning ring (6), wherein the positioning ring (6) is arranged between the two positioning clamps (5), and a sealing ring (8) is fixedly connected to the inner side of the two positioning rings (6).

2. A fastening device for connecting a hard tube and a Teflon tube according to claim 1, characterized in that: The connection mechanism comprises two reel wheels (9), the two reel wheels (9) are respectively embedded in two connection grooves (7), two pull ropes (10) are arranged outside the two reel wheels (9), the outer ends of the two pull ropes (10) extend to the outside of the connection groove (7), and the plurality of pull ropes (10) are respectively fixedly connected to the inner sides of the plurality of positioning clamps (5).

3. A fastening device for connecting a hard tube and a Teflon tube according to claim 2, characterized in that: A plurality of the winding wheels (9) are fixedly connected to movable shafts (11) at their interiors, and the outer ends of two movable shafts (11) respectively penetrate the outer sides of the upper positioning tube (1) and the lower positioning tube (2), and the outer sides of the upper positioning tube (1) and the lower positioning tube (2) are fixedly connected to transmission boxes (12), and the two movable shafts (11) respectively extend into the interiors of the two transmission boxes (12) and are movably connected to the transmission boxes (12) via rolling bearings.

4. A fastening device for connecting a hard tube and a Teflon tube according to claim 3, characterized in that: Gears (13) are embedded in the two transmission boxes (12), and the two gears (13) are respectively fixedly sleeved on the outside of the two movable shafts (11). Two tooth plates (14) are embedded in the transmission box (12), and the tooth plates (14) are respectively meshed and connected with the two gears (13). Positioning boxes (15) are fixedly connected to the outside of the two transmission boxes (12). The two movable shafts (11) extend into the inside of the two positioning boxes (15). Scroll springs (16) are embedded in the two positioning boxes (15), and the two scroll springs (16) are respectively fixedly sleeved on the outside of the two movable shafts (11).

5. A fastening device for connecting a hard tube and a Teflon tube according to claim 4, characterized in that: The outer sides of the two tooth plates (14) are fixedly connected to limit bars (17), the two movable shafts (11) are provided with movable grooves on both sides, the two limit bars (17) slide with the movable grooves respectively, the outer sides of the two transmission boxes (12) are provided with two connecting blocks (18), the two connecting blocks (18) are respectively fixedly connected to the plurality of limit bars (17), and the outer sides of the upper positioning tube (1) and the lower positioning tube (2) are provided with two moving frames (19), the plurality of moving frames (19) are respectively fixedly connected to the two connecting blocks (18).

6. A fastening device for connecting a hard tube and a Teflon tube according to claim 5, characterized in that: The inner ends of the plurality of movable frames (19) are fixedly connected to mounting blocks (20), the bottoms of the two top mounting blocks (20) are fixedly connected to clamping rods (21), the tops of the two bottom mounting blocks (20) are provided with clamping grooves (22), the two clamping rods (21) are respectively embedded in the two clamping grooves (22), the outer sides of the plurality of mounting blocks (20) are fixedly connected to telescopic handles (23), and the outer sides of the plurality of mounting plates (3) are fixedly connected to positioning buckles (24), and the positioning buckles (24) match the telescopic handles (23).

7. A fastening device for connecting a hard tube and a Teflon tube according to claim 2, characterized in that: A plurality of movable grooves are provided on the inner sides of the upper positioning tube (1) and the lower positioning tube (2), and a plurality of limit rods (25) are fixedly embedded in the inner sides of the plurality of movable grooves. A plurality of limit rods (25) are sleeved on the outer sides of the plurality of limit rods (25), and a first spring (27) is fixedly sleeved on the outer sides of the two limit rods (25). A plurality of telescopic rods (28) are fixedly connected to the inner sides of the plurality of limit blocks (26), and the plurality of telescopic rods (28) are respectively fixedly connected to the plurality of positioning clamps (5), and a second spring (29) is sleeved on the outer sides of the plurality of telescopic rods (28).

8. A fastening device for connecting a hard tube and a Teflon tube according to claim 4, characterized in that: The sealing mechanism comprises a plurality of movable rods (30), the plurality of movable rods (30) being respectively arranged on both sides of a plurality of positioning clamping plates (5), and the movable rods (30) being movably connected to the positioning clamping plates (5) via hinges.

9. A fastening device for connecting a hard tube and a Teflon tube according to claim 8, characterized in that: A piston tube (31) is embedded in the upper positioning tube (1) and the lower positioning tube (2), and a piston plate (32) is embedded in the two piston tubes (31). One end of the piston plate (32) is fixedly connected to a piston rod (33), and the piston rod (33) extends to the outside of the piston tube (31). Positioning grooves (34) are formed at the outer ends of the plurality of movable rods (30), and the plurality of piston rods (33) are respectively embedded in the plurality of positioning grooves (34).

10. A fastening device for connecting a hard tube and a Teflon tube according to claim 9, characterized in that: A plurality of sealing grooves are provided inside the two positioning rings (6), and sealing airbags (35) are embedded inside the plurality of sealing grooves. Air inlet pipes of the plurality of sealing airbags (35) extend to the outside of both sides of the positioning rings (6), respectively. The plurality of piston tubes (31) are respectively connected to the plurality of sealing airbags (35).

Images