Printing ink-jet device used on industrial robot

Abstract

The invention relates to the technical field of ink-jet devices, in particular to a printing ink-jet device used on an industrial robot, which comprises a robot body and an ink nozzle arranged on the robot body, the robot body is provided with a mounting cylinder, the bottom of the mounting cylinder is circumferentially provided with a plurality of butt-joint holes around the circle center, and the butt-joint holes are communicated with the mounting cylinder. The plurality of butt-joint holes are distributed in a staggered manner and are divided into a cleaning group and an ink-jet group, cleaning pipes are arranged on the butt-joint holes of the cleaning group, ink-jet pipes are arranged on the butt-joint holes of the ink-jet group, and the ends, attached to the bottom of the mounting cylinder, of the cleaning pipes and the ink-jet pipes are communicated with second communicating pipes; a plurality of limiting assemblies are uniformly arranged on the mounting cylinder, an adjusting cylinder is arranged on the mounting cylinder through the limiting assemblies, an elastic telescopic piece is arranged in the adjusting cylinder, and the mounting cylinder is arranged in the adjusting cylinder through the elastic telescopic piece.

Description

Technical Field

[0001] The present invention relates to the technical field of inkjet devices, and more specifically, to an inkjet printing device used on an industrial robot. Background Art

[0002] With the increasing requirements for automation and precision in the manufacturing industry, industrial robots are increasingly widely used in production lines. Especially in some scenarios that require high precision and repetitive operations, such as electronic component manufacturing, automotive parts production, etc., the role of industrial robots is particularly important. Among them, inkjet printing technology, as a non-contact marking method, has been widely used in the industrial field due to its high efficiency, flexibility, environmental protection and other characteristics.

[0003] However, in the current inkjet devices used on industrial robots, during actual operation, after the nozzles are continuously used for a period of time, problems such as blockage often occur. To ensure that the nozzles are unobstructed during the next use, necessary maintenance work needs to be carried out after each use. Unfortunately, most of the existing maintenance methods involve disassembling the nozzles and then injecting cleaning liquid into the syringe for spraying and washing. This method is not only cumbersome but also inefficient.

[0004] Based on this, the present invention discloses an inkjet printing device used on an industrial robot. Summary of the Invention

[0005] To solve the problem in the background art that the nozzles of the inkjet devices of industrial robots need to be maintained by cumbersome and inefficient disassembly and syringe cleaning methods to prevent blockage after use, the present invention provides an inkjet printing device used on an industrial robot, which includes an inkjet head disposed on a robot body, an installation cylinder is disposed on the robot body, a plurality of docking holes are circumferentially opened at the bottom of the installation cylinder around the center of the circle, the plurality of docking holes are arranged in a staggered layout and are divided into a cleaning group and an inkjet group, a cleaning pipe is disposed on the docking holes of the cleaning group, an inkjet pipe is disposed on the docking holes of the inkjet group, and one ends of the cleaning pipe and the inkjet pipe that are in contact with the bottom of the installation cylinder are both communicated with a second communication pipe;

[0006] In this technical solution, to prevent cumbersome disassembly, the inkjet pipe corresponding to the docking hole of the inkjet group can be made to correspond to the cleaning pipe corresponding to the docking hole of the cleaning group after rotating a certain angle.

[0007] As a further improvement of this technical solution, a plurality of limiting components are uniformly disposed on the installation cylinder, an adjusting cylinder is disposed on the installation cylinder through the limiting components, an elastic telescopic member is disposed in the adjusting cylinder, and the installation cylinder is disposed in the adjusting cylinder through the elastic telescopic member.

[0008] As a further improvement of the technical solution, the limiting component includes an arc-shaped sliding groove formed on the outer wall of the installation cylinder. On the installation cylinder, a first longitudinal sliding groove and a second longitudinal sliding groove are respectively formed on both sides of the arc-shaped sliding groove. A first slider is slidably connected in the first longitudinal sliding groove, and the first slider is fixedly connected to the inner wall of the adjusting cylinder. Secondly, the sector angle corresponding to the arc-shaped sliding groove is adapted to the angle required for the first communication pipe to rotate from the inkjet group to the cleaning group.

[0009] As a further improvement of the technical solution, a number of first communication pipes corresponding to the number of docking holes in the inkjet group are arranged in the adjusting cylinder. A connecting pipe is arranged at the bottom of the first communication pipe, and the first communication pipe is communicated with the ink nozzle through the connecting pipe; an elastic sealing ring is arranged on the first communication pipe, the inner diameter of the docking hole is adapted to the inner diameter of the elastic sealing ring, a sealing component is arranged above the elastic sealing ring on the first communication pipe, a limiting ring is fixedly arranged at the bottom of the elastic sealing ring on the first communication pipe. When the top of the elastic sealing ring is in contact with the bottom of the second communication pipe, the limiting ring is in contact with the bottom of the installation cylinder.

[0010] To rotate and transform the sealing performance of the connection between the first communication pipe and the second communication pipe when the inkjet group is docked with the cleaning group;

[0011] As a further improvement of the technical solution, first sliding grooves are symmetrically formed on both sides of the first communication pipe. The sealing component includes a second slider slidably arranged in the first sliding groove, and the second slider is fixedly connected to a deformation sealing ring, and the deformation sealing ring is sleeved on the first communication pipe.

[0012] As a further improvement of the technical solution, a clamping interface is formed at the bottom of the second communication pipe. The outer diameter of the deformation sealing ring is adapted to the inner diameter of the second communication pipe. The inner diameter of the clamping interface is smaller than the outer diameter of the deformation sealing ring, and the inner diameter of the clamping interface is larger than the outer diameter of the first communication pipe. Moreover, the deformation sealing ring has a frustum-shaped structure, and the inner part of the deformation sealing ring is a concave structure; secondly, the heights of the first longitudinal sliding groove and the second longitudinal sliding groove are greater than the height from the top of the limiting ring to the top end of the first communication pipe.

[0013] In this technical solution, in order to further rely on the pressure in the second communication pipe to automatically increase the sealing performance, the bottom of the first sliding groove is located above the inner wall of the bottom of the second communication pipe, and the top of the concave structure of the deformation sealing ring can be in contact with the top of the elastic sealing ring after being deformed.

[0014] Compared with the prior art, the beneficial effects of the present invention:

[0015] 1. In an inkjet printing device used on an industrial robot, a convenient cleaning conversion mechanism is realized. By rotating the adjustment cylinder (component), it is possible to convert between the inkjet group docking hole and the cleaning group docking hole without disassembling the entire nozzle device. Specifically, when switching from the inkjet mode to the cleaning mode, the user only needs to pull down the adjustment cylinder and rotate it to the corresponding position, simplifying the traditional cumbersome disassembly and syringe cleaning methods, improving work efficiency, and reducing downtime. In addition, since there is no need for frequent disassembly and assembly, the risk of damaging the equipment is also reduced.

[0016] 2. In an inkjet printing device used on an industrial robot, an optimized sealing structure is realized. An elastic sealing ring (component) and a deformation sealing ring (component) are provided on the first connecting pipe (component). These components work together to ensure a tight connection between the inkjet pipe (component) and the cleaning pipe (component) and the second connecting pipe (component), effectively preventing ink leakage or external contaminants from entering the system, and ensuring printing quality and equipment life. Especially in a high-pressure environment, the double-sealing mechanism enhances the stability and reliability of the system.

[0017] 3. In an inkjet printing device used on an industrial robot, automatic limiting is realized. The limiting component includes an arc-shaped chute, a first longitudinal chute, a second longitudinal chute, etc., realizing a quick switch and stable connection between the ink nozzle during inkjet and cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 is a schematic diagram of the structure of the mounting cylinder of the present invention;

[0020] Figure 3 is a top view of the structure of the mounting cylinder of the present invention;

[0021] Figure 4 is an exploded view of the structure of the mounting cylinder of the present invention;

[0022] Figure 5 is a schematic diagram of the structure of the adjustment cylinder of the present invention;

[0023] Figure 6 is a cross-sectional view of the structure of the adjustment cylinder of the present invention

[0024] Figure 7 is a schematic diagram of the structure of the inkjet pipe of the present invention;

[0025] Figure 8 is Figure 7 an enlarged view of the structure at A in

[0026] Figure 9 is Figure 7Enlarged view of the structure at position B in the [specific object];

[0027] Figure 10 Structural schematic diagram of the deformation sealing ring of the present invention;

[0028] Figure 11 Structural schematic diagram of the elastic telescopic member of the present invention;

[0029] Figure 12 is Figure 11 Enlarged view of the structure at position C in the [specific object].

[0030] The meanings of each label in the figure are as follows:

[0031] 1. Robot body; 2. Installation cylinder; 3. Adjusting cylinder; 4. Inkjet nozzle; 5. Cleaning pipe; 6. Inkjet pipe; 7. Limiting component; 8. Connecting pipe; 9. Limiting ring; 10. Docking hole; 11. Elastic telescopic member; 12. Elastic sealing ring; 13. First communication pipe; 14. Second communication pipe; 15. Sealing component; 16. First sliding groove; 17. Clamping interface;

[0032] 71. Arc-shaped sliding groove; 72. First longitudinal sliding groove; 73. Second longitudinal sliding groove; 74. First slider;

[0033] 151. Deformation sealing ring; 152. Second slider. Specific implementation manner

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] After the nozzle of the existing industrial robot inkjet device is used, it needs to be maintained by a cumbersome and inefficient disassembly and syringe cleaning method to prevent blockage.

[0036] For this reason, the present invention provides an inkjet printing device used on an industrial robot. Refer to Figures 1-4 As shown, it includes a robot body 1 and an inkjet nozzle 4 provided on the robot body 1. An installation cylinder 2 is provided on the robot body 1. A plurality of docking holes 10 are circumferentially formed at the bottom of the installation cylinder 2 around the center of the circle. The plurality of docking holes 10 are arranged in a staggered layout and are divided into a cleaning group and an inkjet group. A cleaning pipe 5 is provided on the docking holes 10 of the cleaning group, and an inkjet pipe 6 is provided on the docking holes 10 of the inkjet group. One end of the cleaning pipe 5 and the inkjet pipe 6 that fits with the bottom of the installation cylinder 2 is connected to a second communication pipe 14.

[0037] During operation, through Figure 2 andFigure 4 It can be seen that the inkjet tube 6 corresponding to the docking hole 10 of the inkjet group can correspond to the cleaning tube 5 corresponding to the docking hole 10 of the cleaning group after rotating a certain angle, which prepares for the subsequent direct cleaning by the adapter. The cleaning tube 5 is connected to the corresponding cleaning equipment, and the inkjet tube 6 is connected to the corresponding inkjet equipment.

[0038] Specifically, referring to Figures 4-6 As shown, a number of limiting components 7 are evenly arranged on the mounting cylinder 2. The adjusting cylinder 3 is arranged on the mounting cylinder 2 through the limiting components 7. An elastic telescopic member 11 is arranged in the adjusting cylinder 3, and the mounting cylinder 2 is arranged in the adjusting cylinder 3 through the elastic telescopic member 11.

[0039] Among them, the limiting component 7 includes an arc-shaped sliding groove 71 opened on the outer wall of the mounting cylinder 2. The first longitudinal sliding groove 72 and the second longitudinal sliding groove 73 are respectively opened on both sides of the arc-shaped sliding groove 71 on the mounting cylinder 2. A first slider 74 is slidably connected in the first longitudinal sliding groove 72, and the first slider 74 is fixedly connected to the inner wall of the adjusting cylinder 3.

[0040] In the initial state, the first slider 74 is located at the top of the first longitudinal sliding groove 72. After the inkjet is completed and the ink nozzle 4 needs to be cleaned, the adjusting cylinder 3 is pulled down. Since the adjusting cylinder 3 and the mounting cylinder 2 are elastically supported by the elastic telescopic member 11, the elastic telescopic member 11 always causes the adjusting cylinder 3 to have a tendency to slide upward. However, due to the existence of the arc-shaped sliding groove 71, the first longitudinal sliding groove 72 and the second longitudinal sliding groove 73, the adjusting cylinder 3 is limited. Therefore, when the adjusting cylinder 3 needs to be rotated, first slide the adjusting cylinder 3 down along the first longitudinal sliding groove 72, and then rotate it along the arc-shaped sliding groove 71. When the first slider 74 slides to the bottom along the arc-shaped sliding groove 71, the ink nozzle 4 will be disconnected from the second communication pipe 14 of the inkjet group. Furthermore, when it rotates to the position of the second longitudinal sliding groove 73, the ink nozzle 4 will be directly below the second communication pipe 14 of the cleaning group. Then, under the elastic force of the elastic telescopic member 11, the adjusting cylinder 3 rises until the first slider 74 is located at the top of the second longitudinal sliding groove 73. At this time, the ink nozzle 4 will be connected to the second communication pipe 14 of the cleaning group, and then the cleaning can be directly carried out.

[0041] Furthermore, referring to Figure 6As shown in the figure, several first connecting pipes 13 corresponding to the number of docking holes 10 in the inkjet group are arranged in the adjusting cylinder 3. A connecting pipe 8 is arranged at the bottom of the first connecting pipe 13, and the first connecting pipe 13 is communicated with the ink nozzle 4 through the connecting pipe 8. An elastic sealing ring 12 is arranged on the first connecting pipe 13. The inner diameter of the docking hole 10 is adapted to the inner diameter of the elastic sealing ring 12. A sealing assembly 15 is arranged above the elastic sealing ring 12 on the first connecting pipe 13. A limiting ring 9 is fixedly arranged at the bottom of the elastic sealing ring 12 on the first connecting pipe 13. When the top of the elastic sealing ring 12 fits with the bottom of the second connecting pipe 14, the limiting ring 9 fits with the bottom of the mounting cylinder 2.

[0042] During operation, during the process of the above-mentioned adjusting cylinder 3 moving downward along the first longitudinal chute 72, the elastic sealing ring 12 disengages from the docking hole 10, and the limiting ring 9 also disengages from the fit with the bottom of the mounting cylinder 2. Then, when rotating from the inkjet group to below the cleaning group, it should be added that the fan-shaped angle corresponding to the arc chute 71 is adapted to the angle required for the first connecting pipe 13 to rotate from the inkjet group to the cleaning group. That is to say, after rotation, at this time, the elastic sealing ring 12 is directly below the docking hole 10 corresponding to the cleaning group. Then, under the action of the elastic telescopic member 11, the adjusting cylinder 3 moves vertically upward along the second longitudinal chute 73, thereby driving the elastic sealing ring 12 to rise. The elastic sealing ring 12 is clamped into the docking hole 10 until the elastic sealing ring 12 passes through a compression process and closely fits with the bottom of the second connecting pipe 14. At this time, the limiting ring 9 also fits with the bottom of the mounting cylinder 2.

[0043] Among them, as Figures 7-12 shown, first chutes 16 are symmetrically opened on both sides of the first connecting pipe 13. The sealing assembly 15 includes a second slider 152 slidably arranged in the first chute 16. The second slider 152 is fixedly connected to a deformable sealing ring 151. The deformable sealing ring 151 is sleeved on the first connecting pipe 13.

[0044] It is worth mentioning that a clamping interface 17 is opened at the bottom of the second connecting pipe 14. The outer diameter of the deformable sealing ring 151 is adapted to the inner diameter of the second connecting pipe 14. The inner diameter of the clamping interface 17 is smaller than the outer diameter of the deformable sealing ring 151, and the inner diameter of the clamping interface 17 is larger than the outer diameter of the first connecting pipe 13. Moreover, the deformable sealing ring 151 has a frustum-shaped structure, and the inside of the deformable sealing ring 151 is a concave structure. Secondly, the heights of the first longitudinal chute 72 and the second longitudinal chute 73 are greater than the height from the top of the limiting ring 9 to the top end of the first connecting pipe 13.

[0045] In addition, the bottom of the first chute 16 is located above the inner wall of the bottom of the second connecting pipe 14, and the top of the concave structure of the deformable sealing ring 151 can fit with the top of the elastic sealing ring 12 after being deformed.

[0046] During operation, following the above steps, after the inkjetting is completed, the adjusting cylinder 3 moves downward, driving the connecting pipe 8 and the first communicating pipe 13 downward. During the downward movement of the first communicating pipe 13, the deformable sealing ring 151 is pulled out. Since the deformable sealing ring 151 is deformable, when the deformable sealing ring 151 passes through the smaller clamping interface 17, it will be pulled and then flipped, causing the original deformable sealing ring 151 with a regular frustum shape to become an inverted frustum shape. At the same time, the deformable sealing ring 151 slides upward along the first sliding groove 16 through the second slider 152 to the top of the first sliding groove 16. Under the limiting action at the top of the first sliding groove 16, the deformable sealing ring 151 is flipped and pulled out as an inverted frustum shape. Following the above, when the first communicating pipe 13 is directly below the docking hole 10 of the cleaning group, the first communicating pipe 13 drives the deformable sealing ring 151 to rise. When the deformable sealing ring 151 contacts the bottom of the second communicating pipe 14, the deformable sealing ring 151 is squeezed again through the clamping interface 17 to become a regular frustum shape. At the same time, the deformable sealing ring 151 enters the interior of the second communicating pipe 14. In such a regular frustum shape, when there is pressure in the second communicating pipe 14, it will impact the deformable sealing ring 151 to make it closely adhere to the bottom of the second communicating pipe 14, thereby sealing the clamping interface 17. After the deformable sealing ring 151 passes through the clamping interface 17, the deformable sealing ring 151 will slide to the bottom end of the first sliding groove 16 through the second slider 152. At this time, the elastic sealing ring 12 also closely adheres to the bottom of the second communicating pipe 14. When the control of the adjusting cylinder 3 is released, under the action of the elastic telescopic member 11, the deformable sealing ring 151 will descend a small distance until the bottom of the deformable sealing ring 151 adheres to the bottom of the second communicating pipe 14. When there is pressure in the second communicating pipe 14, that is, during the cleaning or inkjetting stage, the deformable sealing ring 151 is deformed by the external pressure again, causing the bottom of the concave structure of the deformable sealing ring 151 to adhere to the elastic sealing ring 12, thereby cooperating with the top of the elastic sealing ring 12 and the bottom of the deformable sealing ring 151 to form a seal for the clamping interface 17, ensuring the tight connection between the second communicating pipe 14 and the first communicating pipe 13 during the subsequent cleaning or inkjetting stage; similarly, after the cleaning is completed, pull down the adjusting cylinder 3 and then rotate the adjusting cylinder 3 in the reverse direction until the adjusting cylinder 3 returns below the docking hole 10 of the inkjetting group, and then release it to return to the initial state for the next inkjetting operation.

[0047] It should be added that the adjusting cylinder 3 can be regularly disassembled for cleaning and maintenance to prevent the cleaning liquid or ink remaining in the small gap between the second communicating pipe 14 and the first communicating pipe 13 from accumulating in the adjusting cylinder 3 after multiple switches.

[0048] In summary, through the synergistic action of the spinning and switching mechanism of the adjusting cylinder 3, the dynamic sealing group of the deformation sealing ring 151 / elastic sealing ring 12, and the hard contact positioning system of the limiting ring 9, the quick non-disassembly switching between the inkjet and cleaning modes is achieved, thus effectively solving the problem that the nozzles of the existing inkjet devices of industrial robots need to be maintained by cumbersome and inefficient disassembly and syringe cleaning methods after use to prevent blockage.

[0049] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and all these changes and improvements fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A printing inkjet device used on an industrial robot, comprising a robot body (1), an ink jet head (4) being arranged on the robot body (1), characterized in that: The robot body (1) is provided with a mounting tube (2), the bottom of the mounting tube (2) is provided with a plurality of docking holes (10) in a circumferential direction around the center of a circle, the plurality of docking holes (10) are arranged in a staggered manner and are divided into a cleaning group and an inkjet group, the docking holes (10) of the cleaning group are provided with a cleaning tube (5), the docking holes (10) of the inkjet group are provided with an inkjet tube (6), and the ends of the cleaning tube (5) and the inkjet tube (6) that are in contact with the bottom of the mounting tube (2) are both connected with a second connecting tube (14); A plurality of limit assemblies (7) are evenly arranged on the installation cylinder (2), an adjustment cylinder (3) is arranged on the installation cylinder (2) through the limit assemblies (7), an elastic telescopic member (11) is arranged in the adjustment cylinder (3), the installation cylinder (2) is arranged in the adjustment cylinder (3) through the elastic telescopic member (11), a plurality of first connecting tubes (13) corresponding to the number of docking holes (10) in the inkjet group are arranged in the adjustment cylinder (3), and an elastic sealing ring (12) is arranged on the first connecting tube (13); In an initial state, the first connecting tube (13) is connected to the second connecting tube (14) of the inkjet group via a sealing component (15); In the cleaning state, the regulating cylinder (3) rotates a plurality of first connecting tubes (13) through the limiting assembly (7) to communicate with the second connecting tubes (14) of the cleaning group.

2. The inkjet printing device for use on an industrial robot according to claim 1, characterized in that: The limiting assembly (7) comprises an arc-shaped slide groove (71) provided on the outer wall of the mounting tube (2); a first longitudinal slide groove (72) and a second longitudinal slide groove (73) are respectively provided on both sides of the arc-shaped slide groove (71) on the mounting tube (2); a first sliding block (74) is slidably connected in the first longitudinal slide groove (72); and the first sliding block (74) is fixedly connected to the inner wall of the adjusting tube (3).

3. The inkjet printing device for use on an industrial robot according to claim 2, characterized in that: A limiting ring (9) is fixedly provided on the first connecting tube (13) at the bottom of the elastic sealing ring (12); when the top of the elastic sealing ring (12) is in contact with the bottom of the second connecting tube (14), the limiting ring (9) is in contact with the bottom of the installation tube (2); A connecting tube (8) is provided at the bottom of the first connecting tube (13), and the first connecting tube (13) is connected to the ink nozzle (4) through the connecting tube (8).

4. The inkjet printing device for use on an industrial robot according to claim 3, characterized in that: The inner diameter of the docking hole (10) matches the inner diameter of the elastic sealing ring (12).

5. The inkjet printing device for use on an industrial robot according to claim 4, characterized in that: A sealing assembly (15) is arranged on the first connecting tube (13) above the elastic sealing ring (12); first sliding grooves (16) are symmetrically provided on both sides of the first connecting tube (13); the sealing assembly (15) comprises a second sliding block (152) slidably arranged in the first sliding groove (16); the second sliding block (152) is fixedly connected to the deformable sealing ring (151); and the deformable sealing ring (151) is sleeved on the first connecting tube (13); When the first connecting tube (13) is connected to the second connecting tube (14), the elastic sealing ring (12) is pressed against the bottom of the second connecting tube (14) through the elastic telescopic member (11), and the sealing assembly (15) is in contact with the inner wall of the bottom of the second connecting tube (14).

6. The inkjet printing device for use on an industrial robot according to claim 5, characterized in that: A card interface (17) is provided at the bottom of the second connecting tube (14); the outer diameter of the deformable sealing ring (151) is matched with the inner diameter of the second connecting tube (14); the inner diameter of the card interface (17) is smaller than the outer diameter of the deformable sealing ring (151); and the inner diameter of the card interface (17) is larger than the outer diameter of the first connecting tube (13).

7. The inkjet printing device for use on an industrial robot according to claim 6, characterized in that: The deformable sealing ring (151) is in a truncated cone-shaped structure, and the inside of the deformable sealing ring (151) is a concave structure.

8. The inkjet printing device for use on an industrial robot according to claim 5, characterized in that: The height of the first longitudinal slide groove (72) and the second longitudinal slide groove (73) is greater than the height from the top of the limiting ring (9) to the top of the first connecting pipe (13).

9. The inkjet printing device for use on an industrial robot according to claim 8, characterized in that: The sector angle corresponding to the arc-shaped slide groove (71) is adapted to the angle required for the first connecting tube (13) to rotate from the inkjet group to the cleaning group.

10. The inkjet printing device for use on an industrial robot according to claim 7, characterized in that: The bottom of the first slide groove (16) is located above the bottom inner wall of the second connecting pipe (14), and the top of the concave structure of the deformable sealing ring (151) can fit with the top of the elastic sealing ring (12) after being deformed.

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