Suction nozzle assembly and vacuum pumping device

Abstract

The present invention relates to the field of vacuum nozzles, and discloses a nozzle assembly and a vacuum pumping device. The nozzle assembly includes a pipe joint, a nozzle joint, and a nozzle connected to the nozzle joint. The nozzle joint includes an inner pipe, an outer pipe, and a locking member. The outer surface of the pipe joint is provided with a first recess and can be inserted into the inner pipe. The inner surface of the outer pipe is provided with a second recess. The outer pipe can move between a first position and a second position, so that the locking member moves between a locking position and an unlocking position. In the locking position, the locking member disengages from the second recess and is inserted into the first recess. In the unlocking position, the locking member is inserted into the second recess and disengages from the first recess. Through the above technical solution, the nozzle joint and the pipe joint can be quickly locked and unlocked through the locking member, so that the nozzle can be quickly connected to and disassembled from the vacuum pump, simplifying the operation, improving the efficiency, and facilitating the quick cleaning of each component.

Description

Technical Field

[0001] The present invention relates to the field of vacuum nozzles, and particularly to a nozzle assembly and a vacuum pumping device. Background Art

[0002] With the booming development of the new energy industry, the production capacity of new energy materials is increasing, and the packaging of dust materials such as precursor materials and cathode materials is becoming more and more refined. The automatic packaging machine for precursor materials and cathode materials performs quantitative packaging, and then undergoes vacuum pumping and heat sealing treatment by a vacuum pumping and heat sealing machine to ensure that the performance of the materials does not change and facilitate transportation. The vacuum pumping and heat sealing machine extracts the air in the packaging bag by a vacuum pump to reach a certain vacuum degree, and then performs heat sealing. The nozzles used in the vacuum pumping and heat sealing machine mostly adopt fixed straight-through air extraction nozzles, but during the vacuum pumping process, floating material dust in the air may be uncertainly extracted, which may cause the vacuum pump to enter less material and reduce its service life; it also causes a reduction in the material in the packaging bag, affecting the packaging accuracy and causing material loss.

[0003] Therefore, it is necessary to clean the nozzle regularly. The existing nozzle structure is not convenient for disassembly, which brings great difficulties to the cleaning operation. Summary of the Invention

[0004] The purpose of the present invention is to overcome the problem that the nozzle and the vacuum pump are not convenient for disassembly and cleaning in the prior art.

[0005] To achieve the above purpose, on the one hand, the present invention provides a nozzle assembly, which includes a pipe joint, a nozzle joint, and a nozzle connected to the nozzle joint. The nozzle joint includes an inner pipe, an outer pipe sleeved on the inner pipe, and a locking member movably penetrating the inner pipe horizontally. The pipe joint can be inserted into the inner pipe, and the outer surface is provided with a first recess. The inner surface of the outer pipe is provided with a second recess. The outer pipe can move relative to the inner pipe in the axial direction between a first position and a second position, so that the locking member moves between a locking position and an unlocking position. In the locking position, the locking member disengages from the second recess and inserts into the first recess. In the unlocking position, the locking member inserts into the second recess and disengages from the first recess.

[0006] In some embodiments, a first elastic member is disposed between the locking member and the inner pipe, and a second elastic member is disposed between the inner pipe and the outer pipe.

[0007] In some embodiments, the locking member is U-shaped and includes a first section and two second sections extending in the same direction from both ends of the first section. The inner tube is provided with a main hole near the outer surface and two branch holes near the inner surface. The two branch holes communicate with the main hole. The first section can be received in the main hole, and the two second sections can be received in the branch holes.

[0008] In some embodiments, the first elastic member is disposed between the portion of the inner tube located between the two branch holes and the first section.

[0009] In some embodiments, a receiving groove is provided on the outer surface of the inner tube, a pressing plate inserted into the receiving groove is provided on the inner surface of the outer tube, and the second elastic member is disposed in the receiving groove and elastically acts on the pressing plate in the axial direction.

[0010] In some embodiments, the end surface of the locking member facing the outer tube is formed as a first inclined surface, and the second recess is provided with a second inclined surface that transitions from its bottom surface to the inner surface of the outer tube. The second inclined surface can be attached to the first inclined surface to guide the locking member into or out of the second recess.

[0011] In some embodiments, a flange is provided inside one end of the inner tube connected to the mouthpiece. A first annular groove is provided on the surface of the flange facing the pipe joint, and a first sealing ring that is hermetically engaged with the pipe joint is provided in the first annular groove; and / or, a second annular groove is provided on the outer surface of the pipe joint, and a second sealing ring that is hermetically engaged with the inner tube is provided in the second annular groove.

[0012] In some embodiments, a protruding member is provided on the outer surface of the outer tube.

[0013] In some embodiments, the pipe joint includes a skeleton tube, a lining tube provided on the inner surface of the skeleton tube, and an outer lining tube provided on the outer surface of the skeleton tube.

[0014] In some embodiments, a grille and / or an inclined filter screen angled with its cross-section are provided in the mouthpiece.

[0015] On the other hand, the present solution provides a vacuum pumping device, wherein the vacuum pumping device includes a vacuum pump and the mouthpiece assembly described in the above solution.

[0016] Through the above technical solution, the quick locking and unlocking between the mouthpiece joint and the pipe joint can be achieved through the locking member, so that the quick connection and disassembly of the mouthpiece and the vacuum pump can be realized, the operation is simplified, the efficiency is improved, it is convenient to quickly clean each component, and the problem of poor cleaning effect when backwashing the filter screen is effectively solved.

[0017] Based on the problem that the suction nozzle for powder suction in the lithium battery industry has a slender structure, the traditional suction nozzle has no supporting filter screen, or the filtering area of the supporting filter screen is small, this application adopts a grille and / or an inclined filter screen at an angle to its cross-section to be arranged in the suction nozzle to increase the filtering area. Without affecting the vacuum pumping, the amount of material dust floating in the air being taken away by the air flow can be effectively reduced, while improving the packaging accuracy of the powder and extending the service life of the vacuum pump. Description of the Drawings

[0018] Figure 1 is a partial structural schematic diagram of the suction nozzle assembly described in this solution, where the outer tube is in the first position;

[0019] Figure 2 is a partial structural schematic diagram of the suction nozzle assembly described in this solution, where the outer tube is in the second position;

[0020] Figure 3 is a schematic diagram of the mating state of the locking member on one side of the pipe joint and the suction nozzle joint described in the implementation manner of this solution;

[0021] Figure 4 is a cross-sectional view of the pipe joint described in the implementation manner of this solution;

[0022] Figure 5 is a structural schematic diagram of the suction nozzle described in the implementation manner of this solution.

[0023] Description of the Reference Numerals

[0024] 10 - Pipe joint, 11 - First recess, 12 - Second sealing ring, 13 - Skeleton tube, 14 - Liner tube, 15 - Outer liner tube, 20 - Suction nozzle joint, 21 - Inner tube, 22 - Outer tube, 23 - Second recess, 24 - Protruding member, 25 - First sealing ring, 26 - Pressure plate, 30 - Suction nozzle, 31 - Filter screen, 40 - Locking member, 50 - First elastic member, 60 - Second elastic member. Detailed Description of the Embodiments

[0025] The following will describe in detail the specific embodiments of the present invention with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for the purpose of illustration and explanation of the present invention, and are not intended to limit the present invention.

[0026] In the present invention, unless otherwise stated, the orientation terms such as "upper, lower, left, right" usually refer to the relative positional relationship in the drawings, which is only for the convenience of description and should not be construed as a special limitation to this solution.

[0027] The present invention provides a nozzle assembly, which includes a pipe joint 10, a nozzle joint 20 and a nozzle 30 connected to the nozzle joint 20. One end of the pipe joint 10 can be set at the free end of the vacuum tube on the vacuum pump, and the other end of the pipe joint 10 can be quickly disassembled from the nozzle joint 20. Specifically, the nozzle joint 20 includes an inner tube 21, an outer tube 22 sleeved on the inner tube 21, and a locking member 40 that can movably pass through the inner tube 21 laterally. The pipe joint 10 can be inserted into the inner tube 21 and has a first recessed portion 11 on its outer surface. The inner surface of the outer tube 22 has a second recessed portion 23. The outer tube 22 can move in the axial direction relative to the inner tube 21 in a first position and a second position so that the locking member 40 moves between a locked position and an unlocked position. Please refer to Figure 1 and Figure 3 In the locked position, the locking member 40 is disengaged from the second recess 23 and inserted into the first recess 11, see Figure 2 In the unlocked position, the locking member 40 is inserted into the second recess 23 and disengaged from the first recess 11 .

[0028] refer to Figure 1 and Figure 2 As shown, the nozzle joint 20 includes an inner tube 21 and an outer tube 22, and the locking piece 40 is arranged through the inner tube 21 and can move radially relative to the inner tube 21 to transfer between a locked position and an unlocked position; the outer tube 22 can move axially relative to the inner tube 21, so that the locking piece 40 moves radially relative to the inner tube 21, for example, by the force exerted by the inner surface of the outer tube 22 on the locking piece 40. In particular, the inner surface of the outer tube 22 is provided with a second recessed portion 23. When the second recessed portion 23 is aligned with the position where the locking piece 40 is provided on the inner tube 21, the locking piece 40 moves outward and is inserted into the second recessed portion 23, and the other end is flush with (or even recessed) the inner surface of the inner tube 21, that is, the locking piece 40 is in the unlocked position. When the second recessed portion 23 is staggered with the position where the locking piece 40 is provided on the inner tube 21, the locking piece 40 is pushed forward and disengaged from the second recessed portion 23 and protrudes from the inner surface of the inner tube 21, that is, the locking piece 40 is in the unlocked position.

[0029] refer to Figure 3 and Figure 4 As shown, it shows the structure of the pipe joint 10, and the outer surface of the pipe joint 10 is provided with a first recessed portion 11. Figure 1 and Figure 2The upper end of the nozzle joint 20 shown is inserted and moved to a position where the first recess 11 is aligned with the position where the locking member 40 is provided on the inner tube 21. When the locking member 40 extends inward from the inner tube 21, it can be inserted into the first recess 11, thereby restricting the movement of the pipe joint 10 relative to the nozzle joint 20. When the locking member 40 extends outward from the inner tube 21, the locking member 40 can disengage from the first recess 11 and extend outward into the second recess 23 to unlock the pipe joint 10, allowing the pipe joint 10 to be withdrawn from the nozzle joint 20.

[0030] The pipe joint 10 can be connected to a vacuum pump, and a nozzle 30 is connected to the lower end of the nozzle joint 20. Through the cooperation of the pipe joint 10 and the nozzle joint 20, the connection between the nozzle and the vacuum pump can be achieved.

[0031] In this solution, the locking and unlocking between the nozzle joint and the pipe joint can be achieved quickly through the locking member, so that the quick connection and disassembly of the nozzle and the vacuum pump can be realized, simplifying the operation, improving the efficiency, and facilitating the quick cleaning of each component.

[0032] In addition, a first elastic member 50 is provided between the locking member 40 and the inner tube 21, and a second elastic member 60 is provided between the inner tube 21 and the outer tube 22. Among them, the telescopic direction of the first elastic member 50 is the radial direction perpendicular to the axial direction, and the telescopic direction of the second elastic member 60 is the axial direction. The second elastic member 60 can apply an elastic force to the outer tube 22 from the second position to the first position, and the first elastic member 50 can apply an elastic force to the locking member 40 from the locking position to the unlocking position. Without external interference, the second elastic member 60 causes the outer tube 22 to move to the second position, and at this time the locking member 40 is in the locking position. When it is necessary to insert or withdraw the pipe joint 10, the outer tube 22 is operated to overcome the elastic force of the second elastic member 60 and move from the first position to the second position. The locking member 40 moves from the locking position to the unlocking position under the elastic force of the first elastic member 50. The locking member 40 is inserted into the second recess 23, and the inner end extends out of the inner tube 21 to allow the pipe joint 10 to be inserted or withdrawn. After the pipe joint 10 is inserted in place or withdrawn, the outer tube 22 is released, and the second elastic member 60 causes it to return to the first position, while driving the locking member 40 back to the locking position.

[0033] The first elastic member 50 and the second elastic member 60 can be springs or elastic rubbers, etc.

[0034] The inner tube 21 is made of titanium or PE material, and the relative movement with the locking member 40 made of PE material will not generate metal foreign objects, ensuring that the material quality will not be affected. The outer tube 22 is made of polytetrafluoroethylene (PTFE).

[0035] Among them, the locking member 40 is U-shaped and includes a first section and two second sections extending in the same direction from both ends of the first section. The inner tube 21 is provided with a main hole near the outer surface and two branch holes near the inner surface. The two branch holes communicate with the main hole. The first section can be received in the main hole, and the two second sections can be received in the branch holes. The shapes of the main hole and the two branch holes are also approximately U-shaped to correspond to the shape of the locking member 40, so that the locking member 40 can be received. The portion between the two branch holes is connected to other parts of the inner tube 21, which can limit the further movement of the locking member 40 into the interior of the inner tube 21.

[0036] Furthermore, the first elastic member 50 is disposed between the portion of the inner tube 21 between the two branch holes and the first section. The portion between the two branch holes can carry the first elastic member 50, and the other end of the first elastic member 50 is supported on the first section of the locking member 40.

[0037] In addition, a receiving groove is provided on the outer surface of the inner tube 21, a pressing plate 26 inserted into the receiving groove is provided on the inner surface of the outer tube 22, and the second elastic member 60 is disposed in the receiving groove and elastically acts on the pressing plate 26 in the axial direction. The second elastic member 60 is disposed between the side surface of the receiving groove and the pressing plate 26 to provide an elastic force to the pressing plate 26 and the outer tube 22. In addition, a baffle is connected to the side surface of the receiving groove to limit the outward movement of the second elastic member 60.

[0038] Among them, the end surface of the locking member 40 facing the outer tube 22 is formed as a first inclined surface, and the second recess 23 is provided with a second inclined surface transitioning from its bottom surface to the inner surface of the outer tube 22. The second inclined surface can be fitted to the first inclined surface to guide the locking member 40 into or out of the second recess 23. Refer to Figure 3 As shown, the end surface of the locking member 40 at the end extending outward from the inner tube 21 is a first inclined surface, and the second recess 23 of the outer tube 22 includes a second inclined surface. When the locking member 40 disengages from or enters the second recess 23, it needs to pass through the second inclined surface. The second inclined surface can be fitted to the first inclined surface to guide the movement of the locking member 40. In particular, when the outer tube 22 moves from the second position to the first position, the locking member 40 gradually disengages from the second recess 23, and the second inclined surface can act on the first inclined surface to provide a force directed from the outside to the inside, so that the locking member 40 moves inward to the locking position.

[0039] In addition, a flange 27 is provided inside one end of the inner tube 21 connected to the mouthpiece. A first annular groove is provided on the surface of the flange 27 facing the pipe joint 10, and a first sealing ring 25 that is hermetically engaged with the pipe joint 10 is provided in the first annular groove; and / or, a second annular groove is provided on the outer surface of the pipe joint 10, and a second sealing ring 12 that is hermetically engaged with the inner tube 21 is provided in the second annular groove. On the one hand, the first sealing ring 25 is provided on the flange 27. When the pipe joint 10 is inserted into the inner tube 21 and engaged with the flange 27, sealing can be achieved through the first sealing ring 25. On the other hand, the second sealing ring 12 is provided on the outer periphery of the pipe joint 10, and sealing between the outer periphery of the pipe joint 10 and the inner periphery of the inner tube 21 can be achieved. Through the above double sealing, the sealing performance between the pipe joint 10 and the mouthpiece joint 20 can be ensured.

[0040] Among them, a protruding member 24 is provided on the outer surface of the outer tube 22. The protruding member 24 is convenient for holding and pressing, and is convenient for operating the outer tube 22 so that the outer tube 22 moves axially relative to the inner tube 21.

[0041] Among them, the pipe joint 10 includes a skeleton tube 13, a lining tube 14 provided on the inner surface of the skeleton tube 13, and an outer lining tube 15 provided on the outer surface of the skeleton tube 13. The skeleton tube 13 can be made of metal, such as stainless steel, etc., and the lining tube 14 and the outer lining tube 15 can be made of polytetrafluoroethylene (PTFE).

[0042] Among them, a grille and / or an inclined filter screen 31 that forms an angle with its cross-section are provided in the mouthpiece 30. The lower end of the inner tube 21 can be formed in a tapered shape, and the mouthpiece 30 is connected to the lower end of the inner tube 21, for example, by screwing or welding. Refer to Figure 5 As shown, a filter screen 31 is provided in the mouthpiece 30. The filter screen 31 extends along a plane, and this plane forms an angle with the cross-section of the mouthpiece 30 to increase the area of the filter screen 31. The filter screen 31 can block materials from passing through the mouthpiece 30. The filter screen 31 can be a PE (polyethylene) mesh or a sintered mesh made of titanium metal. The filter screen 31 can form filter holes of 0.3um. In addition, a grille is provided in the mouthpiece 30, and the grille can be located at the entrance to block material particles from entering the mouthpiece 30. The filter screen 31 and the grille can be cleaned by back blowing with compressed air.

[0043] It can be understood that the cross-sections of the pipe joint 10, the mouthpiece joint 20, and the mouthpiece 30 in this solution can be circular, quadrilateral, or other cross-sectional shapes. The axial direction is its length direction, and the radial direction can be understood as the lateral direction perpendicular to the axial direction and pointing from the center to the outside.

[0044] On the other hand, the present solution provides a vacuum pumping device, wherein the vacuum pumping device includes a vacuum pump and the nozzle assembly described in the above solution. The pipe joint 10 is connected to the vacuum pump. The quick installation and disassembly of the pipe joint 10 and the nozzle joint 20 can achieve the quick installation and disassembly of the nozzle 30 and the vacuum pump, facilitating the cleaning of the nozzle 30.

[0045] The preferred embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited thereto. Within the technical concept scope of the present invention, various simple modifications can be made to the technical solutions of the present invention, including the combination of each specific technical feature in any suitable manner. To avoid unnecessary repetition, the present invention will not separately describe various possible combination methods. However, these simple modifications and combinations should equally be regarded as the content disclosed by the present invention and fall within the protection scope of the present invention.

Claims

1. A mouthpiece assembly, characterized in that, It includes a pipe joint (10), a nozzle joint (20), and a nozzle (30) connected to the nozzle joint (20). The nozzle joint (20) includes an inner pipe (21), an outer pipe (22) sleeved on the inner pipe (21), and a locking member (40) movably penetrating the inner pipe (21) horizontally. The pipe joint (10) can be inserted into the inner pipe (21), and its outer surface is provided with a first recess (11). The inner surface of the outer pipe (22) is provided with a second recess (23). The outer pipe (22) can move axially relative to the inner pipe (21) between a first position and a second position, so that the locking member (40) moves between a locking position and an unlocking position. In the locking position, the locking member (40) disengages from the second recess (23) and inserts into the first recess (11). In the unlocking position, the locking member (40) inserts into the second recess (23) and disengages from the first recess (11).

2. The mouthpiece assembly according to claim 1, wherein, A first elastic member (50) is provided between the locking member (40) and the inner pipe (21), and a second elastic member (60) is provided between the inner pipe (21) and the outer pipe (22).

3. The mouthpiece assembly according to claim 2, wherein, The locking member (40) is U-shaped and includes a first section and two second sections extending in the same direction from both ends of the first section. The inner pipe (21) is provided with a main hole near the outer surface and two branch holes near the inner surface. The two branch holes communicate with the main hole. The first section can be accommodated in the main hole, and the two second sections can be accommodated in the branch holes.

4. The nozzle assembly according to claim 3, characterized in that, The first elastic member (50) is provided between the part of the inner pipe (21) between the two branch holes and the first section.

5. The mouthpiece assembly according to claim 2, wherein, The outer surface of the inner pipe (21) is provided with a receiving groove, and the inner surface of the outer pipe (22) is provided with a pressing plate (26) inserted into the receiving groove. The second elastic member (60) is provided in the receiving groove and elastically acts on the pressing plate (26) in the axial direction.

6. The mouthpiece assembly according to claim 1, characterized in that The end face of the locking member (40) facing the outer pipe (22) is formed as a first inclined surface, and the second recess (23) is provided with a second inclined surface transitioning from its bottom surface to the inner surface of the outer pipe (22). The second inclined surface can be attached to the first inclined surface to guide the locking member (40) into or out of the second recess (23).

7. The mouthpiece assembly according to claim 1, wherein A flange (27) is provided inside the end of the inner pipe (21) connected to the nozzle. The surface of the flange (27) facing the pipe joint (10) is provided with a first annular groove, and a first sealing ring (25) hermetically engaged with the pipe joint (10) is provided in the first annular groove; and / or, the outer surface of the pipe joint (10) is provided with a second annular groove, and a second sealing ring (12) hermetically engaged with the inner pipe (21) is provided in the second annular groove.

8. The mouthpiece assembly according to claim 1, characterized in that The outer surface of the outer pipe (22) is provided with a protruding member (24).

9. The mouthpiece assembly according to claim 1, wherein A grille and / or an inclined filter screen (31) angled with its cross-section are provided in the nozzle (30).

10. A vacuum pumping device, characterized in that, The vacuum pumping device includes a vacuum pump and the nozzle assembly according to any one of claims 1-9.

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