Embedded vacuum nozzle structure and vacuumizing method thereof

Abstract

The application discloses an embedded vacuum nozzle structure and a vacuumizing method thereof, and can drive the linkage to drive the clamping piece to be separated from the clamping groove outside the connecting block by pressing the pressing ring when the air tightness of the vacuum nozzle is reduced, and then the connecting block and the connecting pipe can be conveniently taken out from the ring shell, so that the staff can maintain and replace the connecting pipe and the piston assembly, and the replacement and maintenance of the vacuum nozzle can be realized without taking the vacuum nozzle out of the vacuum bag as a whole.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of vacuum nozzles and relates to an embedded vacuum nozzle structure and a vacuumizing method thereof. BACKGROUND

[0002] Most of existing composite material parts need to be sealed when being pre-extracted and cured, and a vacuum nozzle is connected to a vacuum air source to extract and discharge internal air to ensure the quality of the parts. However, the existing vacuum nozzles are of an integral structure, and the vacuum nozzle is placed in a sealed bag in advance when the sealed bag is made, and then the vacuum nozzle is extended out of the sealed bag by cutting a hole in the sealed bag, and the vacuum nozzle is fixed on the vacuum bag by an additional bolt for subsequent vacuumizing operation. After long-term use, some parts of the vacuum nozzle may be damaged, thereby reducing the air tightness of the sealed bag, and the vacuum nozzle is inconvenient to repair and replace and is troublesome to disassemble and assemble. SUMMARY

[0003] The application aims to provide an embedded vacuum nozzle structure and a vacuumizing method thereof, which can realize the disassembly and replacement of the connecting part of the vacuum nozzle without taking the vacuum nozzle out of the vacuum bag when the air tightness of the vacuum nozzle is reduced, thereby improving the efficiency of vacuumizing operation.

[0004] The application is achieved by the following technical scheme:

[0005] The embedded vacuum nozzle structure comprises a connecting pipe, the inside of the connecting pipe is provided with a piston assembly that is opened or closed along with the change of air pressure, the outside of the connecting pipe is provided with a connecting block, the outside of the connecting block is provided with a ring shell, the inner ring surface of the ring shell is provided with a clamping piece that slides along the radial direction of the connecting pipe, and the outer side wall of the connecting block is provided with a clamping groove that is clamped with the clamping piece; the top of the ring shell is provided with a pressing ring that slides along the axial direction of the connecting pipe, the bottom end of the pressing ring extends to the inside of the ring shell and is connected with one side of the clamping piece through a linkage, and the pressing ring slides along the axial direction of the connecting pipe to drive the linkage to drive the clamping piece to slide along the radial direction of the connecting pipe.

[0006] One end of the connecting pipe is connected with the vacuum bag, and the other end of the connecting pipe is connected with the vacuumizing machine. When the vacuumizing machine is started, the air in the connecting pipe is extracted, so that the air pressure on the side of the piston assembly close to the vacuumizing machine is smaller than the air pressure on the side of the piston assembly close to the vacuum bag. At this time, the piston assembly moves away from the vacuum bag under the action of the pressure difference to open the connecting pipe, and then the air in the vacuum bag is extracted by the vacuumizing machine. After the vacuum bag reaches the vacuum state, the vacuumizing machine is stopped, and the piston assembly is reset to close the connecting pipe to prevent external air from entering the vacuum bag through the connecting pipe.

[0007] The vacuum bag is vacuumized and kept for a period of time, and the vacuum degree of the vacuum bag is detected. If the vacuum degree of the vacuum bag reaches the standard after a period of time, the vacuumizing operation is completed; if the vacuum degree of the vacuum bag does not reach the standard after a period of time, it indicates that external air enters the vacuum bag through the connecting pipe. At this time, the axial moving pressing ring is moved to drive the clamping piece to move away from the connecting block through the linkage, so that the clamping piece is detached from the clamping groove, and then the connecting pipe can be disassembled as a whole. Then, the connecting pipe and the piston assembly are subjected to air tightness detection to discharge the air leakage point.

[0008] In order to better realize the present application, further, the clamping piece comprises a sliding plate, a first spring and a clamping rod, the sliding plate is arranged inside the ring shell and slides along the radial direction of the connecting pipe, one end of the sliding plate close to the connecting block is provided with the clamping rod, the end of the clamping rod penetrates through the inner ring surface of the ring shell and is arranged corresponding to the clamping groove, and the top of the clamping rod is hinged to the linkage.

[0009] In order to better realize the present application, further, a first T-shaped groove is arranged on the inner bottom surface of the ring shell along the radial direction of the connecting pipe, and a first T-shaped block is arranged on the bottom of the sliding plate and is connected with the first T-shaped groove in a sliding fit.

[0010] In order to better realize the present application, further, the linkage comprises a connecting rod, a horizontal plate and a pressing rod, the horizontal plate is arranged inside the ring shell and slides along the axial direction of the connecting pipe, the top of the horizontal plate is provided with the pressing rod, the pressing rod penetrates through the top surface of the ring shell and is connected with the bottom of the pressing ring, the bottom of the horizontal plate is hinged to the first end of the connecting rod, and the second end of the connecting rod is hinged to the top of the clamping rod.

[0011] In order to better realize the present application, further, a second T-shaped groove is arranged on the side wall of the ring shell inside and close to the connecting block along the axial direction of the connecting pipe, and a second T-shaped block is arranged on one end of the horizontal plate close to the connecting block and is connected with the second T-shaped groove in a sliding fit.

[0012] In order to better realize the present application, further, the piston assembly comprises a fixed plate, a telescopic sleeve, a plug piston and a second spring, the fixed plate is arranged inside the connecting pipe, the center of the fixed plate is provided with a gas port, the telescopic sleeve is coaxially arranged above the fixed plate, one end of the telescopic sleeve close to the gas port is provided with the plug piston matched with the gas port, the outside of the telescopic sleeve is sleeved with the second spring, and one end of the second spring is in abutment with the plug piston.

[0013] In order to better realize the present application, further, a conical frustum gas port is arranged at the center of the fixed plate, and the plug piston is a conical frustum piston.

[0014] In order to better realize the present application, further, the bottom of the ring shell is provided with a mounting plate, the center of the mounting plate is provided with a mounting hole for the connecting pipe to pass through, and a rubber ring is arranged between the hole wall of the mounting hole and the outer pipe wall of the connecting pipe.

[0015] A vacuumizing method is realized based on the embedded vacuum nozzle structure, comprising the following steps:

[0016] Step 1, press the pressing ring downward to drive the clamping member to slide radially and retract to the inside of the ring shell, and fit the connecting block into the center hole of the ring shell; lift the pressing ring upward to drive the clamping member to slide radially and extend to the clamping groove on the outer side wall of the connecting block, so as to fix the connecting block and the connecting pipe;

[0017] Step 2, set the vacuum bag on the bottom end of the connecting pipe, and connect the vacuumizing machine to the top end of the connecting pipe; suck the air in the connecting pipe through the vacuumizing machine, so that the air pressure at the top of the piston assembly is less than the air pressure at the bottom of the piston assembly, at this time, the piston assembly moves upward to open, so as to perform the vacuumizing operation on the vacuum bag;

[0018] Step 3, close the vacuumizing machine, so that the air pressure at the top of the piston assembly is greater than the air pressure at the bottom of the piston assembly, at this time, the piston assembly moves upward to close; stand still to detect the vacuum degree of the vacuum bag, if the vacuum degree meets the standard, the vacuumizing operation is completed, if the vacuum degree does not meet the standard, turn to the step;

[0019] Step 4, press the pressing ring downward to drive the clamping member to slide radially and retract to the inside of the ring shell, and then take out the connecting block from the center hole of the ring shell, and then check the air tightness of the connecting pipe and the piston assembly.

[0020] Compared with the prior art, the present application has the following advantages and beneficial effects:

[0021] When the air tightness of the vacuum nozzle is reduced, the pressing ring is pressed downward to drive the linkage member to drive the clamping member to disengage from the clamping groove on the outer side of the connecting block, so that the connecting block and the connecting pipe can be conveniently taken out of the ring shell, so that the staff can maintain and replace the connecting pipe and the piston assembly, and the replacement and maintenance of the vacuum nozzle can be realized without taking out the vacuum nozzle from the vacuum bag as a whole. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a perspective view of the embedded vacuum nozzle structure;

[0023] Figure 2 It is a top view of the embedded vacuum nozzle structure;

[0024] Figure 3 It is a A-A sectional view of Figure 2

[0025] Figure 4 ​It is the installation schematic diagram of the clamping rod;

[0026] Figure 5 It is the installation schematic diagram of the connecting pipe.

[0027] Wherein: 1, mounting plate; 2, mounting hole; 3, connecting pipe; 4, connecting block; 5, clamping groove; 6, ring shell; 7, sliding plate; 8, first spring; 9, clamping rod; 10, connecting rod; 11, cross plate; 12, pressing rod; 13, pressing ring; 14, fixed plate; 15, conical air port; 16, strip plate; 17, telescopic sleeve; 18, plug piston; 19, second spring; 20, first T-shaped block; 21, first T-shaped groove; 22, second T-shaped block; 23, second T-shaped groove; 24, radial through hole; 25, axial sliding hole; 26, pipe cover; 27, rubber ring; 28, rubber sleeve. DETAILED DESCRIPTION

[0028] The following detailed description is exemplary in nature and is intended to provide further description of the application. All of the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise specifically defined.

[0029] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0030] For the convenience of description, if the terms "upper", "lower", "left", "right" appear in the present application, they only mean consistent with the upper, lower, left and right directions of the drawings themselves, and do not limit the structure, but only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0031] Part of the term explanation: the terms "mounting", "connecting", "connecting", "fixing" and the like in the present application should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements, or the interaction relationship between two elements, for those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] Example 1:

[0033] This embodiment presents an embedded vacuum nozzle structure, such as... Figures 1-5 As shown, the device includes a connecting pipe 3, inside which is a piston assembly that opens or closes according to changes in air pressure. A connecting block 4 is fitted outside the connecting pipe 3, and an annular shell 6 is fitted outside the connecting block 4. A locking member is slidably disposed on the inner annular surface of the annular shell 6 along the radial direction of the connecting pipe 3. A locking groove 5 corresponding to the locking member is disposed on the outer side wall of the connecting block 4. A pressure ring 13 is slidably disposed on the top of the annular shell 6 along the axial direction of the connecting pipe 3. The bottom end of the pressure ring 13 extends into the interior of the annular shell 6 and is connected to one side of the locking member through a linkage. The pressure ring 13 slides along the axial direction of the connecting pipe 3 to drive the linkage to drive the locking member to slide radially along the connecting pipe 3.

[0034] A connecting block 4 is welded or threaded onto the outer bottom of the connecting pipe 3. An external thread is provided on the outer top wall of the connecting pipe 3. A pipe cap 26 is screwed onto the top opening of the connecting pipe 3 through the external thread, thereby preventing external debris from entering the interior of the connecting pipe 3 during non-working hours. A strip plate 16 is provided inside the connecting pipe 3, and a piston assembly is installed at the bottom of the strip plate 16.

[0035] The annular shell 6 has a central hole at its center that mates with the outer contour of the connecting block 4. Four sets of locking components, capable of sliding radially along the connecting pipe 3, are evenly spaced along the inner annular surface of the annular shell 6. Simultaneously, four sets of slots 5 are provided on the outer wall of the connecting block 4 corresponding to the four sets of locking components. A pressure ring 13 is slidably mounted on the top of the annular shell 6 along the axial direction of the connecting pipe 3. The bottom of the pressure ring 13 is connected to the locking components via a linkage. When the pressure ring 13 is pressed down, it drives the linkage to move the locking components away from the connecting block 4, causing them to disengage from the slots 5. At this point, the connecting block 4 and the connecting pipe 3 can be removed from the central hole of the annular shell 6. When the pressure ring 13 is pulled up, it drives the linkage to move the locking components closer to the connecting block 4, causing them to engage with the slots 5. At this point, the connecting block 4 and the connecting pipe 3 are fixed in the central hole of the annular shell 6.

[0036] The piston assembly inside connecting pipe 3 can open or close the connecting pipe 3 under air pressure. The bottom end of connecting pipe 3 is connected to the vacuum bag, and the top end of connecting pipe 3 is connected to the vacuum pump. When the vacuum pump is started, the air at the top of the piston assembly in connecting pipe 3 is extracted, making the air pressure at the top of the piston assembly lower than the air pressure at the bottom of the piston assembly. At this time, the piston assembly moves upward under the action of the pressure difference to open the connecting pipe 3, ensuring that the vacuum pump can extract the air from the vacuum bag through the connecting pipe 3.

[0037] After the vacuum bag is pumped to a vacuum state, the vacuum pump is turned off. At this time, the piston assembly moves downward to close the connecting pipe 3, so as to prevent external air from entering the vacuum bag through the connecting pipe 3. The vacuum degree of the vacuum bag is checked. If the vacuum degree of the vacuum bag does not meet the standard, it indicates that the air tightness of the connecting pipe 3 or the piston assembly is insufficient, causing external air to enter the vacuum bag through the connecting pipe 3. At this time, the pressing ring 13 is pressed down, the pressing ring 13 drives the linkage to move the clamping member away from the connecting block 4, so that the clamping member is disengaged from the clamping groove 5. At this time, the connecting block 4 and the connecting pipe 3 can be taken out of the center hole of the ring shell 6, and then the air tightness of the connecting pipe 3 and the piston assembly is detected, and the components with air leakage points are maintained or replaced.

[0038] Embodiment 2

[0039] An embedded vacuum nozzle structure is improved based on Embodiment 1, as shown in Figure 3 The clamping member includes a sliding plate 7, a first spring 8, and a clamping rod 9. The sliding plate 7 is arranged inside the ring shell 6 along the radial direction of the connecting pipe 3. The end of the sliding plate 7 close to the connecting block 4 is provided with the clamping rod 9. The end of the clamping rod 9 penetrates through the inner ring surface of the ring shell 6 and is arranged corresponding to the clamping groove 5. The top of the clamping rod 9 is hinged to the linkage. The end of the sliding plate 7 away from the connecting block 4 is provided with the first spring 8.

[0040] A radial through hole 24 for the radial sliding of the clamping rod 9 is arranged on the hole wall of the center hole of the ring shell 6. When the pressing ring 13 is pressed down, the pressing ring 13 drives the linkage to press down, so that the linkage drives the sliding plate 7 and the clamping rod 9 to slide away from the connecting block 4, so that the end of the clamping rod 9 is disengaged from the clamping groove 5 on the side wall of the connecting block 4. At this time, the first spring 8 is in a compressed state. When the pressing force of the pressing ring 13 is removed, the first spring 8 rebounds toward the connecting block 4, thereby driving the sliding plate 7 and the clamping rod 9 to slide toward the connecting block 4. The end of the clamping rod 9 enters the clamping groove 5 and is clamped with the clamping groove 5. At the same time, the pressing ring 13 also rises upward under the reaction force of the linkage to reset.

[0041] Further, a first T-shaped groove 21 is arranged on the inner bottom surface of the ring shell 6 along the radial direction of the connecting pipe 3. The bottom of the sliding plate 7 is provided with a first T-shaped block 20 which is connected with the first T-shaped groove 21 in a sliding manner. Through the sliding connection of the first T-shaped groove 21 and the first T-shaped block 20, it can be ensured that the sliding plate 7 and the clamping rod 9 slide strictly along the radial direction of the connecting pipe 3, thereby ensuring that the end of the clamping rod 9 can smoothly enter the clamping groove 5.

[0042] The other parts of this embodiment are the same as those of Embodiment 1, and thus will not be described again.

[0043] Embodiment 3

[0044] An embedded vacuum nozzle structure is improved based on Embodiment 1 or 2, as shown inFigure 3 As shown, the linkage includes a connecting rod 10, a horizontal plate 11, and a pressure rod 12. The horizontal plate 11 is slidably disposed inside the annular shell 6 along the axial direction of the connecting pipe 3. The pressure rod 12 is disposed on the top of the horizontal plate 11. The pressure rod 12 passes through the top surface of the annular shell 6 and is connected to the bottom of the pressure ring 13. The bottom of the horizontal plate 11 is hinged to the first end of the connecting rod 10, and the second end of the connecting rod 10 is hinged to the top of the locking rod 9.

[0045] An axial sliding hole 25 is provided on the top surface of the ring shell 6 for the axial sliding of the pressure rod 12. When the pressure ring 13 is pressed down, the pressure rod 12 drives the horizontal plate 11 to slide downward along the axial direction of the connecting pipe 3, and then drives the locking rod 9 to slide away from the connecting block 4 through the connecting rod 10. When the downward pressure of the pressure ring 13 is removed, the first spring 8 rebounds towards the connecting block 4, and then drives the sliding plate 7 and the locking rod 9 to slide towards the connecting block 4. The end of the locking rod 9 enters the locking groove 5 and engages with the locking groove 5. At the same time, the pressure ring 13 also rises upward and resets under the reaction force of the connecting rod 10.

[0046] Furthermore, a second T-shaped groove 23 is provided on the inner side wall of the annular shell 6 near the connecting block 4 along the axial direction of the connecting pipe 3, and a second T-shaped block 22 is provided at one end of the horizontal plate 11 near the connecting block 4, which is slidably connected to the second T-shaped groove 23. Through the sliding engagement of the second T-shaped groove 23 and the second T-shaped block 22, it can be ensured that the horizontal plate 11 slides strictly along the axial direction of the connecting pipe 3.

[0047] The other parts of this embodiment are the same as those in Embodiment 1 or 2, so they will not be described again.

[0048] Example 4:

[0049] An embedded vacuum nozzle structure, improved based on any one of embodiments 1-3, such as... Figure 3 As shown, the piston assembly includes a fixed plate 14, a telescopic sleeve 17, a plug piston 18, and a second spring 19. The fixed plate 14 is disposed inside the connecting pipe 3, and an air port is disposed at the center of the fixed plate 14. The telescopic sleeve 17 is coaxially disposed above the fixed plate 14. A plug piston 18 matching the air port is disposed at one end of the telescopic sleeve 17 near the air port. The second spring 19 is sleeved on the outside of the telescopic sleeve 17, and one end of the second spring 19 abuts against the plug piston 18.

[0050] A strip plate 16 is installed inside the connecting pipe 3. A telescopic sleeve 17 is installed at the bottom of the strip plate 16. The top end of the second spring 19 is connected to the bottom of the strip plate 16, and the bottom end of the second spring 19 abuts against the top of the plug piston 18. When the vacuum pump is working, the air pressure at the top of the plug piston 18 is lower than the air pressure at its bottom. At this time, the plug piston 18 moves upward under the action of the pressure difference to open the air port on the fixed plate 14. At the same time, the second spring 19 is in a compressed state.

[0051] After the vacuum pump stops, the second spring 19 drives the plug piston 18 to move downward, causing the plug piston 18 to close the air port on the fixed plate 14 again.

[0052] Furthermore, a frustum-shaped air port 15 is provided at the center of the fixing plate 14, and the plug piston 18 is a frustum-shaped piston. A rubber sleeve 28 is provided on the surface of the plug piston 18 to further improve the airtightness of the plug piston 18 and the frustum-shaped air port 15.

[0053] The other parts of this embodiment are the same as any one of embodiments 1-3, so they will not be described again.

[0054] Example 5:

[0055] An embedded vacuum nozzle structure, improved based on any one of embodiments 1-4, such as... Figure 1 The bottom of the annular shell 6 shown is provided with a mounting plate 1. A mounting hole 2 for the connecting pipe 3 to pass through is provided at the center of the mounting plate 1. A rubber ring 27 is provided between the wall of the mounting hole 2 and the outer wall of the connecting pipe 3. By providing the rubber ring 27, the airtightness between the connecting pipe 3 and the mounting plate 1 can be ensured, preventing external air from entering the vacuum bag through the gap between the connecting pipe 3 and the mounting plate 1.

[0056] The other parts of this embodiment are the same as any one of embodiments 1-4, so they will not be described again.

[0057] Example 7:

[0058] A vacuuming method, based on an embedded vacuum nozzle structure, includes the following steps:

[0059] Step 1: Press down on the pressure ring 13 to drive the locking part to slide radially back into the inside of the ring shell 6, and install the connecting block 4 into the center hole of the ring shell 6; lift the pressure ring 13 upward to drive the locking part to slide radially out into the slot 5 on the outer side wall of the connecting block 4, thereby fixing the connecting block 4 and the connecting pipe 3.

[0060] Step 2, a vacuum bag is sleeved at the bottom end of the connecting pipe 3, and a vacuum pump is connected at the top end of the connecting pipe 3; the air in the connecting pipe 3 is sucked by the vacuum pump, so that the air pressure at the top of the piston assembly is less than the air pressure at the bottom of the piston assembly, at this time the piston assembly moves upward to open, and the vacuum bag is vacuumized;

[0061] Step 3, the vacuum pump is turned off, so that the air pressure at the top of the piston assembly is greater than the air pressure at the bottom of the piston assembly, at this time the piston assembly moves upward to close; the vacuum degree of the vacuum bag is detected, if the vacuum degree meets the standard, the vacuumizing operation is completed, if the vacuum degree does not meet the standard, step 4 is entered;

[0062] Step 4, the pressing ring 13 is pressed downward, the clamping member is slid radially to retract into the inside of the ring shell 6, the connecting block 4 is taken out from the center hole of the ring shell 6, and then the air tightness of the connecting pipe 3 and the piston assembly is checked.

[0063] The above is only the preferred embodiment of the present application, and does not limit the present application in any form, any simple modification and equivalent change of the above embodiment according to the technical essence of the present application falls within the protection scope of the present application.

Claims

1. An embedded vacuum nozzle structure, comprising a connecting tube (3), characterized in that, The connecting pipe (3) is equipped with a piston assembly that opens or closes according to changes in air pressure. The connecting pipe (3) is fitted with a connecting block (4) on the outside. The connecting block (4) is fitted with an annular shell (6) on the outside. A locking member is slidably arranged on the inner annular surface of the annular shell (6) along the radial direction of the connecting pipe (3). A locking groove (5) corresponding to the locking member is provided on the outer side wall of the connecting block (4). A pressure ring (13) is slidably arranged on the top of the annular shell (6) along the axial direction of the connecting pipe (3). The bottom end of the pressure ring (13) extends into the interior of the annular shell (6) and is connected to one side of the locking member through a linkage. The pressure ring (13) slides along the axial direction of the connecting pipe (3) to drive the linkage to drive the locking member to slide along the radial direction of the connecting pipe (3). The engaging component includes a sliding plate (7), a first spring (8), and a locking rod (9). The sliding plate (7) is slidably disposed inside the annular shell (6) along the radial direction of the connecting pipe (3). A locking rod (9) is provided at one end of the sliding plate (7) near the connecting block (4). The end of the locking rod (9) passes through the inner annular surface of the annular shell (6) and is correspondingly disposed with the locking groove (5). The top of the locking rod (9) is hinged to the linkage component. A first spring (8) is provided at one end of the sliding plate (7) away from the connecting block (4). The inner bottom surface of the ring shell (6) is provided with a first T-shaped groove (21) along the radial direction of the connecting pipe (3), and the bottom of the slide plate (7) is provided with a first T-shaped block (20) that is slidably connected to the first T-shaped groove (21). The linkage includes a connecting rod (10), a horizontal plate (11), and a pressure rod (12). The horizontal plate (11) is slidably disposed inside the annular shell (6) along the axial direction of the connecting pipe (3). A pressure rod (12) is disposed on the top of the horizontal plate (11). The pressure rod (12) passes through the top surface of the annular shell (6) and is connected to the bottom of the pressure ring (13). The bottom of the horizontal plate (11) is hinged to the first end of the connecting rod (10), and the second end of the connecting rod (10) is hinged to the top of the locking rod (9). The inner side wall of the ring shell (6) near the connecting block (4) is provided with a second T-shaped groove (23) along the axial direction of the connecting pipe (3). The end of the horizontal plate (11) near the connecting block (4) is provided with a second T-shaped block (22) that is slidably connected to the second T-shaped groove (23).

2. The embedded vacuum nozzle structure according to claim 1, characterized in that, The piston assembly includes a fixed plate (14), a telescopic sleeve (17), a plug piston (18), and a second spring (19). The fixed plate (14) is located inside the connecting pipe (3), and an air port is located at the center of the fixed plate (14). The telescopic sleeve (17) is coaxially arranged above the fixed plate (14). A plug piston (18) matching the air port is arranged at one end of the telescopic sleeve (17) near the air port. The second spring (19) is sleeved on the outside of the telescopic sleeve (17), and one end of the second spring (19) abuts against the plug piston (18).

3. The embedded vacuum nozzle structure according to claim 2, characterized in that, The fixed plate (14) has a frustum-shaped air port (15) at its center, and the plug piston (18) is a frustum-shaped piston.

4. An embedded vacuum nozzle structure according to any one of claims 1-3, characterized in that, The bottom of the ring shell (6) is provided with an installation plate (1), and the center of the installation plate (1) is provided with an installation hole (2) for the connecting pipe (3) to pass through. A rubber ring (27) is provided between the hole wall of the installation hole (2) and the outer wall of the connecting pipe (3).

5. A vacuuming method, implemented based on the embedded vacuum nozzle structure according to any one of claims 1-4, characterized in that, Includes the following steps: Step 1: Press down on the pressure ring (13) to drive the locking part to slide radially back into the inside of the ring shell (6), and install the connecting block (4) into the center hole of the ring shell (6); lift up the pressure ring (13) to drive the locking part to slide radially out into the slot (5) on the outer side wall of the connecting block (4), thereby fixing the connecting block (4) and the connecting pipe (3); Step 2: Place a vacuum bag on the bottom end of the connecting tube (3) and connect a vacuum pump to the top end of the connecting tube (3); use the vacuum pump to draw air from the connecting tube (3) so that the air pressure at the top of the piston assembly is less than the air pressure at the bottom of the piston assembly. At this time, the piston assembly moves upward to open and perform vacuuming operation on the vacuum bag. Step 3: Turn off the vacuum pump so that the air pressure at the top of the piston assembly is greater than the air pressure at the bottom of the piston assembly. At this time, the piston assembly moves upward to close. Let it stand and check the vacuum level of the vacuum bag. If the vacuum level meets the standard, the vacuuming operation is completed. If the vacuum level does not meet the standard, proceed to step 4. Step 4: Press down on the pressure ring (13) to drive the locking part to slide radially back into the inside of the ring shell (6), remove the connecting block (4) from the center hole of the ring shell (6), and then check the airtightness of the connecting pipe (3) and piston assembly.

Images