Vacuum pump fluid pipeline sealing connection structure

Abstract

The invention discloses a vacuum pump fluid pipeline sealing connection structure, which relates to the technical field of pipeline connection and comprises a hard pipe, a flexible pipe, a connection mechanism and a sealing mechanism. The connecting mechanism and the sealing mechanism are arranged, the connector is connected with the hard pipe, the two hoops are connected to the outer wall of the first butt joint plate and the outer wall of the second butt joint plate in a sleeving mode, and the hard pipe and the connector are positioned; the hose is connected to the outer wall of the connector in a sleeving mode, the clamping blocks are displaced and inserted into the clamping grooves, and the hose and the connector are fixed; the rotating ring rotates to drive the extrusion block to move to press the hose on the outer wall of the connector, so that the sealing performance between the connector and the hose is improved; and the rotating ring rotates to drive the extrusion rod to move to extrude the second butt-joint plate, and the second butt-joint plate is tightly attached to the first butt-joint plate, so that the sealing performance between the hard pipe and the connector is improved, and connection and sealing operation between the hard pipe and the hose are facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline connection, and specifically to a sealed connection structure for a vacuum pump fluid pipeline. Background Art

[0002] A vacuum pump refers to a device or equipment that uses mechanical, physical, chemical, or physical-chemical methods to evacuate a container to obtain a vacuum. In a vacuum pump pipeline system, the sealed connection between a hard pipe and a flexible pipe is a key technical link. If not properly handled, it is likely to cause leakage problems, affecting the vacuum degree and stability of the system.

[0003] In the prior art, when connecting a flexible pipe and a hard pipe, the flexible pipe is prone to deformation under force, resulting in leakage at the connection, thereby affecting the sealing performance of the pipeline. In order to achieve the purpose of facilitating the sealed connection of the flexible pipe, a sealed connection structure for a vacuum pump fluid pipeline is provided. Summary of the Invention

[0004] The purpose of the present invention is to provide a sealed connection structure for a vacuum pump fluid pipeline in order to achieve the purpose of facilitating the sealed connection of the flexible pipe.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A sealed connection structure for a vacuum pump fluid pipeline, including a hard pipe and a flexible pipe. The hard pipe and the flexible pipe are connected through a connection mechanism, and the hard pipe and the flexible pipe are sealed through a sealing mechanism; The connection mechanism includes a connection head. The connection head is arranged between the hard pipe and the flexible pipe. One end of the hard pipe facing the connection head is fixedly connected with a first docking plate. One end of the connection head facing the hard pipe is fixedly connected with a second docking plate. A sealing ring is arranged between the first docking plate and the second docking plate. Two pipe clamps are sleeved on the outer walls of the first docking plate and the second docking plate. Connecting plates are symmetrically and fixedly connected to both sides of the pipe clamp. Through holes are opened on the outer walls of the connecting plates. Bolts are slidably connected to the inner walls of the through holes. Nuts are threadedly connected to the outer walls of the bolts.

[0006] As a further solution of the present invention: The connection mechanism further includes a raised ring. The raised ring is fixedly connected to the outer wall of the connection head. A clamping groove is opened on the inner wall of the flexible pipe. Blocks are symmetrically and slidably connected inside the connection head and extend out of the connection head. A movable rod is slidably connected inside the connection head and penetrates through the blocks. A first spring is connected between the movable rod and the connection head. The movable rod extends out of the second docking plate. A sliding rod is fixedly connected to the inner wall of the block. An inclined groove is opened on the outer wall of the movable rod, and a transverse groove is opened at the top of the inclined groove.

[0007] As a further solution of the present invention: The sealing mechanism includes a mounting seat, the mounting seat is fixedly connected to the outer wall of the connecting head, a rotating ring is rotatably connected to the outer wall of the mounting seat, guiding grooves are equidistantly arranged in a circumferential manner on the outer wall of the rotating ring, a guiding rod is slidably connected to the inner wall of the guiding groove, one end of the guiding rod is fixedly connected to a movable frame, the movable frame is slidably connected to the inside of the mounting seat and extends out of the mounting seat, and one end of the movable frame is fixedly connected to a pressing block.

[0008] As a further solution of the present invention: The sealing mechanism further includes a spur gear, the spur gear is arranged on the inner wall of the rotating ring, the spur gear is rotatably connected to the inside of the mounting seat, one end of the spur gear is fixedly connected to a first threaded rod, a displacement block is slidably connected to the outer wall of the first threaded rod, the displacement block is slidably connected to the inside of the mounting seat and extends out of the mounting seat, one end of the displacement block is fixedly connected to a C-shaped block, a pressing rod is slidably connected to the inside of the clamp, one end of the pressing rod extends into the inner cavity of the clamp, the other end of the pressing rod extends out of the clamp, a fixing groove is arranged on the outer wall of the mounting seat on one side of the rotating ring, a fixing rod is rotatably connected to the top end of the rotating ring, a second threaded rod extending out of the fixing rod is rotatably connected to the inside of the fixing rod, a positioning frame is slidably connected to the outer wall of the second threaded rod, the positioning frame is slidably connected to the inside of the fixing rod, and the top end of the second threaded rod is fixedly connected to a rotating column.

[0009] As a further solution of the present invention: The outer walls of the first docking plate and the second docking plate are in fit with the inner wall of the clamp, the inner wall of the through hole is in fit with the outer wall of the screw rod of the bolt, and the bolt is matched with the nut.

[0010] As a further solution of the present invention: One end of the clamping block extending out of the connecting head is provided with a semi-circular surface, and the outer wall of one end of the clamping block is in fit with the inner wall of the clamping groove.

[0011] As a further solution of the present invention: The inner wall of the guiding groove is in fit with the outer wall of the guiding rod, the guiding groove is inclined, a vertical groove for the movable frame to slide is arranged on the outer wall of the mounting seat, a limiting rod penetrating through the movable frame is fixedly connected to the inner wall of the vertical groove, and a limiting hole for the limiting rod to slide is arranged on the outer wall of the movable frame.

[0012] As a further solution of the present invention: Gear teeth are arranged on the inner wall of the rotating ring, and the gear teeth are meshed with the spur gear.

[0013] As a further solution of the present invention: the inner wall of the C-shaped block fits against the outer wall of the extrusion rod, and a first threaded hole is formed in the outer wall of the displacement block, and the first threaded hole matches the first threaded rod.

[0014] As a further solution of the present invention: the inner wall of the fixed groove fits against the outer wall of the fixed rod, and a second threaded hole is formed in the interior of the positioning frame, and the second threaded hole matches the second threaded rod.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: By providing a connection mechanism and a sealing mechanism, the connector is connected to the rigid pipe, two clamps are sleeved on the outer walls of the first docking plate and the second docking plate to position between the rigid pipe and the connector; the flexible pipe is sleeved on the outer wall of the connector, and the clamping block is displaced and inserted into the card slot to fix between the flexible pipe and the connector; the rotating ring rotates to drive the extrusion block to displace and press the flexible pipe against the outer wall of the connector, thereby improving the sealing performance between the connector and the flexible pipe; the rotating ring rotates to drive the extrusion rod to displace and squeeze the second docking plate, and the second docking plate closely adheres to the first docking plate, thereby improving the sealing performance between the rigid pipe and the connector, facilitating the connection and sealing operations between the rigid pipe and the flexible pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural view of the present invention; Figure 2 is a connection schematic view of the rigid pipe and the flexible pipe of the present invention; Figure 3 is a cross-sectional view of the connector of the present invention; Figure 4 is a schematic structural view of the movable rod of the present invention; Figure 5 is an installation schematic view of the spur gear of the present invention; Figure 6 is a schematic structural view of the extrusion block of the present invention; Figure 7 is a schematic structural view of the fixed groove of the present invention; Figure 8 is a cross-sectional view of the fixed rod of the present invention.

[0017] In the figure: 1, hard pipe; 2, flexible pipe; 3, connecting mechanism; 301, connecting head; 302, first docking plate; 303, second docking plate; 304, sealing ring; 305, clamp; 306, connecting plate; 307, through hole; 308, bolt; 309, nut; 310, raised ring; 311, card slot; 312, card block; 313, movable rod; 314, first spring; 315, sliding rod; 316, inclined slot; 317, horizontal slot; 4, sealing mechanism; 401, mounting seat; 402, rotating ring; 403, guiding slot; 404, guiding rod; 405, movable frame; 406, extrusion block; 407, spur gear; 408, first threaded rod; 409, displacement block; 410, C-shaped block; 411, extrusion rod; 412, fixing slot; 413, fixing rod; 414, second threaded rod; 415, rotating column; 416, positioning frame; 5, vertical slot; 6, limiting rod; 7, limiting hole. Detailed implementation manner

[0018] 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.

[0019] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", and "setting" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. Next, the embodiments of the present invention will be described according to the overall structure of the present invention.

[0020] Please refer to Figures 1 to 8, in the embodiment of the present invention, a vacuum pump fluid pipeline sealing connection structure includes a hard pipe 1 and a flexible pipe 2. The hard pipe 1 and the flexible pipe 2 are connected through a connection mechanism 3, and the hard pipe 1 and the flexible pipe 2 are sealed through a sealing mechanism 4. The connection mechanism 3 includes a connection head 301. The connection head 301 is arranged between the hard pipe 1 and the flexible pipe 2. One end of the hard pipe 1 facing the connection head 301 is fixedly connected with a first docking plate 302, and one end of the connection head 301 facing the hard pipe 1 is fixedly connected with a second docking plate 303. A sealing ring 304 is arranged between the first docking plate 302 and the second docking plate 303. Two clamping rings 305 are sleeved on the outer walls of the first docking plate 302 and the second docking plate 303. Two connecting plates 306 are symmetrically and fixedly connected to both sides of the clamping ring 305. A through hole 307 is formed in the outer wall of the connecting plate 306. A bolt 308 is slidably connected to the inner wall of the through hole 307, and a nut 309 is threadedly connected to the outer wall of the bolt 308.

[0021] The connection mechanism 3 further includes a raised ring 310. The raised ring 310 is fixedly connected to the outer wall of the connection head 301. A clamping groove 311 is formed in the inner wall of the flexible pipe 2. Two blocks 312 extending out of the connection head 301 are symmetrically and slidably connected inside the connection head 301. A movable rod 313 passing through the block 312 is slidably connected inside the connection head 301. A first spring 314 is connected between the movable rod 313 and the connection head 301. The movable rod 313 extends out of the second docking plate 303. A sliding rod 315 is fixedly connected to the inner wall of the block 312. An inclined groove 316 is formed in the outer wall of the movable rod 313, and a horizontal groove 317 is formed at the top of the inclined groove 316.

[0022] In this embodiment: when connecting the hard pipe 1 and the flexible pipe 2, the connection head 301 is connected to the hard pipe 1, so that the first docking plate 302 and the second docking plate 303 are attached to each other, and the sealing ring 304 is located between the first docking plate 302 and the second docking plate 303. Then, the two clamping rings 305 are docked, and the two clamping rings 305 are sleeved on the outer walls of the first docking plate 302 and the second docking plate 303 to position between the hard pipe 1 and the connection head 301. The bolt 308 is passed through the through hole 307, and the nut 309 is connected to the outer wall of the bolt 308, so as to fixedly connect the two clamping rings 305.

[0023] The hose 2 is sleeved on the outer wall of the connector 301. When the hose 2 passes through the raised ring 310, the raised ring 310 squeezes the hose 2, thereby improving the sealing performance between the hose 2 and the connector 301. At the same time, the hose 2 pushes the clamping block 312 into the interior of the connector 301. At this time, the sliding rod 315 slides to the bottom end of the inclined groove 316. When the first docking plate 302 is fitted with the second docking plate 303, the first docking plate 302 contacts the movable rod 313 and pushes the movable rod 313 to displace, squeezing the first spring 314. When the movable rod 313 displaces, the sliding rod 315 slides along the inclined groove 316 into the transverse groove 317. The displacement of the sliding rod 315 drives the clamping block 312 to displace, and the clamping block 312 displaces and inserts into the card slot 311 to fix the connection between the hose 2 and the connector 301, facilitating the connection operation between the rigid pipe 1 and the hose 2.

[0024] Please refer specifically to Figures 5 to 8 , the sealing mechanism 4 includes a mounting base 401, the mounting base 401 is fixedly connected to the outer wall of the connector 301, the outer wall of the mounting base 401 is rotatably connected with a rotating ring 402, the outer wall of the rotating ring 402 is circumferentially and equidistantly provided with guide grooves 403, the inner wall of the guide grooves 403 is slidably connected with guide rods 404, one end of the guide rods 404 is fixedly connected with a movable frame 405, the movable frame 405 is slidably connected to the inside of the mounting base 401 and extends out of the mounting base 401, one end of the movable frame 405 is fixedly connected with a pressing block 406, the sealing mechanism 4 further includes a spur gear 407, the spur gear 407 is arranged on the inner wall of the rotating ring 402, the spur gear 407 is rotatably connected to the inside of the mounting base 401, one end of the spur gear 407 is fixedly connected with a first threaded rod 408, the outer wall of the first threaded rod 408 is slidably connected with a displacement block 409, the displacement block 409 is slidably connected to the inside of the mounting base 401 and extends out of the mounting base 401, one end of the displacement block 409 is fixedly connected with a C-shaped block 410, a pressing rod 411 is slidably connected to the inside of the clamp 305, one end of the pressing rod 411 extends into the inner cavity of the clamp 305, the other end of the pressing rod 411 extends out of the clamp 305, a fixing groove 412 is provided on the outer wall of the mounting base 401 on one side of the rotating ring 402, the top end of the rotating ring 402 is rotatably connected with a fixing rod 413, a second threaded rod 414 extending out of the fixing rod 413 is rotatably connected to the inside of the fixing rod 413, the outer wall of the second threaded rod 414 is slidably connected with a positioning frame 416, the positioning frame 416 is slidably connected to the inside of the fixing rod 413, and the top end of the second threaded rod 414 is fixedly connected with a rotating column 415.

[0025] In this embodiment: when improving the sealing between the connecting head 301 and the hose 2, the rotating ring 402 is rotated, and the rotating ring 402 rotates to drive the guide rod 404 to slide in the guide groove 403, and the displacement of the guide rod 404 drives the movable frame 405 to move, and the displacement of the movable frame 405 drives the extrusion block 406 to move, and the displacement of multiple extrusion blocks 406 presses the hose 2 against the outer wall of the connecting head 301, thereby improving the sealing between the connecting head 301 and the hose 2.

[0026] When the clamp 305 is installed, the displacement of the clamp 305 drives the extrusion rod 411 to move, so that the extrusion rod 411 moves into the inner cavity of the C-shaped block 410; when the sealing between the connector 301 and the hard tube 1 is improved, the rotation of the rotating ring 402 drives the spur gear 407 to rotate, the rotation of the spur gear 407 drives the first threaded rod 408 to rotate, the rotation of the first threaded rod 408 drives the displacement block 409 to move, the displacement of the displacement block 409 drives the C-shaped block 410 to move, the displacement of the C-shaped block 410 pushes the extrusion rod 411 to move, and the displacement of the extrusion rod 411 causes extrusion on the second docking plate 303. The second docking plate 303 is tightly attached to the first docking plate 302, thereby improving the sealing between the hard tube 1 and the connecting head 301; after the rotating ring 402 is rotated, the fixing rod 413 is rotated, and the fixing rod 413 is engaged into the fixing groove 412 to fix the rotating ring 402, and then the rotating column 415 is rotated, and the rotating column 415 rotates to drive the second threaded rod 414 to rotate, and the second threaded rod 414 rotates to drive the positioning frame 416 to move, and the positioning frame 416 moves to contact the outer wall of one end of the mounting seat 401, thereby fixing the fixing rod 413, which is convenient for improving the sealing between the hard tube 1 and the hose 2.

[0027] Please refer to Figures 1 to 4 The outer walls of the first docking plate 302 and the second docking plate 303 fit with the inner wall of the clamp 305 , the inner wall of the through hole 307 fits with the outer wall of the screw of the bolt 308 , and the bolt 308 matches with the nut 309 .

[0028] In this embodiment: two clamps 305 are sleeved on the outer walls of the first docking plate 302 and the second docking plate 303 to position the hard pipe 1 and the connecting head 301, a bolt 308 is passed through the through hole 307, and a nut 309 is connected to the outer wall of the bolt 308, thereby fixing the two clamps 305.

[0029] Please refer to Figures 1 to 4 One end of the card block 312 extending out of the connector 301 is provided with a semicircular surface, and the outer wall of one end of the card block 312 is in contact with the inner wall of the card slot 311 .

[0030] In this embodiment: When the first docking plate 302 is fitted to the second docking plate 303, the first docking plate 302 contacts the movable rod 313 and pushes the movable rod 313 to displace, squeezing the first spring 314. When the movable rod 313 displaces, the sliding rod 315 slides along the inclined groove 316 into the transverse groove 317. The displacement of the sliding rod 315 drives the latch 312 to displace, and the latch 312 displaces and inserts into the card slot 311 to fix the hose 2 and the connector 301.

[0031] Please refer specifically to Figures 5 to 8 , the inner wall of the guiding groove 403 fits with the outer wall of the guiding rod 404. The guiding groove 403 is inclined. A vertical groove 5 for the movable frame 405 to slide is provided on the outer wall of the mounting seat 401. A limiting rod 6 passing through the movable frame 405 is fixedly connected to the inner wall of the vertical groove 5. A limiting hole 7 for the limiting rod 6 to slide is provided on the outer wall of the movable frame 405.

[0032] In this embodiment: Rotate the rotating ring 402. The rotation of the rotating ring 402 drives the guiding rod 404 to slide in the guiding groove 403. The displacement of the guiding rod 404 drives the movable frame 405 to displace. The displacement of the movable frame 405 drives the extrusion block 406 to displace. At this time, the movable frame 405 slides in the vertical groove 5, and the limiting rod 6 slides in the limiting hole 7, thereby limiting the displacement direction of the movable frame 405.

[0033] Please refer specifically to Figures 5 to 8 , the inner wall of the rotating ring 402 is provided with gear teeth, which mesh with the spur gear 407. The inner wall of the C-shaped block 410 fits with the outer wall of the extrusion rod 411. A first threaded hole is provided on the outer wall of the displacement block 409, and the first threaded hole matches the first threaded rod 408.

[0034] In this embodiment: The rotation of the rotating ring 402 drives the spur gear 407 to rotate. The rotation of the spur gear 407 drives the first threaded rod 408 to rotate. The rotation of the first threaded rod 408 drives the displacement block 409 to displace. The displacement of the displacement block 409 drives the C-shaped block 410 to displace. The displacement of the C-shaped block 410 pushes the extrusion rod 411 to displace, and the displacement of the extrusion rod 411 squeezes the second docking plate 303.

[0035] Please refer specifically to Figures 5 to 8 , the inner wall of the fixed groove 412 fits with the outer wall of the fixed rod 413. A second threaded hole is provided inside the positioning frame 416, and the second threaded hole matches the second threaded rod 414.

[0036] In this embodiment: After the rotation ring 402 finishes rotating, rotate the fixing rod 413, and the fixing rod 413 snaps into the fixing groove 412 to fix the rotation ring 402. Then rotate the rotating column 415. The rotation of the rotating column 415 drives the second threaded rod 414 to rotate. The rotation of the second threaded rod 414 drives the positioning frame 416 to displace. The displacement of the positioning frame 416 contacts the outer wall of one end of the mounting base 401, thereby performing a fixing operation on the fixing rod 413.

[0037] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A fluid pipeline sealing connection structure for a vacuum pump, comprising a hard pipe (1) and a flexible pipe (2), characterized in that, The connection operation between the rigid pipe (1) and the flexible pipe (2) is carried out through a connection mechanism (3), and the sealing operation between the rigid pipe (1) and the flexible pipe (2) is carried out through a sealing mechanism (4). The connection mechanism (3) includes a connection head (301). The connection head (301) is arranged between the rigid pipe (1) and the flexible pipe (2). One end of the rigid pipe (1) facing the connection head (301) is fixedly connected with a first docking plate (302). One end of the connection head (301) facing the rigid pipe (1) is fixedly connected with a second docking plate (303). A sealing ring (304) is arranged between the first docking plate (302) and the second docking plate (303). Two clamps (305) are sleeved on the outer walls of the first docking plate (302) and the second docking plate (303). Connecting plates (306) are symmetrically and fixedly connected to both sides of the clamp (305). Through holes (307) are formed in the outer walls of the connecting plates (306). Bolts (308) are slidably connected to the inner walls of the through holes (307). Nuts (309) are threadedly connected to the outer walls of the bolts (308).

2. The sealed connection structure of the fluid pipeline of a vacuum pump according to claim 1, characterized in that, The connection mechanism (3) further includes a raised ring (310). The raised ring (310) is fixedly connected to the outer wall of the connection head (301). A clamping groove (311) is formed in the inner wall of the flexible pipe (2). Blocks (312) extending out of the connection head (301) are symmetrically and slidably connected to the inside of the connection head (301). A movable rod (313) passing through the blocks (312) is slidably connected to the inside of the connection head (301). A first spring (314) is connected between the movable rod (313) and the connection head (301). The movable rod (313) extends out of the second docking plate (303). A sliding rod (315) is fixedly connected to the inner wall of the block (312). An inclined groove (316) is formed in the outer wall of the movable rod (313). A transverse groove (317) is formed at the top of the inclined groove (316).

3. A fluid pipeline sealing connection structure of a vacuum pump according to claim 2, characterized in that, The sealing mechanism (4) includes a mounting seat (401). The mounting seat (401) is fixedly connected to the outer wall of the connection head (301). A rotating ring (402) is rotatably connected to the outer wall of the mounting seat (401). Guide grooves (403) are equidistantly formed in the circumferential direction of the outer wall of the rotating ring (402). Guide rods (404) are slidably connected to the inner walls of the guide grooves (403). One end of the guide rod (404) is fixedly connected with a movable frame (405). The movable frame (405) is slidably connected to the inside of the mounting seat (401) and extends out of the mounting seat (401). One end of the movable frame (405) is fixedly connected with a pressing block (406).

4. A fluid pipeline sealing connection structure of a vacuum pump according to claim 3, characterized in that The sealing mechanism (4) further includes a spur gear (407). The spur gear (407) is arranged on the inner wall of the rotating ring (402). The spur gear (407) is rotatably connected to the inside of the mounting seat (401). One end of the spur gear (407) is fixedly connected to a first threaded rod (408). A displacement block (409) is slidably connected to the outer wall of the first threaded rod (408). The displacement block (409) is slidably connected to the inside of the mounting seat (401) and extends out of the mounting seat (401). One end of the displacement block (409) is fixedly connected to a C-shaped block (410). A pressing rod (411) is slidably connected to the inside of the clamp (305). One end of the pressing rod (411) extends into the inner cavity of the clamp (305). The other end of the pressing rod (411) extends out of the clamp (305). A fixing groove (412) is formed on the outer wall of the mounting seat (401) on one side of the rotating ring (402). A fixing rod (413) is rotatably connected to the top of the rotating ring (402). A second threaded rod (414) that extends out of the fixing rod (413) is rotatably connected to the inside of the fixing rod (413). A positioning frame (416) is slidably connected to the outer wall of the second threaded rod (414). The positioning frame (416) is slidably connected to the inside of the fixing rod (413). The top of the second threaded rod (414) is fixedly connected to a rotating column (415).

5. A fluid pipeline sealing connection structure of a vacuum pump according to claim 2, characterized in that, The outer walls of the first docking plate (302) and the second docking plate (303) are in fit with the inner wall of the clamp (305). The inner wall of the through hole (307) is in fit with the outer wall of the screw rod of the bolt (308). The bolt (308) is matched with the nut (309).

6. The sealing connection structure of the fluid pipeline of a vacuum pump according to claim 2, wherein, One end of the clamping block (312) that extends out of the connector (301) is provided with a semi-circular surface. The outer wall of one end of the clamping block (312) is in fit with the inner wall of the clamping groove (311).

7. A fluid pipeline sealing connection structure of a vacuum pump according to claim 4, characterized in that The inner wall of the guiding groove (403) is in fit with the outer wall of the guiding rod (404). The guiding groove (403) is inclined. A vertical groove (5) for the sliding of the movable frame (405) is formed on the outer wall of the mounting seat (401). A limiting rod (6) that penetrates through the movable frame (405) is fixedly connected to the inner wall of the vertical groove (5). A limiting hole (7) for the sliding of the limiting rod (6) is formed on the outer wall of the movable frame (405).

8. A fluid pipeline sealing connection structure of a vacuum pump according to claim 4, characterized in that, The inner wall of the rotating ring (402) is provided with gear teeth, which are meshed with the spur gear (407).

9. The sealed connection structure of the fluid pipeline of a vacuum pump according to claim 4, wherein The inner wall of the C-shaped block (410) is in fit with the outer wall of the pressing rod (411). A first threaded hole is formed on the outer wall of the displacement block (409), which is matched with the first threaded rod (408).

10. A fluid pipeline sealing connection structure of a vacuum pump according to claim 4, characterized in that, The inner wall of the fixing groove (412) is in fit with the outer wall of the fixing rod (413). A second threaded hole is formed in the inside of the positioning frame (416), which is matched with the second threaded rod (414).

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