Pipeline joint with dustproof function

Abstract

The utility model discloses a pipeline joint with a dustproof function, relates to a seal for conveying materials, and aims to block and prevent dust for the pipeline joint after the pipeline joint is disconnected. According to the technical scheme, the pipeline connector with the dustproof function comprises a pipe body, a fixed connector is arranged at the front end of the pipe body, a first driving device is fixedly installed outside the pipe body, and a piston rod of the first driving device can do reciprocating rectilinear motion in the axis direction of the pipe body and can also do reciprocating rotation motion in the axis direction of the pipe body. The piston rod is connected with the dustproof cover plate, the dustproof cover plate has a blocking state and an unblocking state along with the motion trail of the piston rod, in the blocking state, the dustproof cover plate blocks the fixed connector and abuts against the end face of the fixed connector, and in the unblocking state, the dustproof cover plate is located on the front side of the fixed connector. And the dustproof cover plate is positioned outside the corresponding space range of the cylinder corresponding to the fixed joint extending along the axis direction of the pipe body. The sealing device is used for sealing and dust prevention of the pipeline joint.

Description

Technical Field

[0001] The utility model relates to a seal used for material transportation, in particular to a pipeline joint with a dustproof function. Background Art

[0002] Pipe connectors consist of male and female connectors, which are typically connected manually, a cumbersome process. After disconnecting the pipe connector, dust plugs are typically used to prevent dust from entering the connector. However, these plugs are easily lost and contaminated. For example, when loading and unloading liquor from a vehicle, after connecting the liquid outlet of the transport vehicle to the metal hose connector, the operator manually tightens and locks the pipe connector to prevent liquor leakage. This is a cumbersome process and prone to errors.

[0003] After the male and female connectors of a pipe joint are connected, there is a risk of leakage of the liquid medium being transported within the joint. To achieve fully automated and unmanned loading and unloading of liquor on vehicles, a device must be designed to automatically tighten the male and female connectors after connection and ensure a tight seal. Utility Model Content

[0004] The utility model provides a pipe joint with a dustproof function, which aims to seal the pipe joint to prevent dust after the pipe joint is disconnected.

[0005] The technical solution adopted by the utility model is: a pipe joint with a dust-proof function, comprising a hard pipe body, the front end of the pipe body being a fixed joint, a first driving device being fixedly installed outside the pipe body, the first driving device comprising a cylinder body and a piston rod in the cylinder body, the piston rod being able to both reciprocate linearly along the axial direction of the pipe body and rotate reciprocatingly around its axial direction, the exposed end of the piston rod being directly fixedly connected to the dust cover plate, or the exposed end of the piston rod being fixedly connected to the dust cover plate through an extension rod, the plane corresponding to the dust cover plate being perpendicular to the end face of the fixed joint; the dust cover plate having two states, a blocked state and an unblocked state, following the movement trajectory of the piston rod, the blocked state being that the dust cover plate blocks the fixed joint and abuts against the end face of the fixed joint, the unblocked state being that the dust cover plate is located at the front side of the fixed joint, and the dust cover plate is located outside the corresponding spatial range of the cylinder corresponding to the fixed joint extending along the axial direction of the pipe body.

[0006] In order to improve the sealing effect of the dustproof cover on the fixed joint, further: a gasket or a pad is provided on the side of the dustproof cover that is used to abut against the fixed joint.

[0007] In order to facilitate the installation and fixation of the first drive device, further: a clamp seat is fixedly installed on the outside of the tube body, the clamp seat includes an upper clamp seat and a lower clamp seat, the upper clamp seat and the lower clamp seat are respectively provided with a semi-cylindrical shaped slot, the upper clamp seat and the lower clamp seat are clamped on the outside of the tube body and fixedly connected, and the first drive device is installed on the clamp seat.

[0008] The first driving device is used to drive the dust cover. Specifically, the first driving device is a pneumatic cylinder or a hydraulic cylinder.

[0009] In order to improve the stability of the dust cover, further: the tube body is also fixedly installed with a support seat, the support seat is provided with an axial hole, the diameter of the axial hole, the diameter of the piston rod and the diameter of the extension rod are adapted to each other, and the piston rod or the extension rod passes through the axial hole.

[0010] The fixed joint of the pipe body is used to connect with the movable joint. Furthermore, the pipe joint with dustproof function also includes a movable joint. The movable joint and the fixed joint are adapted to each other. One of the fixed joint and the movable joint is a male joint and the other is a female joint.

[0011] In order to ensure that the movable joint is firmly and quickly connected to the fixed joint, further: the fixed joint is a female joint, the fixed joint is provided with at least one locking block, the locking block is movably installed on the fixed joint and arranged along the circumferential direction of the fixed joint, the locking block has two states: a locked state and an unlocked state. The locked state is that the locking block is partially located within the cylinder corresponding to the inner wall of the fixed joint, and the unlocked state is that the locking block is completely located outside the cylinder corresponding to the inner wall of the fixed joint; the movable joint is a male joint, a circle of grooves is provided on the outside of the movable joint, the movable joint is connected to the fixed joint and when the locking block is in the locked state, the locking block is stuck in the groove.

[0012] In order to facilitate the automatic control of the locking block to switch between the locked state and the unlocked state, further: the pipe joint with dustproof function also includes a second driving device, the rear end of the second driving device can be rotatably installed on the pipe body or the clamp seat, and the front end of the second driving device is provided with a telescopic rod that can move back and forth linearly; the pipe wall of the fixed joint is provided with a mounting groove, and the mounting groove is arranged along the axial direction of the fixed joint. A rotating shaft is provided between the two sides of the mounting groove, and the axial direction of the rotating shaft is perpendicular to the axial direction of the fixed joint. The locking block is provided with an eccentric hole and passes through the rotating shaft. The end of the locking block located outside the fixed joint is rotatably connected to the telescopic rod; the axial direction of the rear end of the second driving device, the axial direction of the rotatable connection between the locking block and the telescopic rod, and the axial direction of the rotating shaft are parallel to each other.

[0013] The second driving device is used to drive the locking block to switch between the locked state and the unlocked state. Specifically, the second driving device is a pneumatic cylinder or a hydraulic cylinder.

[0014] In order to improve the stability of the movable joint and the fixed joint after connection and avoid overly complicated structure, further: 2 to 4 locking blocks are evenly arranged along the circumferential direction of the fixed joint, and each locking block is provided with a set of second driving devices.

[0015] The beneficial effects of the present invention are as follows: the first driving device can drive the dust cover to move to a blocking state, at which time the dust cover blocks the fixed joint and abuts against the end face of the fixed joint, and the dust cover can prevent the fixed joint from being contaminated by dust. The first driving device can also drive the dust cover to move to an unblocking state, at which time the dust cover is located outside the corresponding spatial range of the cylinder corresponding to the fixed joint extending along the axial direction of the tube body, and the dust cover does not affect the docking operation of the movable joint and the fixed joint at all. The fixed joint is a female joint and is provided with a locking block, and the movable joint is a male joint and is provided with a groove. After the movable joint is docked with the fixed joint, the locking block is snapped into the groove to achieve locking between the movable joint and the fixed joint, which is beneficial to improving the stability and sealing of the connection, and can realize automated operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figures 1 to 3 It is a three-dimensional structural schematic diagram of the same embodiment of the present invention at three different angles.

[0017] Figure markings: tube body 1, fixed joint 1-1, mounting groove 1-2, rotating shaft 1-3, first driving device 2, cylinder body 2-1, piston rod 2-2, dust cover 3, extension rod 4, clamping seat 5, support seat 6, movable joint 7, groove 7-1, locking block 8, second driving device 9, telescopic rod 9-1. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] like Figures 1 to 3 As shown in the figure, the dustproof pipe joint of the present invention comprises a hard pipe body 1, the front end of which is a fixed joint 1-1, which is used to connect with another matching joint. A first driving device 2 is fixedly installed on the outside of the pipe body 1. The first driving device 2 can be directly fixed on the pipe body 1, or a support can be fixed on the outside of the pipe body 1, and the first driving device 2 is installed on the support. For example, Figures 1 to 3As shown, in order to facilitate the installation and fixation of the first drive device 2, a clamping seat 5 is fixedly installed on the outer side of the tube body 1. The main function of the clamping seat 5 is to provide a stable and precise support to ensure that the various components can be correctly installed and aligned, while reducing friction and wear during movement, improving stability and extending the service life of the device. For example, the clamping seat 5 includes an upper clamping seat and a lower clamping seat. The upper clamping seat and the lower clamping seat are respectively provided with a semi-cylindrical groove. The upper clamping seat and the lower clamping seat are clamped on the outer side of the tube body 1 and fixedly connected. The upper clamping seat and the lower clamping seat can be fixed by bonding, bolting, or fixing with a connecting plate. As long as the clamping seat 5 can be firmly fixed to the tube body 1, the first drive device 2 is installed on the clamping seat 5.

[0020] The first driving device 2 includes a cylinder body 2-1 and a piston rod 2-2 in the cylinder body 2-1. The centerline direction of the cylinder body 2-1 is parallel to the axis direction of the tube body 1. The cylinder body 2-1 is directly fixed to the tube body 1 or the clamping seat 5. The exposed end of the piston rod 2-2 is directly fixedly connected to the dust cover 3, or the exposed end of the piston rod 2-2 is fixedly connected to the extension rod 4, and the extension rod 4 is fixedly connected to the dust cover 3. Figures 1 to 3 As shown. The dust cover 3 can be connected to the exposed end of the piston rod 2-2 directly or via a rotating connection block. The extension rod 4 can be connected to the exposed end of the piston rod 2-2 directly or via a rotating connection block. The rotating connection block can provide greater stability for the dust cover 3. When the piston rod 2-2 is fixedly connected to the dust cover 3 via the extension rod 4, the extension rod 4 and the piston rod 2-2 are arranged coaxially. The first drive device 2 is used to drive the dust cover 3. The first drive device 2 is a pneumatic cylinder or a hydraulic cylinder. Because the force required to drive the dust cover 3 is not large, the first drive device 2 is preferably a pneumatic cylinder. The piston rod 2-2 can move both linearly and reciprocatingly along the axis of the tube body 1 and rotationally about its axis. The angle of rotation of the piston rod 2-2 about its axis can be any angle that allows the dust cover 3 to be located outside the spatial range corresponding to the extension of the cylindrical portion of the fixed joint 1-1 along the axis of the tube body 1, generally between 60° and 180°, for example, 75°. The first drive device 2 may be an existing device or may be custom-produced based on existing technology. For example, a guide groove and a guide rib are provided between the inner wall of the cylinder body 2-1 and the outer wall of the piston rod 2-2, which are adapted to each other. The guide rib is located within the guide groove, which includes a straight section and a spiral section. When the guide rib of the piston rod 2-2 is located within the straight section of the guide groove, the piston rod 2-2 moves linearly along the axis of the tubular body 1. When the guide rib of the piston rod 2-2 is located within the spiral section, the piston rod 2-2 not only moves linearly along the axis of the tubular body 1 but also simultaneously rotates about the axis of the piston rod 2-2.

[0021] The dust cover 3 is used to shield the end face of the fixed joint 1-1, so the plane corresponding to the dust cover 3 is perpendicular to the end face of the fixed joint 1-1, and the diameter of the dust cover 3 is larger than the diameter of the fixed joint 1-1. The axis of the piston rod 2-2 is located at the edge of the dust cover 3. The dust cover 3 has two states along the movement trajectory of the piston rod 2-2: a blocked state and an unblocked state. The two extreme positions of the dust cover 3 along the movement of the piston rod 2-2 preferably correspond to the blocked state and the unblocked state, respectively. Among them, the blocked state is that the dust cover 3 blocks the end face of the fixed joint 1-1 and abuts against the end face of the fixed joint 1-1; the unblocked state is that the dust cover 3 is located on the front side of the fixed joint 1-1, and the dust cover 3 is located outside the spatial range corresponding to the extension of the cylinder corresponding to the fixed joint 1-1 along the axial direction of the tube body 1. At this time, the dust cover 3 does not affect the connection, disconnection, and other operations of the fixed joint 1-1 with another compatible joint.

[0022] When the fixed joint 1-1 at the front end of the tube body 1 needs to be sealed to prevent dust from entering the fixed joint 1-1, the piston rod 2-2 of the first drive device 2 retracts and rotates into the cylinder body 2-1 until the dust cover 3 seals the end face of the fixed joint 1-1 and abuts against the end face of the fixed joint 1-1, that is, until the dust cover 3 is in a sealed state. When the dust cover 3 needs to be removed, for example, when the fixed joint 1-1 needs to be connected to another compatible joint, the piston rod 2-2 of the first drive device 2 extends out of the cylinder body 2-1, and the dust cover 3 disengages from the end face of the fixed joint 1-1. The piston rod 2-2 continues to extend out of the cylinder body 2-1 and rotates, and the dust cover 3 is located outside the spatial range corresponding to the extension of the cylindrical body corresponding to the fixed joint 1-1 along the axial direction of the tube body 1 until the dust cover 3 is in an unsealed state. After the dust cover 3 is in the unsealed state, it has no effect on the connection operation between the fixed joint 1-1 and the other compatible joint. To enhance the sealing effect of the dust cover 3 on the fixed joint 1-1, a gasket or backing plate is provided on the side of the dust cover 3 that contacts the fixed joint 1-1. The gasket and backing plate are generally made of a flexible material, such as silicone. After the piston rod 2-2 of the first drive device 2 extends out of the cylinder body 2-1, the stability of the dust cover 3 is reduced. To enhance the stability of the dust cover 3, the tubular body 1 is further fixedly mounted with a support base 6. The support base 6 has an axial hole whose diameters match those of the piston rod 2-2 and the extension rod 4. The piston rod 2-2 or the extension rod 4 extends through the axial hole.

[0023] The pipe body 1 is generally fixedly installed at the outlet of the container and relatively fixed. The pipe body 1 is a hard pipe, which is convenient for the installation of the first drive device 2. The joint connected to the fixed joint 1-1 of the pipe body 1 is generally free to move, so it is a movable joint 7. The movable joint 7 is generally connected to the end of a hose, such as the end of a metal hose. The pipe joint with dustproof function also includes a movable joint 7, which is adapted to the fixed joint 1-1. One of the fixed joint 1-1 and the movable joint 7 is a male joint and the other is a female joint. For example, in Figures 1 to 3 In the illustrated embodiment, the fixed joint 1-1 is a female joint, and the movable joint 7 is a male joint. The inner diameter of the fixed joint 1-1 is larger than the inner diameter of the tube body 1, and the inner diameter of the movable joint 7 is consistent with the inner diameter of the tube body 1 (the tube section other than the fixed joint 1-1). After the movable joint 7 is connected to the fixed joint 1-1, the diameter of the tube at the joint and the diameter of the tube body 1 can remain unchanged.

[0024] In order to ensure that the movable joint 7 is connected to the fixed joint 1-1 stably and quickly, when the fixed joint 1-1 is a female joint and the movable joint 7 is a male joint, the fixed joint 1-1 is provided with at least one locking block 8. The locking block 8 is used to temporarily lock and tighten the movable joint 7 and the fixed joint 1-1 to prevent the movable joint 7 from being disconnected from the fixed joint 1-1, while maintaining the sealing between the movable joint 7 and the fixed joint 1-1. The locking block 8 can also release the temporary lock so that the locking block 8 does not affect the preliminary docking of the movable joint 7 and the fixed joint 1-1 before locking, nor does it affect the disconnection of the movable joint 7 and the fixed joint 1-1. The locking block 8 ensures a stable connection between the various components during operation by clamping the movable joint 7, preventing the equipment from loosening due to vibration or external force during operation, and evenly distributes pressure, reducing local stress concentration and extending the service life of the pipe joint.

[0025] When there are two or more locking blocks 8, each locking block 8 is arranged along the circumference of the fixed joint 1-1, and preferably evenly. In order to improve the stability of the connection between the movable joint 7 and the fixed joint 1-1 and avoid excessive complexity of the structure, 2 to 4 locking blocks 8 are evenly arranged along the circumference of the fixed joint 1-1. For example, Figures 1 to 3In the illustrated embodiment, the fixed joint 1-1 is equipped with two locking blocks 8, with the line connecting the two locking blocks 8 being perpendicular to the axis of the fixed joint 1-1. The locking block 8 comprises both a portion that can enter the interior of the fixed joint 1-1 and a portion that is located outside the fixed joint 1-1. The portion of the locking block 8 located outside the fixed joint 1-1 is generally rod-shaped. The locking block 8 is movably mounted on the fixed joint 1-1 and has two states: locked and unlocked. This means that the state of the movable joint 7 can be switched between the locked and unlocked states manually or automatically. In the locked state, the locking block 8 is partially located within the cylindrical portion corresponding to the inner wall of the fixed joint 1-1, while the unlocked state is when the locking block 8 is completely located outside the cylindrical portion corresponding to the inner wall of the fixed joint 1-1. The movable joint 7 is a male joint with a groove 7-1 disposed on the outer side of the movable joint 7. The locking block 8 slides into or snaps into the groove 7-1 to lock the movable joint 7 with the fixed joint 1-1. Removing the locking block 8 from the groove 7-1 unlocks the movable joint 7 from the fixed joint 1-1.

[0026] The movable joint 7 can be switched between the locked state and the unlocked state by means of telescoping, rotating, etc., and can be operated manually or automatically by means of a driving device. Figures 1 to 3 The pipe joint with dustproof function also includes a second drive device 9, which is used to drive the locking block 8 to switch between the locked state and the unlocked state. The second drive device 9 is a pneumatic cylinder or a hydraulic cylinder. Considering that the force required to drive the locking block 8 is not large, the second drive device 9 is preferably a pneumatic cylinder. When the number of locking blocks 8 is 2 to 3, each locking block 8 can be provided with a set of second drive devices 9; when the number of locking blocks 8 exceeds 3, each locking block 8 can be provided with a set of second drive devices 9, or 2 to 3 second drive devices 9 can be shared. The rear end of the second drive device 9 can be rotatably mounted on the pipe body 1 or the clamp seat 5. For example, Figures 1 to 3 In the illustrated embodiment, the rear end of the second drive device 9 can be rotatably mounted on the clamping seat 5, which can provide a stable support for the second drive device 9, making the second drive device 9 more stable, reducing displacement and vibration during movement, and improving the overall stability, safety and reliability.

[0027] The front end of the second drive device 9 is provided with a telescopic rod 9-1 that can reciprocate linearly. The telescopic rod 9-1 can only reciprocate linearly along the cylinder of the second drive device 9. The telescopic rod 9-1 is used to pull the locking block 8 to rotate around the rotating shaft 1-3, so that the locking block 8 can be switched between the locked state and the unlocked state, and remain in the locked state or the unlocked state. The pipe wall of the fixed joint 1-1 is provided with a mounting groove 1-2. The mounting groove 1-2 is a strip groove. The mounting groove 1-2 is arranged along the axial direction of the fixed joint 1-1, that is, the length direction of the strip groove is in the same direction as the axial direction of the fixed joint 1-1. A rotating shaft 1-3 is provided between the two sides of the mounting groove 1-2. The axial direction of the rotating shaft 1-3 is perpendicular to the axial direction of the fixed joint 1-1. The locking block 8 is provided with an eccentric hole and is passed through the rotating shaft 1-3. The locking block 8 can rotate around the rotating shaft 1-3. The end of the locking block 8 located outside the fixed joint 1-1 is rotatably connected to the telescopic rod 9-1. The locking block 8 and telescopic rod 9-1 can be connected directly or via a connecting block. By transferring motion and force, the locking block 8 and telescopic rod 9-1 achieve synchronization and coordination, thereby maintaining the overall efficiency and stability of the system. During movement, the connecting block can absorb and cushion some vibration and impact, reducing the impact on other components and maintaining smooth and precise movement.

[0028] The axial direction of the rear end of the second drive device 9, the axial direction of the rotatable connection between the locking block 8 and the telescopic rod 9-1, and the axial direction of the rotating shaft 1-3 are parallel to each other. The locking block 8 is provided with an eccentric hole, and the locking block 8 can rotate around the rotating shaft 1-3. The locking block 8 can be rotated to be completely outside the cylinder corresponding to the fixed joint 1-1, and the locking block 8 can also be rotated to be partially inside the cylinder corresponding to the fixed joint 1-1, and squeeze and lock the groove 7-1 of the movable joint 7. The telescopic rod 9-1 of the second drive device 9 can remain fixed, thereby keeping the locking block 8 fixed. The movable joint 7 is connected to the fixed joint 1-1, and the locking block 8 is in a locked state. The second drive device 9 can keep the locking block 8 fixed to prevent the movable joint 7 from accidentally disconnecting, thereby ensuring the safety of the pipeline system and the stability of fluid transportation.

Claims

1. A pipe joint with a dustproof function, comprising a hard pipe body (1), the front end of the pipe body (1) being a fixed joint (1-1), characterized in that: A first driving device (2) is fixedly installed outside the tube body (1). The first driving device (2) includes a cylinder body (2-1) and a piston rod (2-2) in the cylinder body (2-1). The piston rod (2-2) can move back and forth linearly along the axis of the tube body (1) and can also move back and forth rotationally around the axis. The exposed end of the piston rod (2-2) is directly fixedly connected to the dust cover (3), or the exposed end of the piston rod (2-2) is fixedly connected to the dust cover (3) through an extension rod (4). The dust cover (3) corresponds to The plane is perpendicular to the end face of the fixed joint (1-1); the dust cover (3) has two states, a blocking state and an unblocking state, following the movement trajectory of the piston rod (2-2); in the blocking state, the dust cover (3) blocks the fixed joint (1-1) and abuts against the end face of the fixed joint (1-1); in the unblocking state, the dust cover (3) is located at the front side of the fixed joint (1-1), and is located outside the space range corresponding to the extension of the cylinder corresponding to the fixed joint (1-1) along the axial direction of the tube body (1).

2. The pipe joint with dustproof function according to claim 1, characterized in that: A washer or a pad is provided on one side of the dustproof cover plate (3) for contacting the fixed joint (1-1).

3. The pipe joint with dustproof function according to claim 1, characterized in that: A clamping seat (5) is fixedly installed on the outside of the tube body (1), and the clamping seat (5) comprises an upper clamping seat and a lower clamping seat, and the upper clamping seat and the lower clamping seat are respectively provided with a semi-cylindrical clamping groove, and the upper clamping seat and the lower clamping seat are clamped on the outside of the tube body (1) and fixedly connected, and the first drive device (2) is installed on the clamping seat (5).

4. The pipe joint with dustproof function according to claim 1, characterized in that: The first driving device (2) is a pneumatic cylinder or a hydraulic cylinder.

5. The pipe joint with dustproof function according to claim 1, characterized in that: The tube body (1) is also fixedly mounted with a support seat (6), which is provided with an axial hole. The diameter of the axial hole, the diameter of the piston rod (2-2) and the diameter of the extension rod (4) are mutually adapted, and the piston rod (2-2) or the extension rod (4) passes through the axial hole.

6. The pipe joint with dustproof function according to any one of claims 1 to 5, characterized in that: The pipe joint with dustproof function also includes a movable joint (7), the movable joint (7) and the fixed joint (1-1) are adapted to each other, and one of the fixed joint (1-1) and the movable joint (7) is a male joint and the other is a female joint.

7. The pipe joint with dustproof function according to claim 6, characterized in that: The fixed joint (1-1) is a female joint. The fixed joint (1-1) is provided with at least one locking block (8). The locking block (8) is movably mounted on the fixed joint (1-1) and arranged along the circumferential direction of the fixed joint (1-1). The locking block (8) has two states: a locked state and an unlocked state. In the locked state, the locking block (8) is partially located inside the cylinder corresponding to the inner wall of the fixed joint (1-1). In the unlocked state, the locking block (8) is completely located outside the cylinder corresponding to the inner wall of the fixed joint (1-1). The movable joint (7) is a male joint. A circle of grooves (7-1) is provided on the outer side of the movable joint (7). The movable joint (7) is connected to the fixed joint (1-1). When the locking block (8) is in the locked state, the locking block (8) is snapped into the groove (7-1).

8. The dustproof pipe joint according to claim 7, characterized in that: The pipe joint with dustproof function further comprises a second driving device (9), the rear end of which can be rotatably mounted on the pipe body (1) or the clamping seat (5), and the front end of the second driving device (9) is provided with a telescopic rod (9-1) capable of reciprocating linear motion; a pipe wall of the fixed joint (1-1) is provided with a mounting groove (1-2), the mounting groove (1-2) is arranged along the axial direction of the fixed joint (1-1), a rotating shaft (1-3) is provided between two sides of the mounting groove (1-2), the axial direction of the rotating shaft (1-3) is perpendicular to the axial direction of the fixed joint (1-1), a locking block (8) is provided with an eccentric hole and is passed through the rotating shaft (1-3), and one end of the locking block (8) located outside the fixed joint (1-1) is rotatably connected to the telescopic rod (9-1); the axial direction of the rear end of the second driving device (9), the axial direction of the rotatable connection between the locking block (8) and the telescopic rod (9-1), and the axial direction of the rotating shaft (1-3) are parallel to each other.

9. The pipe joint with dustproof function according to claim 8, characterized in that: The second driving device (9) is a pneumatic cylinder or a hydraulic cylinder.

10. The pipe joint with dustproof function according to claim 8, characterized in that: The fixed joint (1-1) has 2 to 4 locking blocks (8) evenly arranged along the annular direction, and each locking block (8) is provided with a set of second driving devices (9).

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