Connecting joint

Abstract

The utility model discloses a connecting joint which comprises a mounting seat, a plurality of first joints and a plug-in assembly, the plurality of first joints are arranged on the mounting seat at intervals in the circumferential direction of the mounting seat; the plugging assembly comprises a rotating disc, a first driving mechanism and a second joint, the rotating disc is rotatably mounted above the mounting seat along the axis in the vertical direction, the first driving mechanism is connected with the rotating disc, and the second joint is movably mounted on the rotating disc in the vertical direction, so that when the rotating disc rotates, the first driving mechanism is connected with the second joint; and the second joint can selectively correspond to one of the plurality of first joints and is vertically, downwards and movably inserted into the first joints. The device is simple in structure, convenient to use and low in cost.

Description

Technical Field

[0001] The utility model relates to the technical field of connecting joints, in particular to a connecting joint. Background Art

[0002] In automated production equipment, it is sometimes necessary to input a variety of different liquids or gases into the same infusion main through different pipelines and then transport them to the destination, or to transport the same liquid or gas to different pipelines.

[0003] CN111425629A A pipeline switching mechanism with a connecting joint comprises a valve opening structure, an inner column and an outer ring rotatably sleeved outside the inner column, an avoidance pit being provided on the inner circumferential surface of the outer ring, a central hole and a plurality of peripheral holes surrounding the central hole being provided on the end surface of the inner column, each peripheral hole being connected to the central hole via a connecting hole, the connecting hole being provided with an extension section of a straight structure penetrating the circumferential surface of the inner column, a plug being sealably and movably penetrated in the connecting hole; of all the plugs, only one plug can have its outer end located in the avoidance pit at the same time; when the outer end of the plug is located in the avoidance pit, the plug loses its sealing effect on the connecting hole under the action of the valve opening structure; when the outer end of the plug is offset from the avoidance pit, the plug is sealed and closed in the connecting hole under the squeezing action of the outer ring; a connecting joint is provided on the central hole.

[0004] However, the above-mentioned prior art has a complex structure and high cost. Utility Model Content

[0005] The purpose of the utility model is to overcome the above technical deficiencies, provide a connecting joint, and solve the technical problems of complex structure and high cost in the prior art.

[0006] In order to achieve the above technical purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides a connecting joint, comprising:

[0008] Mounting seat;

[0009] A plurality of first joints, wherein the plurality of first joints are arranged on the mounting seat at intervals along the circumference of the mounting seat; and

[0010] The plug-in assembly includes a turntable, a first driving mechanism and a second joint. The turntable is rotatably installed above the mounting seat along a vertical axis, the first driving mechanism is connected to the turntable, and the second joint is movably installed on the turntable along a vertical direction, so that when the turntable rotates, the second joint can select one of the multiple first joints and be movably plugged into the first joint vertically downward.

[0011] In some embodiments, the connecting joint also includes a connecting shaft, which is fixedly installed in the middle of the mounting seat, and a mounting hole is provided in the middle of the turntable. The turntable is rotatably installed on the connecting shaft through the mounting hole, wherein a plurality of first joints are arranged at intervals along the circumference of the connecting shaft, and the distance from the first joint to the connecting shaft is the same as the distance from the second joint to the connecting shaft.

[0012] In some embodiments, there is a gap between the mounting base and the turntable;

[0013] The first driving mechanism includes a first motor, a driving gear, and a driven gear. The first motor is fixedly mounted on the mounting seat, and the main shaft of the first motor extends vertically upward into the gap. The driving gear and the driven gear are both located in the gap. The driving gear is fixedly mounted on the main shaft of the first motor, and the driven gear is fixedly mounted on the turntable. The driving gear is meshed with the driven gear.

[0014] In some embodiments, the turntable is provided with an installation channel along the vertical direction, the second joint is slidably installed in the installation channel, and both ends of the second joint extend out of the installation channel.

[0015] In some embodiments, the connecting joint further includes a second driving mechanism, which is disposed on the turntable, and a driving end of the second driving mechanism is connected to the second joint for driving the second joint to move in a vertical direction.

[0016] In some embodiments, the second driving mechanism includes a mounting frame, a screw rod, a nut and a second motor. The mounting frame is installed on the upper side of the turntable. The mounting frame is provided with a mounting plate arranged with intervals from top to bottom with the turntable. The screw rod is rotatably installed on the mounting plate along the vertical axis. The nut is connected to the upper end of the second joint. The screw rod is threadedly matched with the nut. The second motor is installed on the mounting plate, and the main shaft of the second motor is connected to the upper end of the screw rod.

[0017] In some embodiments, the second joint is provided with a step hole, and the step hole is provided with an upwardly disposed step surface;

[0018] The second joint includes a joint body, a sliding sleeve and a sealing hose. The joint body is provided with a first flow channel. The joint body is slidably installed on the turntable along the vertical direction. The sliding sleeve is slidably installed on the lower end of the first flow channel. The outer periphery of the lower end of the sliding sleeve is convexly provided with a stopper. The sealing hose is sleeved on the outer periphery of the sliding sleeve, and the upper end of the sealing hose abuts against the lower end surface of the joint body, and the lower end of the sealing hose abuts against the stopper, so that when the joint body moves downward, the sliding sleeve abuts against the step surface to compress the sealing hose, so that the sealing hose is sealed and matched with the side wall of the step hole.

[0019] In some embodiments, a first air chamber is formed on the side wall of the installation channel, and the turntable is further provided with a first interface communicating with the first air chamber;

[0020] A first opening communicating with the first flow channel is provided on the outer periphery of the middle portion of the joint, and the first opening is located in the first air chamber.

[0021] In some embodiments, a second flow channel is provided at the upper end of the connecting shaft, a second opening connected to the second flow channel is provided on the side wall of the connecting shaft, an annular groove is provided on the side wall of the middle portion of the connecting shaft, the second opening is provided in the annular groove, a second air chamber is formed between the annular groove and the mounting hole, the turntable is provided with a second interface connected to the second air chamber, and the first interface and the second interface are connected by a pipe.

[0022] In some embodiments, a plurality of the first opening and a plurality of the second opening are provided.

[0023] Compared with the prior art, the utility model provides a connecting joint, wherein a plurality of the first joints are arranged on the mounting seat at intervals along the circumference of the mounting seat, the turntable is rotatably installed above the mounting seat along the vertical axis, the first driving mechanism is connected to the turntable, and the second joint is movably installed on the turntable along the vertical direction. During specific use, a plurality of the first joints are used to connect different gases or liquids. When a certain gas or liquid needs to be transported, the turntable can be driven to rotate by the first driving mechanism so that the second joint is rotated to the top of the corresponding first joint, and then the second joint is movably inserted downward into the first joint, and then the pump is started to transport the liquid (gas) source liquid (gas) into the container through the first joint and the second joint, so that a variety of different liquid (gas) gas supply pipelines can be gathered into one pipeline output. The present application has a simple structure, is easy to use, and has low cost.

[0024] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the preferred embodiment of the utility model is described in detail as follows with the accompanying drawings. The specific implementation method of the utility model is given in detail by the following embodiments and their drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of an embodiment of a connecting joint provided by the utility model;

[0026] Figure 2 yes Figure 1 The front view of the middle connection joint;

[0027] Figure 3 yes Figure 1 A front sectional view of the middle connection joint;

[0028] Figure 4 yes Figure 1 A top cross-sectional view of the middle connection joint;

[0029] Figure 5 yes Figure 1 A three-dimensional schematic diagram of the middle mounting seat;

[0030] Figure 6 yes Figure 1 A front sectional view of the middle mounting seat;

[0031] Figure 7 yes Figure 1 Cross-sectional view of the plug-in assembly.

[0032] Description of reference numerals:

[0033] 1-Mounting seat;

[0034] 2-first joint, 21-step hole, 22-step surface;

[0035] 3-turntable, 31-first air chamber, 32-first interface, 33-second air chamber, 34-second interface, 35-disc body, 36-seat body, 37-connecting seat;

[0036] 4-first driving mechanism, 41-first motor, 42-driving gear, 43-driven gear;

[0037] 5-second joint, 51-joint body, 511-first flow channel, 512-first opening, 52-sliding sleeve, 53-sealing hose;

[0038] 6-second driving mechanism, 61-mounting frame, 62-screw rod, 63-nut, 64-second motor;

[0039] 7-connecting shaft, 71-second flow channel, 72-second opening. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0041] In order to solve the technical problem of complex structure and high cost in the prior art, the utility model provides a connecting joint which can reduce the cost.

[0042] See also Figure 1 , Figure 1 It is a structural schematic diagram of a connecting joint in one embodiment of the utility model.

[0043] The utility model provides a connecting joint, comprising a mounting seat 1, a plurality of first joints 2 and a plug-in assembly; the plurality of first joints 2 are arranged on the mounting seat 1 at intervals along the circumference of the mounting seat 1; the plug-in assembly comprises a turntable 3, a first driving mechanism 4 and a second joint 5, the turntable 3 is rotatably installed above the mounting seat 1 along a vertical axis, the first driving mechanism 4 is connected to the turntable 3, and the second joint 5 is movably installed on the turntable 3 along a vertical direction, so that when the turntable 3 rotates, the second joint 5 can select to correspond to one of the plurality of first joints 2 and be movably plugged into the first joint 2 vertically downward.

[0044] In this embodiment, please refer to Figures 2 to 4 , multiple first joints 2 are arranged on the mounting seat 1 at intervals along the circumference of the mounting seat 1, the turntable 3 is rotatably installed above the mounting seat 1 along the vertical axis, the first driving mechanism 4 is connected to the turntable 3, and the second joint 5 is movably installed on the turntable 3 along the vertical direction. When used specifically, multiple first joints 2 are used to connect different gases or liquids. When a certain gas or liquid needs to be transported, the turntable 3 can be driven to rotate by the first driving mechanism 4, so that the second joint 5 is rotated to the top of the corresponding first joint 2, and then the second joint 5 is movably inserted downward into the first joint 2, and then the pump is started to transport the liquid (gas) source liquid (gas) into the container through the first joint 2 and the second joint 5, so that a variety of different liquid (gas) gas supply pipelines can be gathered into one pipeline output. The present application has a simple structure, is easy to use, and has low cost.

[0045] In one embodiment, see Figure 2The connecting joint also includes a connecting shaft 7, which is fixedly installed in the middle of the mounting seat 1. A mounting hole is provided in the middle of the turntable 3, and the turntable 3 is rotatably installed on the connecting shaft 7 through the mounting hole, wherein a plurality of first joints 2 are arranged at intervals along the circumference of the connecting shaft 7, and the distance from the first joint 2 to the connecting shaft 7 is the same as the distance from the second joint 5 to the connecting shaft 7.

[0046] In this embodiment, the mounting seat 1 is arranged in a disk shape as a whole, and the lower end of the connecting shaft 7 is fixedly installed in the center of the mounting seat 1. The turntable 3 includes a disk body 35 and a seat body 36. The seat body 36 is installed in the middle position of the upper side of the disk body 35. The seat body 36 and the middle part of the disk body 35 penetrate to form the mounting hole provided with a bearing, and the bearing is sleeved on the outer periphery of the connecting shaft 7 so that the turntable 3 is rotatably installed on the connecting shaft 7. A plurality of first joints 2 are arranged on a circumference with the center of the mounting seat 1 as a circle and the distance from the first joint 2 to the connecting shaft 7 as a radius, and a plurality of first joints 2 are evenly distributed, and the distance from the first joint 2 to the connecting shaft 7 is the same as the distance from the second joint 5 to the connecting shaft 7, thereby ensuring that when the turntable 3 rotates, the second joint 5 can correspond to the first joint 2.

[0047] In one embodiment, see Figures 2 to 3 , there is a gap between the mounting base 1 and the turntable 3; the first driving mechanism 4 includes a first motor 41, a driving gear 42, and a driven gear 43, the first motor 41 is fixedly mounted on the mounting base 1, and the main shaft of the first motor 41 extends vertically upward into the gap, the driving gear 42 and the driven gear 43 are both located in the gap, the driving gear 42 is fixedly mounted on the main shaft of the first motor 41, the driven gear 43 is fixedly mounted on the turntable 3, and the driving gear 42 is meshed with the driven gear 43.

[0048] In this embodiment, the turntable 3 and the mounting seat 1 are spaced from top to bottom so that there is a gap between the turntable 3 and the mounting seat 1. On the one hand, the gap is used to reserve space for the second joint 5 to move in the vertical direction. On the other hand, the gap is also used to provide a position for the installation of the first driving mechanism 4. The driven gear 43 is installed at the bottom of the turntable 3, and the driven gear 43 is coaxially arranged with the turntable 3. The driving gear 42 is located beside the driven gear 43 and meshes with the driven gear 43. The first motor 41 is installed at the bottom of the mounting seat 1, and the main shaft of the first motor 41 passes through the mounting seat 1 and extends into the gap. The driving gear 42 is fixedly installed on the main shaft of the first motor 41, and the driving gear 42 is driven to rotate by the first motor 41. The driving gear 42 is meshed with the driven gear 43, thereby driving the turntable 3 to rotate. With such an arrangement, the structure is compact.

[0049] In one embodiment, see Figure 3 and Figure 7 The turntable 3 is provided with an installation channel along the vertical direction, the second joint 5 is slidably installed in the installation channel, and both ends of the second joint 5 extend out of the installation channel.

[0050] In this embodiment, a connecting seat 37 is provided on the upper side of the turntable 3, and the connecting seat 37 and the turntable 3 are penetrated to form the installation channel, and the lower end of the installation channel is connected to the gap, and the second joint 5 is located in the installation channel, and the second joint 5 slides in the vertical direction, and the lower end of the second joint 5 extends out of the installation channel and is located in the gap. During specific use, when the first driving mechanism 4 drives the turntable 3 to rotate until the second joint 5 corresponds to one of the first joints 2, the second joint 5 is vertically and downwardly movably inserted into the first joint 2, so that the first joint 2 and the second joint 5 are connected.

[0051] In one embodiment, see Figures 2 to 3 The connecting joint further includes a second driving mechanism 6, which is disposed on the turntable 3, and a driving end of the second driving mechanism 6 is connected to the second joint 5 for driving the second joint 5 to move in a vertical direction.

[0052] In this embodiment, the second driving mechanism 6 is provided to drive the second joint 5 to move, so the degree of automation is high and the labor intensity of workers is reduced.

[0053] In one embodiment, see Figures 2 to 3The second driving mechanism 6 includes a mounting frame 61, a screw rod 62, a nut 63 and a second motor 64. The mounting frame 61 is installed on the upper side of the turntable 3. The mounting frame 61 is provided with a mounting plate arranged from top to bottom with the turntable 3. The screw rod 62 is rotatably installed on the mounting plate along the vertical axis. The nut 63 is connected to the upper end of the second joint 5. The screw rod 62 is threadedly matched with the nut 63. The second motor 64 is installed on the mounting plate. The main shaft of the second motor 64 is connected to the upper end of the screw rod 62.

[0054] In this embodiment, the mounting frame 61 is arranged in a "J" shape, the connecting seat 37 is located in the mounting frame 61, the mounting plate is arranged opposite to the connecting seat 37, the second motor 64 is installed on the upper side of the mounting plate, the main shaft of the second motor 64 extends downward through the mounting plate, the screw rod 62 is fixedly connected to the main shaft of the second motor 64, the nut 63 is fixedly connected to the upper end of the second joint 5, the screw rod 62 is threadedly matched with the nut 63, and when the second motor 64 drives the screw rod 62 to rotate, the screw rod 62 is threadedly matched with the nut 63, thereby driving the nut 63 and the second joint 5 to slide in the mounting channel, thereby achieving the purpose of the second joint 5 moving in the vertical direction.

[0055] In one embodiment, see Figures 5 to 7 The second joint 5 is provided with a step hole 21, and a step surface 22 arranged upward is provided in the step hole 21; the second joint 5 includes a joint body 51, a sleeve 52 and a sealing hose 53, a first flow channel 511 is provided in the joint body 51, the joint body 51 is slidably installed on the turntable 3 along the vertical direction, the sleeve 52 is slidably installed on the lower end of the first flow channel 511, and a stopper is convexly formed on the outer periphery of the lower end of the sleeve 52, the sealing hose 53 is sleeved on the outer periphery of the sleeve 52, and the upper end of the sealing hose 53 abuts against the lower end surface of the joint body 51, and the lower end of the sealing hose 53 abuts against the stopper, so that when the joint body 51 moves downward, the sleeve 52 abuts against the step surface 22 to compress the sealing hose 53, so that the sealing hose 53 is sealed and matched with the side wall of the step hole 21.

[0056] In this embodiment, when the second joint 5 is inserted into the first joint 2, in order to ensure the sealing between the first joint 2 and the second joint 5, the joint body 51 is slidably installed in the installation channel, the nut 63 is connected to the upper end of the joint body 51, the second motor 64 can drive the joint body 51 to slide, the sleeve 52 is slidably installed on the lower end of the first flow channel 511, so that the sleeve 52 can move relative to the joint body 51, the sealing hose 53 is sleeved on the outer periphery of the sleeve 52, and the upper and lower ends of the sealing hose 53 are respectively limited by the lower end surface of the joint body 51 and the stopper. When the lower end of the joint body 51 together with the sleeve 52 and the sealing hose 53 are all extended into the step hole 21, at this time, the second There is still a gap between the joint 5 and the side wall of the step hole 21, and there is a risk of leakage. At this time, the second driving mechanism 6 drives the joint body 51 to continue to move downward, so that the stopper abuts against the step surface 22, and the sliding sleeve 52 is limited by the step surface 22 and cannot continue to move downward. The sealing hose 53 is made of a flexible material and has a certain elasticity. Therefore, the joint body 51 can continue to move downward, thereby squeezing the sealing hose 53, causing it to deform outward and abut against the side wall of the step hole 21. The sealing of the first joint 2 and the second joint 5 is achieved through the sealing hose 53, and has good sealing performance. When the second joint 5 withdraws from the step hole 21, the sealing hose 53 returns to its initial state under the action of its own elastic force, which is convenient for the next docking.

[0057] Furthermore, since the nut 63 is installed at the upper end of the joint body 51, and the nut 63 needs to be threadedly matched with the screw rod 62, in order to avoid interference between the joint body 51 and the screw rod 62, an avoidance hole is provided at the upper end of the joint body 51, and the diameter of the avoidance hole is larger than the diameter of the screw rod 62, so that when the screw rod 62 and the nut 63 move relatively, the lower end portion of the screw rod 62 can extend into the avoidance hole to avoid interference with the joint body 51.

[0058] Furthermore, when the lead screw rotates, in order to avoid driving the nut 63 to rotate, a slot is provided on the upper side of the connecting seat 37, and the nut 63 is arranged in the slot. The nut 63 abuts against the side wall of the slot, thereby limiting the nut 63 and preventing it from rotating.

[0059] In one embodiment, see Figure 3 and Figure 7A first air chamber 31 is provided on the side wall of the installation channel, and the turntable 3 is also provided with a first interface 32 connected to the first air chamber 31; a first opening 512 connected to the first flow channel 511 is provided on the outer periphery of the middle part of the joint, and the first opening 512 is located in the first air chamber 31.

[0060] In this embodiment, since the upper end of the joint body 51 is provided with an avoidance hole, and the upper end of the joint body 51 needs to be connected to the nut 63, the outlet of the first flow channel 511 can only be set on the side of the joint body 51, and the middle part of the joint body 51 is located in the installation channel, so it is necessary to open the first air chamber 31 on the side wall of the installation channel, and the first air chamber 31 is arranged around the entire circumference of the installation channel, that is, the diameter of the first air chamber 31 is larger than the diameter of the installation channel, and the diameter of the installation channel is adapted to the diameter of the joint body 51, so the joint body 51 and the installation channel are connected. There is a gap between the first air chambers 31, and the gap can allow gas or liquid to flow. The first opening 512 is the outlet of the first flow channel 511, and the first opening 512 connects the first flow channel 511 and the first air chamber 31 respectively, so that the gas or liquid in the first flow channel 511 can flow into the first air chamber 31. The first interface 32 is connected to the first air chamber 31, so the fluid entering the first flow channel 511 passes through the first opening 512 and the first air chamber 31 and is finally discharged from the first interface 32. Such a configuration can avoid interference with the nut 63 above.

[0061] In one embodiment, see Figure 3 and Figure 7 A second flow channel 71 is provided at the upper end of the connecting shaft 7, a second opening 72 connected to the second flow channel 71 is provided on the side wall of the connecting shaft 7, an annular groove is provided on the side wall of the middle part of the connecting shaft 7, the second opening 72 is provided in the annular groove, a second air chamber 33 is formed between the annular groove and the mounting hole, the turntable 3 is provided with a second interface 34 connected to the second air chamber 33, and the first interface 32 and the second interface 34 are connected by a pipeline.

[0062] In this embodiment, since the second joint 5 is arranged offset from the center of the turntable 3, after the second joint 5 is connected to the container, when the turntable 3 is rotated, it is easy to drive the connecting pipe to rotate together, causing the pipe to be tangled. Therefore, a second flow channel 71 is provided at the upper end of the connecting shaft 7, and a second opening 72 connected to the second flow channel 71 is provided on the side wall of the connecting shaft 7. Since most of the connecting shaft 7 is located in the seat body 36 and the disk body 35, there is a problem of blocking the second opening 72. At the same time, the turntable 3 rotates relative to the connecting shaft 7. Therefore, an annular groove is provided on the side wall in the middle of the connecting shaft 7. Two openings 72 are provided in the annular groove, and the gap between the annular groove and the mounting hole forms the second air chamber 33. The second flow channel 71 is connected to the second air chamber 33 through the second opening 72. The second interface 34 is provided on the seat body 36 and is connected to the second air chamber 33. The first interface 32 and the second joint 5 are connected through a pipeline, so that the fluid enters the second flow channel 71 through the pipeline and is discharged from the upper port of the second flow channel 71. With such an arrangement, the external container only needs to be connected to the upper port of the second flow channel 71 to avoid tangling of the connecting pipeline when the turntable 3 rotates.

[0063] In one embodiment, see Figure 3 and Figure 7 , the first opening 512 and the second opening 72 are each provided in plurality.

[0064] In this embodiment, in order to ensure the flow rate, a plurality of the first openings 512 and the second openings 72 are provided, wherein the plurality of the first openings 512 are arranged at intervals along the circumference of the joint body 51 , and the plurality of the second openings 72 are arranged at intervals along the circumference of the connecting shaft 7 .

[0065] In order to better understand the present invention, the following Figures 1 to 7 The technical solution of the utility model is described in detail:

[0066] When in use, first, the first driving mechanism 4 drives the rotation, driving the second joint 5 to rotate to the top of the first joint 2 to be docked, and then the second driving mechanism 6 drives the joint body 51 to move downward, so that the lower end of the joint body 51 together with the sliding sleeve 52 and the sealing hose 53 are all extended into the step hole 21. At this time, there is still a gap between the second joint 5 and the side wall of the step hole 21. The second driving mechanism 6 drives the joint body 51 to continue to move downward, so that the stopper abuts against the step surface 22, and the sliding sleeve 52 is limited by the step surface 22 and cannot continue to move downward, and the sealing hose 53 is flexible. The material has a certain elasticity, so the joint body 51 can continue to move downward, thereby squeezing the sealing hose 53, causing it to deform outward and abut against the side wall of the step hole 21, and the sealing hose 53 is used to achieve the sealing of the first joint 2 and the second joint 5, so that the fluid can be transported. When the transportation is completed, the second driving mechanism 6 drives the joint body 51 to move upward, and the joint body 51 together with the sleeve 52 and the sealing hose 53 withdraw from the step hole 21 to complete the fluid transportation. When another fluid needs to be transported, the above steps can be repeated to make the second joint 5 dock with the required first joint 2.

[0067] The specific implementation methods of the utility model described above do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A connection joint, characterized in that: It includes: Mounting seat; A plurality of first joints, wherein the plurality of first joints are arranged on the mounting seat at intervals along the circumference of the mounting seat; as well as The plug-in assembly includes a turntable, a first driving mechanism and a second joint. The turntable is rotatably installed above the mounting seat along a vertical axis, the first driving mechanism is connected to the turntable, and the second joint is movably installed on the turntable along a vertical direction, so that when the turntable rotates, the second joint can select one of the multiple first joints and be movably plugged into the first joint vertically downward.

2. The connection joint according to claim 1, characterized in that: The connecting joint also includes a connecting shaft, which is fixedly installed in the middle of the mounting seat. A mounting hole is provided in the middle of the turntable, and the turntable is rotatably installed on the connecting shaft through the mounting hole, wherein a plurality of first joints are arranged at intervals along the circumference of the connecting shaft, and the distance from the first joint to the connecting shaft is the same as the distance from the second joint to the connecting shaft.

3. The connection joint according to claim 1, characterized in that: There is a gap between the mounting seat and the turntable; The first driving mechanism includes a first motor, a driving gear, and a driven gear. The first motor is fixedly mounted on the mounting seat, and the main shaft of the first motor extends vertically upward into the gap. The driving gear and the driven gear are both located in the gap. The driving gear is fixedly mounted on the main shaft of the first motor, and the driven gear is fixedly mounted on the turntable. The driving gear is meshed with the driven gear.

4. The connection joint according to claim 2, characterized in that: The turntable is provided with an installation channel along the vertical direction, the second joint is slidably installed in the installation channel, and both ends of the second joint extend out of the installation channel.

5. The connection joint according to claim 4, characterized in that: The connecting joint further comprises a second driving mechanism, which is arranged on the rotating disk, and a driving end of the second driving mechanism is connected to the second joint for driving the second joint to move in a vertical direction.

6. The connection joint according to claim 5, characterized in that: The second driving mechanism includes a mounting frame, a screw rod, a nut and a second motor. The mounting frame is installed on the upper side of the turntable. The mounting frame is provided with a mounting plate arranged with a spacing from top to bottom with the turntable. The screw rod is rotatably installed on the mounting plate along the vertical axis. The nut is connected to the upper end of the second joint. The screw rod is threadedly matched with the nut. The second motor is installed on the mounting plate, and the main shaft of the second motor is connected to the upper end of the screw rod.

7. The connection joint according to claim 4, characterized in that: The second joint is provided with a step hole, and the step hole is provided with an upwardly disposed step surface; The second joint includes a joint body, a sliding sleeve and a sealing hose. The joint body is provided with a first flow channel. The joint body is slidably installed on the turntable along the vertical direction. The sliding sleeve is slidably installed on the lower end of the first flow channel. The outer periphery of the lower end of the sliding sleeve is convexly provided with a stopper. The sealing hose is sleeved on the outer periphery of the sliding sleeve, and the upper end of the sealing hose abuts against the lower end surface of the joint body, and the lower end of the sealing hose abuts against the stopper, so that when the joint body moves downward, the sliding sleeve abuts against the step surface to compress the sealing hose, so that the sealing hose is sealed and matched with the side wall of the step hole.

8. The connection joint according to claim 7, characterized in that: A first air chamber is formed on the side wall of the installation channel, and the turntable is further provided with a first interface connected to the first air chamber; A first opening communicating with the first flow channel is provided on the outer periphery of the middle portion of the joint, and the first opening is located in the first air chamber.

9. The connection joint according to claim 8, characterized in that: A second flow channel is provided at the upper end of the connecting shaft, a second opening connected to the second flow channel is provided at the side wall of the connecting shaft, an annular groove is provided at the side wall in the middle of the connecting shaft, the second opening is provided in the annular groove, a second air chamber is formed between the annular groove and the mounting hole, the turntable is provided with a second interface connected to the second air chamber, and the first interface and the second interface are connected by a pipeline.

10. The connection joint according to claim 9, characterized in that: A plurality of the first openings and a plurality of the second openings are provided.

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