Double-medium rotating joint

Abstract

The utility model relates to the technical field of pipe joints, in particular to a double-medium rotary joint, which is characterized in that a fixing seat is hermetically connected to the top of a liquid inlet T-shaped pipe, an outer shell is arranged at the bottom of the liquid inlet T-shaped pipe, the liquid inlet T-shaped pipe is rotatably connected to a central pipe shaft through the outer shell, an air inlet inner pipe penetrates through the liquid inlet T-shaped pipe, and a liquid outlet inner pipe penetrates through the liquid inlet T-shaped pipe. The liquid inlet T-shaped pipe and the central pipe shaft are arranged in the fixing seat, the two ends of the air inlet inner pipe protrude out of the fixing seat and the central pipe shaft respectively, the fixing seat is rotationally connected to the air inlet inner pipe, the fixing seat and the air inlet inner pipe are connected in a sealed mode, the arranged liquid inlet T-shaped pipe and the central pipe shaft serve as a connector channel connected with the liquid inlet end, and the air inlet inner pipe is arranged in the liquid inlet T-shaped pipe in a penetrating mode. The sealing effect is achieved while the air inlet inner pipe and the liquid inlet T-shaped pipe can rotate relatively through the fixing base, the outer shell at the bottom of the liquid inlet T-shaped pipe is rotationally connected with the center pipe shaft and is in sealed connection with the center pipe shaft, liquid is prevented from seeping out of the opening, the sealing performance of the rotary connector is improved, and installation and use are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe joints, in particular to a dual-medium rotary joint. Background Art

[0002] Pipe joints refer to: pipe connection devices, and the connected pipes can rotate relative to each other, used to input fluid media from static pipes to dynamic rotating parts. Thanks to its ability to achieve 360° rotation of the medium transmission function, it is widely used in various equipment, and some equipment requires the introduction of two media to assist operation, such as polishing equipment, which requires the introduction of polishing liquid and air. The channel for the medium to enter keeps rotating during operation. For specific reference, the large turntable polishing machine with application number: CN202411149602.3 can be seen. However, due to The current air intake pipe is installed in the liquid inlet pipe, and the liquid inlet pipe and the air intake need to be separately diverted to each workstation. At the same time, the liquid inlet pipe needs to rotate with the turntable, which requires the use of a rotary joint. However, the current joint is directly inserted into the liquid inlet pipe through a T-tube, and the air intake pipe is installed in the T-tube. The joint lacks a sealing structure, which easily causes liquid to seep out from the joint. Since the polishing liquid includes chemical liquid components such as nitric acid, it needs to be properly handled during use to avoid leakage. Therefore, there is an urgent need for a joint that can improve sealing and is easy to use. Utility Model Content

[0003] The utility model provides a dual-medium rotary joint, so as to achieve the purpose of improving the sealing performance of the joint of the rotary joint.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a dual-medium rotary joint, comprising a liquid inlet T-tube, a fixed seat, a central tube shaft and an air inlet inner tube, the liquid inlet T-tube having two openings correspondingly arranged in the upper and lower parts, and a liquid inlet for introducing liquid, the two openings and the liquid inlet being connected to each other, the fixed seat being sealed and connected to the top of the liquid inlet T-tube, an outer shell being provided at the bottom of the liquid inlet T-tube, and being rotatably connected to the central tube shaft through the outer shell, the air inlet inner tube being passed through the liquid inlet T-tube, and the two ends of the air inlet inner tube protruding from the fixed seat and the central tube shaft respectively, the fixed seat being rotatably connected to the air inlet inner tube, and the fixed seat and the air inlet inner tube being sealed and connected, so that the liquid enters from the liquid inlet and flows out through the bottom of the central tube shaft.

[0005] Furthermore, sealing gaskets are provided on the two openings and the end surface of the liquid inlet.

[0006] Furthermore, the fixing seat is rotatably connected to the air intake inner pipe through a first bearing, and the outer shell is rotatably connected to the central pipe axis through a second bearing.

[0007] Furthermore, at least two first stopper seal rings abutting against the air intake inner pipe are arranged at intervals on the inner side of the fixing seat, and at least two second stopper seal rings abutting against the central pipe axis are arranged at intervals on the inner side of the outer shell.

[0008] Furthermore, a groove is provided on the top of the outer shell, and the bottom of the liquid inlet T-shaped tube abuts against the groove.

[0009] Furthermore, a first flange is provided on a side where the fixing seat and the liquid inlet T-shaped tube are close to each other, and a second flange is provided on the bottom of the central tube axis.

[0010] Compared with the prior art, the beneficial effects of the present invention are: the liquid inlet T-tube and the central tube axis are set as the joint channel connecting the liquid inlet end, the air inlet inner tube is passed through the liquid inlet T-tube, and the fixed seat is used to make the air inlet inner tube and the liquid inlet T-tube rotate relative to each other while achieving a sealing effect. The outer shell at the bottom of the liquid inlet T-tube is rotated to connect the central tube axis and is sealed with the central tube axis to prevent liquid from leaking from the opening, thereby improving the sealing performance of the rotary joint and facilitating installation and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0012] Figure 2 It is a cross-sectional view of the present utility model.

[0013] Figure 3 This is the exploded view of the utility model

[0014] Figure 4 This is a schematic diagram of the connection between the fixing seat and the air intake inner pipe in the present invention.

[0015] Figure 5 This is a schematic diagram of the connection between the liquid inlet T-tube, the outer shell and the central pipe axis in the utility model.

[0016] Figure 6 It is a structural schematic diagram of the liquid inlet T-tube in the utility model.

[0017] In the figure: liquid inlet T-tube 1, fixing seat 2, central tube shaft 3, air inlet inner tube 4, outer shell 5, opening 11, liquid inlet 12, first bearing 21, groove 50, second bearing 52, first Sterling seal ring 101, second Sterling seal ring 102. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] As shown in the accompanying drawings, the utility model is a dual-medium rotary joint, comprising a liquid inlet T-tube 1, a fixing seat 2, a central tube shaft 3 and an air inlet inner tube 4, wherein the liquid inlet T-tube 1 has two openings 11 correspondingly arranged above and below, and a liquid inlet 12 for introducing liquid, the two openings 11 and the liquid inlet 12 are connected to each other, the fixing seat 2 is sealed and connected to the top of the liquid inlet T-tube 1, the bottom of the liquid inlet T-tube 1 is provided with an outer shell 5, and is rotatably connected to the central tube shaft 3 through the outer shell 5, the liquid inlet T-tube 1 and the outer shell 5 are sealed, and the air inlet inner tube 4 is passed through the liquid inlet T-tube 1 , and the two ends of the air intake inner tube 4 protrude from the fixed seat 2 and the central tube axis 3 respectively. The fixed seat 2 is rotatably connected to the air intake inner tube 4, and the fixed seat 2 and the air intake inner tube 4 are sealed, so that the liquid enters from the liquid inlet 12 and flows out through the bottom of the central tube axis 3. The liquid inlet 12 is connected to the liquid end, and the top of the air intake inner tube 4 is connected to the air intake end. The liquid inlet T-tube 1 is the fixed end, and the air intake inner tube 4 rotates on the liquid inlet T-tube 1 through the fixed seat 2. The central tube axis 3 is fixedly connected to the main shaft of the equipment and rotates with the main shaft. It rotates on the liquid inlet T-tube 1 through the outer shell 5, so that the liquid inlet T-tube 1 is in a relatively fixed state.

[0020] The utility model discloses a dual-medium rotary joint, in which a liquid inlet T-tube 1 and a central pipe shaft 3 are provided as a joint channel for connecting the liquid inlet end, an air inlet inner tube 4 is passed through the liquid inlet T-tube 1, and a fixing seat 2 is utilized to enable the air inlet inner tube 4 and the liquid inlet T-tube 1 to rotate relative to each other while achieving a sealing effect, an outer shell 5 at the bottom of the liquid inlet T-tube 1 is rotatably connected to the central pipe shaft 3, and is sealed with the central pipe shaft 3 to prevent liquid from leaking from an opening 11, thereby improving the sealing performance of the rotary joint and facilitating installation and use.

[0021] In this embodiment, the end faces of the two openings 11 and the liquid inlet 12 are both provided with sealing gaskets, that is, each end face where the liquid inlet T-tube 1 is connected to other connectors is provided with a sealing gasket. The sealing gasket is made of soft material and is mainly used for sealing connections. Since the liquid inlet T-tube 1 and the connector are hard connections, the additional sealing gasket is used to enhance the sealing performance of each connection.

[0022] In this embodiment, the fixing seat 2 is rotatably connected to the intake inner pipe 4 through the first bearing 21, and the outer shell 5 is rotatably connected to the central tube shaft 3 through the second bearing 52. The first bearing 21 and the second bearing 52 can be ball bearings.

[0023] In this embodiment, at least two first stop-seal rings 101 abutting the inner intake pipe 4 are arranged at intervals on the inner side of the fixing seat 2, and at least two second stop-seal rings 102 abutting the central tube axis 3 are arranged at intervals on the inner side of the outer shell 5. The main purpose of providing multiple first stop-seal rings 101 and second stop-seal rings 102 is to increase the sealing performance. The main principle is to use soft stop-seal rings to abut the two hard sides respectively to prevent liquid from seeping out from the junction of the inner intake pipe 4 and the fixing seat 2, and from the junction of the outer shell 5 and the central tube axis 3.

[0024] In this embodiment, a groove 50 is provided on the top of the outer shell 5, and the bottom of the liquid inlet T-tube 1 abuts against the groove 50. The stepped structure is used to increase the contact surface between the outer shell 5 and the liquid inlet T-tube 1, and at the same time, the outer shell 5 is raised to be higher than the opening 11 at the bottom of the liquid inlet T-tube 1. On this basis, a sealing gasket is used to improve the sealing between the outer shell 5 and the liquid inlet T-tube 1.

[0025] In this embodiment, a first flange is provided on the side where the fixing seat 2 and the liquid inlet T-tube 1 are close to each other, and a sealing gasket is also provided between the two first flanges. A second flange is provided at the bottom of the central tube shaft 3, and a sealing gasket is provided on the second flange. The main shaft of the equipment has a flange, and a second flange is provided on the central tube shaft 3 to facilitate connection with the original flange on the main shaft.

[0026] The above embodiments are preferred embodiments of the present invention. All structures similar to those of the present invention and equivalent changes made thereto should fall within the scope of protection of the present invention.

Claims

1. A dual-medium rotary joint, characterized by: It includes a liquid inlet T-tube, a fixing seat, a central tube shaft and an air inlet inner tube. The liquid inlet T-tube has two openings correspondingly arranged at the upper and lower ends, and a liquid inlet for introducing liquid. The two openings and the liquid inlet are connected to each other. The fixing seat is sealed and connected to the top of the liquid inlet T-tube. The bottom of the liquid inlet T-tube is provided with an outer shell and is rotatably connected to the central tube shaft through the outer shell. The air inlet inner tube is penetrated by the liquid inlet T-tube, and the two ends of the air inlet inner tube protrude from the fixing seat and the central tube shaft respectively. The fixing seat is rotatably connected to the air inlet inner tube, and the fixing seat and the air inlet inner tube are sealed so that the liquid enters from the liquid inlet and flows out through the bottom of the central tube shaft.

2. A dual-medium rotary joint according to claim 1, characterized in that: The two openings and the end surface of the liquid inlet are both provided with sealing gaskets.

3. The dual-medium rotary joint according to claim 1, characterized in that: The fixing seat is rotatably connected to the air intake inner pipe through a first bearing, and the outer shell is rotatably connected to the central pipe axis through a second bearing.

4. The dual-medium rotary joint according to claim 3, characterized in that: At least two first seal rings abutting against the air intake inner pipe are arranged at intervals on the inner side of the fixing seat, and at least two second seal rings abutting against the central pipe axis are arranged at intervals on the inner side of the outer shell.

5. The dual-medium rotary joint according to claim 1, characterized in that: A groove is provided on the top of the outer shell, and the bottom of the liquid inlet T-shaped pipe abuts against the groove.

6. The dual-medium rotary joint according to claim 1, characterized in that: A first flange is provided on a side where the fixing seat and the liquid inlet T-shaped tube are close to each other, and a second flange is provided on the bottom of the central tube axis.

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