A leak early warning multi-layer seal rotary joint

Abstract

The utility model provides a kind of multi-layer sealing rotary joint of leakage early warning, including mutually nested inner ring and outer ring, inner ring and outer ring between are provided with ball groove, and the inside of ball groove is provided with several steel balls, the one end of inner ring is fixedly connected with static flange, first static seal and second static seal are provided between inner ring and static flange, the end of outer ring is fixedly connected with dynamic flange, the end of dynamic flange is sequentially provided with second dynamic seal, first dynamic seal, inner and outer ring seal and dynamic flange seal from inside to outside, the other side of second dynamic seal and first dynamic seal is attached inner ring, inner and outer ring seal is located between inner ring and outer ring, dynamic flange seal is located between outer ring and dynamic flange, leakage detection structure is provided on dynamic flange and static flange.The utility model, provided with multiple seals, ensure sealing effect, in addition leakage detection structure ensures the effectiveness of sealing.

Description

Technical Field

[0001] This utility model relates to the field of rotary joint technology, and in particular to a multi-layer sealed rotary joint with leakage early warning. Background Technology

[0002] Pipe swivel joints, also known as rotary joints, are hermetically sealed rotary connectors used for rotating and conveying media. Pipe swivel joints have a wide range of applications.

[0003] A conventional rotary joint consists of two nested pipe fittings with a sealing ring or similar structure between them. Generally, the better the seal (the larger the interference fit of the sealing ring), the more difficult it is to rotate the two pipe fittings; in other words, sealing performance and rotational efficiency are mutually exclusive. Furthermore, conventional rotary joints lack any corresponding leak detection mechanisms. Utility Model Content

[0004] To address the aforementioned problems, this utility model discloses a multi-layered sealing rotary joint with leakage warning, comprising an inner ring and an outer ring nested together. A ball groove is provided between the inner and outer rings, and several steel balls are arranged inside the ball groove. The structure of the inner and outer rings, in conjunction with the steel balls, enables axial rotation.

[0005] One end of the inner ring is fixedly connected to a stationary flange. A first stationary seal and a second stationary seal are provided between the inner ring and the stationary flange, and a detection channel is formed between the first and second stationary seals. A moving flange is fixedly connected to the end of the outer ring. From the inside out, the end of the moving flange is provided with a second moving seal, a first moving seal, inner and outer ring seals, and a moving flange seal. The other sides of the second and first moving seals are fitted against the inner ring, and a detection channel is formed between the second and first moving seals. The inner and outer ring seals are located between the inner and outer rings, and the moving flange seal is located between the outer ring and the moving flange. This multi-seal structure ensures the sealing effect of the rotary joint.

[0006] Both the moving flange and the stationary flange are equipped with leakage detection structures, and the installation channel and detection channel of the leakage detection structures are connected. The leakage detection structures are used to determine whether the seal of the rotating joint has failed.

[0007] Preferably, the leakage detection structure is a sight glass fixed inside the installation channel, and the inside of the detection channel is filled with a reagent that changes color after reacting with the material. If the conveyed material enters the detection channel, it will react with the reagent, and the color change can be observed through the sight glass to determine whether the seal has failed.

[0008] Preferably, the leakage detection structure is a pressure gauge fixed in the installation channel. The pressure gauge reading is used to determine whether the seal has failed.

[0009] Preferably, the leakage detection structure is a pressure sensor fixed in the installation channel, and the pressure sensor communicates with a host computer. That is, the sealing status is detected remotely.

[0010] Preferably, the pressure sensor is equipped with an indicator light. This allows for on-site determination of whether the seal has failed.

[0011] Preferably, the outer ring has holes on its sidewalls for installing steel balls, and the holes are fitted with plugs. That is, after the inner and outer rings are nested together, the steel balls are fed into the ball groove through the holes, and then the holes are sealed with plugs.

[0012] Preferably, the outer ring has an oil injection channel on its side wall, and an oil injection nozzle is provided at the end of the oil injection channel. Injecting lubricating oil into the ball groove improves the rotation effect of the rotating joint.

[0013] Preferably, a dust seal is provided between the inner ring and the outer ring, and the steel ball is located between the dust seal and the inner and outer ring seals. The dust seal, in conjunction with the inner and outer ring seals, seals the steel ball and prevents lubricating oil leakage.

[0014] Preferably, the swivel joint includes a plurality of fixing bolts, and the moving flange and the outer ring, and the stationary flange and the inner ring are all connected by fixing bolts.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. It is equipped with an inner ring and an outer ring. The inner ring and the static flange are equipped with a first static seal and a second static seal. The outer ring and the moving flange are equipped with a second dynamic seal, a first dynamic seal, inner and outer ring seals and a moving flange seal. That is, multiple seals ensure the sealing effect. In addition, a steel ball is installed between the inner ring and the outer ring, which helps to improve the smoothness of the rotation of the swivel joint.

[0017] 2. It is equipped with a leak detection structure to determine whether the seal of the rotating joint has failed. In addition, there are various leak detection structures, such as filling the inside of the sight glass with detection reagent, pressure gauge, pressure sensor, etc., to meet the needs of different scenarios. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the present invention.

[0019] List of reference numerals in the attached diagram:

[0020] 101. Dynamic flange; 102. Static flange; 103. First static seal; 104. Second static seal; 105. Inner ring; 106. Outer ring; 107. Steel ball; 108. Dustproof seal; 109. Dynamic flange seal; 110. Inner and outer ring seals; 111. First dynamic seal; 112. Second dynamic seal; 113. Leakage detection structure; 114. Fixing bolt; 115. Oil nozzle; 116. Plug. Detailed Implementation

[0021] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to the directions in the accompanying drawings, and the terms "inner" and "outer" refer to the directions toward or away from the geometric center of a specific component, respectively.

[0022] like Figure 1 As shown, a leak warning multi-layer sealing rotary joint includes an inner ring 105 and an outer ring 106 nested together. A ball groove is provided between the inner ring 105 and the outer ring 106, and a number of steel balls 107 are provided inside the ball groove. The structure of the ball groove and the steel balls 107 restricts the axial movement of the inner ring 105 and the outer ring 106, thus ensuring axial rotation.

[0023] One end of the inner ring 105 is fixedly connected to a stationary flange 102. A first stationary seal 103 and a second stationary seal 104 are provided between the inner ring 105 and the stationary flange 102, and the area between the first stationary seal 103 and the second stationary seal 104 is a detection channel to achieve sealing between the stationary flange 102 and the inner ring 105. The end of the outer ring 106 is fixedly connected to a dynamic flange 101. From the inside to the outside, the end of the dynamic flange 101 is provided with a second dynamic seal 112, a first dynamic seal 111, inner and outer ring seals 110, and a dynamic flange seal. 109. The second dynamic seal 112 and the first dynamic seal 111 are attached to the inner ring 105 on the other side, and the second dynamic seal 112 and the first dynamic seal 111 are a detection channel. The inner and outer ring seals 110 are located between the inner ring 105 and the outer ring 106, and the dynamic flange seal 109 is located between the outer ring 106 and the dynamic flange 101. This ensures the sealing between the dynamic flange 101 and the inner ring 105 and the outer ring 106 respectively. At the same time, the inner and outer ring seals 110 ensure the end face sealing of the gap between the inner ring 105 and the outer ring 106.

[0024] Both the dynamic flange 101 and the static flange 102 are equipped with a leakage detection structure 113, which is used to determine whether the seal of the rotary joint has failed. The installation channel and the detection channel of the leakage detection structure 113 are connected. If the rotary joint leaks, that is, the second static seal 104 or the second dynamic seal 112 fails, the material enters the detection channel, and its pressure and other factors change, which is used to determine whether the seal has failed.

[0025] The leak detection structure 113 is a sight glass fixed inside the installation channel, and the inside of the detection channel is filled with a reagent that changes color after reacting with the material. The sight glass is used to determine whether the reagent has reacted, i.e., whether the material has leaked.

[0026] The leak detection structure 113 is a pressure gauge fixed in the installation channel. The reading of the pressure gauge is used to determine whether a material leak has occurred.

[0027] The leak detection structure 113 is a pressure sensor fixed in the installation channel, and the pressure sensor communicates with the host computer. The sealing condition of the rotating structure can be remotely monitored. Furthermore, if a leak occurs, the pressure inside the detection channel will change. This pressure signal can be transmitted via cable or wirelessly to the upstream controller, interlocked with pipeline valves, or sent to terminal equipment, thus forming an intelligent safety protection interlock. This facilitates real-time monitoring of the rotating joint's status and intelligent management of the rotating joint.

[0028] In the field of rotary joints, the rotary joint can serve as the most basic device and be connected to the intelligent management network or cloud management platform of the entire factory. The intelligent management network or cloud management platform of the factory can store and monitor the pressure values ​​of the pressure sensor in real time to determine the sealing status of the rotary joint and ensure the safety of production operations.

[0029] The pressure sensor is equipped with an indicator light. The indicator light is provided to facilitate on-site assessment of whether a seal failure has occurred.

[0030] The outer ring 106 has holes on its sidewall for installing steel balls 107. The steel balls 107 enter the ball groove through the holes, and plugs 116 are installed on the holes to seal them.

[0031] The outer ring 106 has an oil injection channel on its side wall, and an oil injection nozzle 115 is provided at the end of the oil injection channel to improve the rolling performance of the steel ball 107.

[0032] A dust seal 108 is provided between the inner ring 105 and the outer ring 106, and the steel ball 107 is located between the dust seal 108 and the inner and outer ring seals 110. This achieves a relative seal between the chamber where the steel ball 107 is located, that is, a seal between the inner ring 105 and the outer ring 106, preventing lubricating oil leakage.

[0033] The swivel joint includes several fixing bolts 114, and the moving flange 101 and the outer ring 106, as well as the stationary flange 102 and the inner ring 105, are all connected by fixing bolts 114.

[0034] The technical means disclosed in this utility model are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features.

Claims

1. A multi-layer sealing rotary joint with leakage early warning system, characterized in that, It includes an inner ring (105) and an outer ring (106) nested together, with a ball groove between the inner ring (105) and the outer ring (106), and a number of steel balls (107) are arranged inside the ball groove. One end of the inner ring (105) is fixedly connected to a stationary flange (102). A first stationary seal (103) and a second stationary seal (104) are provided between the inner ring (105) and the stationary flange (102), and a detection channel is formed between the first stationary seal (103) and the second stationary seal (104). The end of the outer ring (106) is fixedly connected to a moving flange (101). The end of the moving flange (101) is provided with a second moving seal (112) and a first moving seal (104) sequentially from the inside to the outside. The system includes a dynamic seal (111), inner and outer ring seals (110), and a dynamic flange seal (109). The second dynamic seal (112) and the first dynamic seal (111) are fitted to the inner ring (105) on the other side, and a detection channel is formed between the second dynamic seal (112) and the first dynamic seal (111). The inner and outer ring seals (110) are located between the inner ring (105) and the outer ring (106), and the dynamic flange seal (109) is located between the outer ring (106) and the dynamic flange (101). Both the moving flange (101) and the stationary flange (102) are provided with a leakage detection structure (113), and the installation channel and the detection channel where the leakage detection structure (113) is located are connected.

2. The multi-layer sealing rotary joint for leakage early warning according to claim 1, characterized in that: The leakage detection structure (113) is a sight glass fixed inside the installation channel, and the inside of the detection channel is filled with a reagent that changes color after reacting with the material.

3. The multi-layer sealing rotary joint with leakage early warning according to claim 1, characterized in that: The leakage detection structure (113) is a pressure gauge fixed in the installation channel.

4. The multi-layer sealing rotary joint with leakage early warning according to claim 1, characterized in that: The leakage detection structure (113) is a pressure sensor fixed in the installation channel, and the pressure sensor communicates with the host computer.

5. The multi-layer sealing rotary joint with leakage early warning according to claim 4, characterized in that: The pressure sensor is equipped with an indicator light.

6. The multi-layer sealing rotary joint for leakage early warning according to claim 1, characterized in that: The outer ring (106) has a hole for installing a steel ball (107) on its side wall, and a plug (116) is provided on the hole.

7. The multi-layer sealing rotary joint with leakage early warning according to claim 1, characterized in that: The outer ring (106) has an oil injection channel on its side wall, and an oil injection nozzle (115) is provided at the end of the oil injection channel.

8. The multi-layer sealing rotary joint with leakage early warning according to claim 1, characterized in that: A dust seal (108) is provided between the inner ring (105) and the outer ring (106), and a steel ball (107) is located between the dust seal (108) and the inner and outer ring seals (110).

9. A multi-layer sealing rotary joint for leakage early warning according to claim 1, characterized in that: The swivel joint includes several fixing bolts (114), and the moving flange (101) and the outer ring (106), and the stationary flange (102) and the inner ring (105) are all connected by fixing bolts (114).

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