Safety protection adapter of geotechnical centrifuge rotary joint

Abstract

The invention relates to the technical field of geotechnical centrifuge equipment, in particular to a safety protection adapter of a geotechnical centrifuge rotating joint. A centrifuge connecting section is connected with a motor shaft or a speed reducer shaft; the rotary joint connecting section is connected with the rotary joint; the safety shear pin is mounted in mounting holes which are correspondingly formed in the centrifugal machine connecting section and the rotating joint connecting section; in a normal working state, the centrifugal machine connecting section transmits torque through the safety shear pin to drive the rotating joint connecting section to rotate synchronously, and the safety shear pin is broken when the rotating joint is blocked; when the rotary joint is blocked, the rotary joint can be quickly disconnected from a motor shaft or a speed reducer shaft to prevent a pipeline from being broken and protect related parts of a centrifugal machine, and medium transmission of a ground oil-water-gas station is cut off in time to prevent a conveyed medium from leaking.

Description

Technical Field

[0001] This invention relates to the field of geotextile centrifuge equipment technology, and specifically to a safety protection adapter for a geotextile centrifuge rotary joint. Background Technology

[0002] Geotechnical centrifuges are experimental devices used in geotechnical engineering and other fields. They simulate hypergravity fields using a stable centrifugal acceleration field generated by high-speed rotation. Based on the principle of model similarity, researchers can install various scaled-down experimental models inside the geotechnical centrifuge basket to conduct experimental studies on real-world structures such as 100-meter-high dams, giant landslides, and large buildings. This allows them to assess the safety of structures, understand the mechanisms of disaster occurrence, and verify disaster mitigation and prevention methods. Geotechnical centrifuges are widely used in geotechnical engineering, deep-earth and deep-sea engineering, underground environmental pollutant assessment, seismic resistance assessment of urban building structures, and high-energy explosion research, providing strong support for major strategic areas such as disaster prevention and mitigation in major engineering projects, energy development, and environmental protection.

[0003] Geotextile centrifuges mainly consist of components such as a rotating arm, a drive motor, and a suspended platform. For example... Figure 3 As shown, its working principle is as follows: the drive motor drives the rotating arm and the basket to rotate through the main shaft. During the rotation, the basket swings to the horizontal direction under the action of centrifugal force, thereby generating a constant centrifugal force perpendicular to the platform surface of the basket within the experimental model installed inside. The geotechnical centrifuge uses a rotary joint installed at the bottom of the motor shaft or the output shaft of the reducer to transmit high-pressure oil, water, gas, and other fluid media to the experimental model inside the centrifuge basket to meet the needs of various centrifugal simulation experiments.

[0004] The rotary joint consists of a rotating ring, a stationary ring, and internal seals. During installation, the rotating ring is directly connected to the motor shaft or reducer output shaft via screws and to the pipes inside the shaft via pipe fittings. The stationary ring is connected to the ground oil station, water station, and gas station via pipes. The rotating joint's internal seals prevent leakage between the rotating and stationary rings. During centrifuge operation, the rotating ring rotates synchronously with the centrifuge, while the stationary ring remains stationary. The relative rotation between the rotating and stationary rings allows media such as oil, water, and gas to be transmitted through pre-drilled holes on the rotating and stationary rings to the pipes inside the main shaft, thus supplying water, gas, and oil to the basket.

[0005] In actual use, due to factors such as contamination of the transmission medium or insufficient lubrication, rotary joints are prone to jamming caused by abnormal friction between the seals and the rotating ring. When the rotary joint jams, the geotextile centrifuge cannot stop immediately, causing the stationary ring to rotate along with the rotating ring and the geotextile centrifuge. This can lead to the pipes connected to the rotating and stationary rings being twisted, the screws connected to the motor shaft or reducer shaft being sheared, and leakage of the transmitted fluid media such as oil, water, and gas. In severe cases, it can cause the installation and fixing structure of the motor, reducer, and ground oil, water, and gas station to fail, damaging the motor, reducer, and oil, water, and gas station, posing a significant threat to the safe operation of the geotextile centrifuge. Summary of the Invention

[0006] In order to solve the above-mentioned technical problems, the present invention provides a safety protection adapter for the rotary joint of a geotextile centrifuge, which can quickly disconnect the rotary joint from the motor shaft or reducer shaft when jamming occurs to prevent pipeline breakage and protect related components of the centrifuge, and promptly cut off the medium transmission of the ground oil, water and gas station to prevent leakage of the transported medium.

[0007] This invention is achieved through the following technical solution:

[0008] A safety protection adapter for a geotextile centrifuge rotary joint is installed between the rotary joint and the motor shaft or reducer shaft of the geotextile centrifuge, the adapter comprising:

[0009] Centrifuge connecting section, which is connected to the motor shaft or reducer shaft;

[0010] A rotary joint connecting section, which is connected to the rotary joint;

[0011] A safety shear pin is installed in the mounting holes corresponding to the centrifuge connecting section and the rotary joint connecting section;

[0012] Under normal operating conditions, the centrifuge connecting section transmits torque through the safety shear pin to drive the rotary joint connecting section to rotate synchronously. When the rotary joint becomes stuck, the safety shear pin breaks.

[0013] Optionally, the breaking torque threshold of the safety shear pin is greater than the rotational resistance torque of the rotary joint under normal operating conditions, and less than the rotational resistance torque of the rotary joint under stuck conditions.

[0014] Optionally, the breaking torque threshold of the safety shear pin can be set by adjusting at least one of the diameter, cross-sectional shape, and installation position of the safety shear pin.

[0015] Optionally, it also includes a rotating flange and a thrust bearing, the thrust bearing being disposed between the rotating flange and the rotary joint connection section, the rotating flange being connected to the centrifuge connection section, the rotating flange applying a force toward the rotary joint connection section to the centrifuge connection section, so that the end faces of the centrifuge connection section and the rotary joint connection section are tightly attached.

[0016] Optionally, the inner ring of the thrust bearing is connected to the rotary joint connecting section, and the outer ring of the thrust bearing is connected to the rotating flange;

[0017] Under normal operating conditions, the inner and outer rings of the thrust bearing do not rotate relative to each other, and the rotary joint connecting section rotates synchronously with the centrifuge connecting section via the safety shear pin.

[0018] After the safety shear pin breaks, the inner and outer rings of the thrust bearing rotate relative to each other, the centrifuge connecting section continues to rotate with the motor shaft or reducer shaft, and the rotary joint connecting section stops rotating.

[0019] Optionally, the rotating flange and the centrifuge connecting section are connected by inter-segment screws, and the preload of the inter-segment screws makes the mating end face of the centrifuge connecting section and the rotary joint connecting section fit tightly.

[0020] Furthermore, after the safety shear pin breaks, the torque of the inter-segment screw overcomes the rotational resistance of the thrust bearing, causing the rotating flange to continue rotating with the centrifuge connecting section.

[0021] Furthermore, the adapter also includes a signal switch for issuing a control signal when relative rotation occurs between the centrifuge connection section and the rotary joint connection section.

[0022] Optionally, the signal switch is mounted on a component that rotates synchronously with the centrifuge connecting section and is positioned towards the rotary joint connecting section. When the rotary joint connecting section stops rotating while the signal switch continues to rotate with the centrifuge connecting section, the signal switch detects the relative rotation and sends out the control signal.

[0023] Optionally, the signal switch is installed on the bottom surface of the rotating flange, and the rotating flange rotates synchronously with the centrifuge connecting section;

[0024] The control signal is sent to the oil-water-gas pump station and the geotextile centrifuge control system to cut off the delivery of oil-water-gas media and trigger the geotextile centrifuge to stop.

[0025] Optionally, both the centrifuge connecting section and the rotary joint connecting section are provided with flow channels for transmitting oil, water, and gas media, and an O-ring is provided between the mating end faces of the centrifuge connecting section and the rotary joint connecting section to seal the flow channels.

[0026] Compared with the prior art, the present invention has the following features and beneficial effects:

[0027] This invention provides a safety protection adapter between the rotary joint and the motor shaft or reducer shaft. By using a safety shear pin, the torque can be controlled and interrupted. Compared with the existing method of transmitting torque through friction, the safety shear pin can precisely control the breaking torque threshold through parameters such as size, cross-sectional shape, and installation position. It can break in time after the rotary joint jams to interrupt the power input from the motor or reducer, thus providing reliable safety protection.

[0028] This invention decouples the motion between the rotary joint and the geocentrifuge through the cooperation of the rotating flange and the thrust bearing. This ensures that the rotary joint is no longer affected by the rotation of the geocentrifuge after it jams and stops rotating, and all structural components remain in their original installation positions. This prevents derivative accidents such as damage to connecting equipment caused by pipe entanglement and breakage, and detachment caused by broken rotary joint screws.

[0029] This invention enables a timely control signal to interrupt the transport of oil, water, and gas media after the rotary joint stops rotating due to jamming, via a signal switch, thus preventing leakage. At the same time, this signal can be linked to the geocentrifuge control system to trigger a shutdown, ensuring the safe operation of the geocentrifuge.

[0030] By installing the safety protection adapter between the rotary joint and the motor shaft or reducer shaft, the friction caused by jamming occurs on the contact end face of the centrifuge connection section and the rotary joint connection section, rather than on the end face of the motor shaft or reducer shaft. After damage, the safety protection adapter can be directly replaced on-site, significantly reducing replacement costs and time. Attached Figure Description

[0031] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the principles of the invention. These drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, but do not constitute a limitation on the embodiments of the present invention.

[0032] Figure 1 This is a structural schematic diagram of a safety protection adapter for a geotextile centrifuge rotary joint according to the present invention.

[0033] Figure 2 This is a schematic diagram of the installation of a safety protection adapter for a geotextile centrifuge rotary joint according to the present invention.

[0034] Figure 3 This is a simplified structural diagram of the geotextile centrifuge according to the present invention.

[0035] Reference numerals: 1-Centrifuge connection section, 2-Rotary joint connection section, 3-Rotating flange, 4-Safety shear pin, 5-Signal switch, 6-Thrust bearing, 7-Inter-section screw, 8-O-ring, 9-Flow channel. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0037] It should also be noted that, for ease of description, only the parts relevant to the present invention are shown in the accompanying drawings.

[0038] Where there is no conflict, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0039] Example 1

[0040] like Figure 1 and Figure 2 As shown, this embodiment provides a safety protection adapter for a geotextile centrifuge rotary joint, which is installed between the rotary joint and the motor shaft or reducer shaft of the geotextile centrifuge. The adapter includes: a centrifuge connecting section 1, a rotary joint connecting section 2, and a safety shear pin 4.

[0041] Centrifuge connecting section 1 is connected to the motor shaft or reducer shaft; centrifuge connecting section 1 is installed at the bottom of the output shaft of the geotextile centrifuge motor shaft or reducer by screws, and its upper end face is fitted and fixed to the end face of the motor shaft or reducer shaft. Centrifuge connecting section 1 is provided with mounting holes for various screws and safety shear pins 4.

[0042] Rotary joint connecting section 2 is connected to the rotary joint; the lower end of rotary joint connecting section 2 is connected to the rotating ring of the rotary joint by screws, so that the rotating ring of the rotary joint can rotate synchronously with rotary joint connecting section 2. Rotary joint connecting section 2 is also provided with mounting holes for various screws and safety shear pins 4.

[0043] Safety shear pin 4 is installed in the mounting holes corresponding to the centrifuge connecting section 1 and the rotary joint connecting section 2;

[0044] Under normal operating conditions, the centrifuge connecting section 1 transmits torque to the rotary joint connecting section 2 through the safety shear pin 4, thereby driving the rotary joint connecting section 2 and the rotary joint moving ring installed at its bottom to rotate synchronously.

[0045] When the rotary joint becomes stuck due to abnormal friction between the seal and the rotating ring, the resistance torque on the connecting section 2 of the rotary joint increases sharply, exceeding the breaking torque threshold of the safety shear pin 4. The safety shear pin 4 then breaks, thereby interrupting the power input from the motor or reducer and achieving safety protection. Unlike existing rotary joints that are directly connected to the motor shaft via screws and rely on end-face friction to transmit torque, the safety shear pin 4 can precisely control the breaking torque threshold, achieving controllable and safe disconnection.

[0046] Therefore, the breaking torque threshold of the safety shear pin 4 is an important parameter. The breaking torque threshold of the safety shear pin 4 is greater than the rotational resistance torque under normal operating conditions of the rotary joint, and less than the rotational resistance torque under stuck conditions of the rotary joint.

[0047] When the rotary joint is working normally, the seal between the rotating ring and the stationary ring generates a normal frictional resistance torque, which is relatively small. However, when the rotary joint becomes stuck, the abnormal friction between the seal and the rotating ring causes the resistance torque to increase sharply. The breaking torque threshold of the safety shear pin 4 is set between these two resistance torque values ​​to ensure that the safety shear pin 4 can completely transmit torque without breaking under normal working conditions, and to break in time when the torque exceeds the breaking threshold under stuck conditions.

[0048] The breaking torque threshold of the safety shear pin 4 is set by adjusting at least one of its diameter, cross-sectional shape, and installation position. A larger diameter results in stronger shear resistance and a higher breaking torque threshold. The cross-sectional shape (e.g., circular cross-section, cross-section with stress concentration grooves) affects the shear stress distribution, thus influencing the breaking threshold. The installation position, i.e., the radial distance of the safety shear pin 4 from the rotation center, increases the torque corresponding to the same shear force. By appropriately setting the parameters such as the diameter, cross-sectional shape, and installation position of the safety shear pin 4, the power input from the motor or reducer is interrupted when the rotary joint jams, thus achieving the purpose of safety protection.

[0049] Example 2

[0050] This embodiment further optimizes the entire adapter based on Embodiment 1.

[0051] The safety protection adapter also includes a rotating flange 3 and a thrust bearing 6. The thrust bearing 6 is located between the rotating flange 3 and the rotary joint connection section 2. The bottom end face of the flange of the rotary joint connection section 2 facing the rotary joint is provided with a thrust bearing 6 mounting platform. The thrust bearing 6 is mounted on the mounting platform, and the rotating flange 3 is mounted on the bottom of the thrust bearing 6.

[0052] In addition, the rotating flange 3 and the centrifuge connecting section 1 are connected by inter-section screws 7. The inter-section screws 7 are inserted from the top of the centrifuge connecting section 1 and exit from the bottom of the rotating flange 3, and then fixed by bolts. The preload of the inter-section screws 7 makes the mating end face of the centrifuge connecting section 1 and the rotary joint connecting section 2 fit tightly. Moreover, after the safety shear pin 4 breaks, the torque of the inter-section screws 7 overcomes the rotational resistance of the thrust bearing 6, so that the rotating flange 3 continues to rotate with the centrifuge connecting section 1.

[0053] The preload of the inter-section screw 7 has a dual function: on the one hand, it is used to make the mating end faces of the centrifuge connecting section 1 and the rotary joint connecting section 2 fit tightly to meet the media sealing requirements; on the other hand, after the safety shear pin 4 breaks, the preload of the inter-section screw 7 allows the rotating flange 3 to continue rotating with the centrifuge connecting section 1, without being braked by the rotary joint connecting section 2 due to the frictional resistance of the thrust bearing 6.

[0054] The rotating flange 3 is connected to the centrifuge connecting section 1. The rotating flange 3 applies a force toward the centrifuge connecting section 1 to the rotary joint connecting section 2, so that the end faces of the centrifuge connecting section 1 and the rotary joint connecting section 2 are tightly attached.

[0055] The inner ring of the thrust bearing 6 is connected to the rotary joint connecting section 2, and the outer ring of the thrust bearing 6 is connected to the rotating flange 3.

[0056] Under normal operating conditions, the inner and outer rings of the thrust bearing 6 do not rotate relative to each other, and the rotary joint connecting section 2 rotates synchronously with the centrifuge connecting section 1 via the safety shear pin 4.

[0057] After the safety shear pin 4 breaks, the inner and outer rings of the thrust bearing 6 rotate relative to each other, the centrifuge connecting section 1 continues to rotate with the motor shaft or reducer shaft, and the rotary joint connecting section 2 stops rotating.

[0058] The thrust bearing 6 has a dual function: first, it transmits the preload of the inter-section screws 7, ensuring that the axial preload of the centrifuge connecting section 1 and the rotary joint connecting section 2 meets the media sealing requirements; second, it decouples the motion of the two connecting sections. Under normal operating conditions, the inner and outer rings of the thrust bearing 6 do not rotate relative to each other. The rotary joint connecting section 2 rotates synchronously with the centrifuge connecting section 1 via the safety shear pin 4, and the following flange 3 also rotates synchronously. When the rotary joint experiences a jamming failure and the safety shear pin 4 breaks, the centrifuge connecting section 1 continues to rotate with the motor shaft or reducer shaft. The following flange 3 is connected to the centrifuge connecting section 1 via the inter-section screws 7, thus causing the outer ring of the thrust bearing 6 to continue rotating. Meanwhile, the rotary joint connecting section 2 stops rotating due to internal resistance, and the inner ring of the thrust bearing 6 stops as well. At this point, the inner and outer rings of the thrust bearing 6 rotate relative to each other, achieving motion decoupling between the centrifuge connecting section 1 and the rotary joint connecting section 2, and their motions do not affect each other.

[0059] Example 3

[0060] Based on Embodiment 2, in order to interrupt the transmission of oil, water, and gas media and stop the geotextile centrifuge, eliminating the risk of media leakage and ensuring equipment safety, the adapter also includes a signal switch 5, which is used to send a control signal when relative rotation occurs between the centrifuge connecting section 1 and the rotary joint connecting section 2. The signal switch 5 allows for timely detection of rotary joint jamming faults, thereby triggering subsequent safety protection actions.

[0061] The signal switch 5 is installed on the component that rotates synchronously with the centrifuge connecting section 1 and is positioned towards the rotary joint connecting section 2. Under normal operating conditions, the centrifuge connecting section 1 and the rotary joint connecting section 2 rotate synchronously, and there is no relative movement between the signal switch 5 and the rotary joint connecting section 2, so the signal switch 5 does not send a signal.

[0062] When the rotary joint gets stuck and the safety shear pin 4 breaks, the rotary joint connecting section 2 stops rotating while the signal switch 5 continues to rotate with the centrifuge connecting section 1. The signal switch 5 detects the relative rotation and sends out the control signal.

[0063] As a specific embodiment, the signal switch 5 is installed on the bottom surface of the rotating flange 3, which rotates synchronously with the centrifuge connecting section 1. The signal switch 5 is installed on the bottom surface of the rotating flange 3, facing the rotary joint connecting section 2, and can effectively detect the relative rotation between the rotating flange 3 and the rotary joint connecting section 2.

[0064] The control signal is sent to the oil-water-gas pump station and the geotextile centrifuge control system to cut off the delivery of oil-water-gas media and trigger the geotextile centrifuge to stop.

[0065] Example 4

[0066] This embodiment, based on Embodiment 1, describes the sealing structure of the flow channel 9 and the O-ring 8.

[0067] Both the centrifuge connecting section 1 and the rotary joint connecting section 2 are equipped with flow channels 9 for transmitting oil, water, and gas media. The flow channels 9 penetrate both the centrifuge connecting section 1 and the rotary joint connecting section 2, establishing a media transmission path from the pipe inside the motor shaft or reducer shaft to the rotary joint. Pipe fittings are also provided on the centrifuge connecting section 1 and the rotary joint connecting section 2, communicating with the flow channels 9 for connecting to external oil, water, and gas pipelines.

[0068] An O-ring 8 is provided between the mating end faces of centrifuge connecting section 1 and rotary joint connecting section 2. The O-ring 8 is used to seal the flow channel 9. The O-ring 8 is installed in a pre-set mounting groove on the mating end face of centrifuge connecting section 1 and rotary joint connecting section 2. It is compressed under the pre-tightening force provided by the inter-section screw 7, thereby forming a reliable seal on the flow channel 9 and preventing leakage of the transmitted oil, water and gas media at the mating end face.

[0069] In the description of this specification, the references to terms such as "one embodiment / mode," "some embodiments / modes," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment / mode or example is included in at least one embodiment / mode or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment / mode or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments / modes or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments / modes or examples described in this specification, as well as the features of different embodiments / modes or examples.

[0070] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0071] Those skilled in the art should understand that the above embodiments are merely for illustrating the present invention and are not intended to limit the scope of the invention. Those skilled in the art can make other changes or modifications based on the above invention, and these changes or modifications still fall within the scope of the present invention.

Claims

1. A safety protection adapter for a rotary joint of a geotextile centrifuge, installed between the rotary joint and the motor shaft or reducer shaft of the geotextile centrifuge, characterized in that, include: Centrifuge connecting section (1), which is connected to the motor shaft or reducer shaft; Rotary joint connecting section (2), which is connected to the rotary joint; Safety shear pin (4) is installed in the mounting holes corresponding to those provided in the centrifuge connecting section (1) and the rotary joint connecting section (2); Under normal operating conditions, the centrifuge connecting section (1) transmits torque through the safety shear pin (4) to drive the rotary joint connecting section (2) to rotate synchronously. When the rotary joint jams, the safety shear pin (4) breaks.

2. The safety protection adapter for the rotary joint of a geotextile centrifuge according to claim 1, characterized in that, The breaking torque threshold of the safety shear pin (4) is greater than the rotational resistance torque under normal operating conditions of the rotary joint, and less than the rotational resistance torque under stuck conditions of the rotary joint.

3. The safety protection adapter for the rotary joint of a geotextile centrifuge according to claim 2, characterized in that, The breaking torque threshold of the safety shear pin (4) is set by adjusting at least one of the diameter, cross-sectional shape and installation position of the safety shear pin (4).

4. The safety protection adapter for the rotary joint of a geotextile centrifuge according to claim 1, characterized in that, It also includes a rotating flange (3) and a thrust bearing (6), wherein the thrust bearing (6) is disposed between the rotating flange (3) and the rotary joint connection section (2), the rotating flange (3) is connected to the centrifuge connection section (1), and the rotating flange (3) applies a force toward the centrifuge connection section (1) to the rotary joint connection section (2), so that the end faces of the centrifuge connection section (1) and the rotary joint connection section (2) are tightly attached.

5. The safety protection adapter for the rotary joint of a geotextile centrifuge according to claim 4, characterized in that, The inner ring of the thrust bearing (6) is connected to the rotary joint connecting section (2), and the outer ring of the thrust bearing (6) is connected to the rotating flange (3). Under normal operating conditions, the inner and outer rings of the thrust bearing (6) do not rotate relative to each other, and the rotary joint connecting section (2) rotates synchronously with the centrifuge connecting section (1) through the safety shear pin (4). After the safety shear pin (4) breaks, the inner and outer rings of the thrust bearing (6) rotate relative to each other, the centrifuge connecting section (1) continues to rotate with the motor shaft or reducer shaft, and the rotary joint connecting section (2) stops rotating.

6. The safety protection adapter for the rotary joint of a geotextile centrifuge according to claim 5, characterized in that, The rotating flange (3) and the centrifuge connecting section (1) are connected by inter-section screws (7), and the pre-tightening force of the inter-section screws (7) makes the mating end face of the centrifuge connecting section (1) and the rotary joint connecting section (2) fit tightly. Furthermore, after the safety shear pin (4) breaks, the torque of the inter-segment screw (7) overcomes the rotational resistance of the thrust bearing (6), causing the rotating flange (3) to continue rotating with the centrifuge connecting section (1).

7. The safety protection adapter for the rotary joint of a geotextile centrifuge according to claim 4, characterized in that, It also includes a signal switch (5) for issuing a control signal when relative rotation occurs between the centrifuge connecting section (1) and the rotary joint connecting section (2).

8. The safety protection adapter for the rotary joint of a geotextile centrifuge according to claim 7, characterized in that, The signal switch (5) is installed on a component that rotates synchronously with the centrifuge connecting section (1) and is positioned toward the rotary joint connecting section (2). When the rotary joint connecting section (2) stops rotating while the signal switch (5) continues to rotate with the centrifuge connecting section (1), the signal switch (5) detects the relative rotation and sends out the control signal.

9. The safety protection adapter for the rotary joint of a geotextile centrifuge according to claim 7, characterized in that, The signal switch (5) is installed on the bottom surface of the rotating flange (3), and the rotating flange (3) rotates synchronously with the centrifuge connecting section (1); The control signal is sent to the oil-water-gas pump station and the geotextile centrifuge control system to cut off the delivery of oil-water-gas media and trigger the geotextile centrifuge to stop.

10. The safety protection adapter for the rotary joint of a geotextile centrifuge according to claim 1, characterized in that, Both the centrifuge connecting section (1) and the rotary joint connecting section (2) are provided with flow channels (9) for transmitting oil, water and gas media. An O-ring (8) is provided between the mating end faces of the centrifuge connecting section (1) and the rotary joint connecting section (2) for sealing the flow channels (9).

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