An isolation and protection system for rotating machinery

Abstract

This invention discloses an isolation and protection system for rotating machinery. The isolation and protection system includes a pneumatic module and an isolation module. The pneumatic module includes a pilot valve, an air inlet pipe, and a rotating air chamber. The pilot valve is fixed, and the rotating air chamber rotates around its own axis. The air inlet pipe is connected to the rotating air chamber through a bearing. The isolation module is equipped with a rotary joint, which includes a stationary channel, an adapter, and a rotating channel that are interconnected. One end of the stationary channel is fixedly connected to the pilot valve, and the other end is fixedly connected to the adapter. One end of the rotating channel is fixedly connected to the air inlet pipe, and the other end is connected to the adapter. The rotating channel is rotatable relative to the adapter around its axis. By setting a rotary joint, this invention physically isolates the torque of the air inlet pipe and the pilot valve, preventing abnormal rotation of the air inlet pipe from being transmitted to the pilot valve and causing the housing to rupture when the bearing is damaged, thus avoiding serious economic losses and production interruptions.

Description

Technical Field

[0001] This invention relates to the technical field of pneumatic control systems for large rotating machinery, and more specifically to an isolation and protection system for rotating machinery. Background Technology

[0002] In the pneumatic control systems of large rotating machinery such as hot forging presses, a rigid short pipe connection is typically used between the pilot valve and the intake pipe to ensure air circuit response speed and structural rigidity. However, this connection method has the following drawbacks: the bearing connecting the intake pipe and the rotating chamber shell is a vulnerable component. Once the bearing fails, the originally stationary intake pipe will be forcibly rotated along with the rotating chamber shell. Because the pilot valve and the intake pipe are rigidly connected, this abnormal rotation will directly transmit a huge torque to the precision pilot valve, causing its shell to rupture, resulting in significant economic losses and production interruptions. More seriously, the instantaneous failure of the pilot valve may trigger a severe leak of high-pressure oil and gas media, posing a direct safety threat to equipment and operators. Furthermore, the existing structure does not show obvious signs of bearing failure in the early and middle stages. Maintenance personnel can only discover the problem after the pilot valve has been completely destroyed and the equipment is malfunctioning, causing irreversible losses and prolonged downtime, affecting the production process.

[0003] Therefore, it is urgent to design an isolation and protection system to effectively prevent abnormal rotation of the intake pipe caused by damage to the rotating mechanical bearing, avoid catastrophic damage to the precision pilot valve, and reduce economic losses. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention provides an isolation and protection system for rotating machinery, solving the problem in the prior art where damage to the bearings of rotating machinery leads to abnormal rotation of the intake pipe and torque transmission to the pilot valve, causing rupture.

[0005] An isolation and protection system for rotating machinery according to a first aspect of an embodiment of the present invention includes: A pneumatic module includes a pilot valve, an air inlet pipe, and a rotating air chamber. The pilot valve is fixed, the rotating air chamber rotates around its own axis, and the air inlet pipe is connected to the rotating air chamber through a bearing. The isolation module includes a rotary joint connected between the pilot valve and the intake pipe. The rotary joint has a stationary channel, an adapter, and a rotating channel that are interconnected. One end of the stationary channel is fixedly connected to the pilot valve, and the other end is fixedly connected to the adapter. One end of the rotating channel is fixedly connected to the intake pipe, and the other end is connected to the adapter. The rotating channel can rotate freely about an axis relative to the adapter.

[0006] An isolation and protection system for rotating machinery according to an embodiment of the present invention has at least the following beneficial effects: This invention, by setting a rotary joint connecting the pilot valve and the intake pipe, physically isolates the torque of the pilot valve and the intake pipe, fundamentally avoiding the sudden rupture of the pilot valve due to the cascading effect of abnormal rotation of the intake pipe when the bearing is damaged. This effectively ensures the safety of the precision and expensive pilot valve. On the one hand, it helps to extend the service life of the pneumatic module and save high spare parts and maintenance costs. On the other hand, it completely eliminates the safety risk caused by high-pressure medium injection due to sudden rupture of the pilot valve.

[0007] According to some embodiments of the present invention, it further includes: an anti-malfunction module, the anti-malfunction module including a damping structure acting on the rotating channel, the damping structure applying adjustable rotational damping to the rotating channel.

[0008] According to some embodiments of the present invention, the damping structure includes an elastic clamp, which is fixedly disposed and sleeved on the rotating channel and abuts against the rotating channel to generate frictional damping.

[0009] According to some embodiments of the present invention, a friction pad is further provided between the elastic clamp and the rotating channel, and the two sides of the friction pad abut against the elastic clamp and the rotating channel respectively.

[0010] According to some embodiments of the present invention, the damping structure further includes an adjuster disposed on the elastic clamp, the adjuster being used to adjust the tightness of the elastic clamp to change the magnitude of the friction damping.

[0011] According to some embodiments of the present invention, it further includes: a monitoring module, which is used to monitor the rotation of the rotating channel and trigger an alarm when there is an abnormal rotation state.

[0012] According to some embodiments of the present invention, the monitoring module includes a non-contact sensor and a sensing plate fixedly installed on the rotating channel or the air intake pipe. The sensor obtains the rotation state of the rotating channel by monitoring the motion trajectory of the sensing plate.

[0013] According to some embodiments of the present invention, the sensor is an inductive proximity switch, and the sensing element is a metal sheet.

[0014] According to some embodiments of the present invention, the monitoring module further includes a controller and an alarm. The controller is connected to the sensor signal to monitor the rotation state of the rotating channel. When the controller detects that the rotary joint is rotating continuously, the controller triggers the alarm.

[0015] According to some embodiments of the present invention, the controller has a preset abnormal time threshold. When the controller detects that the rotary joint rotates continuously for a period of time exceeding the abnormal time threshold, the controller triggers the alarm.

[0016] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 A cross-sectional schematic diagram of an embodiment of an isolation and protection system for rotating machinery provided by the present invention; Figure 2 for Figure 1 A partial cross-sectional view of the central isolation module.

[0018] Icon labels: Pneumatic module 100; pilot valve 110; air inlet pipe 120; rotary air chamber 130; bearing 140; Isolation module 200; Rotary joint 210; Stationary channel 211; Adapter 212; Rotary channel 213; Anti-malfunction module 300; Damping structure 310; Elastic clamp 311; Friction pad 312; Adjuster 313; Monitoring module 400; sensor 410; sensing element 420. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0020] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0021] In the description of this invention, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or their sequential relationship.

[0022] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0023] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are some embodiments of the present invention, not all embodiments.

[0024] In the pneumatic control systems of large rotating machinery such as hot forging presses, a rigid short pipe connection is typically used between the pilot valve and the intake pipe to ensure air circuit response speed and structural rigidity. However, this connection method has the following drawbacks: the bearing connecting the intake pipe and the rotating chamber shell is a vulnerable component. Once the bearing fails, the originally stationary intake pipe will be forcibly rotated along with the rotating chamber shell. Because the pilot valve and the intake pipe are rigidly connected, this abnormal rotation will directly transmit a huge torque to the precision pilot valve, causing its shell to rupture, resulting in significant economic losses and production interruptions. More seriously, the instantaneous failure of the pilot valve may trigger a severe leak of high-pressure oil and gas media, posing a direct safety threat to equipment and operators. Furthermore, the existing structure does not show obvious signs of bearing failure in the early and middle stages. Maintenance personnel can only discover the problem after the pilot valve has been completely destroyed and the equipment is malfunctioning, causing irreversible losses and prolonged downtime, affecting the production process.

[0025] Therefore, it is urgent to design an isolation and protection system to effectively prevent abnormal rotation of the intake pipe caused by damage to the rotating mechanical bearing, avoid catastrophic damage to the precision pilot valve, and reduce economic losses.

[0026] To address the aforementioned problems, this invention provides an isolation and protection system for rotating machinery, which effectively solves the problem in the prior art where damage to the bearings of rotating machinery leads to abnormal rotation of the intake pipe and torque transmission to the pilot valve, causing rupture.

[0027] refer to Figure 1 and Figure 2 The present invention provides an isolation and protection system for rotating machinery, which is implemented in the following embodiments: Reference Figure 1 As shown, an isolation and protection system for rotating machinery according to an embodiment of the present invention includes a pneumatic module 100 and an isolation module 200.

[0028] The pneumatic module 100 includes a pilot valve 110, an air inlet pipe 120, and a rotating air chamber 130. The pilot valve 110 is fixed, the rotating air chamber 130 rotates around its own axis, and the air inlet pipe 120 is connected to the rotating air chamber 130 through a bearing 140.

[0029] The isolation module 200 includes a rotary joint 210 connected between the pilot valve 110 and the intake pipe 120. The rotary joint 210 is provided with a stationary channel 211, an adapter 212 and a rotating channel 213 that are interconnected. One end of the stationary channel 211 is fixedly connected to the pilot valve 110 and the other end is fixedly connected to the adapter 212. One end of the rotating channel 213 is fixedly connected to the intake pipe 120 and the other end is connected to the adapter 212. The rotating channel 213 can rotate freely around the axis relative to the adapter.

[0030] In this design, a rotary joint 210 replaces the rigid connection method in existing technologies. It is installed in series between the intake pipe 120 and the pilot valve 110. It is connected to the intake pipe 120 through a rotating channel 213 that can rotate freely around the axis, thereby physically isolating the intake pipe 120 and the pilot valve 110. When the bearing 140 is damaged, the function of the bearing 140 in absorbing and isolating torque disappears, and the intake pipe 120 rotates with the rotating chamber 130. At this time, the rotating channel 213 rotates with the intake pipe 120 without affecting the stationary state of the rest of the rotary joint 210. The huge torque generated by the rotating chamber 130 is absorbed by the rotating channel 213 and cannot be transmitted to the precision pilot valve 110. This fundamentally protects the precision and expensive pilot valve 110, prevents the pilot valve 110 housing from breaking and causing high economic losses and production interruptions, and avoids the pilot valve 110 from being damaged and causing violent leakage of high-pressure oil and gas medium, thus ensuring the safety of property and personnel.

[0031] Reference Figure 2 As shown, in this embodiment of the invention, the isolation protection system further includes an anti-maloperation module 300. The anti-maloperation module 300 includes a damping structure 310 acting on the rotating channel 213. The damping structure 310 applies adjustable rotational damping to the rotating channel 213. In this embodiment of the invention, the damping structure 310 includes an elastic clamp 311. The elastic clamp 311 is fixedly installed and sleeved on the rotating channel 213 and abuts against the rotating channel 213 to generate frictional damping, thereby providing the rotating channel 213 with a moderate static friction force sufficient to overcome environmental vibration interference.

[0032] In some other embodiments, the damping structure 310 may be other structures, such as a viscous fluid damper, as long as it provides appropriate damping for the rotation of the rotating channel 213.

[0033] The anti-maloperation module 300 enables the rotary channel 213 to have a preset torque threshold. When the torque received is less than the preset torque threshold, that is, when the bearing 140 is not damaged and is in a non-faulty state, the rotary channel 213 is kept stationary under the action of static friction and will not be affected by the vibration of the rotating machinery or other external factors. When the torque received is greater than the preset torque threshold, that is, when a fault occurs, the friction force received by the rotary channel 213 can be overcome, ensuring that the rotary channel 213 can start and rotate smoothly with the intake pipe 120.

[0034] Furthermore, in this embodiment of the invention, a friction pad 312 is provided between the elastic clamp 311 and the rotating channel 213. The two sides of the friction pad 312 abut against the elastic clamp 311 and the rotating channel 213 respectively, thereby filling the gap between the elastic clamp 311 and the rotating channel 213 to prevent relative sliding between the two due to inconsistent shapes or non-fitting surfaces, thus preventing the damping effect from failing.

[0035] For different application scenarios and rotating machinery, the damping structure 310 also includes an adjuster 313 disposed on the elastic clamp 311. The adjuster 313 is used to adjust the tightness of the elastic clamp 311 to change the magnitude of friction damping. When the environmental vibration interference is large and the rotational torque of the rotating machinery is large, the elastic clamp 311 is tightened by the adjuster 313 to increase the pressure between it and the rotating channel 213, which can provide greater static friction force, thereby increasing the preset torque threshold for the rotating channel 213 to start rotating, ensuring that the rotating channel 213 does not follow or rotate err due to external vibration interference. When the environmental vibration interference is small and the rotational torque of the rotating machinery is small, the elastic clamp 311 is loosened by the adjuster 313 to reduce the pressure between it and the rotating channel 213, thereby reducing the preset torque threshold for the rotating channel 213 to start rotating, ensuring that the rotating channel 213 can start rotating smoothly under a small torque, and ensuring the sensitivity of the rotating channel 213.

[0036] Furthermore, this embodiment of the invention also includes a monitoring module 400, which is used to monitor the rotation of the rotating channel 213 and trigger an alarm when there is an abnormal rotation state, thereby bringing forward the fault warning time, timely and effectively monitoring the fault status of the rotating machinery, enabling maintenance personnel to respond immediately and arrange planned maintenance, greatly shortening the fault location time, minimizing unplanned downtime, and ensuring production efficiency and improving maintenance efficiency.

[0037] In this embodiment of the invention, the monitoring module 400 includes a non-contact sensor 410 and a sensing plate 420 fixedly installed on the rotating channel 213 or the air intake pipe 120. The sensor 410 obtains the rotation state of the rotating channel 213 or the air intake pipe 120 by monitoring the movement trajectory of the sensing plate 420. The sensor 410 is an inductive proximity switch, which is a low-cost method for non-contact detection of metal objects. When a metal object moves toward or away from the proximity switch, the signal changes automatically. The sensing plate 420 is a metal sheet. When the rotating channel 213 or the air intake pipe 120 rotates, the sensing plate 420 rotates accordingly. The sensor 410 obtains the rotation state of the rotating channel 213 based on the movement trajectory of the sensing plate 420.

[0038] In this embodiment of the invention, the monitoring module 400 further includes a controller and an alarm. The controller is connected to the sensor 410 to monitor the rotation state of the rotating channel 213. The controller stores a preset abnormal time threshold. When the controller detects that the rotating joint 210 is rotating continuously and the rotation time exceeds the abnormal time threshold, the controller triggers the alarm.

[0039] This invention uses a damping structure 310 and the duration of abnormal rotation to comprehensively determine the fault status of rotating machinery. The damping structure 310 prevents false alarms caused by normal equipment vibration in hardware, and reasonable intelligent judgment logic prevents false alarms in software, thus ensuring the accuracy of fault monitoring.

[0040] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0041] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. An isolation and protection system for rotating machinery, characterized in that, include: A pneumatic module includes a pilot valve, an air inlet pipe, and a rotating air chamber. The pilot valve is fixed, the rotating air chamber rotates around its own axis, and the air inlet pipe is connected to the rotating air chamber through a bearing. The isolation module includes a rotary joint connected between the pilot valve and the intake pipe. The rotary joint has a stationary channel, an adapter, and a rotating channel that are interconnected. One end of the stationary channel is fixedly connected to the pilot valve, and the other end is fixedly connected to the adapter. One end of the rotating channel is fixedly connected to the intake pipe, and the other end is connected to the adapter. The rotating channel can rotate freely about an axis relative to the adapter.

2. The isolation and protection system for rotating machinery according to claim 1, characterized in that, Also includes: The anti-malfunction module includes a damping structure that acts on the rotating channel, and the damping structure applies adjustable rotational damping to the rotating channel.

3. The isolation and protection system for rotating machinery according to claim 2, characterized in that: The damping structure includes an elastic clamp, which is fixedly installed and sleeved on the rotating channel and abuts against the rotating channel to generate frictional damping.

4. The isolation and protection system for rotating machinery according to claim 3, characterized in that: A friction pad is also provided between the elastic clamp and the rotating channel, with the two sides of the friction pad abutting against the elastic clamp and the rotating channel respectively.

5. The isolation and protection system for rotating machinery according to claim 1, characterized in that: The damping structure also includes an adjuster disposed on the elastic clamp, the adjuster being used to adjust the tightness of the elastic clamp to change the magnitude of the friction damping.

6. The isolation and protection system for rotating machinery according to claim 1, characterized in that, Also includes: The monitoring module is used to monitor the rotation of the rotating channel and trigger an alarm when there is an abnormal rotation.

7. An isolation and protection system for rotating machinery according to claim 6, characterized in that: The monitoring module includes a non-contact sensor and a sensing plate fixedly installed on the rotating channel or the air intake pipe. The sensor obtains the rotation state of the rotating channel by monitoring the movement trajectory of the sensing plate.

8. The isolation and protection system for rotating machinery according to claim 7, characterized in that: The sensor is an inductive proximity switch, and the sensing element is a metal sheet.

9. An isolation and protection system for rotating machinery according to claim 7, characterized in that: The monitoring module also includes a controller and an alarm. The controller is connected to the sensor signal to monitor the rotation status of the rotating channel. When the controller detects that the rotary joint is rotating continuously, the controller triggers the alarm.

10. An isolation and protection system for rotating machinery according to claim 9, characterized in that: The controller has a preset abnormal time threshold. When the controller detects that the rotary joint rotates continuously for a time exceeding the abnormal time threshold, the controller triggers the alarm.

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